JP2009274492A - Fixing device of attachable/detachable seat device, attachable/detachable seat device, and vehicular seat device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixing structure of a child seat device having a constitution capable of compensating for differences in shock-absorbing performance according to the weight of a child. <P>SOLUTION: The child seat device 700 includes a connector 713 for executing fitting to a seat device 10, and the connector 713 is engaged with a pin 721 of a connector receiving member 719 on the seat device 10 side. The connector receiving member 719 is fixed to a backrest 102 via a shock-absorbing device 122b capable of adjusting the shock-absorbing performance. When a head-on collision occurs, a shock applied to the child seat device 700 is absorbed by the shock-absorbing device 122b. Since the shock-absorbing device 122b can adjust the shock-absorbing performance corresponding to the weight of a child to be seated, the shock-absorbing performance suitable for the weight of the child can be obtained. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a detachable seat device represented by a child seat, and more particularly to a technique for mitigating an impact applied to a child seat when an accident occurs.

  For example, when an accident occurs in which a vehicle equipped with a child seat device collides from the front (front collision), an impact is transmitted to the child seat, and damage may be applied to a child sitting on the child seat. As a technique for dealing with this problem, a technique is known in which a seat belt provided in a child seat has an impact absorbing function. For example, Patent Document 1 describes a configuration that absorbs an impact applied to a seat belt included in a child seat device by using deformation of a metal corrugated plate.

JP-A-9-136564 (abstract)

  By the way, the impact applied to the child sitting on the child seat at the time of the accident varies depending on the weight of the child. On the other hand, the weight of the child sitting on the child seat ranges from about 3 kg to 15 kg including the infant. Therefore, if the threshold value at which the shock absorbing action occurs or the shock absorbing ability is a fixed value, the shock absorbing action may not work properly depending on the weight of the child.

  In the configuration described in the cited document 1, it is possible to adjust the degree of shock absorption, but it is necessary to replace the member that absorbs the shock, and it is easy to do when using the child seat device. Can not.

  Further, in the impact absorption using the deformation of the metal corrugated plate as described in the cited document 1, the load applied to the impact absorbing member at the time of absorbing the impact (in other words, the reaction force exhibited by the impact absorbing member as its reaction) However, there is a problem that it is difficult to effectively absorb impact energy while suppressing damage to the body.

  In such a background, the present invention has a shock absorbing function in a detachable seat device mounting structure represented by a child seat device, and further has a shock absorbing function according to the weight of a person sitting on the seat device. An object is to provide a technique capable of performing adjustment. Another object of the present invention is to provide a detachable seat device that can effectively absorb energy of impact while suppressing damage to the body when the impact occurs.

  The invention according to claim 1 comprises an attachment device for detachably attaching the seat device, and a displacement portion that is opposed to the attachment device when a force is applied to the attachment device and is displaced while generating a predetermined force. And a fixing device for a detachable seat device, comprising: an impact absorbing device capable of adjusting the value of the predetermined force; and an adjusting device for adjusting the predetermined force.

  According to the first aspect of the present invention, for example, when the removable seat is a child seat device, an impact applied to the child seat device when an impact due to an accident or the like occurs is absorbed by the impact absorbing device. At this time, the impact absorbing device absorbs the impact energy by generating a predetermined reaction force (resistance force) while the displacement portion is displaced. This reaction force is continuously generated for the time during which the displacement portion continues to be displaced. That is, when the impact force acts between the child seat device mounting portion (for example, the seat device fixed to the vehicle) and the child seat, the impact absorbing device continues to generate this predetermined reaction force, while the displacement portion is predetermined. Displace at a distance of. Thereby, the impact is not instantaneously applied to the child seat, and the impact force is dispersed on the time axis. Further, the energy of the impact is absorbed by the work obtained by a value obtained by integrating the reaction force by the distance displaced by the displacement portion.

  According to this action, the impact is not transmitted to the child seat in a very short instantaneous time, but is transmitted to the child seat during the time when the displacement portion of the impact absorbing device is displaced. Since the impact strength increases as the time during which the momentum is transmitted is shorter, the impact strength received by the child sitting on the child seat device is reduced by the above-described action.

  According to the first aspect of the present invention, the value of the reaction force generated by the impact absorbing device can be adjusted. For this reason, for example, by setting the value of the reaction force according to the weight of the child sitting on the child seat, it is possible to obtain an appropriate shock absorption performance in accordance with the weight of the child. For example, when a relatively light child sits on a child seat device, the total weight of the child seat device and the child sitting there is relatively light, and the amount of exercise when both are considered as a unit is also relative Small. Therefore, the reaction force generated by the impact absorbing device is weaker in the range in which the displacement amount of the displacement portion can be secured, and the impact received by the child seat device (that is, the impact received by the child sitting there) may be weaker. This is preferable in terms of preventing a child sitting on the child seat apparatus from being burdened as much as possible.

  On the other hand, when a relatively heavy child sits on the child shield device, the total weight of the child seat device and the child sitting there is relatively heavy, and the amount of exercise when both are considered as a unit is also relative. It ’s big. For this reason, when an impact absorbing device that is set to be suitable for a relatively light child is used, there is a possibility that the energy of the impact cannot be absorbed within the allowable displacement range of the displacement portion. If the impact energy cannot be absorbed within the displacement allowable range of the displacement part, the remaining kinetic energy will be added to the child seat device in a very short time when the displacement limit is reached, and the seated child may be greatly damaged. Get higher.

  According to the first aspect of the present invention, the shock absorption characteristics suitable for the weight of the seated child can be obtained by adjusting the magnitude of the reaction force generated by the shock absorbing device according to the weight of the child seated on the child seat. Can be obtained. For this reason, it is possible to correct the difference in shock absorption performance due to the weight of the child. The fixing device for the detachable seat device according to the present invention is not limited to a vehicle, and can be used for various public transport facilities such as airplanes and railroads, vehicles for amusement facilities, and the like. The vehicle is not limited to a passenger car, and may be a truck or a bus.

  Examples of the portion including the fixing device for the detachable seat device according to claim 1 include the child seat device side, the seat device side for fixing the child seat device, and both.

  According to a second aspect of the present invention, in the first aspect of the present invention, the impact absorbing device generates a predetermined force by plastically deforming the object. According to the second aspect of the present invention, when receiving an impact, the shock absorbing device plastically deforms the object and continuously performs the plastic deformation so that a predetermined force is used as a reaction force. appear. In addition, the displacement portion is displaced while the plastic deformation continues. By using plastic deformation, a predetermined force can be effectively generated. In addition, the value of the predetermined force (reaction force) generated when absorbing the impact can be adjusted by setting how much plastic deformation is performed.

  The invention according to claim 3 further comprises detection means for detecting the physique or weight of the seated person in the invention according to claim 1 or claim 2, wherein the adjustment means is based on the output of the detection means. Adjustment is performed. According to the invention described in claim 3, for example, the physique or weight of a child seated in the child seat device is detected, and the shock absorbing function of the shock absorbing device is adjusted based on the detection result. For this reason, the difference in the shock absorbing function due to the difference in the weight of the seated child can be corrected. As a detection means, a means for detecting the weight of a seated child using a pressure sensor arranged in a seat, or an image captured by an imaging device is analyzed, and a photographed child's physique is detected by software processing. Means can be mentioned.

  As a method for detecting the weight of a child sitting on a child seat, a weight detection sensor is arranged on the seat surface of the child seat device, a weight sensor is arranged on the seat surface of the vehicle side seat device to which the child seat device is fixed, and the child seat device And the total weight of the child sitting there.

  When detecting the physique by image processing, the physique of the seated person is determined by image analysis of the captured image data, and the strength of the correlation between the physique and the weight is used to respond to the weight of the seated person The shock absorber is adjusted.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the shock absorbing device is restrained by the first member, the first member, and the first member. A rigid body protruding from the member; and a second member movable relative to the first member and capable of contacting the rigid body, wherein the second member is moved relative to the first member. The rigid body comes into contact with the second member, the second member is plastically deformed at the contact portion, and the dimension protruding from the first member of the rigid body is changed, thereby adjusting the value of the predetermined force. It is performed.

  According to the fourth aspect of the present invention, when the second member moves relative to the first member, the rigid body sinks into the second member, and the second member is plastically deformed at that portion. The force required for plastic deformation of the second member by the rigid body is a reaction force generated by the impact absorbing device. When the relative movement is continued, the plastic deformation of the second member due to the rigid body further occurs, and the impact absorbing device subsequently generates a reaction force as a reaction of the force necessary for the plastic deformation.

  Note that the rigid body means that the counterpart member that causes plastic deformation (in this case, the second member) has rigidity enough to cause plastic deformation. As the rigid body, for example, a steel material, zirconium, a vanadium alloy, or the like can be used. The shape of the rigid body may be a shape that can stably perform plastic deformation of the second member without hindrance.

  A fifth aspect of the present invention is the first cylindrical structure according to any one of the first to third aspects, wherein the shock absorbing device is arranged coaxially and is capable of relative sliding. And a second cylindrical structure, and a rigid body that is constrained by the first cylindrical structure in a state of protruding from the first cylindrical structure and that can contact the second cylindrical structure. The protruding amount of the rigid body from the first tubular structure can be selected from a plurality of stages, and is selected from the plurality of stages by the adjusting means.

  According to the fifth aspect of the present invention, in the two cylindrical structures disposed so as to be relatively slidable coaxially, the rigid body restrained by one cylindrical structure is the other cylindrical structure. When the body contacts the body and the two structures move relatively, the rigid body plastically deforms the other structure at the contact portion. Due to this plastic deformation, a reaction force is generated from the impact absorbing device. Moreover, the amount of biting into the second cylindrical structure (the depth of biting) is adjusted by adjusting the amount of protrusion of the rigid body from the first cylindrical structure. Thereby, the magnitude | size of the reaction force from the impact-absorbing apparatus resulting from the reaction which generate | occur | produces when generating a plastic deformation in the 2nd cylindrical structure can be adjusted. Examples of the shape of the cylindrical structure include a cylinder and a square tube having a polygonal cross section. The number of the plurality of stages is not limited, and the meaning of the plurality of stages includes a case where the protrusion amount can be continuously adjusted.

  The invention according to claim 6 is the invention according to claim 5, wherein the first cylindrical structure is positioned relatively inside, and the second cylindrical structure is positioned relatively outside, The second cylindrical structure has a tapered portion whose inner diameter changes in the axial direction, the rigid body is a hard sphere, and can contact the tapered portion, and is disposed inside the first cylindrical structure. Has a support portion whose cross-sectional dimension changes stepwise or continuously, and a hard ball support member for supporting a hard ball from the inside of the first cylindrical structure is arranged at a part of the support portion, and is adjusted. The selection from a plurality of stages by means is performed by moving the rigid ball support member in the axial direction inside the first cylindrical structure to change the amount of projection of the rigid sphere from the first cylindrical structure. It is characterized by being.

  According to the sixth aspect of the present invention, by moving the hard sphere support member inside the first cylindrical structure, portions having different cross-sectional dimensions of the support portion are selected, whereby the hard sphere is in the first cylindrical shape. The amount of protrusion protruding from the structure is adjusted. As a result, the amount of biting of the hard sphere into the second cylindrical structure during operation is adjusted, and the magnitude of the reaction force generated by the impact absorbing device is set.

  The invention according to claim 7 includes an attachment device for detachably attaching the sheet device, and a displacement portion that is displaced while plastically deforming an object when a force is applied to the attachment device, and the degree of the plastic deformation A fixing device for a detachable seat device, comprising: an impact absorbing device capable of adjusting the amount of adjustment; and an adjusting device for adjusting the degree of deformation. Here, the degree of plastic deformation can be evaluated by the amount of plastic deformation in the plastic deformation target.

  The invention according to claim 8 is a detachable seat apparatus comprising the fixing device for the detachable sheet apparatus according to any one of claims 1 to 7. The removable seat device according to the invention of claim 8 includes a child seat device for sitting a child, but is not necessarily limited thereto, and the removable seat device is for an adult to sit on. May be.

  According to a ninth aspect of the invention, in the eighth aspect of the invention, an attachment device is fixed to the rear surface of the removable seat device via an impact absorbing device. According to the ninth aspect of the present invention, the attachment device is fixed to the detachable seat device via the impact absorbing device, and the detachable seat device is connected to the vehicle side seat device via the attachment device. Attached to. For this reason, the impact acting between the seat device on the vehicle side and the back side of the detachable seat device is transmitted through the impact absorbing device, and at this time, the impact is absorbed by the impact absorbing device. Thereby, the impact applied to the detachable seat device mounted on the vehicle seat device when an accident occurs can be effectively reduced.

  A tenth aspect of the present invention is a vehicle seat device including the detachable seat device fixing device according to any one of the first to seventh aspects. According to invention of Claim 10, the mechanism for mounting | wearing a detachable seat apparatus with the seat apparatus of a vehicle is arrange | positioned, This mechanism has the structure as described in any one of Claims 1-7. To prepare.

  According to an eleventh aspect of the present invention, in the invention according to the tenth aspect, the vehicle seat device includes a backrest portion, and a detachable seat device fixing device includes an impact absorbing device on the backrest portion. It is characterized by being fixed via. According to the eleventh aspect of the present invention, the attachment device is fixed to the vehicle side seat device via the impact absorbing device, and the detachable seat device is connected to the vehicle side seat device via the attachment device. Attached to the backrest. For this reason, the impact acting between the back portion of the seat device on the vehicle side and the back side of the detachable seat device is transmitted through the impact absorbing device. At this time, the impact is absorbed by the impact absorbing device. Is done. Thereby, the impact applied to the detachable seat device mounted on the vehicle seat device when an accident occurs can be effectively reduced.

  ADVANTAGE OF THE INVENTION According to this invention, the technique which can adjust the shock absorption performance which absorbs the impact added to the detachable seat apparatus represented by the child seat according to the body weight of the person sitting on this seat apparatus is provided. In addition, according to the present invention, in the detachable seat device, there is provided a technique capable of effectively absorbing the energy of the impact while suppressing damage to the body when the impact occurs.

(1) First Embodiment Hereinafter, an example of an embodiment using the present invention will be described. Here, an example in which the present invention is applied to a structure for fixing a child seat device to a vehicle seat device using the ISOFIX system defined in ISO-13216-1: 1999 will be described. In this example, a child seat device having a structure for fixing to a vehicle seat corresponding to the ISOFIX system and a vehicle seat device corresponding to the ISOFIX system to which the child seat device is attached will be described.

(Child seat device)
FIG. 1 is a conceptual diagram showing an example of a child seat device. FIG. 1A is a conceptual diagram viewed from the side, and FIG. 1B is a conceptual diagram viewed from the front. In FIG. 1A, a part of the internal configuration can be seen through. FIG. 1A shows a child seat device 700. The child seat device 700 includes a seat portion 701, a backrest portion 702, and a cushion material 703. In this example, the seat portion 701 and the backrest portion 702 have an integral structure. A pull-out belt portion 704 is pulled out from a portion from the center front of the seat portion 701 (a portion near the crotch of the child sitting), and a bifurcated buckle 705 is fixed to the tip. The pull-out belt 704 drawn into the seat portion 701 contacts the guide member 706, and the extending direction is changed to the rear, and is connected to the shock absorbing device 122a.

  As will be described later, the impact absorbing device 122a includes an inner cylindrical structure and an outer cylindrical structure, and the inner cylindrical structure is fixed to the skeleton structure of the seat portion 701 via a metal fitting 707, and the outer cylindrical structure. A structure is connected to the end of the drawer belt 704. A control wiring 716 is drawn out from the shock absorbing device 122a, and the control wiring 716 is connected to the control unit 717. A wiring from the reaction force setting dial 718 is connected to the control unit 717. When the reaction force adjustment dial 718 is adjusted according to the weight of the child sitting on the child seat device 700, the reaction force (impact of the shock absorbing device 122a) Absorption characteristics) are set. Details of the reaction force setting mechanism and the impact absorbing device 122a will be described later.

  As shown in FIG. 1B, seat belts 709 and 710 are drawn out from two places on the left and right of the upper portion of the portion corresponding to the backrest of the cushion material 703. A fastener 709a having an insertion fitting is attached to the distal end of the seat belt 709, and a fastener 710a having an insertion fitting is attached to the distal end of the seat belt 710. As shown in FIG. 1A, a seat belt 709 drawn into the back surface is changed in a downward direction by a guide 711, and a retractor (winding device) fixed to a skeletal structure (not shown) of a backrest portion 702. It is wound up while being tensioned by 712. Although not shown, the seat belt 710 has a similar storage structure.

  Two slits (not shown) for inserting the fittings of the fasteners 709a and 710a are provided on the left and right of the upper portion of the bifurcated buckle 705. The fasteners 709a and 710a are detachably connected to the bifurcated buckle 705 by inserting the fittings of the fasteners 709a and 710a into the respective slits. The bifurcated buckle 705 is provided with a disengagement button 705a. By pressing the disengagement button 705a, the fasteners 709a and 710a inserted and fixed to the bifurcated buckle 705 are removed from the bifurcated buckle 705. be able to. The mechanism for detachably fixing the fasteners 709a and 710a to the bifurcated buckle 705 is the same as that used for a known seat belt, and thus the description thereof is omitted.

  Connectors 713 are fixed to the left and right sides of the lower rear side of the backrest portion 702 (or the rear end portion of the seat portion 701). Although one connector 713 is shown in FIG. 1, the connectors are arranged on the left and right sides of the rear side of the child seat device 700. The connector 713 is a flat metal and is provided with an opening 713a. The connector 713 is coupled to a vehicle-side seat device (not shown in FIG. 1) and has a function of fixing the child seat 700 to the vehicle-side seat device. The connector 713 is an example of an attachment device for detachably attaching a seat device (in this case, the child seat device 700). The connection structure of the connector 713 will be described later.

  An upper fixing belt 714 extending rearward is attached to the upper portion of the backrest portion 702. A fastener 715 is attached to the tip of the upper fixing belt 714. The structure of the fastener 715 is the same as the fasteners 709a and 710a. The upper part of the child seat device 700 is fixed to the vehicle by coupling the fastener 715 to the vehicle side not shown in FIG. The fastener 715 is an example of an attachment device for detachably attaching a seat device (in this case, the child seat device 700). The above-mentioned coupling structure will be described later.

(Vehicle side seat device)
FIG. 2 is a conceptual diagram (A) showing an outline of a vehicle-side seat device fixed to the vehicle, and a conceptual diagram (B) showing a state in which the child seat device of FIG. 1 is attached thereto. In FIG. 2, the drawing is such that a part of the internal structure can be seen through. FIG. 2 shows the seat device 10 fixed to the vehicle body. The seat device 10 includes a seat portion 101 fixed to a floor surface or a skeleton structure of a vehicle body (not shown), and a backrest portion 102 fixed to the seat portion 101. Note that the reclining mechanism, the position adjustment function of the seat portion 101, and the seat belt device are not shown.

  Inside the backrest 102, a connector receiving member 719, which is a coupling partner member of the connector of FIG. 1, is fixed to the skeleton structure (not shown) via an impact absorbing device 122b. The shock absorbing device 122b basically has the same structure as the shock absorbing device 122a, and its inner cylindrical structure is fixed to a skeleton structure (not shown) of the backrest portion 102 via a metal fitting 720, and its outer cylindrical structure. The body is fixed to the connector receiving member 719.

  The connector receiving member 719 has a substantially U-shape when viewed from the upper side of the figure, and is a pin that is urged by a spring in the U-shaped gap in the depth direction of the drawing and can enter and exit in that direction. 721. As shown in FIG. 2B, when the connector 713 is inserted into the U-shaped portion of the connector receiving member 719, the pin 721 is pushed away by the connector 713, and then the pin 721 is fitted into the opening 713a in FIG. As a result, the pin 721 is engaged with the opening 713a. As a result, the connector 713 is coupled and fixed to the connector receiving member 719. In order to release this engaged state, a lever or button (not shown) provided on the side surface of the backrest 102 is pushed, the pin 721 is moved against the urging force, and the pin 721 is retracted from the opening 713a. The connector receiving member 719 is an example of an attachment device for detachably attaching a seat device (in this case, the child seat device 700).

  A control wiring 722 is drawn out from the shock absorbing device 122b, and the control wiring 722 is connected to the control unit 723. The control unit 723 is connected to a signal line from a reaction force adjustment dial 724 that adjusts a set value of the reaction force of the impact absorbing devices 122b and 122c.

  An impact absorbing device 122c is disposed in the backrest 102. A control wiring 728 is drawn out from the shock absorbing device 122c, and the control wiring 728 is connected to the control unit 723. The shock absorbing device 122c has an inner cylindrical structure fixed to a skeletal structure (not shown) of the backrest portion 102 via a fixing bracket 725, and an outer cylindrical structure connected to one end of a back drawer belt 726. Yes. The other end of the back drawer belt 726 is connected to the buckle 727. The buckle 727 has a structure similar to a buckle of a normal seat belt device, and has a structure in which the engagement state is locked when the insertion fitting is inserted, and the engagement is released when a release button (not shown) is pressed. ing. The buckle 727 is an example of an attachment device for detachably attaching the seat device (in this case, the child seat device 700).

(How to attach the child seat device)
Next, an example of a state in which the child seat device is mounted on the vehicle side seat device will be described. FIG. 2B shows a state where the child seat device 700 shown in FIG. 1 is attached to the seat device 10 on the vehicle side. In this example, the seat belt device (not shown) of the seat device 10 is not used, and the child seat device 700 is attached and fixed to the seat device 10 by a fixing mechanism conforming to the ISOFIX system.

  In order to attach the child seat device 700 to the seat device 10, the connector 713 (see FIG. 1) of the child seat device 700 is inserted into the connector receiving member 719 disposed inside the backrest portion 102 of the seat device 10, and the pin 721 is inserted into the opening 713a. And the connector 713 is coupled to the connector receiving member 719. Further, the upper fixing belt 714 of the child seat device 700 is rotated to the rear of the seat portion 102, the fastener 715 at the tip thereof is inserted into the buckle 727, and the fastener 715 is coupled to the buckle 727. In this way, the child seat device 700 is attached to the seat device 10.

  In order to remove the child seat device 700 from the seat device 10, the fastener 715 is removed from the buckle 727, and an operating means (not shown) is operated to retract the pin 721 so that the pin 721 engages with the opening 713 a of the connector 713. Is released. In this state, the child seat device 700 is pulled away from the seat device 10.

(Shock absorber)
Hereinafter, the detailed structure of the impact absorbing devices 122a, 122b and 122c will be described. Although the basic structure is as described below, each of the shock absorbing devices 122a, 122b, and 122c is individually set in size, material, etc. so as to exhibit the required shock absorbing function.

  FIG. 3 is a conceptual diagram showing an outline of the impact absorbing devices 122a to 122c. FIG. 3 shows an impact absorbing device 122 as an impact absorbing device having a common basic structure. Here, FIG. 3A shows a steady state where the shock absorbing function is not expressed (that is, a state before receiving the shock), and FIG. 3B shows a state where the shock absorbing function is expressed after receiving the shock. (Or a state after the shock absorbing function is manifested). FIG. 4C shows a modification.

  An impact absorbing device 122 shown in FIG. 3 includes an inner cylindrical structure 201 and an outer cylindrical structure 202, both of which have a cylindrical shape as a basic structure. The outer cylindrical structure 202 has a structure in which the inner cylindrical structure 201 is accommodated in a relatively movable state on the inner side. In this example, the inner cylindrical structure 201 is slidable inside the outer cylindrical structure 202. The inner cylindrical structure 201 has a structure that can be relatively displaced by being pulled out from the outer cylindrical structure 202 when the outer cylindrical structure 202 is partially plastically deformed. A portion where the inner tubular structure 201 is displaced relative to the outer tubular structure 202 is an example of the displacement portion of the present invention. The inner cylindrical structure 201 is an example of a first member or a first cylindrical structure, and the outer cylindrical structure 202 is an example of a second member or a second cylindrical structure. By fixing the outer cylindrical structure 202 to the first mating member and fixing the inner cylindrical structure 201 to the second mating member, both the first mating member and the second mating member The impact acting in the direction to release the shock absorber is absorbed by the shock absorber 122.

  A control ring 203 which is an example of a hard sphere support member is disposed inside the inner cylindrical structure 201. The control ring 203 is held in a slidable state inside the inner cylindrical structure 201. The control ring 203 has a structure in which four cylindrical members a, b, c and d having different outer diameters are arranged on the same axis in the order of the outer diameter dimensions and are integrated. That is, the control ring 203 has a configuration including a plurality of circumferential surfaces having different outer diameters (cross-sectional dimensions). The control ring 203 is an example of a hard sphere support member that includes a support portion whose cross-sectional dimensions change in stages. Here, the axis refers to the axis of the inner cylindrical structure 201, the outer cylindrical structure 202, and the control ring 203.

  Of the columnar members constituting the control ring 203, the columnar member a having the maximum diameter is in contact with the inner surface of the inner cylindrical structure 201 and is slidable with respect to the inner surface. The other cylindrical members b to d have a structure capable of supporting the rigid sphere 204 from the axial center toward the outer side on the circumferential surface thereof. A plurality of the hard spheres 204 are arranged at symmetrical positions with respect to the axis. For example, four hard spheres 204 are arranged at an opening angle of 90 degrees with respect to the axis.

  The inner cylindrical structure 201 is formed with a circular hole 205 for restraining the rigid sphere 204, and the rigid sphere 204 can project outward from the hole. The projecting dimension can be adjusted depending on which portion of the control ring 203 is supported by the rigid sphere 204. In this example, the dimension by which the hard sphere 204 protrudes from the outer peripheral surface of the inner cylindrical structure 201 can be set in three stages. In the situation shown in the drawing, the rigid sphere 204 is supported from the inner side of the inner cylindrical structure 201 by the circumferential surface of the columnar member b, so that the protruding dimension is set to the maximum protruding length. When the rigid sphere is supported by the cylindrical member c, the second (medium) protruding dimension is set in three stages, and when the rigid sphere is supported by the cylindrical member d, the lowest protruding dimension in the three stages is set. It is said.

  Further, as shown in FIG. 3 (A), the outer cylindrical structure 202 has an enlarged diameter part whose inner diameter is increased in order to allow adjustment of the protruding amount of the rigid sphere 204 from the inner cylindrical structure 201 in a steady state. 202a. The outer cylindrical structure 202 includes a tapered portion 202b having an inner diameter that gradually decreases from the enlarged diameter portion 202a toward a portion that holds the inner cylindrical structure 201 in a slidable state. Here, the outer cylindrical structure 202 is made of a material (in this case, metal) in which plastic deformation effectively occurs, and the rigid sphere 204 has rigidity that can cause the outer cylindrical structure 202 to undergo plastic deformation. It is comprised by the material which has. The inner cylindrical structure 201 is made of a material that ensures strength that does not cause breakage or deformation, which is a problem during shock absorption.

  A groove 56 extending in the axial direction is formed on the outer periphery of the control ring 203, and a protruding rail 55 extending in the axial direction formed on the inner surface of the inner cylindrical structure 201 is slid into the groove 56. They are engaged in a movable state. With this structure, the control ring 203 is slidable in the axial direction with respect to the inner cylindrical structure 201 and is not rotated.

  A screw hole 57 having a female screw structure formed on the inner periphery is formed in the shaft portion of the control ring 203. A screw rod 54 is screwed into and engaged with the screw hole 57. The screw rod 54 is connected to the rotation shaft of the pulse motor 51 through the reduction gear 53. The pulse motor 51 is fixed inside the inner cylindrical structure 201 via a spacer 52. Therefore, when the pulse motor 51 rotates, the screw rod 54 rotates, and the control ring 203 meshed with the screw rod 54 through the screw hole 57 is relative to the inner cylindrical structure 201 in the axial direction (left-right direction in FIG. 3). Move on. A control wiring 51 a for supplying a driving current for driving the pulse motor 51 is connected to the pulse motor 51, and the control wiring 51 a is drawn out of the shock absorbing device 122. An example of the control wiring 51a is the control wiring 716 in FIG. 1 and the control wirings 722 and 728 in FIG.

  According to this structure, when the pulse motor 51 is rotated and the control ring 203 is relatively moved in the right direction in the drawing, the hard sphere 204 is supported by the circumferential surface portion of the control ring having a smaller outer diameter. As a result, the protruding amount of the hard sphere 204 from the inner cylindrical structure 201 is reduced. Further, when the pulse motor 51 is rotated and the control ring 203 is relatively moved in the left direction in the drawing, the hard sphere 204 is supported by the circumferential surface portion of the control ring 203 having a larger diameter. As a result, the protruding amount of the hard sphere 204 from the inner cylindrical structure 201 is increased. By this mechanism, by rotating the pulse motor 51, the protruding amount of the hard sphere 204 from the inner cylindrical structure 201 is adjusted stepwise (three steps in this example).

(Control system configuration)
FIG. 4 is a block diagram showing the configuration of a control system for setting the reaction force of the impact absorbing device. In the example shown in FIGS. 1 and 2, two sets of control systems of this block structure are provided, one of which adjusts the reaction force of the shock absorber 122a, and the other is the shock absorbers 122b and 122c. Adjust the reaction force.

  FIG. 4 shows reaction force adjustment dials 718 and 724 and control units 717 and 723 shown in FIGS. 1 and 2. The control units 717 and 723 include a control signal generation circuit 62 and a motor drive circuit 63. The control signal generation circuit 62 calculates the number of rotations of the pulse motor 51 from the number of pulses sent to the pulse motor 51 (see FIG. 3), and acquires position information of the control ring 203 from this number of rotations. The control signal generation circuit 62 sends a control signal for determining the position of the control ring 203 in FIG. 3 to the motor drive circuit 63 based on the position information of the control ring 203 and the control signals from the reaction force adjustment dials 718 and 724. . In response to this control signal, the motor drive circuit 63 sends a drive current (pulse drive current) for driving the pulse motor 51 to the pulse motor 51 to cause the pulse motor 51 to perform a predetermined rotation operation.

  The reaction force adjustment dials 718 and 724 can be set according to the weight of the child sitting on the child seat device 700 in three stages such as 8 kg or less, 8 to 12 kg, or 12 kg or more. By turning the reaction force adjustment dials 718 and 724, the pulse motor 51 rotates so that the hard sphere 204 in FIG. 3 has a protruding amount corresponding to the set condition, and the position of the control ring 203 is adjusted.

(Operation of shock absorber)
Hereinafter, the principle of the shock absorbing action in the shock absorbing device 122 will be described. Now, in the state shown in FIG. 2B, it is assumed that a child sits on the child seat device 700 with the seat belts 709 and 710 fastened. In this state, it is assumed that the vehicle has received an impact from the front (for example, there was a front collision). At this time, due to the law of inertia, the child sitting on the child seat device 700 tries to move forward together with the child seat device 700 relative to the vehicle body, and the force (impact) is applied to the child seat device 700 and the seat device 10. It joins between the backrest part 102 of the.

  The force associated with the impact is a force that causes the child seat device 700 to move away from the seat device 10 toward the front. Therefore, the impact absorbing devices 122b and 122c are subjected to a pulled impact.

  The operation at this time will be described with reference to the structure of the shock absorbing device 122 shown in FIG. When the impact as described above acts on the impact absorbing device 122, a tensile impact is applied to the impact absorbing device 122, and the inner tubular structure 201 is relatively pulled in the right direction in the drawing, and the outer tubular structure is thus drawn. 202 is pulled relatively to the left in the figure. As a result, the inner cylindrical structure 201 moves to the right in the figure, the outer cylindrical structure 201 moves to the left in the figure, and the rigid sphere 204 constrained by the hole 205 becomes the tapered portion 202b of the outer cylindrical structure 202. To touch.

  When the impact is a certain level of strength or more, the hard sphere 204 bites into the tapered portion 202b of the outer cylindrical structure 202 and plastically deforms the outer cylindrical structure 202. This plastic deformation proceeds relatively toward the right in FIG. 3 in accordance with the force resulting from the tensile impact force. An example of this state is shown in FIG. FIG. 3B shows a state in which plastic deformation has occurred at the portion denoted by reference numeral 202c and the outer cylindrical structure 202 is being expanded (or a state where expansion has been completed). The plastic deformation of the outer cylindrical structure 202 occurs over a predetermined distance, so that the reaction of the outer cylindrical structure 202 relative to the inner cylindrical structure 201 is shown while showing a reaction force as a reaction of the force required for the plastic deformation. Displacement occurs. Then, the work indicated by the integral value of (force required for plastic deformation) and (distance displaced while plastic deforming) is consumed, and the energy of the impact applied to the impact absorbing device 122 is absorbed.

  The shock absorption based on such a principle is performed in the shock absorbing devices 122b and 122c shown in FIG. At this time, the child seat device 700 moves slightly forward with respect to the seat device 10 by the amount of displacement in the impact absorbing device, but the movement is showing a predetermined reaction force as shown in FIG. Therefore, the impact on the seated child is mitigated. At this time, since the impact is absorbed at the lower part and the upper part of the child seat device 700, the occurrence of problems such as the child seat device 700 tilting forward at the time of the impact is suppressed, and damage to the sitting child is prevented. Can be reduced.

  At this time, the child sitting on the child seat device 700 tries to move forward with respect to the child seat device 700 due to its own inertia, and this is restrained by the seat belts 709 and 710. At this time, if the force applied to the seat belts 709 and 710 exceeds a certain level, the tensile force similar to that described above is applied to the impact absorbing device 122a, and the impact absorbing device 122a also exhibits the impact absorbing function. Thereby, the impact applied to the child from the seat belts 709 and 710 can be reduced.

(Evaluation of shock absorption performance)
5 shows the relative displacement of the inner cylindrical structure 201 with respect to the outer cylindrical structure 202 of the shock absorber 122 of FIG. 3 as a horizontal axis, and the reaction force generated by the shock absorber 122 with this displacement. Is a graph with the vertical axis. The unit of the horizontal axis and the vertical axis of this graph is a relative value.

  The characteristics of reference numerals 401 and 402 in FIG. 5 are an example of the characteristics shown by the shock absorbing device 122 in FIG. When the impact absorbing device 122 is used, the reaction force rapidly rises until the outer cylindrical structure 202 is plastically deformed. When plastic deformation occurs, the wall surface of the outer cylindrical structure 202 is continuously plastically deformed while the rigid body 204 moves relative to the outer cylindrical structure 202. At this time, since the plastic deformation region moves and new plastic deformation occurs continuously, the force required for the plastic deformation becomes constant along with the displacement. Therefore, like the characteristics indicated by reference numerals 401 and 402, the value of the reaction force accompanying the displacement is substantially constant.

  In the configuration in FIG. 3, if the protruding dimension of the rigid sphere 204 from the inner cylindrical structure 201 is a relatively large value, the dimension that the rigid sphere 204 bites into the outer cylindrical structure 202 increases, and therefore the force required for plastic deformation (In other words, the reaction force) is increased, and for example, the setting of the characteristic 401 is obtained. Further, if the protruding dimension of the rigid sphere 204 from the inner cylindrical structure 201 is a relatively small value, the dimension that the rigid sphere 204 bites into the outer cylindrical structure 202 becomes small, so that the force required for plastic deformation (that is, the reaction force) ) Is reduced, and for example, the setting of the characteristic of reference numeral 402 is obtained. In this case, the characteristic of the reference numeral 401 is for relatively high weight, and the characteristic of the reference numeral 402 is a characteristic for relatively low weight.

  Such a characteristic means that an impact is applied to a seated person over a predetermined time. As the impact is transmitted in a shorter time, the strength of the impact increases. As shown in the characteristics shown in the figure, the impact is absorbed over a certain amount of time while being applied to the body while exhibiting a predetermined reaction force. Impact is alleviated.

(Setting of reaction force of shock absorber)
Hereinafter, the adjustment function of the shock absorbing function of the shock absorbing device will be described with an example. Here, an example in which the setting by operating the reaction force adjustment dials 718 and 724 in FIGS. 1 and 2 is possible in three stages such as 8 kg or less, 8 to 12 kg, or 12 kg or more will be described.

  First, it is assumed that a child with a weight of 10 kg is seated on the child seat 700 in the state shown in FIG. In this case, the guardian operates the reaction force adjustment dials 718 and 724 to adjust the setting to “8 to 12 kg”. When this adjustment is performed, in the control signal generation circuit 62 in the control system of FIG. 4, the cylindrical member c of FIG. 3 supports the rigid sphere 204 on its outer peripheral surface (that is, the second stage setting of three stages). Thus, a control signal for moving the control ring 203 is generated.

  Based on this control signal, the motor drive circuit 63 in FIG. 4 outputs a drive current to the pulse motor 51. Then, by this drive current, the pulse motor 51 is driven to rotate, and the control ring is set so that the protruding amount of the rigid sphere 204 of FIG. 3 from the inner cylindrical structure 201 is set to the second stage of the three stages. The position of 203 is adjusted.

  The above operation is performed in the control units 717 and 723, and the values of the reaction force generated at the time of shock absorption are set to be the second value of the three stages in the shock absorbing devices 122a, 122b, and 122c.

  In this case, the shock absorption characteristics indicated by the reference numerals 401 and 402 in FIG. 5 are suitable when the weight is 8 to 12 kg, so that it is possible to obtain a shock absorption function suitable for the weight of the child sitting. it can.

(Modification 1)
In the impact absorbing device 122 shown in FIG. 3A, the reaction force setting can be continuously adjustable. An example of this is shown in FIG. In the example shown in FIG. 3C, a control ring 213 is provided. The control ring 213 includes a conical member 59 having a tapered surface 59a in order to perform continuous switching instead of stepwise switching of the reaction force. The control ring 213 is an example of a hard sphere support member provided with a support portion whose cross-sectional dimension continuously changes. The drive mechanism and other configurations of the control ring 213 are the same as the configuration shown in FIG. The position of the control ring 203 can be precisely controlled by the principle of the sliding screw mechanism and the structure for preventing the rotation of the control ring 213, and the position of the control ring 213 is locked when the pulse motor 51 is stopped. Reaction force switching (reaction force adjustment) using 59a can be performed stably.

(Modification 2)
The position of the control ring of the shock absorbing device 122 in FIG. 3 can be adjusted by a mechanical mechanism. Hereinafter, this example will be described. FIG. 6 is a conceptual diagram showing another example of the impact absorbing device. In FIG. 6, the same reference numerals as those in FIG. 3 are the same as those described in relation to FIG.

  In this case, a control wire 124 is connected to the end face of the control ring 203, and the control ring 203 is biased by a spring 209 in a direction opposite to the direction in which the control wire 124 extends. When the control wire 124 is pulled in the right direction in the figure, the spring 209 contracts and the control ring 203 moves in the right direction in the figure. On the contrary, when the control wire 124 is loosened from the state pulled in the right direction in the figure, the spring 209 is extended, and the control ring 203 is moved in the left direction in the figure by the biasing force. Thus, the position of the control ring 203 inside the inner tubular structure 201 is adjusted. The control wire may be manually pulled or may be pulled by a motor or actuator.

(2) 2nd Embodiment Next, an example provided with the mechanism which absorbs the impact which generate | occur | produces between the child seat side and the vehicle side seat apparatus is demonstrated. FIG. 7 is a conceptual diagram showing another example of the child seat device using the invention. FIG. 7A shows the child seat device, and FIG. 7B is a conceptual diagram showing a state in which the child seat device is attached to the vehicle side seat device.

(Configuration of child seat device)
FIG. 7 shows a child seat device 730. In FIG. 7, the same reference numerals as those in FIGS. 1 and 2 that are not particularly mentioned are the same as those described in relation to FIGS.

  The child seat device 730 has a configuration in which impact absorbing devices 122d and 122e are further added to the child seat device 700 of FIG. More specifically, in the child seat device 730, the connector 713 is connected to the inner cylindrical structure of the shock absorbing device 122d via the connecting fitting 733, and the outer cylindrical structure of the shock absorbing device 122d is the seat 701. Are attached to a skeletal structure (not shown). In other words, the connector 713 is fixed to the child seat device 730 via the impact absorbing device 122d. Further, the upper fixing belt 714 is attached to the backrest 702 via the impact absorbing device 122e.

  The shock absorbing devices 122d and 122e have the basic structure shown in FIG. The control unit 732 drives the pulse motor of the shock absorber 122d and drives the pulse motor of the shock absorber 122e. The basic block structure and the function of the control unit 732 are the same as those of the control units 717 and 723 shown in FIG. A reaction force adjustment dial 731 is disposed on the side surface of the backrest portion 702. By adjusting the reaction force adjustment dial 731, reaction force is set in the shock absorbers 122a, 122d and 122e using the control unit 732. . The setting mechanism is the same as that in the first embodiment. In the child seat device 730, the seat belts 709 and 710 are directly fixed to the backrest 702.

(Vehicle side seat device)
FIG. 7B shows a state where the child seat device 730 is attached to the seat device 20. The seat device 20 includes a seat portion 21 and a backrest portion 22. The backrest 22 includes a connector receiving member 23 and a pin 24 similar to the case shown in FIG. The structure of this portion is the same as that described in relation to the connector receiving member 719 shown in FIG. A buckle 25 is fixed to the back surface of the backrest portion 22. In this example, the vehicle side seat device 20 does not include an impact absorbing device whose basic structure is shown in FIG. The connector receiving member 23 is an example of an attachment device for detachably attaching the seat device (in this case, the child seat device 730).

(Child seat device mounting structure)
Hereinafter, with reference to FIG. 7B, a structure for mounting the child seat device 730 to the seat device 20 will be described. The attachment of the child seat device 730 to the seat device 20 is the same as the attachment of the child seat device 700 to the seat device 10 shown in FIG. That is, the connector 713 of the child seat device 730 is inserted into the connector receiving member 23 built in the backrest portion 22 of the seat device 20, and the pin 24 is engaged with the opening 713 a of the connector 713. Then, the fastener 715 is turned behind the seat portion 22 so that the fastener 715 is inserted into the buckle 25 and engaged. In this way, the state shown in FIG. 7B in which the child seat device 730 is attached to the vehicle seat device 20 is obtained.

(Shock absorbing function)
For example, in the state shown in FIG. 7B, consider a case where a child sits on the child seat device 730 with the seat belts 709 and 710 fastened and a front collision occurs in this state. In this case, a tensile impact force is applied to the impact absorbing devices 122a, 122d, and 122e, and the impact is absorbed according to the principle described with reference to FIG. At this time, the impact absorbing devices 122d and 122e absorb the force (impact force) that the child seat device 730 carrying the child tries to move forward due to inertia by the displacement illustrated in FIG. 3 (A) → (B).

(Advantages of the embodiment)
The child seat device 730 illustrated in FIG. 7 can absorb the impact at the upper and lower portions of the back surface even if the vehicle does not include the impact absorbing device illustrated in FIG. 3.

(3) Third Embodiment Here, an example of a child seat apparatus having a function of absorbing impact at the time of rear impact in addition to impact absorption at the time of front impact will be described. FIG. 8 is a conceptual diagram showing another example of the child seat apparatus using the invention. FIG. 8A shows the child seat device, and FIG. 8B is a conceptual diagram showing a state in which the child seat device is attached to the vehicle side seat device.

(Configuration of child seat device)
FIG. 8 shows a child seat device 740. The child seat device 740 differs from the child seat device 700 shown in FIG. 1 in that the drawer belt 704 is directly fixed to the seat portion 701 and the seat belts 709 and 710 are directly fixed to the backrest portion 741. The backrest portion 741 is thinner than the backrest portion 702 shown in FIG. 1, and the inner cylindrical structures of the shock absorbing devices 300a and 300b are attached to the back surface thereof. In the figure, shock absorbers are used in the upper and lower two stages, but in order to ensure mechanical stability, the shocks are also arranged in two rows (that is, a total of four) in the left-right direction (the depth direction in the drawing). Absorber is used.

  The outer cylindrical structures of the shock absorbing devices 300a and 300b are fixed to the back support plate 742. An upper fixing belt 714 with a fastener 715 attached to the tip is attached to the upper part of the back support plate 742. Connectors 743 having openings 743a are attached to the left and right of the lower part of the back surface of the back support plate 742. The structures and roles of the connector 743 and the opening 743a are the same as those of the connector 713 and the opening 713a shown in FIG. The connector 743 and the fastener 715 are an example of an attachment device for detachably attaching the seat device (in this case, the child seat device 740).

  Control wiring from the shock absorbing devices 300a and 300b passes through the backrest 741 and is connected to a control unit 744 disposed in the seat 701. The basic structure and function of the control unit 744 is the same as described with reference to FIG. A reaction force adjustment dial 745 is disposed on the side surface of the seat portion 701. By adjusting the reaction force adjustment dial 745, the reaction force of the impact absorbing devices 300a and 300b using the control unit 744 can be set. This point is the same as in the first and second embodiments.

(Vehicle side seat device)
The seat device 20 on the vehicle side is the same as the seat device 20 shown in FIG.

(Child seat device mounting structure)
The mounting structure of the child seat device 740 to the seat device 20 is basically the same as the case shown in FIG. 7. The pin 24 on the backrest 22 side is engaged, and the fastener 715 is further coupled to the buckle 25. By doing so, the child seat device 740 is fixed to the seat device 20 in a detachable state.

(Shock absorber)
Hereinafter, the detailed structure of the shock absorbers 300a and 300b will be described. FIG. 9 is a conceptual diagram showing another example of the impact absorbing device. FIG. 9 shows an impact absorbing device 300a (300b). The impact absorbing device 300a (300b) includes an inner cylindrical structure 301 and an outer cylindrical structure 302 that accommodates the inner cylindrical structure 301 in a slidable state inside. The inner cylindrical structural body 301 has the same basic structure as the inner cylindrical structural body 201 shown in FIG. 3 (shown on the opposite side of FIG. 3). The inner cylindrical structure 301 is fixed to the backrest 741 in FIG. 8, and the outer cylindrical structure 302 is fixed to the back support plate 742 in FIG.

  The shock absorbing device 300a (300b) shown in FIG. 9 is different from the shock absorbing device 122 of FIG. 3 in the structure of the outer cylindrical structure. That is, the outer cylindrical structure 302 includes a diameter-expanded portion 303 for accommodating the rigid sphere 204, and includes tapered portions 304 and 305 in front and rear in the axial direction, and the tip slides on the inner cylindrical structure 301. It is a cylindrical part that can be accommodated.

  According to this structure, with respect to the outer cylindrical structure 302, the rigid spheres are tapered portions 304 or 305 regardless of whether the inner cylindrical structure 301 moves in the left or right direction in the figure (either forward or backward in the axial direction). The shock absorbing action accompanying the plastic deformation of the outer cylindrical structure described in relation to FIG. 3 is obtained. That is, the impact absorbing device 300a (300b) exhibits an impact absorbing function for both the impact acting in the compression direction and the impact acting in the tension direction.

  The reaction force is set at the time of absorbing the impact in the same manner as shown in FIG. 3. The pulse motor 51 is rotated and the control ring 203 is moved in the axial direction, thereby changing the surface supporting the hard sphere 204. This is done by changing the projecting dimension from the inner cylindrical structure 301.

(Impact absorption function in the child seat device: front impact)
In the state shown in FIG. 8B, it is assumed that a child sits on the child seat device 740 with the seat belts 709 and 710 tightened. In this state, when the vehicle collides forward, the child seat device 740 tries to move forward with the child sitting by inertia. Thereby, a tensile impact force acts on the impact absorbing devices 300a and 300b. That is, the inner cylindrical structure 301 in FIG. 9 is relatively pulled in the left direction in the drawing, and the outer cylindrical structure 302 is relatively pulled in the right direction in the drawing. At this time, the rigid sphere 204 comes into contact with the tapered portion 305, and further relative displacement proceeds, whereby plastic deformation of the outer cylindrical structure 302 by the rigid sphere 204 occurs, and impact absorption is performed. In this way, the impact absorption at the time of the front impact is performed in the impact absorbing devices 300a and 300b, and the damage to the child sitting on the child seat device 740 is reduced.

(Impact absorbing function in the child seat device: rear impact)
In the state shown in FIG. 8B, it is assumed that a child sits on the child seat device 740 with the seat belts 709 and 710 tightened. In this state, when the vehicle has a rear collision (collision of another vehicle after the rear), the child seat device 740 is pushed from the backrest 22 vigorously. This impact applies an axial compression force to the impact absorbing devices 300a and 300b. That is, the inner cylindrical structure 301 in FIG. 9 is relatively pushed in the right direction in the figure, and the outer cylindrical structure 302 is relatively pushed in the left direction in the figure. At this time, the rigid sphere 204 comes into contact with the tapered portion 304, and further relative displacement proceeds, whereby plastic deformation of the outer cylindrical structure 302 by the rigid sphere 204 occurs, and impact absorption is performed. Thus, the impact absorption at the time of the rear impact is performed in the impact absorbing devices 300a and 300b, and the damage to the child sitting on the child seat device 740 is reduced.

(4) Fourth Embodiment In the first to third embodiments, the weight of the child sitting on the child seat device is detected by the weight detection means, and the position of the control ring is adjusted based on the detection result. You can also. Hereinafter, an example of this configuration will be described.

  FIG. 10 is a block diagram of a control system for realizing the present embodiment. FIG. 10 shows a simplified vehicle seat device 10 (see FIG. 2) and child seat device 730 (see FIG. 7). Further, although detailed description is omitted in FIG. 10, in the configuration shown in FIG. 10, the seat device 10 has the configuration shown in FIG. 2, and the child seat device 730 has the configuration shown in FIG.

  FIG. 10 shows two variations. The first variation is an example in which the weight of a child sitting on a child seat is measured on the seat device 10 side, and the impact absorbing device provided in the seat device 10 is set based on the measurement result. The second variation is an example in which the weight of the child sitting on the child seat is measured on the side of the child seat device 730, and the impact absorbing device provided in the child seat device 730 is set based on the measurement result.

(First variation)
First, an example will be described in which the weight of a child sitting on a child seat device is measured on the side of the seat device 10 and the impact absorbing device is set based on the measurement result. In this case, the child seat device attached to the seat device 10 may be the child seat device disclosed in the present specification as long as it corresponds to the mounting structure of the child seat device illustrated in FIGS. It may be a child seat device that is not.

  In this variation, as shown in FIG. 10, a pressure sensor 601 that detects the weight applied to the seating surface of the seat portion 101 is disposed. The pressure sensor 601 outputs a voltage proportional to the pressure applied using the piezoelectric effect. The sensor signal detection circuit 602 converts the output of the pressure sensor 601 into an appropriate digital signal and outputs it to the calculation unit 603.

  The calculation unit 603 refers to the detected weight, the load weight recorded in the memory 604 (weight applied to the seat 101), and data regarding the position of the control ring 203 in the axial direction in FIG. A signal to be determined is output to the motor drive circuit 605. The memory 604 stores data for determining the correlation between the load weight examined in advance and the position of the control ring 203 in FIG. 3, and an operation program for operating the control system shown in the figure. The motor drive circuit 605 sends a drive current to the pulse motor 51 of FIG. 3 and controls its rotation. These control circuit groups are arranged instead of the control unit 723 in FIG.

(Operation of the first variation)
As an example, a case where a child seat device is attached to the seat device 10 will be described as an example. First, in a state where a child seat device (not shown) is attached to the seat device 10, a child is placed on the child seat device. Then, the weight applied to the seat portion 101 is detected by the pressure sensor 601, and is converted into an appropriate electrical signal by the sensor signal detection circuit 602. The output of the sensor signal detection circuit 602 is taken into the calculation unit 603. The calculation unit 603 refers to the data stored in the memory 604, calculates the weight applied to the seat portion 101, and displays the weight in accordance with the calculated position. The control signal is generated so that the third control ring 203 is positioned, and is sent to the motor drive circuit 605.

  Upon receiving this control signal, the motor drive circuit 605 rotates the pulse motors of the impact absorbing devices 122b and 122c shown in FIG. 2, and the position of the control ring of each impact absorbing device corresponds to the weight applied to the seat portion 101. Move to. In this way, the setting of the reaction force value shown in FIG. 5 is adjusted according to the weight of the child sitting on the child seat device (not shown) and the weight of the child seat device (not shown).

(Second variation)
Next, an example will be described in which the weight of a child sitting on a child seat is measured on the side of the child seat device 730 shown in FIG. 7 and the impact absorbing device in the child seat device 730 is set based on the measurement result. In this case, the seat device to which the child seat device 730 is attached may be the seat device disclosed in the present specification as long as it corresponds to the mounting structure of the child seat device illustrated in FIGS. However, a sheet device that is not so may be used.

  In this case, the pressure sensor 606 is disposed on the seating surface of the child seat device 730, and the sensor signal detection circuit 602, the calculation unit 603, and the motor drive circuit 605 are disposed inside the child seat device 730. The operation of each circuit is the same as in the first variation. The motor drive circuit 605 controls the pulse motors of the shock absorbing devices 122a, 122d and 122e shown in FIG. 7, and the control ring of each shock absorbing device is positioned at a position corresponding to the weight of the child sitting on the child seat device 730. The position is adjusted.

(Operation of the second variation)
In the configuration shown in FIG. 10, when a child sits on the child seat device 730, the weight is detected by the pressure sensor 606, and the detection signal is sent from the sensor signal detection circuit 602 to the calculation unit 603. The output of the sensor signal detection circuit 602 is taken into the calculation unit 603. The calculation unit 603 refers to the data stored in the memory 604, calculates the weight applied to the seat portion 701, and controls the position according to the calculated weight. A control signal is generated and sent to the motor drive circuit 605 so that the ring 203 (see FIG. 3) is located.

  Upon receiving this control signal, the motor drive circuit 605 rotates the pulse motors of the shock absorbers 122a, 122d and 122e shown in FIG. 7, and the position of the control ring of each shock absorber corresponds to the weight applied to the seat 701. Move to the specified position. In this way, the setting of the reaction force value shown in FIG. 5 is adjusted according to the weight of the child sitting on the child seat device 730.

(Modification)
Although FIG. 10 illustrates the child seat device 730 of FIG. 7 as the child seat device, it is needless to say that the child seat device of another embodiment can be used instead. In this example, when the weight is measured on the seat device side, the reaction force of the impact absorbing device in the seat device is adjusted, and when the weight is measured on the child seat device side, the shock absorption in the child seat device is adjusted. Although the case where the reaction force of the device is adjusted has been described, the reaction force of the shock absorbing device in both or the other device is determined based on the weight applied to the seating surface measured on one device side through communication between both devices. It can also be set as the structure which adjusts.

(5) Fifth Embodiment In the first to third embodiments, the weight of the seated person is calculated based on the image obtained by imaging the seated person, and the position of the control ring 203 in FIG. 3 is adjusted based on the weight. You can also Hereinafter, an example of this configuration will be described.

  FIG. 11 is a block diagram of a control system for realizing the present embodiment. FIG. 11 shows the seat device 10 shown in FIG. 2 and the child seat device 730 shown in FIG. 7 in a simplified manner. The omission of the description of each sheet device is the same as in the case of FIG.

  In this example, an imaging device 611 that images a child sitting on the child seat device 730 is disposed in front of the seat device 10 or the child seat device 730. The imaging device 611 is installed in a place where a CCD camera is used and does not obstruct driving.

  Image data of an image captured by the imaging device 611 is sent to the image processing circuit 612. The image processing circuit 612 extracts the physique of the child sitting on the child seat device based on the image data, and sends the data to the calculation unit 613. Based on the child's physique information sent from the image processing circuit 612, the physique information recorded in the memory 614, the weight, and the data on the axial position of the control ring 203 in FIG. A signal for determining the position of the control ring 203 is output to the motor drive circuit 615.

  The memory 614 includes table data obtained by examining the relationship between type data (physique information) and body weight for determining the body size of the imaged child and the relationship between the body weight and the position of the control ring 203 in FIG. Stored. These data are created based on the results of investigations performed on a large number of samples in advance. The memory 614 stores an operation program for operating the illustrated control system. The motor drive circuit 615 sends a drive current to the pulse motor 51 of FIG. 3 and controls its rotation. These circuits are arranged on the seat device 10 side and the child seat device 730 side, respectively.

(Operation 1 of the embodiment)
First, an example of the operation on the sheet apparatus 10 side will be described. In this case, the child seat device attached to the seat device 10 may be the child seat device disclosed in the present specification as long as it corresponds to the mounting structure of the child seat device illustrated in FIGS. It may be a child seat device that is not.

  First, in a state where a child seat device (not shown) is attached to the seat portion 101, when a child is seated on the child seat, the imaging device 611 takes an image of the sitting child and sends the image data to the image processing circuit 612. It is done. The image processing circuit 612 performs image processing based on the image data and extracts the physique of the sitting child. For example, this process is performed by dividing a child's physique into a plurality of types, and executing a process of assigning children in the captured image to the types.

  The arithmetic unit 613 receives data (physique information) related to the type of physique output from the image processing circuit 612, and based on the data and data stored in the memory 614, a child sitting on a child seat device (not shown) A weight is calculated, and a control signal is generated so that the control ring 203 in FIG. 3 is located at a position corresponding to the weight, and is sent to the motor drive circuit 615. At this time, the calculation unit 613 moves the control ring 203 in FIG. 3 to the left in FIG. 3 in the case of a physique type that is estimated to be heavy, and the physique that is estimated to be light in weight. In the case of the type, calculation is performed so that the control ring 203 is relatively moved in the right direction in FIG. This calculation is performed in consideration of the weight of the child seat device to be used.

  Upon receiving the control signal from the calculation unit 613, the motor drive circuit 615 controls the rotation of the pulse motor 51, thereby adjusting the position of the control ring 203 shown in FIG. 3 inside the inner cylindrical structure 201. Depending on the position of the control ring 203, the amount of protrusion of the rigid sphere 204 from the inner cylindrical structure 201 when the impact force absorbing action works is adjusted. Thus, the positions of the control rings of the shock absorbing devices 122b and 122c shown in FIG. 2 are adjusted based on the weight of the child sitting on the child seat device attached to the seat 101.

(Operation 2 of the embodiment)
Next, an example of the operation on the child seat device 730 side will be described. In this case, the seat device to which the child seat device 730 is attached may be the seat device disclosed in the present specification as long as it corresponds to the mounting structure of the child seat device illustrated in FIGS. However, a sheet device that is not so may be used.

  When the child seat device 730 is attached to the seat device that satisfies the above-described conditions and a child is seated on the child seat, the image pickup device 611 in FIG. 11 takes an image of the sitting child, and the image data is subjected to image processing. Sent to circuit 612. The image processing circuit 612 performs image processing based on the image data and extracts the physique of the sitting child. For example, this process is performed by dividing a child's physique into a plurality of types, and executing a process of assigning children in the captured image to the types.

  The arithmetic unit 613 receives data (physique information) relating to the type of physique output from the image processing circuit 612, and calculates the weight of the child sitting on the child seat device 730 based on the data and the data stored in the memory 614. The control signal is generated so that the control ring 203 of FIG. 3 is located at a place corresponding to the weight and is sent to the motor drive circuit 615. At this time, the calculation unit 613 moves the control ring 203 in FIG. 3 to the left in FIG. 3 in the case of a physique type that is estimated to be heavy, and the physique that is estimated to be light in weight. In the case of the type, calculation is performed so that the control ring 203 is relatively moved in the right direction in FIG.

  Upon receiving the control signal from the calculation unit 613, the motor drive circuit 615 controls the rotation of the pulse motor 51, thereby adjusting the position of the control ring 203 shown in FIG. 3 inside the inner cylindrical structure 201. Depending on the position of the control ring 203, the amount of protrusion of the rigid sphere 204 from the inner cylindrical structure 201 when the impact force absorbing action works is adjusted. Thus, the positions of the control rings of the impact absorbing devices 122a, 122d, and 122e shown in FIG. 7 are adjusted based on the physique of the child sitting on the child seat device 730.

(6) Sixth Embodiment Another example of an impact absorbing device that includes a displacement portion that is displaced while generating a predetermined force and that can adjust the value of the predetermined force will be described. FIG. 12 is a conceptual diagram showing another example of the impact absorbing device. FIG. 12A shows a cross-sectional structure, and FIGS. 12B and 12C show a state in which some components are viewed from the front.

  FIG. 12 shows an impact absorbing device 640. The shock absorbing device 640 exhibits the same shock absorbing function as the shock absorbing device 122 of FIG. 3 using the viscosity of the fluid. The use of the shock absorbing device 640 is the same as that of the shock absorbing device 122 of FIG. The configuration will be described below.

  An impact absorbing device 640 shown in FIG. 12A includes a cylinder 641 and a piston 642. The cylinder 641 corresponds to the outer cylindrical structure 202 in FIG. 3, and the piston 642 corresponds to the inner cylindrical structure 201. The inside 641a of the cylinder 641 is filled with viscous oil. The piston 642 houses therein a rotatable disk member 643 and a shaft member 644 fixed to the center of the disk member 643. The disc member 643 can be rotated inside the cylinder 642 by rotating the shaft member 644. The shaft member 644 is rotated by a motor (not shown) or manually.

  FIG. 12B shows a state where the piston 642 is viewed from the right direction in FIG. A fan-shaped opening 642 a is formed in the disk portion of the piston 642. FIG. 12C shows a state in which the disc member 643 is viewed from the right direction in FIG. The disk member 643 has an opening 643a having the same shape and the same size as the opening 642a.

  When the shaft member 644 is rotated, the area where the opening 642a and the opening 643a overlap changes. By adjusting the area where the openings overlap, the resistance force caused by the viscous oil generated when the piston 642 is moved relative to the cylinder 641 is adjusted. This resistance force becomes the reaction force shown in FIG.

  That is, in the impact absorbing device 122 shown in FIG. 3, the reaction force value in FIG. 5 is adjusted by adjusting the position of the control ring 203, but in the impact absorbing device 640 shown in FIG. 12, the shaft member 644 is rotated. Then, the reaction force value in FIG. 6 is adjusted by changing the area in which the opening 642a and the opening 643a overlap.

  Viscous oil used as fluid changes in viscosity due to temperature and changes with time, and requires consideration for oil leakage. Therefore, impact absorption stability, manufacturing cost, and reliability are important. Therefore, the impact absorbing device shown in FIG. 3 is superior.

(7) Other Embodiments In the first embodiment, the weight and registration information of a sitting child are input from a control panel (not shown), and the position of the control ring 203 in FIG. 3 is adjusted based on the input information. It is good. Information input at this time can be performed using keyboard input or an IC card.

  Instead of the rigid sphere 204 shown in FIGS. 3 and 6, a bowl-shaped or rugby ball-shaped rigid body may be used. The cross-sectional shape of the inner cylindrical structure 201 and the outer cylindrical structure 202 is not limited to a circle, and may be an ellipse or a polygon.

  As the first member and / or the second member, a plate-shaped member or a curved member may be used instead of the tubular member. In this case, the hard sphere is restrained by the first member, and the protruding amount of the hard sphere from the first member can be adjusted. And when it moves so that a 1st member and a 2nd member may pass each other relatively, it is set as the structure where a hard sphere contacts a 2nd member. In this case, when an impact occurs, the first member and the second member move relative to each other, and the rigid sphere plastically deforms the second member according to the same principle as shown in FIG. At that time, a reaction force against the relative movement is generated. Then, the impact is absorbed by the same principle as shown in FIG.

  The characteristics 401 and 402 in FIG. 5 show a case where the value is substantially constant according to the displacement as a predetermined reaction force generated with the displacement of the inner tubular structure 201 shown in FIG. 4 with respect to the outer tubular structure 202. Has been. However, the reaction force accompanying the displacement can also be set so as to vary according to the displacement. In order to realize this setting, a distribution is provided in the axial direction in which the outer cylindrical cylindrical body 202 is displaced in the hardness and thickness, and the force required for plastic deformation accompanying the penetration of the hard sphere 204 may be varied in the axial direction. . In addition, the same setting can be realized by forming a groove in a portion where the plastic deformation by the rigid sphere 204 in the outer cylindrical cylindrical body 202 may occur, and changing the width and depth in the axial direction. . In addition, the same setting forms a plurality of holes and depressions along a portion of the outer cylindrical cylindrical body 202 where plastic deformation due to the hard sphere 204 may occur, and the diameter, depth, and / or interval is set as an axis. It can also be realized by changing the direction.

  The tapered portion 202b shown in FIG. 3 may have a tapered structure in which the inner diameter changes stepwise instead of a tapered structure in which the inner diameter changes continuously. In the impact absorbing device 122 shown in FIGS. 3, 6, and 9, the reaction force is adjusted by sliding the control ring 203 in the axial direction. On the other hand, the reaction force may be adjusted by rotating the control ring 203. In this case, what is necessary is just to make a control ring into a cam shape so that when the control ring is rotated, the amount of protrusion of the hard sphere from the inner cylindrical structure changes. Further, in the control ring 203 shown in FIG. 3, a V-shaped groove or a U-shaped groove may be formed in the axial direction in a portion that supports the rigid sphere 204, and the rigid sphere 204 may be supported by the groove portion. In the structures shown in FIGS. 3, 6 and 9, the roles of the inner cylindrical structure and the outer cylindrical structure may be reversed. In this case, the hard sphere is constrained by the outer cylindrical structure, and plastic deformation occurs in the inner cylindrical structure due to the hard sphere during the impact absorbing operation.

  In the above-described examples, the example in which the child seat device is detachably attached to the vehicle side seat device has been described. However, the object to which the child seat device is attached is not limited to the seat device, and the vehicle floor or the back of the seat device. It may be a surface formed by moving the part forward. In this case, a mechanism for detachably attaching the child seat device to those surfaces is arranged.

  Further, the child seat device 740 shown in FIG. 8A can be transformed into a child seat device that is fixed to the seat device by using a vehicle seat belt device. In this case, the upper fixing belt 714 and the connector 743 are removed from the back support plate 742. Then, with the back support plate 742 pressed against the backrest portion of the vehicle side seat device, the seat belt provided in the vehicle side seat device is passed between the back support plate 742 and the backrest portion 741, and the child seat device 740 is placed. Fix to the vehicle seat device. This fixing structure is basically the same as the fixing structure of a child seat apparatus using a normal seat belt. In this case, the back support plate 742 functions as an attachment device for detachably attaching the sheet device.

  In the example described above, the example of the fixing structure of the child seat apparatus using the ISOFIX system is given. However, the fixing structure of the child seat apparatus to which the invention can be applied is not limited to the ISOFIX system, and is based on another mechanism. There may be.

  The present invention can be used for a child seat device and a seat device to which the child seat device can be attached.

It is the conceptual diagram (A) seen from the side direction which shows an example of the child seat apparatus attached to the seat apparatus using invention, and the conceptual diagram (B) seen from the front. It is the conceptual diagram (A) which shows the seat apparatus using invention, and the conceptual diagram (B) which shows the state which attached the child seat apparatus of FIG. 1 to this seat apparatus. It is the conceptual diagram (A) which shows an example of an impact-absorbing device, the conceptual diagram (B) which shows the state in the middle of the operation | movement, and the conceptual diagram (C) which shows a modification. It is a block diagram which shows an example of a structure of the control system which adjusts the reaction force at the time of shock absorption. It is a graph which shows the characteristic of an impact-absorbing device. It is a conceptual diagram which shows another example of an impact-absorbing device. It is the conceptual diagram (A) which shows the child seat apparatus using invention, and the conceptual diagram (B) which shows the state attached to the seat apparatus. It is the conceptual diagram (A) which shows the child seat apparatus using invention, and the conceptual diagram (B) which shows the state attached to the seat apparatus. It is a conceptual diagram which shows another example of an impact-absorbing device. It is a block diagram which shows an example of a structure of the control system of embodiment. It is a block diagram which shows an example of a structure of the control system of embodiment. It is side sectional drawing (A) which shows the outline | summary of another example of an impact-absorbing device, and front view (B) and (C) of a part of component.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Seat apparatus, 20 ... Seat apparatus, 21 ... Seat part, 22 ... Backrest part, 23 ... Connector receiving member, 24 ... Pin, 25 ... Buckle, 51 ... Pulse motor, 51a ... Control wiring, 52 ... Spacer, 53 ... Reduction gear, 54 ... Screw rod, 55 ... Convex rail, 57 ... Screw hole, 59 ... Conical member, 59a ... Tapered surface, 101 ... Seat, 102 ... Backrest, 122 ... Shock absorber, 122a-e ... Shock absorption 201: inner cylindrical structure 202: outer cylindrical structure 202a: enlarged diameter part 202b: tapered part 202c: part where plastic deformation has occurred 203: control ring 204: hard sphere 205: hole 213 ... Control ring, 300a ... Shock absorber, 300b ... Shock absorber, 601 ... Pressure sensor, 606 ... Pressure sensor, 700 ... Child 701 ... Seat part, 702 ... Backrest part, 703 ... Cushion material, 704 ... Drawer belt, 705 ... Bifurcated buckle, 705a ... Disengagement button, 706 ... Guide member, 707 ... Fixing bracket, 709 ... Seat belt, 709a ... Fastener, 710 ... Seat belt, 710a ... Fastener, 711 ... Guide, 712 ... Retractor, 713 ... Connector, 713a ... Opening, 714 ... Upper fixing belt, 715 ... Fastener, 716 ... Control wiring, 717 ... Control Unit, 718 ... reaction force adjustment dial, 719 ... connector receiving member, 720 ... fixing bracket, 721 ... pin, 722 ... control wiring, 723 ... control unit, 724 ... reaction force adjustment dial, 725 ... fixing bracket, 726 ... back drawer Belt, 727 ... Buckle, 728 ... Control wiring, 730 ... Child seat device 731 ... reaction force adjustment dial 732 ... control unit, 733 ... connecting fitting, 740 ... child seat device, 741 ... backrest portion, 742 ... rear support plate 743 ... connector 744 ... control unit, 745 ... reaction force adjustment dial.

Claims (11)

An attachment device for detachably attaching the seat device;
An impact absorbing device that includes a displacement portion that is opposed to the mounting device when a force is applied thereto and is displaced while generating a predetermined force, and capable of adjusting a value of the predetermined force;
A fixing device for a detachable seat device, comprising: an adjusting device that adjusts the predetermined force.   The detachable seat device fixing device according to claim 1, wherein the shock absorbing device generates the predetermined force by plastically deforming an object. A detecting means for detecting the weight or the physique of the seated person,
The fixing device for a detachable seat device according to claim 1, wherein the adjustment unit performs the adjustment based on an output of the detection unit. The shock absorber is
A first member;
A rigid body restrained by the first member and protruding from the first member;
A second member movable relative to the first member and capable of contacting the rigid body;
In relative movement of the second member with respect to the first member, the rigid body comes into contact with the second member, and the second member is plastically deformed at a portion of the contact,
The detachable according to any one of claims 1 to 3, wherein the predetermined force value is adjusted by changing a dimension of the rigid body protruding from the first member. Fixing device for mold sheet device. The shock absorber is
A first cylindrical structure and a second cylindrical structure, which are coaxially arranged and capable of relative sliding;
A rigid body that is constrained by the first tubular structure in a state of protruding from the first tubular structure, and that can contact the second tubular structure;
The amount of protrusion of the rigid body from the first tubular structure can be selected from a plurality of stages.
The fixing device for a detachable seat device according to any one of claims 1 to 3, wherein selection from the plurality of stages is performed by the adjusting means. The first tubular structure is positioned relatively inside;
The second cylindrical structure is positioned relatively outside,
The second cylindrical structure has a tapered portion whose inner diameter changes in the axial direction,
The rigid body is a hard sphere and can contact the tapered portion;
The first cylindrical structure has a support portion whose cross-sectional dimension changes stepwise or continuously inside the first cylindrical structure body, and the rigid sphere is placed in the first cylindrical structure body at a part of the support portion. A hard ball support member that supports from the inside of the
The selection from the plurality of stages by the adjusting means is performed by moving the hard ball support member in the axial direction inside the first cylindrical structure to project the hard ball from the first cylindrical structure. 6. The fixing device for a detachable seat device according to claim 5, wherein the fixing device is performed by changing the amount. An attachment device for detachably attaching the seat device;
An impact absorbing device that includes a displacement portion that is displaced while plastically deforming an object when a force is applied to the mounting device; and capable of adjusting the degree of plastic deformation;
A fixing device for a detachable seat device, comprising: an adjusting device that adjusts the degree of deformation.   A detachable seat device comprising the detachable seat device fixing device according to any one of claims 1 to 7.   9. The removable seat device according to claim 8, wherein the attachment device is attached to the rear surface of the removable seat device via the impact absorbing device.   A vehicle seat device comprising the fixing device for a detachable seat device according to any one of claims 1 to 7. The vehicle seat device includes a backrest portion,
The vehicle seat device according to claim 10, wherein a fixing device for the detachable seat device is attached to the backrest portion via the impact absorbing device.

Images