JP2005274540A - Seat displacement measuring device, and automotive seat device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve such problems that an initial reference position is not stabilized, and enhancement in performance is difficult. <P>SOLUTION: This measuring device comprises a positioning means for returning and positioning a load receiving member 8 to an initial reference position in no load. Consequently, the initial reference positions of the seat displacement measuring devices 61, 62 and 63 are stabilized. The seat displacement measuring devices 61, 62 and 62 including the positioning means for returning and positioning the load receiving member 8 to the initial reference position in no load are used. Consequently, in this automotive seat device 1, occupant determination performance can be stabilized. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a seat displacement measuring device that measures the displacement of a seat due to the seating of an occupant in order to appropriately perform, for example, vehicle airbag deployment control and seat belt winding control. In addition, the present invention provides a vehicle for determining a seated occupant based on the displacement of a seat measured by a seat displacement measuring device, for example, in order to appropriately perform airbag airbag deployment control and seat belt winding control. The present invention relates to a sheet apparatus.

  This type of seat displacement measuring apparatus and automobile seat apparatus are conventionally known (for example, Patent Document 1). Hereinafter, the seat displacement measuring device and the automobile seat device will be described. In addition, the code | symbol with a parenthesis respond | corresponds to patent document 1. FIG. The seat displacement measuring device includes a load receiving portion (2) that receives and displaces a passenger's load due to seating via the seat seating portion (1a), and the load receiving portion (2) via springs (4a to 4f). A holding seat frame (3), a displacement sensor (5a-5d) disposed between the load receiving portion (2) and the seat frame (3) for detecting the displacement of the load receiving portion (2); , Is made up of.

  In addition, the automobile seat device includes a seat seating portion (1a) and a backrest portion. The seat seating portion (1a) includes a seat cushion member (cushion pad) on which an occupant sits, a seat frame (3) for attaching the seat cushion member to a vehicle floor panel (not shown), and a seat by the occupant seating. The seat displacement measuring device that measures the displacement of the vehicle, and an occupant discrimination ECU (11) that inputs a seat displacement measurement signal from the seat displacement measurement device and discriminates the seated occupant and outputs an occupant discrimination signal. It is what you have.

  Hereinafter, the operation of the sheet displacement measuring apparatus will be described. When the occupant is seated on the seat seating portion (1a), the load of the seated occupant is applied to the load receiving portion (2) via the seat seating portion (1a), and the load receiving portion (2) receiving this load is the seat frame. (3) Displacement via springs (4a to 4f). The displacement sensors (5a to 5d) detect the displacement of the load receiving portion (2) and output a seat displacement measurement signal (that is, a detection signal) to the occupant determination ECU (11). Based on the displacement of the seat measured by the seat displacement measuring apparatus, for example, the development control of the airbag of the automobile and the winding control of the seat belt are appropriately performed.

  The operation of the automobile seat device using the seat displacement measuring device will be described. When the occupant discrimination ECU (11) receives the seat displacement measurement signal from the seat displacement measuring device, the occupant seated on the seat seating portion (1a) is discriminated based on the seat displacement measurement signal, and the discrimination result is obtained. It is output to the ECU (12) for airbag as a discrimination signal. Thereby, for example, the development control of the airbag of the automobile and the winding control of the seat belt are appropriately performed.

  The seat displacement measuring device uses a mat type weight sensor, a strain gauge type weight sensor, and a bladder type weight sensor, and compares it with an occupant weight measuring device that measures the weight of an occupant seated on a seat. The cost is low, the durability is excellent, and high measurement accuracy can be obtained. In addition, the vehicle seat device using the seat displacement measuring device determines the seated occupant based on the displacement of the seat measured with high accuracy by the seat displacement measuring device. Air bag deployment control and seat belt winding control can be performed more appropriately. Furthermore, since the said vehicle seat apparatus hold | maintains the load receiving part (2) to the seat frame (3) via the spring (4a-4f), it is comfortable to sit.

  However, the seat displacement measuring device detects displacement of the load receiving portion (2) held by the seat frame (3) via the springs (4a to 4f) by the displacement sensors (5a to 5d). . For this reason, the seat displacement measuring device has a problem that the output from the displacement sensors (5a to 5d) is not stable when the occupant is not seated on the seat seating portion (1a), that is, when there is no load. .

  As shown in FIG. 8, almost no vertical load is applied to the load receiving portion (2) when no load is applied (see FIG. 8A). For this reason, the initial reference position of the load receiving portion (2) (when no load is applied) due to hysteresis of the seat cushion member of the seat seating portion (1a), friction between the seat cushion member and the seat frame (3), and the like. That is, the position of the load receiving portion (2) when the occupant is not seated on the load receiving portion (2), referred to as “initial reference position” in this specification and claims, is not stable. It is. As a result, the output values from the displacement sensors (5a to 5d) before and after the occupant sits on the seat seating portion (1a) are different. Since the initial reference position is not stable, for example, it may affect the setting of the belt warning threshold voltage at the initial reference position. FIG. 8 is an explanatory view showing the operation of the conventional sheet displacement measuring apparatus. FIG. 8A is an explanatory diagram showing the state of the load receiving portion (2) and the springs (4a to 4f) when there is no load (initial reference position). In this state, the vertical load components of the springs (4a to 4f) are almost “0” (vertical load component≈0). FIG. 8B is an explanatory diagram showing the state of the load receiving portion (2) and the springs (4a to 4f) when a load is applied (when an occupant is seated on the seat seating portion (1a)). In this state, the vertical load component of the springs (4a to 4f) is “large”.

  Moreover, since the said seat displacement measuring apparatus in which the said vehicle seat apparatus uses the said seat displacement measuring apparatus whose initial reference position is not stabilized, it may affect the stabilization of performance.

JP 2004-58837 A

  The problems to be solved by the present invention are that the initial reference position is not stable in the conventional seat displacement measuring device, and the performance is stabilized in the conventional automobile seat device using the conventional seat displacement measuring device. It is in the point that it affects.

  The present invention is characterized by comprising positioning means for returning and positioning the load receiving member to the initial reference position when there is no load.

  Further, the present invention uses a sheet displacement measuring device comprising positioning means for returning and positioning the load receiving member to the initial reference position when there is no load.

  The seat displacement measuring apparatus according to the present invention comprises positioning means for returning the load receiving member to the initial reference position when no load is applied, thereby stabilizing the initial reference position.

  In addition, the automobile seat device of the present invention can be improved in performance by using a seat displacement measuring device comprising positioning means for returning the load receiving member to the initial reference position when no load is applied.

  Hereinafter, three examples of the embodiment of the seat displacement measuring apparatus according to the present invention and one example of the embodiment of the automobile seat apparatus according to the present invention will be described in detail with reference to FIGS. Note that the present invention is not limited to the embodiments.

  Hereinafter, configurations of the seat displacement measuring apparatus and the automobile seat apparatus according to the first embodiment will be described with reference to FIGS. 1-3, the code | symbol F shows the front side seeing from a passenger | crew. Symbol B indicates the rear side as viewed from the passenger. The symbol L indicates the left side when viewed from the passenger. The symbol R indicates the right side when viewed from the passenger. The symbol U indicates the upper side when viewed from the passenger. Reference sign D indicates the lower side when viewed from the passenger.

  In FIG. 3, reference numeral 1 denotes an automobile seat device according to the first embodiment. The automobile seat device 1 includes a seating portion 2 and a backrest portion 3. The seat 2 includes a seat cushion member 4 (seat cushion pad) on which an occupant (not shown) sits, a seat frame 5 that attaches the seat cushion member 4 to a floor panel (not shown) of an automobile, The seat displacement measuring device 61 according to the first embodiment that measures the displacement of the seat due to the seating, and the seat displacement measurement signal from the seat displacement measuring device 61 are input to discriminate the seated occupant and output the occupant discrimination signal. And an occupant discrimination device 7.

  The seat displacement measuring device 61 includes a load receiving member 8 (flat mat, spring structure) that receives and displaces a passenger's load due to sitting through the seat cushion member 4, and a holding spring 9 (holding). A seat frame 5 serving as a holding member that is held via a spring), a displacement sensor 10 that is disposed between the load receiving member 8 and the seat frame 5 and detects the displacement of the load receiving member 8; And positioning means for returning the load receiving member 8 that is displaced at the time of loading to an initial reference position.

  The seat frame 5 has a frame structure in which four sides are surrounded by side plates 11. In addition, the load receiving member 8 has, for example, a spring structure if the spring wires are formed in a face shape by assembling in a comb shape (lattice shape). Both end portions of the holding spring 9 are attached to the left and right side plates 11 of the seat frame 5 and the left and right outer frames 12 of the load receiving member 8, respectively. As a result, the load receiving member 8 is held by the seat frame 5 via the holding spring 9. That is, the load receiving member 8 is suspended from the side plate 11 of the seat frame 5 through the holding spring 9. In this example, a total of eight holding springs 9 are used, four on each side.

  In this example, the displacement sensor 10 is a contact type rotary variable resistance displacement sensor. As shown in FIGS. 1 and 2, the displacement sensor 10 includes a main body 13 fixed to the left and right side plates 11 of the seat frame 5, and a pulley 14 rotatably attached to the main body 13 via a rotation shaft. It consists of One end of a wire 15 (connection member) is wound around the pulley 14. The other end of the wire 15 is attached to the left and right outer frames 12 of the weight receiving member 8. A return spring (not shown) is built in the main body 13. As a result, the wire 15 is always wound around the pulley 14 by the spring force of the return spring. The displacement sensor 10 replaces the amount of displacement of the rotation angle of the rotating shaft with the amount of change in the resistance value of a resistor (not shown) built in the main body 13. In this example, four displacement sensors 10 are used.

  As shown in FIGS. 1 and 2, the positioning means is provided between the load receiving member 8 and the seat frame 5, and returns the load receiving member 8 to the initial reference position when there is no load. A spring and stoppers 16 and 17 are provided on the load receiving member 8 and the seat frame 5 respectively, and abut against each other when there is no load to position the load receiving member 8 at an initial reference position. ing.

  The return spring also serves as the holding spring 9. As shown in FIG. 1, the return spring (hereinafter referred to as “holding spring 9”) that is also used as the holding spring 9 is configured so that the seat frame 5 is positioned when the load receiving member 8 is positioned at the initial reference position when there is no load. One end attached to the load receiving member 8 is located on the upper side U with respect to the other end attached to the load receiving member 8. As a result, the holding spring 9 is acted upon by a spring force that further pulls the load receiving member 8 upward U (arrow U) even when the load receiving member 8 is positioned at the initial reference position when there is no load.

  Of the stoppers, the upper U stopper 16 is a side plate 11 of the seat frame 5, and is fixed at a location D below the location where one end of the holding spring 9 is attached. On the other hand, one end of the stopper D on the lower side D of the stoppers is fixed to the outer frame 12 of the load receiving member 8. The side plate 11 of the seat frame 5 is provided with a slit 18 (long hole) on the lower side D from the lower surface of the upper U stopper 16. The other end of the lower D stopper 17 is inserted into the slit 18 so as to be slidable in the vertical direction. As a result, the lower surface of the upper U stopper 16 and the upper surface of the lower D stopper 17 face each other. When no load is applied, the load receiving member 8 is pulled up to the upper side U by the return spring force of the holding spring 9, and the lower surface of the upper U stopper 16 and the lower D stopper 17. The upper surfaces abut against each other, and the load receiving member 8 is positioned at the initial reference position. The position of the upper end surface of the slit 18 is located on the lower surface of the upper U stopper 16, while the position of the lower end surface of the slit 18 is lower when the load receiving member 8 is displaced to the maximum. It is located on the lower side D of the lower surface of the stopper 17 on the side D (see FIG. 2). Thereby, the displacement of the load receiving member 8 is not hindered by the contact between the lower surface of the lower D stopper 17 and the lower end surface of the slit 18.

  As shown in FIG. 4, the occupant discrimination device 7 is composed of, for example, an occupant discrimination ECU. The occupant discrimination device 7 is connected to each of the four displacement sensors 10 of the seat displacement measuring device 61 and an airbag operation control device 19 (A / B ECU). The occupant discrimination device 7 receives seat displacement measurement signals from the four displacement sensors 10 of the seat displacement measurement device 61 to discriminate a seated occupant and outputs an occupant discrimination signal to the airbag operation control device 19. Is. Thereby, the expansion control of the airbag of the automobile is appropriately performed. The determination of the occupant of the occupant determination device 7 is, for example, to determine an adult (female adult) and a child.

  The seat portion 2 of the automobile seat device 1 receives the load (weight) of the occupant with the seat cushion member 4 and the load receiving member 8 in order to improve the riding comfort. The seat cushion member 4 is placed on the seat frame 5 and supported by the load receiving member 8.

  The seat displacement measuring device 61 and the automobile seat device 1 according to the first embodiment are configured as described above, and the operation thereof will be described below. When there is no load, that is, when the occupant is not seated on the seat 2 of the vehicle seat device 1, the seat displacement measuring device 61 is in the state shown in FIG. That is, due to the spring force of the holding spring 9, the load receiving member 8 is pulled up to the upper side U, and the lower D stopper 17 integrated with the load receiving member 8 is also lifted to the upper side U, so that the upper U stopper 16 And the upper surface of the lower D stopper 17 are in contact with each other. As a result, the load receiving member 8 is positioned at the initial reference position by the positioning means constituted by the holding spring 9 also serving as the return spring and the stoppers 16 and 17. At this time, the values at the initial reference position are output from the four displacement sensors 10 of the sheet displacement measuring device 61.

  Here, when the occupant sits on the seat portion 2 of the vehicle seat device 1, the load of the seated occupant is applied to the seat cushion member 4 and the load receiving member 8. That is, as shown in FIG. 2, the seat cushion member 4 sinks to the lower side D (arrow D) due to the load of the occupant, and a load is applied to the load receiving member 8 in conjunction therewith. As a result, the load receiving member 8 Is held by the seat frame 5 and is elastically deformed to extend. As the holding spring 9 is extended, the load receiving member 8 sinks to the lower side D (arrow D) with respect to the seat frame 5 and is displaced. The sinking amount, that is, the displacement amount of the load receiving member 8 is replaced with the rotation angle displacement amount of the rotation shaft of the displacement sensor 10 via the wire 15 and the pulley 14, and the resistance value in the main body 13 of the displacement sensor 10. It is replaced with the amount of change. Thus, the displacement amount of the load receiving member 8 is measured as a change in the resistance value of the displacement sensor 10, and the occupant's load (weight) is detected based on the change. When the load receiving member 8 sinks, the lower D stopper 17 integrated with the load receiving member 8 sinks together with the load receiving member 8.

  In the seat displacement measuring device 61 according to the first embodiment, when the displacement of the seat due to the seating of the occupant is measured by the four displacement sensors 10, the seat displacement measurement signal is transmitted to the four displacement sensors 10 of the seat displacement measuring device 61. Is input to the occupant discrimination device 7. The occupant discrimination device 7 discriminates the occupant seated on the seat 2 of the vehicle seat device 1 based on the input seat displacement measurement signal. The occupant discrimination device 7 outputs the discrimination result to the airbag operation control device 19 as an occupant discrimination signal. Thereby, the expansion control of the airbag of the automobile is appropriately performed.

  Next, when the occupant seated on the seating portion 2 of the vehicle seat device 1 is separated from the seating portion 2, the load applied to the seat cushion member 4 and the load receiving member 8 is lost, and the vehicle becomes unloaded. For this reason, the elastically deformable holding spring 9 is restored to its original state by the spring force, and the seat cushion member 4 and the load receiving member 8 which have been sunk into the lower side D and displaced are shown in FIG. Return to the original state. That is, the load receiving member 8 is pulled up to the upper side U by the spring force of the holding spring 9, and the lower D stopper 17 integrated with the load receiving member 8 is also lifted to the upper side U, so that the upper U stopper 16 And the upper surface of the lower D stopper 17 are in contact with each other. As a result, the load receiving member 8 is positioned at the initial reference position by the positioning means constituted by the holding spring 9 also serving as the return spring and the stoppers 16 and 17. On the other hand, the load receiving member 8 has a spring force of the holding spring 9 that tries to pull the load receiving member 8 upward U (arrow U), that is, a holding spring that makes the stoppers 16 and 17 contact each other. 9 spring force is always acting. As a result, the displaced load receiving member 8 can be reliably returned to the initial reference position and positioned.

  At this time, since the spring force of the holding spring 9 that always acts on the load receiving member 8 is large, the load receiving member 8 does not move up and down with respect to the initial reference position with a small force. For this reason, the values at the initial reference position output from the four displacement sensors 10 are stabilized.

  The seat displacement measuring device 61 and the vehicle seat device 1 according to the first embodiment are configured and operated as described above, and the effects thereof will be described below. The sheet displacement measuring apparatus 61 according to the first embodiment includes a positioning unit that returns and positions the load receiving member 8 to the initial reference position when there is no load, thereby stabilizing the initial reference position. By stabilizing the initial reference position, it becomes easy to provide a belt warning threshold voltage at the initial reference position.

  In particular, the seat displacement measuring device 61 according to the first embodiment uses positioning means composed of a return spring that also serves as the holding spring 9 and stoppers 16 and 17, so that as shown in FIG. In this case, the holding spring 9 acts to raise the load receiving member 8 upward U (arrow U), while the stoppers 16 and 17 abut against each other to position the load receiving member 8 at the initial reference position. . As a result, the sheet displacement measuring device 61 according to the first embodiment abuts against the spring force of the holding spring 9 that tries to lift the load receiving member 8 upward U (arrow U), that is, the stoppers 16 and 17 are brought into contact with each other. Since the spring force of the holding spring 9 to be applied is constantly acting on the load receiving member 8, the initial reference position is reliably stabilized.

  In addition, since the sheet displacement measuring apparatus 61 according to the first embodiment uses the stoppers 16 and 17 as positioning means, the load receiving member 8 is set to the initial reference by the physical action of the stoppers 16 and 17 contacting each other. Therefore, the initial reference position can be more reliably stabilized.

  Further, the automobile seat device 1 according to the first embodiment is provided with positioning means for returning and positioning the load receiving member 8 to the initial reference position when there is no load, in this example, a return spring and a stopper 16 also serving as the holding spring 9. , 17 is used, and a sheet displacement measuring device 61 comprising positioning means is used. As a result, in the vehicle seat device 1 according to the first embodiment, the initial reference position of the seat displacement measuring device 61 is reliably stabilized, so that the performance of occupant discrimination can be stabilized.

  Hereinafter, the sheet displacement measuring apparatus according to the second embodiment will be described with reference to FIGS. 5 and 6. In the figure, the same reference numerals as those in FIGS. 1 to 4 denote the same components.

  The sheet displacement measuring apparatus 62 according to the second embodiment uses positioning means having a configuration different from that of the positioning means used in the sheet displacement measuring apparatus 61 according to the first embodiment. The positioning means of the sheet displacement measuring device 62 according to the second embodiment uses a balance spring 20 instead of the stoppers 16 and 17 of the positioning means used in the sheet displacement measuring device 61 according to the first embodiment.

  Both ends of the balance spring 20 are respectively attached to the left and right side plates 11 of the seat frame 5 and the left and right outer frames 12 of the load receiving member 8. As shown in FIG. 5, one end of the balance spring 20 attached to the seat frame 5 is attached to the load receiving member 8 when the load receiving member 8 is positioned at the initial reference position when there is no load. And the other end of the holding spring 9 attached to the seat frame 5 and the weight receiving member 8, respectively. As a result, the balance spring 20 positions the load receiving member 8 at the initial reference position where the spring force is balanced with the spring force of the holding spring 9 and returns to the initial reference position by the action of the holding spring 9 when no load is applied. Is.

  Since the seat displacement measuring device 62 according to the second embodiment is configured as described above, the operation and effect similar to those of the seat displacement measuring device 61 according to the first embodiment, that is, the initial reference position is stable. To do. Further, if the seat displacement measuring device 62 according to the second embodiment is used in an automobile seat device, the automobile seat device using the seat displacement measuring device 62 according to the second embodiment is applied to the first embodiment. Almost the same effect as the automobile seat device 1 using the seat displacement measuring device 61, that is, the performance of occupant discrimination can be stabilized.

  In particular, the seat displacement measuring device 62 according to the second embodiment uses the balance spring 20 in place of the stoppers 16 and 17 as positioning means. Therefore, the load receiving member is caused by the balance action of the balance spring 20 with the holding spring 9. When the 8 is positioned at the initial reference position, there is no contact sound of the stoppers 16 and 17 and it is quiet.

  Hereinafter, the sheet displacement measuring apparatus according to the third embodiment will be described with reference to FIG. In the figure, the same reference numerals as those in FIGS. 1 to 6 denote the same components.

  The sheet displacement measuring apparatus 63 according to the third embodiment uses positioning means having a configuration different from that of the positioning means used in the sheet displacement measuring apparatuses 61 and 62 according to the first and second embodiments. The positioning means of the sheet displacement measuring device 63 according to the third embodiment is configured such that the wire 15 and the main body 13 of the displacement sensor 10 are used instead of the balance spring 20 of the positioning means used in the sheet displacement measuring device 62 according to the second embodiment. Use the built-in return spring.

  As shown in FIG. 7, the wire 15 of the displacement sensor 10 has one end wound around the pulley 14 of the displacement sensor 10 when the load receiving member 8 is positioned at the initial reference position when there is no load. The other end attached to the receiving member 8 and the lower end D of the holding spring 9 respectively attached to the seat frame 5 and the weight receiving member 8 are provided. Yes. As a result, the return spring of the displacement sensor 10 receives the load receiving force that the spring force balances with the spring force of the holding spring 9 via the wire 15 and returns to the initial reference position by the action of the holding spring 9 when no load is applied. The member 8 is positioned at the initial reference position.

  Since the sheet displacement measuring device 63 according to the third embodiment is configured as described above, the operation and effect substantially the same as the operation and effect of the sheet displacement measuring devices 61 and 62 according to the first and second embodiments, that is, the initial stage. The reference position is stable. Further, if the seat displacement measuring device 63 according to the third embodiment is used in an automobile seat device, the automobile seat device using the seat displacement measuring device 63 according to the third embodiment is the same as the first and second embodiments. Accordingly, it is possible to stabilize substantially the same function and effect as those of the vehicle seat device 1 using the seat displacement measuring devices 61 and 62, that is, occupant discrimination performance.

  In particular, the seat displacement measuring device 63 according to the third embodiment uses the wire 15 and return spring of the displacement sensor 10 instead of the stoppers 16 and 17 and the balance spring 20 as positioning means. When the load receiving member 8 is positioned at the initial reference position due to the balance action, there is no contact sound of the stoppers 16 and 17, and the balance spring 20 is unnecessary, and the number of parts is reduced accordingly. The manufacturing cost can be reduced.

  Hereinafter, examples other than Examples 1, 2, and 3 will be described. In the seat displacement measuring devices 61, 62, and 63 according to the first, second, and third embodiments and the automobile seat device 1 according to the first embodiment, the load receiving member 8 and the holding spring 9 are attached to the seat frame 5 as the holding member. An example in which the displacement sensor 10 and positioning means (such as the stoppers 16 and 17 or the balance spring 20) are directly incorporated will be described. However, in the present invention, a panel separate from the seat frame 5 is used as a holding member, and a load receiving member 8, a holding spring 9, a displacement sensor 10 and positioning means (such as stoppers 16 and 17 or a balance spring 20) are used on this panel. May be incorporated to modularize the sheet displacement measuring device. Also, the panel of the module structure and the pan type cushion frame are used together, and the load receiving member 8, the holding spring 9, the displacement sensor 10 and the positioning means (the stoppers 16, 17 or the balance spring 20, etc.) are attached to the pan cushion frame. ) May be incorporated to make the sheet displacement measuring device a semi-module.

  Further, in the seat displacement measuring devices 61, 62, and 63 according to the first, second, and third embodiments and the automobile seat device 1 according to the first embodiment, a contact type rotary variable resistance displacement sensor 10 is used. To do. However, in the present invention, a displacement sensor other than the displacement sensor 10 described above, for example, a non-contact type rotary or linear capacitive displacement sensor, a non-contact type rotary or linear magnetic flux density change type, and the like. A displacement sensor, a contact type linear variable resistance displacement sensor, or the like may be used.

  Further, in the seat displacement measuring devices 61, 62, 63 according to the first, second, and third embodiments and the automobile seat device 1 according to the first embodiment, the displacement sensor 10 is connected to the left and right side plates 11 of the seat frame 5 and the load. A total of four pieces are arranged between the right and left outer frames 12 of the receiving member 8, two on the left and right. However, in the present invention, the location and the number of displacement sensors are not particularly limited.

  Furthermore, in the seat displacement measuring devices 61, 62, 63 according to the first, second, and third embodiments and the automobile seat device 1 according to the first embodiment, the holding spring 9 that also serves as the return spring is provided on the seat frame 5. A total of 8 pieces are arranged between the left and right side plates 11 and the left and right outer frames 12 of the load receiving member 8. However, in the present invention, the location and number of the holding springs 9 are not particularly limited. Further, in the seat displacement measuring apparatus 62 according to the second embodiment, the holding springs 9 that are also used as the return springs and the balancing springs 20 are alternately arranged (staggered), but this arrangement is not particularly limited.

  Furthermore, in the seat displacement measuring devices 61 and 62 according to the first and second embodiments and the automobile seat device 1 according to the first embodiment, the displacement sensor 10 is located below the load receiving member 8 in the maximum displacement state D. The displacement sensor 10 detects the amount of contraction of the distance between the displacement sensor 10 and the load receiving member 8 as the displacement amount of the load receiving member 8. However, in the present invention, the displacement sensor 10 is positioned at the same position as the load receiving member 8 in the no-load state or at an upper side U than the load receiving member 8 so that the distance between the displacement sensor 10 and the load receiving member 8 is increased. May be detected by the displacement sensor 10 as the amount of displacement of the load receiving member 8.

  Furthermore, in the vehicle seat device 1 according to the first embodiment, the occupant discrimination device 7 (occupant discrimination ECU) is connected to the airbag operation control device 19 (A / B ECU). However, in the present invention, the passenger discriminating device 7 may be connected to the seat winding control device so as to appropriately perform the seat belt winding control of the automobile. Further, in the present invention, the occupant discrimination device 7 is connected to the airbag operation control device 19 and the seat winding control device so as to appropriately perform the airbag airbag deployment control and the seat belt winding control. good.

BRIEF DESCRIPTION OF THE DRAWINGS It is Example 1 of the seat displacement measuring apparatus concerning this invention, and Example 1 of the vehicle seat apparatus, and is a partial cross section figure of the main components at the time of no load. Similarly, it is a partial cross-sectional view showing the main components when the occupant is seated on the seat. Similarly, it is a disassembled perspective view which shows main components. Similarly, it is a block diagram showing a displacement sensor, an occupant discrimination device, and an airbag operation control device. FIG. 7 is a partial cross-sectional view of main components when there is no load, showing Embodiment 2 of the sheet displacement measuring apparatus according to the present invention. Similarly, it is a partial cross-sectional view showing the main components when the occupant is seated on the seat. FIG. 7 is a partial cross-sectional view of main components when there is no load, showing Embodiment 3 of the seat displacement measuring apparatus according to the present invention. It is explanatory drawing which shows the effect | action of the conventional sheet displacement measuring apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat apparatus for motor vehicles 2 Seating part 3 Backrest 4 Seat cushion member 5 Seat frame 61, 62, 63 Seat displacement measuring device 7 Passenger discrimination device 8 Load receiving member 9 Holding spring (return spring)
DESCRIPTION OF SYMBOLS 10 Displacement sensor 11 Side plate 12 Outer frame 13 Main body 14 Pulley 15 Wire 16 Upper stopper 17 Lower stopper 18 Slit 19 Airbag operation control device 20 Balance spring F Front side B Rear side L Left side R Right side U Upper side D Lower side

Claims (8)

In the seat displacement measuring device that measures the displacement of the seat due to the seating of the occupant,
A load receiving member that receives and displaces an occupant's load due to sitting through the seat cushion member;
A holding member for holding the load receiving member via a holding spring;
A displacement sensor disposed between the load receiving member and the holding member to detect displacement of the load receiving member;
Positioning means for returning and positioning the load receiving member to the initial reference position when there is no load;
A sheet displacement measuring device comprising: The positioning means includes
A return spring that is provided between the load receiving member and the holding member and returns the load receiving member to an initial reference position when no load is applied;
A stopper that is provided on each of the load receiving member and the holding member, and abuts each other when there is no load to position the load receiving member at an initial reference position;
The sheet displacement measuring device according to claim 1, comprising: The positioning means includes
A return spring that is provided between the load receiving member and the holding member and returns the load receiving member to an initial reference position when no load is applied;
A balance spring that is provided between the load receiving member and the holding member, and in which a spring force is balanced with a spring force of the return spring when no load is applied, and the load receiving member is positioned at an initial reference position;
The sheet displacement measuring device according to claim 1, comprising: The positioning means includes
A return spring that is provided between the load receiving member and the holding member and returns the load receiving member to an initial reference position when no load is applied;
The displacement sensor fixed to the holding member;
A connecting member stretched between the load receiving member and the displacement sensor;
A return spring built in the displacement sensor, wherein the spring force is balanced with the spring force of the return spring via the connecting member when there is no load, and the load receiving member is positioned at an initial reference position;
The sheet displacement measuring device according to claim 1, comprising: In an automobile seat device for determining a seated occupant based on a seat displacement measured by a seat displacement measuring device,
It consists of a seating part and a backrest part,
The seating portion is
A seat cushion member on which an occupant sits;
A seat frame for attaching the seat cushion member to an automobile floor panel;
The seat displacement measuring device for measuring the displacement of the seat due to the seating of the occupant;
An occupant determination device that inputs a seat displacement measurement signal from the seat displacement measurement device and determines an occupant seated and outputs an occupant determination signal;
Have
The sheet displacement measuring device is
A load receiving member that receives and displaces an occupant's load due to sitting through the seat cushion member;
A holding member for holding the load receiving member via a holding spring;
A displacement sensor disposed between the load receiving member and the holding member to detect displacement of the load receiving member;
Positioning means for returning and positioning the load receiving member to the initial reference position when there is no load;
An automobile seat device comprising: The positioning means includes
A return spring that is provided between the load receiving member and the holding member and returns the load receiving member to an initial reference position when no load is applied;
A stopper that is provided on each of the load receiving member and the holding member, and abuts each other when there is no load to position the load receiving member at an initial reference position;
The vehicle seat device according to claim 5, comprising: The positioning means includes
A return spring that is provided between the load receiving member and the holding member and returns the load receiving member to an initial reference position when no load is applied;
A balance spring that is provided between the load receiving member and the holding member, and in which a spring force is balanced with a spring force of the return spring when no load is applied, and the load receiving member is positioned at an initial reference position;
The vehicle seat device according to claim 5, comprising: The positioning means includes
A return spring that is provided between the load receiving member and the holding member and returns the load receiving member to an initial reference position when no load is applied;
The displacement sensor fixed to the holding member;
A connecting member stretched between the load receiving member and the displacement sensor;
A return spring built in the displacement sensor, wherein the spring force is balanced with the spring force of the return spring via the connecting member when there is no load, and the load receiving member is positioned at an initial reference position;
The vehicle seat device according to claim 5, comprising:

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