JP3215771U - buckle - Google Patents

Abstract

A buckle capable of reducing the possibility of disengagement of a male member and a female member by an operation unintended by a user. The buckle includes a male member having an engagement protrusion and a female member having an engagement hole capable of receiving the engagement protrusion from an opening. The engagement protrusion 20 includes a head on the protruding end side and a small diameter portion having a smaller diameter than the head. The female member includes a stop. The restraining tool has a pair of engaging portions that are in proximity to or in contact with the small-diameter portion of the engaging protrusion 20 received in the engaging hole in the initial state and take a locking position that makes it impossible to remove the head from the engaging hole; And an operating portion for elastically displacing the pair of engaging portions from the locking position to a non-locking position that allows the head to be removed from the engagement hole. The male member 10 and the female member can rotate around the engaging protrusion 20 in a state where the engaging protrusion 20 is locked by the pair of engaging portions in the engaging hole. A convex portion 24 that protrudes in the radial direction is provided on the peripheral surface of the head, and a concave portion that is recessed in the radial direction that allows passage of the convex portion 24 is provided on the peripheral surface of the opening. [Selection] Figure 4

Description

  The present invention relates to a buckle, and more particularly, to a buckle used for connecting a belt (including a strap, a string, etc.) such as a strap, a child seat, a rucksack, and a backpack.

  For example, a buckle of a type in which the engagement protrusion of the male member is inserted into the engagement hole of the female member, and the engagement protrusion in the engagement hole can be locked and unlocked by a restraining tool accommodated in the female member. International Publication No. 2014/102905 (Patent Document 1), Utility Model Registration No. 327689 (Patent Document 2), and the like. In this type of buckle, the male member and the female member are brought into an engaged state by engaging the engagement protrusion of the male member within the engagement hole of the female member by the pair of engaging portions of the restraining tool. In this engaged state, the male member and the female member can rotate relative to each other about the engaging protrusion. When releasing the engagement state, the user pushes the operation part of the restraining tool protruding from the female member, so that the engagement protrusions are unlocked by the pair of engagement parts. It becomes possible to release from the engagement hole.

  Since the above-mentioned buckle can be rotated with each other when the male member and the female member are engaged, the male member and the female member can flexibly follow the movement of the belt connected to each of the male member and the female member. . Due to such mobility, the buckle is used for a strap that requires flexible follow-up to the movement of the body. However, if the child accidentally touches the operation part of the buckle while using the strap, the male member and the female member may be disengaged regardless of the user's intention.

International Publication No. 2014/102905 Pamphlet Utility Model Registration No. 327689 Specification

  Accordingly, an object of the present invention is to provide a buckle that can reduce the possibility that the engagement between the male member and the female member is released by an operation that is not intended by the user.

  In order to solve the above-described problem, according to the present invention, a male member having an engagement protrusion and a female member having an engagement hole capable of receiving the engagement protrusion from an opening, the engagement protrusion includes: A head portion on the protruding end side and a small-diameter portion having a smaller diameter than the head portion, the female member includes a restraining device, and the restraining device is in the initial state, the engaging projection received in the engaging hole. An engaging portion that takes a locking position that is close to or in contact with the small-diameter portion so that the head cannot be removed from the engaging hole, and the engagement portion is moved from the locking position to the engagement of the head. An operating portion for elastically displacing to a non-locking position that allows removal from the hole, and the male member in a state in which the engaging protrusion is locked in the engaging hole by the engaging portion And the female member is a buckle that can be rotated around the engaging projection, and is one of the head and the opening. At least one convex portion protruding in the radial direction is provided on the peripheral surface of the head, and at least one concave in the radial direction allowing the passage of the at least one convex portion on the other peripheral surface of the head and the opening. A buckle with two recesses is provided.

  In the present invention, when the engagement protrusion of the male member is inserted into the engagement hole from the opening of the female member, at least one protrusion or recess provided on the peripheral surface of the head of the engagement protrusion, and the periphery of the opening By aligning at least one concave portion or convex portion provided on the surface in the circumferential direction, the convex portion can relatively pass through the concave portion in the insertion direction, thereby allowing the engagement protrusion to pass through the opening. It can be inserted into the engagement hole. When the engaging protrusion of the female member is received in the engaging hole of the female member, the engaging portion of the restraining tool of the female member approaches or contacts the small diameter portion of the engaging protrusion, and the head of the engaging protrusion is removed from the engaging hole. The locking position is set so that it cannot be removed. In this state, the male member and the female member are in an engaged state, and the male member and the female member can be rotated relative to each other. When releasing the engaged state, the user first elastically displaces the engaging portion from the locking position to the non-locking position by operating the operation portion of the restraining tool. In addition to this normal operation, at least one convex portion or concave portion provided on the peripheral surface of the head of the engaging protrusion and at least one concave portion or convex portion provided on the peripheral surface of the opening are aligned in the circumferential direction. Thus, the convex portion can relatively pass through the concave portion in the extraction direction, whereby the engagement protrusion can be passed through the opening portion and extracted from the engagement hole.

  In the present invention, as an aspect of the convex portion or concave portion provided on the peripheral surface of the head portion of the engaging protrusion of the male member and the concave portion or convex portion provided on the peripheral surface of the opening portion of the female member, the engaging protrusion is inserted into and removed from the opening portion. As long as the convex portion is limited to the circumferential position within the range of the concave portion, the number of concave portions and the range extending in the circumferential direction can be made larger than those of the convex portion. When the number of the concave portions is larger than the number of the convex portions, there are a plurality of circumferential positions where the engaging protrusions can be taken in and out of the openings. When the circumferential range of the concave portion is larger than the circumferential range of the convex portion, the circumferential position where the engaging projection can be taken in and out with respect to the opening portion spreads in the range dividing direction of the concave portion. Further, for example, the head portion and the opening portion of the engaging protrusion can each be formed into an oval shape, and the head portion can pass through the opening portion only at a position where both major diameters are aligned. Both sides are convex portions, and both sides of the major axis of the opening are concave portions.

  Although there may be at least one engaging portion of the restraining device, in the present specification and the drawings, it is described as a pair of opposing engaging portions, that is, two engaging portions. However, the number of engaging portions is not limited to these, and there may be three or more cases.

  In the present invention, the male member, the female member excluding the restraining tool, and the restraining tool can be molded from a thermoplastic resin such as polyacetal, polyamide, and polypropylene, but are not limited thereto.

  In the present invention, the male member or the female member is rotated so that the at least one convex portion and the at least one concave portion are rotated from a state in which the engagement protrusion of the restraining device is unlocked by the engaging portion. By aligning in the circumferential direction, the male member and the female member can be separated. That is, in the present invention, in order to separate the engaged male member and female member, in addition to operating the operating part of the restraining tool, at least one convex part and at least one concave part are arranged in the circumferential direction. An alignment operation is required. Therefore, even if the operating part of the restraining tool is accidentally operated during use, as long as the position of the convex part and the concave part do not match, the convex part is caught on the part defining the opening of the female member or the head of the male member. The male member and the female member cannot be separated. Thereby, the possibility that the engagement between the male member and the female member is released regardless of the intention of the user can be reduced.

  In an embodiment of the present invention, in a state where a tensile force is applied to at least one of the male member and the female member, the at least one convex portion and the at least one concave portion are displaced in the circumferential direction. In this buckle, a belt (including a string or the like) is connected to at least one of the male member and the female member, and a tensile force acts from the belt to at least one of the male member and the female member during use. With such a tensile force, the male member or the female member rotates around the engaging protrusion and settles in the equilibrium position. In the normal use state of the buckle, the male member and the female member are often in the equilibrium position. Therefore, in this embodiment, the circumferential positions of the convex portion and the concave portion are shifted so as not to be aligned at the equilibrium position. Thus, in a normal use state, even if the male member and the female member are in an equilibrium position due to a tensile force acting on at least one of the male member and the female member, even if the operating part of the restraining device is operated by mistake, Since the circumferential position of the portion and the recess is displaced, the engagement between the male member and the female member is not released.

  In one embodiment of the present invention, each of the male member and the female member includes a belt connecting portion having a belt hole, and the at least one convex portion and the at least one concave portion are belt holes of the male member and the female member, respectively. The concave portion is provided at a circumferential position that allows passage of the convex portion at a predetermined non-parallel position deviating from a parallel position at which the projections are parallel. In the present specification, the belt includes a strap, a string, and the like. The belt connecting portions of the male member and the female member of the buckle are connected to belts such as a strap, a child seat, a rucksack, and a backpack, respectively, in use. In the usage mode of the buckle, the male member and the female member are in a state in which a tensile force is applied from the belts connected to the respective belt holes (the tensile force acts in a direction to separate the male member and the female member). In this case, a parallel position where the belt holes are substantially parallel is often taken as the equilibrium position. In this case, the convex portion and the concave portion for preventing the engagement protrusion of the male member from inadvertently disengaging from the engagement hole of the female member allow the concave portion to pass through the convex portion at a non-parallel position deviating from the parallel position. It is desirable to provide at a predetermined circumferential position. As a result, when the male member and the female member are in the parallel position, even if the operation part is erroneously operated, the circumferential position of the convex part and the concave part does not match, so that the engagement protrusion may come out of the engagement hole. Absent. In addition, there is a usage mode in which only one of the male member and the female member is provided with a belt hole, and the other is fixed to, for example, a chair. In this case, the male member and the female member have the parallel positions based on the respective belt holes. The concept of the non-parallel position does not occur, and the belt hole and the female member or the female member or the female member or the female member or the female member or the female member or the female member or In some cases, the male member may not be parallel to a fixed part such as a chair to which the male member is fixed. Furthermore, “the belt holes (each of the male member and the female member) are parallel” means that a force is received from each of the two opposing side portions that define the belt holes of the male member and the female member. It means that the outer side is substantially parallel.

  In one embodiment of the present invention, the at least one convex portion is a peripheral surface of the head divided into two equal parts by a diameter perpendicular to a diameter parallel to the belt hole of the male member of the peripheral surface of the head. Including at least one convex portion provided on one side and at least one convex portion provided on the other side. In this configuration, even if the operation portion of the restraining device is erroneously operated at the parallel position where the belt holes of the male member and the female member are substantially parallel, the diameter is perpendicular to the diameter parallel to the belt hole of the male member. Since at least one convex portion is provided on each of the one side and the other side of the circumferential surface of the head divided into two equal parts by diameter, both the convex portion on one side and the convex portion on the other side are female members. It is caught by the part which prescribes | regulates the opening part of this, and engagement cancellation | release of a male member and a female member is prevented. In this embodiment, the concave portion provided in the opening of the female member is set so that both the convex portion on the one side and the convex portion on the other side can be passed simultaneously at the predetermined non-parallel position.

  In one embodiment of the present invention, the at least one convex portion includes two convex portions provided on a peripheral surface of the head along a diameter parallel to a belt hole of the male member. The two recesses include one or two sets of recesses provided along one or two diameters inclined at a predetermined angle with respect to the diameter parallel to the belt hole of the female member on the peripheral surface of the opening. In this embodiment, at the parallel positions where the belt holes of the male member and the female member are parallel, the two convex portions of the head portion of the engaging protrusion are aligned with the one or two pairs of concave portions in the circumferential direction. Therefore, the engagement protrusion does not come out of the engagement hole. On the other hand, by rotating the male member from the parallel position to the one or the other circumferential direction with respect to the male member by the predetermined angle, the two protrusions of the engaging protrusion are a pair of openings, that is, the two recesses and the circumferential position. Thus, the engaging protrusion can be removed from the engaging hole. When two sets of openings, that is, a total of four recesses are provided in the opening, when the male member is rotated from the parallel position to the male member in the circumferential direction by the predetermined angle, the two protrusions of the engaging protrusions become one of the openings. When the male member is rotated from the parallel position to the other circumferential direction by the predetermined angle while the pair of concave portions are aligned with the circumferential position, the two convex portions and the other pair of concave portions of the opening and the circumferential position Therefore, the engagement protrusion can be removed from the opening of the engagement hole at any circumferential position. In the present invention, the predetermined angle can be, for example, about 30 degrees, but is not limited thereto.

  In one embodiment of the present invention, the head includes a lower part of the head provided with the at least one convex part, and an upper part of the head whose outer diameter gradually decreases from the lower part of the head to the protruding end of the engaging protrusion. Including. When the engagement protrusion of the male member is inserted into the engagement hole of the female member, when a pair of engagement portions facing the restraining device are provided, the heads of the engagement protrusions are a pair of restraining devices in the female member. In this case, the space between the engaging portions is temporarily elastically widened while the head abuts against each engaging portion, and as soon as the head passes the engaging portions, a pair of engaging portions are passed. The joint portion is restored and comes close to or in contact with the small-diameter portion of the engaging protrusion, thereby locking the engaging protrusion. In this embodiment, since the upper part of the head, which is the protruding end side portion of the head of the engaging protrusion, is tapered toward the protruding end, the restraining tool is inserted when the engaging protrusion is inserted into the engaging hole of the female member. When passing between the pair of engaging portions, the head portion of the engaging member can be spread between the pair of engaging members while pressing the tapered head upper portion of the head against each engaging portion. It becomes easy to pass between the engaging portions. In addition, by providing a convex portion at the lower portion of the head adjacent to the lower portion in the insertion direction of the upper portion of the head that plays a role of expanding between the engaging portions, the convex portion is convex at the initial stage of the step of expanding the engaging portions. The part does not hit the engaging part.

  In an embodiment of the present invention, the at least one convex portion is provided on the head, and the convex portion has a tapered upper surface that gradually decreases in width along the circumferential direction toward the protruding end side of the engaging protrusion. Have. In this embodiment, when the engagement protrusion of the male member is inserted into the engagement hole of the female member, when the pair of engagement portions facing the restraining device is provided, the head of the engagement protrusion is in the female member. Passing between the pair of engaging parts of the restraining device while pushing them wide, at this time, even if the convex part of the head hits the engaging part, the engaging part can be pushed away by the tapered upper surface of the convex part. Can easily get over the engaging portion without being caught by the engaging portion.

  In an embodiment of the present invention, the engaging portion of the restraining device includes a pair of engaging portions, each of the pair of engaging portions having a left end side and a right end side, and one of the pair of engaging portions. The left end side and the other left end side, and the one right end side and the other right end side form a predetermined angle with respect to the center of the space between the pair of engaging portions. The predetermined angle can be about 60 degrees, but is not limited thereto. In this configuration, when the engaging protrusion of the male member is inserted into the engaging hole of the female member, the convex portion of the head is unlikely to hit the engaging portion, and the convex portion is engaged even if the convex portion hits the engaging portion. It becomes easy to push the joint part away.

  In one embodiment of the present invention, the operation portion of the restraining device includes two operation portions that protrude from the left and right side portions of the female member that are parallel to each other, and the male member is at the predetermined non-parallel position. It has at least one set of left and right side portions that are parallel to the left and right side portions of the female member and protrude from the left and right side portions but do not protrude from the two operation portions. The male member and the female member can rotate with each other in the engaged state. When the male member and the female member are in a predetermined non-parallel position, the convex portion and the concave portion are aligned in the circumferential direction, and the engaging protrusion is the opening portion. Can pass through. In this embodiment, at least one set of left and right side portions of the male member protrudes from the left and right side portions of the female member at a non-parallel position and does not protrude from the two operation portions. When the user intends to release the engagement between the male member and the female member when it is near a predetermined non-parallel position, when the two operation parts of the restraining device are pushed down with the fingers toward the left and right side parts of the female member When the left and right sides of the set of male members are pushed down together, the set of left and right sides of the set of male members rotate so that the left and right sides of the female member are parallel to the left and right sides of the female member. Guided to a non-parallel position. As a result, when the user operates the operation unit intentionally, the engagement protrusion can be pulled out from the engagement hole through the opening portion in a non-parallel position without further rotating the male member. The above-described guidance of the male member to the non-parallel position works when the deviation of the male member with respect to a predetermined non-parallel position (disengageable position) at the start of operation is within about ± 5 degrees.

  In the present invention, at least one convex portion projecting in the radial direction is provided on one peripheral surface of the head of the engaging protrusion of the male member and the opening of the female member, and the other peripheral surface of the head and the opening is provided. By providing at least one concave portion that is recessed in the radial direction allowing passage of at least one convex portion, the user operates the operating portion of the restraining tool when releasing the engagement state between the female member and the male member. In addition to the normal operation of elastically displacing the engaging part from the locking position to the non-locking position, at least one convex part or concave part provided on the peripheral surface of the head part of the engaging protrusion and the periphery of the opening part The operation | movement which aligns the at least 1 recessed part or convex part provided in the surface with the circumferential direction is needed. Therefore, it is possible to reduce the possibility that the engagement between the male member and the female member is released by an operation that is not intended by the user, such as when a child accidentally touches the operation portion of the buckle while using the strap.

FIG. 1 is a perspective view showing a buckle according to an embodiment of the present invention, in which a male member and a female member are in a parallel position. 2 is a cross-sectional view taken along line AA in FIG. 3 is a cross-sectional view taken along line BB in FIG. FIG. 4 is a plan view of the male member viewed from the inner surface. 5 is a cross-sectional view taken along the line CC of FIG. 6 is a cross-sectional view taken along the line DD of FIG. FIG. 7 is a plan view of the female main body of the female member as seen from the inner surface. 8 is a cross-sectional view taken along line EE in FIG. FIG. 9 is a plan view of the restraining device. FIG. 10 is an enlarged view of the engagement protrusion showing a front surface when the protrusion is viewed from the radially outer side of the engagement protrusion. FIG. 11 is a cross-sectional view substantially similar to FIG. 3 illustrating a state in which the male member and the female member are in a predetermined non-parallel position and the operation unit is operated. FIG. 12 is a view of a state in which the male member and the female member are in a predetermined non-parallel position and the operation unit is not operated, as viewed from the outer surface of the male member. FIG. 13 is a schematic diagram showing another example of the convex portion (a) of the engaging protrusion and the concave portion (b) of the opening. FIG. 14 is a schematic view showing an example in which a concave portion (a) is provided in the engaging protrusion and a convex portion (b) is provided in the opening.

  Hereinafter, some embodiments of the buckle according to the present invention will be described with reference to the drawings. However, the present invention is not limited to such embodiments, and is within the scope of the claims of the utility model registration and the equivalent scope. It can be changed as appropriate. FIG. 1 is a perspective view of a buckle 1 according to an embodiment of the present invention. 2 is a cross-sectional view taken along line AA in FIG. 3 is a cross-sectional view taken along line BB in FIG. The buckle 1 includes a male member 10 and a female member 30 that can be engaged with and released from the male member 10. The female member 30 includes a female main body 31 and a restraining tool 40 attached to the female main body 31. FIG. 4 is a plan view of the male member 10 as seen from the inner surface on the side facing the female member 30 when engaged. 5 is a cross-sectional view taken along the line CC of FIG. 6 is a cross-sectional view taken along the line DD of FIG. FIG. 7 is a plan view of the female main body 31 as viewed from the inner surface on the side facing the male member 10 when engaged. 8 is a cross-sectional view taken along line EE in FIG. FIG. 9 is a plan view of the restraining device 40. The male member 10, the female main body 31, and the restraining device 40 are all injection-molded products made of a thermoplastic resin such as polyacetal, polyamide, and polypropylene, but are not limited thereto.

  Referring to FIG. 4, male member 10 includes a substantially hexagonal plate-like base portion 11, a belt connecting portion 19 that is extended from one side portion of base portion 11 and to which a belt such as a strap is connected, and a base. The engagement protrusion 20 protrudes from the center part of 11a of the inner surface (surface which faces the female member 30 side in the engagement state with the female member 30) of the part 11. Hereinafter, unless otherwise specified, the vertical direction and the horizontal direction of the base portion 11 of the male member 10 are based on the paper surface of FIG. The base portion 11 of the male member 10 is downward from the upper portion 12a, the left and right upper inclined side portions 12b extending obliquely downward and laterally outward from both ends of the upper portion 12a, and the lower ends of the left and right upper inclined side portions 12b. And right and left lower inclined side portions 12c extending obliquely inward and leftward and rightward. The angles between the upper portion 12a and the left and right upper inclined side portions 12b and the angles between the left and right upper inclined side portions 12b and the left and right lower inclined side portions 12c are about 120 degrees. The left or right upper inclined side portion 12b and the right or left lower inclined side portion 12c are parallel to each other, and the interval between the vertically inclined side portions 12b and 12c that are parallel to each other is W1 (FIG. 4). The left and right boundary portions between the left and right upper inclined side portions 12b and the left and right lower inclined side portions 12c are rounded. The belt connecting portion 19 extends downward from between the lower ends of the left and right lower inclined side portions 12c of the base portion 11 and has elongated belt holes 19a on the left and right sides through which the belt passes.

  Referring to FIGS. 5 and 6, the engagement protrusion 20 is coaxially formed from the base portion 11 side to the protruding end 20 a side of the engagement protrusion 20, and includes a base end portion 21, a small diameter portion 22, and a head portion. 23. The outer diameter of the base end portion 21 is larger than the outer diameter of the small diameter portion 22, and the outer diameter of the small diameter portion 22 is smaller than the outer diameter of the head portion 23. Further, the engaging protrusion 20 has an outer diameter that decreases stepwise from the base end portion 21 to the small diameter portion 22, and an outer diameter increases stepwise from the small diameter portion 22 to the head portion 23. Hereinafter, unless otherwise specified, the vertical direction of the engaging protrusion 20 is based on the paper surface of FIGS. The head 23 has a lower head lower portion 23a having a substantially constant outer diameter, and a head upper portion 23b whose outer diameter gradually decreases from the head lower portion 23a to the upper end of the protruding end 20a. The outer diameter of the lower head portion 23 a is substantially the same as or slightly smaller than the outer diameter of the base end portion 21 and larger than the outer diameter of the small diameter portion 22. The upper end of the head upper portion 23b, that is, the protruding end 20a is a flat surface 20a perpendicular to the axis of the engaging protrusion. The outer peripheral surface of the head upper portion 23b is a tapered surface inclined upward and radially inward to the flat surface 20a. The outer diameter of the flat surface (projecting end) 20 a is substantially the same as the outer diameter of the small diameter portion 22. The base portion 11 is provided with a substantially frustoconical recess 29 from the outer surface 11b to the vicinity of the lower end of the small diameter portion 22 of the engagement protrusion 20.

  On the outer peripheral surface of the head upper portion 23b of the head 23, two convex portions 24 protruding outward in the radial direction are provided at intervals of 180 degrees. With reference to FIG. 4, the positions of the two protrusions 24 in the circumferential direction of the engagement protrusion 20 are on both sides of the diameter (lateral diameter) of the engagement protrusion 20 along the left-right direction of the base portion 11. In other words, the two protrusions 24 have one protrusion 24 on one side of the head 23 divided into two equal parts by a diameter perpendicular to the lateral diameter (diameter along the vertical direction based on the paper surface of FIG. 4). Another convex portion 24 is provided on the other side along the lateral diameter. The extension line of the horizontal diameter corresponds to a boundary portion between the upper inclined side portion 12b and the lower inclined side portion 12c of the base portion 11. FIG. 10 is an enlarged view of the engagement protrusion 20 showing the front surface of the protrusion 24 (the front surface when the protrusion 24 is viewed from the radially outer side of the engagement protrusion 20, that is, the front surface when viewed from the protruding side of the protrusion 24). It is. As can be seen from this figure, the convex portion 24 has an inverted V-shaped tapered upper surface 24a in which the lateral width (interval along the circumferential direction) gradually decreases upward.

  The female member 30 includes a female main body 31 and a restraining device 40 attached to the female main body 31. Hereinafter, unless otherwise specified, the vertical direction and the horizontal direction of the female main body 31 are based on FIG. The female main body 31 includes a case portion 32 that accommodates the restraining device 40 and a belt connecting portion 39 that extends above the case portion 32 and is connected to a belt. The belt connecting portion 39 has a belt hole 39a that is elongated to the left and right to pass the belt, and a bar 39b that divides the belt hole 39a into two. With reference to FIG. 8 etc., the case part 32 is between the outer side board 32a, the inner side board 32b substantially parallel to the outer side board 32a, and the lower end side (left end side in FIG. 8) of the outer side inner side boards 32a and 32b. And a lower side portion 32c to be connected. The inner plate 32b faces the male member 10 in a state where the female member 30 is engaged with the male member 10. Between the outer side plate 32a and the inner side plate 32b, the accommodating part s which is a space in which the stopper 40 is accommodated and mounted is defined. The lower side portion (the left side portion in FIG. 8) of the accommodating portion s is closed by the lower side portion 32 c, and the upper portion of the accommodating portion s is closed by the belt connecting portion 39. The left and right side portions 32d (see FIG. 7) of the case portion 32 are opened. Hereinafter, the side portion 32d is also referred to as an open side portion 32d. The restraining device 40 is inserted into the housing portion s from the left or right open side portion 32d. The left and right open side portions 32d of the case portion 32 are parallel to each other. The outer side plate 32a has a raised portion 32aa in which an intermediate portion in the vertical direction is raised upward. The raised portion 32aa covers the entire lateral width of the outer plate 32a. The head portion 23 of the engagement protrusion 20 of the male member 10 is accommodated in the raised portion 32aa (see FIG. 2). Therefore, the part corresponding to the head 23 in the space in the raised part 32aa becomes a part of the engagement hole 33a described later.

  With reference to FIG. 7, a circular opening 33 for receiving the engagement protrusion 20 of the male member 10 in the case portion 32 is provided at the center portion of the inner plate 32 b of the case portion 32. The opening 33 communicates with the housing part s. Moreover, the window part 35 long in the left-right direction which leads to the accommodating part s is provided above and below the opening part 33 of the inner side board 32b. The diameter of the opening 33 is set to be substantially the same as or slightly larger than the outer diameter of the base end portion 21 of the engagement protrusion 20. Therefore, the diameter of the opening 33 is substantially the same as or slightly larger than the outer diameter of the head lower portion 23 a of the head 23 of the engaging protrusion 20. On the periphery of the opening 33, two sets of recesses 34a and 34b cut out radially outward are provided in two sets, that is, a total of four as follows. A first set of two recesses 34a is formed along one diameter inclined by minus 30 degrees in the circumferential direction as a predetermined angle with respect to a diameter along the left-right direction passing through the center of the opening 33 (that is, a diameter parallel to the belt hole 39a). In addition, a second set of two concave portions 34b is formed along another diameter inclined at an additional 30 degrees in the circumferential direction with respect to the diameter. The angle formed by the diameter passing through the first set of recesses 34a and the diameter passing through the second set of recesses 34b is 60 degrees. The first and second sets of recesses 34 a and 34 b allow the two protrusions 24 of the engagement protrusion 20 to pass through. As will be described later, when the engaging protrusion 20 of the male member 10 is inserted into and extracted from the case 32 of the female member 30 through the opening 33, the two protrusions 24 of the engaging protrusion 20 are formed into the first set of recesses 34a. The engagement protrusion 20 can be inserted and extracted only when the position is in the circumferential position corresponding to the second set of recesses 34b. The interval between the left and right open side portions 32d of the female member 30 is W2 (see FIG. 7).

  Hereinafter, unless otherwise specified, the vertical direction and the horizontal direction of the restraining device 40 are based on the paper surface of FIG. The restraining device 40 includes a pair of upper and lower engaging portions 41, a pair of left and right operation portions 42 that are long in the vertical direction, and two base portions extending from the upper and lower centers of each operation portion 42. The spring part 43 connected to 41b, and the four latching | locking parts 44 extended in the left-right direction inner side from the upper and lower ends of each operation part 42 are provided. Each engagement portion 41 includes a substantially fan-shaped engagement portion main body 41a and a base portion 41b that protrudes outward in the vertical direction from the left and right center of each engagement portion main body 41a. Each engaging portion main body 41a has a left end side 41aa and a right end side 41ab. The right end sides 41ab of both engaging portion main bodies 41a are designed to form an angle of 60 degrees as an example of the predetermined angle P with respect to the center O of the space between the pair of engaging portions 41. Similarly, the left end sides 41aa of the both engaging portion main bodies 41a form 60 degrees. Thus, when the engagement protrusion 20 of the male member 10 is inserted into the engagement hole 33a of the female member 30 by setting the angle between the right end side 41ab and the left end side 41aa of the engagement portion 41 to 60 degrees, The convex part 24 of the head 23 is unlikely to hit the engaging part 41, and even if the convex part 24 hits the engaging part 42, the convex part 24 easily pushes the engaging part 41 away. Therefore, the engaging part 41 does not obstruct the passage of the convex part 24. The base portion 41 b of each engaging portion 41 protrudes outward in the vertical direction from the left and right center of each engaging portion 41. Moreover, the space | interval between the left-right direction outer end of the left-right operation part 42 in the non-operation state (initial state) of the stop tool 40 becomes W3 (refer FIG. 9). W3 is larger than the interval W1 (see FIG. 4) between the vertically inclined side portions 12b and 12c that are parallel to each other of the male member 10, and W1 is the interval W2 between the left and right open side portions 32d of the female member 30 (see FIG. 4). 7) (W3> W1> W2). The restraining device 40 is accommodated in the accommodating portion s by being inserted into the case portion 32 of the female main body 31 from the left or right open side portion 32d. In a state where the restraining device 40 is housed in the case portion 32, the left and right operation portions 42 of the restraining device 40 project outward from the left and right open side portions 32d of the female member 30 because W3> W2. Referring to FIG. 3, the lower part of the accommodating part s defined by the lower part 32 c of the case part 32 of the female member 30 and the upper part of the accommodating part s defined by the belt connecting part 39 are respectively A recess 36 having a concave shape is provided on the outer side in the direction. The left and right ends of the upper and lower depressions 36 become locked portions that receive and lock the locking claws 44a of the locking portion 44 when the stopper 40 is received in the receiving portion s. At the time of operation of the operation part 42 of the stop tool 40, the latching claw 44a leaves | separates from a to-be-latched part (refer FIG. 11). In addition, a hollow 36a that is further recessed outward in the vertical direction is provided at the center in the left-right direction of the upper and lower depressions 36. Each recess 36a can receive the protruding end of the base portion 41b of the engaging portion 41 that is elastically displaced outward in the vertical direction when the operation portion 42 of the restraining device 40 is operated (see FIG. 11).

  In a state where the restraining device 40 is accommodated in the case portion 32 of the female main body 31, the space between the pair of engaging portions 41 is a position corresponding to the opening portion 33 of the case portion 32. That is, the center O of the space between the pair of engaging portions 41 (see FIG. 9) and the center of the opening 33 are coaxial. Thus, when the engaging protrusion 20 of the male member 10 is inserted from the opening 33 of the female member 30, the engaging protrusion 20 passes between the pair of engaging portions 41 and engages with the engaging hole 33a (FIG. 2, FIG. 2). (See FIG. 8). At this time, the head 23 of the engaging protrusion 20 is accommodated in the raised portion 32aa of the outer plate 32a of the female main body 31. The engagement hole 33a is substantially defined by a space between the pair of engagement portions 41, a space corresponding to the head portion 23 in the raised portion 32aa, and a space defined by the opening 33. In other words, the engagement hole 33 a is a space in which the engagement protrusion 20 is accommodated in the case portion 32 of the female main body 31 when the male member 10 and the female member 30 are engaged. Therefore, the engagement hole 33a and the accommodating portion s share a space between the pair of engagement portions 41. In an initial state in which the operating portion 42 is not operated, the distance between the pair of engaging portions 41 is substantially equal to the outer diameter of the small diameter portion 22 of the engaging protrusion 20 of the male member 10 and the lower portion of the head 23 It is smaller than the outer diameter of 23a. Thus, when inserting the engagement protrusion 20 into the engagement hole 33a, first, the head 23 abuts against the pair of engagement portions 41, and the engagement portions 41 are temporarily separated from each other (the vertical direction in FIG. 9). As soon as the head 23 passes between the pair of engaging portions 41 in the insertion direction, the pair of engaging portions 41 are restored in a direction approaching each other and approach the small diameter portion 22 of the engaging protrusion 20. Or touch. In this state, the pair of engaging portions 41 are in the locking position. FIG. 3 shows a state in which the pair of engaging portions 41 in the locking position are in contact with the small diameter portion 22 of the engaging protrusion 20. When the engaging portion 41 is in the locking position, the head 23 of the engaging protrusion 20 is caught by the pair of engaging portions 41 and cannot be removed from the engaging hole 33a. When the user depresses the left and right operation portions 42 of the female member 30 toward the left and right open side portions 32d of the female member 30 from this state, the interval between the pair of engaging portions 41 widens (see FIG. 11), and the head 23 Passing between the engaging portions 41 is allowed. In this state, the pair of engaging portions 41 are in the non-locking position. However, as will be described in detail later, when the two protrusions 24 of the engagement protrusion 20 do not align with the first set of recesses 34a or the second set of recesses 34b of the opening 33 of the female member 30, Even when the operation portion 42 is operated to place the pair of engaging portions 41 in the non-locking position, the engaging protrusion 20 cannot be extracted from the engaging hole 33a.

  When the engagement protrusion 20 is received in the engagement hole 33a, the male member 10 and the female member 30 are engaged with each other. In this engagement state, the male member 10 and the female member 30 are mutually centered on the engagement protrusion 20. It can be rotated. Further, when the engaging protrusion 20 of the male member 10 is taken in and out of the engaging hole 33 a of the female member 30, the two protruding portions 24 of the engaging protrusion 20 and the first set of recessed portions 34 a of the opening 33 or the first It is necessary to align the two sets of recesses 34b in the circumferential direction. 1 to 3, the male member 10 and the female member 30 are in parallel positions where the belt holes 19a and the belt holes 39a are substantially parallel to each other. The belt holes 19a, 39a are parallel to each other on the outer side in the vertical direction, which is the side on which the tensile force from each belt acts during use, out of the two opposing side portions that define the belt holes 19a, 39a. It suffices that the portions 19aa and 39aa (see FIG. 3) are substantially parallel. In the case of the buckle 1, when the male member 10 and the female member 30 are in use, when the tensile force is applied by the belts connected to the respective belt holes 19 a and 39 a, the male member 10 is relative to the female member 30. The equilibrium position is settled while rotating to the parallel position in the present embodiment. Therefore, even if the operation part 42 is erroneously operated in the parallel position of the buckle 1, the convex part 24 of the engagement protrusion 20 of the male member 10 does not align with the concave parts 34 a and 34 b of the opening part 33 of the female main body 31 in the circumferential direction. Therefore, the engagement protrusion 20 does not come out of the engagement hole 33a. Referring to FIG. 3 showing the parallel position of the buckle 1, the two convex portions 24 shown by broken lines are arranged in the circumferential direction with respect to the two concave portions 34 a of the opening 33 and the other two concave portions 34 b. You can see that it is shifted. In this parallel position, even if the space between the pair of engaging portions 41 is enlarged by the operation of the operating portion 42 (including erroneous operation), the engaging protrusion 20 of the male member 10 cannot pass through the opening 33 of the female member 30, The engagement between the male member 10 and the female member 30 cannot be released.

  On the other hand, in the buckle 1, the convex portion 24 and the concave portion 34 a or the concave portion 34 b are aligned in the circumferential direction at predetermined non-parallel positions (first and second non-parallel positions) described below, whereby the concave portion 34 a of the convex portion 24. Alternatively, it is designed to allow passage of the recess 34b. Even if the convex portion 24 and the concave portion 34a or the concave portion 34b are aligned in the circumferential direction, the engagement between the male member 10 and the female member 30 is not released unless the operation portion 42 is operated. 11 is a cross-sectional view substantially similar to FIG. 3 showing a state in which the male member 10 and the female member 30 are in a predetermined non-parallel position and the operating portion 42 is operated. The cross section of the protrusion 20 is an axial position corresponding to the convex portion 24. When the engagement between the male member 10 and the female member 30 is released, in addition to the operation of pushing down the operation portion 42, a circumferential alignment operation between the convex portion 24 of the engaging protrusion 20 and the concave portion 34a or 34b of the opening portion 33 is required. Become. FIG. 12 is a view of a state in which the male member 10 and the female member 30 are in a predetermined non-parallel position and the operation unit 42 is not operated, as viewed from the outer surface 11 b of the male member 10. The state seen from the outer surface 11b of the male member 10 when the restraining device 40 is returned from the state of FIG. 11 to the initial state is FIG. The buckle 1 of the present embodiment is an upwardly inclined right side parallel to each other at a position where the two convex portions 24 and the first set of concave portions 34a are aligned in the circumferential direction (first non-parallel position (see FIG. 11)). The side portion 12b and the left lower inclined side portion 12c are parallel to the left and right open side portions 32d of the female main body 31 (see FIG. 12). In this first non-parallel position and in the initial state of the restraining device 40, since W3> W1> W2, as shown in FIG. 12, the right upper inclined side portion 12b and the left lower inclined side portion 12c are Although it protrudes outward from the left and right open side portions 32 d of the female main body 31, it does not protrude from the operation portion 42. Similarly, in a state where the two convex portions 24 and the second set of concave portions 34b are aligned in the circumferential direction (second non-parallel position), the left upper inclined side portion 12b parallel to each other and the right lower inclined side The part 12 c is parallel to the left and right open side parts 32 d of the female main body 31. In this second non-parallel position and in the initial state of the restraining device 40, since W3> W1> W2, the left upper inclined side portion 12b and the right lower inclined side portion 12c are opened to the left and right of the female main body 31. It is designed to protrude outward from the side portion 32d but not from the operation portion 42. When releasing the engagement between the male member 10 and the female member 30, the user rotates the male member 10 with respect to the female member 30 or the female member 30 with respect to the male member 10 in addition to the operation of the operation unit 42. Both of them need to be in the first or second non-parallel position. When the user intentionally starts operating the operation unit 42 from the engaged state of the male member 10 and the female member 30, the male member 10 is near the first or second non-parallel position, that is, the first or second non-parallel position. When the user pushes the two operation portions 42 of the restraining device 40 toward the left and right open side portions 32d of the female main body 31 with a finger, the male members 10 are parallel to each other. The right upper inclined side portion 12b and the left lower inclined side portion 12c, or the left upper inclined side portion 12b and the right lower inclined side portion 12c, which are parallel to each other, are connected to the left and right open side portions 32d. Since it protrudes substantially in parallel, it is easy to touch any of the upper inclined side portion 12b and the lower inclined side portion 12c with a finger. Pressing down the portion 12b and the lower inclined side portion 12c The ability. As a result, the upper inclined side portion 12b and the lower inclined side portion 12c of any of the sets of the male member 10 are slightly rotated so as to be parallel to the left and right open side portions 32d of the female member 30, so that the male member 10 is It is guided to a predetermined first or second non-parallel position. Accordingly, when the user operates the operation unit 42 intentionally, the male member 10 can be easily placed in a non-parallel position, and the engagement protrusion 20 can be pulled out from the engagement hole 33a through the opening 33.

  Referring to FIG. 10, the head 23 of the engagement protrusion 20 includes a head upper portion 23 b whose outer diameter gradually decreases toward the protruding end 20 a. Accordingly, when the head 23 is passed between the pair of engaging portions 41 of the restraining device 40 when the engaging protrusion 20 is inserted into the engaging hole 33 a of the female main body 31, the tapered head upper portion of the head 23. 23b can be pushed and expanded between the engaging portions 41 while abutting each engaging portion 41, so that the head 23 can be easily passed between the pair of engaging portions 41. In addition, by providing the convex portion 24 on the head lower portion 23a adjacent to the lower side in the insertion direction of the head upper portion 23b that plays a role of expanding the engagement portions 41, the convex portion 24 pushes the engagement portions 41 apart. The convex part 24 does not hit the engaging part 41 at the initial point of time, and the convex part 24 does not interfere with the enlargement between the engaging parts 41. Moreover, since the convex part 24 has the taper upper surface 24a from which the left-right width | variety reduces gradually upwards, the head 23 pushes between the pair of engaging parts 41 at the time of insertion to the engagement hole 33a. At this time, even if the convex portion 24 hits the engaging portion 41, the engaging portion 41 can be pushed away by the tapered upper surface 24 a of the convex portion 24. Therefore, it becomes easy for the convex portion 24 to get over the engaging portion 41 without being caught by the engaging portion 41.

  In the above embodiment, the two protrusions 24 of the engagement protrusion 20 and the first set of recesses 34a and the second set of recesses 34b of the opening 33 are illustrated, but the present invention is not limited to this. . For example, the engagement protrusion 20 has only one protrusion 24, the opening 33 has only one set of recesses 34a or only one set of recesses 34b, or there are three or more sets of recesses. It is conceivable that the circumferential range of one recess is wider, or a recess is provided on the engagement protrusion 20 side and a protrusion is provided on the opening side. FIG. 13 and FIG. 14 show modifications of the convex part and the concave part. In FIG. 13, the head 123 of the engaging protrusion has an oval cross section, and the long diameter side has two convex portions 124, and the opening 133 has two first concave portions 134 a and two second sets. Two recesses 134b are provided. The convex portion 124 can pass through the concave portion 134a or 134b only when substantially aligned with the first or second pair of concave portions 134a and 134b. In FIG. 14, the first set of two recesses 224a and the second set of two recesses 224b are provided also on the head 223 side of the engaging projection, and the two protrusions 234 are provided on the opening 233 side. The protrusion 234 can pass through the recess 224a or 224b only when substantially aligned with the first or second set of recesses 224a, 224b.

DESCRIPTION OF SYMBOLS 1 Buckle 10 Male member 11 Base part 11a Inner side surface of base part 12a Upper part of base part 12b Upper inclined side part of base part 12c Lower inclined side part of base part 19 Belt connecting part 19a Belt hole 20 Engaging protrusion 21 Base end Portion 22 Small diameter portion 23, 123, 223 Head portion 23a Head portion lower portion 23b Head portion upper portion 24, 124, 234 Convex portion 24a Tapered upper surface 30 Female member 31 Female body 32 Case portion 32b Inner plate 32d Left and right open side portions 33, 133 233 Opening 33a Engagement holes 34a, 134a, 224a First set of recesses 34b, 134b, 224b Second set of recesses 39 Belt connecting part 39a Belt hole 40 Stopper 41 Engagement part 41a Engagement part body 41aa Engagement Left end side of part main body 41ab Right end side of engaging part main body 42 Operation part 43 Spring part s Housing part W1 Male member 10 The interval between the vertically inclined side portions 12b and 12c that are parallel to each other W2 The interval between the left and right open side portions 32d of the female member 30 W3 Between the left and right outer ends of the left and right operation portions 42 in the initial state of the restraining device 40 interval

Claims (10)

A male member (10) having an engagement protrusion (20), and a female member (30) having an engagement hole (33a) capable of receiving the engagement protrusion (20) from the opening (33);
The engagement protrusion (20) includes a head (23) on the protruding end (20a) side and a small diameter portion (22) having a smaller diameter than the head (23),
The female member (30) includes a stop (40),
The stop (40) is engaged with the head (23) in proximity to or in contact with the small diameter portion (22) of the engagement protrusion (20) received in the engagement hole (33a) in the initial state. An engaging portion (41) that takes a locking position that makes it impossible to remove from the hole (33a), and the engaging portion (41) from the locking position to the engaging hole ( 33a) and an operating portion (42) for elastically displacing it to an unlocked position that allows disengagement,
The male member (10) and the female member (30) are engaged with the engaging protrusion (20) while the engaging protrusion (20) is locked in the engaging hole (33a) by the engaging portion (41). In the buckle (1) that can be pivoted relative to each other,
At least one convex portion (24, 124, 234) projecting in the radial direction is provided on one peripheral surface of the head portion (23) and the opening portion (33), and the head portion (23) and the opening portion are provided. On the other peripheral surface of (33), at least one recess (34a, 34b, 134a, 134b, 224a, 224b) recessed in the radial direction allowing passage of the at least one protrusion (24, 124, 234). Buckle with   The male member (10) or the female member (30) is rotated from the state in which the engagement protrusion (20) is released from the engagement by the engagement portion (41) of the restraining device (40) to rotate the at least By aligning one convex part (24, 124, 234) and the at least one concave part (34a, 34b, 134a, 134b, 224a, 224b) in the circumferential direction, the male member (10) and the female member ( 30. The buckle according to claim 1, wherein 30) can be separated.   In a state where a tensile force is applied to at least one of the male member (10) and the female member (30), the at least one convex portion (24, 124, 234) and the at least one concave portion (34a, The buckle according to claim 1 or 2, wherein positions of 34b, 134a, 134b, 224a, 224b) are shifted in the circumferential direction. The male member (10) and the female member (30) are each provided with a belt connecting portion (19, 39) having a belt hole (19a, 39a),
The at least one convex portion (24, 124, 234) and the at least one concave portion (34a, 34b, 134a, 134b, 224a, 224b) are belt holes of the male member (10) and the female member (30), respectively. The concave portions (34a, 34b, 134a, 134b, 224a, 224b) pass through the convex portions (24, 124, 234) at a predetermined non-parallel position deviated from the parallel position where (19a, 39a) is parallel. The buckle according to claim 1, wherein the buckle is provided at a permissible circumferential position.   The at least one convex portion (24, 124, 234) is bisected by a diameter perpendicular to the diameter parallel to the belt hole (19a) of the male member (10) on the peripheral surface of the head (23). At least one convex part (24, 124, 234) provided on one side of the peripheral surface of the head (23) and at least one convex part (24, 124, 234) provided on the other side The buckle according to claim 4. The at least one convex portion (24, 124) has two convex portions provided on the peripheral surface of the head portion (23) along a diameter parallel to the belt hole (19a) of the male member (10). (24, 124)
The at least one recess (34a, 34b, 134a, 134b) is one inclined at a predetermined angle with respect to the diameter parallel to the belt hole (39a) of the female member (30) on the peripheral surface of the opening (33). The buckle according to claim 4 or 5, comprising one set or two sets of recesses (34a, 34b, 134a, 134b) provided along two diameters.   The head (23) includes a lower head portion (23b) provided with the at least one convex portion (24, 124), and a protruding end (20a) of the engagement protrusion (20) from the lower head portion (23b). The buckle according to any one of claims 4 to 6, further comprising an upper part of the head (23a) whose outer diameter gradually decreases to the upper part.   The at least one convex portion (24) is provided on the head portion (23), and the convex portion (24) has a width substantially along the circumferential direction toward the protruding end (20a) side of the engaging protrusion (20). The buckle according to any one of claims 4 to 7, having a tapered upper surface (24a) that gradually decreases.   The engaging portion (41) of the restraining device (40) includes a pair of engaging portions (41), and each of the pair of engaging portions (41) has a left end side (41aa) and a right end side (41ab). The left end side (41aa) and the other left end side (41aa) of the pair of engaging portions (41) and the one right end side (41ab) and the other right end side (41ab) The buckle according to any one of claims 1 to 8, wherein the buckle forms a predetermined angle (P) with respect to a center (O) of a space between the engaging portions (41). The operation part (42) of the restraining tool (40) comprises two operation parts (42) respectively protruding from the left and right side parts (32d) parallel to each other of the female member (30),
The male member (10) is parallel to the left and right side portions (32d) of the female member (30) at the predetermined non-parallel position and protrudes from the left and right side portions (32d). The buckle according to any one of claims 4 to 9, wherein the buckle has at least one pair of left and right side portions (12b, 12c) that does not protrude further.

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