Braided tape take-up device

Abstract

The utility model discloses a braid rolling device capable of improving the assembly of a pair of leg plates when the base end part of the protection component is rotatably installed on the frame. Holes (36, 37) are formed through the upper part of a pair of leg plates (32L, 32R) of the frame (32), and shaft parts (42, 43) of a protection component (40) are inserted into the holes. The protection component has a pair of shaft parts, a pair of side edge parts (44, 45), a terminal end side connecting part (46), and a base end side connecting part (48), and the shaft parts are formed on the base end part side of the side edge parts. The terminal end side connecting part connects the terminal end parts of the pair of side edge parts, and a through part (46H) for the braid (22) extending from a belt pulley (34) is formed through the terminal end side connecting part. The base end side connecting part connects the parts of the pair of side edge parts on the side of the base end parts, is formed in a thin plate shape with the direction orthogonal to the front surface (48A) facing the braid as the plate thickness direction, and has flexibility.

Description

Technical Field

[0001] This utility model relates to a webbing winding device for winding up webbing worn by vehicle occupants. Background Technology

[0002] Patent Document 1 disclosed the technology related to a webbing winding device having a protective member as a protective component. In this prior art, the protective member has: a rotating part which is disposed on both sides of the frame in the width direction between a pair of leg plates around the entire circumference of the winding shaft and is rotatable along the circumference of the winding shaft; and a passing part which is integrally disposed with the rotating part and through which the webbing extending from the winding shaft passes.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2012-76704

[0004] However, although a configuration is sometimes used in which the base end of the protective member is rotatably mounted on the upper part of a pair of leg plates of the frame and the protective member extends out of the frame, there is room for improvement in terms of assemblability in such a configuration. Utility Model Content

[0005] In view of the above-mentioned situation, the present invention aims to provide a webbing winding device that improves the assemblability when the base end of the protective member is rotatably mounted to a pair of leg plates of the frame.

[0006] The first embodiment of the webbing winding device of this utility model comprises: a winding shaft for winding a webbing worn by an occupant; a frame having a pair of leg plates arranged on both sides of the winding shaft with the axial direction of the winding shaft as the opposing direction, supporting both ends of the winding shaft, and having holes formed through the opposing portions of the pair of leg plates in the upper part of the pair of leg plates; and a protective member having a pair of shaft portions that are respectively inserted into the holes of the pair of leg plates, a pair of elongated side portions with the shaft portions formed on the base end side, an end-side connecting portion that connects the end portions of the pair of side portions and has a through portion through which the webbing extending from the winding shaft passes, and a flexible base-end connecting portion that connects the base end portions of the pair of side portions and is formed in a thin plate shape with the thickness direction orthogonal to the surface facing the webbing, i.e., the front surface, as the plate thickness direction.

[0007] Regarding the second aspect of the webbing winding device of the present invention, based on the first aspect of the webbing winding device of the present invention, an extension portion is formed at the base end of the pair of side portions, extending from the portion connected to the base end side connection portion toward the front surface of the base end side connection portion. The pair of shaft portions are formed on the outer surface side opposite to the inner surface side of the pair of extension portions. When viewed from the axial direction of the pair of shaft portions, the base end side connection portion is offset relative to the pair of shaft portions in the plate thickness direction of the base end side connection portion.

[0008] In the third embodiment of the webbing winding device of the present invention, based on the first or second embodiment of the webbing winding device of the present invention, the base end side connecting portion is configured such that the middle portion in the direction of connecting the base end side portions of the pair of side portions is thinner than the other portion.

[0009] Regarding the fourth aspect of the webbing winding device of this utility model, based on the webbing winding device of any one of the first to third aspects of this utility model, two elongated longitudinal connecting portions are formed between the pair of side portions, which are located on both sides near the center position relative to the interval direction of the pair of side portions, respectively connecting the end-side connecting portion and the base-side connecting portion. The distance between the two longitudinal connecting portions is set to be smaller than the width of the webbing.

[0010] Regarding the fifth aspect of the webbing winding device of the present invention, based on the webbing winding device of any one of the first to fourth aspects of the present invention, the end face of the end-side connecting portion, which is arranged closer to the winding shaft than the through portion, has an inclined portion that is inclined toward the through portion toward the side adjacent to the webbing.

[0011] In the first embodiment of the webbing winding device of this utility model, a winding shaft winds up a webbing worn by an occupant. A pair of leg plates are arranged on both sides of the winding shaft with the axial direction of the winding shaft as the opposing direction, and a frame having the pair of leg plates supports both ends of the winding shaft. Holes are formed in the upper part of the pair of leg plates and in their opposing portions. Furthermore, the protective member has a pair of shaft portions, a pair of side portions, an end-side connecting portion, and a base-end-side connecting portion, with the shaft portions inserted into the holes of the pair of leg plates. The side portions are formed in a strip shape, and a shaft portion is formed at the base end side. The end-side connecting portion connects the end portions of the pair of side portions, and a through portion is formed in the end-side connecting portion for the webbing extending from the winding shaft to pass through. Furthermore, the base-end-side connecting portion connects the base-end-side portions of the pair of side portions, and is formed in a thin plate shape with the thickness direction orthogonal to the surface facing the webbing, i.e., the front surface, as the plate thickness direction, and is flexible. Therefore, when assembling the protective member to a pair of leg plates, the base end connecting portion can be bent, and the shaft portion can be inserted into the hole by elastically restoring the base end connecting portion. Furthermore, the base end connecting portion has elasticity, thereby preventing the shaft portion from detaching from the hole. Therefore, it is unnecessary to provide, for example, an anti-detachment bending portion at the end of the shaft portion, thus avoiding the deterioration of assembly performance caused by such an anti-detachment bending portion. Based on the above, the assembly performance when the base end of the protective member is rotatably mounted to a pair of leg plates of the frame can be improved.

[0012] In the second embodiment of the webbing winding device of this utility model, an extension portion is formed at the base end of a pair of side portions, extending from the portion connected to the base end side connecting portion toward the front surface of the base end side connecting portion. A pair of shaft portions are formed on the outer surface side opposite to the inner surface side of the pair of extension portions. When viewed from the axial direction of the pair of shaft portions, the base end side connecting portion is offset relative to the pair of shaft portions in the plate thickness direction of the base end side connecting portion. Therefore, even if the amount of webbing wound on the winding shaft increases, contact between the webbing and the base end side connecting portion can be avoided. Furthermore, in order to assemble the protective member onto the pair of leg plates, the amount of bending when the base end side connecting portion bends can be minimized.

[0013] In the third embodiment of the webbing winding device of this utility model, the base end side connecting portion is set to be thinner than other portions in the middle portion in the direction of connecting the base end side portions of a pair of side portions. Therefore, the base end side connecting portion can be easily bent when assembling the protective member to a pair of leg plates.

[0014] In the fourth embodiment of the webbing winding device of this utility model, between a pair of side portions, there are two long longitudinal connecting portions that connect the end-side connecting portion and the base-side connecting portion respectively at both sides relative to the central position in the interval direction of the pair of side portions. The distance between the two longitudinal connecting portions is set to be smaller than the width of the webbing. Therefore, when the webbing passes through the through portion, the webbing can be placed on the two longitudinal connecting portions while passing through the through portion.

[0015] In the fifth embodiment of the webbing winding device of this utility model, the end face of the end-side connecting portion, which is arranged closer to the winding shaft than the through portion, has an inclined portion that is inclined toward the through portion toward the side adjacent to the webbing. Therefore, when the webbing passes through the through portion, the end of the webbing is less likely to hook onto the end face of the end-side connecting portion, which is arranged closer to the winding shaft than the through portion, and the webbing is easier to pass through the through portion. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the upper part of a seat back that houses the webbing winding device according to one embodiment of the present invention.

[0017] Figure 2 yes Figure 1 Left side view of the webbing winding device.

[0018] Figure 3 Viewed from the left diagonal front Figure 1 A three-dimensional view of the webbing winding device.

[0019] Figure 4 Viewed from the front and diagonally downward to the right. Figure 3 The 3D view of the protective components.

[0020] Figure 5 Viewed from the front and slightly to the upper left. Figure 3 The 3D view of the protective components.

[0021] Figure 6 Viewed from the rear and diagonally to the left. Figure 3 The 3D view of the protective components.

[0022] Figure 7 Viewed from the right diagonal rear side Figure 3 The three-dimensional view of the protective component.

[0023] Figure 8A It is a perspective view showing the state in which a shaft of the protective component is inserted into a hole in the leg plate in order to assemble the protective component into the frame.

[0024] Figure 8B It means from Figure 8AThe image shows a three-dimensional view of the protective component in a bent state, created by using fingers to connect the base end of the component.

[0025] Figure 8C It means from Figure 8B The perspective view shows the state in which the other shaft of the protective component moves directly below the hole in the leg plate.

[0026] Figure 8D It means from Figure 8C The perspective view shows the state in which the protective component is elastically reset, thereby inserting the other shaft of the protective component into the hole of the leg plate.

[0027] Figure 9A This is a diagram schematically illustrating the amount of bending at the base-side connection during the assembly of a protective component in another example.

[0028] Figure 9B This is a diagram schematically illustrating the amount of bending at the base-side connection during assembly of the protective component according to the embodiment.

[0029] Figure 10 This is a side view of a webbing winding device showing the state of the webbing passing through the through section of the protective member.

[0030] Figure 11 This is a perspective view of a webbing winding device in the posture of passing the webbing through the through portion of the protective member.

[0031] Figure 12 This is a rear view showing the deformation of the protective component when a tensile force in an oblique direction is applied to the webbing.

[0032] Explanation of reference numerals in the attached figures

[0033] 22...Webbing; 30...Webbing winding device; 32...Frame; 32L, 32R...Leg plates; 34...Pulley (winding shaft); 36, 37...Hole; 40...Protective component; 42, 43...Shaft; 44, 45...Side; 44F, 45F...Front extension; 44F1, 45F1...Inner surface; 44F2, 45F2...Outer surface; 46...End-side connection; 46H...Through; 46E...End face; 46S...Inclined part; 48...Base-end-side connection; 48A...Front surface; 48M...Middle part in the connection direction (middle part in the direction that connects the base-end-side portions of a pair of side parts); 50...Longitudinal connection; CL...Central position in the spacing direction; K...Spacing direction; W...Connection direction (direction that connects the base-end-side portions of a pair of side parts). Detailed Implementation

[0034] use Figures 1-12 The present invention will describe a webbing winding device according to one embodiment of the present invention. Figure 1 This is a longitudinal sectional view of the upper part of the seat back 12, which houses the webbing winding device 30 according to the embodiment, viewed from the side. It shows the portion (including the shoulder area) on the left-right side.

[0035] The seat back 12 is part of the vehicle seat 10, providing support for the back of the seated occupant. Additionally, Figure 1 In the diagram, arrow FR indicates the front of the vehicle seat 10, and arrow UP indicates the top of the vehicle seat 10. The vehicle seat 10 is configured to include a seat cushion (not shown) that supports the buttocks and thighs of the seated occupant. The seat back 12 has: a seat back frame 14 as its skeletal member, a seat cushion 16 covering the seat back frame 14, and a seat back cover 18 covering the seat cushion 16.

[0036] A webbing winding device 30, housed inside the seat back 12, is partially installed on the seat back frame 14. Additionally, Figure 1 For simplicity, the webbing winding device 30 is shown in a simplified form. The seat belt device 20 equipped with the webbing winding device 30 is a three-point seat belt device. For the long strip-shaped webbing 22 worn by the occupant in the seat belt device 20, one end in the long direction is secured to a pulley 34, which serves as the winding shaft of the webbing winding device 30, and the other end in the long direction is secured to an anchoring member provided on the side of the seat cushion (not shown) in the left-right direction. Furthermore, a tongue (not shown) is installed in the middle of the long side of the webbing 22, and the tongue can be connected to a buckle (not shown) provided on the side of the seat cushion (not shown) in the other left-right direction. The webbing winding device 30 will be described below.

[0037] A frame 24 is provided at the shoulder end in one direction of the left-right direction of the seat back 12. The frame 24 is used to guide the webbing 22 and has a slit-shaped hole 24H through which the webbing 22 passes. The frame 24 is fixed to a part of the seat back frame 14 (not shown) by means of a component and by screws or the like.

[0038] Figure 2 The left side view of the webbing winding device 30 is shown. Figure 3A perspective view of the webbing winding device 30 as seen from the left oblique front is shown. Furthermore, the basic structure of the webbing winding device 30 (excluding the protective member 40 and related parts described below as protective components) can utilize known basic structures (e.g., the basic structure of a webbing winding device disclosed in Japanese Patent Application Publication No. 2014-162290, etc.), therefore, a detailed description of the basic structure of the webbing winding device 30 is appropriately omitted.

[0039] like Figure 2 and Figure 3 As shown, the webbing take-up device 30 includes a frame 32, which is made of metal (for example, steel). The frame 32 is fixed to the seat back frame 14 (see reference). Figure 1 The flat back plate 32B at the location is formed with... Figure 3 The back plate 32B shown has a pair of leg plates 32L and 32R extending from both ends of the back plate 32B in the width direction at approximately right angles in the same direction. The pair of leg plates 32L and 32R form part of the frame 32 and are arranged on both sides of the pulley 34 with the axial direction of the pulley 34 as the opposite direction. The frame 32 supports the two ends of the pulley 34.

[0040] The pulley 34 is disposed between a pair of leg plates 32L and 32R, and is formed into a generally cylindrical shape arranged axially along the opposing directions of the pair of leg plates 32L and 32R. The pulley 34 has a belt shaft 34A that forms the core portion. In addition, flange portions 34F (one flange portion is not shown) are formed at both ends of the pulley 34 as extension portions extending radially outward.

[0041] If the pulley 34 is rotated in one direction around its central axis, i.e., the winding direction, the webbing 22 is wound up in layers around the outer periphery of the pulley 34 from its base end along its long side and stored therein. Furthermore, if the webbing 22 is pulled towards its end, the webbing 22 wound on the pulley 34 is pulled out, and the pulley 34 rotates in the opposite direction to the winding direction.

[0042] On the other hand, the frame 32 has bearing holes 36 and 37 formed in the upper part of the pair of leg plates 32L and 32R, respectively, and in their opposing portions. The holes 36 and 37 are used for assembling the protective member 40. The protective member 40 is made of resin and has a pair of shafts 42 and 43 that are inserted into the holes 36 and 37 of the pair of leg plates 32L and 32R, respectively. The protective member 40 extends generally from the frame 32 in an upward and forward inclined manner and is configured to be rotatable about the axis of the pair of shafts 42 and 43.

[0043] Figure 4 This shows a perspective view of the protective element 40 as seen from the front and lower right. Figure 5A perspective view of the protective member 40 as seen from the front and slightly above the left is shown. Furthermore, Figure 6 This shows a perspective view of the protective element 40 as seen from the rear and lower left. Figure 7 A perspective view of the protective element 40 as seen from the right rear side is shown.

[0044] like Figure 4 and Figure 5 As shown, the protective member 40 has a pair of elongated side portions 44 and 45, with shaft portions 42 and 43 formed at the base ends 44A and 45A of the side portions 44 and 45. The pair of side portions 44 and 45 are formed parallel to each other. Front extension portions 44F and 45F, which extend forward, are formed at the base ends 44A and 45A of the pair of side portions 44 and 45. The pair of shaft portions 42 and 43 are formed on the outer surfaces 44F2 and 45F2 of the pair of front extension portions 44F and 45F, opposite to the inner surfaces 44F1 and 45F1 that are facing each other. Furthermore, rear extension portions 44R and 45R, which extend rearward, are formed at the base ends 44A and 45A of the pair of side portions 44 and 45. On the rear extensions 44R and 45R, there are stop protrusions S1 and S2 that protrude outward in the width direction (left-right direction) of the protective member 40. When the protective member 40 rotates rearward to a predetermined angle, the protrusions S1 and S2 and... Figure 3 The upper surfaces of the leg plates 32L and 32R of the frame 32 shown abut against each other.

[0045] like Figure 4 and Figure 5 As shown, the portions of the pair of side portions 44 and 45, excluding their ends along their long sides, are rod-shaped portions 44B and 45B. As an example, the cross-sectional shape of the rod-shaped portions 44B and 45B, orthogonal to their long sides, is approximately rectangular, and their length in the width direction (left-right direction) is less than their length in the thickness direction, orthogonal to that width direction. Furthermore, protruding portions 44P and 45P are formed at the end portions 44C and 45C of the pair of side portions 44 and 45. As an example, the protruding portions 44P and 45P are configured to include portions whose protrusion gradually increases from the side connected to the rod-shaped portions 44B and 45B.

[0046] The end portions 44C and 45C of a pair of side portions 44 and 45 are connected by an end-side connecting portion 46. The end-side connecting portion 46 is configured such that its long side direction is perpendicular to the pair of side portions 44 and 45 when viewed from the front (in other words, the width direction (left-right direction) of the protective member 40). A through-type connection for... Figure 3 The webbing 22 extending from the pulley 34 shown passes through the through portion 46H. In other words, the end-side connecting portion 46 can be understood as an element constituting the belt guide portion. Figure 4 As shown, the through portion 46H extends along the long side of the end-side connecting portion 46. To explain in more detail, in this embodiment, as an example, the end-side connecting portion 46 has a base portion 46A that connects the base portions of the end portions 44C and 45C of the side portions 44 and 45 to each other, and an end structure portion 46B that connects the protruding end portions of the protruding pieces 44P and 45P to each other, with the base portion 46A and the end structure portion 46B forming the through portion 46H.

[0047] Furthermore, the protective member 40 is closer to the pulley 34 in the end-side connecting portion 46 than the through portion 46H (see reference). Figure 3 ) side (in other words, Figure 4 The end face 46E (lower part of the middle figure) has an inclined portion 46S that slopes toward the through portion 46H toward the side adjacent to the webbing 22 (front side). In this embodiment, the inclined portion 46S is formed at the base 46A of the end-side connecting portion 46.

[0048] like Figure 4 and Figure 5 As shown, the portions of the pair of side portions 44, 45 near the base ends 44A, 45A are connected by a base end connecting portion 48 in the width direction (left-right direction). The base end connecting portion 48 is connected to the portion of the pair of side portions 44, 45 near the base ends 44A, 45A between the front extensions 44F, 45F and the rear extensions 44R, 45R. The base end connecting portion 48 is connected to the same webbing 22 (see reference). Figure 3 The opposing surfaces, i.e. the front surface 48A, are orthogonal to each other as the thickness direction, forming a thin plate with flexibility.

[0049] like Figure 6 As shown, the base-end side connecting portion 48 is configured such that the middle portion 48M in the direction connecting the portions of the pair of side portions 44, 45 near the base ends 44A, 45A, i.e., the connecting direction W, is thinner than the other portions. To elaborate further, in this embodiment, the rear surface 48B of the base-end side connecting portion 48 is formed such that the middle portion 48M in the connecting direction W is recessed compared to the portions 48S on the sides in the connecting direction W. As an example, on the rear surface 48B of the base-end side connecting portion 48, the boundary portion 48N between the relatively thin middle portion 48M in the connecting direction W and the relatively thick portions 48S on the sides in the connecting direction W is formed at an angle. Furthermore, in this embodiment, the connecting direction W is the same as the width direction (left-right direction) of the protective member 40.

[0050] In addition, such as Figure 4 and Figure 5As shown, the front extensions 44F and 45F of the base ends 44A and 45A of the aforementioned pair of side portions 44 and 45 extend from the portion connected to the base end side connecting portion 48 in the direction facing the front surface 48A of the base end side connecting portion 48. Furthermore, when viewed from the axial direction of the pair of shaft portions 42 and 43, in the plate thickness direction of the base end side connecting portion 48, the base end side connecting portion 48 is offset (misaligned) relative to (not shown) the pair of shaft portions 42 and 43, and is configured such that even if... Figure 3 The amount of webbing 22 wound toward pulley 34 becomes maximum, and webbing 22 no longer contacts the base end side connection part 48.

[0051] In addition, such as Figure 4 and Figure 5 As shown, between a pair of side portions 44 and 45, on both sides of the central position CL relative to their spacing direction K, two elongated longitudinal connecting portions 50 and 51 are formed, respectively connecting the end-side connecting portion 46 and the base-side connecting portion 48. The two longitudinal connecting portions 50 and 51 are formed in a rod shape and are formed parallel to the rod-shaped portions 44B and 45B of the pair of side portions 44 and 45. As an example, the cross-sectional shape of the longitudinal connecting portions 50 and 51 orthogonal to the long side direction is approximately rectangular, and is set such that, excluding the portion near the base-side connecting portion 48, the length in the width direction (left-right direction) is less than the length in the thickness direction orthogonal to the width direction. The distance between the two longitudinal connecting portions 50 and 51 is set to be greater than that between the webbing 22 (see reference 22). Figure 3 The width of () is small. Furthermore, such as Figure 6 and Figure 7 As shown, relative to the base end side connecting portion 48, the two longitudinal connecting portions 50 and 51 are connected to the portions 48S on both sides of the width direction formed relatively thickly in the base end side connecting portion 48.

[0052] Next, use Figures 8A-8D opposite Figure 3 An example of the method of assembling the protective component 40 into the frame 32 shown is illustrated.

[0053] When assembling the protective component 40 into the frame 32, firstly, as... Figure 8A As shown, grasp the base-end connecting part 48 of the protective member 40 with your thumb F1, index finger F2, and ring finger F3, and insert a shaft part 42 of the protective member 40 into a hole 37 in a leg plate 32R of the frame 32 (lower part in the figure). Next, as shown... Figure 8B As shown, using the thumb F1, index finger F2, and ring finger F3, the base end connecting portion 48 of the protective member 40 is bent so that its front surface 48A side is concave.

[0054] Next, as Figure 8CAs shown, with the base end connecting portion 48 bent, the other shaft portion 43 of the protective member 40 is moved to the opposite position (directly below in the center of the figure) of the hole portion 36 of the other leg plate 32L of the frame 32. Then, as... Figure 8D As shown, by releasing the force that bent the base-end connecting portion 48, the base-end connecting portion 48 is elastically reset, and another shaft portion 43 of the protective member 40 is inserted into the hole portion 36 of the other leg plate 32L of the frame 32. Based on the above, the protective member 40 is assembled to the frame 32.

[0055] Next, the function of this embodiment will be explained.

[0056] exist Figure 3 In the webbing winding device 30 shown, the pulley 34 winds up the webbing 22 worn by the occupant. A pair of leg plates 32L and 32R are arranged on both sides of the pulley 34 with the axial direction of the pulley 34 as the opposing direction, and a frame 32 having the pair of leg plates 32L and 32R supports both ends of the pulley 34. Holes 36 and 37 are formed in the upper part of the pair of leg plates 32L and 32R, respectively, and are perpendicular to each other. Furthermore, the protective member 40 has a pair of shaft portions 42 and 43, a pair of side portions 44 and 45, an end-side connecting portion 46, and a base-end-side connecting portion 48. The shaft portions 42 and 43 are respectively inserted into the holes 36 and 37 of the pair of leg plates 32L and 32R. Thus, the protective member 40 can move about the axis of the pair of shaft portions 42 and 43.

[0057] like Figure 4 and Figure 5 As shown, in the protective member 40, the side portions 44 and 45 are formed into elongated strips, and shaft portions 42 and 43 are formed on the base end portions 44A and 45A side. Furthermore, an end-side connecting portion 46 connects the end portions 44C of the pair of side portions 44 and 45, and a through-hole for... Figure 3 The through-hole 46H through which the webbing 22 extending from the pulley 34 passes. Here, as described above, the protective member 40 can move about the axis of a pair of shafts 42, 43, so the position of the through-hole 46H can be changed according to the amount of winding of the webbing 22 toward the pulley 34 (see reference). Figure 1 ).

[0058] And, as Figure 4 and Figure 5 As shown, the base end connecting portion 48 of the protective member 40 connects the portions of the pair of side portions 44, 45 near the base ends 44A, 45A, and is connected to the same webbing 22 (see reference). Figure 3 The opposing front surfaces 48A are orthogonal in direction to the thickness direction and are formed into a thin plate, and the base end connecting portion 48 is flexible. Therefore, when the protective member 40 is directed towards... Figure 8AWhen the pair of leg plates 32L and 32R shown are assembled, they can be like... Figure 8B and Figure 8C As shown, use fingers F1, F2, and F3 to bend the base-side connecting portion 48, as indicated. Figure 8D As shown, the base-end connecting portion 48 elastically resets, allowing the shaft portions 42 and 43 to be inserted into the holes 36 and 37. Furthermore, the base-end connecting portion 48 has elasticity, thereby preventing the shaft portions 42 and 43 from disengaging from the holes 36 and 37. Therefore, it is unnecessary to provide, for example, anti-detachment bends at the ends of the shaft portions 42 and 43, avoiding the deterioration of assembly stability caused by such anti-detachment bends. Based on the above, the assembly stability when the base end of the protective member 40 is rotatably mounted to a pair of leg plates 32L and 32R of the frame 32 can be improved.

[0059] Furthermore, in this embodiment, such as Figure 4 and Figure 5 As shown, front extension portions 44F and 45F are formed at the base ends 44A and 45A of a pair of side portions 44 and 45, extending from the portion connected to the base end side connecting portion 48 toward the front surface 48A of the base end side connecting portion 48. A pair of shaft portions 42 and 43 are formed on the outer surface 44F2 and 45F2 of the pair of front extension portions 44F and 45F, opposite to the inner surfaces 44F1 and 45F1 that are opposed to each other. When viewed from the axial direction of the pair of shaft portions 42 and 43, the base end side connecting portion 48 is offset relative to (not shown) the pair of shaft portions 42 and 43 in the plate thickness direction of the base end side connecting portion 48. Therefore, even in Figure 3 Even with a larger winding amount of the webbing 22 on the pulley 34, it is possible to prevent the webbing 22 from contacting the base end connecting portion 48, which is beneficial for the overall miniaturization of the webbing winding device 30. In addition, in order to assemble the protective member 40 onto the pair of leg plates 32L, 32R, the bending amount of the base end connecting portion 48 when bending can be minimized.

[0060] Here, use Figure 9A and Figure 9B A supplementary explanation is provided regarding the amount of bending of the base end connecting portion 48 during the assembly of the protective component 40. Figure 9A This is a schematic diagram illustrating the amount of bending of the base-side connecting portion 148 during assembly of the protective member 140 in another example. Figure 9B This is a diagram schematically showing the amount of bending of the base end connecting portion 48 during the assembly of the protective member 40 according to this embodiment.

[0061] Figure 9AIn another example shown, the protective member 140 is configured such that, in the state before the base-end connecting portion 148 is bent (illustration omitted), when viewed from the axial direction of the pair of shaft portions 142, 143, the base-end connecting portion 148 is not offset relative to the pair of shaft portions 142, 143 in the thickness direction of the base-end connecting portion 148. Therefore, the bending amount (bending angle θ1) of the base-end connecting portion 148 when bending it to assemble the protective member 140 to the pair of leg plates 32L, 32R must be increased. In contrast, Figure 9B The protective member 40 shown in this embodiment is in its state before the base end connecting portion 48 is bent (see reference). Figures 4-7 When viewed from the axial direction of the pair of shaft portions 42 and 43, the base end connecting portion 48 is offset relative to the pair of shaft portions 42 and 43 in the plate thickness direction of the base end connecting portion 48. Therefore, with Figure 9A Compared to the other example shown, it is possible to make in order to Figure 9B The protective element 40 shown is assembled on a pair of leg plates 32L and 32R, which reduces the amount of bending (bending angle θ2) when the base end connecting part 48 is bent.

[0062] In addition, such as Figure 6 As shown, in this embodiment, the base-end side connecting portion 48 is configured such that the middle portion 48M in the direction where the portions of the pair of side portions 44, 45 near the base ends 44A, 45A are connected, i.e., in the connecting direction W, is thinner than the other portions. Therefore, when the protective member 40 is assembled onto the pair of leg plates 32L, 32R (see reference...), Figure 8A When (etc.), the base end connecting part 48 can be easily bent.

[0063] Furthermore, in this embodiment, between a pair of side portions 44 and 45, at both sides relative to the central position CL in the interval direction K, two elongated longitudinal connecting portions 50 and 51 are formed, respectively connecting the end-side connecting portion 46 and the base-side connecting portion 48. The distance between the two longitudinal connecting portions 50 and 51 is set to be greater than that between the webbing 22 (see reference 22). Figure 3 The width of ) is small. Therefore, as Figure 10 and Figure 11 As shown, when the webbing 22 is brought close to the pulley 34 (see reference) Figure 11 When this side (arrow P direction) passes through the through section 46H, it is possible to make... Figure 11 The two longitudinal connecting portions 50 and 51 shown are used to place the webbing 22 on one side so that the webbing 22 passes through the through portion 46H.

[0064] Furthermore, in this embodiment, such as Figure 6 and Figure 7As shown, relative to the base-end side connecting portion 48, the two longitudinal connecting portions 50, 51 are connected to the portions 48S on both sides of the width direction formed relatively thickly in the base-end side connecting portion 48. In such a structure, when the protective member 40 is formed by the mold, the fluidity of the resin flowing into the area in the mold where the two longitudinal connecting portions 50, 51 are formed can be well ensured, and the resin can be prevented from solidifying midway.

[0065] In addition, such as Figure 4 As shown, in this embodiment, the end-side connecting portion 46 is closer to the pulley 34 than the through portion 46H (see reference). Figure 3 This side (in other words, Figure 4 The end face 46E (lower part of the diagram) is oriented towards the webbing 22 (see reference). Figure 3 The inclined portion 46S, which is adjacent to this side and slopes towards the through portion 46H. Therefore, as... Figure 11 As shown, when the webbing 22 passes through the through portion 46H, the end of the webbing 22 is less likely to get caught on the end face 46E of the end-side connecting portion 46, which is located on the side of the pulley 34 that is closer to the through portion 46H than the through portion 46H, and the webbing 22 can easily pass through the through portion 46H.

[0066] In addition, such as Figure 6 As shown, in this embodiment, as an example, the cross-sectional shape of most of the rod-shaped portions 44B, 45B of the pair of side portions 44, 45 and the longitudinal connecting portions 50, 51 (excluding the portion near the base end connecting portion 48) orthogonal to the long side direction is set such that the length in the width direction (left-right direction) is less than the length in the thickness direction orthogonal to the width direction. Therefore, as Figure 12 As shown, the webbing 22 is pulled in an inclined direction (refer to arrow D) and passes through the end connection portion 46H of the protective member 40 to the end side connection portion 46 (refer to...). Figure 3 When a lateral load F is applied, the rod-shaped portions 44B and 45B of the pair of side portions 44 and 45 and the longitudinal connecting portions 50 and 51 undergo elastic deformation. Therefore, deformation of the surrounding areas of the shaft portions 42 and 43 can be suppressed, and the detachment of the shaft portions 42 and 43 can be prevented.

[0067] Additionally, the webbing 22 is pulled in an inclined direction (refer to arrow D), for example causing the webbing 22 to... Figure 1 The direction of extension of the slit in the border 24 shown ( Figure 1 In cases where the end of the webbing 22 is close to one side in the direction perpendicular to the paper, the end portion of the webbing 22 in the width direction enters the slit and bends in a J-shape (illustration omitted) into the end portion, etc.

[0068] (Supplementary explanation of the implementation method)

[0069] In addition, Figures 1-8D and Figures 9B-12 In the above embodiment shown, a pair of shaft portions 42 and 43 are formed on the outer surfaces 44F2 and 45F2 of the front extension portions 44F and 45F. When viewed from the axial direction of the pair of shaft portions 42 and 43, the base end connecting portion 48 is offset relative to the pair of shaft portions 42 and 43 in the plate thickness direction of the base end connecting portion 48. Although such a structure is preferred, as a variation, the following structure may also be adopted: when viewed from the axial direction of the pair of shaft portions (42 and 43), the base end connecting portion (48) is not offset relative to the pair of shaft portions (42 and 43) in the plate thickness direction of the base end connecting portion (48).

[0070] Furthermore, in the above embodiment, the base end side connecting portion 48 is configured such that the middle portion 48M in the direction of connecting the portions of the pair of side portions 44, 45 on the side of the base end portions 44A, 45A is thinner than the other portions. Although such a structure is preferred, as a variation, a structure different from the structure of the above embodiment may also be adopted, such as a constant plate thickness for the base end side connecting portion.

[0071] Furthermore, in the above embodiment, between a pair of side portions 44 and 45, on both sides of the central position CL in the interval direction K, two longitudinal connecting portions 50 and 51 are formed respectively connecting the end-side connecting portion 46 and the base-side connecting portion 48. Although such a structure is preferred, as a variation, a structure in which one or more longitudinal connecting portions connecting the end-side connecting portion (46) and the base-side connecting portion (48) are formed may also be adopted, or a structure in which no such longitudinal connecting portions are formed may be adopted.

[0072] Furthermore, in the above embodiment, the end face 46E of the end connecting portion 46, which is located on the side of the pulley 34 closer to the through portion 46H, has an inclined portion 46S that is inclined toward the through portion 46H towards the side adjacent to the webbing 22. Although such a structure is preferred, as a variation, a structure without such an inclined portion 46S may also be adopted.

[0073] Furthermore, the above-described embodiments and various modifications can be appropriately combined and implemented.

[0074] The above describes one example of the present invention, but the present invention is not limited to the above content. It is self-evident that various modifications can be made to implement it without departing from its spirit.

Claims

1. A webbing winding device, characterized in that, have: A reel that winds up the webbing worn by the occupants; A frame having a pair of leg plates arranged on opposite sides of the winding shaft along its axial direction to support both ends of the winding shaft, and having through holes formed in the upper part of the pair of leg plates and in their opposing portions; and The protective member has a pair of shaft portions inserted into the holes of the pair of leg plates, a pair of elongated side portions formed on the base end side of the shaft portions, an end-side connecting portion that connects the end portions of the pair of side portions and has a through portion through which the webbing extending from the take-up shaft passes, and a flexible base-side connecting portion that connects the base end portions of the pair of side portions and is formed in a thin plate shape with the thickness direction being orthogonal to the plane facing the webbing, i.e., the front surface.

2. The webbing winding device according to claim 1, characterized in that, An extension portion is formed at the base end of the pair of side portions, extending from the portion connected to the base end side connection portion in a direction toward the front surface of the base end side connection portion. The pair of shaft portions are formed on the outer surface side opposite to the inner surface side of the pair of extension portions. When viewed from the axial direction of the pair of shafts, the base end connecting portion is offset relative to the pair of shafts in the plate thickness direction of the base end connecting portion.

3. The webbing winding device according to claim 1, characterized in that, The base end side connecting portion is configured such that the middle portion in the direction connecting the portions of the pair of side portions on the base end side is thinner than the other portions.

4. The webbing winding device according to claim 1, characterized in that, Between the pair of side portions, on both sides of the central position relative to the spacing direction of the pair of side portions, two long longitudinal connecting portions are formed, which respectively connect the end side connecting portion and the base side connecting portion, and the distance between the two longitudinal connecting portions is set to be smaller than the width of the webbing.

5. The webbing winding device according to claim 1, characterized in that, The end face of the end-side connecting portion, which is positioned closer to the take-up shaft than the through portion, has an inclined portion that slopes toward the through portion toward the side adjacent to the webbing.

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