JP3246269U - seat belt fastener - Google Patents

Abstract

[Problem] To provide a seat belt fastener that can be retrofitted to a seat belt, does not impair the original functions of the seat belt, and can prevent the seat belt from tightening and release it with a simple operation. [Solution] The seat belt fastener 1 comprises a housing slidably attached to the seat belt 200, and a lever rotatably attached to the housing, the housing is configured to be detachably attached to the seat belt 200 via a slit created by its elastic deformation, and is attached to a pillar 400 around a sling 403 via a sling 300, the lever is configured so that the tip of the lever bites into the seat belt 200 when the lever is rotated, and the tip of the lever automatically detaches from the seat belt 200 when the seat belt 200 is pulled. [Selected Figure] Figure 1

Description

This invention relates to a seat belt fastener that prevents the seat belt from tightening.

For example, Patent Document 1 discloses a stopper that is attached near the sling and can slide freely along the seat belt. As shown in FIG. 10, in this stopper 500, a seat belt 503 is inserted through openings 502 formed on both sides of a frame-shaped main body 501. The seat belt 503 is inserted into the opening 502 through a cut groove 505 in the frame-shaped main body 501. A pressing plate 506 is provided inside the opening 502, and a spring 507 constantly applies a resilient force to this pressing plate 506 toward the seat belt 503.

In the stopper 500 of Patent Document 1, the length of the seat belt 503 is adjusted by pressing the end of the presser plate 506, and then the pressure on the end of the presser plate 506 is released. Then, the pressing plate 506 is pressed against the seat belt 503 by the elastic force of the spring 507.

However, with this, when the automobile suddenly stops, the seat belt 503 can only secure the passenger to the seat within the range in which the length is adjusted. Therefore, if the seat belt 503 is adjusted to be too long, there is a risk that the seat belt 503 will not be able to perform its original function.

The present invention was developed in consideration of the above circumstances, and its purpose is to provide a seat belt fastener that can be retrofitted to a seat belt, does not impede the seat belt's original function, and can prevent the seat belt from tightening and release it with a simple operation.

The inventor of the present invention has previously developed a similar technology (see Patent Document 2), but previously, a box large enough to cover the entire seat belt sling was used, and the housing was fastened to this box via a connecting member. Recently, however, the box has become small enough to only cover the support part of the seat belt sling, and it is no longer possible to fasten the connecting member there, so it has become necessary to find another location around the sling.

The present invention, which was created in response to such requests, includes a housing that is pulled out from a winding device, folded back with a hanger, and slidably attached to a seat belt that is fixed to a fixing device, and a rotatable housing attached to the housing. and a lever to which the suspension is attached, the housing being configured to be removably attached to the seatbelt through a cut caused by elastic deformation of the housing, and the suspension The lever is attached to the vehicle body around the seat belt via a connecting member, and the lever is elastically biased in the opposite direction to the rotation operation that causes the tip of the lever to bite into the seat belt, and the tip of the lever is , the lever is provided with an inclined surface that is inclined at an acute angle with respect to the seat belt when biting into the seat belt, and is substantially parallel to the seat belt when detached from the seat belt; By a dynamic operation, the tip of the lever bites into the seat belt, and by a tension operation of the seat belt, the reaction force of the tension operation force cooperates with the elastic biasing force to move the lever on the housing. The present invention is characterized in that the tip of the lever is automatically disengaged from the seat belt by rotating in a direction opposite to the rotation operation.

According to this invention, the housing is configured to be detachably attached to the seat belt through a slit created by the elastic deformation of the housing, and is attached to the vehicle body around the sling via a connecting member, so regardless of the size of the box that covers the seat belt sling, it is easy to retrofit the housing to the seat belt and attach the connecting member, and it is also easy to replace them, which is convenient.

Further, according to the present invention, the lever is elastically biased in a direction opposite to the rotation operation that causes the tip of the lever to bite into the seat belt, and the tip of the lever does not bite into the seat belt. It is provided with an inclined surface that sometimes slopes at an acute angle with respect to the seat belt, and that becomes approximately parallel to the seat belt when detached from the seat belt, and when the lever is rotated, the lever is rotated. While the tip is biting into the seat belt, by pulling the seat belt, the reaction force of the pulling operation force and the elastic biasing force cooperate to move the lever on the housing in the opposite direction to the rotating operation. The tip of the lever is automatically disengaged from the seat belt by rotating it in the direction, so there is no risk of interfering with the original function of the seat belt, and the seat belt can be tightened with just a simple operation. It is possible to prevent and cancel the problem.

As in the device described in claim 2, the connecting member is attached to a hook that is affixed to the vehicle body around the sling, and the tip of the hook is preferably bent inwardly of the hook so that the connecting member is difficult to come off.

According to the device described in claim 2, the connecting member is attached to a hook that is attached to the vehicle body around the sling, and the tip of the hook is bent inwardly of the hook so that the connecting member is difficult to remove. Therefore, although the connecting member is easy to attach and remove, there is no risk of the connecting member falling off the hook by itself.

As in the device described in claim 3, it is preferable that the lever is provided with a spring or rubber member that elastically biases the lever in the direction opposite to the rotation operation.

According to the invention described in claim 3, the lever is provided with a spring or rubber member that elastically biases the lever in the direction opposite to the rotation operation, which allows for a wider range of elastic materials to be selected.

According to a fourth aspect of the present invention, it is preferable that the lever has a bent part in the middle in the longitudinal direction of the lever, and is formed in an L-shape with the center of rotation around the bent part.

According to the invention described in claim 4, the lever has a bent portion in the middle of the longitudinal direction of the lever, and is formed in an L-shape with the vicinity of the bent portion as the center of rotation, so that the amount of protrusion of the lever from the housing is reduced.

According to the invention described in claim 5, when the tip of the lever is bitten into the seat belt placed on the bottom surface of the casing, the operating side of the lever is approximately in contact with the top surface of the casing. Preferably, they are formed flush.

According to the invention described in claim 5, the operating side of the lever is formed so that when the tip of the lever is inserted into the seat belt placed on the bottom surface of the housing, it is approximately flush with the top surface of the housing, so that the amount of protrusion of the lever from the housing is minimized.

As in the device described in claim 6, a spacer is provided that is slidably attached to the seat belt between the sling and the housing, and the spacer is configured to be detachably attached to the seat belt through a slit that is generated by the elastic deformation of the spacer, and one end of the spacer is preferably attached to the vehicle body around the sling via a first connecting member, and the other end of the spacer is preferably attached to the housing via a second connecting member.

According to the invention described in claim 6, a spacer is provided that is slidably attached to the seat belt between the sling and the housing, and the spacer is configured to be detachably attached to the seat belt through a slit created by elastic deformation of the spacer, and one end of the spacer is attached to the vehicle body around the sling via a first connecting member, and the other end of the spacer is attached to the housing via a second connecting member, so that the seat belt fastener is closer to the occupant, making it easier to operate and increasing the number of compatible models.

According to the present invention, the casing is configured to be detachably attached to the seat belt through a cut caused by elastic deformation of the casing, and is configured to be attached to the vehicle body around the hanging device via a connecting member. Regardless of the size of the box that covers the seatbelt hanging device, it is easy to retrofit the housing to the seatbelt and attach the connecting member, and it is also easy to replace them. It is convenient.

Further, according to the present invention, the lever is elastically biased in a direction opposite to the rotation operation that causes the tip of the lever to bite into the seat belt, and the tip of the lever does not bite into the seat belt. It is provided with an inclined surface that sometimes slopes at an acute angle with respect to the seat belt, and that becomes approximately parallel to the seat belt when detached from the seat belt, and when the lever is rotated, the lever is rotated. While the tip is biting into the seat belt, by pulling the seat belt, the reaction force of the pulling operation force and the elastic biasing force cooperate to move the lever on the housing in the opposite direction to the rotating operation. The tip of the lever is automatically disengaged from the seat belt by rotating it in the direction, so there is no risk of interfering with the original function of the seat belt, and the seat belt can be tightened with just a simple operation. It is possible to prevent and cancel the problem.

FIG. 2 is a conceptual diagram showing an example of use of the seat belt fastener according to Embodiment 1 of the present invention. 1 is a perspective view showing the overall configuration of a seat belt fastener according to Embodiment 1 of the present invention. 1 is a side view showing the overall configuration of a seatbelt fastener according to Embodiment 1. FIG. 1 is a plan view showing the overall configuration of a seatbelt fastener according to Embodiment 1. FIG. 1 is a front view showing an overall configuration of a seat belt fastener according to a first embodiment. 1A is an explanatory diagram showing a partial configuration around the suspender of a seat belt in embodiment 1, where (a) is a perspective view showing the suspender and its surroundings of a recent automobile, (b) is a side view of a hook, and (c) is a conceptual diagram of an adjuster. 11 is a side view (first and second modes) showing the overall configuration of a seat belt fastener according to a second embodiment. FIG. FIG. 11 is a plan view (first mode) showing the overall configuration of a seat belt fastener according to a second embodiment. FIG. 7 is a plan view (second mode) showing the overall configuration of the seat belt fastener according to the second embodiment. FIG. 2 is a perspective view showing the overall configuration of an example of a conventional seat belt fastener.

(Embodiment 1)
Fig. 1 is a conceptual diagram showing an example of use of a seat belt fastener 1 according to the first embodiment of the present invention. As shown in Fig. 1, a seat belt 200 folded back from a retractor 404 by a suspender 403 fixed to the inner wall of a vehicle body 400 is wound around the front of a passenger 100 sitting in a seat 405. A metal fitting 401 attached to the tip of the seat belt 200 is inserted into a fixing device (corresponding to a fixing tool) 402 provided on the side of the seat 405, and is fixed to the fixing device 402.

At this time, the seat belt fastener 1 according to the first embodiment is slidably attached to the seat belt 200 near the hanging tool 403. Note that the seat belt fastener 1 is attached to a pillar (corresponding to the vehicle body) around a hanging tool 403 using a sling 300 as a connecting member, and is placed above the shoulder of the passenger 100.

Figure 2 is a perspective view showing the overall configuration of a seat belt fastener 1 according to embodiment 1 of the present invention, Figure 3 is a side view thereof, Figure 4 is a plan view thereof, and Figure 5 is a front view thereof. For convenience of explanation, the thickness dimensions of the seat belt fastener 1 in Figures 2 to 5 are shown somewhat exaggerated, with the thickness direction being the up-down direction and the perpendicular directions being the front-rear and left-right directions. Details of the seat belt fastener 1 will be described below with reference to Figures 2 to 5. The seat belt fastener 1 comprises a housing 11 slidably attached to the seat belt 200, a lever 12 rotatably attached around a rotation axis 14 of the housing 11, and a spiral spring 13 that elastically biases the lever 12 against the housing 11.

The casing 11 is made of, for example, a synthetic resin and has a somewhat flat hollow rectangular prism shape, and is composed of a bottom surface 111, a top surface 112, and left and right side surfaces 113, 114 (115). The seatbelt 200 has large openings at the front and rear to allow the seatbelt 200 to pass through, and its interior has a smooth structure with almost no burrs or the like that prevent the seatbelt 200 from moving, other than the tip 121 of the lever 12. ). Of these, a square hole 117 of a predetermined size is formed approximately in the center of the upper surface 112. Further, the side surfaces 114 (115) are adapted to engage with each other near the center in the height direction in FIG. That is, the tip of the upper side surface 114 slightly protrudes outward, and the tip of the lower side surface 115 is slightly recessed inward so that the tip of the upper side surface 114 fits therein.

When the top surface 112 of the casing 11 is pulled up relative to the bottom surface 111, a cut 15 is created between the side surfaces 114 and 115 due to elastic deformation of the casing 11, and the engagement between the side surfaces 114 and 115 is released. be done. By inserting the seat belt 200 through the cut 15 and pressing the top surface 112 against the bottom surface 111 to close the cut 15, the side surfaces 114 and 115 are engaged, and the housing 11 is detachably attached to the seat belt 200. I can do it. As a result, even when purchasing a new car or a used car, for example, it is convenient to be able to retrofit the seat belt 200 and to easily replace it.

A vertical hole p5 is drilled in the rear of the top surface 112 of the housing 11, and one end of the sling 300 is inserted into the vertical hole p5, forming a knot to prevent it from slipping out.

By cutting and raising the central portion of the upper surface 112 of the housing 11 to the left and right, side plates 116 and 116 are provided on both left and right sides of a square hole 117 formed in the central portion so as to be substantially parallel to the side surfaces 113 and 114, respectively. will be erected. Horizontal holes p1, p1 for inserting the rotation shaft 14 are bored in substantially the center of both side plates 116, 116. Further, the one side plate 116 is provided with a horizontal hole p2 for locking one end of the spring 13 at a lower rear side in FIG. 3 than the horizontal hole p1.

The lever 12 is, for example, a slightly flattened solid rectangular prism made of synthetic resin, and consists of an operating end 122 that is operated by the occupant, and a tip 121 that is on the opposite side of the operating end 122 and faces the seat belt 200. The tip 121 has an inclined surface that is inclined at an acute angle to the seat belt 200 when the lever is engaged with the seat belt 200, and is approximately parallel to the seat belt 200 when the lever is released from the seat belt 200.

The lever 12 has a horizontal hole p3 drilled near the center of its side in the longitudinal direction for inserting the pivot shaft 14, and a horizontal hole p4 drilled between the horizontal hole p3 and the operating end 122 for engaging the other end of the spring 13.

The tip 121 of the lever 12 is inserted into the square hole 117 between the side plates 116, 116, and then the pivot shaft 14 is inserted through the horizontal holes p1, p1 near the center of the side plates 116, 116, so that the lever 12 can be rotated around the pivot shaft 14, and this rotation operation allows the tip 121 of the lever 12 to be inserted into the seat belt 200. Spacers (not shown) are interposed between one side plate 116 and the lever 12, and between the lever 12 and the other side plate 116, respectively, to allow smooth rotation of the lever 12.

Then, one end of the spring 13 is engaged with the horizontal hole p2 of the side plate 116, and the other end of the spring 13 is engaged with the horizontal hole p4 of the lever 12 while the spring 13 is slightly twisted, so that the lever 12 is elastically biased in the opposite direction to the rotational operation relative to the housing 11.

Figure 6 is an explanatory diagram showing the partial configuration of the sling 403 of the seat belt 200, where (a) is a perspective view showing the sling 403 of a modern automobile, (b) is a side view of the hook 460, and (c) is a conceptual diagram of the adjuster 470. Note that in the figure, slings 300a and 300b are both read as sling 300 when there is no spacer 250.

As described above, when the box 403a covering the sling 403 of the seat belt 200 is small, one end of the sling 300 is attached to the rear of the upper surface 112 of the housing 11, while the other end of the sling 300 is attached by a hook 460 affixed to the pillar 400 around the sling 403, as shown in FIG. 6(a). As shown in FIG. 6(b), the hook 460 has a base 462 affixed to the pillar 400 with double-sided tape 461, and the tip of the hook body 463 extending in a U-shaped branch shape from the base 462 is bent inward to leave a small gap between the base 562 and the hook body 463. A loop 301 formed by an adjuster 470 or the like is fitted into the tip of the sling 300 through this gap.

As shown in FIG. 6(c), the adjuster 470 has two horizontal holes p11 and p12 on the upper and lower sides or on the left and right, each of which has a manually operable retaining member 472 in the adjuster body 471. Reference numeral 472 is for pressing the sling 300 which is inserted into the horizontal holes p11 and p12 by being brought into contact with and detachable from the sling 300 by manual operation. The procedure is to first take out the sling 300 taken from the left side of the horizontal hole p11 from the right side of the horizontal hole p11 with the retaining member 472 spaced apart from the sling 300 inserted through the horizontal holes p11 and p12. The folded sling 300 is taken in from the right side of the horizontal hole p12 and taken out from the left side of the horizontal hole p12, so that a part of the folded back forms a loop 301.

The adjuster 470 can easily adjust the effective length of the sling 300 by changing the folding position of the sling 300 and the size of the loop 301 according to the attachment position of the housing 11 to the seat belt 200. The effective length of the sling 300 here refers to the distance from the housing 11 to the hook 460 plus an adjustment allowance. After this adjustment, the effective length of the sling 300 can be fixed by abutting and pressing the anti-slip member 472 against the sling 300 inserted through the horizontal holes p11 and p12.

Then, by fitting the loop 301 formed on the other end of the sling 300 into the hook 460, the housing 11 can be attached to the pillar 400 around the sling 403 via the sling 300, and by pulling the seat belt 200, the lever 12 can be easily rotated on the housing 11 by the cooperation of the reaction force of the pulling force and the elastic return force of the spring 13. This makes it possible to reliably detach the tip of the lever from the seat belt and reliably maintain that state.

Furthermore, by providing the hook 460 and the adjuster 470 on the other end side of the sling 300, the housing 11 can be fixed to or loosened from the pillar 400 around the hanging tool 403 with a single touch, so anyone can easily be able to use it.

By the way, there are some car models in which the suspension 403 of the seatbelt 200 is too far from the seat 405 in the rear seat, driver's seat, or passenger's seat, making it difficult for the passenger 100 to operate the seatbelt fastener 1. In such a case, as shown in FIG. 6(a), a spacer 250 of a predetermined length is provided which is slidably attached to the seat belt 200 between the hanging tool 403 and the housing 11. The predetermined length is set according to the distance from the seat 405 to the hanging tool 403 of the seat belt 200, but the other shape of the spacer 250 is almost the same as that of the housing 11 except for the area around the lever 12. That's fine.

In other words, the spacer 250 is configured to be detachably attached to the seat belt 250 through a cut caused by its elastic deformation, and the rear portion of the spacer 250 is attached to the pillar 400 around the hanging tool 403 with a sling (the third The other end of the spacer 250 is attached to the housing 11 via a sling (corresponding to a second connecting member) 300b. do. This brings the seat belt fastener 1 closer to the passenger 100, making it easier to operate and increasing the number of compatible models. Note that the slings 300a and 300b may be combined into a single sling 300, and the sling 300 may be locked at a proper position on the spacer 250.

A method of using the seat belt fastener 1 constructed in this manner will be described below with reference to FIG. 1 again. First, as shown in FIG. 1, a seat belt 200 is attached to a passenger. At this time, it is assumed that the seat belt 200 is almost completely wound up by the winding device 404, and the metal fitting 401 attached to its tip is slightly below the hanging device 403. With the other end of the sling 300 attached to the pillar 400 around the hanging tool 403, the seat belt fastener 1 is located in front of the metal fitting 401 of the seat belt 200, about above the shoulder of the passenger. As described above, the method for attaching the seat belt fastener 1 to the seat belt 200 is to insert the seat belt 200 in the front-rear direction through the cut 15 between the side plates 114 and 115, which is created by elastically deforming the housing 11. shall be carried out.

The seat belt fastener 1 attached to the seat belt 200 slides along the seat belt 200 pulled out from the retractor 404 via the sling 403, but remains in the above position because it is attached to the pillar 400 around the sling 403 via the sling 300. The pulled out seat belt 200 is then passed through the front of the occupant 100 and secured to the fastening device 402 by the metal fittings 401.

After the passenger adjusts the seat belt 200 to an appropriate length, the passenger rotates the operating end 122 of the lever 12 of the seat belt fastener 1, so that the tip 121 of the lever 12 is attached to the seat belt inside the housing 11. 200, resulting in a so-called locked state. Therefore, the seatbelt 200 will not normally be rewound by the retractor 404 beyond the range in which its length has been adjusted, so the passenger 100 will no longer feel pressure on his or her chest due to the seatbelt 200. , the passenger 100 will no longer get in the way when he or she takes action.

Furthermore, when the car suddenly stops, the seat belt 200 is pulled beyond the range in which the length has been adjusted. According to the present embodiment, the tensioning operation of the seat belt 200 causes the tip of the lever 12 to move toward the housing 11. The vehicle automatically disengages from the seat belt 200 within the range. Therefore, even if the seat belt 200 has been adjusted to an excessively long length, when the car suddenly stops, the seat belt 200 will extend beyond the adjusted length and the seat belt 200 will be retracted by the retractor. It will be rewound at 404. As a result, the passenger 100 is securely fixed to the seat 405, and the original function of the seat belt 200 is not hindered.

Further, when the passenger exits the vehicle, the passenger 100 removes the metal fitting 401 of the seat belt 200 from the fixing device 402, but at this time, by pulling the seat belt 200 slightly, the casing of the seat belt fastener 1 is removed. The sling 300 attached to the upper surface 112 of the body 11 is pulled between the hanging tool 403 and the seat belt fastener 1. As a result, the seat belt 200 and the housing 11 are pulled in opposite directions, so that the locked tip 121 of the lever 12 comes off the seat belt 200 and returns to the substantially parallel state.

The seat belt 200 is then automatically wound into the retractor 404 via the sling 403 and returns to its original state. As a result, the seat belt 200 does not hang down long on the seat 405 or in its vicinity, so the seat belt 200 does not get in the way of getting in and out of the vehicle, and it does not get caught in a door (not shown) and impede the smooth opening and closing of the door.

In other words, the seat belt fastener 1 of this embodiment 1 can be retrofitted to the seat belt 200 without interfering with the original function of the seat belt 200, and can prevent the seat belt 200 from tightening and release it with just a simple operation.

(Embodiment 2)
By the way, there is a demand for miniaturization of the first embodiment. In order to meet such demands, the present inventor made further efforts and devised the second embodiment. FIG. 7 is a side view (first and second modes) showing the overall configuration of a seat belt fastener 1b according to Embodiment 2 of the present invention, FIG. 8 is a plan view thereof (first mode), and FIG. 9 is a plan view ( (second mode). Here, the first mode refers to a mode in which the operating end 122 of the lever 12a hardly protrudes from the upper surface 112 of the casing 11, and the second mode refers to a mode in which the operating end 122 of the lever 12a hardly protrudes from the upper surface 112 of the casing 11. Refers to a protruding form. Hereinafter, details of the seat belt fastener 1b according to the second embodiment will be explained with reference to FIGS. 1 and 7 to 9. However, the seatbelt fastener 1 in FIG. 1 is read as 1b, and elements common to those in the first embodiment are given the same numbers and redundant explanations are omitted.

As shown in Figures 7 to 9, the seat belt fastener 1b includes a housing 11 that is slidably attached to the seat belt 200, a lever 12a that is rotatably attached around a rotation axis 14 of the housing 11, and a rubber cord 13a that serves as a rubber member that elastically biases the lever 12a against the housing 11.

The casing 11 is a somewhat flat hollow quadrangular column made of synthetic resin, for example, and includes a bottom surface 111, a top surface 112, and left and right side surfaces 113, 114 (115). A square hole 117a having a semicircular notch 118 at the front is formed approximately in the center of the upper surface 112. The square hole 117a has a size that allows the lever 12a to be accommodated comfortably in the first mode, and the notch 118 allows you to insert your finger here to operate the lever 12a when shifting to the second mode. The end 122 is provided so that it can be easily grasped. However, when the square hole 117a reaches the front end of the upper surface 112 of the housing 11, the notch 118 is not necessary.

As in the first embodiment, the side surfaces 114 (115) engage with each other near the center in the height direction of the housing 11, allowing for easy retrofitting to the seat belt 200 and easy replacement. Vertical holes p5 and p6 are drilled in the rear of the top surface 112 of the housing 11, and one end of the sling 300 is engaged in the vertical hole p5, and one end of the rubber cord 13a is engaged in the vertical hole p6. Horizontal holes p21 and p21 for inserting the rotating shaft 14 are drilled approximately in the center of the left and right side surfaces 113 and 114.

The lever 12a is significantly different from the first embodiment, and has a shape such as a slightly flat solid quadrangular prism made of, for example, synthetic resin, bent at the middle in the longitudinal direction. For this reason, the lever 12a has a bent portion 123 in the middle of its longitudinal direction, and is formed in an L-shape with its rotation center around the bent portion 123. Further, the lever 12a has an operating end 122 for the passenger to operate, and a tip 121 that is bent at a substantially right angle when viewed from the operating end 122 and faces the seat belt 200. The tip 121 has an inclined surface that is inclined at an acute angle with respect to the seat belt 200 when biting into the seat belt 200, and is substantially parallel to the seat belt 200 when detached from the seat belt 200. . The upper side from the operating end 122 to the bent part 123 of the lever 12a is connected to the upper surface 111 of the housing 11 when the tip of the lever 12a is bitten into the seat belt 200 placed on the bottom surface 111 of the housing 11. (first mode). Further, the lever 12a has a horizontal hole p22 formed in its bent portion 123 through which the rotation shaft 14 is inserted, and a horizontal hole p22 formed in the operating end 122 side to engage the other end side of the rubber string 13a. It is provided with a vertical hole p7 for stopping.

Next, the tip 121 of the lever 12a is inserted into the square hole 117a, and the rotation shaft 14 is inserted through the horizontal holes p21, p21 bored near the center of the left and right side plates 113, 114 of the housing 11 in the front and back direction. By inserting the lever 12a, the lever 12a can be rotated around the rotation shaft 14. This rotational operation allows the tip 121 of the lever 12a to bite into the seat belt 200. Note that spacers (not shown) are interposed between the left and right side plates 113, 114 and the lever 12a, respectively, so that the lever 12a can be rotated smoothly.

Then, one end of the elastic cord 13a is engaged with a vertical hole p6 at the rear of the top surface 112 of the housing 11, and the other end is engaged with a vertical hole p7 on the operating end 122 side of the lever 12a, so that the lever 12a is elastically biased relative to the housing 11 in the direction opposite to the rotation operation.

A method of using the seat belt fastener 1b constructed in this manner will be described below with reference to FIG. 1. It is assumed that the initial state of the seat belt fastener 1b is a second mode in which the lever 12a protrudes from the upper surface 112 of the housing 11. Here, when the seat belt fastener 1b is in the first mode in which the lever 12a hardly protrudes from the upper surface 112 of the housing 11, the operating end 122 is hidden, and the elastic force acting on the operating lever 12a is attached. Since the force acts in the direction along the top surface of the housing 11, it is difficult to rotate the operating lever 12a. Therefore, by grasping the operating end 122 of the operating lever 12a, which is visible through the semicircular notch 118 provided in front of the square hole 117a, with your fingers and pulling it up a little, an elastic biasing force is applied to the operating lever 12a. Then, the operating end 122 is automatically made to protrude from the upper surface 112 of the housing 11, and the second mode is entered.

After the seatbelt fastener 1b is in the above-mentioned initial state, the seatbelt 200 is first attached to the passenger as shown in FIG. At this time, it is assumed that the seat belt 200 is almost completely wound up by the winding device 404, and the metal fitting 401 attached to its tip is slightly below the hanging device 403. With the other end of the sling 300 attached to the pillar 400 around the hanging tool 403, the seat belt fastener 1b is located in front of the metal fitting 401 of the seat belt 200, approximately above the shoulder of the passenger. As described above, the method for attaching the seat belt fastener 1b to the seat belt 200 is to insert the seat belt 200 in the front-rear direction through the cut 15 between the side plates 114 and 115, which is created by elastically deforming the housing 11. shall be carried out.

The seatbelt fastener 1b attached to the seatbelt 200 slides along the seatbelt 200 pulled out from the retractor 404 via the hanger 403, and the sling 300 is attached to the pillar 400 around the hanger 403. Although the seat belt 200 remains in the above position since it is attached through the seat belt 200, the seat belt 200 that has been pulled out is further passed through the front of the passenger 100 and then fixed to the fixing device 402 with the metal fitting 401.

After the passenger adjusts the length of the seat belt 200 to an appropriate length, the operating end 122 of the lever 122 of the seat belt fastener 1b is pressed against the upper surface 112 of the housing 11 and rotated, so that the tip 121 of the lever 12a bites into the seat belt 200 in the housing 11, and the seat belt is locked (at this time, the first mode is set in which the lever 12a hardly protrudes from the upper surface 112 of the housing 11). Therefore, the seat belt 200 is not normally rewound by the rewinding device 404 beyond the range of the adjusted length, so that the passenger 100 does not feel pressure on the chest, etc., from the seat belt 200, and the seat belt 200 does not get in the way when the passenger 100 makes a movement. Moreover, in the first mode, the elastic force of the rubber cord 13a acts in a direction along the upper surface 112 of the housing 11, so that the lever 12a is less likely to rotate by itself, and thus its malfunction can be prevented.

In addition, when the car suddenly stops, the seat belt 200 is pulled beyond the range of the adjusted length, but the tip of the lever 12a automatically detaches from the seat belt 200 inside the housing 11 by the pulling operation of the seat belt 200 (at this time, the second mode in which the lever 12a protrudes from the upper surface 112 of the housing 11 is entered). That is, when the lever 12a is rotated slightly by the pulling operation force of the seat belt 200, the tip 121 of the lever 12a then moves away from the seat belt 200 and the pulling operation force no longer works, but instead the elastic force of the rubber cord 13a works, so that the tip 121 of the lever 12a continues to rotate until it becomes approximately parallel to the seat belt 200, entering the second mode. That is, the reaction force of the pulling operation force and the elastic force work together to rotate the lever 12a on the housing 11 in the opposite direction to the rotation operation. Therefore, even if the seat belt 200 has been adjusted to be excessively long, when the vehicle suddenly stops, the seat belt 200 will exceed the length that was adjusted and will be retracted by the retractor 404. This ensures that the passenger 100 is securely fastened to the seat 405, and the original function of the seat belt 200 is not hindered.

When the passenger 100 wants to get out of the vehicle, he or she removes the metal fitting 401 of the seat belt 200 from the fastening device 402. At this time, the passenger 100 pulls the seat belt 200 slightly, causing the sling 300 attached to the upper surface 112 of the housing 11 of the seat belt fastener 1b to be pulled between the sling 403 and the seat belt fastener 1. As a result, the seat belt 200 and the housing 11 are pulled in opposite directions, and the tip 121 of the locked lever 12 is released from the seat belt 200 and returns to a substantially parallel state (at this time, the second mode is entered, in which the lever 12a protrudes from the upper surface 112 of the housing 11, for the same reason as above).

Then, the seat belt 200 is automatically wound up into the winding device 404 via the hanger 403 and returns to its initial state. As a result, the seat belt 200 remains long and does not hang down on the seat 405 or the vicinity thereof, and as a result, the seat belt 200 does not get in the way of getting on and off the seat, and it also does not get caught in a door (not shown) and prevent the door from opening and closing smoothly. It disappears.

In other words, the seat belt fastener 1b of this embodiment 2 can also be retrofitted to the seat belt 200, without interfering with the original function of the seat belt 200, and can prevent the seat belt 200 from tightening and release it with just a simple operation.

According to the seat belt fastener 1b of the second embodiment configured as described above, in addition to the effects of the first embodiment, the lever 12a hardly protrudes from the upper surface 112 of the housing 11 in the first mode. , even in the second mode, the number is smaller than in the first embodiment. Therefore, the seat belt fastener 1b can be significantly downsized, prevent the lever 12a from malfunctioning, and furthermore have the advantage of eliminating the risk of damaging the inside of the vehicle body with the lever 12a.

In the seat belt fastener 1 of the first embodiment, a different fastening location for the sling 300 is searched for when the box body 403a covering the sling 403 of the seat belt 200 is small. However, if no such location can be found, it is possible to fasten or tie the sling 300 to the sling 403 itself, as long as this does not affect the operation of the seat belt 200. If the box body 403a is large, the sling 300 can be fastened to the box body 403a as in the above-mentioned Patent Document 2.

Further, in the seat belt fastener 1b of the second embodiment, a rubber cord 13a is used as a rubber member in place of the spiral spring 13 in the first embodiment, but a rubber band may be used instead. Furthermore, a coil spring with a small diameter may be used. In this way, the selection range of elastic members can be expanded. The same applies to other members such as the housing 11 and the levers 12 and 12a.

In addition, in the seat belt fastener 1b of the above-mentioned second embodiment, if the elastic cord 13a breaks, the lever 12a may lower by itself and come into contact with the seat belt 200, which may make it difficult to store the seat belt 200. In this case, redundancy can be ensured by providing the elastic cords 13a symmetrically on the left and right.

Alternatively, the locking position of the other end of the sling 300 can be changed from the housing 12 to a suitable position of the operating end 122 of the lever 12a. In this case, the tip of the lever 12a is inserted into the seat belt 200 by rotating the lever 12a, and the tip 121 of the lever 12a can be automatically released from the seat belt 200 by rotating the lever 12a on the housing 12 in the opposite direction to the rotating operation using only the reaction force by pulling the seat belt 200. As a result, the elastic member including the rubber cord 13a is not necessary, resulting in an even simpler configuration.

Further, in both the seat belt fasteners 1 and 1b of the first and second embodiments, the seat belt 200 is inserted into the casing 11 through the slit 15 caused by the elastic deformation of the casing 11, and then the slit 15 is opened. Although the cut 15 is locked and closed, it may be secured with a screw or the like so that the cut 15 does not open.

The above-mentioned first and second embodiments may be combined and applied. Furthermore, while the above-mentioned first and second embodiments are both suitable for the seat belt fasteners 1, 1b of automobiles, the scope of application of the present invention is not limited thereto, and it is of course possible to apply the present invention to any vehicle in which the passenger needs to fasten the seat belt 200.

1, 1b seat belt fastener 11 housing 12, 12a lever 13 spring 13a rubber string (corresponding to rubber member)
14 Pivot shaft 15 Slit 111 Bottom surface 112 Top surface 113 Side surface 114 Upper side surface 115 Lower side surface 116 Side plate 117, 117a Square hole 118 Notch 121 Tip 122 Operation end 123 Bending portion 100 Passenger 200 Seat belt 250 Spacer 300, 300a, 300b Sling (corresponding to connecting member, first connecting member, second connecting member)
301 Loop 400 Pillar (corresponding to the body)
401 Metal fitting 402 Fixing device (corresponding to a fixing tool)
403 Hanging tool 403a Box body 404 Winding device 405 Sheet 460 Hook 461 Double-sided tape 462 Base 463 Hook body 470 Adjuster 471 Adjuster body 472 Anti-slip member

Japanese Utility Model Application Publication No. 2-21071 JP 2010-260535 A

Claims (6)

A seat belt fastener including a housing slidably attached to a seat belt that is pulled out from a retractor, folded back by a suspender, and fixed to a fastener, and a lever rotatably attached to the housing,
the housing is configured to be detachably attached to the seat belt through a slit generated by elastic deformation of the housing, and is attached to a vehicle body around the suspender through a connecting member;
the lever is elastically biased in a direction opposite to a rotation operation for causing a tip of the lever to bite into the seat belt, and the tip of the lever has an inclined surface which is inclined at an acute angle with respect to the seat belt when the tip is bitten into the seat belt and which is approximately parallel to the seat belt when the tip is released from the seat belt,
This seat belt fastener is characterized in that, when the lever is rotated, the tip of the lever is caused to bite into the seat belt, and when the seat belt is pulled, the reaction force of the pulling operation and the elastic spring force work together to rotate the lever on the housing in the opposite direction to the rotation operation, thereby automatically releasing the tip of the lever from the seat belt. The connecting member is attached to a hook attached to the vehicle body around the hanging device, and the tip of the hook is bent inside the hook so that the connecting member is difficult to remove. The seat belt fastener according to claim 1. 3. The seat belt fastener according to claim 1, wherein the lever includes a spring or a rubber member that elastically biases the lever in a direction opposite to the rotational operation. The seat belt according to claim 1 or 2, wherein the lever has a bent part in the middle in the longitudinal direction of the lever, and is formed in an L-shape with a rotation center around the bent part. Fastener. The operating side of the lever is formed so that it is substantially flush with the top surface of the casing when the tip of the lever bites into the seat belt placed on the bottom surface of the casing. The seat belt fastener according to claim 4, characterized in that: 3. The seat belt fastener according to claim 1 or 2, further comprising a spacer that is slidably attached to the seat belt between the sling and the housing, the spacer being configured to be detachably attached to the seat belt through a slit created by elastic deformation of the spacer, one end of the spacer being attached to the vehicle body around the sling via a first connecting member, and the other end of the spacer being attached to the housing via a second connecting member.

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