Noise reduction retractor

Abstract

A noise-preventing retractor according to the present invention may include a case unit, a spool unit axially coupled to the case unit and on which a webbing is wound, a gear unit provided on one side of the spool unit and rotating together with the rotation of the spool unit, a locking unit that fixes the gear unit when a preset webbing withdrawal prevention condition is satisfied, and a noise-preventing unit that rotates together with the rotation of the gear unit when the webbing is wound and prevents vibration generated in the locking unit.

Description

Technology Field

[0001] The present invention relates to a retractor for a seat belt, and more specifically, to a noise-preventing retractor for preventing noise from a sensor. Background Technology

[0002] When a person is riding in a vehicle or device, various safety devices are provided to prevent the person from being ejected from the vehicle or device due to a collision between vehicles or with another object.

[0003] A representative example among these is the seat belt, which uses the seat belt to securely fasten the lower abdomen and chest of a person riding in the vehicle or device to the seat.

[0004] In addition, a retractor is widely used to secure the user's body by pulling the webbing with an appropriate winding force while the user is wearing such a seat belt, and to prevent the wound webbing from being pulled out again in specific situations such as an accident.

[0005] In addition, the above-mentioned retractor may have various functions such as an automatic locking retractor function, a block-out function, and an emergency locking retractor function.

[0006] The Automatic Locking Retractor (ALR) function mentioned above refers to a feature that automatically activates when the user extends the webbing to its full length, preventing further extension and allowing only retraction. This is achieved in cases such as when mounting a child seat in a vehicle or securing a device attached to a seat.

[0007] Furthermore, the aforementioned Block Out (B / O) function refers to a feature that disables the tilt sensor to forcibly release the locking mechanism, which prevents the webbing from being pulled out when the vehicle body is tilted beyond a certain angle. This function is intended to prevent the seat from being returned to its original position when a seat equipped with a retractor is folded and the locking mechanism is activated due to tilting beyond a certain angle.

[0008] Furthermore, the aforementioned Emergency Locking Retractor (ELR) function refers to a feature in which the retractor's locking mechanism prevents the webbing from coming loose in the event of an emergency, such as a vehicle impact or rollover.

[0009] However, since the components capable of implementing such automatic locking retractor functions, block-out functions, and emergency locking retractor functions are different from each other, it is very difficult to implement all of these functions on a single retractor.

[0010] However, with the development of technology, models that implement all these functions on a single retractor are being developed and implemented, but such conventional models cannot eliminate noise from the ball member that enters the locking mechanism, and there is a problem that the structure is very complex because the number of parts of the retractor increases significantly.

[0011] Furthermore, during product development by manufacturers, a problem has arisen where interference between the lever used to internally lock the locking unit and another adjacent lever may cause malfunctions. The problem to be solved

[0012] The present invention is an invention devised to solve the problems of the aforementioned prior art, and aims to provide a retractor including a noise prevention unit for removing noise from a ball member.

[0013] In addition, the purpose is to prevent component failures by eliminating interference between parts through changes in the internal structure.

[0014] The problems of the present invention are not limited to those mentioned above, and other unmentioned problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0015] A noise-preventing retractor of the present invention for achieving the above-mentioned purpose may include a case unit, a spool unit axially coupled to the case unit and on which a webbing is wound, a gear unit provided on one side of the spool unit and rotating together with the rotation of the spool unit, a locking unit that fixes the gear unit when a preset webbing withdrawal prevention condition is satisfied, and a noise-preventing unit that rotates together with the rotation of the gear unit when the webbing is wound and prevents vibration generated in the locking unit.

[0016] In addition, the noise prevention unit can prevent vibrations generated in the locking unit by rotating together with the rotation of the gear unit when the webbing is wound and applying pressure to the locking unit.

[0017] And the noise prevention unit may include a hold lever that is formed long toward the locking unit and has a first axis and is axially coupled to the case, rotates together with the gear unit in response to the rotation of the gear unit, and rotates to reciprocate along a preset section, while rotating to press the locking unit or to be separated from the locking unit.

[0018] In addition, the noise prevention unit may include an assist lever that is formed elongated and axially coupled to the case unit having a second axis, at least a portion of which is inserted into the gear unit and rotates in response to the rotation of the gear unit, and rotates toward the hold lever.

[0019] And the above gear unit has the above first axis and is axially coupled to the case unit and rotates together with the spool unit, and may include a control groove formed through the circumferential direction so that the assist lever is inserted.

[0020] In addition, the assist lever includes a projection member that protrudes to the side of the end contacting the hold lever and is inserted into the control groove, and the gear unit can rotate by engaging with the end of the control groove as it rotates.

[0021] And the above-mentioned hold lever may include a rotating member penetrating the first axis, an elastic member bent along the circumference of the rotating member, and a locking member extending long from the rotating member toward the locking unit.

[0022] In addition, the case unit may include a stopper that protrudes toward the hold lever and is positioned on both sides of the rotating member, and limits the radius of rotation of the hold lever. Effects of the invention

[0023] According to the present invention, as the gear unit rotates together with the rotation of the spool unit, a part of the noise prevention unit presses against the upper part of the locking unit in a certain section, thereby preventing noise from being generated in the locking unit including the ball member.

[0024] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description in the claims. Brief explanation of the drawing

[0025] FIG. 1 is a drawing for explaining the appearance of a noise-preventing retractor installed according to one embodiment of the present invention, and FIG. 2 is an assembled perspective view illustrating the overall configuration of a noise-preventing retractor according to one embodiment of the present invention, and FIG. 3 is a drawing for explaining the internal view of a noise-preventing retractor according to an embodiment of the present invention, and FIGS. 4 and 5 are drawings for explaining a noise prevention unit when it is not in contact with a locking unit in a noise prevention retractor according to an embodiment of the present invention, and FIGS. 6 and 7 are drawings for explaining a noise prevention unit when in contact with a locking unit in a noise prevention retractor according to an embodiment of the present invention, and FIG. 8 is a drawing for explaining the rotation radius of a control groove in a noise-preventing retractor according to an embodiment of the present invention, and FIGS. 9 to 11 are drawings for explaining the operation of the assist lever and the hold lever according to rotation in a noise-preventing retractor according to an embodiment of the present invention. Specific details for implementing the invention

[0026] Preferred embodiments of the present invention, in which the objectives of the present invention can be specifically realized, will be described below with reference to the attached drawings. In describing these embodiments, the same names and reference numerals are used for identical components, and additional explanations thereof will be omitted.

[0027] The configuration of the present invention may largely include a case unit (100), a spool unit (200), a gear unit (300), a locking unit (400), and a noise prevention unit (500).

[0028] The present invention will be explained in detail through the drawings.

[0029] FIG. 1 is a drawing for explaining the appearance of a noise-reducing retractor installed according to one embodiment of the present invention, and FIG. 2 is an assembled perspective view for explaining the overall configuration of a noise-reducing retractor according to one embodiment of the present invention.

[0030] FIG. 1 is a drawing showing the internal view of the retractor of the present invention. Inside the case unit (100), a gear unit (300) and a locking unit (400) can be seen.

[0031] In the present invention, the noise prevention unit (500) rotates together with the gear unit (300) in response to the rotation of the gear unit (300), and while rotating, it presses the locking unit (400) from the upper part of the locking unit (400) to limit the noise of the locking unit (400) caused by vibration.

[0032] I will explain the detailed configuration of the present invention through Figure 2.

[0033] First, a spool unit (200) can be axially coupled inside the case unit (100) and a webbing (not shown) can be wound. Then, a gear unit (300) is provided on one side of the spool unit (200) and can rotate together with the rotation of the spool unit (200). Thus, the gear unit (300) and the spool unit (200) can be coupled to the case unit (100) with coaxiality.

[0034] Meanwhile, the locking unit (400) is provided inside the case unit (100) and may be located below the gear unit (300). The locking unit (400) may include a ball sensor and a cover having a shape that surrounds the ball sensor from the top of the ball sensor.

[0035] Therefore, as the ball sensor moves, it comes into contact with the cover, which may generate noise.

[0036] At this time, a noise prevention unit (500) may be provided to limit the noise of the locking unit (400).

[0037] The noise prevention unit (500) rotates together with the rotation of the gear unit (300) when the webbing is wound up and then unwound to a certain length, thereby limiting the vibration generated in the locking unit (400).

[0038] Specifically, the noise prevention unit (500) can prevent vibrations generated in the locking unit (400) by rotating together with the rotation of the gear unit (300) when the webbing is wound, thereby pressing the locking unit (400).

[0039] A combined perspective view of the present invention for this purpose is shown in FIG. 2.

[0040] As illustrated in FIG. 2, the description follows the direction from left to right, including a spool unit (200), a gear unit (300), and a noise prevention unit (500) on the left, and a locking unit (400) can be accommodated inside the case unit (100) on the right at the bottom of the noise prevention unit (500).

[0041] The noise prevention unit (500) is formed to extend toward the locking unit (400) and is axially coupled to the case unit (100) with a first axis (501) and rotates together with the gear unit (300) in response to the rotation of the gear unit (300), and may include a hold lever (520) that rotates to reciprocate along a preset section, thereby pressing the locking unit (400) or rotating to be separated from the locking unit (400).

[0042] And the noise prevention unit (500) may further include an assist lever (540) which is formed long and has a second shaft (502) and is axially coupled to the case unit (100), with at least a portion inserted into the gear unit (300) and rotated in response to the rotation of the gear unit (300), and is configured to rotate toward the hold lever (520).

[0043] In the present invention, the noise prevention unit (500) includes a hold lever (520) and an assist lever (540). In the present invention, the hold lever (520) rotates in the same direction as the noise prevention unit (500) but is coupled to the case unit (100) on a different axis.

[0044] Specifically, the assist lever (540) is rotated by the gear unit (300) to provide a force that rotates the end of the hold lever (520), and at this time, the hold lever (520) may have a structure that comes into contact with the locking unit (400) as it rotates.

[0045] To explain in more detail, the gear unit (300) has a first shaft (501) and is axially coupled to the case unit (100) and rotates together with the spool unit (200), and may include a control groove (320) that penetrates along the circumferential direction so that an assist lever (540) is inserted.

[0046] Accordingly, a part of the assist lever (540) is inserted into the control groove (320) and the assist lever (540) is rotated by the control groove (320).

[0047] Here, the control groove (320) is formed to penetrate the circumferential direction of the circularly formed gear unit (300) and can be formed so that the two ends do not meet each other. In other words, it can be said that the groove is formed long and is formed along the circumferential direction of the gear unit (300) so that they do not meet each other.

[0048] This is to adjust the assist lever (540) to be in contact with or separated from the hold lever (520) by the radius of curvature of the control home (320).

[0049] The assist lever (540) may include a projection member (542) that protrudes from the side of the end contacting the hold lever (520) and is inserted into the control groove (320). The diameter of the projection member (542) corresponds to the width of the control groove (320) and is preferably formed to be a predetermined short length so that it moves along the control groove (320) without wobbling.

[0050] I will explain this in more detail through Figure 3.

[0051] FIG. 3 is a drawing showing the interior of a noise-preventing retractor according to one embodiment of the present invention.

[0052] As described above, the gear unit (300) axially coupled to the case unit (100) may include a gear plate (340) and a gear center (360). In addition, the aforementioned control groove (320) is formed in the gear plate (340) along the circumferential direction so that the two ends do not meet.

[0053] Here, the gear unit (300) rotates together with the gear plate (340), and the hold lever (520) is coupled to the gear center (360) so that the rotational force of the spool unit (200) can be transmitted to the hold lever (520) through the gear center (360).

[0054] The hold lever (520) is combined in a shape that wraps around the circumference of the gear center (360), but can be formed in a shape that wraps only a part of the circumference.

[0055] Specifically, the hold lever (520) may include a rotating member (522) formed to surround the circumference of a gear center (360) that protrudes from the gear plate (340) toward the case, an elastic member (524) that is bent along the circumference of the rotating member (522) to connect the gear center (360) and the rotating member (522), and a locking member (526) that extends long from the rotating member (522) toward the locking unit (400).

[0056] Here, the elastic member (524) is connected along the circumference of the rotating member (522) and may have a shape in which both ends are bent toward the sides.

[0057] And a fixed member (525) protruding along the longitudinal direction of the gear unit (300) from the rotating member (522) can restrain both bent ends of the elastic member (524).

[0058] Here, the fixed member (525) is formed to protrude around the perimeter of the hold lever (520), and can prevent the elastic member (524) from detaching from the rotating member (522) as it rotates.

[0059] And the two ends of a pair of fixed members (525) and elastic members (524) are provided so as not to come into contact with each other, and can have a shape that rotates at a predetermined interval and is caught according to the rotation of the gear unit (300).

[0060] This may be intended to prevent simultaneous response to the rotational force of the gear unit (300) and to allow for a time difference of a predetermined distance.

[0061] Meanwhile, a pair of stoppers (120) are formed protruding along the longitudinal direction of the gear center (360) in the case unit (100), and as the rotation of both ends of the elastic member (524) is restricted by the stoppers (120), the rotation of the hold lever (520) is also restricted.

[0062] At this time, both ends of the elastic member (524) are formed to be able to contact at least one of the pair of stoppers (120), so that when the hold lever (520) is rotated to the left, it is rotated at a predetermined angle and then contacts the stopper (120) formed on the left of the pair of stoppers (120), and when the hold lever (520) is rotated to the right, it is rotated at a predetermined angle and then contacts the stopper (120) formed on the right of the pair of stoppers (120), thereby restricting rotation.

[0063] Through this, the hold lever (520) can reciprocate along a pre-set section by the stopper (120).

[0064] Accordingly, when the gear unit (300) rotates clockwise, the hold lever (520) rotates together with the gear unit (300) and rotates for a predetermined distance, after which the fixed member (525) is caught on the end of the elastic member (524). Additionally, when the gear unit (300) rotates, the fixed member (525) is caught on the end of the elastic member (524) and rotates for a predetermined distance further, after which the rotation of the hold lever (520) is restricted by the stopper (120).

[0065] Meanwhile, the assist lever (540) rotates together with the hold lever (520) so as not to interfere with the rotation of the hold lever (520) according to the purpose of the present invention. Since there is a problem of interference with the rotation of the hold lever (520) in the past, the shape of the assist lever (540) is changed, and the condition under which the assist lever (540) can rotate is limited to the control groove (320), so that it rotates along the control groove (320) and does not come into contact with the hold lever (520).

[0066] Additionally, the assist lever (540) is spaced apart from the hold lever (520) as it is caught at the end of the control home (320), and in the section where the assist lever (540) is not caught at the end of the control home (320), it can come into contact with the hold lever (520) along the radius of curvature of the control home (320).

[0067] The configuration and combination of the present invention have been described above, and the operation will be explained through FIGS. 4 to 7.

[0068] FIGS. 4 and 5 are drawings for explaining a noise prevention unit (500) when it is not in contact with a locking unit (400) in a noise prevention retractor according to an embodiment of the present invention, and FIGS. 6 and 7 are drawings for explaining a noise prevention unit (500) when it is in contact with a locking unit (400) in a noise prevention retractor according to an embodiment of the present invention.

[0069] As illustrated, when the spool unit (200) and the gear unit (300) rotate together, the hold lever (520) connected to the gear unit (300) rotates together. As illustrated, when rotated counterclockwise, the hold lever (520) moves in the same counterclockwise direction and may become separated from the locking unit (400).

[0070] At this time, the rotation of the hold lever (520) is restricted by the stopper (120) positioned on the right side, and additionally, even if the gear unit (300) rotates, the elastic member (524) and the stopper (120) can restrict the rotation of the hold lever (520).

[0071] Conversely, when the spool unit (200) and the gear unit (300) rotate together in a clockwise direction, the hold lever (520) also rotates together, and although rotation is restricted by the stopper (120) on the left, the locking member (526) contacts the locking unit (400) to prevent noise generated from the locking unit (400).

[0072] At this time, the assist lever (540) moves along the control home (320) and may come into contact with or be separated from the hold lever (520).

[0073] Further details will be explained through Figures 8 to 11.

[0074] FIG. 8 is a drawing for explaining the rotation radius of the control home (320) in a noise-preventing retractor according to one embodiment of the present invention.

[0075] As described above, the control groove (320) has the shape of a curved groove with curvature in the planar direction on the gear plate (340). In addition, in the present invention, the control groove (320) can be formed with different radii of curvature depending on the section.

[0076] Specifically, the path from C to B has a constant radius of curvature, while the path from B to A has a shape in which the radius of curvature gradually increases.

[0077] A virtual circle (O) is shown at the center of the control home (320). As illustrated, it can be seen that the radius of curvature of the part adjacent to A gradually increases along the path from B to A.

[0078] Through this, the assist lever (540), in which the protruding member (542) is inserted into the control home (320), can be rotated clockwise.

[0079] The movement of the assist lever (540) along the control home (320) will be explained in FIGS. 9 to 11.

[0080] FIGS. 9 to 11 are drawings for explaining the operation of the assist lever (540) and the hold lever (520) according to rotation in a noise-preventing retractor according to one embodiment of the present invention.

[0081] First, in FIG. 9, the webbing is in a fully wound state. At this time, the gear unit (300) connected to the spool unit (200) has a control groove (320) arranged in the shape shown, and a protrusion member (542) is arranged in C of the control groove (320).

[0082] And the assist lever (540) is in contact with the hold lever (520) corresponding to the shape of the control home (320), and the hold lever (520) is in contact with the locking unit (400) so as to block noise generated from the locking unit (400).

[0083] Figure 10 below is a diagram illustrating the case when the webbing is being withdrawn.

[0084] As described, the gear unit (300) rotates clockwise in the drawing, and at this time, the protrusion member (542) is placed in the path from C to B of the control home (320), and since the path from C to B has a constant curvature, the position of the assist lever (540) does not change.

[0085] Since the position of the assist lever (540) is in contact with the hold lever (520) and there is no change in position, noise can also be blocked in the locking unit (400).

[0086] In Fig. 11, the assist lever (540) can move along the path from B to A.

[0087] In FIG. 11, the webbing is fully unwound, and the projection member (542) is located at end A of the control groove (320).

[0088] The assist lever (540) can be separated from the hold lever (520) along the radius of curvature of the control home (320), and the hold lever (520) can also be separated from the locking unit (400).

[0089] As described above, preferred embodiments according to the present invention have been examined. It is obvious to those skilled in the art that, in addition to the embodiments described above, the present invention may be embodied in other specific forms without departing from the spirit or scope thereof. Therefore, the embodiments described above should be regarded as illustrative rather than restrictive, and accordingly, the present invention is not limited to the description above but may be modified within the scope of the appended claims and their equivalents. Explanation of the symbols

[0090] Case Unit: 100 Stopper: 120 Spool Unit: 200 Gear Unit: 300 Control Home: 320 Gear Plate: 340 Gear Center: 360 Locking Unit: 400 Noise Reduction Unit: 500 Axis 1: 501 Hold Lever: 520 Rotating member: 522 Elastic member: 524 Fixing member: 525 Catching member: 526 2nd Axis: 502 Assist Rever: 540 Projection member: 542

Claims

Claim 1 A case unit; a spool unit axially coupled to the case unit and on which a webbing is wound; a gear unit provided on one side of the spool unit and rotating together with the rotation of the spool unit; a locking unit that fixes the gear unit when a preset webbing withdrawal prevention condition is satisfied; and a noise prevention unit that rotates together with the rotation of the gear unit when the webbing is wound and prevents vibrations generated in the locking unit; wherein the noise prevention unit prevents vibrations generated in the locking unit by pressing the locking unit while rotating together with the rotation of the gear unit when the webbing is wound, and a hold lever that is formed long toward the locking unit, axially coupled to the case unit having a first axis, rotates together with the gear unit in response to the rotation of the gear unit, and rotates to reciprocate over a preset section, and rotates to press the locking unit or rotate to be separated from the locking unit; A noise-reducing retractor comprising: an assist lever that is formed to be elongated and axially coupled to the case unit having a second axis, and at least a portion of which is inserted into the gear unit and rotated in response to the rotation of the gear unit, and is provided to be rotatable toward the hold lever. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 A noise-reducing retractor according to claim 1, wherein the gear unit has the first shaft and is axially coupled to the case unit and rotates together with the spool unit, and includes a control groove formed through the circumferential direction to allow the assist lever to be inserted. Claim 6 A noise-preventing retractor according to claim 5, wherein the assist lever includes a projection member that protrudes to the side of the end contacting the hold lever and is inserted into the control groove, and the gear unit rotates by engaging with the end of the control groove. Claim 7 A noise-reducing retractor according to claim 1, wherein the hold lever comprises: a rotating member coupled to the gear unit and rotating together with the gear unit; an elastic member bent along the circumference of the rotating member to transmit power of the gear unit; and a locking member extending from the rotating member toward the locking unit. Claim 8 A noise-reducing retractor according to claim 7, wherein the case unit protrudes toward the hold lever and is disposed on both sides of the rotating member, and includes a stopper that limits the radius of rotation of the hold lever.

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