JP7477144B2 - Strap storage device - Google Patents

Description

The present invention relates to a strap storage device that includes first and second case halves that form a storage space, a rotor that is rotatably arranged within the storage space and around which a strap is wound, and an elastic body that elastically biases the rotor in the direction of winding the strap, and that is configured so that the strap can be pulled out of the storage space by a user's pulling operation.

Conventionally, various configurations of strap storage devices have been proposed as strap storage devices having first and second case halves that form a storage space. For example, a strap storage device has been proposed in which the first and second case halves are fixed by welding, such as the strap storage device described in Patent Document 1. However, in order to manufacture this conventional strap storage device, a special manufacturing process is required to weld the first and second case halves using a special welding device.

In order to simplify the manufacturing process by eliminating the welding process, for example, a strap device described in Patent Document 2 has been proposed. The strap device described in Patent Document 2 includes a first case, a second case, and a partition plate. The partition plate includes four first lances and four second lances, and a claw is formed at the tip of each lance. Four locking holes are formed on the outer periphery of the first case, and another four locking holes are formed on the outer periphery of the second case. The first case and the partition plate are fixed together by the claws of the first lance engaging with the locking holes of the first case. The second case and the partition plate are fixed together by the claws of the second lance engaging with the locking holes of the second case.

In the strap device described in Patent Document 2, a push button that is operated to wind up the strap using the elastic force of a power spring is disposed on the first case. When a user presses the push button, the strap is wound up until the connecting member of the safety connector that is connected to the strap abuts against the first case.

JP 2017-128406 A Japanese Patent No. 5230679

In the strap device described in Patent Document 2, the first and second lances of the partition plate are elastically engaged with the locking holes of the first and second cases, thereby fixing the first and second cases via the partition plate. When a user is using the strap device, an external impact force may be applied to the fixed first and second cases. For example, if the user accidentally drops the strap device, or if the connecting member collides with the first case when the user presses the push button to wind up the strap, a large impact force will be applied to the first and second cases.

When external impact forces are repeatedly applied to the strap device, one of the lances on the partition plate may come out of the locking holes in the first and second cases. If one of the lances comes out of the locking holes, the locking force acting between the first and second cases and the partition plate may decrease, and in some cases, gaps may occur between the first and second cases and the partition plate.

Therefore, the present invention was made in consideration of the above problems, and aims to provide a strap storage device that can reliably maintain the fixed state of the first and second case halves even when an external impact force is applied.

(First aspect of the invention)
The first aspect of the invention described in claim 1 comprises a rotating body around which a long strap is wound, first and second case sections which form a storage space for rotatably storing the rotating body around a predetermined rotation axis, an elastic body which is stored in the storage space and biases the rotating body so that the rotating body rotates in the predetermined winding direction, fixing means for fixing the first and second case sections, and a withdrawal opening formed in at least one of the first and second case sections and through which the strap is withdrawn . In a first aspect of the invention, the first case section includes a first circumferential end section defining a first opening that opens in an axial direction along which a predetermined rotation axis extends, and the second case section includes a second circumferential end section defining a second opening that opens in the axial direction, the second circumferential end section being formed in a shape that can be joined to the first circumferential end section via an attachment member attached to the second circumferential end section, or directly without an attachment member, and the fixing means includes a locking fixing means having a bent locking end section, the locking end section including an elastically deformable locking piece that extends in the axial direction, and a locking groove with which the locking end section engages, a fitting protrusion that extends in the axial direction, and a fitting protrusion that extends in the axial direction and is formed to extend in the axial direction. and a fitting fixing means including a fitting hole into which a locking fixing means is inserted and fitted, wherein at least one set of one locking fixing means and at least one fitting fixing means is arranged between the first circumferential end and the second circumferential end, or between the first circumferential end and an attachment member attached to the second circumferential end , and the at least one set is arranged within an angular range on at least one of both sides of the pull-out opening in the circumferential direction in which the first circumferential portion and the second circumferential portion extend, and the angular range on at least one of both sides of the pull-out opening is an angular range within 90 degrees from the pull-out opening about a predetermined rotation axis .

In this aspect of the present invention, the strap may be a band-like object or a string-like object, so long as it is long. The strap may also be configured so that an item such as a name card can be attached to the tip of the strap. If the strap is a band-like object with measuring tape markings, nothing is attached to the tip of the strap other than a metal fitting for holding it.

In this aspect of the invention, the first and second peripheral portions of the first and second case segments may be formed in various shapes, such as circular, elliptical, and polygonal.

In this aspect of the present invention, the first and second case halves may be configured to form one storage space. Alternatively, the mounting member attached to the second case halves may be used as the partition plate described in Patent Document 2, and the first and second case halves and the mounting member may form two storage spaces. In a configuration that forms two storage spaces, two rotating bodies and two elastic bodies may be disposed in the two storage spaces, respectively.

In this aspect of the present invention, when an attachment member is used, various means are employed as a means for attaching the attachment member to the second case section. As a means for attaching the attachment member to the second case section, a locking fixing means and a fitting fixing means are preferably used as a set, but for example, only either the locking fixing means or the fitting fixing means may be used.

In this aspect of the present invention, various arrangements are adopted for the arrangement of the locking piece, locking groove, fitting protrusion, and fitting hole. For example, the locking piece and fitting protrusion may be arranged on the first peripheral portion, and the locking groove and fitting hole may be arranged on the second peripheral portion or the mounting member. Alternatively, the locking piece and fitting hole may be arranged on the first peripheral portion, and the locking groove and fitting protrusion may be arranged on the second peripheral portion or the mounting member.

In this aspect of the present invention, at least one set of one locking means and at least one fitting means may be used as a fixing means for fixing the first case section and the second case section. If only one set is used, either the locking means or the fitting means may be used as an additional means for fixing the two case sections.

In this aspect of the present invention, it is preferable that the locking fixing means and the fitting fixing means are disposed as close as possible to each other in the peripheral direction in which the first and second peripheral portions extend. However, there are no particular limitations on the distance in the peripheral direction between the locking fixing means and the fitting fixing means, as long as the relative displacement between the first peripheral portion and the second peripheral portion can be reduced by fitting the fitting protrusion into the fitting hole so that the locking end does not come out of the locking groove when an external impact force is applied to the strap storage device.

In this aspect of the present invention, one or more mating protrusions may be arranged on either side of the locking piece in the peripheral direction in which the first and second peripheral portions extend. Alternatively, one or more mating protrusions may be arranged on only one of the two sides of the locking piece in the peripheral direction.

In this aspect of the present invention, when a connecting member that is connected to the strap is provided, the connecting member may be configured to abut against a part of the case divided body to stop the wrapping of the strap when the strap is wrapped around the rotating body by the elastic force of the elastic body, or may be configured not to abut against a part of the case divided body even when the strap is completely wrapped around the rotating body.

In this aspect of the present invention , the first peripheral portion and the second peripheral portion are each formed in a circular shape centered on a predetermined rotation axis, and a plurality of sets, each consisting of one locking means and at least one fitting and fixing means, are arranged between the first peripheral end and the second peripheral end, or between the first peripheral end and an attachment member attached to the second peripheral end, and among the plurality of sets, the fitting protrusions of one of two sets adjacent in the circumferential direction in which the first peripheral portion and the second peripheral portion extend may be arranged closer to the locking pieces of the one set than the locking pieces of the other set. In this aspect of the present invention, the fitting protrusions of one set may be arranged on either side of the locking pieces of the one set in the circumferential direction, as long as the circumferential distance between the fitting protrusions of one set and the locking pieces of the one set is smaller than the circumferential distance between the fitting protrusions of one set and the locking pieces of the other set.

(Second aspect of the invention)
The second aspect of the invention described in claim 2 comprises a rotating body around which a long strap is wound, first and second case sections which form a storage space for rotatably storing the rotating body around a predetermined rotation axis, an elastic body which is stored in the storage space and biases the rotating body so that the rotating body rotates in the predetermined winding direction, fixing means for fixing the first and second case sections, and a withdrawal opening formed in at least one of the first and second case sections and through which the strap is withdrawn. In a second aspect of the invention, the first case section includes a first circumferential end section defining a first opening that opens in an axial direction along which a predetermined rotation axis extends, and the second case section includes a second circumferential end section defining a second opening that opens in the axial direction, the second circumferential end section being formed in a shape that can be joined to the first circumferential end section via an attachment member attached to the second circumferential end section, or directly without an attachment member, and the fixing means includes a locking and fixing means having a bent locking end section and including an elastically deformable locking piece that extends in the axial direction and an locking groove with which the locking end section engages, a fitting and fixing means including a fitting protrusion that extends in the axial direction, and a fitting hole that is formed to extend in the axial direction and into which the fitting protrusion is inserted and fitted. a step, and a plurality of sets, each consisting of one locking and fixing means and at least one fitting and fixing means, are arranged between the first circumferential end and the second circumferential end, or between the first circumferential end and an attachment member attached to the second circumferential end, and among the plurality of sets, of two sets adjacent to each other in the circumferential direction in which the first circumferential edge portion and the second circumferential edge portion extend, the locking pieces and at least one fitting protrusion of one set and the locking pieces and at least one fitting protrusion of the other set are respectively arranged within two angular ranges on both sides in the circumferential direction of the draw-out opening, and each of the two angular ranges is an angular range within 90 degrees from the draw-out opening around a predetermined rotation axis.

(Third aspect of the invention, fourth aspect of the invention, and specific aspects thereof)
A third aspect of the invention as set forth in claim 3 comprises a rotating body around which a long strap is wound, first and second case pieces forming an accommodation space for accommodating the rotating body rotatably about a predetermined rotation axis, an elastic body accommodated in the accommodation space and biasing the rotating body so that the rotating body rotates in the predetermined winding direction, and a fastening means for fastening the first and second case pieces together. In the third aspect of the invention, the first case piece includes a first circumferential end portion defining a first opening that opens in the axial direction along which the predetermined rotation axis extends, and the second case piece includes a second circumferential end portion defining a second opening that opens in the axial direction, the second circumferential end portion including a shape that can be joined to the first circumferential end portion via an attachment member attached to the second circumferential end portion or directly without an attachment member, and the fastening means includes a bent locking end portion and an elastically deformable locking piece extending in the axial direction and an engagement piece with which the locking end portion engages. a stop groove, a fitting hole formed in the axial direction and into which the fitting protrusion is inserted and fitted, the first peripheral edge portion and the second peripheral edge portion are each formed in a circular shape centered on a predetermined rotation axis, and a plurality of sets, each set consisting of one stop groove and at least one fitting hole, are disposed between the first peripheral end portion and the second peripheral end portion, or between the first peripheral end portion and an attachment member attached to the second peripheral end portion. A third aspect of the invention comprises a pull-out opening formed in at least one of the first and second case pieces and through which a strap is pulled out, and a connecting member connected to the strap, the connecting member abutting against a portion of the case piece where the pull-out opening is formed and stopping the winding of the strap when the strap is wound around the rotating body by the elastic force of the elastic body. In a third aspect of the invention , of the multiple sets, the locking pieces and at least one mating protrusion of one of two sets adjacent in the circumferential direction in which the first peripheral portion and the second peripheral portion extend , and the locking pieces and at least one mating protrusion of the other set are respectively arranged within two angular ranges on both sides in the circumferential direction of the pull-out opening, and each of the two angular ranges is an angular range within 90 degrees from the pull-out opening centered on a predetermined rotation axis.

In a third aspect of the invention , the connecting member may be a member that a user can grasp with their fingers to pull out the strap, or it may be a part of the safety connector described in U.S. Pat. No. 5,399,433.

In the third aspect of the invention , a single drawer opening may be formed in only one of the first and second case sections, or two separate drawer openings may be formed in the first and second case sections, respectively, or two forming portions forming a single drawer opening may be formed in the first and second case sections, respectively.

In a specific embodiment described in claim 4, one locking and fixing means and two fitting and fixing means form a set that is arranged within each of two angular ranges , and the two fitting protrusions of the two fitting and fixing means are respectively arranged on both sides in the circumferential direction of the locking piece of the locking and fixing means of the same set as the two fitting and fixing means.

In this specific embodiment, at least one of the plurality of sets may be composed of one locking fixing means and two fitting fixing means.

A fourth aspect of the invention as set forth in claim 5 includes a rotating body around which a long strap is wound, first and second case pieces forming an accommodation space for accommodating the rotating body rotatably about a predetermined rotation axis, an elastic body accommodated in the accommodation space and biasing the rotating body so that the rotating body rotates in the predetermined winding direction, and a fastening means for fastening the first and second case pieces. In the fourth aspect of the invention, the first case piece includes a first circumferential end portion defining a first opening that opens in the axial direction along which the predetermined rotation axis extends, and the second case piece includes a second circumferential end portion defining a second opening that opens in the axial direction, the second circumferential end portion being formed in a shape that can be joined to the first circumferential end portion via an attachment member attached to the second circumferential end portion or directly without an attachment member, and the fastening means includes a bent locking end portion that engages with an elastically deformable locking piece extending in the axial direction. the first peripheral portion and the second peripheral portion are each formed in a circular shape centered on a predetermined rotation axis, and a plurality of sets, each consisting of one locking means and at least one locking means, are arranged between the first peripheral end and the second peripheral end, or between the first peripheral end and an attachment member attached to the second peripheral end, and one locking means and one locking means constitute one set, and of the plurality of sets, the locking protrusion of one of two sets adjacent in the circumferential direction in which the first peripheral portion and the second peripheral portion extend is arranged only on the side farther from the locking piece of the other set, of both sides in the circumferential direction of the locking piece of one set.

In the fourth aspect of the invention , at least one of the plurality of sets may be composed of one locking fixing means and one fitting fixing means.

In the specific embodiment described in claim 6, one locking and fixing means and at least one fitting and fixing means form one set, and in one set of the fitting and fixing means, the fitting protrusion of the fitting and fixing means is disposed on the side closer to the drawer opening of both sides in the circumferential direction of the locking piece of the locking and fixing means.

In this specific embodiment, in one set of fitting and fixing means and locking and fixing means, if one fitting protrusion is arranged on one of both sides of the locking piece in the circumferential direction, which is closer to the drawer opening, another fitting protrusion may be arranged on one of both sides of the locking piece in the circumferential direction, which is farther from the drawer opening.

In the specific embodiment described in claim 7, one locking and fixing means and one fitting and fixing means form one set, and in one set of fitting and fixing means, the fitting protrusion of the fitting and fixing means is disposed only on the side farthest from the drawer opening among both sides in the circumferential direction of the locking piece of the locking and fixing means.

In the specific embodiment described in claim 8, a plurality of sets, each consisting of one locking and fixing means and at least one fitting and fixing means, are arranged between the first peripheral end and the second peripheral end, or between the first peripheral end and the mounting member attached to the second peripheral end, and among the plurality of sets, the locking pieces and at least one fitting protrusion of one of two sets adjacent in the circumferential direction and the locking pieces and at least one fitting protrusion of the other set are arranged in a line-symmetrical relationship with respect to a line connecting a predetermined rotation axis and the position of the withdrawal opening as the axis of symmetry.

In a specific embodiment described in claim 9, the two fitting and fixing means are arranged between the first peripheral end and the second peripheral end, or between the first peripheral end and the mounting member attached to the second peripheral end, so that they are located on a line that is perpendicular to a line connecting the predetermined rotation axis and the position of the withdrawal opening and passes through the predetermined rotation axis.

( Fifth aspect of the invention and specific aspects thereof)
A fifth aspect of the invention as described in claim 10 comprises a rotating body around which a long strap is wound, first and second case pieces forming a storage space for accommodating the rotating body rotatably about a predetermined rotation axis, an elastic body accommodated in the storage space, the elastic body biasing the rotating body so that the rotating body rotates in a predetermined winding direction, fastening means for fastening the first and second case pieces, an extraction opening formed in at least one of the first and second case pieces and for extracting the strap, and a connecting member connected to the strap, the connecting member abutting against a portion of the case piece forming the extraction opening when the strap is wrapped around the rotating body by the elastic force of the elastic body, to stop the winding of the strap, wherein the first case piece includes a first circumferential end portion defining a first opening that opens in an axial direction along which the predetermined rotation axis extends, and the second case piece includes a second circumferential end portion defining a second opening that opens in the axial direction, the first circumferential end portion being attached to the first circumferential end portion via an attachment member attached to the second circumferential end portion or directly without an attachment member. the first peripheral portion and the second peripheral portion are each formed in a circular shape centered on a predetermined rotation axis, and the fixing means has a bent locking end portion, and includes a locking fixing means having an elastically deformable locking piece extending in the axial direction and a locking groove with which the locking end portion engages, and a fitting fixing means including a fitting protrusion extending in the axial direction and a fitting hole formed to extend in the axial direction and with which the fitting protrusion fits, and a plurality of sets, each of which is a set of one locking fixing means and at least one fitting fixing means, are provided between the first peripheral portion and the second peripheral portion. The first and second sets of locking pieces and at least one mating protrusion are arranged between the first peripheral end and the second peripheral end, or between the first peripheral end and an attachment member attached to the second peripheral end, and among the multiple sets, in first and second sets adjacent in the circumferential direction in which the first and second peripheral ends extend, the locking pieces and at least one mating protrusion of the first set and the locking pieces and at least one mating protrusion of the second set are respectively arranged within two angular ranges on both sides in the circumferential direction of the draw-out opening, and each of the two angular ranges is an angular range within 45 degrees from the draw-out opening centered on a predetermined rotation axis.

In this aspect of the present invention, as long as the locking piece and at least one fitting protrusion in one set of locking and fixing means are arranged within an angular range of 45 degrees or less, another fitting protrusion may be arranged outside the angular range of 45 degrees or less.

In this aspect of the present invention, if the first and second sets, each consisting of one locking fixing means and at least one fitting fixing means, are arranged within two angular ranges on either side of the circumference of the drawer opening, respectively, only one of the locking fixing means and the fitting fixing means may be used as a means for fixing the first case section and the second case section outside each angular range.

In this aspect of the present invention, similarly to the first to fourth aspects of the invention and their specific aspects, each component part of the strap storage device can be embodied in various aspects.

In a specific embodiment described in claim 11, the multiple sets include a third set in addition to the first and second sets, and one locking fixing means and at least one fitting fixing means of the third set are arranged at a position that is point-symmetrical with the position of the drawer opening, with the predetermined rotation axis as the center of symmetry.

In a specific embodiment of claim 12, the multiple sets include a third and a fourth set in addition to the first and second sets, and the one locking and fixing means and at least one fitting and fixing means of the third set are arranged in a position that is symmetrical to the position of the one locking and fixing means and at least one fitting and fixing means of the first set, with a line that is perpendicular to the line connecting the predetermined rotation axis and the position of the draw-out opening and that passes through the predetermined rotation axis as the axis of symmetry, and the one locking and fixing means and at least one fitting and fixing means of the fourth set are arranged in a position that is symmetrical to the position of the one locking and fixing means and at least one fitting and fixing means of the second set, with a line that is perpendicular to the line connecting the predetermined rotation axis and the position of the draw-out opening and that passes through the predetermined rotation axis as the axis of symmetry.

(Effects of the first to fourth aspects of the invention and their specific aspects)
In the first aspect of the invention described in claim 1, the locking end of the locking piece engages with the locking groove by elastic deformation of the locking piece itself. The fitting protrusion is inserted into the fitting hole and fits into it. The first peripheral edge of the first case section is joined and fixed to the second peripheral edge of the second case section or to an attachment member attached to the second peripheral edge by engaging the locking end with the locking groove and fitting the fitting protrusion into the fitting hole. At least one set of one locking fixing means and at least one fitting fixing means is arranged within an angular range on at least one of both sides of the draw-out opening, and the angular range on at least one of both sides of the draw-out opening is within an angular range of 90 degrees from the draw-out opening about a predetermined rotation axis. As a result, when an external impact force is applied to the strap storage device, the relative displacement between the first and second peripheral edges within an angular range of 90 degrees from the drawer opening about the predetermined rotation axis is reduced by the engagement between the fitting protrusion and the fitting hole. This reduction in relative displacement reduces the possibility of the locking end coming out of the locking groove, and the fixed state of the first and second case halves can be reliably maintained.

In the second aspect of the invention described in claim 2, the locking end of the locking piece engages with the locking groove by elastic deformation of the locking piece itself. The fitting protrusion is inserted into the fitting hole and fits therewith. By the locking end engaging with the locking groove and the fitting protrusion fitting into the fitting hole, the first peripheral edge of the first case piece is joined and fixed to the second peripheral edge of the second case piece or to an attachment member attached to the second peripheral edge. One locking and fixing means and at least one fitting and fixing means are regarded as one set, and among the sets, the locking pieces and at least one fitting protrusion of one set of two sets adjacent to each other in the circumferential direction in which the first peripheral portion and the second peripheral portion extend are disposed within two angular ranges on both sides in the circumferential direction of the draw-out opening, and each of the two angular ranges is within 90 degrees from the draw-out opening about a predetermined rotation axis. As a result, when an impact force is applied to the strap storage device from the outside, the first peripheral portion and the second peripheral portion are relatively displaced from each other in two angular ranges within 90 degrees from the draw-out opening about a predetermined rotation axis by the fitting of the fitting protrusion and the fitting hole. This reduction in relative displacement reduces the disengagement of the locking end from the locking groove, and the fixed state of the first and second case halves can be reliably maintained. When the first and second aspects of the invention are configured such that, among a plurality of sets each consisting of one locking fixing means and at least one fitting fixing means, the fitting protrusion of one of two circumferentially adjacent sets is positioned closer to the locking piece of the one set than the locking piece of the other set, by positioning the fitting protrusion closer to the locking piece in the locking fixing means and fitting fixing means of one set, when an impact force is applied to the strap storage device from the outside, it is possible to make it even more difficult for the locking end to come out of the locking groove, and the fixed state of the first and second case parts can be maintained even more reliably.

In a third aspect of the invention , when the strap is wound around the rotating body by the elastic force of the elastic body, the connecting member connected to the strap abuts against a portion of the case section where the draw-out opening is formed to stop the winding of the strap. Of the multiple sets, the locking pieces and at least one fitting protrusion of one of two sets adjacent in the circumferential direction and the locking pieces and at least one fitting protrusion of the other set are respectively arranged within two angular ranges on both sides in the circumferential direction of the draw-out opening, and each of the two angular ranges is an angular range of 90 degrees or less from the draw-out opening about a predetermined rotation axis. As a result, when an impact force is applied to the strap storage device from the outside due to the connecting member colliding with a portion of the case section, the relative displacement of the first peripheral portion and the second peripheral portion within each angular range of 90 degrees or less on both sides of the draw-out opening is reduced by the engagement of the fitting protrusions with the fitting holes. This reduction in relative misalignment reduces the likelihood of the locking end coming out of the locking groove within an angular range of 90 degrees on either side of the drawer opening, thereby ensuring that the first and second case halves are kept fixed in place.

In the specific embodiment described in claim 4, one locking means and two fitting means form one set, and the two fitting projections of the two fitting means are arranged on both sides in the circumferential direction of the locking piece of the locking means of the same set as the two fitting means. As a result, when an impact force is applied to the strap storage device from the outside, the two fitting projections are arranged on both sides of the locking piece, so that the first peripheral portion and the second peripheral portion are more reliably reduced from being displaced relative to each other.

In the fourth aspect of the invention described in claim 5, one locking and fixing means and one fitting and fixing means form one set, and the fitting protrusions of one set of two sets adjacent in the circumferential direction are arranged only on the side of the locking pieces of one set that is farther from the locking pieces of the other set in the circumferential direction of the locking pieces of one set. As a result, compared to a configuration in which the fitting protrusions are arranged on the side of the locking pieces closer to the locking pieces of the other set of sets, by arranging the fitting protrusions only on the side of the locking pieces of the other set of sets that is farther from the locking pieces of the other set of sets, the locking pieces of one set and the locking pieces of the other set can be arranged close to each other, and the locking force for locking the first and second case sections can be increased.

In the specific embodiment described in claim 6, one locking and fixing means and at least one fitting and fixing means form one set, and in one set of the fitting and fixing means and the locking and fixing means, the fitting protrusion of the fitting and fixing means is disposed on the side closer to the drawer opening of both sides of the locking piece of the locking and fixing means in the circumferential direction. As a result, by disposing the fitting protrusion on the side closer to the drawer opening of both sides of the locking piece, the relative displacement of the first peripheral portion and the second peripheral portion around the drawer opening is reduced by the fitting protrusion and the fitting hole.

In the specific embodiment described in claim 7, one locking and fixing means and one fitting and fixing means form one set, and in one set of the fitting and fixing means and the locking and fixing means, the fitting protrusion of the fitting and fixing means is disposed only on the side of the locking piece of the locking and fixing means that is farther from the drawer opening. As a result, compared to a configuration in which the fitting protrusion is disposed on the side of the locking piece that is closer to the drawer opening, the fitting protrusion is disposed only on the side of the locking piece that is farther from the drawer opening, so that the locking piece can be disposed closer to the drawer opening, and the locking force that locks the first and second case halves around the drawer opening can be increased.

In the specific embodiment described in claim 8, the locking pieces and at least one fitting protrusion of one of two adjacent sets in the circumferential direction among the multiple sets are arranged in a line-symmetrical relationship with the locking pieces and at least one fitting protrusion of the other set, with the line connecting the predetermined rotation axis and the arrangement position of the draw-out opening as the axis of symmetry. As a result, the two sets of locking pieces and fitting protrusions arranged in a line-symmetrical relationship uniformly reduce the relative deviation between the first peripheral portion and the second peripheral portion on both sides of the axis of symmetry. By uniformly reducing this relative deviation, it is possible to reduce the disengagement of the locking end portions from the locking grooves on both sides of the axis of symmetry, and the fixed state of the first and second case segments can be reliably maintained.

In the specific embodiment described in claim 9, the two fitting and fixing means are arranged so that they are each located on a line that is perpendicular to a line connecting the predetermined rotation axis and the position of the drawer opening and that passes through the predetermined rotation axis. As a result, even if the first peripheral edge portion and the second peripheral edge portion are slightly misaligned relative to each other around the drawer opening when an impact force is applied to the strap storage device from the outside by the connecting member colliding with a part of the case split body, the transmission of the slight relative misalignment to the part of the first peripheral edge portion and the second peripheral edge portion located farther from the drawer opening than the perpendicular line passing through the predetermined rotation axis can be reduced by the fitting protrusions of the two fitting and fixing means and the fitting holes.

(Effects of the fifth aspect of the invention and its specific aspects)
In a fifth aspect of the invention as set forth in claim 10, when the strap is wound around the rotating body by the elastic force of the elastic body, a connecting member connected to the strap abuts against a portion of the case section forming the drawer opening to stop the winding of the strap. The locking end of the locking piece engages with the locking groove as the locking piece itself elastically deforms. The fitting protrusion is inserted into and fits into the fitting hole. As the locking end engages with the locking groove and the fitting protrusion fits into the fitting hole, the first peripheral edge of the first case section is joined and fixed to the second peripheral edge of the second case section, or to an attachment member attached to the second peripheral edge. In the first and second sets of sets that are adjacent to each other in the circumferential direction, the locking pieces and at least one fitting protrusion of the first set and the locking pieces and at least one fitting protrusion of the second set are respectively arranged within two angular ranges on both sides in the circumferential direction of the draw-out opening, and each of the two angular ranges is within an angular range of 45 degrees from the draw-out opening about a predetermined rotation axis. As a result, when an impact force is applied from the outside to the strap storage device by the connecting member colliding with a part of the case section, the relative displacement of the first peripheral edge portion and the second peripheral edge portion within each angular range of 45 degrees around the draw-out opening is reduced by the engagement of the fitting protrusions with the fitting holes. This reduction in relative displacement reduces the disengagement of the locking ends from the locking grooves around the draw-out opening, and the fixed state of the first and second case sections can be reliably maintained.

In the specific embodiment described in claim 11, the multiple sets include a third set in addition to the first and second sets. One locking and fixing means and at least one fitting and fixing means of the third set are arranged at a position that is point-symmetrical with respect to the arrangement position of the drawer opening, with the predetermined rotation axis as the center of symmetry. As a result, when an impact force in a direction from the arrangement position of the drawer opening toward the predetermined rotation axis is applied to the strap storage device from the outside due to the collision of the connecting member with a part of the case section, the relative displacement of the first peripheral edge portion and the second peripheral edge portion is further reduced by the engagement of the fitting protrusions and fitting holes of the first and second sets as well as the engagement of the fitting protrusions and fitting holes of the third set. This further reduction in relative displacement reduces the disengagement of the locking end portion from the locking groove around the drawer opening and at a position point-symmetrical with respect to the arrangement position of the drawer opening, and the fixed state of the first and second case sections can be more reliably maintained.

In a specific embodiment of claim 12, the multiple sets include a third and a fourth set in addition to the first and second sets. The one locking and fixing means and at least one fitting and fixing means of the third set are arranged in a position that is symmetrical to the position of the one locking and fixing means and at least one fitting and fixing means of the first set, with a line that is perpendicular to the line connecting the predetermined rotation axis and the position of the draw-out opening and that passes through the predetermined rotation axis as an axis of symmetry. The one locking and fixing means and at least one fitting and fixing means of the fourth set are arranged in a position that is symmetrical to the position of the one locking and fixing means and at least one fitting and fixing means of the second set, with a line that is perpendicular to the line connecting the predetermined rotation axis and the position of the draw-out opening and that passes through the predetermined rotation axis as an axis of symmetry. As a result, when an impact force is applied from the outside to the strap storage device in a direction from the position of the drawer opening toward the specified rotation axis due to the connecting member colliding with a portion of the case section, the relative displacement of the first peripheral edge and the second peripheral edge is further reduced by the engagement of the first and second sets of mating projections and mating holes, as well as the engagement of the third and fourth sets of mating projections and mating holes. This further reduction in relative displacement reduces the disengagement of the locking end from the locking groove around the drawer opening and at a position line-symmetrical to the position of the drawer opening, and more reliably maintains the fixed state of the first and second case sections.

1 is a perspective view of a strap storage device 1 according to a first embodiment of the present invention, showing the strap storage device 1 to which a name tag case NT is attached. 1 is an exploded perspective view of a strap storage device according to a first embodiment; FIG. 2 is a perspective view of a case section 20 of the first embodiment as viewed from the upper rear. 1A and 1B are a rear view of the interior of a case section 20 of the first embodiment, and a bottom view of the case section 20. 4 is a front view of the inside of a case section 22 of the first embodiment. FIG. This shows a front view of the two combined case halves 20, 22 of the first embodiment, as seen from the front, and a right side view of the two combined case halves 20, 22, as seen from the right. 6A shows a right-side cross-sectional view of the two case halves 20, 22 cut along line X1-X1 in FIG. 6A and viewed from the right before the two case halves 20, 22 of the first embodiment are assembled, and a bottom cross-sectional view of the two case halves 20, 22 cut along line Y1-Y1 in FIG. 6A and viewed from below. 6A shows a right-side cross-sectional view of the two case halves 20, 22 cut along line X1-X1 and viewed from the right in the state in which the two case halves 20, 22 of the first embodiment are in the middle of being assembled, and a bottom cross-sectional view of the two case halves 20, 22 cut along line Y1-Y1 and viewed from below. 6A shows a right-side cross-sectional view of the two case halves 20, 22 cut along line X1-X1 in FIG. 6A and viewed from the right after the two case halves 20, 22 have been combined in the first embodiment, and a bottom cross-sectional view of the two case halves 20, 22 cut along line Y1-Y1 in FIG. 6A and viewed from below. FIG. 11 is a perspective view of a strap storage device 101 according to a second embodiment of the present invention, showing the strap storage device 101 to which a name tag case NT is attached. FIG. 11 is an exploded perspective view of a strap storage device 101 according to a second embodiment. FIG. 11 is a perspective view of a case section 120 according to a second embodiment, as viewed from the upper rear. 13A and 13B are a rear view of the inside of a case section 120 of the second embodiment, and a bottom view of the case section 120. 13 is a front view of the inside of a case section 122 according to the second embodiment. FIG. This shows a front view of the two combined case halves 120, 122 of the second embodiment, as seen from the front, and a right side view of the two combined case halves 120, 122, as seen from the right. 15A shows a right-side cross-sectional view of the two case halves 120, 122 cut along line X2-X2 and viewed from the right after the two case halves 120, 122 of the second embodiment have been combined, and FIG. 15A shows a bottom cross-sectional view of the two case halves 120, 122 cut along line Y2-Y2 and viewed from the bottom right. FIG. 11 is a perspective view of a case section 20 of a strap storage device 201 according to a third embodiment of the present invention, as viewed from the upper rear. 13A and 13B are a rear view of the inside of a case section 20 of the third embodiment, and a bottom view of the case section 20. 13 is a front view of the inside of a case section 22 according to a third embodiment. FIG. 7A shows a right-side cross-sectional view of the two case halves 20, 22 of the third embodiment before they are assembled, taken along line X1-X1 and viewed from the right, and corresponds to FIG. 7A; and FIG. 7B shows a bottom cross-sectional view of the two case halves 20, 22 taken along line Y1-Y1 and viewed from below, respectively. 8A shows a right-side cross-sectional view of the two case halves 20, 22 of the third embodiment in the process of being assembled, the view being viewed from the right side after cutting the two case halves 20, 22 along line X1-X1, and the view being viewed from below after cutting the two case halves 20, 22 along line Y1-Y1, the view being viewed from below, the view being viewed from the right side after cutting the two case halves 20, 22 along line Y1-Y1. 9A shows a right-side cross-sectional view of the two case halves 20, 22 of the third embodiment after they have been combined, taken along line X1-X1 and viewed from the right, and corresponds to FIG. 9A; and FIG. 9B shows a bottom cross-sectional view of the two case halves 20, 22 after they have been cut along line Y1-Y1 and viewed from below, corresponding to FIG. 9B. 13 is a rear view of the inside of a case segment 20 of a strap storage device 301 according to a fourth embodiment of the present invention. FIG. FIG. 13 is a perspective view of a case section 22 according to a fourth embodiment, as viewed from the upper front. 13A and 13B are a front view of the inside of a case section 22 of a fourth embodiment, and a bottom view of the case section 22. 8A shows a right-side cross-sectional view of the two case halves 20, 22 of the fourth embodiment in the process of being assembled, the view being viewed from the right side after cutting the two case halves 20, 22 along line X1-X1, and the view being viewed from below after cutting the two case halves 20, 22 along line Y1-Y1, the view being viewed from below, the view being viewed from the right side after cutting the two case halves 20, 22 along line Y1-Y1. FIG. 13 is a perspective view of a case section 20 of a strap storage device 401 according to a fifth embodiment of the present invention, as viewed from the upper rear. 13A and 13B are a rear view of the inside of a case section 20 of the fifth embodiment, and a bottom view of the case section 20. FIG. 13 is a perspective view of a case section 22 according to a fifth embodiment, as viewed from the upper front. 13 is a front view of the inside of a case section 22 according to a fifth embodiment. FIG. 7A shows a right-side cross-sectional view of the fifth embodiment of the case halves 20, 22 cut along line X1-X1 and viewed from the right before they are assembled, and corresponds to FIG. 7A; and FIG. 7B shows a bottom cross-sectional view of the case halves 20, 22 cut along line Y1-Y1 and viewed from below.

First Embodiment
A strap storage device 1 according to a first embodiment of the present invention will be described below with reference to the drawings. Fig. 1 shows the strap storage device 1 to which a name tag case NT is attached. The three directions indicated by arrows in Fig. 1 are the up-down direction, the left-right direction, and the front-rear direction, and the same applies to Fig. 2 and the other drawings.

In FIG. 1, the strap storage device 1 comprises a knob 2 and a clip body 4. The knob 2 is fixed to the end of a string-like strap 6. The clip body 4 is provided to clamp the edge of a breast pocket of a jacket, etc., to attach the strap storage device 1 to the jacket, etc. The knob 2 is connected to the name tag case NT by an attachment member including an attachment band 8. Display items such as name cards or admission cards are stored in the name tag case NT.

[Detailed configuration of strap storage device 1]
The detailed configuration of the strap storage device 1 will be described with reference to the drawings. Fig. 2 is an exploded perspective view of the strap storage device 1. In Fig. 2, the strap storage device 1 mainly includes a pair of case halves 20, 22 and a reel assembly 23, in addition to a knob 2 and a clip body 4. The strap 6 is wound around the outer periphery of the reel assembly 23. The case halves 20, 22 are combined with each other to form a single case, and the reel assembly 23 is stored inside the case.

(Detailed configuration of case section 20)
The detailed configuration of the case section 20 will be described with reference to Figures 2 to 4. Figure 3 is a perspective view of the case section 20 as seen from the upper rear, Figure 4(A) is a drawing of the interior of the case section 20 as seen from the rear, and Figure 4(B) is a drawing of the case section 20 as seen from below.

The case split body 20 includes a front wall portion 24, a circular circumferential wall portion 26, a clip mounting protrusion 28, and a convex fixing means, and is integrally formed from a synthetic resin material. A semicircular opening 30 is formed in the lowermost portion of the circumferential wall portion 26. In FIG. 3 and FIG. 4(A), the convex fixing means is formed protruding rearward from the rear circular end face 26A of the circumferential wall portion 26. The circular peripheral end of the circumferential wall portion 26 where the rear circular end face 26A is formed defines a circular opening that opens rearward. The convex fixing means includes a first convex fixing set 32, a second convex fixing set 34, a third convex fixing set 36, a right fitting protrusion 38, and a left fitting protrusion 40. The first convex fixing set 32 is disposed at the uppermost portion of the rear circular end face 26A and includes a first locking piece 32A and a pair of first fitting protrusions 32B, 32C. The second convex fixing set 34 is disposed at the right side of the semicircular opening 30 at the lower portion of the rear circular end face 26A and includes a second locking piece 34A and a pair of second fitting protrusions 34B, 34C. The third convex fixing set 36 is disposed at the left side of the semicircular opening 30 at the lower portion of the rear circular end face 26A and includes a third locking piece 36A and a pair of third fitting protrusions 36B, 36C. The right fitting protrusion 38 is disposed at the rightmost portion of the rear circular end face 26A, and the left fitting protrusion 40 is disposed at the leftmost portion of the rear circular end face 26A. The first convex fixing set 32 is arranged at a position that is point-symmetrical with the position of the opening 30, with the center point of the circumferential wall portion 26 as the point of symmetry. In this embodiment, polycarbonate resin material is used as the synthetic resin material of the case section 20.

4A, the case segment 20 is formed in a shape that is line-symmetrical with respect to a reference line RL11 that passes through the center point of the circumferential wall portion 26 and extends in the vertical direction. The angle α12 between the second mating projections 34B, 34C about the center point of the circumferential wall portion 26 is set to the same angle as the angle α13 between the third mating projections 36B, 36C about the center point of the circumferential wall portion 26. The angle α11 between the first mating projections 32B, 32C about the center point of the circumferential wall portion 26 is set to an angle larger than the angles α12 and α13. In this embodiment, the angle α11 is set to 40 degrees, and the angles α12 and α13 are set to 30 degrees. The circumferential length of the first locking piece 32A in the circumferential direction of the circumferential wall portion 26 is set to be longer than the circumferential length of the second locking piece 34A in the circumferential direction of the circumferential wall portion 26 or the circumferential length of the third locking piece 36A in the circumferential direction of the circumferential wall portion 26. The circumferential length of the second locking piece 34A is set to be the same as the circumferential length of the third locking piece 36A. The second fitting protrusion 34B is disposed further to the right of the second fitting protrusion 34C from the reference line RL11 in the left-right direction, and the third fitting protrusion 36B is disposed further to the left of the third fitting protrusion 36C from the reference line RL11 in the left-right direction. The angle β11 between the reference line RL11 centered on the center point of the circumferential wall portion 26 and the second fitting protrusion 34B is set to the same angle as the angle β12 between the reference line RL11 centered on the center point of the circumferential wall portion 26 and the third fitting protrusion 36B. In this embodiment, each of the angles β11 and β12 is set to 45 degrees. The right fitting protrusion 38 and the left fitting protrusion 40 are disposed on a line that passes through the center point of the circumferential wall portion 26 and extends in the left-right direction, perpendicular to the reference line RL11.

Each of the locking pieces 32A, 34A, and 36A is formed in an elongated shape so that its circumferential length is sufficiently longer than its width, which is the radial length perpendicular to the circumferential direction. The mating projections 32B, 32C, 34B, 34C, 36B, 36C, 38, and 40 each have a circular cross-sectional shape with the same diameter. The first locking piece 32A has a bent locking claw 32D at the rear end. The second locking piece 34A has a bent locking claw 34D at the rear end. The third locking piece 36A has a bent locking claw 36D at the rear end. Each bent locking claw is formed to extend in a radial direction away from the center point of the circumferential wall portion 26.

4A, the circumferential interval, which is the distance from the right edge of the first locking piece 32A to the center of the first fitting protrusion 32B in the circumferential direction of the circumferential wall portion 26, is set to the same interval as the circumferential interval, which is the distance from the left edge of the first locking piece 32A to the center of the first fitting protrusion 32C in the circumferential direction of the circumferential wall portion 26, and each circumferential interval is set to an interval smaller than the circumferential length of the first locking piece 32A. The circumferential interval, which is the distance from the right edge of the second locking piece 34A to the center of the second fitting protrusion 34B in the circumferential direction of the circumferential wall portion 26, is set to approximately the same interval as the circumferential interval, which is the distance from the left edge of the second locking piece 34A to the center of the second fitting protrusion 34C in the circumferential direction of the circumferential wall portion 26, and each circumferential interval is set to an interval smaller than the circumferential length of the second locking piece 34A. The circumferential interval, which is the distance from the left edge of the third locking piece 36A to the center of the third fitting protrusion 36B in the circumferential direction of the circumferential wall portion 26, is set to approximately the same interval as the circumferential interval, which is the distance from the right edge of the third locking piece 36A to the center of the third fitting protrusion 36C in the circumferential direction of the circumferential wall portion 26, and each circumferential interval is set to an interval smaller than the circumferential length of the third locking piece 36A.

In FIG. 4B, the clip mounting protrusion 28 has a pivot shaft 28A that protrudes forward from the front wall 24, and a flange 28B. The flange 28B is disposed at the front end of the pivot shaft 28A and is formed in a substantially circular shape with a diameter sufficiently larger than that of the pivot shaft 28A. The clip body 4 has a mounting groove (not shown). The pivot shaft 28A is fitted into the mounting groove of the clip body 4 to rotatably support the clip body 4. The flange 28B prevents the clip body 4 from falling forward from the pivot shaft 28A.

(Detailed Configuration of Case Section 22)
The detailed configuration of the case section 22 will be described with reference to Figures 2 and 5. Figure 5 is a diagram showing the inside of the case section 22 as viewed from the front.

The case split body 22 includes a rear wall portion 50, a circular circumferential wall portion 52, a reel support portion 54, and a concave fixing means, and is integrally formed from a synthetic resin material. A semicircular opening 55 is formed in the lowermost portion of the circumferential wall portion 52. In Figs. 2 and 5, the concave fixing means is formed in the front circular end surface 52A of the circumferential wall portion 52, recessed toward the rear. The circular peripheral end portion of the circumferential wall portion 52 where the front circular end surface 52A is formed defines a circular opening that opens forward. The concave fixing means includes a first concave fixing set 56, a second concave fixing set 58, a third concave fixing set 60, a right fitting hole 62, and a left fitting hole 64. The first concave fixing set 56 is disposed in the uppermost portion of the front circular end face 52A and includes a first locking groove 56A and a pair of first fitting holes 56B, 56C. The second concave fixing set 58 is disposed in the lower portion of the front circular end face 52A on the right side of the semicircular opening 55 and includes a second locking groove 58A and a pair of second fitting holes 58B, 58C. The third concave fixing set 60 is disposed in the lower portion of the front circular end face 52A on the left side of the semicircular opening 55 and includes a third locking groove 60A and a pair of third fitting holes 60B, 60C. The right fitting hole 62 is disposed in the rightmost portion of the front circular end face 52A and the left fitting hole 64 is disposed in the leftmost portion of the front circular end face 52A. The first concave fixing set 56 is arranged at a position that is point-symmetrical with the position of the opening 55, with the center point of the circumferential wall portion 52 as the point of symmetry. In this embodiment, polycarbonate resin material is used as the synthetic resin material of the case section 22.

5, the case split body 22 is formed in a shape that is line-symmetrical with respect to a reference line RL12 that passes through the center point of the circumferential wall portion 52 and extends in the vertical direction. The angle α22 between the second fitting holes 58B, 58C about the center point of the circumferential wall portion 52 is set to the same angle as the angle α23 between the third fitting protrusions 60B, 60C about the center point of the circumferential wall portion 52. The angle α21 between the first fitting holes 56B, 56C about the center point of the circumferential wall portion 52 is set to an angle larger than the angles α22 and α23. In this embodiment, the angle α21 is set to 40 degrees, and the angles α22 and α23 are set to 30 degrees. The circumferential length of the first locking groove 56A in the circumferential direction of the circumferential wall portion 52 is set to be longer than the circumferential length of the second locking groove 58A in the circumferential direction of the circumferential wall portion 52 or the circumferential length of the third locking groove 60A in the circumferential direction of the circumferential wall portion 52. The circumferential length of the second locking groove 58A is set to be the same as the circumferential length of the third locking piece groove 60A. The second fitting hole 58B is disposed further to the right of the second fitting hole 58C from the reference line RL12 in the left-right direction, and the third fitting hole 60B is disposed further to the left of the third fitting hole 60C from the reference line RL12 in the left-right direction. The angle β21 between the reference line RL12 centered on the center point of the circumferential wall portion 52 and the second fitting hole 58B is set to the same angle as the angle β22 between the reference line RL12 centered on the center point of the circumferential wall portion 52 and the third fitting hole 60B. In this embodiment, each of the angles β21 and β22 is set to 45 degrees. The right fitting hole 62 and the left fitting hole 64 are located on a line that passes through the center point of the circumferential wall portion 52 and extends in the left-right direction, perpendicular to the reference line RL12.

Each of the locking grooves 56A, 58A, and 60A is formed in an elongated shape so that its circumferential length is sufficiently longer than its width, which is the radial length perpendicular to the circumferential direction. The fitting holes 56B, 56C, 58B, 58C, 60B, 60C, 62, and 64 each have a circular shape with the same diameter and are formed to be able to fit with the fitting protrusions 32B, 32C, 34B, 34C, 36B, 36C, 38, and 40. In this embodiment, the diameter of each fitting hole is set slightly larger than the diameter of each fitting protrusion. The locking grooves 56A, 58A, and 60A are formed to be able to fit with the locking pieces 32A, 34A, and 36A. Each of the locking grooves 56A, 58A, and 60A has a claw engagement groove portion in the rear portion close to the rear wall portion 50. For example, in FIG. 7A, the locking groove 56A has a claw engagement groove portion 56D in a rear portion adjacent to the rear wall portion 50. Each claw engagement groove portion is formed extending in a radial direction away from the center point of the circumferential wall portion 52. Each claw engagement groove portion is formed so as to be able to engage with the bent locking claw of each locking piece. For example, in FIG. 7A, the claw engagement groove portion 56D of the first locking groove 56A is formed so as to be able to engage with the bent locking claw 32D of the first locking piece 32A.

5, the circumferential interval, which is the distance from the right edge of the first locking groove 56A to the center of the first fitting hole 56B in the circumferential direction of the circumferential wall portion 52, is set to the same interval as the circumferential interval, which is the distance from the left edge of the first locking groove 56A to the center of the first fitting hole 56C in the circumferential direction of the circumferential wall portion 52, and each circumferential interval is set to an interval smaller than the circumferential length of the first locking groove 56A. The circumferential interval, which is the distance from the right edge of the second locking groove 58A to the center of the second fitting hole 58B in the circumferential direction of the circumferential wall portion 52, is set to approximately the same interval as the circumferential interval, which is the distance from the left edge of the second locking groove 58A to the center of the second fitting hole 58C in the circumferential direction of the circumferential wall portion 52, and each circumferential interval is set to an interval smaller than the circumferential length of the second locking groove 58A. The circumferential interval, which is the distance from the left edge of the third locking groove 60A in the circumferential direction of the circumferential wall portion 52 to the center of the third fitting hole 60B, is set to approximately the same interval as the circumferential interval, which is the distance from the right edge of the third locking groove 60A in the circumferential direction of the circumferential wall portion 52 to the center of the third fitting hole 60C, and each circumferential interval is set to an interval smaller than the circumferential length of the third locking groove 60A.

The reel support portion 54 is formed to protrude forward from the rear wall portion 50. As shown in FIG. 2, the reel support portion 54 has a pair of support shaft portions 54A, 54B and a reel locking groove 54C. The pair of support shaft portions 54A, 54B have a semicircular cross-sectional shape. The reel locking groove 54C is formed between the support shaft portions 54A, 54B.

(Detailed Configuration of Reel Assembly 23)
The detailed configuration of the reel assembly 23 will be described with reference to Fig. 2. The reel assembly 23 includes a reel body 70 and a spring 72. The reel body 70 includes a circular base portion 74, a circular flange portion 76, a storage recess 78, and a circular wall portion 79, and is integrally formed from a synthetic resin material. The circular wall portion 79 is shown in Fig. 7A. In this embodiment, ABS (acrylonitrile-butadiene-styrene copolymer) resin material is used as the synthetic resin material for the reel body 70.

The circular base portion 74 and the circular flange portion 76 are connected by the circular wall portion 79 with a predetermined gap between them. The strap 6 is wound in a clockwise direction in FIG. 2 between the outer periphery of the circular base portion 74 and the circular flange portion 76. One end of the strap 6 is fixed to the circular wall portion 79 of the reel body 70, and the knob portion 2 is fixed to the other end of the strap 6. The storage recess 78 is formed by the circular base portion 74 and the circular wall portion 79. The storage recess 78 stores the spirally wound spring 72 as shown in FIG. 2.

The support hole 80 is formed in the circular base portion 74 as shown in FIG. 2. The support hole 80 is formed in a circular shape having the same center as the circular outer periphery of the circular base portion 74. The support hole 80 is formed so that the pair of support shaft portions 54A, 54B can be inserted therethrough.

The spring spring 72 has one end that is hooked into the locking groove of the circular wall portion 79, and is wound inward in a counterclockwise direction in FIG. 2 from the end that is hooked into the locking groove. The spring spring 72 has a locking extension 82 at the other end. The locking extension 82 has a bent end 82A. The locking extension 82 extends from the other end of the spring spring 72 to near the center of the circular internal space formed by the wound spring spring 72. When the pair of support shafts 54A, 54B are inserted into the support hole 80, the locking extension 82 fits into the reel locking groove 54C and is locked.

[Operation and Function of First Embodiment]
The procedure for assembling the strap storage device 1 and the operation of pulling out and winding the strap 6 in the strap storage device 1 will be described with reference to the drawings.

(Assembling procedure for strap storage device 1)
The assembly procedure of the strap storage device 1 will be described with reference to Fig. 6 to Fig. 9. Fig. 6A is a front view of the assembled case halves 20, 22 when the case halves 20, 22 are assembled, as viewed from the front, and Fig. 6B is a right side view of the assembled case halves 20, 22 when viewed from the right. Fig. 7A is a right sectional view of the case halves 20, 22 cut along line X1-X1 shown in Fig. 6A before the case halves 20, 22 are assembled, as viewed from the right, and Fig. 7B is a bottom sectional view of the case halves 20, 22 cut along line Y1-Y1 shown in Fig. 6A, as viewed from below. Fig. 8A is a right-side cross-sectional view of the case halves 20, 22 cut along line X1-X1 in Fig. 6A when the case halves 20, 22 are in the middle of being assembled, as viewed from the right, and Fig. 8B is a bottom cross-sectional view of the case halves 20, 22 cut along line Y1-Y1 in Fig. 6A when viewed from below. Fig. 9A is a right-side cross-sectional view of the case halves 20, 22 cut along line X1-X1 in Fig. 6A when the case halves 20, 22 have been assembled, as viewed from the right, and Fig. 9B is a bottom cross-sectional view of the case halves 20, 22 cut along line Y1-Y1 in Fig. 6A when viewed from below.

<<Assembly of the reel assembly 23>>
First, the worker fixes one end of the strap 6 of a predetermined length to the circular wall portion 79 of the reel body 70, and attaches the knob portion 2 to the other end of the strap 6. After that, the worker hooks one end of the spring spring 72 into the locking groove of the circular wall portion 79 of the reel body 70 and fixes it. The worker winds the spring spring 72 inward in a counterclockwise direction in FIG. 2, and stores the wound spring spring 72 in the storage recess 78. In this stored state, the locking extension portion 82 located at the other end of the spring spring 72 extends across the support hole 80 of the reel body 70, as shown in FIG. 2. After storing the spring spring 72, the worker winds the strap 6 around the circular wall portion 79 of the reel body 70 a predetermined number of times in a clockwise direction in FIG. 2. With these operations, the assembly of the reel assembly 23 is completed.

<<Attachment of the reel assembly 23 to the case segment 22>>
To assemble the reel assembly 23 to the case section 22, the worker uses a jig, which will be described later. The worker fits the pair of support shafts 54A, 54B into the support hole 80 of the reel body 70. In this fitted state, the worker fits the locking extension 82 of the spring 72 into the reel locking groove 54C of the case section 22. This engagement causes the locking extension 82 to be locked in the reel locking groove 54C. With the locking extension 82 in the locked state, the worker inserts the other end of the strap 6 wound around the reel body 70, i.e., the other end to which the knob 2 is attached, through the opening 55 of the case section 22. From the start of the work of assembling the reel assembly 23 to the case part 22 to the end of the work of assembling the two case parts 20, 22, the knob portion 2 is held by the knob holding portion of the jig described below, so that the other end of the strap 6 does not get entangled inside the case part 22.

<Assembly of both case halves 20, 22>
A jig (not shown) is used to assemble the two case halves 20, 22. The jig includes a case holding section that holds the rear wall section 50 and the circumferential wall section 52 of the case halves 22, a pressing section that presses the reel assembly 23 toward the case halves 22 so that the reel assembly 23 does not fall off the case halves 22, a rotation operation section that rotates the case holding section a predetermined number of times, a knob holding section that holds the knob section 2 connected to the strap 6, and a pushing operation section that pushes the case halves 20 toward the case halves 22 held by the case holding section. The pressing section of the jig is configured to be displaceable between a pressing position where it presses the reel assembly 23 and a release position where it releases the pressing. The rotation operation section of the jig is configured to hold the rotation position of the case holding section after the case holding section has rotated a predetermined number of times, and is configured to be able to return to a predetermined initial operation position after the operation of assembling the two case halves 20, 22 is completed.

First, the worker holds the rear wall 50 and the circumferential wall 52 of the case section 22 with the case holding part of the jig. The worker fits the reel assembly 23 into the inside of the case section 22 and fits the locking extension 82 of the spring spring 72 into the reel locking groove 54C of the case section 22. This assembles the reel assembly 23 to the case section 22. The worker displaces the pressing part of the jig from the release position to the pressing position to press the reel assembly 23. After the displacement to the pressing position, the worker holds the knob 2 in the knob holding part of the jig with the strap 6 pulled out from the case section 22. The worker rotates the case holding part that holds the case section 22 a predetermined number of times by operating the rotation operating part of the jig. The direction of rotation of the case holding part is the direction in which the spring spring 72 of the reel assembly 23 is wound inward to accumulate elastic energy. The worker displaces the pressing portion of the jig from the pressing position to the release position to release the pressure on the reel assembly 23. In this released state, the worker inserts the other end of the strap 6 to which the knob 2 is attached through the opening 55 of the case section 22. The worker then grasps the case section 20 and positions it relative to the case section 22 so that the case section 20 faces the case section 22 to which the reel assembly 23 will be attached, as shown in Figures 7A and 7B. Specifically, the worker positions the case section 20 relative to the case section 22 so that the locking pieces 32A, 34A, and 36A of the case section 20 face the locking grooves 56A, 58A, and 60A of the case section 22, respectively, the mating protrusions 32B, 32C, 34B, 34C, 36B, and 36C of the case section 20 face the mating holes 56B, 56C, 58B, 58C, 60B, and 60C of the case section 22, respectively, and the mating protrusions 38 and 40 of the case section 20 face the mating holes 62 and 64 of the case section 22, respectively.

Next, the worker pushes the case section 20 into the case section 22 so that the locking pieces and fitting protrusions of the case section 20 are partially engaged with the locking grooves and fitting holes of the case section 22 as shown in Figures 8A and 8B, i.e., in a provisionally assembled state. For example, in the provisionally assembled state, the bent locking claw 32D of the locking piece 32A of the case section 20 engages with the locking groove 56A of the case section 22 as shown in Figure 8A, but does not yet engage with the claw engagement groove 56D of the case section 22. Also, in the provisionally assembled state, the fitting protrusions 38, 40 of the case section 20 are partially fitted into the fitting holes 62, 64 of the case section 22 as shown in Figure 8B. In the provisionally assembled state, all of the locking pieces and all of the fitting protrusions of the case section 20 are partially engaged with all of the locking grooves and all of the fitting holes of the case section 22, as shown in Figures 8(A) and 8(B), and the engagement state of both case sections 20 and 22 is maintained.

When the worker operates the pushing operation part of the jig to push the case section 20 further into the case section 22 from the provisionally assembled state, the rear circular end face 26A of the circumferential wall section 26 of the case section 20 comes into contact with the front circular end face 52A of the circumferential wall section 52 of the case section 22, as shown in Figures 9(A) and (B). In this contact state, all of the bent locking claws of the case section 20 respectively engage with all of the claw engagement grooves of the case section 22, and all of the fitting protrusions of the case section 20 fit completely into all of the fitting holes of the case section 22. For example, the bent locking claw 32D of the locking piece 32A of the case section 20 engages with the claw engagement groove 56D of the case section 22 as shown in FIG. 9A, and the fitting protrusions 38, 40 of the case section 20 fit completely into the fitting holes 62, 64 of the case section 22 as shown in FIG. 9B. When the two circular end faces 26A, 52A are in contact, the assembly of the two case sections 20, 22 is complete.

By engaging all of the bent locking claws of the case section 20 with all of the claw engagement grooves of the case section 22, the two case sections 20, 22 can be prevented from moving away from each other in the front-to-back direction in Figures 9(A) and (B). In addition, by completely fitting all of the mating protrusions of the case section 20 into all of the mating holes of the case section 22, the two case sections 20, 22 can be prevented from shifting from each other in directions perpendicular to the front-to-back direction, such as the up-down and left-to-right directions in Figures 9(A) and (B).

(Operation of pulling out and winding the strap 4)
An operator attaches the strap storage device 1 to a jacket or the like by clamping an edge of a breast pocket of the jacket with the clip body 4. When the operator grips and pulls the knob 2 or the name tag case NT against the elastic force of the spring spring 72 while the strap storage device 1 is in this attached state, the strap 6 is pulled out from the strap storage device 1 as shown in FIG. 1. When the strap 6 is pulled out, the reel assembly 23 rotates in the clockwise direction in FIG. 2 inside the case formed by both case halves 20 and 22. The reel assembly 23 is supported by the reel support portion 54 of the case halves 22, and therefore rotates around the reel support portion 54. As the reel assembly 23 rotates, the spring spring 72 is gradually wound around the reel support portion 54 inside the storage recess 78, storing elastic energy.

When the worker pulls out the strap 6 to the desired length, the worker can have a traffic detector or the like detect a display item such as an admissions card stored in the name tag case NT.

To store the pulled-out strap 6 in the strap storage device 1, the worker grasps the knob 2 or name tag case NT and moves the knob 2 or name tag case NT toward the strap storage device 1 attached to a jacket or the like. As the knob 2 or name tag case NT moves closer, a rotational force in the counterclockwise direction in FIG. 2 is applied to the reel assembly 23 by the elastic energy stored in the spring 72, causing the reel assembly 23 to rotate counterclockwise. This counterclockwise rotation winds up the pulled-out strap 6 inside the strap storage device 1.

When the worker releases the gripping portion 2 or the name tag case NT while the strap 6 is pulled out, the strap 6 is suddenly wound up inside the strap storage device 1 by the elastic energy stored in the spring 72. This sudden winding causes the gripping portion 2 to collide with the vicinity of the openings 30, 55 of both case halves 20, 22 and stop.

When the knob 2 hits the vicinity of the openings 30, 55 of both case halves 20, 22, a large impact force is applied to both case halves 20, 22 as a whole, including the vicinity of the openings 30, 55. When a large impact force is applied to both case halves 20, 22, the impact force may act on one of the case halves 20, 22 so that the one case halves is displaced in a direction perpendicular to the front-rear direction, such as the up-down direction or the left-right direction, relative to the other case halves. However, in this embodiment, the engagement of each mating protrusion of the case halves 20 with each mating hole of the case halves 22 suppresses the displacement in the direction perpendicular to the front-rear direction. As a result, the engagement between each bent locking claw of the case halves 20 and each mating groove of the case halves 22 is maintained by the engagement of each mating protrusion with each mating hole.

[Effects of the First Embodiment]
In this embodiment, the case section 20 includes a number of locking pieces 32A, 34A, 36A and a number of fitting protrusions 32B, 32C, 34B, 34C, 36B, 36C, 38, 40, and the case section 22 includes a number of locking grooves 56A, 58A, 60A and a number of fitting holes 56B, 56C, 58B, 58C, 60B, 60C, 62, 64. The two case sections 20, 22 are assembled together by the engagement of the locking pieces with the locking grooves and the fitting of the fitting protrusions with the fitting holes. As a result, the manufacturing process of the strap storage device can be simplified compared to the conventional technology in which the two case sections are welded together. In addition, engagement of each locking piece and each locking groove prevents the two case halves 20, 22 from moving apart in the front-to-rear direction in Figure 9 (A), and engagement of each mating protrusion and each mating hole prevents the two case halves 20, 22 from shifting in directions perpendicular to the front-to-rear direction, such as the up-down and left-right directions in Figure 2, and prevents the two case halves 20, 22 from shifting in the circumferential direction.

In this embodiment, as shown in (A) of FIG. 4, the second convex shape fixing set 34 and the third convex shape fixing set 36 are respectively arranged in the range of angle β11 in the clockwise direction from the reference line RL11 and in the range of angle β12 in the counterclockwise direction from the reference line RL11 in the vicinity of the opening 30. Also, as shown in FIG. 5, the second concave shape fixing set 58 and the third concave shape fixing set 60 are respectively arranged in the range of angle β21 in the counterclockwise direction from the reference line RL12 and in the range of angle β22 in the clockwise direction from the reference line RL12 in the vicinity of the opening 55. The angles β11, β12, β21, and β22 are set to acute angles of 45 degrees, and the second convex shape fixing set 34 and the third convex shape fixing set 36 are arranged in the vicinity of the openings 30 and 55. As a result, even if a large impact force is applied to the vicinity of the openings 30, 55 due to the knob 2 colliding with the vicinity of the openings 30, 55 of both case halves 20, 22, it is possible to prevent the two case halves 20, 22 from shifting in a direction perpendicular to the front-to-rear direction, and the engagement state between each of the bent locking claws of the case halves 20 and each of the claw engagement grooves of the case halves 22, particularly the engagement state between the bent locking claws 34D, 36D located in the vicinity of the openings 30, 55 and the claw engagement grooves of the locking grooves 58A, 60A, can be reliably maintained.

In this embodiment, as shown in FIG. 4A, the first convex fixing set 32 is disposed on the opposite side of the opening 30 with respect to the center point of the circumferential wall portion 26. Also, as shown in FIG. 5, the first concave fixing set 56 is disposed on the opposite side of the opening 55 with respect to the center point of the circumferential wall portion 52. As a result, even if the knob portion 2 collides from below to above with the portions near the openings 30 and 55 of both case halves 20 and 22, and a large upward impact force is applied to the portions near the openings 30 and 55, the case halves 20 and 22 can be prevented from shifting in the vertical direction, and the engagement state between all the bent locking claws of the case halves 20 and all the claw engagement grooves of the case halves 22 can be reliably maintained.

In this embodiment, each of the first to third convex fixing sets 32 to 36 has two fitting protrusions on both sides of each locking piece. Each of the first to third concave fixing sets 56 to 60 has two fitting holes on both sides of each locking groove. As a result, compared to a configuration in which only one fitting protrusion is provided on one side of each locking piece and only one fitting hole is provided on one side of each locking groove, it is possible to prevent the two case halves 20 and 22 from shifting in a direction perpendicular to the front-rear direction, and the engagement state between each bent locking claw of the case halves 20 and each claw engagement groove portion of the case halves 22, and in particular, the engagement state between the bent locking claws 34D and 36D arranged in the vicinity of the openings 30 and 55 and the claw engagement groove portions of the locking grooves 58A and 60A can be more reliably maintained.

In this embodiment, as shown in FIG. 4A, the fitting protrusions 38, 40 are arranged on a line in the left-right direction perpendicular to the reference line RL11 passing through the center point of the circumferential wall portion 26 and the position of the opening 30. Also, as shown in FIG. 5, the fitting holes 62, 64 are arranged on a line in the left-right direction perpendicular to the reference line RL12 passing through the center point of the circumferential wall portion 52 and the position of the opening 55. When attaching the strap storage device 1 to a breast pocket of a jacket or the like, an operator may accidentally drop the strap storage device 1 to the floor, causing a large impact force to be applied to both case halves 20, 22. In this case, the direction of the large impact force may be not only the up-down direction but also other directions. Even if the direction of the large impact force is other than the above, the engagement of the engagement protrusions 38, 40 with the engagement holes 62, 64 can prevent the case halves 20, 22 from shifting in directions other than the up-down direction, such as the left-right direction, and the engagement state between all of the bent locking claws of the case halves 20 and all of the claw engagement grooves of the case halves 22 can be reliably maintained.

In this embodiment, the circumferential lengths of the second locking piece 34A and the third locking piece 36A are set to a dimension smaller than the circumferential length of the first locking piece 32A, and the circumferential lengths of the second locking groove 58A and the third locking groove 60A are set to a dimension smaller than the circumferential length of the first locking groove 56A. As a result, the second mating projection 34B and the third mating projection 36B are positioned close to the opening 30, and the second mating hole 58B and the third mating hole 60B are positioned close to the opening 55. Therefore, even if a large impact force is applied to the vicinity of the openings 30, 55, the case halves 20, 22 can be prevented from shifting in a direction perpendicular to the front-to-rear direction. This makes it possible to more reliably maintain the engagement between the bent locking claws of the case halves 20 and the claw engagement grooves of the case halves 22, and in particular, the engagement between the bent locking claws 34D, 36D positioned close to the openings 30, 55 and the claw engagement grooves of the locking grooves 58A, 60A.

Second Embodiment
A strap storage device 101 according to a second embodiment of the present invention will be described below with reference to the drawings. Fig. 10 shows the strap storage device 101 to which a name tag case NT is attached. In the second embodiment, parts having the same configuration as those in the first embodiment are denoted by the same numbers.

[Detailed configuration of strap storage device 101]
The detailed configuration of the strap storage device 101 will be described with reference to the drawings. Fig. 11 is an exploded perspective view of the strap storage device 101. In Fig. 11, the strap storage device 101 mainly includes a knob 2, an attachment 102, a pair of case halves 120, 122, and a reel assembly 23. The strap 6 is wound around the outer periphery of the reel assembly 23. The case halves 120, 122 are combined with each other to form a single case, and the reel assembly 23 is stored inside the case. Note that the reel assembly 23 has the same configuration as in the first embodiment, and therefore description thereof will be omitted in the second embodiment.

In FIG. 10, the knob 2 is fixed to the end of the string-like strap 6. The attachment 102 is provided to attach the upper end portion of the strap storage device 101 to the end of the neck band 100. The knob 2 is connected to the name tag case NT by an attachment member including an attachment band 8. Display items such as name cards or admission cards are stored in the name tag case NT.

(Detailed configuration of the mounting fixture 102)
The detailed configuration of the fixture 102 will be described with reference to Fig. 11. In Fig. 11, the fixture 102 includes a pair of clamping portions 103 and 104, and is integrally formed from a synthetic resin material. In this embodiment, polycarbonate resin material is used as the synthetic resin material of the fixture 102.

The right end of the clamping part 103 is connected to the left end of the clamping part 104 so as to be able to be bent and deformed. The clamping part 103 has a circular recess 105 with an opening at the front, a number of clamping protrusions 106 arranged in two rows, and a pair of locking protrusions 107, 108. The connecting shaft part 190 of the case split body 122 fits freely into the circular recess 105. The clamping part 104 has a fitting part 109 that fits into the opening of the circular recess 105, a number of clamping protrusions 110 arranged in two rows, and a pair of locking grooves 111, 112. A circular flange part 192 is formed by protruding radially from the upper end of the connecting shaft part 190.

When both ends of the clamping parts 103 and 104 are bent and deformed, and the locking protrusions 107 and 108 engage with the locking grooves 111 and 112, the end of the neckband 100 is clamped by the multiple clamping protrusions 106 and 110. The fitting part 109 fits into the opening of the circular recess 105, and the connecting shaft part 190 is attached to the attachment tool 102. The locking protrusions 107 and 108 engage with the locking grooves 111 and 112, and the clamping state of the clamping parts 103 and 104 is maintained. The circular flange part 192 abuts against the upper end of the circular recess 105 and the upper end of the fitting part 109, preventing the attachment tool 102 from slipping out upward from the connecting shaft part 190.

(Detailed Configuration of Case Section 120)
The detailed configuration of the case section 120 will be described with reference to Figures 12 and 13. Figure 12 is a perspective view of the case section 120 as seen from the upper rear, Figure 13(A) is a drawing of the interior of the case section 120 as seen from the rear, and Figure 13(B) is a drawing of the case section 120 as seen from below.

The case split body 120 includes a front wall portion 124, a circular circumferential wall portion 126, and a convex fixing means, and is integrally formed from a synthetic resin material. A semicircular opening 130 is formed in the lowermost portion of the circumferential wall portion 126, and a semicircular opening 194 is formed in the uppermost portion of the circumferential wall portion 126. In FIG. 12 and FIG. 13 (A), the convex fixing means is formed protruding rearward from the rear circular end face 126A of the circumferential wall portion 126. The circular peripheral end of the circumferential wall portion 126 where the rear circular end face 126A is formed defines a circular opening that opens rearward. The convex fixing means includes a first convex fixing set 132, a second convex fixing set 133, a third convex fixing set 134, a fourth convex fixing set 136, a right fitting protrusion 138, and a left fitting protrusion 140. The first convex fixing set 132 is disposed on the right side of the semicircular opening 194 in the upper part of the rear circular end face 126A, and includes a first locking piece 132A and a first fitting protrusion 132B. The second convex fixing set 133 is disposed on the left side of the semicircular opening 194 in the upper part of the rear circular end face 126A, and includes a second locking piece 133A and a second fitting protrusion 133B. The third convex fixing set 134 is disposed on the right side of the semicircular opening 130 in the lower part of the rear circular end face 126A, and includes a third locking piece 134A and a third fitting protrusion 134B. The fourth convex fixing set 136 is disposed on the left side of the semicircular opening 130 in the lower part of the rear circular end face 126A, and includes a fourth locking piece 136A and a fourth fitting protrusion 136B. The right fitting protrusion 138 is located at the rightmost portion of the rear circular end face 126A, and the left fitting protrusion 140 is located at the leftmost portion of the rear circular end face 126A. In this embodiment, polycarbonate resin material is used as the synthetic resin material of the case section 120.

13A, the case split body 120 is formed in a shape that is line-symmetrical with respect to a reference line RL21 that passes through the center point of the circumferential wall portion 126 and extends in the up-down direction, and is formed in a shape that is approximately line-symmetrical with respect to a line that passes through the center point of the circumferential wall portion 126 and is perpendicular to the reference line RL21. The first to fourth locking pieces 132A to 136A in the circumferential direction of the circumferential wall portion 126 have the same circumferential length. The first fitting protrusion 132B is positioned further to the right of the first locking piece 132A from the reference line RL21 in the left-right direction, and the second fitting protrusion 133B is positioned further to the left of the second locking piece 133A from the reference line RL21 in the left-right direction. The third fitting protrusion 134B is disposed further to the right of the third locking piece 134A from the reference line RL21 in the left-right direction, and the fourth fitting protrusion 136B is disposed further to the left of the fourth locking piece 136A from the reference line RL21 in the left-right direction. An angle β31 between the reference line RL21 centered on the center point of the circumferential wall portion 126 and the first fitting protrusion 132B is set to the same angle as an angle β32 between the reference line RL21 centered on the center point of the circumferential wall portion 126 and the second fitting protrusion 133B. An angle β33 between the reference line RL21 centered on the center point of the circumferential wall portion 126 and the third fitting protrusion 134B is set to the same angle as an angle β34 between the reference line RL21 centered on the center point of the circumferential wall portion 126 and the fourth fitting protrusion 136B. In this embodiment, each of angles β31 to β34 is set to 40 degrees. The right fitting protrusion 138 and the left fitting protrusion 140 are disposed on a line that passes through the center point of the circumferential wall portion 126 and extends in the left-right direction, perpendicular to the reference line RL21.

Each of the first to fourth locking pieces 132A to 136A is formed in an elongated shape so that its circumferential length is sufficiently longer than its width, which is the length in the radial direction perpendicular to the circumferential direction. The fitting protrusions 132B, 133B, 134B, 136B, 138, and 140 each have a circular cross-sectional shape with the same diameter. The first locking piece 132A has a bent locking claw 32D at the rear end. The second locking piece 133A has a bent locking claw 133D at the rear end. The third locking piece 134A has a bent locking claw 134D at the rear end. The fourth locking piece 136A has a bent locking claw 136D at the rear end. Each bent locking claw is formed to extend in a radial direction away from the center point of the circumferential wall portion 126.

13A, the circumferential interval, which is the distance from the right edge of the first locking piece 132A in the circumferential direction of the circumferential wall portion 126 to the center of the first fitting protrusion 132B, is set to an interval smaller than the circumferential interval, which is the distance from the left edge of the first locking piece 132A in the circumferential direction of the circumferential wall portion 126 to the right edge 194A of the opening 194 shown in Fig. 13A. Each circumferential interval is set to an interval smaller than the circumferential length of the first locking piece 132A. The circumferential interval, which is the distance from the left edge of the second locking piece 133A to the center of the second fitting protrusion 133B in the circumferential direction of the circumferential wall portion 126, is set to an interval smaller than the circumferential interval, which is the distance from the right edge of the second locking piece 133A in the circumferential direction of the circumferential wall portion 126 to the left edge 194B of the opening 194 shown in Fig. 13A. Each circumferential interval is set to an interval smaller than the circumferential length of the second locking piece 132A. The circumferential interval, which is the distance from the right edge of the third locking piece 134A to the center of the third fitting protrusion 134B in the circumferential direction of the circumferential wall portion 126, is set to an interval smaller than the circumferential interval, which is the distance from the left edge of the third locking piece 134A in the circumferential direction of the circumferential wall portion 126 to the right edge 130A of the opening 130 shown in Fig. 13A. Each circumferential interval is set to an interval smaller than the circumferential length of the third locking piece 134A. The circumferential interval, which is the distance from the left edge of the fourth locking piece 136A in the circumferential direction of the circumferential wall portion 126 to the center of the fourth fitting protrusion 136B, is set to an interval smaller than the circumferential interval, which is the distance from the right edge of the fourth locking piece 136A in the circumferential direction of the circumferential wall portion 126 to the left edge 130B of the opening 130 shown in FIG. 13A. Each circumferential interval is set to an interval smaller than the circumferential length of the fourth locking piece 136A.

(Detailed Configuration of Case Section 122)
The detailed configuration of the case section 122 will be described with reference to Figures 11 and 14. Figure 14 is a diagram showing the inside of the case section 122 as viewed from the front.

The case split body 122 includes a rear wall portion 150, a circular circumferential wall portion 152, a reel support portion 154, and a concave fixing means, and is integrally formed from a synthetic resin material. A connecting shaft portion 190 is formed at the uppermost portion of the circumferential wall portion 152, protruding upward from the outer periphery of the circumferential wall portion 152. A semicircular opening 155 is formed at the lowermost portion of the circumferential wall portion 152. In Figures 11 and 14, the concave fixing means is formed in the front circular end surface 152A of the circumferential wall portion 152, recessed toward the rear. The circular peripheral end of the circumferential wall portion 152 where the front circular end surface 152A is formed defines a circular opening that opens forward. The concave fixing means includes a first concave fixing set 156, a second concave fixing set 157, a third concave fixing set 158, a fourth concave fixing set 160, a right fitting hole 162, and a left fitting hole 164. The first concave fixing set 156 is disposed on the right side of the connecting shaft part 190 in the upper part of the front circular end face 152A, and includes a first locking groove 156A and a first fitting hole 156B. The second concave fixing set 157 is disposed on the left side of the connecting shaft part 190 in the upper part of the front circular end face 152A, and includes a second locking groove 157A and a second fitting hole 157B. The third concave fixing set 158 is disposed to the right of the semicircular opening 155 in the lower portion of the front circular end face 152A and includes a third locking groove 158A and a third fitting hole 158B. The fourth concave fixing set 160 is disposed to the left of the semicircular opening 155 in the lower portion of the front circular end face 152A and includes a fourth locking groove 160A and a fourth fitting hole 160B. The right fitting hole 162 is disposed in the rightmost portion of the front circular end face 152A, and the left fitting hole 164 is disposed in the leftmost portion of the front circular end face 152A. In this embodiment, polycarbonate resin material is used as the synthetic resin material of the case section 122.

14, the case split body 122 is formed in a shape that is line-symmetrical with respect to a reference line RL22 that passes through the center point of the circumferential wall portion 152 and extends in the up-down direction, and is formed in a shape that is approximately line-symmetrical with respect to a line that passes through the center point of the circumferential wall portion 152 and is perpendicular to the reference line RL22. The circumferential lengths of the first to fourth locking grooves 156A to 160A in the circumferential direction of the circumferential wall portion 152 are set to the same circumferential length. The first fitting hole 156B is positioned further to the right of the first locking groove 156A from the reference line RL22 in the left-right direction, and the second fitting hole 157B is positioned further to the left of the second locking groove 157A from the reference line RL22 in the left-right direction. The third fitting hole 158B is disposed further to the right of the third locking groove 158A from the reference line RL22 in the left-right direction, and the fourth fitting hole 160B is disposed further to the left of the fourth locking groove 160A from the reference line RL22 in the left-right direction. An angle β41 between the reference line RL22 centered on the center point of the circumferential wall portion 126 and the first fitting hole 156B is set to the same angle as an angle β42 between the reference line RL22 centered on the center point of the circumferential wall portion 126 and the second fitting hole 157B. An angle β43 between the reference line RL22 centered on the center point of the circumferential wall portion 126 and the third fitting hole 158B is set to the same angle as an angle β44 between the reference line RL22 centered on the center point of the circumferential wall portion 126 and the fourth fitting hole 160B. In this embodiment, each of angles β41 to β44 is set to 40 degrees. The right fitting hole 162 and the left fitting hole 164 are located on a line that passes through the center point of the circumferential wall portion 152 and extends in the left-right direction, perpendicular to the reference line RL22.

Each of the first to fourth locking grooves 156A to 160A is formed in an elongated shape so that its circumferential length is sufficiently longer than its width, which is the radial length perpendicular to the circumferential direction. The fitting holes 156B, 158B, 160B, 162, and 164 each have a circular shape with the same diameter and are formed so as to be able to fit with the fitting protrusions 132B, 133B, 134B, 136B, 138, and 140. In this embodiment, the diameter of each fitting hole is set slightly larger than the diameter of each fitting protrusion. The first to fourth locking grooves 156A to 160A are formed so as to be able to fit with the first to fourth locking pieces 132A to 136A. Each of the first to fourth locking grooves 156A to 160A has a claw engagement groove portion in the rear portion close to the rear wall portion 150. For example, in FIG. 16B, the locking groove 156A has a claw engagement groove 156D in a rear portion adjacent to the rear wall portion 150. Each claw engagement groove is formed to extend in a radial direction away from the center point of the circumferential wall portion 152. Each claw engagement groove is formed so as to be able to engage with the bent locking claw of each locking piece. For example, in FIG. 16B, the claw engagement groove 156D of the first locking groove 156A is formed so as to be able to engage with the bent locking claw 132D of the first locking piece 132A.

14, the circumferential interval, which is the distance from the right edge of the first locking groove 156A in the circumferential direction of the circumferential wall portion 152 to the center of the first fitting hole 156B, is set to an interval smaller than the circumferential interval, which is the distance from the left edge of the first locking groove 156A in the circumferential direction of the circumferential wall portion 152 to the right edge 190A of the connecting shaft portion 190 shown in FIG. 14. Each circumferential interval is set to an interval smaller than the circumferential length of the first locking groove 156A. The circumferential interval, which is the distance from the left edge of the second locking groove 157A in the circumferential direction of the circumferential wall portion 152 to the center of the second fitting hole 157B, is set to an interval smaller than the circumferential interval, which is the distance from the right edge of the second locking groove 157A in the circumferential direction of the circumferential wall portion 152 to the left edge 190B of the connecting shaft portion 190 shown in FIG. Each circumferential interval is set to an interval smaller than the circumferential length of the second locking groove 157A. The circumferential interval, which is the distance from the right edge of the third locking groove 158A in the circumferential direction of the circumferential wall portion 152 to the center of the third fitting hole 158B, is set to an interval smaller than the circumferential interval, which is the distance from the left edge of the third locking groove 158A in the circumferential direction of the circumferential wall portion 152 to the right edge 155A of the opening 155 shown in FIG. 14. Each circumferential interval is set to an interval smaller than the circumferential length of the third locking groove 158A. The circumferential interval, which is the distance from the left edge of the fourth locking groove 160A in the circumferential direction of the circumferential wall portion 152 to the center of the fourth fitting hole 160B, is set to an interval smaller than the circumferential interval, which is the distance from the right edge of the fourth locking groove 160A in the circumferential direction of the circumferential wall portion 152 to the left edge 155B of the opening 155 shown in FIG. 14. Each circumferential interval is set to an interval smaller than the circumferential length of the fourth locking groove 160A.

The reel support portion 154 is formed to protrude forward from the rear wall portion 150. As shown in FIG. 11, the reel support portion 154 has a pair of support shaft portions 154A, 154B and a reel locking groove 154C. The pair of support shaft portions 154A, 154B have a semicircular cross-sectional shape. The reel locking groove 154C is formed between the support shaft portions 154A, 154B.

[Operation and Function of the Second Embodiment]
The procedure for assembling the strap storage device 101 will be described with reference to the drawings. Note that the operation of pulling out and winding the strap 6 in the strap storage device 101 is the same as that in the first embodiment, and therefore the description thereof will be omitted in the second embodiment.

(Assembling procedure of strap storage device 101)
The procedure for assembling the strap storage device 101 will be described with reference to Figures 15 and 16. Note that the procedure for assembling the reel assembly 23 and the procedure for attaching the reel assembly 23 to the case section 22 are the same as those in the first embodiment, and therefore will not be described in the second embodiment. Figure 15(A) is a front view of the combined case sections 120, 122 as seen from the front, and Figure 15(B) is a right side view of the combined case sections 120, 122 as seen from the right. FIG. 16A is a right-side cross-sectional view of the two case halves 120, 122 cut along line X2-X2 shown in FIG. 15A when the two case halves 120, 122 are assembled together, as viewed from the right, and FIG. 16B is a cross-sectional view of the two case halves 120, 122 cut along line Y2-Y2 shown in FIG. 15A, as viewed from the lower right.

<Assembly of Both Case Split Bodies 120, 122>
As in the first embodiment, a jig (not shown) is used to assemble both case halves 120 and 122. The worker positions case halves 120 relative to case halves 122 so that case halves 120 faces case halves 122 to which reel assembly 23 is to be assembled. Specifically, the worker positions case section 120 relative to case section 122 so that the first to fourth locking pieces 132A to 136A of case section 120 face the first to fourth locking grooves 156A to 160A of case section 122, respectively, the first to fourth mating protrusions 132B to 136B of case section 120 face the first to fourth mating holes 156B to 160B of case section 122, respectively, and the mating protrusions 138, 140 of case section 120 face the mating holes 162, 164 of case section 122, respectively.

Next, the operator pushes the case section 120 into the case section 122 so that the locking pieces and fitting protrusions of the case section 120 are partially engaged with the locking grooves and fitting holes of the case section 122, as shown in Figures 8A and 8B, that is, in a provisionally assembled state. For example, in the provisionally assembled state, the bent locking claw 132D of the locking piece 132A of the case section 120 is engaged with the locking groove 156A of the case section 120, as shown in Figure 8A, but is not yet engaged with the claw engagement groove 156D of the case section 120. Also, in the provisionally assembled state, the fitting protrusions 138, 140 of the case section 120 are partially fitted into the fitting holes 162, 164 of the case section 122, as shown in Figure 8B. In the provisionally assembled state, all of the locking pieces and all of the mating protrusions of the case section 120 are partially engaged with all of the locking grooves and all of the mating holes of the case section 122, as shown in Figures 8(A) and 8(B), and the engagement state of both case sections 120 and 122 is maintained.

When the worker pushes the case section 120 further into the case section 122 from the provisionally assembled state, the rear circular end surface 126A of the circumferential wall portion 126 of the case section 120 abuts against the front circular end surface 152A of the circumferential wall portion 152 of the case section 122. In this abutting state, all the bent locking claws of the case section 120 engage with all the claw engagement grooves of the case section 122, and all the fitting protrusions of the case section 120 fit completely into all the fitting holes of the case section 122. For example, the bent locking claw 132D of the locking piece 132A of the case section 120 and the bent locking claw 136D of the locking piece 136A of the case section 120 engage with the claw engagement groove portion 156D and the claw engagement groove portion 160D of the case section 122, respectively, as shown in FIG. 16B. When the two circular end faces 126A, 152A are in contact with each other, the assembly of the two case halves 120, 122 is complete. When the assembly of the two case halves 120, 122 is complete, the front portion of the outer circumferential surface of the connecting shaft portion 190 of the case halves 122 engages with the inner circumferential surface of the opening 194 of the case halves 120, as shown in FIG. 16A.

By engaging all of the bent locking claws of the case section 120 with all of the claw engagement grooves of the case section 122, the two case sections 120, 122 can be prevented from moving away from each other in the front-to-back direction in Figures 16(A) and 16(B). In addition, by completely fitting all of the mating protrusions of the case section 120 into all of the mating holes of the case section 122, the two case sections 120, 122 can be prevented from shifting from each other in directions perpendicular to the front-to-back direction, such as the up-down and left-to-right directions in Figures 16(A) and 16(B).

<Attachment of the mounting fixture 102 to the connecting shaft portion 190>
After completing the assembly of both case halves 120, 122, the worker fits the connecting shaft 190 of the case halves 122 into the circular recess 105 of the clamping part 103 which is not bent as shown in Fig. 11. Next, with the end of the neck strap 100 positioned on the multiple clamping protrusions 106, the worker bends both side ends of the clamping parts 103, 104 to engage the locking protrusions 107, 108 with the locking grooves 111, 112. When the locking protrusions 107, 108 engage with the locking grooves 111, 112, the end of the neck strap 100 is clamped by the multiple clamping protrusions 106, 110. The fitting part 109 fits into the opening of the circular recess 105, and the connecting shaft 190 is attached to the attachment tool 102.

[Effects of the second embodiment]
In this embodiment, as shown in Fig. 13A, the first convex fixing set 132 and the second convex fixing set 133 are disposed on the opposite side of the opening 130 with respect to the center point of the circumferential wall portion 126. Also, as shown in Fig. 14, the first concave fixing set 156 and the second concave fixing set 157 are disposed on the opposite side of the opening 155 with respect to the center point of the circumferential wall portion 152. As a result, even if the knob portion 2 collides from below to above with the portions near the openings 130 and 155 of both case halves 120 and 122, and a large upward impact force is applied to the portions near the openings 130 and 155, it is possible to prevent both case halves 120 and 122 from shifting in the up-down direction, and the engagement state between all the bent locking claws of the case halves 120 and all the claw engagement grooves of the case halves 122 can be reliably maintained.

In this embodiment, as shown in FIG. 13A, the third fitting protrusion 134B is disposed further to the right from the opening 130 than the third locking piece 134A, and the fourth fitting protrusion 136B is disposed further to the left from the opening 130 than the fourth locking piece 136A. As shown in FIG. 14, the third fitting hole 158B is disposed further to the right from the opening 155 than the third locking groove 158A, and the fourth fitting hole 160B is disposed further to the left from the opening 155 than the fourth locking groove 160A. As a result, compared to a configuration in which each fitting protrusion is disposed between the opening 130 and each locking piece and each fitting hole is disposed between the opening 155 and each locking groove, the locking pieces 134A and 136A are disposed as close as possible to the opening 130, and the locking grooves 158A and 160A are disposed as close as possible to the opening 155. Since each locking piece and each locking groove is positioned as close as possible to the openings 130, 155, even if the knob 2 collides from below to above the portions of the case halves 120, 122 near the openings 130, 155, and a large upward impact force is applied to the portions near the openings 130, 155, the front-to-rear engagement state of the case halves 120, 122 can be more firmly maintained in the portions near the openings 130, 155. Here, the position as close as possible is a position where the physical strength of each locking piece and each locking groove can be sufficiently ensured.

In this embodiment, as shown in FIG. 13A, the first fitting protrusion 132B is disposed further to the right from the opening 194 than the first locking piece 132A, and the second fitting protrusion 133B is disposed further to the left from the opening 194 than the second locking piece 133A. As shown in FIG. 14, the first fitting hole 156B is disposed further to the right from the connecting shaft portion 190 than the first locking groove 156A, and the second fitting hole 157B is disposed further to the left from the connecting shaft portion 190 than the second locking groove 157A. As a result, compared to a configuration in which each fitting protrusion is disposed between the opening 194 and each locking piece and each fitting hole is disposed between the connecting shaft portion 190 and each locking groove, the locking pieces 132A and 133A are disposed as close as possible to the opening 194, and the locking grooves 156A and 157A are disposed as close as possible to the connecting shaft portion 190. Since each locking piece and each locking groove is positioned as close as possible to the opening 194 and the connecting shaft 190, the front-to-rear engagement state of the two case halves 120, 122 can be more firmly maintained in the vicinity of the opening 194 and the connecting shaft 190. Here, the position as close as possible is a position where the physical strength of each locking piece and each locking groove can be sufficiently secured.

For the configuration of the second embodiment that is the same as that of the first embodiment, the second embodiment has the same effect as that of the first embodiment.

Third Embodiment
A strap storage device 201 according to a third embodiment of the present invention will be described below with reference to the drawings. The third embodiment differs from the first embodiment in that first to fourth fitting walls 210, 212, 214, and 216 are additionally provided to the case section 20 of the first embodiment, and first to third fitting inner circumferential surfaces 218, 220, and 222 are additionally provided to the case section 22 of the first embodiment. In the third embodiment, parts having the same configuration as those in the first embodiment are indicated by the same numbers, and their description will be omitted. Only the configuration of the third embodiment that differs from the first embodiment will be described below.

(Detailed configuration of case section 20)
The detailed configuration of the case section 20 will be described with reference to Figures 17 and 18. Figure 17 is a perspective view of the case section 20 as seen from the upper rear, Figure 18(A) is a drawing of the interior of the case section 20 as seen from the rear, and Figure 18(B) is a drawing of the case section 20 as seen from below.

The case split body 20 includes a front wall portion 24, a circular circumferential wall portion 26, a clip mounting protrusion 28, a convex fixing means, and first to fourth mating wall portions 210, 212, 214, and 216, and is integrally formed from a synthetic resin material. The first to fourth mating wall portions 210, 212, 214, and 216 are formed in an arc shape centered on the center point of the circumferential wall portion 26 on the inner periphery of the circumferential wall portion 26. The first mating wall portion 210 extends continuously in the counterclockwise direction in FIG. 18A from the vicinity of the right edge of the first locking piece 32A to the vicinity of the right edge of the second locking piece 34A. The second fitting wall 212 extends continuously in the clockwise direction in Fig. 18A from the vicinity of the left end edge of the first locking piece 32A to the vicinity of the left end edge of the third locking piece 36A. The third fitting wall 214 is disposed between the left end edge of the second locking piece 34A and the opening 30. The fourth fitting wall 216 is disposed between the right end edge of the third locking piece 36A and the opening 30. The protruding length of each of the first to fourth fitting walls 210, 212, 214, 216 protruding rearward from the rear circular end face 26A of the circumferential wall 26 is set to be longer than the protruding length of each of the fitting protrusions 32B, 32C, 34B, 34C, 36B, 36C, 38, 40 protruding rearward from the rear circular end face 26A, as shown in Fig. 18B. In addition, the length by which each fitting wall portion protrudes rearward from the rear circular end surface 26A of the circumferential wall portion 26 is set to a length slightly smaller than the length by which each of the first to third locking pieces 32A, 34A, and 36A protrudes rearward from the rear circular end surface 26A, as shown in FIG. 18(B) and FIG. 20(A).

In FIG. 18A, the case split body 20 is formed in a shape that is line-symmetrical with respect to a reference line RL11 that passes through the center point of the circumferential wall portion 26 and extends in the vertical direction. The first mating wall portion 210 and the third mating wall portion 214 are positioned line-symmetrical with the second mating wall portion 212 and the fourth mating wall portion 216 with respect to the reference line RL11.

(Detailed Configuration of Case Section 22)
The detailed configuration of the case section 22 will be described with reference to Fig. 19. Fig. 19 is a diagram showing the inside of the case section 22 as viewed from the front.

The case split body 22 includes a rear wall portion 50, a circular circumferential wall portion 52, a reel support portion 54, a concave fixing means, and first to third mating inner peripheral surfaces 218, 220, 222, which are integrally formed from a synthetic resin material. The first to third mating inner peripheral surfaces 218, 220, 222 are formed in an arc shape centered on the center point of the circumferential wall portion 52 on the inner periphery of the circumferential wall portion 52. The first mating inner peripheral surface 218 extends continuously in the clockwise direction in FIG. 19 from the vicinity of the right edge of the first locking groove 56A to the vicinity of the right edge of the second locking groove 58A. The second mating inner peripheral surface 220 extends continuously in the counterclockwise direction in FIG. 19 from the vicinity of the left edge of the first locking groove 56A to the vicinity of the left edge of the third locking groove 60A. The third mating inner peripheral surface 222 is disposed between the left edge of the second locking groove 58A and the right edge of the third locking groove 60A.

In FIG. 19, the case split body 22 is formed in a shape that is line-symmetrical with respect to a reference line RL12 that passes through the center point of the circumferential wall portion 52 and extends in the vertical direction. The first mating inner circumferential surface 218 is disposed in a position that is line-symmetrical with the second mating inner circumferential surface 220 with respect to the reference line RL12. The third mating inner circumferential surface 222 is formed in a shape that is line-symmetrical with respect to the reference line RL12.

[Operation and Function of the Third Embodiment]
The procedure for assembling the strap storage device 201 will be described with reference to the drawings. Note that the operation of pulling out and winding the strap 6 in the strap storage device 201 is the same as that in the first embodiment, and therefore the description thereof will be omitted in the third embodiment.

(Assembling procedure for strap storage device 201)
The procedure for assembling the strap storage device 201 will be described with reference to Figs. 20 to 22. The procedure for assembling the reel assembly 23 and the procedure for attaching the reel assembly 23 to the case section 22 are the same as those in the first embodiment, and therefore will not be described in the third embodiment. Figs. 20A and 20B show the state before the two case sections 20 and 22 are assembled, and correspond to Figs. 7A and 7B. Figs. 21A and 21B show the state during the assembly of the two case sections 20 and 22, and correspond to Figs. 8A and 8B. Figs. 22A and 22B show the state after the two case sections 20 and 22 have been assembled, and correspond to Figs. 9A and 9B.

<Assembly of both case halves 20, 22>
As in the first embodiment, a jig (not shown) is used to assemble both case halves 20 and 22. As shown in Figures 20A and 20B, the worker positions the case halves 20 relative to the case halves 22 so that the case halves 20 faces the case halves 22 to which the reel assembly 23 is to be assembled. Specifically, the worker positions case section 20 relative to case section 22 so that locking pieces 32A, 34A, 36A of case section 20 face locking grooves 56A, 58A, 60A of case section 22, respectively, mating protrusions 32B, 32C, 34B, 34C, 36B, 36C of case section 20 face mating holes 56B, 56C, 58B, 58C, 60B, 60C of case section 22, respectively, and mating protrusions 38, 40 of case section 20 face mating holes 62, 64 of case section 22, respectively. When the two case halves 20, 22 are positioned facing each other, the first to fourth mating wall portions 210, 212, 214, 216 are positioned slightly forward and away from the first to third mating inner surfaces 218, 220, 222, as shown in Figures 20 (A) and (B).

Next, the worker pushes the case section 20 into the case section 22 so that the locking pieces and fitting protrusions of the case section 20 are partially engaged with the locking grooves and fitting holes of the case section 22 as shown in Figures 21(A) and (B), i.e., a temporary assembly state. For example, in the temporary assembly state, the bent locking claw 32D of the locking piece 32A of the case section 20 engages with the locking groove 56A of the case section 20 as shown in Figure 21(A), but is not yet engaged with the claw engagement groove portion 56D of the case section 20. In the temporary assembly state, the fitting protrusions 38, 40 of the case section 20 are partially fitted into the fitting holes 62, 64 of the case section 22 as shown in Figure 21(B). In the provisionally assembled state, all of the locking pieces and all of the fitting protrusions of the case section 20 are partially engaged with all of the locking grooves and all of the fitting holes of the case section 22 as shown in (A) and (B) of FIG. 21, and the engagement state of both case sections 20 and 22 is maintained. When the provisionally assembled state is reached, the first to fourth fitting walls 210, 212, 214, and 216 are partially engaged with the first to third fitting inner circumferential surfaces 218, 220, and 222. After the partial engagement of each fitting wall with each fitting inner circumferential surface, the fitting protrusions 32B, 32C, 34B, 34C, 36B, 36C, 38, and 40 are partially engaged with the fitting holes 56B, 56C, 58B, 58C, 60B, 60C, 62, and 64, and the provisionally assembled state shown in (A) and (B) of FIG. 21 is reached.

When the worker pushes the case section 20 further into the case section 22 from the provisionally assembled state, the rear circular end surface 26A of the circumferential wall portion 26 of the case section 20 abuts against the front circular end surface 52A of the circumferential wall portion 52 of the case section 22, as shown in Figures 22(A) and (B). In this abutting state, all of the bent locking claws of the case section 20 engage with all of the claw engagement grooves of the case section 22, and all of the fitting protrusions of the case section 20 fit completely into all of the fitting holes of the case section 22. For example, the bent locking claw 32D of the locking piece 32A of the case section 20 engages with the claw engagement groove portion 56D of the case section 22 as shown in Figure 22(A), and the fitting protrusions 38, 40 of the case section 20 fit completely into the fitting holes 62, 64 of the case section 22 as shown in Figure 22(B). When the circular end faces 26A and 52A are in contact with each other, the assembly of the two case halves 20 and 22 is complete. When the assembly of the two case halves 20 and 22 is complete, the first through fourth mating walls 210, 212, 214, and 216 are completely mated up to the rear portions of the first through third mating inner circumferential surfaces 218, 220, and 222, as shown in Figures 22A and 22B.

By engaging all the bent locking claws of the case section 20 with all the claw engagement grooves of the case section 22, the two case sections 20, 22 can be prevented from moving away from each other in the front-to-rear direction in Figures 22(A) and (B). In addition, by completely fitting all the mating protrusions of the case section 20 into all the mating holes of the case section 22, and completely fitting the first to fourth mating wall sections 210, 212, 214, 216 to the rear portions of the first to third mating inner circumferential surfaces 218, 220, 222, the two case sections 20, 22 can be reliably prevented from shifting from each other in directions perpendicular to the front-to-rear direction, such as the up-down and left-right directions in Figures 22(A) and (B).

[Effects of the third embodiment]
In this embodiment, the case section 20 includes a number of locking pieces 32A, 34A, 36A and a number of fitting protrusions 32B, 32C, 34B, 34C, 36B, 36C, 38, 40, and the case section 22 includes a number of locking grooves 56A, 58A, 60A and a number of fitting holes 56B, 56C, 58B, 58C, 60B, 60C, 62, 64. Furthermore, the case section 20 includes a number of fitting walls 210, 212, 214, 216, and the case section 22 includes a number of fitting inner circumferential surfaces 218, 220, 222. The two case sections 20, 22 are assembled to each other by engagement between the locking pieces and the locking grooves, fitting between the fitting protrusions and the fitting holes, and fitting between the fitting walls and the fitting inner circumferential surfaces. As a result, the manufacturing process of the strap storage device can be simplified compared to the conventional technology in which both case halves are welded together. Also, the fitting of the fitting walls and the fitting inner peripheral surfaces reliably prevents the two case halves 20, 22 from shifting relative to each other in directions perpendicular to the front-rear direction, such as the up-down and left-right directions in Figures 22A and 22B.

In this embodiment, the protruding length of each of the first to fourth mating wall portions 210, 212, 214, 216 protruding rearward from the rear circular end face 26A of the circumferential wall portion 26 is set to a length greater than the protruding length of each of the mating protrusions 32B, 32C, 34B, 34C, 36B, 36C, 38, 40 protruding rearward from the rear circular end face 26A, as shown in FIG. 18 (B). As a result, when the temporary assembly is completed, the first to fourth mating walls 210, 212, 214, 216 begin to partially engage with the first to third mating inner circumferential surfaces 218, 220, 222 before the mating protrusions 32B, 32C, 34B, 34C, 36B, 36C, 38, 40 partially engage with the mating holes 56B, 56C, 58B, 58C, 60B, 60C, 62, 64. By first partially engaging each mating wall with each mating inner circumferential surface, the worker can easily position each mating protrusion relative to each mating hole in the left-right and up-down directions.

For the configuration of the third embodiment that is the same as that of the first embodiment, the third embodiment has the same effect as that of the first embodiment.

Fourth Embodiment
A strap storage device 301 according to a fourth embodiment of the present invention will be described below with reference to the drawings. The fourth embodiment differs from the first embodiment in that first to third fitting inner circumferential surfaces 318, 320, and 322 are additionally provided to the case section 20 of the first embodiment, and first to fourth fitting walls 310, 312, 314, and 316 are additionally provided to the case section 22 of the first embodiment. In the fourth embodiment, parts having the same configuration as those in the first embodiment are indicated by the same numbers, and their description will be omitted. Only the configuration of the fourth embodiment that differs from the first embodiment will be described below.

(Detailed configuration of case section 20)
The detailed configuration of the case section 20 will be described with reference to Fig. 23. Fig. 23 is a diagram showing the inside of the case section 20 as viewed from the rear.

The case split body 20 includes a front wall portion 24, a circular circumferential wall portion 26, a clip mounting protrusion 28, a convex fixing means, and first to third mating inner peripheral surfaces 318, 320, 322, which are integrally formed from a synthetic resin material. The first to third mating inner peripheral surfaces 318, 320, 322 are formed in an arc shape centered on the center point of the circumferential wall portion 26 on the inner periphery of the circumferential wall portion 26. The first mating inner peripheral surface 318 extends continuously in the counterclockwise direction in FIG. 23 from the vicinity of the right edge of the first locking piece 32A to the vicinity of the right edge of the second locking piece 34A. The second mating inner peripheral surface 320 extends continuously in the clockwise direction in FIG. 23 from the vicinity of the left edge of the first locking piece 32A to the vicinity of the left edge of the third locking piece 36A. The third mating inner peripheral surface 322 is disposed between the left edge of the second locking piece 34A and the right edge of the third locking piece 36A.

In FIG. 23, the case split body 20 is formed in a shape that is line-symmetrical with respect to a reference line RL11 that passes through the center point of the circumferential wall portion 26 and extends in the vertical direction. The first mating inner circumferential surface 318 is disposed in a position that is line-symmetrical with the second mating inner circumferential surface 320 with respect to the reference line RL11. The third mating inner circumferential surface 322 is formed in a shape that is line-symmetrical with respect to the reference line RL11.

(Detailed Configuration of Case Section 22)
The detailed configuration of the case section 22 will be described with reference to Figures 24 and 25. Figure 24 is a perspective view of the case section 22 as seen from the upper front, Figure 25(A) is a drawing of the interior of the case section 22 as seen from the rear, and Figure 25(B) is a drawing of the case section 22 as seen from below.

The case split body 22 includes a rear wall portion 50, a circular circumferential wall portion 52, a reel support portion 54, a concave fixing means, and first to fourth mating wall portions 310, 312, 314, 316, and is integrally formed from a synthetic resin material. The first to fourth mating wall portions 310, 312, 314, 316 are formed in an arc shape centered on the center point of the circumferential wall portion 52 on the inner periphery of the circumferential wall portion 52. The first mating wall portion 310 extends continuously in the clockwise direction in FIG. 25A from the vicinity of the right edge of the first locking groove 56A to the vicinity of the right edge of the second locking groove 58A. The second fitting wall portion 312 extends continuously in a counterclockwise direction in Fig. 25A from near the left edge of the first locking groove 56A to near the left edge of the third locking groove 60A. The third fitting wall portion 314 is disposed between the left edge of the second locking groove 58A and the opening 55. The fourth fitting wall portion 316 is disposed between the right edge of the third locking groove 60A and the opening 55. The length by which each of the first to fourth fitting walls 310, 312, 314, and 316 protrudes forward from the front circular end face 52A of the circumferential wall 52 is set to be greater than the length by which each of the fitting protrusions 32B, 32C, 34B, 34C, 36B, 36C, 38, and 40 protrudes rearward from the rear circular end face 26A of the circumferential wall 26, as shown in FIG. 26B. The length by which each of the fitting walls protrudes forward from the front circular end face 52A is set to be slightly smaller than the length by which each of the first to third locking pieces 32A, 34A, and 36A protrudes rearward from the rear circular end face 26A.

In FIG. 25A, the case split body 22 is formed in a shape that is line-symmetrical with respect to a reference line RL12 that passes through the center point of the circumferential wall portion 52 and extends in the vertical direction. The first mating wall portion 310 and the third mating wall portion 314 are disposed in positions that are line-symmetrical with the second mating wall portion 312 and the fourth mating wall portion 316 with respect to the reference line RL12.

[Operation and Function of the Fourth Embodiment]
The procedure for assembling the strap storage device 301 will be described with reference to the drawings. Note that the operation of pulling out and winding the strap 6 in the strap storage device 301 is the same as that in the first embodiment, and therefore the description thereof will be omitted in the fourth embodiment.

(Assembling procedure for strap storage device 301)
The procedure for assembling the strap storage device 301 will be described with reference to Fig. 26. The procedure for assembling the reel assembly 23 and the procedure for attaching the reel assembly 23 to the case section 22 are the same as those in the first embodiment, and therefore will not be described in the fourth embodiment. Figs. 26(A) and (B) show a state in the middle of assembling the two case sections 20, 22, and correspond to Figs. 8(A) and (B).

<Assembly of both case halves 20, 22>
As in the first embodiment, a jig (not shown) is used to assemble both case halves 20 and 22. As in the third embodiment shown in Figures 20A and 20B, an operator positions case halves 20 relative to case halves 22 so that case halves 20 faces case halves 22 to which reel assembly 23 is to be assembled. Specifically, the worker positions the case section 20 relative to the case section 22 so that the locking pieces 32A, 34A, 36A of the case section 20 face the locking grooves 56A, 58A, 60A of the case section 22, respectively, the fitting protrusions 32B, 32C, 34B, 34C, 36B, 36C of the case section 20 face the fitting holes 56B, 56C, 58B, 58C, 60B, 60C of the case section 22, respectively, and the fitting protrusions 38, 40 of the case section 20 face the fitting holes 62, 64 of the case section 22, respectively. When the case sections 20, 22 are positioned opposite each other, the first to third fitting inner circumferential surfaces 318, 320, 322 are positioned slightly forward from the first to fourth fitting walls 310, 312, 314, 316.

Next, the worker pushes the case section 20 into the case section 22 so that the locking pieces and fitting protrusions of the case section 20 are partially engaged with the locking grooves and fitting holes of the case section 22 as shown in Figures 26(A) and (B), i.e., in a provisionally assembled state. For example, in the provisionally assembled state, the bent locking claw 32D of the locking piece 32A of the case section 20 engages with the locking groove 56A of the case section 20 as shown in Figure 26(A), but is not yet engaged with the claw engagement groove portion 56D of the case section 20. In the provisionally assembled state, the fitting protrusions 38, 40 of the case section 20 are partially fitted into the fitting holes 62, 64 of the case section 22 as shown in Figure 26(B). In the provisionally assembled state, all of the locking pieces and all of the fitting protrusions of the case section 20 are partially engaged with all of the locking grooves and all of the fitting holes of the case section 22 as shown in (A) and (B) of FIG. 26, and the engagement state of both case sections 20 and 22 is maintained. When the provisionally assembled state is reached, the first to third fitting inner circumferential surfaces 318, 320, and 322 are partially engaged with the first to fourth fitting wall portions 310, 312, 314, and 316. After the partial engagement of each fitting inner circumferential surface with each fitting wall portion, the fitting protrusions 32B, 32C, 34B, 34C, 36B, 36C, 38, and 40 are partially engaged with the fitting holes 56B, 56C, 58B, 58C, 60B, 60C, 62, and 64, and the provisionally assembled state shown in (A) and (B) of FIG. 26 is reached.

When the worker pushes the case section 20 further into the case section 22 from the provisionally assembled state, the rear circular end surface 26A of the circumferential wall portion 26 of the case section 20 abuts against the front circular end surface 52A of the circumferential wall portion 52 of the case section 22, as in the third embodiment shown in Figures 22 (A) and (B). In this abutting state, all of the bent locking claws of the case section 20 engage with all of the claw engagement grooves of the case section 22, and all of the fitting protrusions of the case section 20 completely fit into all of the fitting holes of the case section 22. For example, the bent locking claw 32D of the locking piece 32A of the case section 20 engages with the claw engagement groove 56D of the case section 22, and the fitting protrusions 38, 40 of the case section 20 completely fit into the fitting holes 62, 64 of the case section 22. When the circular end faces 26A, 52A are in contact with each other, the assembly of the two case halves 20, 22 is complete. When the assembly of the two case halves 20, 22 is complete, the first through fourth mating walls 310, 312, 314, 316 are completely mated up to the front portions of the first through third mating inner circumferential surfaces 318, 320, 322.

By engaging all the bent locking claws of the case section 20 with all the claw engagement grooves of the case section 22, the two case sections 20, 22 can be prevented from moving away from each other in the front-to-rear direction in Figures 26(A) and (B). In addition, by completely fitting all the mating protrusions of the case section 20 into all the mating holes of the case section 22, and completely fitting the first to fourth mating walls 310, 312, 314, 316 up to the front portions of the first to third mating inner circumferential surfaces 318, 320, 322, the two case sections 20, 22 can be reliably prevented from shifting from each other in directions perpendicular to the front-to-rear direction, such as the up-down and left-to-right directions in Figures 26(A) and (B).

[Effects of the Fourth Embodiment]
In this embodiment, the case section 20 includes a number of locking pieces 32A, 34A, 36A and a number of fitting protrusions 32B, 32C, 34B, 34C, 36B, 36C, 38, 40, and the case section 22 includes a number of locking grooves 56A, 58A, 60A and a number of fitting holes 56B, 56C, 58B, 58C, 60B, 60C, 62, 64. Furthermore, the case section 20 includes a number of fitting inner circumferential surfaces 318, 320, 322, and the case section 22 includes a number of fitting walls 310, 312, 314, 316. The two case sections 20, 22 are assembled to one another by engagement between the locking pieces and the locking grooves, by fitting between the fitting protrusions and the fitting holes, and by fitting between the fitting walls and the fitting inner circumferential surfaces. As a result, the manufacturing process of the strap storage device can be simplified compared to the conventional technology in which both case halves are welded together. Also, the engagement of the fitting walls and the fitting inner peripheral surfaces reliably prevents the two case halves 20, 22 from shifting relative to each other in directions perpendicular to the front-rear direction, such as the up-down and left-right directions in Figures 26(A) and 26(B).

In this embodiment, the length by which each of the first to fourth mating wall portions 310, 312, 314, 316 protrudes forward from the front circular end face 52A of the circumferential wall portion 52 is set to be greater than the length by which each of the mating protrusions 32B, 32C, 34B, 34C, 36B, 36C, 38, 40 protrudes rearward from the rear circular end face 26A of the circumferential wall portion 26. As a result, when the temporary assembly is completed, the first to fourth mating walls 310, 312, 314, 316 begin to partially engage with the first to third mating inner circumferential surfaces 318, 320, 322 before the mating protrusions 32B, 32C, 34B, 34C, 36B, 36C, 38, 40 partially engage with the mating holes 56B, 56C, 58B, 58C, 60B, 60C, 62, 64. By first partially engaging each mating wall with each mating inner circumferential surface, the worker can easily position each mating protrusion relative to each mating hole in the left-right and up-down directions.

The fourth embodiment has the same configuration as the first embodiment, and has the same effects as the first embodiment.

Fifth embodiment
A strap storage device 401 according to a fifth embodiment of the present invention will be described below with reference to the drawings. The fifth embodiment differs from the first embodiment in that fitting protrusions 32E, 32F are additionally provided to the case section 20 of the first embodiment, and fitting holes 56E, 56F are additionally provided to the case section 22 of the first embodiment. In the fifth embodiment, parts having the same configuration as those in the first embodiment are indicated by the same numbers, and their description will be omitted. Only the configuration of the fifth embodiment that differs from the first embodiment will be described below.

(Detailed configuration of case section 20)
The detailed configuration of the case section 20 will be described with reference to Figures 27 and 28. Figure 27 is a perspective view of the case section 20 as seen from the upper rear, Figure 28(A) is a drawing of the interior of the case section 20 as seen from the rear, and Figure 28(B) is a drawing of the case section 20 as seen from below.

The case split body 20 includes a front wall portion 24, a circular circumferential wall portion 26, a clip mounting protrusion 28, and a convex fixing means, and is integrally formed from a synthetic resin material. As in the first embodiment, the convex fixing means includes a first convex fixing set 32, a second convex fixing set 34, a third convex fixing set 36, a right fitting protrusion 38, and a left fitting protrusion 40. The fifth embodiment differs from the first embodiment only in the configuration of the first convex fixing set 32, and therefore only the different configuration of the first convex fixing set 32 will be described below.

The first convex fixing set 32 of the case section 20 is located at the uppermost portion of the rear circular end face 26A and includes a first locking piece 32A, a pair of first mating projections 32B, 32C, and a pair of auxiliary mating projections 32E, 32F. The auxiliary mating projection 32E is located further to the right from the first locking piece 32A than the first mating projection 32B. The auxiliary mating projection 32F is located further to the left from the first locking piece 32A than the first mating projection 32C.

In FIG. 28A, the case split body 20 is formed in a shape that is line-symmetrical with respect to a reference line RL11 that passes through the center point of the circumferential wall portion 26 and extends in the vertical direction. Angle β13 between reference line RL11, which is centered on the center point of the circumferential wall portion 26, and auxiliary fitting protrusion 32E is set to the same angle as angle β14 between reference line RL11, which is centered on the center point of the circumferential wall portion 26, and auxiliary fitting protrusion 32F. In this embodiment, each of angles β13 and β14 is set to 35 degrees.

(Detailed Configuration of Case Section 22)
The detailed configuration of the case section 22 will be described with reference to Figures 29 and 30. Figure 29 is a perspective view of the case section 22 as seen from the upper front, and Figure 30 is a diagram of the interior of the case section 22 as seen from the rear.

The case split body 22 includes a rear wall portion 50, a circular circumferential wall portion 52, a reel support portion 54, and a concave fixing means, and is integrally formed from a synthetic resin material. As in the first embodiment, the concave fixing means includes a first concave fixing set 56, a second concave fixing set 58, a third concave fixing set 60, a right fitting hole 62, and a left fitting hole 64. The fifth embodiment differs from the first embodiment only in the configuration of the first concave fixing set 56, and therefore only the different configuration of the first concave fixing set 56 will be described below.

The first concave fixing set 56 of the case section 22 is disposed in the uppermost portion of the front circular end surface 52A of the circumferential wall portion 52, and includes a first locking groove 56A, a pair of first fitting holes 56B, 56C, and a pair of auxiliary fitting holes 56E, 56F. The auxiliary fitting hole 56E is disposed at a position farther to the right from the first locking groove 56A than the first fitting hole 56B. The auxiliary fitting hole 56F is disposed at a position farther to the left from the first locking groove 56A than the first fitting hole 56C.

In FIG. 30, the case split body 22 is formed in a shape that is line-symmetrical with respect to a reference line RL12 that passes through the center point of the circumferential wall portion 52 and extends in the vertical direction. Angle β23 between reference line RL12, which is centered on the center point of the circumferential wall portion 52, and auxiliary fitting hole 56E is set to the same angle as angle β24 between reference line RL12, which is centered on the center point of the circumferential wall portion 52, and auxiliary fitting hole 56F. In this embodiment, each of angles β23 and β24 is set to 35 degrees.

[Operation and Function of Fifth Embodiment]
The procedure for assembling the strap storage device 401 will be described with reference to the drawings. Note that the operation of pulling out and winding the strap 6 in the strap storage device 401 is the same as that in the first embodiment, and therefore the description thereof will be omitted in the fifth embodiment.

(Assembling procedure for strap storage device 401)
The procedure for assembling the strap storage device 401 will be described with reference to Fig. 31. The procedure for assembling the reel assembly 23 and the procedure for attaching the reel assembly 23 to the case section 22 are the same as those in the first embodiment, and therefore will not be described in the fifth embodiment. Figs. 31A and 31B show the state before the two case sections 20, 22 are assembled, and correspond to Figs. 7A and 7B.

<Assembly of both case halves 20, 22>
As in the first embodiment, a jig (not shown) is used to assemble both case halves 20, 22. The worker positions case halves 20 relative to case halves 22 so that case halves 20 faces case halves 22 to which reel assembly 23 is to be assembled, as shown in Figures 31(A) and (B). Specifically, the worker positions case section 20 relative to case section 22 so that locking pieces 32A, 34A, 36A of case section 20 face locking grooves 56A, 58A, 60A of case section 22, respectively, mating protrusions 32B, 32C, 34B, 34C, 36B, 36C and auxiliary mating protrusions 32E, 32F of case section 20 face mating holes 56B, 56C, 58B, 58C, 60B, 60C and auxiliary mating holes 56E, 56F of case section 22, respectively, and mating protrusions 38, 40 of case section 20 face mating holes 62, 64 of case section 22, respectively.

Next, the worker pushes the case section 20 into the case section 22 so that the locking pieces and fitting protrusions of the case section 20 are partially engaged with the locking grooves and fitting holes of the case section 22, i.e., in a provisionally assembled state. For example, in the provisionally assembled state, the bent locking claw 32D of the locking piece 32A of the case section 20 is engaged with the locking groove 56A of the case section 20, but is not yet engaged with the claw engagement groove portion 56D of the case section 20. In the provisionally assembled state, the fitting protrusions 38, 40 of the case section 20 are partially inserted into the fitting holes 62, 64 of the case section 22. In the provisionally assembled state, all of the locking pieces and all of the fitting protrusions of the case section 20 are partially engaged with all of the locking grooves and all of the fitting holes of the case section 22, respectively, and the engagement state of both case sections 20, 22 is maintained.

When the worker pushes the case section 20 further into the case section 22 from the provisionally assembled state, the rear circular end face 26A of the circumferential wall 26 of the case section 20 abuts against the front circular end face 52A of the circumferential wall 52 of the case section 22. In this abutting state, all of the bent locking claws of the case section 20 engage with all of the claw engagement grooves of the case section 22, and all of the fitting protrusions of the case section 20 fit completely into all of the fitting holes of the case section 22. For example, the bent locking claw 32D of the locking piece 32A of the case section 20 engages with the claw engagement groove 56D of the case section 22, and the fitting protrusions 38, 40 of the case section 20 fit completely into the fitting holes 62, 64 of the case section 22. When the two circular end faces 26A and 52A are in contact, the assembly of the two case halves 20 and 22 is complete.

By engaging all of the bent locking claws of the case section 20 with all of the claw engagement grooves of the case section 22, the two case sections 20, 22 can be prevented from moving away from each other in the front-to-back direction in Figures 31(A) and (B). In addition, by completely fitting all of the mating protrusions of the case section 20 into all of the mating holes of the case section 22, the two case sections 20, 22 can be reliably prevented from shifting from each other in directions perpendicular to the front-to-back direction, such as the up-down and left-to-right directions in Figures 31(A) and (B).

[Effects of the Fifth Embodiment]
In this embodiment, the case section 20 includes a number of locking pieces 32A, 34A, 36A, a number of fitting protrusions 32B, 32C, 34B, 34C, 36B, 36C, 38, 40, and a number of auxiliary fitting protrusions 32E, 32F, and the case section 22 includes a number of locking grooves 56A, 58A, 60A, a number of fitting holes 56B, 56C, 58B, 58C, 60B, 60C, 62, 64, and a number of auxiliary fitting holes 56E, 56F. The two case sections 20, 22 are assembled to each other by the engagement of the locking pieces with the locking grooves, the fitting of the fitting protrusions with the fitting holes, and the fitting of the auxiliary fitting protrusions with the auxiliary fitting holes. As a result, the manufacturing process of the strap storage device can be simplified compared to the conventional technology in which the two case sections are welded together. In addition, by engaging each auxiliary mating protrusion and each auxiliary mating hole, the portion adjacent to the first locking piece 32A of the case section 20 and the portion adjacent to the first locking groove 56A of the case section 22 can be reliably prevented from shifting from each other in directions perpendicular to the front-to-rear direction, such as the up-down and left-right directions in Figures 31 (A) and (B).

The inventor conducted an impact test in which the strap 6 was pulled out by a predetermined length while a predetermined load was connected to the knob 2, and the knob 2 was struck against the strap storage device. As a result of conducting impact tests over 7,000 times on the strap storage device 1 of the first embodiment, the two case halves 20 and 22 were separated from each other and a gap was generated at the arrangement portion of the first locking piece 32A and the first locking groove 56A located on the opposite side to the arrangement portion of the openings 30 and 55 where the impact force was applied. A similar impact test was conducted on the strap storage device 401 of the fifth embodiment, but even after 10,000 impact tests, the phenomenon of the two case halves 20 and 22 being separated from each other did not occur at either the arrangement portion of the openings 30 and 55 where the impact force was applied or the arrangement portion of the first locking piece 32A and the first locking groove 56A located on the opposite side. As a result of these impact tests, it was confirmed that the strength of the strap storage device 401 was increased by the engagement of the multiple auxiliary fitting protrusions 32E, 32F with the multiple auxiliary fitting holes 56E, 56F. In particular, in the fifth embodiment, the strength of the strap storage device can be significantly increased by reinforcing the portion opposite to the portion to which the impact force is applied with respect to the center position of both case halves 20, 22. Note that similar impact tests were also performed on a first comparative example in which all of the locking pieces 32A, 34A, and 36A were removed from the first embodiment, and a second comparative example in which all of the fitting protrusions 32B, 32C, 34B, 34C, 36B, 36C, 38, and 40 were removed from the first embodiment. In the first comparative example, gaps were generated between both case halves 20 and 22 after less than 2,000 impact tests, and in the second comparative example, gaps were generated between both case halves 20 and 22 after less than 30 impact tests.

The fifth embodiment has the same configuration as the first embodiment, and has the same effects as the first embodiment.

<Corresponding structure>
The strap storage device 1, 101, 201, 301, 401, and the strap 6 are examples of the strap storage device and the strap of the present invention. The knob portion 2 is an example of the connecting member of the present invention. The case segments 20, 120, 22, 122 are examples of the first case segment and the second case segment of the present invention. The reel body 70 is an example of the rotating body of the present invention. The spring 72 is an example of the elastic body of the present invention. The rear circular end faces 26A, 126A of the circumferential wall portions 26, 126 of the case segments 20, 120 are an example of the first circumferential end portion of the first case segment of the present invention, and the front circular end faces 52A, 152A of the circumferential wall portions 52, 152 of the case segments 22, 122 are an example of the second circumferential end portion of the second case segment of the present invention. The first to third locking pieces 32A to 36A and the first to fourth locking pieces 132A to 136A are examples of locking pieces of the present invention, the bent locking claws 32D to 36D of the first to third locking pieces 32A to 36A and the bent locking claws 132D to 136D of the first to fourth locking pieces 132A to 136A are examples of locking end portions of the locking pieces of the present invention. The first to third locking grooves 56A to 60A and the first to fourth locking grooves 156A to 160A are examples of locking grooves of the present invention. The first to third fitting protrusions 32B, 32C, 34B, 34C, 36B, 36C, the first to fourth fitting protrusions 132B to 136B, the right fitting protrusions 38, 138, the left fitting protrusions 40, 140, and the auxiliary fitting protrusions 32E, 32F are examples of fitting protrusions of the present invention. The first to third fitting holes 56B, 56C, 58B, 58C, 60B, 60C, the first to fourth fitting holes 156B to 160B, the right fitting holes 62, 162, the left fitting holes 64, 164, and the auxiliary fitting holes 56E, 56F are examples of fitting holes of the present invention. The openings 30, 55, 130, 155 are examples of drawer openings of the present invention. The angles β11 and β12 and the angles β33 and β34 are examples of "two angle ranges on both sides in the circumferential direction of the drawer opening" of the present invention.

<Modification>
The present invention is not limited to the present embodiment, and various modifications are possible without departing from the spirit of the present invention. An example of such a modification will be described below.

(1) In this embodiment, the case sections 20, 120 have a number of locking pieces 32A, 34A, 36A and a number of mating protrusions 32B, 32C, 34B, 34C, 36B, 36C, 38, 40, and the case sections 22, 122 have a number of locking grooves 56A, 58A, 60A and a number of mating holes 56B, 56C, 58B, 58C, 60B, 60C, 62, 64, but are not limited to this configuration. For example, instead of the configuration of this embodiment, the case sections 20, 120 may have a number of locking pieces and a number of mating holes, and the case sections 22, 122 may have a number of locking grooves and a number of mating protrusions.

(2) In this embodiment, the case halves 20 and 120 have locking pieces arranged on the reference lines RL11 and RL21 or in the vicinity of the reference lines on both sides of the reference lines, and the case halves 22 and 122 have locking grooves arranged on the reference lines RL12 and RL22 or in the vicinity of the reference lines on both sides of the reference lines, but this is not limited to the configuration. For example, in addition to the configuration of this embodiment, or instead of some of the configurations, the case halves 20 and 120 may have locking pieces arranged on an orthogonal line perpendicular to the reference lines RL11 and RL21 or in the vicinity of the orthogonal line on both sides of the orthogonal line, and the case halves 22 and 122 may have locking grooves arranged on an orthogonal line perpendicular to the reference lines RL12 and RL22 or in the vicinity of the orthogonal line on both sides of the orthogonal line.

(3) In this embodiment, the strap storage device 1, 101, 201, 301, 401 does not have a configuration for maintaining the pulled-out state of the strap 6 when the strap 6 is pulled out, but is not limited to this configuration. For example, the strap storage device 1, 101, 201, 301, 401 may have a configuration including an engagement body fixed to the reel assembly 23 and having multiple locking portions, multiple locking portions fixed to the case sections 20, 120, and an elastic body that biases the engagement body toward the case sections 20, 120, as disclosed in JP 2017-128406 A.

(4) In the second and fifth embodiments, the case sections 20, 120 and the case sections 22, 122 are configured to include locking pieces and mating protrusions, as well as locking grooves and mating holes. In addition to this configuration, they may also be configured to include mating walls and mating inner surfaces, as in the third and fourth embodiments.

(5) In this embodiment, the second convex fixing set 34 and the third convex fixing set 36 are arranged in the angle range of angles β11 and β12 on both sides of the opening 30 of the case section 20, and the second concave fixing set 58 and the third concave fixing set 60 are arranged in the angle range of angles β21 and β22 on both sides of the opening 55 of the case section 22. The third convex fixing set 134 and the fourth convex fixing set 136 are arranged in the angle range of angles β33 and β34 on both sides of the opening 130 of the case section 120, and the third concave fixing set 158 and the fourth concave fixing set 160 are arranged in the angle range of angles β43 and β44 on both sides of the opening 155 of the case section 122. These angles β11 to β44 are set to acute angles of 45 degrees or less, such as 45 degrees or 40 degrees, but are not limited to these set angles. For example, if it is possible to prevent misalignment between the portions of the case segments 20, 120 near the openings 30, 130 and the portions of the case segments 22, 122 near the openings 55, 155 in the front-to-rear direction, the direction perpendicular to the front-to-rear direction, and the circumferential direction, these angles β11 to β44 may be set to angles of 90 degrees or less.

(6) In this embodiment, the rear circular end faces 26A, 126A of the circumferential wall portions 26, 126 of the case segments 20, 120 directly abut against the front circular end faces 52A, 1526A of the circumferential wall portions 52, 152 of the case segments 22, 122, thereby joining the two case segments together; however, this is not limiting. For example, as disclosed in Japanese Patent Publication No. 5230679, the two case segments may abut indirectly with a partition plate interposed therebetween. In this modified example, a configuration in which a locking piece or locking groove and a mating protrusion or mating hole are formed on the partition plate is conceivable. The partition plate in the modified example is an example of an attachment member of the present invention.

1, 101, 201, 301, 401 Strap storage device 2 Handle 6 Strap 20, 22, 120, 122 Case section 23 Reel assembly 30 Opening 55 of case section 20, 120 Opening 32A, 34A, 36A, 132A, 133A, 134A, 136A of case section 22, 122 Locking piece 56A, 58A, 60A, 156A, 157A, 158A, 160A Locking groove 32B, 32C to 36B, 36C, 38, 40, 132B, 132C to 136B, 136C, 138, 140 Fitting protrusions 56B, 56C to 60B, 60C, 62, 64, 156B, 156C to 160B, 160C, 162, 164 Fitting holes 32E, 32F Auxiliary fitting protrusions 56E, 56F Auxiliary fitting holes 32D to 36D, 132D to 136D Bent locking claws 70 of locking pieces 32A to 36A, 132A to 136A Reel body 72 Rigid spring

Claims (12)

A rotating body around which a long strap is wound;
a first case section and a second case section that define an accommodation space for accommodating a rotor rotatably about a predetermined rotation axis;
an elastic body accommodated in the accommodation space and biasing the rotating body so that the rotating body rotates in a predetermined winding direction;
a fastening means for fastening the first case section and the second case section together;
a pull-out opening formed in at least one of the first case section and the second case section, through which the strap is pulled out;
the first case section includes a first circumferential end section defining a first opening that opens in an axial direction along which the predetermined rotation axis extends;
the second case section includes a second circumferential end section that defines a second opening that opens in the axial direction, the second circumferential end section being formed in a shape that allows it to be joined to the first circumferential end section via an attachment member attached to the second circumferential end section, or directly without an attachment member;
The fixing means is
A locking and fixing means including an elastically deformable locking piece having a bent locking end portion and extending in an axial direction, and a locking groove with which the locking end portion is engaged;
a fitting and fixing means including a fitting protrusion extending in an axial direction and a fitting hole formed to extend in the axial direction and into which the fitting protrusion is inserted and fitted;
At least one set of one locking fixing means and at least one fitting fixing means is disposed between the first circumferential end and the second circumferential end, or between the first circumferential end and an attachment member attached to the second circumferential end ,
At least one set is disposed within an angular range on at least one of both sides of the drawer opening in a peripheral direction in which the first peripheral portion and the second peripheral portion extend;
A strap storage device in which the angular range of at least one of both sides of a drawer opening is within an angular range of 90 degrees from the drawer opening about a predetermined rotation axis . A rotating body around which a long strap is wound;
a first case section and a second case section that define an accommodation space for accommodating a rotor rotatably about a predetermined rotation axis;
an elastic body accommodated in the accommodation space and biasing the rotating body so that the rotating body rotates in a predetermined winding direction;
a fastening means for fastening the first case section and the second case section together;
a pull-out opening formed in at least one of the first case section and the second case section, through which the strap is pulled out;
the first case section includes a first circumferential end section defining a first opening that opens in an axial direction along which the predetermined rotation axis extends;
the second case section includes a second circumferential end section that defines a second opening that opens in the axial direction, the second circumferential end section being formed in a shape that allows it to be joined to the first circumferential end section via an attachment member attached to the second circumferential end section, or directly without an attachment member;
The fixing means is
A locking and fixing means including an elastically deformable locking piece having a bent locking end portion and extending in an axial direction, and a locking groove with which the locking end portion is engaged;
a fitting and fixing means including a fitting protrusion extending in an axial direction and a fitting hole formed to extend in the axial direction and into which the fitting protrusion is inserted and fitted;
a plurality of sets of one locking fixing means and at least one fitting fixing means are disposed between the first circumferential end and the second circumferential end, or between the first circumferential end and an attachment member attached to the second circumferential end,
the locking pieces and at least one fitting protrusion of one of two sets adjacent to each other in a circumferential direction in which the first peripheral portion and the second peripheral portion extend among the plurality of sets are disposed within two angular ranges on both sides in the circumferential direction of the drawer opening, and the locking pieces and at least one fitting protrusion of the other set are disposed within two angular ranges on both sides in the circumferential direction of the drawer opening,
A strap storage device, wherein each of the two angular ranges is an angular range within 90 degrees from the withdrawal opening about a predetermined rotation axis. A rotating body around which a long strap is wound;
a first case section and a second case section that define an accommodation space for accommodating a rotor rotatably about a predetermined rotation axis;
an elastic body accommodated in the accommodation space, the elastic body biasing the rotating body so that the rotating body rotates in a predetermined winding direction;
a fastening means for fastening the first case piece and the second case piece together,
the first case section includes a first circumferential end section defining a first opening that opens in an axial direction along which the predetermined rotation axis extends;
the second case section includes a second circumferential end section that defines a second opening that opens in the axial direction, the second circumferential end section being formed in a shape that allows it to be joined to the first circumferential end section via an attachment member attached to the second circumferential end section, or directly without an attachment member;
The fixing means is
A locking and fixing means including an elastically deformable locking piece having a bent locking end portion and extending in an axial direction, and a locking groove with which the locking end portion is engaged;
a fitting and fixing means including a fitting protrusion extending in an axial direction and a fitting hole formed to extend in the axial direction and into which the fitting protrusion is inserted and fitted;
The first peripheral portion and the second peripheral portion are each formed in a circular shape centered on a predetermined rotation axis,
a plurality of sets of one locking fixing means and at least one fitting fixing means are disposed between the first circumferential end and the second circumferential end, or between the first circumferential end and an attachment member attached to the second circumferential end,
a drawer opening formed in at least one of the first case section and the second case section, through which the strap is drawn out;
a connecting member connected to the strap, the connecting member abutting against a portion of the case split body where the drawer opening is formed and stopping the winding of the strap when the strap is wound around the rotating body by the elastic force of the elastic body,
Among the plurality of sets, the locking pieces and at least one fitting protrusion of one set of two sets adjacent to each other in the circumferential direction in which the first peripheral edge portion and the second peripheral edge portion extend , and the locking pieces and at least one fitting protrusion of the other set are respectively disposed within two angular ranges on both sides in the circumferential direction of the drawer opening,
A strap storage device, wherein each of the two angular ranges is an angular range within 90 degrees from the withdrawal opening about a predetermined rotation axis. One locking fixing means and two fitting fixing means form a set disposed within each of the two angle ranges ;
4. The strap storage device according to claim 3, wherein the two fitting projections of the two fitting-fixing means are disposed on both sides in the circumferential direction of the locking piece of the locking-fixing means which is in the same set as the two fitting-fixing means. A rotating body around which a long strap is wound;
a first case section and a second case section that define an accommodation space for accommodating a rotor rotatably about a predetermined rotation axis;
an elastic body accommodated in the accommodation space and biasing the rotating body so that the rotating body rotates in a predetermined winding direction;
a fastening means for fastening the first case piece and the second case piece together,
the first case section includes a first circumferential end section defining a first opening that opens in an axial direction along which the predetermined rotation axis extends;
the second case section includes a second circumferential end section that defines a second opening that opens in the axial direction, the second circumferential end section being formed in a shape that allows it to be joined to the first circumferential end section via an attachment member attached to the second circumferential end section, or directly without an attachment member;
The fixing means is
A locking and fixing means including an elastically deformable locking piece having a bent locking end portion and extending in an axial direction, and a locking groove with which the locking end portion is engaged;
a fitting and fixing means including a fitting protrusion extending in an axial direction and a fitting hole formed to extend in the axial direction and into which the fitting protrusion is inserted and fitted;
The first peripheral portion and the second peripheral portion are each formed in a circular shape centered on a predetermined rotation axis,
a plurality of sets of one locking fixing means and at least one fitting fixing means are disposed between the first circumferential end and the second circumferential end, or between the first circumferential end and an attachment member attached to the second circumferential end,
One locking fixing means and one fitting fixing means constitute one set,
A strap storage device in which, among the multiple sets, the mating protrusions of one of two sets that are adjacent in the circumferential direction in which the first peripheral portion and the second peripheral portion extend are arranged only on the side of the locking piece of one set that is farther from the locking piece of the other set, among both sides in the circumferential direction of the locking piece of the one set. One locking fixing means and at least one fitting fixing means constitute one set,
4. The strap storage device according to claim 3, wherein in each pair of fitting and fixing means and locking and fixing means, the fitting protrusion of the fitting and fixing means is disposed on one of both circumferential sides of the locking piece of the locking and fixing means that is closer to the withdrawal opening. One locking fixing means and one fitting fixing means constitute one set,
4. The strap storage device according to claim 3, wherein in one set of fitting and fixing means and locking and fixing means, the fitting protrusion of the fitting and fixing means is arranged only on one of both circumferential sides of the locking piece of the locking and fixing means that is farther from the withdrawal opening. a plurality of sets of one locking fixing means and at least one fitting fixing means are disposed between the first circumferential end and the second circumferential end, or between the first circumferential end and an attachment member attached to the second circumferential end,
A strap storage device as described in any one of claims 3, 6 and 7, wherein, among the multiple sets, the locking pieces and at least one mating protrusion of one of two sets adjacent to each other in the circumferential direction are arranged in an axis-symmetric relationship with respect to a line connecting a predetermined axis of rotation and the position of the withdrawal opening as the axis of symmetry. The strap storage device according to any one of claims 3, 6, 7, and 8, wherein the two fitting and fixing means are arranged between the first peripheral end and the second peripheral end, or between the first peripheral end and the attachment member attached to the second peripheral end, so that they are each located on a line that is perpendicular to a line connecting the predetermined rotation axis and the position of the withdrawal opening and that passes through the predetermined rotation axis. A rotating body around which a long strap is wound;
a first case section and a second case section that define an accommodation space for accommodating a rotor so as to be rotatable about a predetermined rotation axis;
an elastic body accommodated in the accommodation space and biasing the rotating body so that the rotating body rotates in a predetermined winding direction;
a fastening means for fastening the first case section and the second case section together;
a drawer opening formed in at least one of the first case section and the second case section, through which the strap is drawn out;
a connecting member connected to the strap, the connecting member abutting against a portion of the case split body that forms the drawer opening when the strap is wound around the rotating body by the elastic force of the elastic body, and stopping the winding of the strap;
the first case section includes a first circumferential end section defining a first opening that opens in an axial direction along which the predetermined rotation axis extends;
the second case section includes a second circumferential end section that defines a second opening that opens in the axial direction, the second circumferential end section being formed in a shape that allows it to be joined to the first circumferential end section via an attachment member attached to the second circumferential end section, or directly without an attachment member;
The first peripheral portion and the second peripheral portion are each formed in a circular shape centered on a predetermined rotation axis,
The fixing means is
A locking and fixing means including an elastically deformable locking piece having a bent locking end portion and extending in an axial direction, and a locking groove with which the locking end portion is engaged;
a fitting and fixing means including a fitting protrusion extending in an axial direction and a fitting hole formed to extend in the axial direction and into which the fitting protrusion fits;
a plurality of sets of one locking fixing means and at least one fitting fixing means are disposed between the first circumferential end and the second circumferential end, or between the first circumferential end and an attachment member attached to the second circumferential end,
Among the plurality of sets, in a first set and a second set adjacent to each other in a circumferential direction in which the first peripheral edge portion and the second peripheral edge portion extend, the locking pieces and at least one fitting protrusion of the first set and the locking pieces and at least one fitting protrusion of the second set are respectively disposed within two angular ranges on both sides in the circumferential direction of the drawer opening,
A strap storage device, wherein each of the two angular ranges is an angular range within 45 degrees from the withdrawal opening about a predetermined axis of rotation. the plurality of sets includes a third set in addition to the first and second sets;
The strap storage device according to claim 10, wherein the one locking fixing means and the at least one fitting fixing means of the third set are arranged at positions point-symmetrical to the position of the withdrawal opening with the predetermined rotation axis as the center of symmetry. the plurality of sets includes a third and a fourth set in addition to the first and second sets;
the one locking and fixing means of the third set and the at least one fitting and fixing means are arranged at positions that are symmetrical to the positions of the one locking and fixing means of the first set and the at least one fitting and fixing means, with a line that is perpendicular to a line connecting the predetermined rotation axis and the position of the draw-out opening and that passes through the predetermined rotation axis as an axis of symmetry;
The strap storage device of claim 10, wherein the one engaging and fixing means of the fourth set and the at least one fitting and fixing means are arranged at a position that is symmetrical to the position of the one engaging and fixing means of the second set, with a line passing through the specified rotation axis as an axis of symmetry, the line being perpendicular to a line connecting the specified rotation axis and the position of the withdrawal opening.

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