JP2020192875A - Restraining belt adjusting for child seat device - Google Patents

Abstract

To provide a mechanism that adjusts a length of a belt restraining the body of a child and that has a more improved structure than before.SOLUTION: A restraining belt adjusting for child seat device comprises: a roller 23 which is pivoted to rotate to take up and pay off an adjustment belt 22; a lock mechanism 30 which has a lock operator 32, and inhibits the adjustment belt 22 from being taken up and/or paid off with the lock operator not operated and also allows the adjustment belt 22 to be taken up and/or paid off with the lock operator operated; a drive part 40 which outputs take-up torque; an adjustment dial 24 which is manually operable; and a torque transmission part 50 which transmits take-up torque from the drive part to the roller to take up the adjustment belt around the roller and allows the roller to rotate together with the adjustment dial while the adjustment dial 24 is operated to rotate.SELECTED DRAWING: Figure 1

Description

The present invention relates to a child seating device.

Regarding a so-called child seat, which is also called a child seat device, an infant safety seat, an infant restraint protective sheet, or a child care device, Patent Document 1 and Patent Document 1 and Patent as a structure for adjusting the belt length of a shoulder belt that restrains a child's shoulder. The technique described in Document 2 is known.

The infant restraint protective sheet described in Patent Document 1 has a length adjusting belt that is connected to a pair of left and right shoulder belts, and a hollow that is provided below the seating surface on which the infant sits and is provided in the center in the left-right direction to wind up the adjusting belt. A take-up shaft, a ratchet provided on the hollow take-up shaft to prevent rotation in the direction opposite to the take-up direction, a cylindrical rotary knob provided on the left side of the seat, and a circular hole at the center of the rotary knob. It is provided with a rotary knob to be used, and a belt take-up shaft extending in the left-right direction to connect a hollow take-up shaft, a rotary knob, and a rotary knob.

The operator can shorten the belt length of the shoulder belt by manually operating the rotary knob and the rotary knob, and can lengthen the belt length of the shoulder belt by releasing the ratchet. .. In this way, the belt length adjustment of Patent Document 1 is performed entirely manually.

The childcare device described in Patent Document 2 has a length adjusting belt that is connected to a pair of left and right shoulder belts, and a fixing that is provided below the seating surface on which the infant sits and in the center in the left-right direction to lock or unlock the adjusting belt. Has a member. The tip of the adjusting belt passes through the fixing member and extends forward of the seating surface on which the infant sits.

The operator can shorten the belt length of the shoulder belt by manually pulling the tip of the adjustment belt, and can lengthen the belt length of the shoulder belt by unlocking the fixing member. is there. The fixing member allows the tip of the adjusting belt to be further pulled forward, but restricts movement in the opposite direction. This prevents the shoulder belt from being inadvertently lengthened. In this way, the belt length adjustment of Patent Document 2 is performed entirely manually.

The child seat described in Patent Document 3 includes a length adjusting belt that is connected to a pair of left and right shoulder belts, an adjuster provided below the seating surface on which the infant sits, and an automatic winder. The adjuster allows the operator to manually pull the adjustment belt forward to shorten the belt length of the shoulder belt, but the adjustment belt passes through the adjuster and moves backward to increase the belt length of the shoulder belt. In principle, it is prohibited. In this way, the belt length adjustment of Patent Document 3 is performed entirely manually.

The automatic winder of Patent Document 3 merely winds the extra adjustment belt that has passed through the adjuster and is pulled forward. Therefore, the automatic winder of Patent Document 3 does not apply torque to the adjustment of shortening or tightening the shoulder belt.

Japanese Unexamined Patent Publication No. 7-323816 Japanese Unexamined Patent Publication No. 2003-226178 Japanese Patent No. 4672170

The present inventor has found that there are points to be improved in the above-mentioned conventional structure. That is, it is preferable to reduce the work load of pulling out and winding the adjusting belt completely manually for the operator who is the guardian of the infant.

Therefore, it is conceivable to add an electric / mechanical drive source such as an electric motor or a spring element, but the device for winding the adjustment belt is simply automated, and the adjustment belt is installed with the automatic winding device without relying on manual force. When winding, it cannot meet the demand for fine adjustment of the belt length and the demand for retightening. For example, when the adjusting belt is wound by a spring-loaded retractor, the winding may be insufficient and the restraining belt such as the shoulder belt may not be adjusted to an appropriate length.

In the unlikely event that an automatic winding device such as a spring mechanism or an electric motor malfunctions, the belt length itself cannot be adjusted at all, causing inconvenience.

An object of the present invention is to provide a structure for adjusting the belt length, which is improved as compared with the conventional case, in view of the above circumstances.

For this purpose, the restraint belt adjusting mechanism for a child seat device according to the present invention has a structure provided in the child seat device to adjust the belt length of the restraint belt that restrains the child's body, and is connected to the restraint belt. The adjustment belt, the roller that is rotatably supported by the shaft and winds up and unwinds the adjustment belt, and the lock operator that prohibits the winding and / or unwinding of the adjustment belt when the lock operator is not operated. A lock mechanism that allows the adjustment belt to be wound and / or unwound while the operator is operated, a drive unit that outputs the winding torque, a manually operable adjustment operator, and winding from the drive unit to the roller. A torque transmission unit that transmits the take-up torque to wind the adjustment belt around the roller and allows the roller to rotate in response to the operation of the adjustment operator regardless of the take-up torque while the adjustment operator is operated. To be equipped with.

According to the present invention, the adjustment belt is mechanically wound around the roller by the winding torque of the drive unit while the adjustment operator is not manually operated, and the operator of the child seat device manually adjusts the adjustment operator. By rotating with, the adjustment belt can be further wound up or unwound. Therefore, fine adjustments such as loosening the belt of the restraint belt regardless of the drive unit and tightening the restraint belt when the winding torque of the drive unit is insufficient can be performed. Further, even when the drive unit does not output the take-up torque or does not rotate, the operator of the child seat device can adjust the length of the restraint belt fully manually. The adjustment operator is not particularly limited, and is, for example, a dial coaxially coupled to the roller. The belt is flexible and transmits tension and torque.

The roller of the present invention can be rotated for adjustment by the adjustment operator even when the drive unit is stopped. The drive unit may be a spring element or an electric motor. The adjustment operator may be integrated with the roller, or may be separate from the roller and transmit the movement of the adjustment operator to the roller by a gear, a wire, or the like. As one aspect of the present invention, the torque transmission unit includes a drive drum driven by the drive unit, a driven drum for driving the rollers, and a end connected to the drive drum and a tip connected to the driven drum. It has a retractor belt that can be wound up and unwound between them. According to this aspect, the torque transmission unit is composed of two axes, a drive drum on the drive unit side and a driven drum on the roller side, and the two axes separated from each other are connected by a retractor belt. Therefore, the roller can be rotated even when the rotation of the drive unit is stopped. In the normal state, the retractor belt applies tension between the two axes of the drive drum and the driven drum, and transmits torque between the two axes. The spring element is a metal spring such as a mainspring.

As another aspect of the present invention, the torque transmission unit includes an input member driven by the drive unit and an output member that drives the rollers, and transmits a winding torque of a predetermined value or less from the input member to the output member. , A torque limiter that does not transmit winding torque exceeding a predetermined value. According to this aspect, the drive unit and the roller can be arranged coaxially, which contributes to the miniaturization of the restraint belt adjusting mechanism.

Alternatively, as another aspect of the present invention, the torque transmission unit has a central member connected to a spring element of the drive unit to transmit the winding torque to the roller, and the central member is wound while the adjustment operator is operated. It is allowed to rotate according to the operation of the adjustment operator regardless of the torque.

According to this aspect, the adjustment belt is mechanically wound around the roller by the winding torque of the spring element while the adjustment operator is not manually operated, and the operator of the child seat device manually adjusts the adjustment operator. By rotating, the spring element is elastically deformed, and the adjusting belt can be further wound or unwound. Therefore, fine adjustments such as loosening the restraint belt regardless of the take-up torque output by the spring element and retightening the restraint belt when the take-up torque of the spring element is insufficient can be performed. Further, even when the spring element does not output the take-up torque or does not rotate, the operator of the child seat device can adjust the length of the restraint belt fully manually.

The restraint belt adjusting mechanism of the present invention is not limited in the arrangement place. Further, the roller and the adjustment operator of the present invention are not limited in the arrangement place. As one aspect of the present invention, the width direction position of the roller and the width direction position of the adjustment operator are different with respect to the width direction of the child seat device. For example, a roller is arranged at the center of the child seat device in the width direction, and adjustment controls are arranged at the left and right edges of the child seat device. The width direction refers to the left-right direction of the infant seated in the child seating device. As another aspect of the present invention, the width direction position of the roller and the width direction position of the adjustment operator overlap. For example, a roller is arranged in the front portion of the central portion in the width direction of the child seat device, and an adjustment operator is arranged in the rear portion of the central portion in the width direction. Alternatively, the rollers and the adjustment operator are arranged upside down.

The child seating device may naturally include a seating surface that supports the buttocks of the infant, and may further include a backrest that supports the back of the infant. As one aspect of the present invention, the restraint belt adjusting mechanism is embedded in the front region of the seat surface portion of the child seat device. This makes the restraint belt adjustment mechanism inconspicuous so that it is located below the seating surface of the child seating device. As another aspect of the present invention, the restraint belt adjusting mechanism may be embedded in the rear region of the seating surface of the child seating device or in the backrest of the child seating device.

The lock mechanism of the present invention operates to lock in a normal state to prohibit the adjustment belt from being extended, but it is preferable that the lock mechanism is unlocked only while the lock operator is operated to allow the adjustment belt to be wound. As one aspect of the present invention, the lock mechanism is provided on the base facing the adjustment belt and on the side opposite to the base when viewed from the adjustment belt, and the adjustment belt is pressed and fixed toward the base without operating the lock operator. It has a stopper that separates from the base when the lock operator is operated. As a preferred aspect of the present invention, the lock operator is arranged in the vicinity of the adjustment operator. As a result, the operator can operate the lock operator and the adjustment operator at the same time with one hand. It is preferable that the lock operator is arranged away from the adjustment operator and the distance from the lock operator to the adjustment operator is 10 cm or less. As a result, the operator can operate the adjustment operator with the thumb, for example, and simultaneously operate the lock operator with the remaining four fingers. Another member may be interposed between the lock operator and the adjustment operator. Alternatively, the lock operator may be arranged adjacent to the adjustment operator.

As described above, according to the present invention, the drawbacks of the automatic winding device can be compensated for, and the length of the restraint belt can be adjusted appropriately. Moreover, even if the automatic winding device is malfunctioning, the length of the restraint belt can be adjusted fully manually.

It is a figure which shows the child seat of this invention and the restraint belt adjustment mechanism which becomes 1st Embodiment of this invention. It is a figure which shows the state which the lock mechanism of 1st Embodiment was seen from the lateral direction. It is a figure which shows the 2nd Embodiment of this invention. It is a figure which shows the torque limiter taken out from the 2nd Embodiment. It is a figure which shows the 3rd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1A is a schematic side view showing a child seat according to an embodiment of the present invention. First, to give a brief description of a child seat, the child seat is a child seat device that is placed on the seat of an automobile and allows children such as babies and toddlers to ride safely. The child seat includes a base body 10 and a seat body 11. The base body 10 is placed on a seat (not shown) of a passenger car, fixed on the seat by a seat belt (not shown) provided in the passenger car, and supports the seat body 11 from below. The seat body 11 is attached to the upper side of the base body 10 and is rotatably supported with respect to the base body 10.

A child sits on the seat body 11. For this reason, the seat body 11 is also called a child's seat, and has a seat surface portion 12 that supports the buttocks of the child and a backrest portion 13 that stands up from behind the seat surface portion 12 and supports the back of the child. Further, a covering member (not shown) for the seat surface portion 12 is detachably attached to the frame of the seat surface portion 12. A covering member (not shown) for the backrest portion 13 is detachably attached to the frame of the backrest portion 13. These covering members are formed of a soft cloth member, for example, a cushion material or a mesh material.

The backrest portion 13 is provided with a slide member 14 that overlaps with the backrest portion 13 and is slidable in the vertical direction. The slide member 14 includes a headrest 15 that supports the child's head, and can be fixed at an arbitrary height position by a locking mechanism (not shown).

The child seat is provided with a plurality of restraint belts for restraining the child's body. The restraint belt provided on the backrest portion 13 includes a pair of shoulder belts 16 that restrain both shoulders of the child. The shoulder belt 16 is arranged so as to penetrate the slide member 14 and the backrest portion 13. One end of the shoulder belt 16 is connected to the adjusting belt 22 of the restraint belt adjusting mechanism 20 via the connecting tool 21 on the rear surface side of the backrest portion 13. The intermediate region and the other end of the shoulder belt 16 are arranged on the front surface side of the backrest portion 13.

Further, the restraint belt provided on the seat surface portion 12 is a crotch belt 17 extending between both thighs of the child seated on the seat body 11 and extending so as to cross the seat body 11 in the left-right direction to restrain the child's waist. Includes a waist belt 18 and One end of the crotch belt 17 is fixed to the central portion of the seat surface portion 12 in the width direction. The waist belts 18 are arranged on the left and right sides to form a pair, and one end of each waist belt 18 is fixed to both side portions in the width direction of the seat surface portion 12.

The other ends of these restraint belts (shoulder belt 16, crotch belt 17, waist belt 18) are connected to each other near the abdomen of the child by a connecting device 19 provided at the tip of the crotch belt 17. Further, when the operator operates the connecting device 19, the other ends of the restraint belts are separated from each other. The coupling device 19 is, for example, a buckle.

Next, the restraint belt adjusting mechanism 20 for adjusting the length of the shoulder belt 16 will be described.

As shown in FIG. 1A, the restraint belt adjusting mechanism 20 is arranged in the front region of the seat surface portion 12 and is embedded below the seat surface. The adjusting belt 22 extends rearward from the restraint belt adjusting mechanism 20 and is fixed to the connector 21 at the tip. Further, the restraint belt adjusting mechanism 20 is arranged at the central portion in the width direction of the seat surface portion 12.

FIG. 1B is a perspective view showing the restraint belt adjusting mechanism 20 according to the first embodiment of the present invention, and the seat front F is represented by an arrow. FIG. 1C is a perspective view showing the restraint belt adjusting mechanism 20 according to the same embodiment, and a part thereof is shown in cross section in order to easily understand the internal structure. The restraint belt adjusting mechanism 20 includes an adjusting belt 22, a roller 23 for winding and unwinding the adjusting belt 22, and a locking mechanism 30 for prohibiting or allowing winding and / or unwinding of the adjusting belt. A drive unit 40 that outputs torque and a torque transmission unit 50 that transmits winding torque from the drive unit 40 to the roller 23 are provided.

The operator of the child seat operates the restraint belt adjusting mechanism 20 to shorten the pair of shoulder belts 16 by winding the adjusting belt 22 or lengthen the pair of shoulder belts 16 by extending the adjusting belt 22. The length of the shoulder belt 16 can be adjusted. Further, except in the case of the above-mentioned adjustment operation, the adjustment belt 22 is not carelessly extended from the restraint belt adjustment mechanism 20, and the shoulder belt 16 is made constant in length to restrain the child's shoulder.

As shown in FIG. 1C, the adjusting belt 22 is passed through the lock mechanism 30 on the terminal side. The end of the adjusting belt 22 is inserted into a groove 23g formed in the core of the roller 23, whereby the end of the adjusting belt 22 is connected and fixed to the roller 23. The adjusting belt 22 is wound around the outer circumference of the roller 23 as the roller 23 rotates.

As shown in FIG. 1B, adjustment dials 24 are provided at both ends of the roller 23. The adjustment dial 24 is provided with a knurl on the outer peripheral surface so that it can be easily operated manually, and rotates together with the roller 23. Bearings 25c are further provided at both ends of the roller 23. Each bearing 25c is provided axially outward of the adjustment dial 24 and is rotatably supported by a pair of support walls 25. The roller 23 and the adjustment dial 24 are integrally connected to form a single member. A shaft 23b (FIG. 1 (c)) is passed through the center of the member and the pair of bearings 25c described above. The shaft 23b is supported by the pair of bearings 25c described above.

A pair of support walls 25, 25 extend along the adjusting belt 22. In the following description, the direction of the support wall 25 extending along the adjusting belt 22 is referred to as the longitudinal direction. Further, the direction in which the adjustment belt 22 is crossed in the width direction is referred to as a lateral direction. Between the pair of support walls 25, 25, a movable part of the lock mechanism 30, a roller 23, an adjustment dial 24, and an end region of the adjustment belt 22 are arranged.

The adjustment dial 24 is a flange having a diameter larger than that of the roller 23, and forms a pair with the roller 23 interposed therebetween. With such a pair of flanges, the adjustment belt 22 is neatly wound between the adjustment dials 24 and 24.

A drive unit 40 is installed on the side of the lock mechanism 30, and a torque transmission unit 50 is installed on one side of the roller 23 in the axial direction. The drive unit 40 and the torque transmission unit 50 are arranged by a single support wall 25 so as to be separated from the movable parts of the lock mechanism 30 and the rollers 23. The lock mechanism 30 will be described later.

The drive unit 40 is a cylindrical body that accommodates a metal spring such as a mainspring, and constantly drives a drive shaft 41 (shown by a broken line in FIG. 1B) extending from the drive unit 40 in the winding direction. However, the drive shaft 41 only outputs the take-up torque, the rotation speed is not specified, and the rotation can be stopped. The drive shaft 41 is supported by brackets 42 at both ends. The bracket 42 further supports the drive unit 40.

The torque transmission unit 50 includes a retractor belt 51, a drive drum 52, and a driven drum 53. The drive drum 52 is mounted and fixed on the outer circumference of the drive shaft 41. The driven drum 53 is arranged parallel to the drive drum and is attached and fixed to the roller 23. The retractor belt 51 is a flexible cloth band similar to the adjusting belt 22 and the restraint belt described above. The retractor belt 51 is fixed to the drive drum 52 at the end, fixed to the driven drum 53 at the tip, and is wound around the remaining drive drum 52 while being unwound from either the drive drum 52 or the driven drum 53. As a result, the torque transmission unit 50 transmits the winding torque of the drive shaft 41 to the roller 23.

The drive drum 52 and the driven drum 53 usually rotate at substantially the same rotation speed, but the drive shaft 41 may not rotate or may rotate slowly for some reason. In this case, the drive drum 52 does not rotate smoothly, but the roller 23 and the driven drum 53 can be rotated by the operator manually turning the adjustment dial 24. Specifically, the driven drum 53 can rotate in the direction opposite to the winding torque direction of the drive drum 52. As a result, the operator can manually rotate the adjustment dial 24 to extend the adjustment belt 22 from the roller 23 and loosen the shoulder belt 16 regardless of the winding torque of the drive unit 40. Alternatively, the operator can manually rotate the adjustment dial 24 to further wind the adjustment belt 22 with the roller 23 and retighten the shoulder belt 16 regardless of the magnitude of the winding torque of the drive unit 40. According to this embodiment, the length of the shoulder belt 16 can be finely adjusted by rotating the adjustment dial 24.

The driven drum 53 is arranged in parallel so as to be offset from the drive shaft 41, and is aligned with the drive shaft 41 in a direction perpendicular to the axis. Flange 54s are provided at both ends of the drum 52. With such a pair of flanges 54, the retractor belt 51 is neatly wound between the flanges 54 and 54.
The shaft 23b is a torque transmission element that transmits the rotation and torque of the driven drum 53 to the roller 23. One end region of the shaft 23b is fixed to the driven drum 53, and the other end region of the shaft 23b is fixed to the roller 23. In this way, the shaft 23b drives and connects the roller 23 and the drum 52, and the roller 23 rotates integrally with the drum 52.

The shaft 23b extends along the center of the driven drum 53 from one end to the other end of the driven drum 53. The shaft 23b protrudes outward in the axial direction of the drum 52 beyond the flange 54 and is rotatably supported by a bearing built in the support bracket 55.

Screw holes 25p and 55p are formed in the bearing 55 and the pair of support walls 25 described above, respectively. Further, a through hole 42h is formed in the bracket 42. The screw holes 25p and 55p and the through hole 42h are opened upward, the through hole 42h is penetrated in the vertical direction, and a set screw is passed through the through hole 42h to be fixed to the upper substrate 26 (FIG. 2A).

2 (a) to 2 (c) are views showing the substrate 26, the roller 23, the adjustment dial 24, and the lock mechanism 30 of the restraint belt adjusting mechanism 20, and the upper part of the paper surface points to the upper part of the child seat. Note that FIG. 2A shows a state in which the support wall 25 farther from the torque transmission portion 50 is removed from the pair of support walls 25 and 25 and viewed from the support wall 25 side. 2 (b) and 2 (c) show the inside of the locking mechanism 30.

With reference to FIGS. 1 (b) and 1 (c), the lock mechanism 30 includes a lock base 25b, a movable wall 31b, an operator 32, a cam member 33, pins 34 to 37, and a return spring 38. , 39 and a stopper 29.

The lock base 25b is erected on the lower edges of the two support walls 25 and integrally formed with the support walls 25. Further, the lock base portion 25b arranged on the lower side faces the substrate 26 arranged on the upper side, and together with the pair of support walls 25 and 25, partitions a passage extending in the longitudinal direction. The adjusting belt 22 is passed through such a passage, and the movable wall 31b moves back and forth. In the present embodiment, the longitudinal direction corresponds to the front-rear direction of the seat surface portion 12.

The movable wall 31b is a pair of walls facing each other via an adjusting belt, and is adjacent to the inner wall surface of the support wall 25. An intermediate wall 31c is erected on the upper edge of the two movable walls 31, and the movable wall 31b and the intermediate wall 31c are integrally formed.

Pins 34 are further erected on the two movable walls 31b. The pin 34 penetrates each movable wall 31b and projects outward, further penetrates the elongated hole 25j formed in the support wall 25, and projects outward of the support wall 25. Operators 32 are connected to both ends of the pin 34. With reference to FIGS. 1 (b) and 1 (c), the actuator 32 is supported by a pair of upper edges of the support walls 25, 25, and the length of the support walls 25, 25 along these upper edges. Slide in the direction. The elongated hole 25j also extends in the longitudinal direction, and the pin 34 is also displaced along the elongated hole 25j.

The width dimension of the operator 32 corresponding to the axial direction of the adjustment dial 24 is larger than the distance between the two adjustment dials 24. The operator 32 is arranged adjacent to the adjustment dial 24 so as to hold the adjustment dial 24.

An elongated hole 31j extending in the longitudinal direction is formed in each of the two movable walls 31b. One pin 35 is passed through the two elongated holes 31j. The pins 35 are erected on a pair of support walls 25, 25. Return springs 38 are erected on pins 34 and 35 extending in the lateral direction. The return spring 38 urges the movable wall 31b in the retracting direction. Therefore, the movable wall 31b and the intermediate wall 31c are normally set to the lock positions shown in FIGS. 1 (b) to 2 (b). When the operator pulls the operator 32 forward F against the elastic force of the return spring 38, the movable wall 31b and the intermediate wall 31c advance to the unlocked position shown in FIG. 2C.

As shown in FIG. 1B, a pair of support walls 25 are formed with elongated holes 25k extending in the vertical direction. A common pin 36 is passed through each elongated hole 25k. Further, a common pin 37 is passed through each elongated hole 25k. The pins 36 are spaced apart above the pins 37, and these pins 36, 37 extend parallel to the lateral direction.

As shown in FIG. 2A, each movable wall 31b is formed with an opening 31f having a pair of slopes 31d and 31d facing each other in the vertical direction. Each slope 31d is inclined so as to be upward toward the front and downward toward the rear. That is, the rear end of the opening 31f is close to the lock base 25b, and the front end of the opening 31f is far from the lock base 25b. The pins 36 and 37 described above are passed through the openings 31f.

As shown in FIG. 1C, a cam member 33 is attached to the central portion of the pins 36 and 37. As shown in FIG. 2B, the cam member 33 is substantially semicircular when viewed in the lateral direction, and has a cam surface 33c which is an arc that bulges downward. The cam surface 33c is provided on one side and the other side in the longitudinal direction when viewed from the pins 36 and 37, respectively, and the cam surface 33c is provided upward in the longitudinal direction as the distance from the pins 36 and 37 increases.

A stopper 29 is arranged below the cam member 33. The stopper 29 is provided on one side and the other side in the longitudinal direction when viewed from the pins 36 and 37, and is pivotally supported by a pivot axis 28 extending in the lateral direction. The pivot 28 is supported by brackets 27 at both ends. The bracket 27 is screwed to the lock base 25b.

Each stopper 29 is provided with an arm portion 29b and a sliding contact portion 29c at a portion away from the pivot 28. The arm 29b extends toward the pin 37. The sliding contact portion 29c directs to the lock base portion 25b. In the present embodiment, the metal sliding contact portion 29c faces the plate portion of the metal placket 27.

A return spring 39 is coaxially arranged on each axis 28. The return spring 39 urges the stopper 29 to the lock position shown in FIGS. 1 (c) and 2 (b). The sliding contact portion 29c of the stopper 29 is formed in a jagged surface shape, and presses the adjusting belt 22 toward the lock base portion 25b at the lock position. As a result, the adjustment belt 22 is sandwiched between the stopper 29 and the play area portion of the bracket 27, and movement is prohibited. The arm portion 29b of the stopper 29 is placed in an upright posture at the locked position.

When unlocking the adjustment belt 22, the operator pulls out the operator 32 forward F. Then, the movable wall 31b moves in the longitudinal direction, and the pin 36 shown in FIG. 2A is pushed by the slope 31d, displaced along the slope 31d, and approaches the lock base 25b. Then, the stopper 29 descends from the lock position shown in FIG. 2B to the unlocking position shown in FIG. 2C, and each cam surface 33f comes into contact with each arm portion 29b and pushes it down. When each arm portion 29b is gradually pushed down along the arc surface of each cam surface 33f, the stopper 29 rotates and the sliding contact portion 29c moves upward so as to be separated from the lock base portion 25b. As a result, the adjusting belt 22 is not pinched at all and is allowed to be unwound by winding with respect to the roller 23.

In such an unlocked state, the drive unit 40 drives the roller 23 in the winding direction, so that the adjustment belt 22 is wound by the roller 23 and the shoulder belt 16 (FIG. 1A) is shortened.

When the shoulder belt 16 is not sufficiently shortened due to a small driving torque of the driving unit 40 or the like, the operator may pull out the operator 32 with one hand and turn the adjustment dial 24 with the same one hand. By turning the adjustment dial 24, the shoulder belt 16 is finely adjusted to be shorter.

Alternatively, when the shoulder belt 16 is too short due to a large drive torque of the drive unit 40 or the like, the operator may pull out the operator 32 with one hand and turn the adjustment dial 24 with the same hand. By turning the adjustment dial 24, the shoulder belt 16 is finely adjusted to be long.

Since the restraint belt adjusting mechanism 20 of the present invention includes the driving unit 40 and the adjusting dial 24, the operator can easily adjust the shoulder belt 16 to an appropriate length.

When the drive unit 40 is malfunctioning, the operator can adjust the shoulder belt 16 to an appropriate length by turning the adjustment dial 24. Since the drive unit 40 is provided on a shaft different from the rotation shaft of the roller 23, it can be easily maintained and replaced.

When the operator releases the operator 32, the elastic force of the return springs 38 and 39 causes the movable wall 31b, the intermediate wall 31c, the cam member 33, each pin, and the stopper 29 to be moved from FIGS. 1B to 2B. It returns to the lock position shown in (b). As a modification (not shown), the drive unit 40 may be an electric motor instead of the spring element.

Next, the restraint belt adjusting mechanism according to the second embodiment of the present invention will be described. 3 and 4 are views showing a second embodiment of the present invention. Regarding the second embodiment, the same reference numerals will be given to the configurations common to the above-described embodiments, and the description thereof will be omitted, and different configurations will be described below.

3 (a) and 3 (b) are perspective views, FIG. 3 (c) is a front view seen from the front F, and FIG. 3 (d) is a cross-sectional view seen from the front F.

In the restraint belt adjusting mechanism 20 of the second embodiment, the drive unit 40 is arranged coaxially with the roller 23. Then, the torque transmission unit 50 is interposed between the drive unit 40 and the roller 23. The drive unit 40 is an electric motor.

The drive unit 40 is connected to a power supply and a switch (not shown). While the switch is turned on, the drive unit 40 outputs a rotational torque in the winding direction.

As shown in FIG. 3D, the torque transmission unit 50 has an input member 56, an output member 57, and an engaging claw 58. Normally, the input member 56 rotates the output member 57 at the same speed, but a predetermined value. It is a torque limiter that allows relative rotation of the input member 56 and the output member 57 under the conditions. The input member 56 is coupled to the motor rotation shaft of the drive unit 40 and rotates at the same speed as the motor rotation shaft. The output member 57 is coupled to the shaft 23b, which is a torque transmission element.

At the axial center of the torque limiter (torque transmission unit 50), the input member 56 and the output member 57 are formed so as to form a cylindrical portion and a cylindrical portion inserted through the center of the cylindrical portion, and the input member 56, The output member 57 and the engaging claw 58 are arranged so as to overlap each other in the axial direction.

4A and 4B are cross-sectional views showing the central portion of the torque limiter in the axial direction. FIG. 4A shows a normal torque transmission state, and FIGS. 4B and 4C show a slip state in which torque is not transmitted. Represent each. On the inner circumference of the output member 57, a gentle slope 57b and a steep step 57c are repeatedly arranged so as to be alternately continuous.

A through hole 56h extending in the radial direction is formed in the input member 56, and a pair of engaging claws 58, 58 are arranged back to back in the 56h. The tip of the engaging claw 58 is formed in a claw shape that tapers in the outer diameter direction of the input member 56. An elastic member 59 is reduced between the pair of engaging claws 58, 58. The elastic member 59 is, for example, a coil spring, and urges each engaging claw 58 in the outer diameter direction.

As shown in FIG. 4A, the elastic member 59 normally engages with the step 57c. When the input member 56 rotates in the winding direction q, the output member 57 also rotates in the same winding direction q at the same speed. As described above, the adjusting belt 22 is allowed to be wound or unwound by the operator pulling the operator 32. Normally, the torque limiter transmits the winding torque of the electric motor (drive unit 40) to the roller 23, winds the adjusting belt 22 by the roller 23, and shortens the shoulder belt 16.

When a load equal to or greater than the drive torque of the electric motor (drive unit 40) is applied to the torque limiter, the engagement claw 58 and the step 57c are disengaged as shown in FIG. 4B, and the engagement claw 58 is inside the through hole 56h. Retreat to. As a result, the input member 56 slips with respect to the output member 57, and the electric motor (drive unit 40) is protected from overload.

When the adjustment dial 24 shown in FIG. 4C is manually rotated in the winding direction q as shown by the thick arrow, the roller 23 rotates according to the adjustment dial 24, and the adjustment belt 22 is wound by the roller 23. At the same time, the output member 57 also rotates at the same speed. At this time, the engaging claw 58 is in sliding contact with the slope 57b and does not engage with the step 57c, so that the output member 57 idles with respect to the input member 56. According to the present embodiment, even if the drive torque of the electric motor (drive unit 40) is insufficient or the electric motor (drive unit 40) is malfunctioning, the adjustment dial 24 is manually rotated to wind up the adjustment belt 22. be able to.

Next, the restraint belt adjusting mechanism according to the third embodiment of the present invention will be described. FIG. 5 is a diagram showing a third embodiment of the present invention. Regarding the third embodiment, the same reference numerals will be given to the configurations common to the above-described embodiments, and the description thereof will be omitted, and different configurations will be described below.

5 (a) and 5 (b) are perspective views, FIG. 5 (c) is a front view seen from the front F, and FIG. 5 (d) is a cross-sectional view seen from the front F. The restraint belt adjusting mechanism 20 of the third embodiment includes a drive transmission unit 60 in place of the drive unit 40 and the torque transmission unit 50 described above. The drive transmission unit 60 has a mainspring spring 61, a case 62, a central member 63, and a cover 64. The cover 64 is shown in FIGS. 5 (c) and 5 (d), but is not shown in FIG. 5 (b).

The mainspring 61 as a drive unit is housed inside the case 62. The outer diameter end of the mainspring 61 is locked to the inner wall surface of the case 62. The inner diameter end of the mainspring 61 is locked to the circular center member 63 housed in the case 62. That is, the inner diameter end of the mainspring 61 is connected to the central member 63 as the drive shaft.

The shaft 23b, which is coupled to the roller 23 and the adjustment dial 24, extends through one end of the case 62 and is coaxially coupled to the central member 63. An annular space S is secured between the case 62 and the central member 63. The annular space S has a sufficient margin to accommodate the mainspring 61 so that it can be elastically deformed.

A cover 64 is attached to the other end of the case 62. The cover 64 shields the inside of the case 62 from the outside and covers the mainspring 61, the central member 63, and the annular space S. A hole 64h through which the end of the shaft 23b is passed is formed in the center of the cover 64. The hole 64h is provided with a bearing (not shown) that rotatably supports the end of the shaft 23b.

As described above, the adjusting belt 22 is allowed to be wound or unwound by the operator pulling the operator 32. The coil spring 61 generates a winding torque as the degree of elastic deformation increases as compared with the original shape. The drive transmission unit 60 applies a take-up torque to the roller 23 via the shaft 23b. As a result, the adjusting belt 22 is wound around the roller 23, and the shoulder belt 16 is shortened.

When the operator desires to further shorten the shoulder belt 16 due to insufficient winding torque of the coil spring 61, or to lengthen the shoulder belt 16 due to the excessive winding torque of the coil spring 61. If desired, the adjustment dial 24 may be manually rotated. The coil spring 61 and the annular space S allow free rotation of the shaft 23b.

On the other hand, when the inner diameter end of the coil spring 61 does not rotate, the adjustment dial 24 can be manually rotated. At this time, since the coil spring 61 is elastically deformed in the annular space S, the rotation of the roller 23 is not restricted.

Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the illustrated embodiments. It is possible to make various modifications and modifications to the illustrated embodiment within the same range as the present invention or within the same range. For example, a part of the configurations may be extracted from the above-mentioned one embodiment, another part of the configurations may be extracted from the above-mentioned other embodiments, and these extracted configurations may be combined.

The present invention is advantageously used in childcare devices.

10 base body, 11 seat body, 12 seat surface,
13 backrest, 14 slide member, 15 headrest,
16 shoulder belt, 17 crotch belt, 19 connecting device,
20 Restraint belt adjustment mechanism, 21 Connector, 22 Adjustment belt,
23 roller, 23b shaft (torque transmission element), 23g groove,
24 Adjustment dial (adjustment operator), 25 Support wall,
25b lock base, 28 axis, 29 stopper,
29b arm, 29c sliding contact, 30 lock mechanism,
31b movable wall, 32 lock operator, 33 cam member,
34,35,36,37 pins, 38,39 return springs,
40 drive unit, 41 drive shaft, 50 torque transmission unit,
51 retractor belt, 52 drive drum, 53 driven drum,
56 input member, 57 output member, 58 engaging claw,
59 elastic member, 60 drive transmission part, 61 mainspring,
62 Case, 63 Central member.

Claims (9)

It is a structure that adjusts the belt length of the restraint belt that is provided in the child seat device and restrains the child's body.
The adjustment belt connected to the restraint belt and
A roller that is rotatably supported and winds up and unwinds the adjustment belt,
It has a lock operator and prohibits winding and / or unwinding of the adjustment belt when the lock operator is not operated, and winding and / or unwinding of the adjustment belt when the lock operator is operated. With a lock mechanism that allows
The drive unit that outputs the take-up torque and
A manually operable adjustment operator and
The take-up torque is transmitted from the drive unit to the roller to wind the adjustment belt around the roller, and in a state where the adjustment operator is operated, the roller is the adjustment operator regardless of the take-up torque. A restraint belt adjustment mechanism for children's seating devices, including a torque transmission unit that allows rotation in response to operation. The restraint belt adjusting mechanism for a child seat device according to claim 1, wherein the drive unit is a spring element. The torque transmission unit is between a drive drum driven by the drive unit, a driven drum for driving the roller, a terminal connected to the drive drum, and a tip connected to the driven drum, and between these drive / driven drums. The restraint belt adjusting mechanism for a child seating device according to claim 2, further comprising a retractor belt that is wound up and unwound by the drum. The torque transmission unit has an input member driven by the drive unit and an output member that drives the roller, and transmits a winding torque of a predetermined value or less from the input member to the output member to obtain the predetermined value. The restraint belt adjusting mechanism for a child seat device according to claim 1, which is a torque limiter that does not transmit a take-up torque exceeding a value. The torque transmitting portion has a central member connected to the spring element and transmitting the winding torque to the roller.
The restraint belt for a child seat device according to claim 2, wherein the central member is allowed to rotate in response to the operation of the adjustment operator regardless of the take-up torque while the adjustment operator is operated. Adjustment mechanism. The lock mechanism is
The base facing the adjustment belt and
The adjustment belt is provided on the side opposite to the base when viewed from the adjustment belt, and the adjustment belt is pressed and fixed toward the base in a state where the lock operator is not operated, and the lock operator is operated from the base. The restraint belt adjusting mechanism for a child seating device according to any one of claims 1 to 5, further comprising a stopper for separating. Regarding the width direction of the child seat device
The restraint belt adjusting mechanism for a child seat device according to any one of claims 1 to 6, wherein the width direction position of the roller and the width direction position of the adjustment operator are different. The restraint belt adjusting mechanism for a child seat device according to any one of claims 1 to 7, which is embedded in the front region of the seat surface portion of the child seat device. The restraint belt adjusting mechanism for a child seat device according to any one of claims 1 to 8, wherein the lock operator is arranged in the vicinity of the adjusting operator.

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