JP2004189097A - Car seat structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a car seat structure capable of hindering the hip of an occupant from making a submarine movement properly without bringing about complication etc. of its constitution. <P>SOLUTION: The car seat structure is configured so that a submarine restricting member 12 is installed in suspension between the front parts 18a of a left and a right swingable supporting arms 18 and secured, and the rear parts 18b of the arms having engaging pins 20 rigidly are coupled interlockingly with an actuator plate 22 rotatable within a range including the dead point of a tensile spring 30 while each engaging pin 20 is inserted in a guide hole 24. It is made possible for the submarine restricting member 12 to be held fast in its after-actuation position when the actuator plate 22 has rotated downward beyond the dead point of the tensile spring 30 interlocking with a movable belt buckle 44. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle seat structure capable of appropriately preventing a submarine movement of a seated person's buttocks caused by a collision or the like, and in particular, a vehicle seat structure in which a movable submarine regulating member is provided in a front portion of a seat cushion. About.
[0002]
[Prior art]
For example, when a vehicle suddenly decelerates or stops, a seated person attempts to move forward under the inertia force. Such a forward inertial movement of the human body is caused by a seat that appropriately restrains the upper body of the seated person. Usually blocked by a belt. However, especially when an excessive forward inertia force occurs at the time of a collision or the like, a butt-slip phenomenon in which the seated part of the occupant moves forward while sinking in the seat cushion, a so-called submarine phenomenon, may occur. Prevention of the submarine phenomenon has been cited as one of the issues in vehicle seats.
[0003]
As a configuration for restricting the forward movement of the occupant's buttocks (submarine movement), as a so-called submarine countermeasure, a regulating member (submarine regulating member) for regulating the forward movement of the buttocks is provided inside the front portion of the seat cushion or the like. It is generally known that However, since the submarine restricting member is required to have rigidity enough to withstand an excessive load (submarine load) during the movement of the submarine, the submarine restricting member is usually seated under a fixed arrangement. There is a possibility that the occupant at the time may feel uncomfortable, uncomfortable, etc. due to the reduced cushioning property.
[0004]
Therefore, as a configuration that does not cause discomfort or the like to the occupant, for example, in a normal state, the submarine regulating member is made to stand by at a lower position, and when a collision or the like occurs, the submarine regulating member is moved on the moving path of the buttocks (on the submarine orbit). ), That is, a so-called movable type.
[0005]
As the movable structure, for example, a structure disclosed in Japanese Patent Application Laid-Open No. 7-81466 in which a submarine regulating member is moved on an upper submarine track by inflation of an airbag serving as a driving member, or a load applied to a seat belt A configuration disclosed in Japanese Patent Application Laid-Open No. 2002-2345, in which a submarine regulating member is moved on an upper submarine orbit in conjunction with a submarine orbit, is known.
[0006]
[Problems to be solved by the invention]
The so-called airbag drive type disclosed in the former Japanese Patent Application Laid-Open No. Hei 7-81466 discloses that a plate material serving as a submarine regulating member is tilted backward by inflation of an airbag accompanying detection of an impact or the like. By lifting and holding the front portion of the seat cushion, the movement of the submarine at the buttocks of the seated occupant is prevented, so that the operation reliability and functionality are sufficiently high. . However, since a sensor for detecting an impact or the like at the time of a collision and a driving means such as an inflator for inflating an airbag are required, an increase in cost due to the complicated configuration is unavoidable. An increase in the weight of the sheet due to the constituent members is inevitable.
[0007]
Furthermore, in the configuration using such an airbag, it is difficult to regenerate the airbag after the operation, and replacement work is required each time. Therefore, in the airbag driven type, the regeneration operation is complicated. It cannot be denied that there will be an increase in the cost of recycling.
[0008]
On the other hand, the so-called seat belt interlocking type disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 2002-2345 uses the pulling of the seat belt by the forward inertial movement of the occupant as a driving source, and the belt by the seat belt is used. Since the submarine regulating member is raised on the submarine track of the buttocks by the traction force of the buckle, when compared with the configuration disclosed in the former JP-A-7-81466, driving means such as an airbag and an inflator are used. In terms of eliminating the need, the cost and weight can be reduced sufficiently. Further, after the impact is calmed down, the submarine regulating member is forcibly returned to its initial position under the biasing force of the return spring or the like, so that the complication of the regenerating operation can be sufficiently prevented.
[0009]
By the way, in the configuration disclosed in JP-A-2002-2345, the seat is slidably supported on its mounting base such as a seat slide device, and the seat is slid forward with respect to this mounting base. The submarine regulating member is moved upward.
[0010]
Therefore, the configuration itself is inevitably increased in size, and the configuration is liable to be complicated.
[0011]
Since the seat itself is moved, the seat is located forward of the seating position before the occurrence of the impact during the operation. That is, since the driver may approach the steering wheel, instrument panel, and the like located in front of the seat by himself / herself, in some cases, it cannot be denied that the safety is poor.
[0012]
Further, in this configuration, since the forward movement of the seat during normal operation must be regulated, the seat is moved to the initial position under a strong urging force corresponding to an excessive forward inertia force at the time of a collision or the like. It is easy to predict the momentum and retention. Then, when the forward inertial force acting on the seat is weakened, the seat is forcibly returned to the initial position under this urging force, but assuming that this urging force is strong, the seat is moved to the initial position. Since it is easy to imagine the occurrence of a secondary impact at the time of return of the vehicle, the reduction of safety in such a point cannot be denied in this known configuration.
[0013]
In addition, in this known configuration, since the elevation of the submarine regulating member is merely linked to the forward movement of the seat, when the inertial force acting on the seat weakens, the submarine regulating member is naturally returned downward. Become. In other words, even if the submarine regulating member rises momentarily under the movement of the submarine at the buttocks bottom, the continuation of the ascending position depends on the forward inertial force of the occupant. Depending on the state of transmission, it is undeniable that the movement of the submarine restricting member may not be sufficiently restricted.
[0014]
An object of the present invention is to provide a vehicle seat structure capable of appropriately preventing the submarine movement of the buttocks of the occupant without complicating the configuration.
[0015]
[Means for Solving the Problems]
In order to achieve this object, in the vehicle seat structure according to the first aspect of the present invention, the submarine regulating member extending in the width direction of the seat cushion extends between the lower standby position and the upper post-operation position. The rear arm of the support arm, which is movably mounted between the forearms of a pair of left and right swingable support arms pivotally mounted at the intermediate position, is fixed, and has an integral engagement pin. The end base is pivotally connected to a rotatable operating plate, which is pivotally mounted, with an engaging pin inserted into a corresponding guide hole provided at a front end thereof.
[0016]
Further, the urging force of the tension spring is applied to the operation plate, and the rotation range of the operation plate is defined by the upper limit stopper and the lower limit stopper as a range including the dead point of the tension spring. The upper and lower urging forces can be distributed around the dead point, and the seat belt member that can be towed by the excessive forward inertia force at the time of the collision matches the standby position of the submarine regulating member. The operation plate at the upper movement limit position is connected to the corresponding movable member via a predetermined connection means so that the operation plate can be pulled in the direction of the lower rotation limit position.
[0017]
Then, when the seat belt member is pulled under the forward inertia force and the operating plate interlocked with the seat belt member is rotated downward beyond the dead point of the tension spring, the swing of the supporting arm causes the submarine to rotate. The restricting member is moved to the post-operation position where the movement of the submarine of the occupant's buttocks can be restricted, and the engagement and holding of the engagement pin by the post-operation holding portion defined in the guide hole allows the submarine restricting member to be moved. , And can be fixedly locked and held in a position after the operation.
[0018]
According to a second aspect of the present invention, the guide hole of the operation plate is generally formed as a meandering elongated hole in which the engagement pin is movable, and the end of the hole is provided with the submarine regulating member in the standby position. , And a post-operation holding unit that holds the submarine regulating member at its post-operation position. Then, the standby position holding unit guarantees a deviation of the rotation trajectory between the operation plate and the support arm, thereby rotating the operation plate downward from the rotation upper limit position and swinging the support arm accordingly. On the other hand, the post-operation holding portion utilizes the deviation of the rotation trajectory to allow the operation plate to rotate upward from the rotation lower limit position, and It is defined and formed in a shape that can regulate the swing of the supporting arm that accompanies it.
[0019]
Further, according to a third aspect of the present invention, there is provided a tension coil spring which is installed and stretched between the operating plate and a predetermined locking piece disposed at a position rearward of the rear end pivot point of the operating plate. The dead point is defined closer to the rotation upper limit position than the rotation upper limit position and the intermediate position between the rotation lower limit position.
[0020]
According to a fourth aspect of the present invention, the seat belt member is urged and held to its initial position under the urging force of the return spring, and the movable member interlocked with the rotation of the operation plate is provided with the seat belt member. As a connecting means for operatively connecting the cable arm, a flexible cable wire capable of moving integrally with the seat belt member is used, and as a movable member to which the cable wire is connected, a support member is provided. An arm engagement pin is utilized.
[0021]
A corresponding end of the cable wire is connected to an engaging pin of the rear arm of the support arm via a connecting tool, and the connecting tool allows the engaging pin to slide inside the connecting pin. It is formed as a longitudinal ring with holes.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0023]
As shown in FIGS. 1 and 2, in a vehicle seat structure 10 according to the present invention, a submarine regulating member 12 that can prevent a submarine movement of a seated person's buttocks is movably provided inside a front portion of a seat cushion 14. Is established.
[0024]
Since the shape and structure of the seat cushion 14 provided inside the submarine regulating member 12 are not particularly limited, detailed description of the shape and structure of the seat cushion is omitted here. I do. If it is forcible, it is desirable that the seat cushion 14 has a configuration in which a pan frame or the like in which a base plate 16 described later is easily fixed is used as a seat cushion frame.
[0025]
For example, a pair of left and right base plates 16 are erected and fixed to a seat cushion frame (not shown) at left and right separated positions. In the present invention, the submarine regulating member 12 extending in the width direction of the seat cushion 14 is erected and fixed between the forearms 18a of a pair of left and right swingable support arms 18 pivotally mounted at an intermediate position. In addition, a rear arm 18b of the support arm integrally having an engaging pin 20 is provided with a corresponding guide hole formed at the front end of a rotatable operating plate 22 pivotally mounted at the rear end base. It is connected so as to be able to interlock under the insertion arrangement of the engaging pin to 24.
[0026]
The support arm 18 is pivotally connected to the base plate 16 by a pivot pin 26, and the operating plate 22 is disposed at a corresponding position, that is, at a rear position with respect to the support arm as shown in FIG. Due to 28, it is pivotally connected to the same base plate.
[0027]
A biasing force from a tension spring 30 is applied to the operation plate 22. Under the urging force of the tension spring 30, the operation plate 22 is rotatable in a clockwise direction and a counterclockwise direction, respectively.
[0028]
As the tension spring 30, for example, a locking pin 32 protruding from the operation plate 22 and a pivot point at the rear end base of the operation plate, that is, a locking piece disposed at a position rearward of the pivot pin 28, for example, A tension coil spring installed or stretched between the locking pin 34 can be exemplified.
[0029]
In the present invention, the rotation range of the operation plate 22 is defined as a range including a dead point of the tension spring (tensile coil spring) 30 that applies a biasing force in the rotation direction to the operation plate. And the lower limit stopper 38.
[0030]
Here, the dead point of the tension spring 30 will be described.
[0031]
Here, the dead point of the tension spring 30 is defined as an axis of the tension spring on an assumed line 40 connecting the pivot pin 28 which is a pivot point of the operation plate 22 and the locking pin 32 of the tension spring on the operation plate. In the state shown in FIG. 1 where the tension spring is located substantially above the dead point, the urging force of the tension spring applies the urging force of the tension spring to the working plate in the clockwise direction (substantially upward in the figure). In the state shown in FIG. 2 having an axis of the tension spring substantially below the dead point, the urging force of the tension spring moves the operating plate counterclockwise (substantially downward in the figure). It acts as a biasing force.
[0032]
That is, in this configuration, it is possible to apply the urging force in each rotation direction to the operating plate 22 by the single tension spring 30, and the distribution of the urging direction makes the operating plate become the urging force. By rotating in opposition, it is automatically made at the dead point.
[0033]
The upper limit stopper 36 and the lower limit stopper 38 need only have a shape and configuration that can engage with the operation plate 22. For example, a cut-and-raised piece formed by partially raising and lowering the base plate 16 may be used. , And a simple configuration of the lower limit stopper.
[0034]
Further, it is desirable that the dead point of the tension spring 30 be defined closer to the rotation upper limit position of the operation plate 22.
[0035]
By the way, as described above, in the present invention, the operating plate 22 to which the urging force from the tension spring 30 is applied is connected via the combination of the guide hole 24 of the operating plate and the engaging pin 20 of the rear arm. , And the supporting arm 18.
[0036]
Here, in the present invention, the rotation upper limit position of the operation plate 22 defined by the upper limit stopper 36 is a standby corresponding position for holding the submarine regulating member 12 of the support arm forearm at a lower standby position (see FIG. 1). The rotation lower limit position defined by the lower limit stopper 38 is defined as a post-operation corresponding position for holding the submarine regulating member at the upper post-operation position (see FIG. 2). The guide holes 24 of the operation plate are formed so that the positions of the support arm 18 and the submarine regulating member 12 can be defined at each corresponding position.
[0037]
In addition, the standby position of the submarine regulating member 12 here is a position of the submarine regulating member in a normal state that does not give a rigid sensation to the occupant. This is a so-called regulation position in which the seated person's buttocks are aligned with the submarine trajectory that will move forward.
[0038]
The guide hole 24 of the operation plate is roughly formed as a meandering elongated hole capable of moving inside the engagement pin 20, and its hole ends 24 a and 24 b engage with the standby position of the submarine regulating member 12. The pin 20, that is, a standby position holding portion that holds the support arm 18, and a post-operation holding portion that holds the support arm (engaging pin) at the post-operation position of the submarine regulating member are respectively defined. The standby position holding portion 24a ensures that the rotation trajectory between the operation plate 22 and the support arm 18 is displaced, thereby lowering the operation plate from the upper rotation limit position and supporting arm Is defined and formed into a shape that can guarantee the rocking of the operation plate. On the other hand, the post-operation holding portion 24b utilizes the displacement of the rotation trajectory so that the holding portion 24b is located above the operation plate from the rotation lower limit position. It is defined and formed in a shape that can restrict the rotation and the swing of the supporting arm accompanying the rotation.
[0039]
As can be seen from FIG. 1, when the operation plate 22 is at the upper rotation limit position, the submarine restriction member 12 is moved to the standby position by the movement restriction of the engaging pin 20 to the standby position holding portion 24 a of the guide hole. Will be retained. If the operating plate 22 is forcibly rotated downward from its upper rotation limit position against a biasing force of the tension spring 30 by a specific external force to be described later, the engagement pin in the guide hole 24 is stopped. Under the movement of 20, the swing of the support arm 18 and the rotation of the operating plate 22 are both guaranteed.
[0040]
Here, the actuation plate 22 is rotated against the urging force of the extension spring 30 until the actuation plate exceeds the dead point of the extension spring downward. When the operating plate 22 exceeds the dead point of the tension spring 30, the urging force from the tension spring acts as a force for urging the operating plate downward. The plate is rotated with the swing of the support arm 18 to the rotation lower limit position where the rotation is restricted by the lower limit stopper 38.
[0041]
As shown in FIG. 2, the operating plate 22 is urged and held at its lower rotation limit position under engagement with the lower limit stopper 38. When the operation plate 22 is located at the lower rotation limit position, the engagement pin 20 of the support arm is engaged with the holding portion 24b after the operation of the guide hole, and the movement of the support pin 18 is restricted by the movement of the support arm 18, that is, the submarine restriction member 12. Is fixedly held in position after its activation.
[0042]
Here, in the present invention, as an external force for forcibly rotating the operation plate 22 below the rotation upper limit position, in the present invention, a component (seat) of a seat belt that restricts forward movement of a seated person in an emergency such as a collision. The force (forward inertia force) from the belt member) is used. In the embodiment of the present invention, a buckle (belt buckle) 44 to which a tongue (not shown) of a seat belt is attached is exemplified as the seat belt member.
[0043]
The belt buckle (seat belt member) 44 is connected and supported via a pivot pin 48 to an upper piece 46a of a substantially L-shaped rotatable link 46, and is supported by a return spring 50 provided to the link. Is biased and held at its initial position, for example, the lower limit position regulated by the lower limit stopper 52.
[0044]
The fulcrum of the link 46 is defined by a pivot pin 54, for example. Then, for example, a torsion spring wound around the pivot pin 54 is used as a return spring 50, and each end of the return spring is locked to the pivot pin 48 of the belt buckle and a predetermined locking piece 56. The urging force of the belt buckle 44 in the initial position direction can be applied to the link 46.
[0045]
The link 46 is, for example, pivotally attached to a side frame or the like disposed on the left and right sides of the seat cushion 14, and sets the lower limit stopper 52, the locking piece 56, and the rotation upper limit position of the link. An upper limit stopper 58 to be described later is integrally formed on the side frame or the like.
[0046]
The belt buckle 44 is operably connected to a movable member that is interlocked with the rotation of the operation plate 22 via a connecting unit 60, for example.
[0047]
As the connecting means 60, for example, a flexible cable wire that can move integrally with the belt buckle 44 can be used. One end 60a of this cable wire (connection means) 60 is connected and pivotally connected to the lower piece 46b of the link 46 by screwing or the like, and the other end 60b of this cable wire is connected to the operating plate. It is connected to an interlocking member, for example, the engaging pin 20 of the support arm, via a connecting member 62 so as to be able to interlock in the towing direction.
[0048]
Each end of the cable wire 60 is fixed to the side frame, the base plate 16 and the like via a bracket 64.
[0049]
In this embodiment, the connecting member 62 is embodied, for example, as a longitudinal ring having an elongated hole 66 that allows the engagement pin 20 to slide therein. As shown in FIG. 1, the longitudinal ring (connecting tool) 62 is hooked on the engaging pin 20 so that the engaging pin 20 at the rotation upper limit position of the operation plate 22 can be pulled downward.
[0050]
The position shown by the solid line in FIG. 1 is the initial position of the belt buckle 44 urged and held under the urging force from the return spring 50, and in the normal state of the sheet where the submarine regulating member 12 is at the standby position. Since the operating plate 22 is urged and held at the rotation upper limit position, the upper portion of the hooking piece 62 is in a state of being hooked on the engaging pin as shown in the figure.
[0051]
Note that the urging force of the return spring 50 is required to be a force that sufficiently withstands the forward inertia force during normal stopping, such as sudden stop or sudden acceleration during normal running. In other words, the urging force of the return spring 50 is set as a force that enables the belt buckle 44 to move only when an excessive forward inertia force generated in an emergency such as a collision occurs.
[0052]
For example, in the event of an emergency such as a collision, if the seat belt and, consequently, the belt buckle 44 are pulled obliquely upward and forward as indicated by the arrow under the inertial forward movement of the seated person, the link 46 accompanying this is rotated. Thus, the engagement pin 20 and the operation plate 22 are pulled downward.
[0053]
The urging force from the tension spring 30 applied to the operation plate 22 is sufficient as long as the operation plate can be held at the upper rotation limit position and the lower rotation limit position, respectively. Usually, it is set sufficiently smaller than the biasing force of the return spring 50 for 44. In other words, if there is an excessive forward inertia force that pulls the belt buckle 44 against the urging force of the return spring 50, the operating plate 22 is urged downward against the urging force of the tension spring 30. .
[0054]
When the operation plate 22 pivots downward with the movement of the belt buckle 44 and the rotational position exceeds the dead point of the extension spring 30 below, the operation plate receives the downward biasing force of the extension spring. Thus, the submarine regulating member 12 regulates the forward movement of the buttocks of the occupant under the self-rotation of the operating plate, independently of the pulling by the belt buckle. It is forcibly moved to its post-actuation position (regulation position) where it is possible (see FIG. 2).
[0055]
In other words, the movement range (stroke) of the belt buckle 44 in the present invention is sufficient from the rotation upper limit position of the operation plate 22 to a position below the dead point of the tension spring 30 and the position of the belt buckle indicated by a solid line in FIG. As can be seen by comparing the position with the position indicated by the alternate long and short dash line, the stroke can be kept sufficiently small.
[0056]
Note that the stroke of the belt buckle 44 is defined under the rotation restriction on the link 46 by the lower limit stopper 56 and the upper limit stopper 58 described above.
[0057]
In this way, the submarine regulating member 12 moved to the regulation position in conjunction with the pulling of the belt buckle 44 is fixedly held under the movement of the engaging pin 20 by the holding portion 24b after the operation of the guide hole 24. Therefore, by the movement restriction by the fixed submarine restriction member, the forward movement of the seated person's buttocks, that is, the movement of the submarine can be reliably prevented.
[0058]
As described above, in the vehicle seat structure 10 of the present invention, the interlocking operation plate 22 and the support arm 18 are disposed and supported so as to be rotatable and swingable within an appropriate range within the seat cushion. It is sufficient that the rotation or the swing is linked with the movement of the belt buckle 44 by the cable wire 60, so that the configuration is sufficiently suppressed from being complicated.
[0059]
And since it is the structure which restricts and prevents the submarine movement of the seated person's buttocks only by the movement of the submarine restriction member 12 without sliding the seat cushion 14 forward, the enlargement can also be sufficiently prevented.
[0060]
Furthermore, since the configuration is such that the submarine regulating member 12 is fixedly held at the post-operation position, even if the traction force from the occupant to the belt buckle 44 is weakened, the submarine regulation member is at the post-operation position, that is, the regulation position. Fixedly left. Therefore, it is possible to sufficiently cope with a secondary forward movement of only the buttocks without pulling of the belt buckle 44, for example, rebound.
[0061]
In addition, since the seat cushion 14 is not slid forward, the submarine movement of the buttocks of the occupant can be restricted without changing the front and rear positions of the seat cushion itself. That is, the occupant himself can be prevented from approaching the steering, instrument panel and the like in front of the seat more than necessary, so that the safety is further improved in this respect.
[0062]
In the present invention, since the urging force of the single tension spring 30 is divided and used as the upper urging force and the lower urging force by using the dead point, the configuration is complicated also in this point. Can be reliably prevented.
[0063]
Further, in the present invention, the submarine regulating member 12 is in its post-operation position (regulation position) under the biasing force of the tension spring 30 applied to the operation plate 22 and the shape of the holding portion 24b of the guide hole after operation. The submarine regulating member can be returned from the post-operation position to the standby position by forcibly moving the operation plate upward against the urging force of the tension spring. In other words, even when the submarine regulating member 12 is fixedly held at the position after the operation, the guide hole 24 is formed in the shape of this embodiment, so that the regeneration operation can be simplified. It becomes possible.
[0064]
As described above, the vehicle seat structure 10 of the present invention is excellent in functionality and operation performance despite its simple configuration. Therefore, it can be said that the vehicle seat structure 10 of the present invention is excellent in practicality.
[0065]
Here, in the embodiment of the present invention, the corresponding end 60b of the cable wire is connected to the engaging pin 20 via the longitudinal ring 62, which operates independently of the stroke of the belt buckle 44. Since this is a measure for moving the plate 22, for example, in a configuration in which the stroke of the belt buckle is made to coincide with the entire rotation range from the upper rotation limit position of the operation plate to the lower rotation limit position thereof, The corresponding end of the cable wire may be directly connected to the engaging pin or the actuation plate without using a long longitudinal ring.
[0066]
However, in the present invention in which the operation plate 22 is rotated under the urging force of the tension spring 30, it is sufficient to rotate the operation plate downward to a position below the dead point of the tension spring, and the belt buckle The stroke of 44 may be any position as long as it is below the dead point of the tension spring. According to the configuration of this embodiment, the stroke of the belt buckle can be sufficiently suppressed.
[0067]
If the stroke of the belt buckle 44 is suppressed in this manner, the seat belt does not extend more than necessary when the forward inertia force is applied, that is, the seated person does not move excessively forward. Safety is further improved.
[0068]
Furthermore, even if the seat belt is extended by a corresponding amount due to the movement of the belt buckle 44, the amount of this configuration is slightly smaller than that in the case where the entire rotation range of the operation plate 22 is matched. Although the urging force of the return spring 50 for the belt buckle 44 is relatively large, the amount of the belt buckle returned under this urging force is sufficiently small, so that the secondary force given to the seated person is reduced. Since the impact is sufficiently suppressed, the safety can be ensured sufficiently high from this point as well.
[0069]
In the embodiment of the present invention, the belt buckle 44 is returned to its initial position under the urging force of the return spring 50. According to such a configuration, even if the seat belt is once stretched under the movement of the belt buckle 44, the position of the belt buckle is instantly returned to the initial position, and the holding force at the initial position is maintained. Is the urging force of the return spring 50, so that the initial state of the seat belt that can sufficiently cope with rebound or the like can be smoothly ensured. Therefore, also in this respect, the safety is further improved.
[0070]
Further, in the embodiment of the present invention, the belt buckle 44 is supported by the link 46. However, the belt buckle is not limited to this, because it is sufficient if the belt buckle can be moved under traction by the seat belt. Instead, for example, a configuration may be adopted in which a linear movement is supported by a guide rail or the like without using a link or the like.
[0071]
However, if the link 46 as in this embodiment is used, the amount of movement of the belt buckle 44 can be easily amplified and transmitted to the corresponding end 60a of the cable wire, that is, to the operating plate 22. Such a configuration can be said to be effective in suppressing the movement amount of the belt buckle.
[0072]
Further, in this embodiment, the cable wire 60 is exemplified as the connecting means. However, the movement of the belt buckle 44 is transmitted to the operation plate 22 to be linked therewith, and is not limited thereto.
[0073]
Further, in the present embodiment, the belt buckle 44 is illustrated as the seat belt member, but any other member that is towed by the forward inertial movement of the occupant is sufficient. It may be used as a seat belt member. However, considering that the belt buckle 44 is generally provided integrally with the rear end of the seat cushion 14 or the like, the belt buckle 44 can be used without complicating the configuration and the like. It can be said that it is high.
[0074]
Further, in this embodiment, a tension coil spring is exemplified as the tension spring 30. However, it is sufficient that the actuation plate 22 can be provided with the rotational urging force while defining the dead point. Instead, another tension type spring member may be used as the tension spring.
[0075]
However, if a tension coil spring is used as the tension spring 30, it is possible to sufficiently apply an appropriate urging force to the operation plate 22 despite its simple configuration, and a clear definition of the dead point is also provided. It is easily possible.
[0076]
Here, in this embodiment, the dead point of the tension spring 30 is defined closer to the rotation upper limit position in the entire rotation range of the operation plate 22. According to such a configuration, the amount of rotation of the operation plate 22 from the upper rotation limit position to the dead point is sufficiently suppressed, so that the amount of movement of the belt buckle 44 required for movement of the submarine regulating member 12 is also reduced in this respect. It can be sufficiently suppressed.
[0077]
The embodiments described above are for explaining the present invention, and do not limit the present invention in any way, and all modifications and alterations within the technical scope of the present invention are included in the present invention. Needless to say.
[0078]
【The invention's effect】
As described above, according to the vehicle seat structure according to the present invention, the interlocking operation plate and the support arm are arranged and supported so as to be pivotable and swingable within an appropriate range within the seat cushion, It is sufficient that these rotations or swings are linked to the movement of the seat belt member by the connecting means, so that the configuration is not sufficiently complicated and the size thereof can be sufficiently prevented.
[0079]
Since the submarine regulating member is fixedly held at the post-operation position, even if the traction force from the occupant to the seat belt member is weakened, the submarine regulating member is fixed at the post-operation position, that is, the regulation position. Is left. Therefore, according to the present invention, it is possible to easily provide a submarine countermeasure that can sufficiently cope with the secondary movement of the buttocks of the seated person.
[0080]
Further, since the seat cushion does not slide forward, it is possible to sufficiently prevent the occupant from approaching the steering, instrument panel, and the like in front of the seat more than necessary. Therefore, the safety is further improved.
[0081]
In addition, since the urging force of a single tension spring is distributed and used as an upper urging force and a lower urging force by using the dead point, it is possible to reliably prevent the configuration from being complicated even in this point. It becomes.
[0082]
Further, under the biasing force of the tension spring applied to the operation plate and the shape of the guide hole in which the engaging pin is inserted and arranged, the submarine regulating member is only fixedly held at the post-operation position. By forcibly moving the operation plate upward against the urging force of the tension spring, the submarine regulating member can be returned from the post-operation position to the standby position. That is, even if the submarine regulating member is fixedly held at the post-operation position, the regeneration operation can be sufficiently simplified.
[0083]
As described above, the vehicle seat structure of the present invention is excellent in functionality and operation performance despite its simple configuration. Therefore, it can be said that the vehicle seat structure of the present invention is excellent in practicality.
[0084]
According to the configuration of the second aspect of the present invention, since the shape of the guide hole is clearly embodied, the operation of the engagement pin at each position of the operation plate can be properly obtained.
[0085]
Further, according to the third aspect of the present invention, it is possible to sufficiently apply an appropriate urging force to the operation plate despite the simple configuration, and it is also easy to clearly define the dead point. Becomes possible.
[0086]
And, by defining the dead point of the tension spring near the rotation upper limit position of the entire rotation range of the operation plate, the rotation amount of the operation plate from the rotation upper limit position to the dead point is sufficiently suppressed. In addition, the amount of movement of the seat belt member required for moving the submarine regulating member can be sufficiently suppressed.
[0087]
Further, according to the configuration of claim 4 of the present invention, the stroke of the seat belt member required for moving the submarine regulating member can be sufficiently suppressed. If the stroke of the seatbelt member is suppressed, the seatbelt does not extend more than necessary when the inertia force is applied, that is, the occupant does not move forward excessively. The performance is further improved.
[0088]
Further, since the seat belt member is returned to the initial position under the urging force of the return spring, it is possible to sufficiently cope with rebound and the like, and in this respect, its safety is further improved.
[Brief description of the drawings]
FIG. 1 is a schematic side view of a vehicle seat structure according to the present invention before operation.
FIG. 2 is a schematic side view of the vehicle seat structure after operation.
[Explanation of symbols]
10 Vehicle seat structure
12 Submarine regulation members
18 Support arm
20 Engagement pin
22 Working plate
24 Guide holes
30 Tension spring (Tension coil spring)
44 Belt buckle (seat belt member)

Claims (4)

In the vehicle seat structure in which a submarine regulating member is installed inside the front of the seat cushion,
A submarine regulating member extending in the left-right width direction of the seat cushion is movable between a lower standby position and an upper post-operation position. A rear arm of the support arm, which is erected and fixed between the forearms and integrally has an engagement pin, is provided at the front end of a rotatable operating plate pivotally attached to the rear end base. It is connected to be able to interlock under the insertion arrangement of the engaging pin into the corresponding guide hole,
The urging force of the tension spring is applied to the operation plate, and the rotation range of the operation plate is defined by the upper limit stopper and the lower limit stopper as a range including the dead point of the tension spring. The upper limit of the rotation that the seat belt member that can be distributed around the dead point as the urging force and the lower urging force and that can be towed by excessive forward inertia force at the time of collision matches the standby position of the submarine regulating member The operation plate at the position can be pulled in the direction of the lower rotation limit position, and connected to the corresponding movable member via a predetermined connection means so as to be interlocked,
When the seatbelt member is pulled under the forward inertial force and the operating plate interlocking with the seatbelt member is rotated downward beyond the dead point of the tension spring, the swing of the supporting arm causes the submarine regulating member. Is moved to the post-operation position where the movement of the submarine of the seated occupant can be restricted, and the submarine restriction member is moved by engaging and holding the engagement pin by the post-operation holding portion defined in the guide hole. A vehicle seat structure characterized in that it can be fixedly locked and held at a position after operation. The guide hole of the operation plate is formed as a meandering elongated hole in which the engagement pin is movable, and the end of the hole has a standby position holding portion that holds the submarine restriction member at the standby position, and a submarine restriction. A post-actuation holding part for holding the member in its post-actuation position,
The standby position holding section guarantees a deviation of the rotation trajectory between the operation plate and the support arm, thereby guaranteeing downward rotation of the operation plate from the rotation upper limit position and swinging of the support arm accompanying the rotation. In addition to being defined and formed in a shape that allows the operation plate, the post-operation holding portion utilizes the deviation of the rotation locus, thereby causing the operation plate to rotate upward from the rotation lower limit position and to accompany this. 2. The vehicle seat structure according to claim 1, wherein the vehicle seat structure is defined and formed in a shape capable of restricting the swing of the support arm. The tension spring is a tension coil spring that is stretched and stretched between the operating plate and a predetermined locking piece disposed at a position rearward of the rear end base of the operating plate. The vehicle seat structure according to claim 1, wherein the vehicle seat structure is defined closer to the rotation upper limit position than an intermediate position between the movement upper limit position and the rotation lower limit position. The seat belt member is urged and held at its initial position under the urging force of the return spring,
As a connecting means for connecting the seat belt member to a movable member interlocked with the rotation of the operation plate, a flexible cable wire capable of moving integrally with the seat belt member is used, and a flexible cable is used. As a movable member to which the wire is connected, an engagement pin of the rear arm of the support arm is used,
The corresponding end of the cable wire is connected to the engaging pin of the rear arm of the support arm via a connecting tool, and the connecting tool has an elongated hole that allows the engaging pin to slide inside the connecting pin. The vehicle seat structure according to any one of claims 1 to 3, wherein the vehicle seat structure is formed as a longitudinal ring.

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