JP7156994B2 - vehicle seat - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat, and more particularly to a vehicle seat that has a function of reducing the impact applied to a passenger in a rear-end collision.

In order to protect the occupant in the event of a rear-end collision, a part of the seat back frame or a part of the reclining device of the vehicle seat absorbs the impact applied to the occupant in the event of a rear-end collision. A structure is provided for this.

As a structure for absorbing such impact, for example, Patent Document 1 (Japanese Patent Application Laid-Open No. 10-230767) discloses that a side wall of a main frame of a seat back is provided with a weakened strength portion to receive impact force when rear-ended. A configuration is described in which buckling deformation of the main frame occurs at this strength weakened portion when the main frame is bent.

Further, Patent Document 2 (Japanese Unexamined Patent Application Publication No. 2005-186670) describes a configuration in which a plurality of shock absorbing holes are formed in a side frame inner connecting a frame on the seat back side and a reclining adjuster.

Furthermore, in Patent Document 3 (Japanese Patent Application Laid-Open No. 2015-40001), a portion where a resin frame on the seat back side and a metal bracket are connected using rivets is provided along the inner peripheral surface in the circumferential direction. An arrangement using a metal collar forming a hat with a cavity is described.

JP-A-10-230767 JP-A-2005-186670 JP 2015-40001

Providing a function to mitigate the impact applied to the passenger in the event of a rear-end collision (impact mitigation function in the event of a rear-end collision) is an important configuration for protecting the passenger. It is not preferable to increase the manufacturing cost of the sheet for printing.

From the viewpoint of reducing manufacturing costs, it is possible to reduce the number of parts by integrally molding the resin frame on the seat back side and the metal bracket, and then configure the part that has a shock mitigation function in the event of a rear-end collision. desirable.

However, in the configuration in which the side wall of the main frame of the seatback is provided with a weakened strength portion as described in Patent Documents 1 to 3, the portion having the impact mitigation function at the time of rear-end collision is configured by reducing the number of parts. not taken into consideration.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems of the prior art, and to provide a vehicle seat that can be constructed by reducing the number of parts for a portion having a shock mitigating function in the event of a rear-end collision.

In order to solve the above-described problems, the present invention provides a vehicle seat having a seat cushion and a seat back, wherein the seat back is a resin seat back frame and integrally molded with the resin seat back frame. and a metal bracket for attaching the seatback frame made of resin to another member, and the metal bracket has a plurality of holes having different diameters arranged in order of diameter, and is formed in the metal bracket. The insides of the plurality of holes having different diameters were filled with the same resin material as the seat back frame made of resin.

Further, in order to solve the above-described problems, the present invention provides a vehicle seat having a seat cushion and a seat back, wherein the seat back includes a seat back frame made of resin, and a seat back frame made of resin. a surface for attaching to other members, a front surface formed at right angles to the surface for attaching to other members ahead of the surface for attaching to other members, and a front surface formed at right angles to the surface for attaching to other members It has a seat back frame made of resin and a metal bracket integrally formed with a rear surface formed at right angles to the surface for attaching to another member on the rear side, and the front surface of the metal bracket has a A plurality of holes with decreasing diameters are formed on the rear surface of the metal bracket, and a plurality of holes with increasing diameters are formed on the front surface of the metal bracket. The plurality of holes and the plurality of holes formed on the rear surface of the metal bracket were filled with the same resin material as the seat back frame made of resin.

Furthermore, in order to solve the above-described problems, the present invention provides a vehicle seat having a seat cushion and a seat back, wherein the seat back includes a resin seat back frame integrated with the resin seat back frame. It has a molded metal bracket for attaching the resin seat back frame to another member, and on the side where a pulling force is generated in the resin seat back frame when the seat back receives an impact load in the rear direction. A metal bracket integrally molded with a resin seatback frame has a plurality of holes that decrease in diameter with increasing distance from the position where the seatback receives a rearward impact load. On the side where a compressive force is generated on the resin seat back frame when receiving an impact load, a metal bracket integrally molded with the resin seat back frame causes the seat back to move backward as it moves away from the position where the impact load is received. a plurality of holes having a diameter that increases with increasing distance from the position of the metal bracket receiving the impact load and a plurality of holes having a diameter that increases with distance from the position receiving the impact load The inside is filled with the same resin material as the seat back frame made of resin.

Furthermore, in order to solve the above-described problems, the present invention provides a vehicle seat having a seat cushion and a seat back, wherein the seat back includes a resin seat back frame and a and a metal bracket that is insert-molded to attach the resin seatback frame to another member. were arranged in order of the size of the outer diameter.

ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to reduce the number of parts and to comprise the part provided with the shock-absorbing function at the time of a rear-end collision, and can reduce the manufacturing cost of a vehicle seat.

In addition, according to the present invention, the fixed portion of the integrally molded seat back frame and the metal bracket is configured to have a shock absorbing function in the event of a rear-end collision. It is designed to be lightweight.

Furthermore, according to the present invention, since the metal bracket and the seatback frame are integrally molded with a plurality of through-holes having different diameters formed in the metal bracket, the bonding strength between the metal bracket and the seatback frame is guaranteed. can now be done easily.

1 is a perspective view showing the appearance of a vehicle seat according to Embodiment 1 of the present invention; FIG. 1 is a perspective view showing a configuration of a frame of a seat back of a vehicle seat according to Embodiment 1 of the present invention; FIG. 1 is a side view of a frame of a seat back of a vehicle seat according to Embodiment 1 of the present invention; FIG. 1 is a perspective view showing a configuration of a metal bracket that connects a seatback frame and a recliner of a vehicle seat according to Embodiment 1 of the present invention; FIG. FIG. 4 is a side view of a metal bracket that connects the frame of the seatback of the vehicle seat and the recliner according to the first embodiment of the present invention. FIG. 4 is a cross-sectional view taken along the line AA in FIG. 3 showing the state of connection between the frame of the seat back of the vehicle seat and the metal bracket according to the first embodiment of the present invention; FIG. 4 is a cross-sectional view taken along the line BB in FIG. 3 showing the state of connection between the frame of the seat back of the vehicle seat and the metal bracket according to the first embodiment of the present invention; 4 is a graph showing the relationship between stress and strain generated in a resin member at the connection between the frame of the seatback of the vehicle seat and the metal bracket according to Example 1 of the present invention. FIG. 4 is a cross-sectional view showing a first cross-sectional shape of a resin member in connection between a frame of a seatback of a vehicle seat and a metal bracket according to a modification of Embodiment 1 of the present invention; FIG. 5 is a cross-sectional view showing a second cross-sectional shape of a resin member in connection between a frame of a seatback of a vehicle seat and a metal bracket according to a modification of Embodiment 1 of the present invention; FIG. 10 is a cross-sectional view showing a third cross-sectional shape of the resin member at the connection between the frame of the seatback of the vehicle seat and the metal bracket according to the modification of the first embodiment of the present invention; FIG. 10 is a cross-sectional view showing a fourth cross-sectional shape of the resin member at the connection between the frame of the seatback of the vehicle seat and the metal bracket according to the modified example of the first embodiment of the present invention; FIG. 10 is a cross-sectional view showing a fifth cross-sectional shape of the resin member in connection between the frame of the seatback of the vehicle seat and the metal bracket according to the modified example of the first embodiment of the present invention; FIG. 7 is a perspective view showing the configuration of a metal bracket that connects the frame of the seatback of the vehicle seat and the recliner according to the second embodiment of the present invention. FIG. 15 is a side view of the metal bracket that connects the frame of the seatback of the vehicle seat and the recliner according to the second embodiment of the present invention, viewed from the DD direction in FIG. 14; FIG. 11 is a perspective view showing the configuration of a metal bracket that connects the frame of the seatback of the vehicle seat and the recliner according to the third embodiment of the present invention. FIG. 17 is a cross-sectional view of the metal bracket that connects the frame of the seatback of the vehicle seat and the recliner according to Embodiment 3 of the present invention, viewed from the EE direction in FIG. 16 ;

In the present invention, the seat frame on the seat back side and the metal bracket for fastening the recliner are fixed by integral molding (insert molding) with fiber reinforced resin, and the seat frame and the metal bracket are fixed by integral molding. It is constructed so as to have a shock absorbing function.

In addition, the present invention fixes the seat frame on the seat back side and the metal bracket for fastening the recliner by integral molding (insert molding) with a fiber reinforced resin, and the fixing portion between the seat frame and the metal bracket has a cross-sectional area of are connected by a plurality of connecting members having different cross-sectional areas, and the plurality of connecting members having different cross-sectional areas are sequentially destroyed at the time of a rear-end collision to absorb the impact energy.

Further, in the present invention, the seat frame on the seat back side and the metal bracket for fastening the recliner are fixed by integral molding (insert molding) with a resin member, and the fixed portion between the seat frame and the metal bracket has a cross-sectional area. When a shear force is generated between the seat frame and the metal bracket for fastening the recliner by connecting with a plurality of different connecting members, the inside of the hole with a small cross-sectional area is filled when the vehicle is rear-ended. It is configured to absorb the impact energy by destroying the resin members in order.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention should not be construed as being limited to the description of the embodiments shown below. Those skilled in the art will easily understand that the specific configuration can be changed without departing from the idea or gist of the present invention.

FIG. 1 is a perspective view showing the appearance of a vehicle seat 100 according to an embodiment of the invention. The vehicle seat 100 includes a seat cushion 110 on which a passenger sits, a seat back 120 against which the passenger seated on the seat cushion 110 leans the back, and a headrest 130 for protecting the head of the passenger seated on the seat cushion 110. ing.

The seat cushion 110 includes a seat portion 111 and bank portions 112 formed on both sides of the seat portion 111 on the side of the seat cushion. On the other hand, the seat back 120 has a backrest portion 121 against which a passenger seated on the seat cushion 110 leans the back, and bank portions 122 on the seat back side formed on both sides of the backrest portion 121.例文帳に追加

In FIG. 2, reference numeral 150 denotes a seat back frame that constitutes the seat back 120, and is molded with fiber-reinforced resin. A metal bracket 160 is connected to a recliner (not shown), and is integrally molded with the metal bracket 160 at a pair of lower end portions 151 of the seatback frame 150 by fiber-reinforced resin molding. Reference numeral 152 denotes a resin member formed with a thick mold on the back side of the pair of lower end portions 151 of the seat back frame 150 .

FIG. 3 is a side view of the seat back frame 150 and the metal bracket 160 integrally molded (insert molded). A metal bracket 160 protrudes from the lower end of the seatback frame 150 . A hole 1611 formed in the metal bracket 160 is a hole for attaching to a recliner (not shown).

Here, when the vehicle is rear-ended while a passenger (not shown) is seated on the vehicle seat 100, the seat back frame 150 is positioned rearward with respect to the seat back frame 150 from the passenger (not shown). (Right direction in FIG. 3) receives an impact force _F0 . The seatback frame 150 receiving this impact force _F0 acts as a moment force with a recliner (not shown) attached via a hole 1611 formed in the metal bracket 160 as a fulcrum.

In this state, the recliner (not shown) is generally stationary so that the metal bracket 160 attached to the recliner (not shown) through hole 1611 cannot rotate. As a result, a moment force acts on the seatback frame 150 integrally formed with the metal bracket 160, and the seatback frame 150 tilts backward a little. As a result, in the seat back frame 150, the front (left side in FIG. 3: the side close to the back of the seated passenger, that is, the front surface side of the seat back 120) and the rear (right side in FIG. 3: the seated passenger) Forces in different directions act on the side far from the back of the seat back 120 (that is, the front surface of the seat back 120 and the rear surface on the opposite side).

That is, an upward pulling (pulling force) force F1 acts on the front of the seatback frame ₁₅₀ , and a downward pressing force (compression force) F2 acts on the rearward of the seatback frame 150. _FIG .

4 shows the appearance of the metal bracket 160. As shown in FIG. The metal bracket 160 has a front bent surface 162 on the front side of the side surface 161 and a rear bent surface 163 on the rear side. formed. A hole 1611 formed in the side surface 161 is a hole for attaching a recliner (not shown).

Holes 1621 , 1622 , and 1623 whose diameters gradually decrease from the top are formed in the front bending surface 162 in a row at substantially equal intervals in the vertical direction as a row of holes 1620 penetrating through the surface 162 . On the other hand, holes 1631 , 1632 , and 1633 whose diameters gradually increase from the top are formed in a line in the vertical direction at approximately equal intervals as a row of holes 1630 penetrating through the rear bent surface 163 .

FIG. 5 shows a side view of the metal bracket 160, which is a view viewed from the arrow direction CC in FIG. Holes 1621 , 1622 , and 1623 whose diameters gradually decrease from the top are formed in the front bending surface 162 in a row at substantially equal intervals in the vertical direction as a row of holes 1620 penetrating through the surface 162 . On the other hand, on the rear bending surface 163, holes 1631 and 1632 having diameters increasing sequentially from the top are provided as a row of holes 1630 penetrating through the rear bending surface 163 at a position farther from the row of holes 1620 penetrating therethrough when viewed from the side. , 1633 are formed in a line in the vertical direction at approximately equal intervals.

That is, the row of through holes 1620 formed in the front side bending surface 162 and the row of through holes 1630 formed in the rear side bending surface 163 are opposite to _each other, and the front side to which the tensile force F1 acts. A row of through holes 1620 formed in the bent surface 162 is formed so that the diameter decreases in order from the top, and a row of through holes 1630 formed in the rear bent surface 163 _on which the compressive force F2 acts is Contrary to the front side bending surface 162 _on which the pulling force F1 acts, it is formed so that the diameter increases in order from the top.

That is, the penetrating hole row 1620 formed in the front bending surface 162 on which the tensile force F1 _acts is the _point of action of the impact force _F0 on the seat back frame 150 (in FIG. 3, the point of action of F0 is one point). However, in reality, the impact force is received from the surface that hits the back of the passenger, so it has a planar spread).

On the other hand, the through hole array 1630 formed in the rear side bending surface 163 on which the compressive force _F2 acts is arranged such that the diameter of the hole decreases as the point of action of the impact force F0 on the seat back frame 150 is approached. are placed.

FIG. 6 shows a cross-sectional view taken along the line AA in FIG. 3 (a cross section along the front folding surface 162). 7 shows a cross-sectional view along the line BB in FIG. 3 (a cross-section along the rear side bending surface 163). Since the seat back frame 150 and the metal bracket 160 are integrally formed by molding, the inside of the holes 1621, 1622, and 1623 formed in the front side bending surface 162 in FIG. 6 and the rear side bending surface 163 in FIG. The insides of the holes 1631, 1632, and 1633 formed in the seat back frame 150 are filled with the resin member 152 at the lower end of the seat back frame 150, respectively.

In this manner, the resin member 152 is filled inside the holes 1621, 1622, and 1623 formed in the front side bending surface 162 and inside the holes 1631, 1632, and 1633 formed in the rear side bending surface 163. Thus, the seatback frame 150 and the metal bracket 160 are integrally molded, and the metal bracket 160 is fixed to the seatback frame 150 .

When the seat back frame 150 and the metal bracket ₁₆₀ are structured as shown in FIGS. , 1632 and 1633 _are subjected to a compressive force F2, a shear force is generated in the resin members filled in the respective holes.

The shear stress generated by this shear force is inversely proportional to the cross-sectional area if the applied shear force is the same. That is, the largest shear stress occurs in the hole 1623 with the smallest cross-sectional area in the row of through holes 1620, and the largest shear stress occurs in the hole 1631 with the smallest cross-sectional area in the row of through holes 1630. Shear stress occurs.

In the graph of FIG. 8, the relationship between shear force (f) and displacement (s) generated in the resin member is shown as a load-stroke diagram (FS diagram). In the graph of FIG. 8, straight lines 801-803 are shear forces applied from the metal bracket 160 to the resin members filled in the holes 1621, 1622, 1623 and the holes 1631, 1632, 1633 according to this embodiment. It shows the relationship between (f) and displacement (s) in combination.

On the other hand, the straight line 811 corresponds to Comparative Example 1, in which three holes (holes of the same diameter) each having a cross-sectional area one-third of the total cross-sectional area of the holes 1621, 1622, and 1623 are formed, and the resin member is inserted therein. shows the relationship between load (f) and displacement (s) when filled with Further, a straight line 821 indicates a case where one hole having a large diameter having the same cross-sectional area as the sum of the cross-sectional areas of the holes 1621, 1622, and 1623 is formed and the resin member is filled therein. The relationship between load (f) and displacement (s) is shown.

In the case of Comparative Example ₁ , the relationship between the load (f) and the displacement (s) changes like a straight line 811, and when the load reaches _f11 and the displacement amount reaches s11, the shear breaking stress is reached, The resin member filled in each of the three holes having the same diameter is destroyed and cut.

In the case of Comparative Example 2, the relationship between the load (f) and the displacement (s) changes like a straight line 812 _, and when the load reaches _f12 and the displacement amount reaches s3, the shear breaking stress is reached. , the resin member filled in the large-diameter hole is destroyed and cut.

On the other hand, in the present embodiment, the load (shear force) (f) and the displacement until reaching the displacement amount s ₃ when the resin member filled in the large diameter hole in Comparative Example 2 is broken and cut The relationship of (s) is the relationship shown by straight lines 801-803.

First, a straight line 801 represents the load (f) and the displacement (s) at the hole 1623 with the smallest cross-sectional area in the row of through holes 1620 and the hole 1631 with the smallest cross-sectional area in the row of through holes 1630. Show relationship. When a shearing force is applied to the resin member filled inside the holes 1621, 1622, and 1623 or inside the holes 1631, 1632, and 1633, the hole 1623, which has the smallest cross-sectional area in the row of holes 1620 passing through, is the most sheared. A large shearing stress is generated, and the largest shearing stress is generated in the hole 1631 having the smallest cross-sectional area in the row of through holes 1630 . When the shearing force (f) reaches _f1 , the shearing force (f) applied to the resin member filled in the holes 1623 and 1631 reaches the fracture breaking stress and the resin member filled in the holes 1623 and 1631 breaks. do.

A straight line 802 indicates the hole 1622 having the second smallest cross-sectional area in the through hole array 1620 and the cross-sectional area Load (f) vs. displacement (s) at the second smallest hole 1632 is shown. When the resin member filled in the holes 1623 and 1631 breaks, that is, when the displacement reaches S1, the shear force applied to the holes 1622 and 1632 becomes _a value smaller _than f1 (the stress is attenuated), It increases along line 802 . When the shear force applied to the holes 1622 and 1632 reaches f2, the shear force ₍ f) applied to the resin member filled in the holes 1622 and 1632 reaches the breaking stress and the holes 1622 and 1632 are filled. The resin member is broken.

A straight line 803 indicates a hole 1621 having the largest cross-sectional area in the through hole array 1620 and a cross-sectional area The relationship between load (f) and displacement (s) at the largest hole 1633 is shown. When the resin member filled in the holes 1622 and 1632 breaks, that is, when the displacement reaches S2, the shear force applied to the holes 1621 and 1633 becomes a value smaller _than f2 ₍ the stress is attenuated), and linear Increase along 803 . When the amount of displacement of the resin member in the holes 1621 and 1633 reaches s3 _, which is the same as in Comparative Example ₂ , the shear force applied to the resin member filled in the holes 1621 and 1633 is f3. It becomes a state with a margin against the breaking stress of

As described above, according to this embodiment, the resin member filled in the holes 1621 and 1633 has a margin by destroying in order from the point farthest from the point where the impact force acts and absorbing the impact force. The impact force can be received, and the impact resistance can be improved by the resin member filled in the holes 1621 and 1633 .

In addition, according to the present embodiment, when shear stress occurs, fracture progresses step by step from the smaller diameter hole, so the generated stress can be attenuated (EA), and the generated stress to the fiber reinforced resin frame can be reduced. made it possible to lower it.

In addition, according to this embodiment, insert molding of the metal bracket made it possible to reduce the number of fastening/joining parts and the number of processing man-hours.

Furthermore, according to this embodiment, since the resin is molded through the metal bracket, it is possible to easily guarantee the adhesive strength in the adhesive bonding.

In the above-described embodiment, the holes having different diameters formed in the metal bracket are filled with the same resin material as that of the seat frame to reduce the impact at the time of a rear-end collision. The member to be filled in the holes having different diameters is not limited to the same resin member as the seat frame. For example, bolts of different diameters or rivets of different diameters may be used to connect the metal brackets and the seat frame through holes of different diameters formed in the metal brackets.

According to this embodiment, the seat frame on the seat back side and the metal bracket for fastening the recliner are fixed by integral molding with fiber reinforced resin, and the fixed portion between the seat frame and the metal bracket absorbs the impact at the time of rear-end collision. have been able to relax.

Further, according to this embodiment, the seat frame on the seat back side and the metal bracket for fastening the recliner are fixed by integral molding with fiber reinforced resin, and the fixed portion between the seat frame and the metal bracket has a cross-sectional area. It is possible to absorb the impact energy by connecting with a plurality of different connecting members and destroying the plurality of connecting members having different cross-sectional areas at the time of a rear-end collision in order.
[Variation]
As a modification of Example 1, an example in which the shapes of holes 1621, 1622, 1623 and holes 1631, 1632, 1633 are changed is shown.

FIG. 9 shows an example in which ellipses 2621 , 2622 , 2623 having lateral major axes and different sizes are formed on the front bent surface 162 instead of the holes 1621 , 1622 , 1623 . The ellipses are arranged so as to become smaller in order of 2621, 2622, and 2623, and the same effect as in the case of the first embodiment can be expected.

FIG. 10 shows an example in which ellipses 3621, 3622, and 3623 having lateral minor axes and different sizes are formed on the front bent surface 162. As shown in FIG. The ellipses are arranged so as to become smaller in the order of 3621, 3622, and 3623, and the same effect as in the case of the first embodiment can be expected.

FIG. 11 shows an example in which ellipses 4621, 4622, and 4623 with oblique major axes are formed on the front bent surface 162. As shown in FIG. The ellipses are arranged so as to become smaller in the order of 4621, 4622, and 4623, and the same effect as in the case of the first embodiment can be expected.

FIG. 12 shows an example in which the circles 5621, 5622, 5623 with different diameters are connected by slits 5624 and 5625 to form the front bent surface 162. FIG. The circles are arranged so as to become smaller in order of 5621, 5622, and 5623, and the same effect as in the case of the first embodiment can be expected.

FIG. 13 shows an example in which slits 6621, 6622, 6623 with different lengths are arranged in the vertical direction. The lengths of the slits are arranged so as to decrease in the order of 6621, 6622, and 6623, and the cross-sectional areas of the slits decrease in this order, and the same effect as in the case of the first embodiment can be expected. In the example shown in FIG. 13, the slits 6621, 6622, 6623 have the same width. Also, the length of each slit may be the same and the width dimension may be changed in order.

In Example 1, as shown in FIGS. 4 to 7, holes 1621, 1622, and 1623 with decreasing diameters are formed in the front bending surface 162 of the metal bracket 160, and the holes 1621, 1622, and 1623 are formed in the rear bending surface. Holes 1631 , 1632 , and 1633 whose diameters increase in order from the top are formed in the surface 163 . On the other hand, in this embodiment, as shown in FIGS. The columns 7630 are arranged in the same order.

FIG. 14 shows the appearance of a metal bracket 760 according to this embodiment. The metal bracket 760 has a front bent surface 762 on the front side of the side surface 761 and a rear bent surface 763 on the rear side. formed. A hole 7611 formed in the side surface 761 is a hole for attaching a recliner (not shown).

Holes 7621 , 7622 , and 7623 whose diameters gradually decrease from the top are formed in the front bending surface 762 in a row at approximately equal intervals in the vertical direction as a row of holes 7620 that penetrates the front side bending surface 762 . On the other hand, holes 7631, 7632, and 7633 whose diameters gradually decrease from the top are formed in a line in the vertical direction at approximately equal intervals as a hole row 7630 extending through the rear bent surface 763 .

FIG. 15 shows a side view of the metal bracket 760 as seen from the direction of arrows DD in FIG. Holes 7621 , 7622 , and 7623 whose diameters gradually decrease from the top are formed in the front bending surface 762 in a row at approximately equal intervals in the vertical direction as a row of holes 7620 that penetrates the front side bending surface 762 . On the other hand, on the rear bending surface 763, holes 7631 and 7632 having diameters decreasing in order from the top are provided as a row of through holes 7630 at a position farther from the row of holes 7620 through the side surface 761 when viewed from the side. , 7633 are formed in a line in the vertical direction at approximately equal intervals.

That is, the row of through-holes 7620 formed in the front side bending surface 762 and the row of through-holes 7630 formed in the rear side bending surface 763 are formed in the same row, so that the vehicle can be rear-ended. at the center of the hole 7611 attached to the recliner (not shown) that serves as the fulcrum of the seat back frame 150 when the seat back frame 150 receives an impact force _F0 in the rearward direction (right direction in FIG. 3). Holes 7623 and 7633 with smaller diameters are arranged closer to the fulcrum, and the diameters of holes 7622 and 7621 and the diameters of holes 7632 and 7631 are arranged to increase as they move away from the fulcrum.

According to the present embodiment, the resin member filled in the holes 7621 and 7631 can receive the impact force with sufficient margin, and although the effect is somewhat smaller than in the case of the first embodiment, the holes 7621 and 7631 Impact resistance can be improved by the filled resin member.

In addition, according to this embodiment, the seat frame on the seat back side and the metal bracket for fastening the recliner are fixed by integral molding with fiber reinforced resin. It is now possible to soften the impact.

Further, according to this embodiment, the seat frame on the seat back side and the metal bracket for fastening the recliner are fixed by integral molding with fiber reinforced resin, and the fixed portion between the seat frame and the metal bracket has a cross-sectional area. It is possible to absorb the impact energy by connecting with a plurality of different connecting members and destroying the plurality of connecting members having different cross-sectional areas at the time of a rear-end collision in order.

In Examples 1 and 2, the examples in which the row of holes 1620 and 1630 or 7620 and 7630 penetrating the metal bracket 160 or 760 are formed, but in the present example, the row of holes penetrating the metal bracket 160 or 760 is formed. Instead, a plurality of convex portions (embossed portions) having different outer diameters are formed on the metal bracket.

FIG. 16 shows a perspective view of the appearance of the metal bracket 860 in this embodiment. The metal bracket 860 has a front bent surface 862 on the front side of the side surface 861 and a rear bent surface 863 on the rear side. formed. A hole 8611 formed in the side surface 861 is a hole for attaching a recliner (not shown).

Protrusions 8621 , 8622 , and 8623 whose outer diameters decrease in order from the top are formed in a line in the vertical direction at approximately equal intervals as a row of protrusions 8620 on the front bent surface 862 . On the other hand, on the rear bent surface 863, as a row 8630 of projections, projections 8631, 8632, and 8633 whose outer diameters increase in order from the top are formed in a row in the vertical direction at approximately equal intervals.

FIG. 17 shows a cross section of the metal bracket 860 viewed from direction EE in FIG. Protrusions 8621 , 8622 , and 8623 whose outer diameters decrease in order from the top are formed in a line in the vertical direction at approximately equal intervals as a row of protrusions 8620 on the front bent surface 862 . On the other hand, although not shown in FIG. 17, on the rear side bending surface 863 as well, convex portions 8631, 8632, and 8633 whose diameters increase in order from the top are aligned in a vertical direction as a row 8630 of convex portions. formed at intervals.

That is, the row of projections 8620 formed on the front side bending surface 862 and the row of projections 8630 formed on the rear side bending surface 863 are opposite in arrangement of the outer diameters of the projections, and the tensile force F ₁ is applied. The row of projections 8620 formed on the front side bending surface 862 on which the force F2 acts is formed so that the diameter decreases sequentially from the top, and the row of projections formed on the rear side bending surface 863 on which the compressive force F2 acts. Contrary to the front side bending surface 862 _on which the pulling force F1 acts, 8630 is formed so that the diameter increases in order from above.

That is, the row 8620 of projections formed on the front side bending surface 862 on which the tensile force F1 _acts has _a smaller outer diameter as it moves away from the point of action of the impact force F0 on the seat back frame 150. are arranged as

On the other hand, the row of projections 8630 formed on the rear side bending surface 863 on which the compressive force _F2 acts is formed so that the diameter of the hole becomes smaller as the point of action of the impact force F0 on the seat back frame 150 is approached. are placed.

In the example shown in FIGS. 16 and 17, the row of protrusions 8620 formed on the front bending surface 862 is formed in a shape that protrudes outward from the front bending surface 862. , the row of projections formed on the front side bending surface 862 is shaped to protrude toward the inside of the front side bending surface 862 (shape facing the row of projections 8630 formed on the rear side bending surface 863). may be formed.

According to this embodiment, the seat back frame on the seat back side and the metal bracket for fastening the recliner are fixed by integral molding with a fiber reinforced resin, and the fixed portion between the seat back frame and the metal bracket is fixed to the seat back in the event of a rear-end collision. It is now possible to soften the impact.

Further, according to this embodiment, the seatback frame and the metal bracket for fastening the recliner are fixed by integral molding with fiber reinforced resin, and the seatback frame and the metal bracket are fixed to a plurality of portions having different cross-sectional areas. , and by sequentially destroying the plurality of connecting members with different cross-sectional areas at the time of a rear-end collision, the impact energy can be absorbed.

DESCRIPTION OF SYMBOLS 100... Vehicle seat 110... Seat cushion 120... Seat back 150... Seat back frame 160, 760, 860... Metal bracket 1620, 1630, 7620, 7630... Row of through holes

Claims (15)

A vehicle seat comprising a seat cushion and a seat back,
The seat back is
resin seat back frame,
a metal bracket integrally molded with the resin seatback frame for attaching the resin seatback frame to another member;
A plurality of holes having different diameters are arranged in the metal bracket in order of size of the diameter, and the seat back frame made of resin is placed inside the plurality of holes having different diameters formed in the metal bracket. A vehicle seat characterized by being filled with a resin of the same material as the. 2. The vehicle seat according to claim 1, wherein said metal bracket is provided with said metal bracket on a side where a pulling force is generated on said seat back frame made of resin when said seat back receives an impact load in a rearward direction. A vehicle seat, wherein a plurality of holes having different diameters are formed so that the diameters of the holes become smaller in order from the top. 2. The vehicle seat according to claim 1, wherein the metal bracket has a side on which a compressive force is generated on the resin seat back frame when the seat back receives an impact load in a rearward direction. A vehicle seat, wherein a plurality of holes having different diameters are formed such that the diameters of the holes increase in order from the top. 4. The vehicle seat according to any one of claims 1 to 3, wherein the resin seat back frame is made of fiber reinforced resin. A vehicle seat comprising a seat cushion and a seat back,
The seat back is
resin seat back frame,
A surface for attaching the resin seatback frame to another member, and a front surface formed at right angles to the surface for attaching to the other member and forward of the surface for attaching to the other member. and a rear surface formed at right angles to the surface for mounting to the other member behind the surface for mounting to the other member, and the metal bracket integrally molded with the seat back frame made of resin. and
The front surface of the metal bracket is formed with a plurality of holes having diameters gradually decreasing from the top, and the rear surface of the metal bracket is formed with a plurality of holes having diameters gradually increasing from the top. The same material as the resin seat back frame is filled inside the plurality of holes formed in the front surface of the metal bracket and the plurality of holes formed in the rear surface of the metal bracket. A vehicle seat characterized by being filled with a resin of 6. The vehicle seat according to claim 5, wherein the plurality of holes formed in the front surface of the metal bracket and having diameters that decrease in order from top to bottom allow the seat back to receive an impact load in the rearward direction. A vehicle seat characterized in that it receives tensile forces that occur from time to time. 6. The vehicle seat according to claim 5, wherein the plurality of holes formed in the rear surface of the metal bracket and having diameters that increase in order from top to bottom allow the seat back to receive an impact load in the rear direction. A vehicle seat characterized in that it is subject to compressive forces that occur from time to time. 8. The vehicle seat according to any one of claims 5 to 7, wherein the resin seat back frame is made of fiber reinforced resin. A vehicle seat comprising a seat cushion and a seat back,
The seat back is
resin seat back frame,
a metal bracket integrally molded with the resin seatback frame for attaching the resin seatback frame to another member;
The seat back is attached to the metal bracket integrally molded with the resin seat back frame on the side where a pulling force is generated in the resin seat back frame when the seat back receives an impact load in the rearward direction. A plurality of holes are formed with diameters decreasing with distance from a position receiving an impact load in the rear direction, and when the seat back receives an impact load in the rear direction, a compressive force is applied to the resin seat back frame. On the side where the impact load is generated, the metal bracket integrally molded with the resin seat back frame is formed with a plurality of holes whose diameter increases as the seat back moves away from the position where the impact load is received in the rear direction, The seat back frame made of resin is placed inside the plurality of holes whose diameters decrease with distance from the position of the metal bracket receiving the impact load and the plurality of holes whose diameter increases with distance from the position receiving the impact load. A vehicle seat characterized by being filled with a resin of the same material as the. 10. The vehicle seat according to claim 9, wherein the side on which a tensile force is generated in the resin seat back frame when the seat back receives an impact load in the rear direction is the front surface of the seat back. A near side where a compressive force is generated in the resin seat back frame when the seat back receives an impact load in a rearward direction is a side near the rear surface of the seat back. vehicle seat. 11. The vehicle seat according to claim 9, wherein the resin seat back frame is made of fiber reinforced resin. A vehicle seat comprising a seat cushion and a seat back,
The seat back is
resin seat back frame,
a metal bracket that is insert-molded into the resin seatback frame and attaches the resin seatback frame to another member;
A vehicle, wherein a plurality of protrusions having different outer diameters are arranged in order of the outer diameter in a portion of the metal bracket which is insert-molded into the resin seat back frame. sheet for. 13. The vehicle seat according to claim 12, wherein the metal bracket has the metal bracket on the side where a pulling force is generated on the resin seat back frame when the seat back receives an impact load in the rearward direction. A vehicle seat, wherein a plurality of protrusions are formed such that the outer diameters of the protrusions decrease in order from the top. 13. The vehicle seat according to claim 12, wherein the metal bracket has a side on which a compressive force is generated on the resin seat back frame when the seat back receives an impact load in a rearward direction. A vehicle seat, wherein a plurality of protrusions are formed such that the outer diameters thereof increase in order from the top. 15. The vehicle seat according to any one of claims 12 to 14, wherein the resin seat back frame is made of fiber reinforced resin.

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