JP2005212605A - Belt reacher device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a belt reacher device capable of preventing clothes from being hooked or bitten. <P>SOLUTION: The belt reacher device 6 comprises an expansion/contraction arm 11 provided with a holding unit 10 to hold a webbing of a seat belt on a tip part 11b and expanding/contracting in the axial direction, and a driving unit 12 to drive the expansion/contraction arm 11, and the expansion/contraction arm 11 is connected to the driving unit 12 in a tiltable manner. The expansion/contraction arm 11 has a tilting gear 18 coaxially arranged with a connection point O to the driving unit 12 at its base end part, and the driving unit 12 has an arm driving gear 23 to connect the rotation of a motor 21 to the tilting gear 18. A non-engagement section is formed between the arm driving gear 23 and the tilting gear 18 of the expansion/contraction arm 11 by providing a non-tooth part 23a in the arm driving gear 23, and the non-engagement section is synchronized with the start of expansion of the expansion/contraction arm 11. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a belt reacher device for a vehicle or the like.

2. Description of the Related Art Conventionally, a belt reacher device that moves a webbing of a seat belt forward of a seat back at the time of wearing is known in order to improve seat belt wearing properties. For example, a conventional belt leecher device described in Patent Document 1 has a belt reacher with an arm that has a webbing holding portion at the tip and is pivotally supported so as to be pivotable in the front-rear direction of the seat with the rear end of the side surface of the seat cushion as a fulcrum. When the seat belt is mounted, the webbing holding portion is moved from the rear of the seat to the front of the seat back by rotating the arm. By adopting such a belt reacher device, the passenger can grasp the webbing without being forced to maintain the normal sitting posture, and easily attach the seat belt. Can do.
JP-A-4-159161

  However, the conventional belt leecher device employing the above-described rotating arm has a problem that the aesthetic appearance around the seat is impaired because the arm is always exposed on the side surface of the seat, and further, such an arm has a problem. There is a problem that a passenger's clothes or the like may be caught or pinched during rotation.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a belt reacher device capable of preventing clothes from being caught or caught.

  In order to solve the above problem, the invention according to claim 1 is a belt reacher device that includes a holding portion that holds a webbing of a seat belt, and moves the webbing further forward than a seat back. The gist includes an arm provided with the holding portion and configured to be extendable and a drive unit that extends and retracts the arm and tilts the arm in the front-rear direction.

The gist of the invention described in claim 2 is that the driving unit includes one driving source, and the arm extends and tilts with the driving source.
According to a third aspect of the present invention, the drive unit extends the arm along the side surface of the seat back for a predetermined time from the start of the extension of the arm, and then further extends and tilts the arm. The gist.

  According to a fourth aspect of the present invention, the arm includes a tilt gear that is coaxially disposed with a tilt center of the drive unit, and the drive unit includes a plurality of gears that transmit power of the drive source to the tilt gear. And an intermeshing section synchronized with the start of extension is formed between the tilting gear and each gear.

  According to a fifth aspect of the present invention, the arm is composed of a plurality of cylinders having different diameters arranged concentrically, and the cylinders accompanying the movement of a control cable connected to the cylinder of the innermost shell. The drive unit is engaged with the control cable and reciprocally moves the control cable by its rotation, and is coaxially arranged with the cable drive gear and the cable drive gear. And an input gear that rotates integrally.

(Function)
According to the first aspect of the present invention, when the seat belt is mounted, the arm is tilted with its extension to move the holding portion for holding the seat belt webbing forward from the seat back. When performing or leaving, the arm and the holding part are unlikely to interfere with the passenger. Therefore, the clothes are prevented from being caught or caught.

According to the second aspect of the present invention, since the arm is extended and tilted by one drive source, a compact configuration can be achieved, and as a result, the size can be reduced.
According to the third aspect of the present invention, the arm extends along the side surface of the seat back for a predetermined period from the start of the extension, and then further extends and tilts. Even after the seat is seated, the arm and the holding portion are unlikely to interfere with the occupant even when going out of the vehicle again before wearing the seat belt. Therefore, the clothes are prevented from being caught or caught.

  According to the fourth aspect of the present invention, the power of the drive source is not transmitted to the tilt gear for a predetermined period from the start of arm extension. Accordingly, when the seat belt is mounted, the arm extends along the side surface of the seat back without tilting for a predetermined time corresponding to the non-meshing section from the start of the stretching, and then the rotation of the motor is transmitted to the tilting gear. As a result, it tilts toward the front of the seat back.

  According to the fifth aspect of the invention, since the tilting mechanism and the telescopic mechanism are synchronized, the arm can be tilted in synchronization with the extension of the arm. In addition, since the power transmission path of the tilting mechanism is integrated with the power transmission path of the telescopic mechanism, a compact configuration can be achieved, and as a result, downsizing can be achieved.

  ADVANTAGE OF THE INVENTION According to this invention, the belt reacher apparatus which can prevent catching and pinching of clothes can be provided.

Hereinafter, an embodiment in which the present invention is embodied in a belt reacher device for a vehicle will be described with reference to the drawings.
As shown in FIG. 1, the seat 1 of the present embodiment moves a part of the webbing 4 from the side surface 5 a of the seat back 5 to the front side of the seat back 5 when the seat belt 3 is attached to the seat cushion side part 2. A belt reacher device 6 is provided.

  In the present embodiment, a lower anchor 7 to which the feeding end of the webbing 4 of the seat belt 3 is connected is provided in the vicinity of the rear end of the seat cushion side part 2, and the webbing 4 is provided at the rear end of the seat cushion side part 2. Is extended toward the upper part of the passenger compartment (upper side in the figure) along the side surface 5 a of the seat back 5. Then, the webbing 4 is hooked on the shoulder anchor 8 and folded downward in the passenger compartment, and its base end is wound around a retractor (not shown). The webbing 4 is on standby between the lower anchor 7 and the shoulder anchor 8 in a state where a predetermined tension is applied.

  As shown in FIGS. 2 and 3, the belt leecher device 6 includes a holding unit 10 that holds the webbing 4, an extendable arm 11 that is extendable along the axial direction, and a drive unit that drives the extendable arm 11. 12.

  In the present embodiment, the telescopic arm 11 is connected to the upper end of the casing 12 a of the drive unit 12 so as to be tiltable in the front-rear direction of the seat 1 (see FIG. 1, the left-right direction). It is provided at the tip 11a. The telescopic arm 11 is always urged toward the back of the seat 1 by a coil spring 13 and is normally held with its leading end portion 11a facing the longitudinal direction of the side surface 5a of the seat back 5. (See FIG. 1). And the holding | maintenance part 10 is arrange | positioned in the base end part vicinity of the seat back 5, and the tongue plate 14 is latched by the upper surface 10a.

  As shown in FIG. 1, the seat 1 of the present embodiment includes a cover-like shield 15 that covers the drive unit 12 together with a position adjustment mechanism (not shown) of the seat 1, and the telescopic arm 11 is Normally, it is accommodated in the shield 15. And the holding | maintenance part 10 is arrange | positioned so that the upper surface 10a may become flush | level with the outer surface of the shield 15. FIG.

  When the seat belt 3 is mounted, the belt reacher device 6 extends the telescopic arm 11 and tilts toward the front of the seat 1 with the connection point O with the drive unit 12 as the center of tilting, thereby holding the holding unit 10. The tongue plate 14 is moved forward with respect to the seat back 5 together with the webbing 4 held on the seat.

  As shown in FIGS. 2 and 3, in this embodiment, the telescopic arm 11 is composed of a plurality (four) of cylindrical bodies 16a to 16d having different diameters arranged concentrically, and the innermost shell. The cylinder 16a is connected with a control cable 17 (hereinafter simply referred to as a cable 17) that moves along the length direction by the drive unit 12. The telescopic arm 11 expands and contracts along the axial direction when the cylinders 16a to 16d are displaced relative to each other while being guided by the movement of the cable 17.

  Further, a tilting gear 18 is provided at the base end of the outermost cylindrical body 16d of the telescopic arm 11 so as to be coaxial with the connection point O with the drive unit 12, that is, the tilt center of the telescopic arm 11. In the present embodiment, the tilt gear 18 is formed in a fan shape. The telescopic arm 11 tilts along the front-rear direction with the connection point O as the center of tilting as the tilting gear 18 is driven and rotated by the drive unit 12.

  On the other hand, the drive unit 12 includes a motor 21 as a drive source, a cable drive gear 22 that moves the cable 17, and an arm drive gear 23 that is connected to the tilting gear 18 of the telescopic arm 11. The cable drive gear 22 is connected to an output shaft (not shown) of the motor 21 via a worm 24 and a wheel 25, and a part of the cable 17 is engaged with the cable drive gear 22.

  The cable 17 of the present embodiment has a known structure in which a wire is spirally wound around the outer periphery of the core wire, and the cable 17 is inserted into an insertion hole (not shown) formed in the casing 12a of the drive unit 12. By being inserted, the wire is engaged with the cable drive gear 22.

  The cable 17 reciprocates along the length of the cable drive gear 22 when the motor 21 rotates with the rotation of the motor 21, and the drive unit 12 reciprocates along the length of the cable 17. Stretch the. That is, in this embodiment, the cable 17 and the cable drive gear 22 constitute an expansion / contraction mechanism.

  The drive unit 12 includes an input gear 27 that is coaxially arranged with the cable drive gear 22 and rotates integrally with the cable drive gear 22. The input gear 27 is connected to the arm drive gear 23 via the reduction gear 28. It is connected. The drive unit 12 transmits the rotation (power) of the motor 21 to the tilting gear 18 of the telescopic arm 11 by the input gear 27, the reduction gear 28, and the arm driving gear 23, and drives the tilting gear 18. The telescopic arm 11 is tilted synchronously with the expansion and contraction in the axial direction. That is, in this embodiment, the arm drive gear 23, the input gear 27, and the reduction gear 28 constitute a tilting mechanism.

  Further, in the present embodiment, the arm drive gear 23 is provided with a toothless portion 23a, and the toothless portion 23a is a section where there is no meshing between the arm drive gear 23 and the tilting gear 18 of the telescopic arm 11 ( A non-meshing section) is formed. The rotation of the motor 21 is not transmitted to the tilt gear 18 for a predetermined period from the start of extension of the telescopic arm 11 by synchronizing this non-meshing section with the start of extension of the extendable arm 11.

  Therefore, as shown in FIG. 4, when the seat belt 3 is mounted, the telescopic arm 11 extends along the side surface 5a of the seat back 5 without tilting for a predetermined period corresponding to the non-meshing section from the start of the extension. To do. After that, the arm drive gear 23 and the tilting gear 18 of the telescopic arm 11 are engaged with each other, so that the arm driving gear 23 is tilted toward the front with the connection point O as the tilting center while extending.

  The belt reacher device 6 moves the holding portion 10 from the normal position P1 (see FIG. 1) near the base end portion of the seat back 5 to the mounting position P2 ahead of the seat back 5 by a series of operations of the telescopic arm 11. Move to. When the seat belt 3 is attached or a predetermined condition described later is satisfied, the telescopic arm 11 is contracted (or contracted and tilted) by rotating the motor 21 in the direction opposite to that when the telescopic arm 11 is expanded. The holding portion 10 is returned to the normal position P1.

  Here, when the holding portion 10 returns from the mounting position P2 to the normal position P1, the arm drive gear 23 and the tilting gear 18 of the telescopic arm 11 are in mesh with each other, and therefore the telescopic arm 11 is connected to the motor 21. Due to this reverse rotation, the vehicle contracts while tilting toward the seat back 5 with the connecting point O as the tilt center. The telescopic arm 11 continues to tilt until the arm driving gear 23 rotates and shifts to a non-meshing section where the arm driving gear 23 and the tilting gear 18 do not mesh with each other. After moving to the side surface 5a of the seat back 5, it contracts along the side surface 5a of the seat back 5 until the holding part 10 returns to the normal position P1.

Next, the electrical configuration of the belt reacher device of this embodiment will be described.
As shown in FIG. 5, the belt leecher device 6 of this embodiment includes a drive circuit 31 that supplies drive power to the motor 21 and an ECU 32 that controls the operation of the telescopic arm 11. The motor 21 is connected to the in-vehicle power supply 34 via the drive circuit 31, and the drive circuit 31 is connected to the ECU 32. The ECU 32 controls the operation of the motor 21, that is, the operation of the telescopic arm 11 by controlling the drive power supplied to the motor 21 by the drive circuit 31.

  Further, the belt reacher device 6 of the present embodiment includes a courtesy SW 35, a seating SW 36, a buckle SW 37, and a position sensor 38 for detecting the position of the holding unit 10, and these sensors are connected to the ECU 32. . The ECU 32 detects the opening / closing of the vehicle door (not shown), the seating of the passenger, the presence / absence of the seat belt 3 and the position of the holding unit 10 based on the signals input from these sensors. The operation of the telescopic arm 11 is controlled based on the detection result. In the present embodiment, the position sensor 38 is provided in the vicinity of the arm drive gear 23, and the ECU 32 detects the position of the holding unit 10 based on the rotational position of the arm drive gear 23.

Next, the control mode of the belt leecher device of this embodiment will be described.
As shown in FIG. 6, in this embodiment, the ECU 32 detects the seating of the passenger on the seat 1 by the seating SW 36 (step 101), and then detects the closing of the door by the courtesy SW 35 (step 102). For this, the motor 21 is operated to extend the telescopic arm 11 (step 103). If the seating and door closing are not detected in steps 101 and 102, the ECU 32 repeats steps 101 and 102.

  Next, when the telescopic arm 11 is extended by the rotation of the motor 21 and the holding unit 10 starts moving from the normal position P1 to the mounting position P2, the ECU 32 first determines whether the seating SW 36 is turned off, that is, the passenger. It is determined whether or not an absence has been detected (step 104). Next, when the ECU 32 determines in step 104 that the seating SW 36 is not turned off, the ECU 32 subsequently determines whether or not the courtesy SW 35 is turned on, that is, whether or not the door is opened (step 105). If it is determined in step 105 that the door is not open, it is further determined by the position sensor 38 whether or not the holding unit 10 has moved to the mounting position P2 (step 106).

  Then, the ECU 32 detects the above step until the seat SW 36 is turned off in the step 104, the door is opened (the courtesy SW 35 is turned on) in the step 105, or the movement of the holding unit 10 to the mounting position P2 is detected in the step 106. The processes 103 to 106 are repeated.

  When the ECU 32 detects the movement of the holding unit 10 to the mounting position P2 in step 106, the ECU 32 stops the extension of the telescopic arm 11 by stopping the rotation of the motor 21 (step 107).

  The ECU 32 detects that the seating switch 36 is turned off in step 104 or if the courtesy SW 35 is turned on in step 105, that is, before the holding unit 10 moves to the mounting position P <b> 2. When opening is detected, steps 112 to 114 described later are executed (see FIG. 7). Then, the telescopic arm 11 is contracted to return the holding unit 10 to the normal position P1.

  Next, when the telescopic arm 11 is stopped by the execution of step 107, that is, when the holding unit 10 is moved to the mounting position P2 and the telescopic arm 11 is stopped, the ECU 32 determines again whether or not the seating SW 36 is turned off (step). 108). If it is determined in step 108 that the seating SW 36 is not turned off, it is subsequently determined whether the courtesy SW 35 is turned on, that is, whether the door is opened (step 109).

  Next, when it is determined in step 109 that the door is not open, the ECU 32 subsequently determines whether or not the buckle SW 37 is turned on, that is, whether or not the seat belt 3 is detected (step 110). . If the attachment of the seat belt 3 is not detected in step 110, it is further determined whether or not a predetermined time has elapsed since the extension arm 11 is stopped (step 111).

  The ECU 32 detects that the seating switch 36 is turned off in step 108, the door is opened in step 109, or the seat belt 3 is worn in step 110, or until it is determined in step 111 that a predetermined time has elapsed. The processing from step 108 to step 111 is repeated.

  Then, the ECU 32 detects that the passenger has left the seat, the door is opened, or the seat belt 3 is attached, or when the predetermined time has elapsed, as shown in FIG. The telescopic arm 11 is contracted by rotating in the opposite direction (step 112).

  Then, the ECU 32 determines whether or not the holding unit 10 has returned to the normal position P1 by the position sensor 38 (step 113), and repeats the processes of steps 112 and 113 until the holding unit 10 returns to the normal position P1. . When the ECU 32 detects the return of the holding unit 10 to the normal position P1 in step 113, the ECU 32 stops the rotation of the motor 21 and stops the contraction of the telescopic arm 11 (step 114).

As described above, according to the present embodiment, the following features can be obtained.
(1) The belt reacher device 6 includes a holding unit 10 that holds the webbing 4, an extendable arm 11 that is extendable along the axial direction, and a drive unit 12 that drives the extendable arm 11. The holding part 10 is provided at the tip part 11a of the extendable arm 11, and the extendable arm 11 is connected to the drive part 12 so as to be tiltable. The telescopic arm 11 is provided with a tilting gear 18 coaxially arranged with a connection point O with the drive unit 12 at the base end, and the drive unit 12 is connected to the tilting gear 18 to rotate the motor 21. Is provided. Then, by providing the arm drive gear 23 with a toothless portion 23a, a non-meshing section is formed between the arm driving gear 23 and the tilting gear 18 of the telescopic arm 11, and the non-meshing section starts to extend the telescopic arm 11. Synchronize with.

  With such a configuration, the rotation of the motor 21 is not transmitted to the tilting gear 18 for a predetermined period from the start of expansion of the telescopic arm 11, so that when the seat belt 3 is attached, the telescopic arm 11 does not mesh from the start of expansion. It extends along the side surface 5a of the seat back 5 without tilting for a predetermined time corresponding to the section. After that, the arm driving gear 23 and the tilting gear 18 of the telescopic arm 11 are engaged with each other, so that the arm driving gear 23 is tilted forward with respect to the seat back 5 with the connection point O as the center of tilting.

  Therefore, even when the occupant sits and then goes out of the vehicle again before wearing the seat belt 3, the occupant's clothes and the like are prevented from being caught or caught between the telescopic arm 11 and the holding unit 10. be able to. Moreover, since the setting of the non-meshing section can be changed only by changing the gear ratio of each gear and the toothless portion 23a, the timing at which the seat back 5 tilts can be easily adjusted.

  (2) The telescopic arm 11 is composed of a plurality of cylindrical bodies 16a to 16d arranged concentrically and having different diameters. Each cylindrical body is moved along with the movement of the cable 17 connected to the innermost cylindrical body 16a. 16a-16d expands and contracts along the axial direction by being relatively displaced while guiding each other. The drive unit 12 is engaged with the cable 17, and is rotated coaxially with the cable drive gear 22 that reciprocates the cable 17 in the length direction by the rotation of the cable 17, and rotates together with the cable drive gear 22. The input gear 27 is connected to the arm drive gear 23 via a reduction gear 28.

  With this configuration, the rotation of the arm drive gear 23 that drives the tilting gear 18 of the extendable arm 11 can be synchronized with the rotation of the cable drive gear 22 that extends and retracts the extendable arm 11, and as a result, the extendable arm 11. Can be tilted forward in synchronization with expansion and contraction in the axial direction. Further, by integrating the power transmission path of the arm drive gear 23 with the power transmission path of the cable drive gear 22, the size can be reduced.

In addition, you may change each said embodiment as follows.
In the present embodiment, the non-meshing section is formed between the arm driving gear 23 and the tilt gear 18 by providing the arm driving gear 23 with the toothless portion 23a. However, the present invention is not limited to this, and the toothless portion may be provided in any of the input gear 27, the reduction gear 28, and the tilt gear 18. That is, the non-meshing section may be formed anywhere between the input gear 27 that transmits the rotation of the motor 21 and the tilt gear 18.

  In addition, by providing a sliding mechanism using a clutch or the like between the input gear 27 and the tilting gear 18 instead of the non-meshing section, the side surface 5a of the seat back 5 is extended for a predetermined time from the start of the extension. It is good also as a structure tilted ahead from the seat back 5 centering | focusing on the connection point O after that, and extending | stretching along.

-Furthermore, it is good also as a structure which makes the expansion-contraction arm 11 extend from the start of expansion | extension, and tilts.
In the present embodiment, the telescopic arm 11 is configured by a plurality of cylindrical bodies 16a to 16d arranged concentrically and having different diameters. However, the telescopic arm 11 may change its shape so that it can expand and contract in the axial direction. For example, you may use things other than a multistage expansion-contraction cylinder.

Next, technical ideas other than the claims that can be grasped from the above embodiments will be described together with the effects thereof.
(A) The belt reacher device according to claim 4, wherein the non-meshing section is formed by providing a toothless portion on an arm drive gear coupled to the tilt gear. . With such a configuration, the non-meshing section can be easily set, so that the synchronization between the expansion and contraction of the telescopic arm can be easily adjusted.

  (B) A vehicle seat provided with the belt reacher device according to any one of claims 1 to 5 and (a). With such a configuration, it is possible to provide a vehicle seat including a belt reacher device that can prevent clothes from being caught or caught.

The fragmentary sectional view of the vehicle seat. The schematic block diagram of the belt reacher apparatus of this embodiment. Similarly, the schematic block diagram of the belt reacher apparatus of this embodiment. Explanatory drawing which shows the effect | action of the belt reacher apparatus of this embodiment. The schematic block diagram which shows the electric constitution of the belt reacher apparatus of this embodiment. The flowchart which shows the control aspect of the belt reacher apparatus of this embodiment. The flowchart which shows the control aspect of the belt reacher apparatus of this embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Seat, 2 ... Seat cushion side part, 3 ... Seat belt, 4 ... Webbing, 5 ... Seat back, 5a ... Side surface, 6 ... Belt reacher device, 10 ... Holding part, 11 ... Telescopic arm, 11a ... Tip part, DESCRIPTION OF SYMBOLS 12 ... Drive part, 16a-16d ... Cylindrical body, 17 ... Control cable, 18 ... Tilt gear, 21 ... Motor, 22 ... Cable drive gear, 23 ... Arm drive gear, 23a ... Toothless part, 27 ... Input gear, 28 ... reduction gear, O ... connection point, P2 ... mounting position.

Claims (5)

A belt leecher device comprising a holding portion for holding a webbing of a seat belt, and moving the webbing forward from a seat back,
An arm provided with the holding portion at the tip and formed to be extendable;
A drive unit that expands and contracts the arm and tilts the arm in the front-rear direction;
A belt reacher device comprising: The belt leecher device according to claim 1,
The drive unit includes one drive source, and the arm extends and tilts with the drive source;
The belt reacher device characterized by this. In the belt leecher device according to claim 1 or 2,
The drive unit extends the arm along the side surface of the seat back for a predetermined period from the start of extension of the arm, and then further extends and tilts the arm;
The belt reacher device characterized by this. The belt reacher device according to claim 3,
The arm includes a tilting gear arranged coaxially with the tilting center of the drive unit,
The drive unit includes a plurality of gears that transmit power of the drive source to the tilt gear, and a non-meshing section synchronized with the start of extension is formed between the tilt gear and each gear, The belt reacher device characterized by this. In the belt leecher device according to any one of claims 1 to 4,
The arm is composed of a plurality of cylinders having different diameters arranged concentrically, and expands and contracts due to relative displacement of the cylinders accompanying movement of a control cable connected to the cylinder of the innermost shell,
The drive unit is engaged with the control cable, and a cable drive gear that reciprocates the control cable by rotation thereof;
An input gear arranged coaxially with the cable drive gear and rotating integrally with the cable drive gear.

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