Method for manufacturing a socket for a separating insert for a zip fastener

Abstract

A zipper is provided. In at least one of a surface side and a back side of an inner surface of a plug hole constituting a socket, which opposes a surface and a back surface of a plug, a protrusion capable of engaging with a recess is provided, the protrusion is asymmetric with respect to a plane perpendicular to a plug-in direction of the protrusion and passing through a central portion of the protrusion in the plug-in direction of the plug, the protrusion includes: an upper side inclined surface that increases a thickness of the protrusion as an upper end portion of the protrusion in the plug-in direction of the plug moves downward; and a lower side inclined surface that increases the thickness of the protrusion as a lower end portion of the protrusion in the plug-in direction of the plug moves upward, an inclination of the upper side inclined surface is greater than an inclination of the lower side inclined surface.

Description

Technical Field

[0001] This invention relates to a zipper and a method for manufacturing a socket for a zipper insert. Background Technology

[0002] Typically, a zipper separator insert is located at the lower end of the left and right zipper teeth, including a pin on one side and a socket on the other. The zipper teeth are formed by installing rows of teeth on the inner edge of the zipper strip. With the zipper pull lowered to the lowest position where it contacts the separator insert, the left and right zipper teeth are open. The pin is then pulled out of the socket, passing through the tooth guide path of the zipper pull, and pulled upwards, thereby separating the left and right zipper teeth. In this separated state, the pin of one zipper teeth is passed through the tooth guide path of the zipper pull on the other zipper teeth, at the lowest position where it contacts the socket, and then inserted into the socket, thereby aligning the lower ends of the left and right zipper teeth. In this aligned state, the zipper pull is moved upwards, thereby closing the zipper teeth between the left and right zipper teeth.

[0003] If the zipper pull is not fully inserted into the socket, i.e., the lower ends of the left and right zipper teeth are not aligned, moving the zipper head upwards will cause the left and right zipper teeth to malfunction. To prevent this, users should be aware that the lower ends of the left and right zipper teeth are aligned.

[0004] For example, Patent Document 1 discloses a zipper detachable insert in which a zipper insert and a base bar are mounted in a receptacle body in a manner that allows for easy insertion and removal, with the insert bar and base bar being approximately parallel to each other. In this zipper detachable insert, a recess is provided at the top of one or both sides of the zipper insert, and a protrusion is provided on the inner surface of the engagement hole into which the zipper insert is inserted into the recess. Therefore, when the zipper insert is fully inserted into the receptacle, the recess of the zipper insert engages with and is held in place by the protrusion of the receptacle body. Because resistance is felt when the zipper insert is pulled out of the receptacle body, the user can easily perceive that the lower ends of the left and right zipper teeth are aligned simply by attempting to pull the zipper insert out of the receptacle body.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Utility Model Publication No. 7-3925 Summary of the Invention

[0008] Here, the zipper in Patent Document 1 is designed primarily to allow for easy insertion of the plug into the socket body even with one hand. By forming a conical surface on the protrusion and an inclined cam surface on the plug, the resistance between the plug and the protrusion when inserted into the engagement hole is reduced, resulting in smooth insertion. Therefore, it is difficult to feel resistance or make a sound when inserting the plug into the socket body, and the user may not even be aware of the insertion.

[0009] The present invention was made in view of the above-mentioned problems, and its object is to provide a method for manufacturing a zipper and a zipper release insert that allows the user to properly be aware that the plug has been inserted into the socket.

[0010] To address the aforementioned issues, the present invention is implemented through the following structure.

[0011] (1) A zipper, the zipper 100 comprising:

[0012] A pair of first and second zipper tooth straps 30A and 30B, comprising first zipper tooth strap 30A and second zipper tooth strap 30B;

[0013] At least one zipper pull 40 for opening and closing between the first zipper chain strap 30A and the second zipper chain strap 30B; and

[0014] The separating insert 1 is disposed at the lower end of the first zipper tooth strip 30A and the second zipper tooth strip 30B along their length.

[0015] The separation insert 1 includes:

[0016] The first separation insert 10 is disposed on the first zipper tooth tape 30A; and

[0017] The second separation insert 20 is disposed on the second zipper tooth tape 30B and can be connected to or disconnected from the first separation insert 10.

[0018] The first separating insert portion 10 has an insert rod 11, which is disposed on the inner edge side of the first zipper tooth tape 30A in the width direction.

[0019] The second separating insert portion 20 has a socket 21, which is disposed on the inner edge side of the second zipper tooth belt 30B in the width direction.

[0020] The socket 21 has a plug hole 25 that opens upwards, allowing the plug 11 to be inserted and removed along its length.

[0021] At least one of the surface 11b and the back surface 11c of the insertion rod 11 is provided with a recess 16 or 17.

[0022] At least one of the surface side 25a and back side 25b, which are opposite to the surface 11b and back side 11c of the plug hole 25 constituting the socket 21, is provided with a protrusion 26 or 27 that can engage with the recess 16 or 17.

[0023] The protrusions 26 and 27 are asymmetrical in shape with respect to the plane (P) perpendicular to the insertion direction of the insert rod 11 and passing through the center of the protrusions 26 and 27.

[0024] The protrusions 26 and 27 include: upper inclined surfaces 26a and 27a, which increase in thickness as the upper ends of the protrusions 26 and 27 move downwards from the insertion / removal direction of the insertion rod 11; and lower inclined surfaces 26b and 27b, which increase in thickness as the lower ends of the protrusions 26 and 27 move upwards from the insertion / removal direction of the insertion rod 11.

[0025] The inclination of the upper inclined surfaces 26a and 27a is greater than the inclination of the lower inclined surfaces 26b and 27b.

[0026] (2) A zipper, the zipper 100 comprising:

[0027] A pair of first and second zipper tooth straps 30A and 30B, comprising first zipper tooth strap 30A and second zipper tooth strap 30B;

[0028] At least one zipper pull 40 for opening and closing between the first zipper chain strap 30A and the second zipper chain strap 30B; and

[0029] The separating insert 1 is disposed at the lower end of the first zipper tooth strip 30A and the second zipper tooth strip 30B along their length.

[0030] The separation insert 1 includes:

[0031] The first separation insert 10 is disposed on the first zipper tooth tape 30A; and

[0032] The second separation insert 20 is disposed on the second zipper tooth tape 30B and can be connected to or disconnected from the first separation insert 10.

[0033] The first separating insert portion 10 has an insert rod 11, which is disposed on the inner edge side of the first zipper tooth tape 30A in the width direction.

[0034] The second separating insert portion 20 has a socket 21, which is disposed on the inner edge side of the second zipper tooth belt 30B in the width direction.

[0035] The socket 21 has a plug hole 25 that opens upwards, allowing the plug 11 to be inserted and removed along its length.

[0036] At least one of the surface 11b and the back surface 11c of the insertion rod 11 is provided with a recess 16 or 17.

[0037] At least one of the surface side 25a and back side 25b, which are opposite to the surface 11b and back side 11c of the plug hole 25 constituting the socket 21, is provided with a protrusion 26 or 27 that can engage with the recess 16 or 17.

[0038] The force Fin required to insert the plug into the plug hole 25 of the socket is greater than the force Fout required to pull the plug out of the plug hole 25 of the socket.

[0039] (3) A method for manufacturing a socket 21 of a zipper insert 1, characterized in that it includes:

[0040] In the socket 21, a process of providing protrusions 26 and 27 on the inner surfaces 25a and 25b of the plug hole 25 that allows the plug 11 to be inserted and removed.

[0041] The process of injection molding to obtain the socket 21 using a fixed mold 5, a movable mold 6 configured to reciprocate in the front-back direction relative to the fixed mold 5, and a first sliding member 7 and a second sliding member 8 configured to reciprocate in the vertical direction relative to the fixed mold 5; and

[0042] The process of forming a protrusion forming portion 26z for forming the protrusions 26 and 27 by engaging the first recess 26x recessed in the first slider 7 and the second recess 26y recessed in the second slider 8.

[0043] Invention Effects

[0044] According to the present invention, a method for manufacturing a zipper and a zipper release insert is provided, which allows a user to properly be aware that the plug has been inserted into the socket. Attached Figure Description

[0045] Figure 1 This is a front view of the zipper 100 according to the first embodiment of the present invention.

[0046] Figure 2 This is a magnified front view showing the disconnected state of the first and second zipper inserts, with the first zipper tooth tape separated from the second zipper tooth tape.

[0047] Figure 3 The side view of the slider is represented by dashed lines.

[0048] Figure 4 This is a perspective view of the first and second separation inserts.

[0049] Figure 5A This is a front view of the first separating insert portion as seen from the surface side.

[0050] Figure 5B This is a rear view of the first separating insert, viewed from the back side.

[0051] Figure 5C This is a right view of the first separating insert, viewed from the right side in the width direction.

[0052] Figure 6A This is a front view of the second separation insert viewed from the surface side.

[0053] Figure 6B This is a rear view of the second separating insert, viewed from the back side.

[0054] Figure 6C This is a left view of the second separating insert, viewed from the left side in the width direction.

[0055] Figure 7A This is a front view of the second separating insert portion as seen from the surface side. Figure 6C The AA section is shown in view of the socket body.

[0056] Figure 7B This is a rear view of the second separating insert, viewed from the back side. Figure 6C The BB section is shown in view of the socket body.

[0057] Figure 7C This is a left view of the second separating insert, viewed from the left side in the width direction. Figure 6A The CC section is shown in view of the socket body.

[0058] Figure 8 This is a partial cross-sectional view showing the state of the plug inserted into the plug hole of the socket, viewed from the width direction.

[0059] Figure 9 This is a perspective view showing the decoupled state of the first and second separation inserts in the zipper of the second embodiment.

[0060] Figure 10This is a perspective view of the first and second separation inserts.

[0061] Figure 11A This is a front view of the first separating insert portion as seen from the surface side.

[0062] Figure 11B This is a rear view of the first separating insert, viewed from the back side.

[0063] Figure 11C This is a right view of the first separating insert, viewed from the right side in the width direction.

[0064] Figure 12A This is a front view of the second separation insert viewed from the surface side.

[0065] Figure 12B This is a rear view of the second separating insert, viewed from the back side.

[0066] Figure 12C This is a left view of the second separating insert, viewed from the left side in the width direction.

[0067] Figure 13A This is a front view of the second separating insert portion as seen from the surface side. Figure 12C The AA section is shown in view of the socket.

[0068] Figure 13B This is a rear view of the second separating insert, viewed from the back side. Figure 12C The BB section is shown in view of the socket.

[0069] Figure 13C This is a left view of the second separating insert, viewed from the left side. Figure 12A The socket is shown in the CC section.

[0070] Figure 14 This is a partial cross-sectional view showing the state of the plug inserted into the plug hole of the socket, viewed from the width direction.

[0071] Figure 15 It is a perspective view of a forming mold used in the manufacturing process of a socket.

[0072] Figure 16 (a) is a side view of the first and second sliding members in the mold-open state, viewed from the width direction. Figure 16 (b) is a front view of the first and second sliding members in the mold-open state, viewed from the surface side. Figure 16 (c) is a top view of the first slider as seen from above.

[0073] Figure 17 (a) is a side view of the first and second sliding members in the mold-closed state, viewed from the width direction. Figure 17(b) is a front view of the first and second sliding members when viewed from the surface side in the mold-closed state.

[0074] Figure 18 (a) to (g) are process diagrams representing the steps of the injection molding method.

[0075] Figure 19 This is an example graph showing the relationship between the insertion distance of the probe relative to the probe hole (horizontal axis) and the insertion resistance (vertical axis).

[0076] Figure 20 This is an example of a graph showing the relationship between the distance the insert pin is pulled out relative to the insert pin hole (horizontal axis) and the pulling resistance (vertical axis).

[0077] Explanation of reference numerals in the attached figures

[0078] 1 Separating inserts 5 Fixed mold 6 Moving mold

[0079] 7 First sliding member; 7y First reciprocating recess; 8 Second sliding member

[0080] 8y Second reciprocating recess 10 First separating insert 11 Insert rod

[0081] 11a Protrusion 11b Surface 11c Back side 11d Lower surface 11e Locking groove 12 First reinforcing strip 13 First connecting part 13a Surface 13b Back side 14 Step 15 Thin-walled guide part 16 Side recess (concave) 16a Left side opening 16b Right side opening 16c Parallel surface 16d Upper inclined surface 16e Lower inclined surface 17 Back side recess (concave) 17a Left side opening 17b Right side opening 17c Parallel surface

[0082] 17d Upper inclined surface 17e Lower inclined surface 18a Upper part of the surface

[0083] 18b lower surface, 18c parallel surface, 18d first inclined surface

[0084] 18e Second inclined surface; 19a Upper part of the back; 19b Lower part of the back.

[0085] 19c Parallel plane 19d Inclined plane 20 Second separation insert

[0086] 21 Socket 21a Socket body 21ax Socket body recess

[0087] 21b seat rod 21bx seat rod concave part 21by seat rod half concave part

[0088] 21bz Wall 21c Cut-out portion 21d Locking portion

[0089] 22 Second reinforcing strip 23 Second connecting part 24 Thin-walled guide part

[0090] 25 insert hole; 25a front side (inner surface); 25b back side (inner surface)

[0091] 25c Right side (inner surface) 25d Left side (inner surface) 25x Insertion hole protrusion

[0092] 25y reverse groove side part protrusion 25ya first base part 25yb first top part

[0093] 25z groove side part convex part 26 front side convex part (convex part) 26a upper side inclined surface

[0094] 26ax Upper inclined surface forming part 26b Lower inclined surface 26bx Lower inclined surface forming part

[0095] 26c Parallel plane 26cxa Lower half of parallel plane forming part 26cxb Upper half of parallel plane forming part

[0096] 26x first recessed portion 26y second recessed portion 26z front side convex portion forming portion (convex portion forming portion)

[0097] 27. Back side protrusion (protrusion) 27a. Upper inclined surface 27b. Lower inclined surface

[0098] 27c parallel plane, 28x upper edge, 28y lower edge

[0099] 30A First zipper tooth chain strap; 30B Second zipper tooth chain strap; 31a First strap

[0100] 31b second band, 31bx band with recessed portion, 31by band with semi-recessed portion.

[0101] 31bz Positioning part; 31c With reinforcement part; 32 Chain tooth

[0102] 33 Upper stop part 40 Slider head 41 Slider head body

[0103] 42 Pull tab 43 Upper wing plate 43a Raised section

[0104] 44 Lower wing plate 44a Raised portion 46 Pull tab retaining portion

[0105] 53 Upper and lower extension walls 53x Upper and lower extension wall recesses 53y Upper and lower extension wall half recesses

[0106] 54 Front side main wall 54x Front side main wall recess 55 Back side main wall

[0107] 55x Recessed part on the back side main wall 56 Joint wall 56a Groove closure part

[0108] 56b Hole sealing portion; 56s Spatial portion for joint wall; 56x Recessed portion for joint wall.

[0109] 57 groove wall 57x groove wall recess 61 with groove

[0110] 61x Slotted projection 63 Sliding hole 63x Sliding hole projection

[0111] 71 First base portion 72 First sliding member main body portion 73 First side forming portion

[0112] 81 Second base portion 82 Second sliding member main body portion 83 Second side forming portion

[0113] 91 Cavity; 92 Gate; 92r Gate Resin Section

[0114] 92x entrance recess 92y exit recess 92z flat

[0115] 93 runner, 93r runner resin section, 93y runner semi-recessed section, 100 zipper. Detailed Implementation

[0116] Hereinafter, based on the accompanying drawings, a method for manufacturing a zipper and a socket for a zipper insert according to various embodiments of the present invention will be described in detail.

[0117] Furthermore, in this instruction manual, "up and down direction" refers to the sliding direction of the zipper pull, the length direction of the zipper or zipper teeth, and the insertion / removal direction of the push bar relative to the socket. Specifically, the direction in which the zipper pull slides to engage the left and right zipper teeth is designated as "up," and the direction in which the zipper pull slides to disengage the left and right zipper teeth is designated as "down."

[0118] Additionally, "left and right direction" refers to the direction in which a pair of chain teeth are aligned side by side, which is orthogonal to the sliding direction of the zipper pull. It can also be referred to as the width direction of the zipper or zipper teeth, chain strip, chain teeth, insert, and socket.

[0119] Furthermore, "back direction" refers to the direction orthogonal to the up and down and left and right directions, and can also be referred to as the thickness direction of the zipper or zipper teeth, chain teeth, inserts and sockets.

[0120] (First Embodiment)

[0121] Figure 1 This is a front view of the zipper 100 according to the first embodiment of the present invention. Figure 2 This is a magnified front view showing the disconnected state of the first and second zipper inserts, with the first zipper tooth tape separated from the second zipper tooth tape. Figure 3The side view of the slider is represented by dashed lines.

[0122] like Figure 1 and Figure 2 As shown, the zipper 100 includes: a pair of first zipper teeth 30A and second zipper teeth 30B (hereinafter, the zipper teeth are also simply referred to as "toothed zipper teeth"); a zipper pull 40 for opening and closing between the first zipper teeth 30A and the second zipper teeth 30B by moving the zipper pull 40 in the vertical direction by a user; and a zipper separator insert (hereinafter referred to as "separator insert") 1 according to an embodiment of the present invention, which is formed at the lower end of the first zipper teeth 30A and the second zipper teeth 30B in the longitudinal direction (vertical direction). In this example, there is one zipper pull 40 between the first zipper teeth 30A and the second zipper teeth 30B, but there may also be two.

[0123] The first zipper belt 30A and the second zipper belt 30B each include: a strip-shaped zipper belt (hereinafter referred to as "belt") 31a and 31b that are longer in the vertical direction; a spiral zipper tooth (hereinafter referred to as "tooth") 32 that is installed along the inner edge of the opening and closing side edge of each belt 31a and 31b in the width direction; and an upper stop 33 that restricts the upward movement of the zipper head 40.

[0124] In the future, the belt 31a constituting the first tooth chain belt 30A may be referred to as the first belt, and the belt 31b constituting the second tooth chain belt 30B may be referred to as the second belt. In this example, belts 31a and 31b are woven or braided from polyamide fibers, polyester fibers, acrylic fibers, etc., and the chain teeth 32 are formed from synthetic resins such as polyester and nylon, but are not limited to these. In addition, the chain teeth 32 are not limited to helical chain teeth, and may also be of the type where each chain tooth is independent.

[0125] The slider 40 includes a slider body 41 and a pull tab 42 connected to the slider body 41. Also refer to the side of the slider 40, indicated by dashed lines. Figure 3 The zipper pull body 41 includes: an upper wing plate 43 disposed on the front side of the first tooth chain belt 30A and the second tooth chain belt 30B; and a lower wing plate 44 disposed on the back side of the first tooth chain belt 30A and the second tooth chain belt 30B. The upper wing plate 43 and the lower wing plate 44 are connected by a guide post 45 at a central position above them in the left-right direction, thereby defining a Y-shaped tooth guide path that branches upward between the upper wing plate 43 and the lower wing plate 44.

[0126] Figure 1 or Figure 3 Reference numeral 46 in the attached drawing is a pull tab retainer 46 that connects to the pull tab 42 and protrudes from the upper wing plate 43. Figure 1With the lower ends of the first tooth chain strap 30A and the second tooth chain strap 30B connected by the separating insert 1 (described later), when the user holds the pull tab 42 and moves the zipper head body 41 upward, the left and right chain teeth 32 engage through the chain tooth guide path between the upper wing plate 43 and the lower wing plate 44, closing the first tooth chain strap 30A and the second tooth chain strap 30B. When the zipper head body 41 is moved downward, the engagement of the left and right chain teeth 32 is released, opening the first tooth chain strap 30A and the second tooth chain strap 30B.

[0127] On the left and right sides below the upper wing plate 43, raised portions 43a that bulge towards the lower wing plate 44 are provided in a manner that prevents the left and right chain teeth 32 from disengaging from the chain tooth guide path (see Figure 6). Additionally, on the left and right sides below the lower wing plate 44, raised portions 44a that bulge slightly towards the upper wing plate 43 are also provided. The interval T1 between these raised portions 43a and 44a is the minimum interval between the upper wing plate 43 and the lower wing plate 44. This minimum interval T1 is less than the maximum thickness of the chain teeth 32 in the front and back directions and greater than the thickness of the band 31.

[0128] The separating insert 1 is formed by injection molding or extrusion molding of thermoplastic resins such as polyacetal, polyamide, polypropylene, and polybutylene terephthalate into the reinforcing portion 31c. The reinforcing portion 31c is obtained by reinforcing the lower ends of the left and right strips 31a and 31b with thermoplastic resin. The reinforcing portion 31c is formed by welding a thermoplastic resin film such as polyamide or polyethylene to the lower ends of the left and right strips 31a and 31b through ultrasonic processing or the like, or by permeating and curing a thermoplastic resin liquid to the lower ends of the left and right strips 31a and 31b. Preferably, the reinforcing portion 31c is provided along the entire length of the width direction of each strip 31a and 31b.

[0129] The separating insert 1 includes: a first separating insert portion 10 disposed at the lower end of the first toothed chain belt 30A; and a second separating insert portion 20 disposed at the lower end of the second toothed chain belt 30B. The first separating insert portion 10 and the second separating insert portion 20 can be connected or disconnected. Figure 1 The diagram shows the connection state of the first separating insert 10 and the second separating insert 20. Figure 2 The enlarged view shows the disconnected state of the first separation insert 10 and the second separation insert 20.

[0130] Figure 4 This is a perspective view of the first separating insert 10 and the second separating insert 20. Figure 5A This is a front view of the first separating insert 10 viewed from the surface side. Figure 5B This is a rear view of the first separating insert 10, viewed from the rear side. Figure 5C This is a right view of the first separating insert 10 viewed from the right side in the width direction.

[0131] like Figures 1-2 and Figures 4-5C As shown, the first separating insert portion 10 includes: an insert bar 11, which is longer in the vertical direction and is disposed on the inner edge side of the lower end of the first tooth chain belt 30A in the width direction; a first reinforcing strip portion 12, which is longer in the vertical direction and is disposed approximately parallel to the insert bar 11 to the left in the width direction; and a first connecting portion 13, which connects the insert bar 11 and the first reinforcing strip portion 12 in the width direction.

[0132] In the direction of the back of the watch face, the thickness of the insert 11 is slightly thicker than the thickness of the first band 31a. Therefore, the surface 11b and the back face 11c of the insert 11 slightly bulge from the surface and back face of the first band 31a. The degree to which the surface 11b and the back face 11c of the insert 11 bulge from the surface and back face of the band 31 is the same as or slightly less than the degree to which the surface and back face of the chain tooth 32 bulge from the surface and back face of the bands 31a and 31b.

[0133] The insert rod 11 has a protrusion 11a protruding to the right at its upper right end. The protrusion 11a engages with the notch 21c of the seat rod 21b, which will be described later.

[0134] The insertion rod 11 is inserted into or removed from the insertion rod hole 25 of the socket 21 of the second separation insertion part 20 (described later), thereby connecting or disconnecting the first separation insertion part 10 and the second separation insertion part 20.

[0135] Recesses 16 and 17 are respectively provided on the lower sides of the surface 11b and the back surface 11c of the insert 11. These recesses 16 and 17 are recessed in a direction that reduces the thickness of the insert 11 in the surface-back direction. The recesses 16 and 17 are located slightly above the lower ends of the surface 11b and the back surface 11c. Furthermore, the recesses 16 and 17 do not necessarily have to be provided on both the surface 11b and the back surface 11c of the insert 11; they can be provided on at least one of the surface 11b and the back surface 11c. The recess 16 and 17 provided on the surface 11b is called the surface recess 16, and the recess provided on the back surface 11c is called the back recess 17.

[0136] The surface recess 16 includes: an upper inclined surface 16d that increases in thickness as the upper end of the surface recess 16 in the insertion / removal direction (vertical direction) of the insert rod 11 tilts downward toward the back side; a lower inclined surface 16e that increases in thickness as the lower end of the surface recess 16 in the insertion / removal direction of the insert rod 11 tilts upward toward the back side; and a parallel surface 16c that connects the upper inclined surface 16d and the lower inclined surface 16e and is parallel to the insertion / removal direction (vertical direction) and width direction (left-right direction) of the insert rod 11.

[0137] Additionally, the back recess 17 includes: an upper inclined surface 17d that increases in thickness as the upper end of the back recess 17 in the insertion / removal direction (vertical direction) of the insert rod 11 tilts downward toward the surface; a lower inclined surface 17e that increases in thickness as the lower end of the back recess 17 in the insertion / removal direction of the insert rod 11 tilts upward toward the surface; and a parallel surface 17c that connects the upper inclined surface 17d and the lower inclined surface 17e and is parallel to the insertion / removal direction (vertical direction) and width direction (left-right direction) of the insert rod 11.

[0138] The front recess 16 and the back recess 17 are formed along the entire length of the width direction of the surface 11b and the back surface 11c of the insert 11. Therefore, the front recess 16 and the back recess 17 each have a left-side opening 16a and 17a extending through the left side of the insert 11 in the width direction and a right-side opening 16b and 17b extending through the right side of the insert 11 in the width direction. The parallel surface 16c of the front recess 16, which serves as the bottom surface, is located on the front side compared to the surface 13a of the adjacent first connecting portion 13 in the width direction. Therefore, a step 14 is formed between the parallel surface 16c of the front recess 16 and the surface 13a of the first connecting portion 13. On the other hand, the parallel surface 17c of the back recess 17, which serves as the bottom surface, and the back surface 13b of the adjacent first connecting portion 13 in the width direction are smoothly connected to each other to form a flush plane, and the two form the same plane.

[0139] The upper surface 18a of the surface 11b of the insert 11, which is above the surface recess 16, is a parallel surface parallel to the vertical and width directions. The lower surface 18b of the surface 11b of the insert 11, which is below the surface recess 16, includes a parallel surface 18c, a first inclined surface 18d, and a second inclined surface 18e. The parallel surface 18c connects to the lower end of the surface recess 16 and extends parallel to the vertical and width directions. The first inclined surface 18d connects to the lower end of the parallel surface 18c and is inclined towards the rear surface 11c in the downward direction. The second inclined surface 18e connects the lower end of the first inclined surface 18d and the lower surface 11d of the insert 11 and is inclined towards the rear surface 11c in the downward direction. The inclination of the second inclined surface 18e is greater than that of the first inclined surface 18d.

[0140] The upper back portion 19a of the back surface 11c of the insert 11, which is located above the back recess 17, is a parallel surface parallel to the vertical and width directions. The lower back portion 19b of the back surface 11c of the insert 11, which is located below the back recess 17, includes a parallel surface 19c and an inclined surface 19d. The parallel surface 19c connects to the lower end of the back recess 17 and extends parallel to the vertical and width directions. The inclined surface 19d connects the lower end of the parallel surface 19c and the lower surface 11d of the insert 11, and is inclined towards the lower surface 11b. The inclined surface 19d connects the lower end of the first inclined surface 18d and the lower surface 11d of the insert 11.

[0141] The first reinforcing strip 12 is connected to the insert rod 11 via the first connecting part 13, thereby strengthening the fixation of the insert rod 11 relative to the first band 31a. The upper end of the first reinforcing strip 12 protrudes slightly upward compared to the upper end of the insert rod 11. The lower end of the insert rod 11 protrudes slightly downward compared to the lower end of the first reinforcing strip 12. The lateral width of the first reinforcing strip 12 is greater than the lateral width of the insert rod 11.

[0142] Before the first separating insert portion 10 with the first reinforcing strip 12 is formed, a through hole (not shown) is provided in the left side of the first band 31a corresponding to the first reinforcing strip 12 or the first connecting portion 13, penetrating the first band 31a in the direction of the back cover. Thermoplastic resin passes through this through hole and connects to the back cover of the first band 31a, thereby securing the first reinforcing strip 12 and the first connecting portion 13 to the back cover of the first band 31a, and increasing the peel strength of the first reinforcing strip 12 and the first connecting portion 13 relative to the first band 31a. Since the first reinforcing strip 12 and the first connecting portion 13 are securely fixed to the first band 31a in this way, the fixing of the insert 11 relative to the first band 31a becomes firm.

[0143] Figure 6A This is a front view of the second separating insert 20 viewed from the surface side. Figure 6B This is a rear view of the second separating insert 20, viewed from the rear side. Figure 6C This is a left view of the second separation insert 20 viewed from the left side in the width direction. Figure 7A This is a front view of the second separating insert 20 viewed from the surface side. Figure 6C The AA section is shown in view of the socket body 21a. Figure 7B This is a rear view of the second separating insert 20, viewed from the rear side. Figure 6C The BB section is shown in the view of the socket body 21a. Figure 7C This is a left view of the second separating insert 20 viewed from the left side. Figure 6A The CC section is shown in the view of the socket body 21a.

[0144] like Figures 1-2 and Figures 6A to 7C As shown, the second separate insertion portion 20 includes: a socket 21, which is provided to cover the inner edge of the lower end of the second tooth chain band 30B in the width direction; a second reinforcing strip 22, which extends to the right side away from the right side of the socket 21 in the width direction and upward; and a second connecting portion 23, which connects the socket 21 and the second reinforcing strip 22.

[0145] The socket 21 includes: a socket body 21a, which has a prong hole 25 on its left half for inserting and removing the prong 11 in the vertical direction (the length direction of the zipper 100) (see reference). Figure 4 (etc.); and a base rod 21b, which protrudes upward from the right half of the upper surface of the socket body 21a.

[0146] In the direction of the back of the watch face, the socket body 21a is thicker than the base rod 21b or the second reinforcing strip 22. In the direction of the back of the watch face, the base rod 21b has the same thickness as the insert rod 11. By inserting the insert rod 11 of the first separating insert portion 10 into the insert rod hole 25 of the socket body 21a of the second separating insert portion, the first separating insert portion 10 and the second separating insert portion 20 are connected (see reference). Figure 1 The lower ends of the first toothed chain band 30A and the second toothed chain band 30B are aligned. When the insert 11 is pulled out of the insert hole 25 of the socket body 21a, the connection between the first separation insert 10 and the second separation insert 20 is released.

[0147] The seat bar 21b is disposed on its inner edge along the width direction of the second tooth chain 30B and is integrally formed with the socket body 21a. The seat bar 21b has a notch 21c at its upper left end, which accommodates the protrusion 11a of the insert bar 11 when connected to the first separation insert portion 10 (see reference). Figure 2 With the first separating insert 10 and the second separating insert 20 connected, the upper end of the base rod 21b is slightly lower than the upper end of the insert rod 11.

[0148] Except for the base of the second reinforcing strip 22 connected to the socket 21, the second reinforcing strip 22 has a shape that is substantially the same as the first reinforcing strip 12, and its length in the vertical direction and its thickness in the back direction are the same as those of the first reinforcing strip 12.

[0149] Before the injection molding of the second separating insert portion 20, the second reinforcing strip 22 or the second connecting portion 23 has a through hole (not shown) in the second band 31b on the right side corresponding to the second reinforcing strip 22 or the second connecting portion 23, penetrating the second band 31b in the direction of the back cover. Furthermore, thermoplastic resin passes through this through hole and connects to the back cover of the second band 31b, thereby firmly fixing the second reinforcing strip 22 and the second connecting portion 23 to the back cover of the second band 31b, and increasing the peel strength of the second reinforcing strip 22 and the second connecting portion 23 relative to the second band 31b. Because the second reinforcing strip 22 and the second connecting portion 23 are thus firmly fixed to the second band 31b, the socket 21 is securely fixed relative to the second band 31b.

[0150] like Figure 2 As shown, the regions between the insert rod 11 and the first reinforcing strip 12 in the first separation insert portion 10, which are located above the socket body 21a, and the regions between the seat rod 21b and the second reinforcing strip 22 in the second separation insert portion 20, which are located above the socket body 21a, are thin-walled guide portions 15 and 24. The thickness of these guide portions 15 and 24 is relatively thin compared to the insert rod 11, seat rod 21b, first reinforcing strip 12, and second reinforcing strip 22 that protrude from the back surface of the belt 31. The pull head 40 can... Figure 1 The slider 40 moves to the lowest position where it contacts the socket body 21a. When the slider 40 is moved to the lowest position, the raised portions 43a and 44a on the left and right sides of the upper wing plate 43 and lower wing plate 44 of the slider 40 (refer to...) Figure 3 The pull head 40 is guided by the thin-walled guide portions 15 and 24 of the first separating insert portion 10 and the second separating insert portion 20. Figure 1 When the device moves to the lowest position where it contacts the separating insert 1, the insert bar 11 of the first separating insert 10 is pulled out of the socket body 21a. This causes the insert bar 11 to pass through the chain guide path between the upper wing plate 43 and the lower wing plate 44 of the zipper pull 40 and be pulled upwards. This disconnects the first separating insert 10 and the second separating insert 20, separating the first chain belt 30A from the second chain belt 30B. At this time, the zipper pull 40 remains on the second chain belt 30B.

[0151] The socket 21 of the first embodiment includes: a base rod 21b, which is parallel to the upper part of the vertically extending insertion rod 11 on the right side (second band 31b side); and a socket body 21a, which has an insertion hole 25 for inserting and disengaging the lower part of the insertion rod 11. Moreover, the insertion hole 25 is formed on the upper surface of the socket body 21a on the left side (first band 31a side), and the base rod 21b is engaged in an upwardly protruding state on the upper surface of the socket body 21a on the right side (second band 31b side) in the left-right direction.

[0152] The socket body 21a is a hexahedron comprising the left, right, top, and bottom faces of the front and back sides. Furthermore, in the illustrated example, each face is planar. The planar shape includes not only flat surfaces but also curved surfaces (curved surfaces and concave surfaces). For example, in the illustrated example, the front and back sides are curved surfaces with bulging edges (more specifically, surfaces that gradually bulge towards the center from both ends of the entire width). Additionally, the socket body 21a has a groove 61 on the left side of the first band 31a side for inserting the first band 31a. The groove 61 extends vertically and is open at the top and closed at the bottom. This groove 61 communicates with the insertion hole 25 on the second band 31b side, which is open at the top. On the other hand, the first band 31a side below the insertion hole 25 is closed, and a sliding hole 63 is provided through the second band 31b side.

[0153] The socket body 21a includes: an upper and lower extending wall 53 extending downward from the lower end of the base bar 21b; a front side main wall 54 and a back side main wall 55 protruding parallel to the first band 31a side in the left-right direction from both ends of the upper and lower extending wall 53; a joining wall 56 joining the lower ends of the first band 31a side ends of the front side main wall 54 and the back side main wall 55 along their entire length in the vertical direction; and groove walls 57, 57 protruding from the ends of the first band 31a side ends of the front side main wall 54 and the back side main wall 55 in a manner that narrows the gap between the front side main wall 54 and the back side main wall 55. Furthermore, the space formed between the pair of groove walls 57, 57 on the back of the watch face is called a groove 61. In the illustrated example, each groove wall 57 is formed over the entire range above the joining wall 56 along the entire length of the front side main wall 54 and the back side main wall 55 in the vertical direction. Therefore, the mating wall 56 is connected to the lower part of the pair of groove walls 57, 57 on the back of the watch. In addition, the socket 21 in this embodiment has an asymmetrical shape on the back of the watch, and the groove 61 is disposed on the back side compared with the center part of the socket 21 in the direction of the watch back, and is disposed closer to the back side main wall 55 than the watch side main wall 54.

[0154] The upper and lower extension walls 53 are rod-shaped with a rectangular cross-section. Furthermore, in the illustrated example, the left and right widths of the upper and lower extension walls 53 are larger than those of the base rod 21b. The faces of the first band 31a (the faces of the insertion hole 25) on the left and right sides of the upper and lower extension walls 53 are approximately flush with the corresponding faces of the base rod 21b. The faces of the second band 31b on the left and right sides of the upper and lower extension walls 53 protrude to the right compared to the base rod 21b. The vertical height of the upper and lower extension walls 53 is the same as that of the base rod 21b. In addition, the front main wall 54 and the back main wall 55, which protrude from both ends of the upper and lower extension walls 53 in the width direction (first band 31a side), are both plate-shaped.

[0155] The mating wall 56 includes: a groove closing portion 56a that closes the lower part of the groove 61; and a hole closing portion 56b that closes the first strip 31a side below the insertion hole 25. Therefore, the space surrounded by the mating wall 56 (hole closing portion 56b), the upper and lower extending walls 53, the front main wall 54, and the back main wall 55 becomes a space for inserting the first sliding member 7 for resin molding (see below). Figure 15 The sliding hole 63 is connected to the insertion rod hole 25.

[0156] The inner surface of the plug hole 25 constituting the socket 21 includes: a front side 25a, which is formed by the back side of the front side main wall 54 and is opposite to the surface 11b of the plug 11; a back side 25b, which is formed by the surface of the back side main wall 55 and is opposite to the back side 11c of the plug 11; a right side 25c, which is formed by the side of the first band 31a side (left side) of the upper and lower extending wall 53 and is opposite to the side of the second band 31b side (right side) of the plug 11; and a pair of left side surfaces 25d, 25d, which are formed by the side of the second band 31b side (right side) of a pair of groove walls 57, 57 on the back side and are opposite to the side of the first band 31a side (left side) of the plug. Since the groove 61 is located between the pair of left side surfaces 25d, 25d in the back side direction, the pair of left side surfaces 25d, 25d are far apart from each other in the back side direction.

[0157] In the inner surface of the plug hole 25 constituting the socket 21, on the surface side 25a and back side 25b opposite to the surface 11b and back side 11c of the plug 11, respectively, protrusions 26 and 27 are provided, which can engage with the surface side recess 16 and back side recess 17 of the plug 11. Furthermore, protrusions 26 and 27 do not need to be provided on both the surface side 25a and back side 25b; they only need to be provided on at least one of the surface side 25a and back side 25b. The protrusion provided on the surface side 25a (the back wall of the surface main wall 54) is called the surface side protrusion 26, and the protrusion provided on the back side 25b is called the back side protrusion 27.

[0158] like Figure 7A , Figure 7B and Figure 7C As shown, the front protrusion 26 and the back protrusion 27 are asymmetrical in shape relative to the central portion of the front protrusion 26 and the back protrusion 27 in the insertion and removal direction (vertical direction) through the insertion rod 11 and perpendicular to the aforementioned insertion and removal direction.

[0159] More specifically, the surface protrusion 26 includes: an upper inclined surface 26a that increases in thickness as the upper end of the surface protrusion 26 in the insertion / removal direction (vertical direction) of the insert rod 11 tilts toward the lower back side; and a lower inclined surface 26b that increases in thickness as the lower end of the surface protrusion 26 in the insertion / removal direction of the insert rod 11 tilts toward the upper back side, wherein the inclination of the upper inclined surface 26a is greater than the inclination of the lower inclined surface 26b.

[0160] In addition, the back side protrusion 27 includes: an upper inclined surface 27a that increases the thickness of the back side protrusion 27 as the upper end of the back side protrusion 27 in the insertion / removal direction (vertical direction) of the insertion rod 11 tilts downward toward the surface; and a lower inclined surface 27b that increases the thickness of the back side protrusion 27 as the lower end of the back side protrusion 27 in the insertion / removal direction of the insertion rod 11 tilts upward toward the surface, wherein the inclination of the upper inclined surface 27a is greater than the inclination of the lower inclined surface 27b.

[0161] In this way, the inclination of the upper inclined surfaces 26a and 27a that the insert rod 11 will contact when inserted into the insert rod hole 25 is set to be relatively steep, and the inclination of the lower inclined surfaces 26b and 27b that the insert rod 11 will contact when pulled out of the insert rod hole 25 is set to be relatively gentle. As a result, as will be described later, the force Fin required to insert the insert rod 11 into the insert rod hole 25 is greater than the force Fout required to pull the insert rod 11 out of the insert rod hole 25.

[0162] Furthermore, the front-side protrusion 26 and the back-side protrusion 27 each have parallel surfaces 26c and 27c, which connect the upper inclined surfaces 26a and 27a and the lower inclined surfaces 26b and 27b, and are parallel to the insertion / removal direction (vertical direction) and width direction (horizontal direction) of the insertion rod 11. These parallel surfaces 26c and 27c are arranged to intersect with the aforementioned plane P.

[0163] As described above, the front recess 16 and back recess 17 of the plug 11 are formed along the entire length of the plug 11 in the width direction. In contrast, the front protrusion 26 and back protrusion 27 of the socket 21 are formed on a portion of the width direction of the plug hole 25, rather than along the entire length of the width direction. Moreover, the length M1 of the front recess 16 and back recess 17 in the width direction (refer to...) Figure 5A and Figure 5B The length M2 in the width direction of the front side protrusion 26 and the back side protrusion 27 is greater than that of the front side protrusion 26 and the back side protrusion 27 (refer to...). Figure 7A and Figure 7B (M1 > M2). Additionally, the vertical length N1 of the front recess 16 and the back recess 17 (refer to...) Figure 5A and Figure 5BThe vertical length N2 of the front convex portion 26 and the back convex portion 27 (refer to) Figure 7A and Figure 7B They are roughly equal (N1≒N2).

[0164] Figure 8 This is a partial cross-sectional view, viewed from the width direction, showing the state in which the plug 11 is inserted into the plug hole 25 of the socket 21. Furthermore, Figure 8 The diagram shows the socket body 21a of the socket 21, but the socket bar 21b is omitted. Figure 8 As shown, with the plug 11 fully inserted into the plug hole 25 of the socket 21, the front protrusion 26 and back protrusion 27 of the socket 21 engage with the front recess 16 and back recess 17 of the plug 11, thus preventing the plug 11 from coming out of the socket 21. Therefore, after the plug 11 is combined with the socket 21, since the plug 11 will not shift, it is difficult to cause mismatch of the chain teeth, and it is also easy to pull the pull head 40 upward.

[0165] Here, in the position below the face-side recess 16 and the back-side recess 17 of the insert 11, the portion with the largest dimension in the face-back direction is the part between the pair of parallel surfaces 18c and 19c on the face back, and the face-back direction dimension of this part is L1. Conversely, the portion with the smallest dimension in the face-back direction in the insert hole 25 is the part between the parallel surfaces 26c and 27c of the pair of protrusions 26 and 27 on the face back, and the face-back direction dimension of this part is L2. Furthermore, the relationship between these dimensions L1 and L2 is L1 > L2, therefore, from above ( Figure 8 When the insert rod 11 is inserted into the insert rod hole 25 (on the right side), the lower end of the insert rod 11 ( Figure 8 The left end of the insertion rod 11 interferes with a pair of protrusions 26 and 27 on the back of the insertion rod hole 25. L1 is preferably configured to reduce the gap between the insertion rod 11 and the insertion rod hole 25 to prevent shaking when the insertion rod 11 is inserted.

[0166] More specifically, when the insert 11 is inserted into the insert hole 25, the first inclined surface 18d and the second inclined surface 18e on the front side or the inclined surface 19d on the back side of the insert 11 abuts against the upper inclined surfaces 26a and 27a of a pair of protrusions 26 and 27 on the back side.

[0167] By providing multiple inclined surfaces 26a, 27a, 18d, 18e, and 19d on the socket 21 or the plug 11, the plug 11 is smoothly guided between a pair of protrusions 26 and 27 on the back of the watch. Then, the parallel surfaces 18c and 19c on the back of the plug 11 abut against the upper inclined surfaces 26a and 27a and the parallel surfaces 26c and 27c of the protrusions 26 and 27. While pushing the socket 21 outward toward the back of the watch, the plug 11 passes over the protrusions 26 and 27, thereby engaging the front-side recess 16 and the back-side recess 17 of the plug 11 with the front-side protrusions 26 and the back-side protrusions 27 of the socket 21.

[0168] Here, as described above, the inclination of the upper inclined surfaces 26a and 27a is greater than that of the lower inclined surfaces 26b and 27b. Since the inclination of the upper inclined surfaces 26a and 27a, which will be in contact with the insertion rod 11 when it is inserted into the insertion rod hole 25, is relatively steep, the force Fin required to insert the insertion rod 11 into the insertion rod hole 25, i.e., the force required to make the insertion rod 11 pass over the protrusions 26 and 27 to engage, is set to be relatively large. Specifically, Fin is set to 4N to 6N. Furthermore, the method for measuring Fin will be described later.

[0169] Therefore, since a considerable force is required to fully insert the plug 11 into the plug hole 25, the user can obtain a clicking or snapping sensation by feeling the resistance or hearing the plug 11 as it passes over the protrusions 26 and 27, thus appropriately realizing that the plug 11 has been fully inserted into the socket 21.

[0170] In particular, in this embodiment, since recesses 16 and 17 are respectively provided on the surface 11b and back surface 11c of the insertion rod 11, and protrusions 26 and 27 are respectively provided on the surface 25a and back surface 25b of the insertion rod hole 25, the force Fin required for the protrusions 26 and 27 to engage with the recesses 16 and 17 is increased. This allows the user to more reliably obtain a clicking or snapping insertion sensation, and thus to appropriately recognize that the insertion rod 11 has been fully inserted into the socket 21. Since the engagement time of recess 16 will be staggered with the engagement time of recess 17 when the positions of recesses 16 and 17 are far apart in the insertion / removal direction, it is preferable that the positions of recesses 16 and 17 are the same or close in the insertion / removal direction. The same applies to the corresponding protrusions 26 and 27.

[0171] In addition, since the protrusions 26 and 27 have parallel surfaces 26c and 27c that smoothly connect the upper inclined surfaces 26a and 27a and the lower inclined surfaces 26b and 27b and are parallel to the insertion and removal direction (vertical direction) and width direction (left and right direction) of the insertion rod 11, the protrusions 26 and 27 and the recesses 16 and 17 can be engaged with less wobbling.

[0172] Additionally, recesses 16 and 17 extend through the insert 11 in the width direction, and have left-side openings 16a and 17a and right-side openings 16b and 17b (see reference). Figure 5A and Figure 5B Therefore, even if dirt or clothing fibers or other dust enter the recesses 16 and 17, it can be easily discharged from the left openings 16a and 17a and the right openings 16b and 17b. Furthermore, if dust accumulates in the recesses 16 and 17 as described above, the user will not experience a proper insertion sensation when inserting the insertion rod 11 into the insertion rod hole 25, which is therefore undesirable.

[0173] Furthermore, as described above, the length M1 in the width direction of the recesses 16 and 17 (refer to...) Figure 5A and Figure 5B The length M2 in the width direction of the protrusions 26 and 27 is set to be greater than that of the protrusions 26 and 27 (refer to...). Figure 7A and Figure 7B Therefore, the protrusions 26 and 27 can easily engage with the recesses 16 and 17. For example, it is possible that the insert 11 is inserted into the insert hole 25 at an angle in the width direction (left-right direction), but even in this case, the recesses 16 and 17 of the insert 11 reliably engage with the protrusions 26 and 27 of the insert hole 25. In addition, even when the protrusions 26 and 27 are in contact with the recesses 16 and 17 after engagement, the protrusions 26 and 27 elastically deform within the recesses 16 and 17 in the width direction, thus preventing the generation of local stress on the protrusions 26 and 27.

[0174] Furthermore, when the recesses 16 and 17 are engaged with the protrusions 26 and 27, the gap between the recesses 16 and 17 and the protrusions 26 and 27 in the width direction (left-right direction) is greater than the gap between the recesses 16 and 17 and the protrusions 26 and 27 in the insertion / removal direction (up-down direction) of the insert rod 11. This structure allows for a click-fitting insertion feel when the recesses 16 and 17 are engaged with the protrusions 26 and 27, and makes it easier for the protrusions 26 and 27 to be inserted into the recesses 16 and 17. Moreover, the width direction gap, as the former, is the length M1 of the recesses 16 and 17 in the width direction (refer to...). Figure 5A and Figure 5B The length M2 in the width direction of the protrusions 26 and 27 (refer to) Figure 7A and Figure 7B The difference between M1 and M2 is relatively large. The vertical gap of the latter is the vertical length N1 of recesses 16 and 17 (refer to...). Figure 5A and Figure 5B The vertical length N2 of the protrusions 26 and 27 (refer to) Figure 7A and Figure 7B The difference N1-N2 is zero or very small.

[0175] from Figure 8 From the state of the insertion rod 11, point it upwards ( Figure 8 When the right side of the insertion rod is pulled out, the lower end of the insertion rod 11 (as when it was inserted) is also pulled out in the same way. Figure 8 The left end of the probe hole 25 interferes with a pair of protrusions 26 and 27 on the back of the probe hole 25.

[0176] More specifically, when the plug 11 is pulled out of the plug hole 25, the lower inclined surfaces 16e and 17e of the recesses 16 and 17 on the back of the plug 11 abut against the lower inclined surfaces 26b and 27b of a pair of protrusions 26 and 27 on the back of the plug. By providing multiple inclined surfaces 26b, 27b, 16e, and 17e on the socket 21 or the plug 11, the plug 11 is smoothly guided between the pair of protrusions 26 and 27 on the back of the plug. Furthermore, the parallel surfaces 18c and 19c of the back of the plug 11 abut against the lower inclined surfaces 26b and 27b and the parallel surfaces 26c and 27c of the protrusions 26 and 27. While pushing the socket 21 outward in the direction of the back, the plug 11 passes over the protrusions 26 and 27, thereby releasing the engagement between the front recess 16 and the back recess 17 of the plug 11 and the front protrusion 26 and the back protrusion 27 of the socket 21.

[0177] Here, as described above, the inclination of the lower inclined surfaces 26b and 27b is less than that of the upper inclined surfaces 26a and 27a. Since the inclination of the lower inclined surfaces 26b and 27b that the insert 11 contacts when it is pulled out of the insert hole 25 is set to be relatively gentle, the force Fout required to pull the insert 11 out of the insert hole 25, i.e., the force required to release the engagement by moving the insert 11 over the protrusions 26 and 27, is set to be smaller. Specifically, Fout is set to be smaller than Fin. Furthermore, the method for measuring Fout will be described later.

[0178] (Second Implementation)

[0179] In the first embodiment, an example was described in which a first reinforcing strip 12 and a first connecting strip 13 are provided in the first separation insert portion 10 and a second reinforcing strip 22 and a second connecting strip 23 are provided in the second separation insert portion 20. However, it is also possible to provide the first reinforcing strip 12 and the first connecting strip 13 in the first separation insert portion 10 and the second reinforcing strip 22 and the second connecting strip 23 in the second separation insert portion 20, as described in the second embodiment below.

[0180] Figure 9 This is an enlarged perspective view showing the disconnected state of the first separation insert 10 and the second separation insert 20 in the zipper 100 of the second embodiment. Figure 10 This is a perspective view of the first separating insert 10 and the second separating insert 20. Figure 11A This is a front view of the first separating insert 10 viewed from the surface side. Figure 11B This is a rear view of the first separating insert 10, viewed from the rear side. Figure 11C This is a right view of the first separating insert 10 viewed from the right side in the width direction. Figure 12A This is a front view of the second separating insert 20 viewed from the surface side. Figure 12B This is a rear view of the second separating insert 20, viewed from the rear side. Figure 12C This is a left view of the second separation insert 20 viewed from the left side in the width direction. Figure 13A This is a front view of the second separating insert 20 viewed from the surface side. Figure 12C The AA section is shown in view of the socket 21. Figure 13B This is a rear view of the second separating insert 20, viewed from the rear side. Figure 12C The BB section is shown in view of socket 21. Figure 13C This is a left view of the second separating insert 20 viewed from the left side. Figure 12A The CC section is shown in view of socket 21.

[0181] The insertion rod 11 of the first separation insertion part 10 and the socket 21 of the second separation insertion part 20 involved in the second embodiment are substantially the same as those in the first embodiment. Therefore, the same reference numerals are used to mark the same parts, and the description is simplified or omitted.

[0182] like Figure 9 As shown, the base bar 21b includes a locking portion 21d, which protrudes from the upper end of the surface on the side of the first band 31a of the left and right sides of the base bar 21b toward the side of the first band 31a. The locking portion 21d is formed at the center of the base bar 21b in the front-back direction. Additionally, as... Figure 11C As shown, a locking groove 11e for receiving the locking portion 21d is recessed at the upper end of the surface of the second band 31b side on the left and right sides of the insertion rod 11.

[0183] Figure 14 A partial cross-sectional view, viewed from the width direction, showing the state in which the plug 11 is inserted into the plug hole 25 of the socket 21. Furthermore, in Figure 14 The diagram shows the socket body 21a of the socket 21, but the seat bar 21b is omitted. Similar to the first embodiment, as shown... Figure 14 As shown, with the plug 11 fully inserted into the plug hole 25 of the socket 21, the front protrusion 26 and back protrusion 27 of the socket 21 engage with the front recess 16 and back recess 17 of the plug 11, thus preventing the plug 11 from coming out of the socket 21. Therefore, after the plug 11 is combined with the socket 21, the plug 11 will not shift, making it difficult for chain tooth matching errors to occur, and making it easier to pull the pull head 40 upward.

[0184] Similar to the first embodiment, in this embodiment, the inclination of the upper inclined surfaces 26a and 27a is also greater than that of the lower inclined surfaces 26b and 27b. Since the inclination of the upper inclined surfaces 26a and 27a that the insert rod 11 contacts when inserted into the insert rod hole 25 is set to be relatively steep, the force Fin required to insert the insert rod 11 into the insert rod hole 25—that is, the force required to make the insert rod 11 pass over the protrusions 26 and 27 to engage—is set to be relatively large. Specifically, Fin is set to 4N to 6N. Furthermore, the method for measuring Fin will be described later.

[0185] Therefore, a considerable force is required to fully insert the plug 11 into the plug hole 25. The user can obtain a sense of insertion or a clicking sensation by the resistance or sound when the plug 11 passes over the protrusions 26 and 27, so that he / she can be appropriately aware that the plug 11 has been fully inserted into the socket 21.

[0186] From Figure 14 From the state of the insertion rod 11, point it upwards ( Figure 14 When the right side of the insertion rod is pulled out, the lower end of the insertion rod 11 (as when it was inserted) is also pulled out in the same way. Figure 14 The left end of the probe hole 25 interferes with a pair of protrusions 26 and 27 on the back of the probe hole 25.

[0187] Similar to the first embodiment, in the second embodiment, the inclination of the lower inclined surfaces 26b and 27b is also less than that of the upper inclined surfaces 26a and 27a. Since the inclination of the lower inclined surfaces 26b and 27b that the insert 11 contacts when it is pulled out of the insert hole 25 is set to be relatively gentle, the force Fout required to pull the insert 11 out of the insert hole 25—that is, the force required to release the engagement by moving the insert 11 over the protrusions 26 and 27—is set to be smaller. Specifically, Fout is set to be smaller than Fin. Furthermore, the measurement methods for Fin and Fout will be described later.

[0188] The other effects of the second embodiment are the same as those of the first embodiment.

[0189] (Manufacturing method of socket)

[0190] In the manufacturing methods of the socket 21 of the first and second embodiments of the present invention, injection molding using resin as a raw material is used. The manufacturing method of the socket 21 of the second embodiment will be described below, and the same method can also be applied to the socket 21 of the first embodiment (the parts of the socket body 21a and the seat bar 21b other than the second reinforcing strip 22 and the second connecting part 23).

[0191] Figure 15 It is a perspective view of a forming mold used in the manufacturing process of a socket. Figure 16(a) A side view of the first and second sliding members in the mold-opening state, viewed from the width direction. Figure 16 (b) is a front view of the first and second sliding members in the mold-open state, viewed from the surface side. Figure 16 (c) is a top view of the first slider as seen from above. Figure 17 (a) is a side view of the first and second sliding members in the mold-closed state, viewed from the width direction. Figure 17 (b) is a front view of the first and second sliding members when viewed from the surface side in the mold-closed state. Figure 18 (a) to (g) are process diagrams representing the steps of the injection molding method.

[0192] like Figure 15 As shown, the injection molding die used in this manufacturing method includes: a fixed mold 5; a movable mold 6, which is supported in a manner that allows it to reciprocate in the front-back direction relative to the fixed mold 5; and a first sliding member 7 and a second sliding member 8, which are capable of reciprocating in the vertical direction relative to the fixed mold 5.

[0193] In the closed state, the injection molding mold forms: a cavity 91, which is a space corresponding to the shape of the socket 21; a gate 92, which is a passage communicating with the cavity 91 and forms the shape of the gate resin part 92r; and a runner 93, which is a passage communicating with the gate 92.

[0194] Cavity 91 includes: a seat rod recess 21bx for forming the shape of the seat rod 21b; a socket body recess 21ax for forming the outer surface (so-called six-sided) of the socket body 21a; and protrusions (grooved protrusion 61x, insert hole protrusion 25x, sliding hole protrusion 63x) for forming the inner surface (groove 61, insert hole 25, sliding hole 63) of the socket body 21a.

[0195] The socket body recess 21ax includes: upper and lower extending wall recesses 53x, which form the outer surface of the upper and lower extending walls 53 (a portion of the side surface of the second band 31b on the left and right sides of the socket body 21a and a portion of the back surface of the socket body 21a); ​​a front side main wall recess 54x and a back side main wall recess 55x, which form the outer surfaces of the front side main wall 54 and the back side main wall 55, respectively; a mating wall recess 56x, which forms the outer surface of the mating wall 56 (a portion of the back surface and a portion of the side surface of the socket body 21a); ​​and a groove wall recess 57x, which forms the outer surface of the groove wall 57 (a portion of the side surface of the socket body 21a). Furthermore, in Figure 15 In the middle, the surface side main wall recess 54x is not shown, but the surface side main wall recess 54x is provided on the moving mold 6 in a manner opposite to the back side main wall recess 55x.

[0196] The protrusion includes: a grooved protrusion 61x for forming a groove 61; a rod hole protrusion 25x (a grooved side portion protrusion 25y and a grooved side portion protrusion 25z) for forming a rod hole 25; and a sliding hole protrusion 63x for forming a sliding hole 63.

[0197] In this embodiment, the parting line formed on the socket 21, which is the product, is located at the middle position of the entire height of the socket 21 in the front and back directions. Therefore, the fixed mold 5 and the moving mold 6 are formed with a front and back symmetrical shape. Moreover, it is formed in the following state: on the surface of the fixed mold 5 (the surface that abuts with the moving mold 6), the following are recessed: the back side main wall recess 55x, the back side upper and lower extension wall recess 53y, which is the back side half of the seat bar recess 21bx and the socket body recess 21ay, which is the back side half of the socket body recess 21ax; and the back side half of the sprue recess 93y.

[0198] Furthermore, on the surface of the fixed mold 5, a belt-mounting semi-recess 31by, which is the back half of the belt-mounting recess 31bx for mounting the second belt 31b, is formed in a recessed state that communicates with the side (opposite to the gating semi-recess 93y) of the seat bar semi-recess 21by and the upper and lower extension wall semi-recesses 53y and vertically. The depth of the belt-mounting semi-recess 31by is half the thickness of the second belt 31b. In addition, the ends of the second belt 31b that fix the chain teeth 32 are thicker in the thickness direction of the belt than the rest. In order to position this thicker part, a portion (positioning part) 31bz of the belt-mounting semi-recess 31by is formed deeper.

[0199] Furthermore, on the surface of the fixed mold 5, the first reciprocating recess 7y and the second reciprocating recess 8y, which are used to move the back half of the first sliding member 7 and the second sliding member 8 that are reciprocating, are formed to be vertically connected and also connected to the socket body semi-recess 21ay. More specifically, the first reciprocating recess 7y and the second reciprocating recess 8y are formed to be connected to the opposite side of the loading semi-recess 31by in the left-right direction of the socket body semi-recess 21ay.

[0200] The first reciprocating recess 7y is formed such that it communicates with the upper and lower extending wall recess 53y on the opposite side of the carrying semi-recess 31by, and communicates with the back main wall recess 55x below.

[0201] The second reciprocating recess 8y is formed at a distance from the seat rod semi-recess 21by on the opposite side of the carrying semi-recess 31by. More specifically, the second reciprocating recess 8y is formed on the side of the wall 21bz opposite to the carrying semi-recess 31by in the left and right walls constituting the seat rod semi-recess 21by. In addition, the second reciprocating recess 8y is formed to communicate with the back main wall recess 55x in the socket body semi-recess 21ay on the upper and side sides (opposite to the upper and lower extending wall semi-recesses 53y).

[0202] Furthermore, the moving mold 6 and the fixed mold 5 are symmetrical in shape, and therefore, the surface of the moving mold 6 (the surface that mates with the fixed mold 5) has the surface half of the main wall recess 54x, the surface half of the upper and lower extension wall recess 53x, the surface half of the seat bar recess 21bx, the surface half of the carrier recess 31bx and the surface half of the sprue 93.

[0203] The first slider 7 includes: a first base portion 71, which forms the lower surface side of the socket body 21a and mainly forms the lower surface of the engagement wall 56 (more specifically, the end of the insertion hole 25 side of the lower surface side of the upper and lower extension walls 53 and the engagement wall 56); a first slider body portion 72, which protrudes upward from the side of the upper surface of the first base portion 71 in the left-right direction with the loading semi-recessed portion 31by; and a first side forming portion 73, which forms the side of the socket body 21a and is the side of the engagement wall 56 (the side with the groove 61), protruding upward from the first base portion 71.

[0204] The first sliding member main body 72 includes: a sliding hole protrusion 63x for forming a sliding hole 63, which is a vertically extending rod-shaped portion protruding upward from the first base portion 71; and a reverse groove side portion protrusion 25y for forming a portion of the insertion rod hole protrusion 25x opposite to the groove 61, which protrudes upward from the sliding hole protrusion 63x. The upper end face of the reverse groove side portion protrusion 25y is abutting against the wall 21bz opposite to the side of the half-recess 31by of the left and right walls constituting the seat rod half-recess 21by.

[0205] The reverse groove side portion protrusion 25y includes: a first base portion 25ya, which is connected to the sliding hole protrusion 63x and extends upward; and a first top portion 25yb, which is connected to the first base portion 25ya and extends upward.

[0206] The first base 25ya is obtained by extending the upper end of the sliding hole protrusion 63x upward as a whole. Therefore, the first base 25ya is a rod with a rectangular cross-section that is approximately the same as the cross-section of the sliding hole protrusion 63x.

[0207] The first top portion 25yb is a rod-shaped portion with a rectangular cross-section. It extends upwards from the portion of the upper end of the first base portion 25ya, specifically from the side of the second band 31b (the side of the band-mounting recess 31bx for mounting the second band 31b). Therefore, the thickness of the first top portion 25yb in the front / back direction is equal to the thickness of the first base portion 25ya in the front / back direction, and the width of the first top portion 25yb in the left / right direction is smaller than the width of the first base portion 25ya in the left / right direction. Therefore, the protrusion 25y on the reverse band groove side is formed into a stepped rod shape by the first base portion 25ya, which has a larger left / right width, and the first top portion 25yb, which has a smaller left / right width.

[0208] Furthermore, a first recess 26x is provided on the first strip 31a side (gating 93 side) at the upper end of the first base 25ya. The first recess 26x is concave towards the back side and together with the second recess 26y described later, it is used to form the surface protrusion 26.

[0209] The first recess 26x is used to form the lower half of the surface-side protrusion 26 and has a shape corresponding to the lower half of the surface-side protrusion 26. That is, the bottom surface of the first recess 26x includes: a lower inclined surface forming portion 26bx, which is used to form the lower inclined surface 26b of the surface-side protrusion 26, and the depth of the first recess 26x in the surface-back direction increases as it is inclined upward from the lower end of the first recess 26x; and a parallel surface lower half forming portion 26cxa, which is used to form the lower half of the parallel surface 26c of the surface-side protrusion 26, and is parallel to the vertical direction and the width direction. The upper edge 28x of the lower half of the parallel surface forming portion 26cxa is a conical surface that faces upward toward the side of the second belt 31b (the side of the belt mounting recess 31bx for mounting the second belt 31b), and this conical surface is the surface that contacts the conical surface of the lower edge 28y of the upper half of the parallel surface forming portion 26cxb, which will be described later.

[0210] The second slider 8 includes: a second base portion 81, which forms the upper surface side of the socket body 21a and is the side closer to the groove 61 than the upper and lower extension walls 53; a groove-side protrusion 25z, which forms the groove 61 side of the insertion rod hole protrusion 25x in the left-right direction; and a second side forming portion 83, which forms the side of the groove wall 57 in the side of the grooved protrusion 61x and the side of the socket body 21a. The second slider body portion 82 is formed by the groove-side protrusion 25z and the grooved protrusion 61x. Moreover, in the left-right direction, from the side of the insertion rod recess 21bx toward the opposite side (the gating 93 side), the groove-side protrusion 25z, the grooved protrusion 61x, and the second side forming portion 83 protrude downward from the lower surface of the second base portion 81. The lower end faces of the groove-side protrusion 25z, the grooved protrusion 61x, and the second side forming portion 83 are flush planes that are straight in the left-right direction.

[0211] The groove-side protrusion 25z includes: a second base 25za that extends downward from the lower surface of the second base portion 81; and a second top portion 25zb that connects to the second base 25za and extends downward.

[0212] The second base portion 25za is a rod-shaped portion with a rectangular cross-section. The second top portion 25zb is also a rod-shaped portion with a rectangular cross-section, and it is formed by extending downward from the portion of the lower end of the second base portion 25za, not entirely from the lower end of the second base portion 25za, but from the portion of the lower end of the second base portion 25za on the side of the first strip 31a (sprue 93 side). Therefore, the thickness of the second top portion 25zb in the back-side direction is equal to the thickness of the second base portion 25za in the back-side direction, but the width of the second top portion 25zb in the left-right direction is smaller than the width of the second base portion 25za in the left-right direction. Therefore, the groove-side protrusion 25z is formed into a stepped rod shape by the second base portion 25za, which has a larger width in the left-right direction, and the second top portion 25zb, which has a smaller width in the left-right direction.

[0213] Furthermore, a second recess 26y is provided on the side of the second belt 31b (the side of the belt mounting recess 31bx for mounting the second belt 31b) at the lower end of the second base 25za. The second recess 26y is concave towards the back side and together with the first recess 26x described above, it is used to form the surface protrusion 26.

[0214] The second recess 26y is used to form the upper half of the face-side protrusion 26 and has a shape corresponding to the upper half of the face-side protrusion 26. That is, the bottom surface of the second recess 26y includes: an upper inclined surface forming portion 26ax, which is used to form the upper inclined surface 26a of the face-side protrusion 26, and the depth of the second recess 26y in the face-back direction increases as it is inclined downward from the upper end of the first recess 26x; and a parallel surface upper half forming portion 26cxb, which is used to form the upper half of the parallel surface 26c of the face-side protrusion 26 and is parallel to the vertical direction and the width direction. The lower edge 28y of the upper half forming portion 26cxb on the parallel surface is a conical surface that faces downward toward the side of the first belt 31a (opposite to the belt-carrying recess 31bx used to carry the second belt 31b), and this conical surface is the surface that contacts the conical surface of the upper edge 28x of the lower half forming portion 26cxa on the parallel surface.

[0215] like Figure 17 As shown, in the mold closed state, the second belt side 31b side (belt placement recess 31bx side) of the groove side portion protrusion 25z and the first belt 31a side (sprue 93 side) of the reverse belt groove side portion protrusion 25y make surface contact, and the groove side portion protrusion 25z and the reverse belt groove side portion protrusion 25y constitute the insert hole protrusion 25x for forming the insert hole 25.

[0216] Furthermore, in Figure 17In the states shown in (a) to (b), the lower edge 28y of the upper half forming portion 26cxb of the parallel surface and the upper edge 28x of the lower half forming portion 26cxa of the parallel surface make surface contact, and the first recess 26x of the groove side portion convex portion 25y and the second recess 26y of the groove side portion convex portion 25z are joined in the vertical direction to form the surface side convex portion forming portion 26z for forming the surface side convex portion 26.

[0217] The surface protrusion forming portion 26z, including the first recess 26x and the second recess 26y, has a shape corresponding to the surface protrusion 26. Therefore, corresponding to the fact that the inclination of the upper inclined surface 26a of the surface protrusion 26 is greater than the inclination of the lower inclined surface 26b, the inclination of the upper inclined surface forming portion 26ax of the second recess 26y is greater than the inclination of the lower inclined surface forming portion 26bx of the first recess 26x.

[0218] In addition, Figures 15-17 In (b), only the front surfaces of the first slider 7 and the second slider 8 are shown, therefore only the first recess 26x and the second recess 26y of the front surface protrusion forming portion 26z for forming the front surface protrusion 26 are described. However, the first slider 7 and the second slider 8 have a front-back symmetrical shape, and a back surface protrusion forming portion for forming the back surface protrusion 27 is provided on the back surface of the first slider 7 and the second slider 8. The back surface protrusion forming portion includes: a recess (not shown) which is provided on the back surface of the reverse groove side portion protrusion 25y in a front-back symmetrical manner with the first recess 26x; and a recess (not shown) which is provided on the back surface of the groove side portion protrusion 25z in a front-back symmetrical manner with the second recess 26y. During mold closing, this pair of recesses (not shown) meet in the vertical direction to form the back surface protrusion forming portion for forming the back surface protrusion 27. The detailed structure of the back-side protrusion forming part is applicable to the above-described front-side protrusion forming part 26z, so it is omitted.

[0219] Furthermore, the grooved protrusion 25z, the grooved protrusion 61x, and the second side forming portion 83 each form a spatial portion on the back of the grooved protrusion 61x that corresponds to the shape of the groove wall 57. Therefore, the grooved protrusion 61x is formed such that its height differs from that of the grooved protrusion 25z and the second side forming portion 83 in the back of the watch. In other words, the grooved protrusion 61x is positioned at the midpoint of the entire height of the back of both the grooved protrusion 25z and the second side forming portion 83.

[0220] In addition, such as Figure 15 and Figure 16As shown in (a) to (c), a gate 92 is formed on the surface where the first side forming portion 73 and the second side forming portion 83 meet. The gate 92 extends in the left-right direction, and the inlet and outlet portions of the molten resin in the gate 92 are formed with different shapes (in the illustrated example, the inlet portion is circular and the outlet portion is rectangular). Furthermore, in the inlet portion of the molten resin in the gate 92, a recessed inlet recess 92x, corresponding to half the shape of the inlet portion, is formed on both the first side forming portion 73 and the second side forming portion 83. In the outlet portion of the molten resin in the gate 92, a recessed outlet recess 92y is formed only on the first side forming portion 73, and the second side forming portion 83 has a plane 92z that closes the outlet recess 92y (see reference). Figure 16 (a) to (c) and Figure 17 (a)~(b)).

[0221] In the case of Figure 17 In the closed state of the injection molding mold shown in (a) to (b), the moving mold 6 is connected to the fixed mold 5, and the first sliding member 7, which is in a state of moving upward, is connected to the fixed mold 5. The second sliding member 8, which is in a state of moving downward, is connected to the first sliding member 7. Furthermore, by connecting the first sliding member 7 to the second sliding member 8, the space portion 56s of the joint wall corresponding to the shape of the joint wall 56 is composed of the first sliding member 7 (the sliding hole protrusion 63x of the first sliding member main body 72, the first base portion 71, and the first side forming portion 73) and the second sliding member 8 (the groove side portion protrusion 25z of the insert hole protrusion 25x and the lower end face of the grooved protrusion 61x in the second sliding member 8). Furthermore, the space portion 56s for the joint wall is a space portion whose shape corresponds to the groove closing portion 56a and the hole closing portion 56b of the joint wall 56. It is a closed space portion in the cavity 91 whose shape corresponds to the following portion: the portion that closes the lower part of the portion with groove 61 in the insertion hole 25 and the lower part of the groove 61.

[0222] An embodiment of the molding method for the socket 21 using the above-described injection molding die will be described.

[0223] (1) First, as Figure 18 As shown in (a), the injection molding mold is in the open state. Then, as... Figure 18 As shown in (b), the process of placing the second belt 31b onto the fixed mold 5 is performed. Specifically, one end of the second belt 31b in the left-right direction is placed onto the positioning part 31bz of the belt placement recess 31bx in the fixed mold 5 (see reference). Figure 15 Positioning is performed. Thus, one side of the second band 31b in the width direction is positioned on the cavity 91 side, and the other side in the width direction is positioned on the side away from the cavity 91.

[0224] At this point, in this embodiment, as Figure 15 and Figure 16 As shown in (a) to (c), the first slider 7 is configured to retract to a position lower than the back side main wall recess 55x (return to movement state), and the second slider 8 is configured to retract to a position higher than the back side main wall recess 55x (return to movement state).

[0225] (2) Next, as Figure 18 As shown in (c), a mold closing process is performed. Specifically, the moving mold 6 is moved forward relative to the fixed mold 5 in the front-back direction, causing the two molds 5 and 6 to mate. Furthermore, based on this forward movement, the first sliding member 7 and the second sliding member 8 are moved forward in the vertical direction (the first sliding member 7 moves upward, and the second sliding member 8 moves downward), so as to... Figure 15 and Figure 16 The states shown in (a) to (c) become Figure 17 In the states shown in (a) to (b), the lower end face of the upper and lower extension wall recesses 53x of the seat bar recess 21bx of the fixed mold 5 is brought into contact with the upper end face of the seat bar recess 21bx of the first sliding member 7, and the lower end face of the second side forming portion 83 in the second sliding member 8 is brought into contact with the upper end face of the first side forming portion 73 in the first sliding member 7. Thus, the cavity 91, gate 92, and runner 93 are formed and connected to each other to allow molten resin to pass through. Furthermore, at this time, the reverse groove side protrusion 25y in the first sliding member 7 and the groove side protrusion 25z in the second sliding member 8 are in left-right surface contact, forming the insert hole protrusion 25x. Additionally, using... Figure 17 In (a) to (b), as described above, the lower edge 28y of the upper half forming portion 26cxb on the parallel surface and the conical surface of the upper edge 28x of the lower half forming portion 26cxa on the parallel surface make surface contact, thereby causing the first recess 26x of the groove-side portion convex portion 25y and the second recess 26y of the groove-side portion convex portion 25z to align in the vertical direction, thus forming a surface-side convex portion forming portion 26z for forming the surface-side convex portion 26. Similarly, although not shown, it forms a back-side convex portion forming portion for forming the back-side convex portion 27.

[0226] Furthermore, the forward movement of the first slider 7 and the second slider 8 can be achieved, for example, by utilizing a structure in which a corner protrudes from one of the fixed mold 5 and the moving mold 6 toward the other mold, and a guide hole formed on the other mold to guide the corner, or by driving a dedicated electric motor. When the first slider 7 and the second slider 8 reciprocate using a dedicated electric motor, it is not necessary to drive the dedicated electric motor at the same time as the mold closing process; the dedicated electric motor can be driven before or after the mold closing process.

[0227] (3) Next, as Figure 18 As shown in (c), an injection molding process is performed where molten resin is injected. The molten resin is injected into the cavity 91 through the runner 93 and gate 92. The molten resin then enters the joint wall space 56s (closed space) from the gate 92, and immediately collides with the first slider 7 (more specifically, the sliding hole protrusion 63x of the first slider body 72). After the collision, the molten resin is forced to change its direction of travel, moving in a manner that forms the front main wall 54 and the back main wall 55. Then, as... Figure 18 As shown in (d), molten resin is filled into the cavity 91. Furthermore, the impact surface of the sliding hole protrusion 63x is, in the illustrated example, a surface orthogonal to the left-right direction.

[0228] (4) After a specified time following injection molding, the resin cools to a degree that sufficiently maintains the shape, and then... Figure 18 The mold opening process is performed as shown in (e). Specifically, the moving mold 6 is moved back to its original position. In addition, when the corner pin is used, the first sliding member 7 and the second sliding member 8 move back to their original positions simultaneously with the moving mold 6; or when the corner pin is not used, a dedicated motor is driven so that the first sliding member 7 and the second sliding member 8 move back to their original positions simultaneously with the moving mold 6, either upward or downward.

[0229] (5) Then, as Figure 18 of (f), Figure 18 As shown in (g), the sprue resin portion 93r filled in the sprue 93 and the gate resin portion 92r filled in the gate 92 are cut from the socket 21, which is the product, and the socket 21, which is the product, is demolded from the fixed mold 5 and recycled by the ejector pin.

[0230] As described above, in the socket 21 manufactured in this way, the inclination of the upper inclined surfaces 26a and 27a that the plug 11 contacts when inserted into the plug hole 25 is set to be relatively steep, while the inclination of the lower inclined surfaces 26b and 27b that the plug 11 contacts when withdrawn from the plug hole 25 is set to be relatively gentle. Therefore, the force Fin required to insert the plug 11 into the plug hole 25 is greater than the force Fout required to withdraw the plug 11 from the plug hole 25. The measurement methods for forces Fin and Fout will be explained below.

[0231] (Method for measuring the force Fin required to insert the insert rod into the insert rod hole)

[0232] The force Fin required to insert the insert 11 into the insert hole 25, i.e. the force Fin required to make the insert 11 pass over the protrusions 26 and 27 and engage, is measured using the following method.

[0233] The zipper 100 of the first and second embodiments is disassembled, resulting in a pair of first zipper tooth straps 30A and second zipper tooth straps 30B. The insert rod 11 is then inserted into the insert rod hole 25 of the socket 21, and the insertion strength (insertion resistance) is measured. The insertion strength is measured using a tensile testing machine manufactured by INSTRON Corporation. The first strap 31a with the insert rod 11 and the second strap 31b with the socket 21 are clamped, and at least one of the first strap 31a and the second strap 31b is pulled such that the insert rod 11 is inserted into the insert rod hole 25 of the socket 21. The strength (insertion resistance) is measured at this time. At this time, the zipper head 40 is pre-positioned at the lowest position contacting the socket body 21a, so that when at least one of the first strap 31a and the second strap 31b is pulled, the insert rod 11 can be inserted into the insert rod hole 25 via the zipper head 40.

[0234] Figure 19 This is a graph illustrating an example of the relationship between the insertion distance (horizontal axis) of the insertion rod 11 relative to the insertion rod hole 25 and the insertion resistance (vertical axis). There may be multiple peaks in the insertion resistance, but the first peak generated from the start of insertion is used as the peak value. This is because this first peak represents the peak value generated when the insertion rod 11 passes over the protrusions 26 and 27.

[0235] After the first peak value is exceeded, the insertion resistance decreases because the recesses 16 and 17 of the insert 11 engage with the protrusions 26 and 27 of the insert hole 25 after the insert 11 passes the protrusions 26 and 27. Furthermore, a second peak value is obtained after the first peak value, but this second peak value is generated when the lower end of the insert 11 contacts the hole closure portion 56b of the engagement wall 56 during further continuous insertion after the recesses 16 and 17 of the insert 11 engage with the protrusions 26 and 27 of the insert hole 25. Therefore, this value is not used as the peak value of the insertion resistance.

[0236] Figure 19 The peak value of the example shown is 4.14 N, which is within the preferred range of 4 N to 6 N mentioned above. As long as the peak value is within the range of 4 N to 6 N, it is an appropriate force for inserting the plug 11 into the plug hole 25. Therefore, the user can obtain a clicking or snapping insertion feeling by feeling the resistance or sound when the plug 11 passes over the protrusions 26 and 27, and thus be properly aware that the plug 11 has been fully inserted into the socket 21.

[0237] Conversely, if the peak value exceeds 6N, the insertion resistance is too high, requiring the user to exert significant force to insert the insertion rod 11 into the insertion rod hole 25, which is not preferable. Furthermore, there is a possibility that the user might mistakenly believe that the insertion rod 11 has reached the lowest point of the insertion rod hole 25 when it comes into contact with the protrusions 26 and 27 before passing them, thus mistakenly believing that insertion is complete.

[0238] On the other hand, when the peak resistance is less than 4N, the insertion resistance is too low, and the user cannot obtain a proper insertion or click sensation.

[0239] (Method for measuring the force Fout required to pull the insert rod out of the insert rod hole)

[0240] The force Fout required to pull the insert 11 out of the insert hole 25, that is, the force Fout required to release the insert 11 from the protrusions 26 and 27, is measured using the following method.

[0241] With the first zipper tooth tape 30A and the second zipper tooth tape 30B combined, the insertion rod 11 was pulled out of the insertion rod hole 25 of the socket 21, and the pulling strength (pulling resistance) was measured. The pulling strength was measured using a tensile testing machine manufactured by INSTRON Corporation. The first tape 31a, on which the insertion rod 11 is attached, and the pull tab 42 of the zipper head 40 were clamped. The strength (pulling resistance) was measured when at least one of the first tape 31a and the pull tab 42 of the zipper head 40 was pulled to pull the insertion rod 11 out of the insertion rod hole 25 of the socket 21. At this time, the zipper head 40 was pre-positioned at the lowest position contacting the socket body 21a, so that the insertion rod 11 could be pulled out of the insertion rod hole 25 via the zipper head 40 when at least one of the first tape 31a and the pull tab 42 of the zipper head 40 was pulled.

[0242] Figure 20 This is an example graph showing the relationship between the withdrawal distance (horizontal axis) of the insertion rod 11 relative to the insertion rod hole 25 and the withdrawal resistance (vertical axis). The peak value of the withdrawal resistance in this graph is used as the force Fout required to withdraw the insertion rod 11 from the insertion rod hole 25.

[0243] Furthermore, the present invention is not limited to the above-described embodiments, and appropriate changes and improvements can be made within the scope of implementation.

[0244] As stated above, the following matters are disclosed in this specification.

[0245] (1) A zipper, the zipper 100 comprising:

[0246] A pair of first and second zipper tooth straps 30A and 30B, comprising first zipper tooth strap 30A and second zipper tooth strap 30B;

[0247] At least one zipper pull 40 for opening and closing between the first zipper chain strap 30A and the second zipper chain strap 30B; and

[0248] The separating insert 1 is disposed at the lower end of the first zipper tooth strip 30A and the second zipper tooth strip 30B along their length.

[0249] The separation insert 1 includes:

[0250] The first separation insert 10 is disposed on the first zipper tooth tape 30A; and

[0251] The second separation insert 20 is disposed on the second zipper tooth tape 30B and can be connected to or disconnected from the first separation insert 10.

[0252] The first separating insert portion 10 has an insert rod 11, which is disposed on the inner edge side of the first zipper tooth tape 30A in the width direction.

[0253] The second separating insert portion 20 has a socket 21, which is disposed on the inner edge side of the second zipper tooth belt 30B in the width direction.

[0254] The socket 21 has a plug hole 25 that opens upwards, allowing the plug 11 to be inserted and removed along its length.

[0255] At least one of the surface 11b and the back surface 11c of the insertion rod 11 is provided with a recess 16 or 17.

[0256] At least one of the surface side 25a and back side 25b, which are opposite to the surface 11b and back side 11c of the plug hole 25 constituting the socket 21, is provided with a protrusion 26 or 27 that can engage with the recess 16 or 17.

[0257] The protrusions 26 and 27 are asymmetrical in shape with respect to the plane (P) perpendicular to the insertion direction of the insert rod 11 and passing through the center of the protrusions 26 and 27.

[0258] The protrusions 26 and 27 include: upper inclined surfaces 26a and 27a, which increase in thickness as the upper ends of the protrusions 26 and 27 move downwards from the insertion / removal direction of the insertion rod 11; and lower inclined surfaces 26b and 27b, which increase in thickness as the lower ends of the protrusions 26 and 27 move upwards from the insertion / removal direction of the insertion rod 11.

[0259] The inclination of the upper inclined surfaces 26a and 27a is greater than the inclination of the lower inclined surfaces 26b and 27b.

[0260] According to this structure, since a large force is required to fully insert the plug 11 into the plug hole 25, the user can obtain a sense of insertion or a clicking sensation by the resistance or sound when the plug 11 passes over the protrusions 26 and 27, and can appropriately realize that the plug 11 has been fully inserted into the socket 21.

[0261] (2) In the zipper described in (1), the force Fin required to insert the insert 11 into the insert hole 25 is greater than the force Fout required to pull the insert 11 out of the insert hole 25.

[0262] According to this structure, a large force is required to fully insert the plug 11 into the plug hole 25. Therefore, the user can obtain a sense of insertion or a clicking sensation by the resistance or sound when the plug 11 passes over the protrusions 26 and 27, and can appropriately realize that the plug 11 has been fully inserted into the socket 21.

[0263] (3) In the zipper described in (1) or (2), the force required to insert the insert 11 into the insert hole 25 is 4N to 6N.

[0264] According to this structure, a large force is required to fully insert the plug 11 into the plug hole 25. Therefore, the user can obtain a sense of insertion or a clicking sensation by the resistance or sound when the plug 11 passes over the protrusions 26 and 27, and can appropriately realize that the plug 11 has been fully inserted into the socket 21.

[0265] (4) In any of the zippers described in (1) to (3), the recesses 16 and 17 are respectively provided on the surface 11b and the back surface 11c of the insert 11.

[0266] The protrusions 26 and 27 are respectively disposed on the front side 25a and the back side 25b of the insertion hole 25 of the socket 21.

[0267] According to this structure, the force Fin required to engage the protrusions 26, 27 with the recesses 16, 17 is increased, so the user can more reliably obtain the insertion or click sensation and can further and appropriately realize that the plug 11 has been fully inserted into the socket 21.

[0268] (5) In any of the zippers described in (1) to (4), the protrusions 26 and 27 have parallel surfaces 26c and 27c, which connect the upper inclined surfaces 26a and 27a and the lower inclined surfaces 26b and 27b, and are parallel to the insertion / removal direction and the width direction.

[0269] According to this structure, the protrusions 26 and 27 have parallel surfaces 26c and 27c, which connect the upper inclined surfaces 26a and 27a and the lower inclined surfaces 26b and 27b. They are parallel to the insertion and removal direction (vertical direction) and width direction (horizontal direction) of the insertion rod 11, thus enabling the protrusions 26 and 27 and the recesses 16 and 17 to engage in a manner that reduces wobbling.

[0270] (6) In any of the zippers described in (1) to (5), the recesses 16 and 17 penetrate the insert 11 in the width direction.

[0271] According to this structure, even if dirt or dust such as clothing fibers enter the recesses 16 and 17, they can be easily discharged from the recesses 16 and 17 in the width direction.

[0272] (7) In any of the zippers described in (1) to (6), the length M1 of the recesses 16 and 17 in the width direction is greater than the length M2 of the protrusions 26 and 27 in the width direction.

[0273] This structure allows the protrusions 26 and 27 to easily engage with the recesses 16 and 17. For example, it is possible that the insert 11 is inserted into the insert hole 25 at an angle in the width direction (left-right direction), but even in this case, the recesses 16 and 17 of the insert can reliably engage with the protrusions 26 and 27 of the insert hole 25. Furthermore, even when the protrusions 26 and 27 are in contact with the recesses 16 and 17 after engagement, the elastic deformation of the protrusions 26 and 27 within the recesses 16 and 17 in the width direction prevents the generation of local stress on the protrusions 26 and 27.

[0274] (8) In any of (1) to (7) the zipper, when the recesses 16, 17 engage with the protrusions 26, 27, the gap between the recesses 16, 17 and the protrusions 26, 27 in the width direction is greater than the gap between the recesses 16, 17 and the protrusions 26, 27 in the insertion / removal direction.

[0275] According to this structure, an insertion sensation can be obtained when the recesses 16 and 17 engage with the protrusions 26 and 27, and the protrusions 26 and 27 can be easily inserted into the recesses 16 and 17.

[0276] (9) A zipper, the zipper 100 comprising:

[0277] A pair of first and second zipper tooth straps 30A and 30B, comprising first zipper tooth strap 30A and second zipper tooth strap 30B;

[0278] At least one zipper pull 40 for opening and closing between the first zipper chain strap 30A and the second zipper chain strap 30B; and

[0279] The separating insert 1 is disposed at the lower end of the first zipper tooth strip 30A and the second zipper tooth strip 30B along their length.

[0280] The separation insert 1 includes:

[0281] The first separation insert 10 is disposed on the first zipper tooth tape 30A; and

[0282] The second separation insert 20 is disposed on the second zipper tooth tape 30B and can be connected to or disconnected from the first separation insert 10.

[0283] The first separating insert portion 10 has an insert rod 11, which is disposed on the inner edge side of the first zipper tooth tape 30A in the width direction.

[0284] The second separating insert portion 20 has a socket 21, which is disposed on the inner edge side of the second zipper tooth belt 30B in the width direction.

[0285] The socket 21 has a plug hole 25 that opens upwards, allowing the plug 11 to be inserted and removed along its length.

[0286] At least one of the surface 11b and the back surface 11c of the insertion rod 11 is provided with a recess 16 or 17.

[0287] At least one of the surface side 25a and back side 25b, which are opposite to the surface 11b and back side 11c of the plug hole 25 constituting the socket 21, is provided with a protrusion 26 or 27 that can engage with the recess 16 or 17.

[0288] The force Fin required to insert the plug into the plug hole 25 of the socket is greater than the force Fout required to pull the plug out of the plug hole 25 of the socket.

[0289] According to this structure, a large force is required to fully insert the plug 11 into the plug hole 25. Therefore, the user can obtain a sense of insertion or a clicking sensation by the resistance or sound when the plug 11 passes over the protrusions 26 and 27, and can appropriately realize that the plug 11 has been fully inserted into the socket 21.

[0290] (10) A method for manufacturing a socket 21 of a zipper insert 1, characterized in that it includes:

[0291] In the socket 21, a process of providing protrusions 26 and 27 on the inner surfaces 25a and 25b of the plug hole 25 that allows the plug 11 to be inserted and removed.

[0292] The process of injection molding to obtain the socket 21 using a fixed mold 5, a movable mold 6 configured to reciprocate in the front-back direction relative to the fixed mold 5, and a first sliding member 7 and a second sliding member 8 configured to reciprocate in the vertical direction relative to the fixed mold 5; and

[0293] The process of forming a protrusion forming portion 26z for forming the protrusions 26 and 27 by engaging the first recess 26x recessed in the first slider 7 and the second recess 26y recessed in the second slider 8.

[0294] According to this structure, protrusions 26 and 27 can be provided on the inner surfaces 25a and 25b of the insertion hole 25 of the socket 21 by injection molding.

Claims

1. A zipper, characterized in that, The zipper (100) includes: A pair of first and second zipper tooth straps (30A, 30B), comprising a first zipper tooth strap (30A) and a second zipper tooth strap (30B); At least one zipper pull (40) for opening and closing between the first zipper chain strap (30A) and the second zipper chain strap (30B); and A separation insert (1) is disposed at the lower end of the first zipper tooth strip (30A) and the second zipper tooth strip (30B) along their length. The separate insert (1) includes: A first separation insert (10) is disposed on the first zipper tooth belt (30A); and The second separation insert (20) is disposed on the second zipper tooth belt (30B) and can be connected to or disconnected from the first separation insert (10). The first separating insert (10) has an insert (11) which is disposed on the inner edge side of the first zipper tooth tape (30A) in the width direction. The second separate insert (20) has a socket (21) which is located on the inner edge side of the second zipper tooth tape (30B) in the width direction. The socket (21) has a plug hole (25) that opens upwards, allowing the plug (11) to be inserted and removed along its length. At least one of the surface (11b) and back (11c) of the insert (11) is provided with a recess (16, 17). At least one of the front side (25a) and back side (25b) opposite to the surface (11b) and back side (11c) of the plug hole (25) constituting the socket (21) is provided with a protrusion (26, 27) that can engage with the recess (16, 17). The protrusions (26, 27) are asymmetrical in shape relative to the central portion of the protrusions (26, 27) in the insertion / removal direction passing through the insertion rod (11) and to the plane (P) perpendicular to the insertion / removal direction. The protrusions (26, 27) include: upper inclined surfaces (26a, 27a) that increase in thickness as the upper end of the protrusions (26, 27) faces downward in the insertion / removal direction of the insert (11); and lower inclined surfaces (26b, 27b) that increase in thickness as the lower end of the protrusions (26, 27) faces upward in the insertion / removal direction of the insert (11). The inclination of the upper inclined surface (26a, 27a) is greater than the inclination of the lower inclined surface (26b, 27b).

2. The zipper according to claim 1, characterized in that: The force required to insert the plug (11) into the plug hole (25) is greater than the force required to pull the plug (11) out of the plug hole (25).

3. The zipper according to claim 1 or 2, characterized in that: The force required to insert the insert (11) into the insert hole (25) is 4N to 6N.

4. The zipper according to claim 1 or 2, characterized in that: The recesses (16, 17) are respectively provided on the surface (11b) and the back surface (11c) of the insert (11). The protrusions (26, 27) are respectively provided on the front side (25a) and the back side (25b) of the plug hole (25) of the socket (21).

5. The zipper according to claim 1 or 2, characterized in that: The protrusions (26, 27) have parallel surfaces (26c, 27c) that connect the upper inclined surfaces (26a, 27a) and the lower inclined surfaces (26b, 27b) and are parallel to the insertion / removal direction and the width direction.

6. The zipper according to claim 1 or 2, characterized in that: The recesses (16, 17) penetrate the insert (11) in the width direction.

7. The zipper according to claim 1 or 2, characterized in that: The length (M1) of the recess (16, 17) in the width direction is greater than the length (M2) of the protrusion (26, 27) in the width direction.

8. The zipper according to claim 1 or 2, characterized in that: When the recess (16, 17) and the protrusion (26, 27) are engaged, the gap between the recess (16, 17) and the protrusion (26, 27) in the width direction is greater than the gap between the recess (16, 17) and the protrusion (26, 27) in the insertion / removal direction.

9. A zipper, characterized in that, The zipper (100) includes: A pair of first and second zipper tooth straps (30A, 30B), comprising a first zipper tooth strap (30A) and a second zipper tooth strap (30B); At least one zipper pull (40) for opening and closing between the first zipper chain strap (30A) and the second zipper chain strap (30B); and A separation insert (1) is disposed at the lower end of the first zipper tooth strip (30A) and the second zipper tooth strip (30B) along their length. The separate insert (1) includes: A first separation insert (10) is disposed on the first zipper tooth belt (30A); and The second separation insert (20) is disposed on the second zipper tooth belt (30B) and can be connected to or disconnected from the first separation insert (10). The first separating insert (10) has an insert (11) which is disposed on the inner edge side of the first zipper tooth tape (30A) in the width direction. The second separate insert (20) has a socket (21) which is located on the inner edge side of the second zipper tooth tape (30B) in the width direction. The socket (21) has a plug hole (25) that opens upwards, allowing the plug (11) to be inserted and removed along its length. At least one of the surface (11b) and back (11c) of the insert (11) is provided with a recess (16, 17). At least one of the front side (25a) and back side (25b) opposite to the surface (11b) and back side (11c) of the plug hole (25) constituting the socket (21) is provided with a protrusion (26, 27) that can engage with the recess (16, 17). The force required to insert the plug into the plug hole (25) of the socket is greater than the force required to pull the plug out of the plug hole (25) of the socket.

10. A method for manufacturing a socket (21) for a zipper detachable insert (1) as described in any one of claims 1 to 9, characterized in that, include: In the socket (21), a process of providing a protrusion (26, 27) on at least one of the front side (25a) and back side (25b) of the plug hole (25) for inserting and removing the plug (11); The socket (21) is obtained by injection molding using a fixed mold (5), a moving mold (6) configured to reciprocate in the face-back direction relative to the fixed mold (5), and a first sliding member (7) and a second sliding member (8) configured to reciprocate in the up-down direction relative to the fixed mold (5); and The process of forming a protrusion forming portion (26z) for forming the protrusions (26, 27) by engaging the first recess (26x) recessed in the first slider (7) and the second recess (26y) recessed in the second slider (8).

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