Vehicle seat frames and vehicle seats

Abstract

To obtain a vehicle seat frame that can suppress the displacement of the armrest toward the front of the vehicle during a frontal collision. [Solution] The vehicle seat frame 12 comprises a back frame 26 that constitutes the skeleton of the seat back 20, an armrest frame 34 that constitutes the skeleton of the armrest 22, the left end of which is connected to the back frame 26 via a recliner 60, and the right end of which is rotatably supported relative to the back frame 26, a lock pin 90 attached to the armrest frame 34 and displaceable between a locked position in which it fits into a lock hole formed in the back frame 26 when the armrest frame 34 is in the upright position and an unlocked position in which it comes out of the lock hole, and an interlocking mechanism 70 that displaces the lock pin 90 from the locked position to the unlocked position in conjunction with the unlocking of the recliner 60.

Description

Technical Field

[0001] The present invention relates to a vehicle seat, and more particularly to a vehicle seat frame.

Background Art

[0002] In the seat with an armrest disclosed in Patent Document 1 below, the armrest is provided so as to be able to stand up and fall down via a detachable support shaft at the outer end of the seat back, and a lock pin, which is a means for preventing the support shaft of the armrest from coming out of the seat back, is provided so that the unlocking operation can be performed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in a vehicle seat in which an armrest is provided at the center in the seat width direction of the seat back, one end portion in the seat width direction of the armrest frame constituting the skeleton of the armrest is connected to the frame body of the vehicle seat via a recliner, while the other end portion in the seat width direction of the armrest frame is rotatably supported with respect to the frame body in some cases. In such a vehicle seat, when the luggage in the luggage compartment hits the back surface of the armrest due to a frontal collision of the vehicle, the other end portion side in the seat width direction of the armrest frame (that is, the free hinge side) is greatly deformed. As a result, torsion occurs in the armrest frame, and the amount of displacement of the armrest toward the front side of the vehicle increases.

[0005] An object of the present invention is to obtain a vehicle seat frame and a vehicle seat capable of suppressing the displacement of the armrest toward the front side of the vehicle during a frontal collision of the vehicle.

Means for Solving the Problems

[0006] The first embodiment of the vehicle seat frame comprises: a back frame that constitutes the skeleton of the seat back of the vehicle seat; an armrest frame that constitutes the skeleton of the armrest, with one end in the seat width direction connected to the back frame via a recliner, and the other end in the seat width direction rotatably supported with respect to the back frame, and rotatable between an upright position and a forward-tilted position when the lock of the recliner is released; a lock pin attached to the armrest frame, protruding from the other end in the seat width direction, and displaceable between a locked position in which it fits into a lock hole formed in the back frame when the armrest frame is in the upright position, and an unlocked position in which it comes out of the lock hole; and an interlocking mechanism that displaces the lock pin from the locked position to the unlocked position in conjunction with the release of the recliner.

[0007] The first embodiment of the vehicle seat frame comprises a back frame that constitutes the frame of the seat back of the vehicle seat and an armrest frame that constitutes the frame of the armrest. One end of the armrest frame in the seat width direction is connected to the back frame via a recliner, and the other end in the seat width direction is rotatably supported relative to the back frame. This armrest frame is rotatable between an upright position and a forward-tilted position when the recliner is unlocked.

[0008] A locking pin is attached to this armrest frame. The locking pin protrudes from the other end of the armrest frame in the seat width direction and is positioned in the locked position when the armrest frame is in the upright position. In this state, the locking pin fits into a locking hole formed in the back frame, restricting the rotation of the other end of the armrest frame in the seat width direction relative to the back frame. On the other hand, when the recliner lock is released, the interlocking mechanism displaces the locking pin from the locked position to the unlocked position in conjunction with the release of the lock. As a result, the locking pin comes out of the locking hole and the rotation restriction is released.

[0009] With this vehicle seat frame, when the armrest frame is in the upright position, the locking pin is positioned in the locked position. Therefore, even if luggage in the cargo area hits the back of the armrest during a frontal collision, it is possible to prevent the other end of the armrest frame in the seat width direction (the free hinge side) from deforming significantly. As a result, twisting of the armrest frame can be suppressed, and displacement of the armrest toward the front of the vehicle can be suppressed.

[0010] A second embodiment of a vehicle seat frame, in the first embodiment, the recliner has a reclining rod that rotates when unlocked, and the interlocking mechanism has a lever member fixed to the reclining rod and extending radially with respect to the reclining rod, and a link member whose middle portion is rotatably connected to the armrest frame, one end of which is rotatably connected to the lever member, and the other end of which is rotatably connected to the lock pin.

[0011] In the second embodiment of the vehicle seat frame, the reclining rod rotates when the recliner is unlocked. A lever member fixed to this reclining rod extends radially along the reclining rod. One end of a link member is rotatably connected to this lever member. The middle part of this link member is rotatably connected to the armrest frame, and the other end is rotatably connected to a lock pin. This allows the lock pin to be displaced from the locked position to the unlocked position in conjunction with the rotation of the reclining rod, thus simplifying the interlocking mechanism.

[0012] A third embodiment of a vehicle seat comprises a vehicle seat frame according to the first or second embodiment, wherein the frame of the seat back is formed by the back frame, and the frame of the armrest, which is rotatably attached to the seat back, is formed by the armrest frame.

[0013] In the third embodiment of the vehicle seat, the armrest frame, which constitutes the frame of the armrest, is rotatably attached to the back frame, which constitutes the frame of the seat back. Since the vehicle seat frame of this vehicle seat is of the first or second embodiment, the effects described above are obtained. [Effects of the Invention]

[0014] As described above, the vehicle seat frame and vehicle seat according to the present invention can suppress the displacement of the armrest toward the front of the vehicle during a frontal collision. [Brief explanation of the drawing]

[0015] [Figure 1] This is a perspective view showing a vehicle seat according to an embodiment. [Figure 2] This is a perspective view showing a vehicle seat frame according to an embodiment. [Figure 3] This is a first perspective view showing a part of a vehicle seat frame according to an embodiment. [Figure 4] This is a second perspective view showing a part of a vehicle seat frame according to an embodiment. [Figure 5] This is a front view showing a part of a vehicle seat frame according to an embodiment, and the lock pin is in the locked position. [Figure 6] This is a front view showing a part of a vehicle seat frame according to an embodiment, and the lock pin is in the unlocked position. [Figure 7] This is a front view showing the armrest frame of a vehicle seat frame according to an embodiment, deformed by a collision with luggage in the cargo compartment. [Figure 8] This is a plan view showing the state in which the armrest frame of a vehicle seat frame according to the embodiment has been deformed by a collision with luggage in the cargo compartment. [Figure 9] This is a plan view showing the state in which the armrest frame of a vehicle seat frame, according to a comparative example, has been deformed due to a collision with luggage in the cargo compartment.

Best Mode for Carrying Out the Invention

[0016] Hereinafter, a vehicle seat 10 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8. In each figure, some reference numerals may be omitted for ease of viewing the drawings. Also, the arrows FR, LH, RH, and UP appropriately shown in each figure indicate the front, left, right, and upper directions of the vehicle seat 10, respectively. Hereinafter, when simply using the front-back, left-right, and up-down directions for explanation, it shall indicate the directions with respect to the vehicle seat 10.

[0017] As shown in FIG. 1, the vehicle seat 10 according to the present embodiment includes a seat cushion 14 on which an occupant sits, a seat back 16 that supports the occupant's back, and two headrests 18 that support the occupant's head. This vehicle seat 10 is a two-seater seat and constitutes the right side portion and the left-right center portion of a three-seater rear seat. To the left of this vehicle seat 10, a single-seater vehicle seat (not shown) is arranged. The front-back, left-right, and up-down directions of this vehicle seat 10 coincide with the front-back, left-right, and up-down directions of the vehicle.

[0018] The seat back 16 includes a back main body portion 20 that constitutes the main body portion of the seat back 16, and a back movable portion 22 arranged side by side on one side in the seat width direction (here, the left side) with respect to the back main body portion 20. A back central lower portion 20A, which is a part of the back main body portion 20, protrudes from the lower portion of the back main body portion 20 to the left side and is arranged below the back movable portion 22. The back movable portion 22 is rotatable with respect to the back main body portion 20 (that is, with respect to the vehicle) between the upright position shown in FIG. 1 and a forward-falling position (not shown) where it is forward-fallen onto the seat cushion 14. This back movable portion 22 can be used as an armrest in the forward-falling position.

[0019] The back main body 20 corresponds to the "seat back" in the present invention, and the back movable part 22 corresponds to the "armrest" in the present invention. Hereinafter, the back main body 20 will be referred to as the "seat back 20", and the back movable part 22 will be referred to as the "armrest 22". Hereinafter, when explaining the front-rear, left-right, up-down directions with respect to the armrest 22, it shall indicate the directions in the state where the armrest 22 is located at the upright position.

[0020] As shown in FIG. 2, the vehicle seat frame 12 that constitutes the skeleton of the vehicle seat 10 includes a cushion frame 24 that constitutes the skeleton of the seat cushion 14, a back frame 26 that constitutes the skeleton of the seat back 20, and an armrest frame (back movable frame) 34 that constitutes the skeleton of the armrest 22.

[0021] The cushion frame 24 is constituted by, for example, a metal pipe material or a metal plate material, etc., and has a substantially frame shape with the left-right direction as the longitudinal direction when viewed in the up-down direction. Similarly, the back frame 26 is constituted by, for example, a metal pipe material or a metal plate material, etc., and has a substantially frame shape with the up-down direction as the longitudinal direction when viewed in the front-rear direction. Similarly, the armrest frame 34 is constituted by, for example, a metal pipe material or a metal plate material, etc., and has a substantially frame shape with the up-down direction as the longitudinal direction when viewed in the front-rear direction.

[0022] Three hinge brackets 36, 38, 40 are fixed to the rear part of the cushion frame 24. The three hinge brackets 36, 38, 40 are arranged at intervals in the left-right direction and extend upward from the rear part of the cushion frame 24. The hinge bracket 36 is fixed to the right end of the rear part of the cushion frame 24, the hinge bracket 38 is fixed to the middle part in the left-right direction of the rear part of the cushion frame 24, and the hinge bracket 40 is fixed to the left end of the rear part of the cushion frame 24.

[0023] The lower end of the back frame 26 is positioned between the hinge bracket 36 and the hinge bracket 38. The back frame 26 is connected to the hinge brackets 36 and 38 via a well-known recliner 44. Slightly below the vertical midpoint of the back frame 26, an intermediate frame 28 is provided that extends in the left-right direction. The intermediate frame 28 is made of, for example, a metal pipe and has an extension 28A that extends to the left side of the back frame 26.

[0024] A connecting bracket 42, which is constructed by joining two metal plates, for example, is fixed to the left end of the extension 28A of the intermediate frame 28 by means of welding or other means. The connecting bracket 42 extends downward from the left end of the extension 28A. The lower end of the connecting bracket 42 is superimposed on the upper end of the hinge bracket 40 from the right side and is connected to the upper end of the hinge bracket 40 using a stepped bolt 46 and a nut (not shown). The stepped bolt 46 is arranged coaxially with the recliner 44 described above. When the lock of the recliner 44 is released, the back frame 26, i.e., the seat back 20, tilts in the front-rear direction relative to the cushion frame 24, i.e., the seat cushion 14. At this time, the connecting bracket 42 is configured to tilt together with the back frame 26.

[0025] A connecting bracket 48 is provided at the right end of the extension 28A of the intermediate frame 28, paired with the connecting bracket 42. The connecting bracket 48 is made of, for example, a metal plate and is fixed to the right end of the extension 28A by means of welding or other means, and extends diagonally downward and forward from the extension 28A. As shown in Figures 2 to 6, the lower end of the armrest frame 34 is positioned between the upper end of the connecting bracket 42 and the connecting bracket 48.

[0026] The armrest 22, whose frame is formed by the armrest frame 34, has an armrest pad 50 which is a cushioning material and a trim cover 54 which is a surface material, as shown in Figure 1. The armrest pad 50 is made of a foam material such as urethane foam. The armrest frame 34 has a pair of left and right side frames 34A and 34B that extend vertically (in the longitudinal direction of the armrest 22) on the left and right sides of the armrest 22, an upper frame 34C that connects the upper ends of the left and right side frames 34A and 34B in the left-right direction, and a lower frame 34D that connects the lower ends of the left and right side frames 34A and 34B in the left-right direction.

[0027] The left and right side frames 34A, 34B and the upper frame 34C are constructed by joining together, for example, multiple press-formed metal plates, while the lower frame 34D is constructed from, for example, a metal pipe. The lower end of the left side frame 34A (i.e., one end of the armrest frame 34 in the seat width direction) is connected to the connecting bracket 42 via a well-known recliner 60. The lower end of the right side frame 34B (i.e., the other end of the armrest frame 34 in the seat width direction) is provided with a support shaft 66 that protrudes to the right. The support shaft 66 is cylindrical with its axis in the left-right direction and is rotatably fitted into a circular connecting hole (not shown) formed in the connecting bracket 48. This support shaft 66 and the recliner 60 are arranged coaxially.

[0028] A reclining rod 62 is provided at the axial center of the recliner 60. This reclining rod 62 is substantially cylindrical with its axis running in the left-right direction and penetrates the axial center of the recliner 60 in the left-right direction. A reclining lever 64 is fixed to the left end of this reclining rod 62. The reclining lever 64 is made of, for example, a press-formed metal plate and is in the shape of a long plate. A through hole (not shown) is formed at one longitudinal end (lower end) of the reclining lever 64 into which the left end of the reclining rod 62 is fitted. One longitudinal end of the reclining lever 64 is fixed to the left end of the reclining rod 62 by means of welding or other means.

[0029] One end of a strap (not shown) is connected to the other longitudinal end (upper end) of the reclining lever 64. This strap extends, for example, forward. When this strap is pulled forward, the reclining lever 64 and the reclining rod 62 rotate around the axis of the recliner 60, releasing the lock on the recliner 60. This allows the armrest frame 34 to rotate around the axis of the recliner 60 relative to the back frame 26, enabling the armrest 22 to rotate from the upright position to the forward-tilted position.

[0030] The reclining rod 62 described above protrudes to the right from the lower end of the left side frame 34A. A lever member 72 is fixed to the right end of this reclining rod 62. The lever member 72 has a lever plate 74 formed in the shape of a long plate and a link arm 76 formed in the shape of a rectangular bar and connected to the lever plate 74.

[0031] The lever plate 74 is made of, for example, a metal plate. The lever plate 74 is positioned with its thickness in the left-right direction and its length in the radial direction of the reclining rod 62, and is roughly teardrop-shaped when viewed from the left-right direction. A through hole (not shown) is formed at one longitudinal end (base end) of the lever plate 74 into which the right end of the reclining rod 62 is fitted. The longitudinal end of the lever plate 74 is fixed to the right end of the reclining rod 62 by means of welding or other means. The lever plate 74 extends upward and forward from the right end of the reclining rod 62.

[0032] The link arm 76 is made of, for example, a metal square bar. A cylindrical first connecting shaft 78 is fixed to one longitudinal end of the link arm 76, with its axis perpendicular to the longitudinal direction of the link arm 76. The first connecting shaft 78 is made of, for example, a metal round bar and is fixed to the link arm 76 by means of welding or other means. This first connecting shaft 78 is rotatably fitted into a circular through hole (not shown) formed in the other longitudinal end (tip) of the lever plate 74. The tip of the first connecting shaft 78 is crimped, preventing it from coming out of the through hole. As a result, the link arm 76 is connected to the lever plate 74 so as to be rotatable around the axis of the first connecting shaft 78. This link arm 76 extends upward and backward from the other longitudinal end of the lever plate 74.

[0033] A cylindrical second connecting shaft 80 is fixed to the other end of the link arm 76 in the longitudinal direction, with its axis perpendicular to the longitudinal direction of the link arm 76 and the axial direction of the first connecting shaft 78. This second connecting shaft 80 is made of, for example, a metal rod and is fixed to the link arm 76 by means of welding or other means. This second connecting shaft 80 is rotatably fitted into an oval through hole (not shown) formed at one end of the link member 82.

[0034] The link member 82 is made of, for example, a metal wire plate and has an L-shaped plate form. This link member 82 is attached to the lower frame 34D of the armrest frame 34 via a support bracket 84. The support bracket 84 is made of, for example, a press-formed metal plate and has a roughly box-like shape with the rear side open. This support bracket 84 is fixed to the middle of the lower frame 34D in the left-right direction by means of welding or other means and extends forward and downward from the lower frame 34D.

[0035] A plate-shaped connecting piece 84A extending forward and downward is provided at the front end of the support bracket 84. A cylindrical third connecting shaft 86, fixed to the middle part of the link member 82, is rotatably fitted into a circular through hole (reference numeral omitted) formed in this connecting piece 84A. The third connecting shaft 86 is made of, for example, a metal rod and is fixed to the link arm 76 by means of welding or other means. The axial direction of this third connecting shaft 86 is set parallel to the axial direction of the second connecting shaft 80. The tip of the third connecting shaft 86 fitted into the through hole of the connecting piece 84A is crimped, preventing the third connecting shaft 86 from coming out of the through hole. As a result, the link member 82 is supported by the support bracket 84 so as to be rotatable around the axis of the third connecting shaft 86. A lock pin 90 is connected to the other end of this link member 82.

[0036] The lock pin 90 has a pin body 92 made of, for example, a round metal bar, and a plate-shaped portion 94 made of, for example, a press-formed metal plate, which is fixed to the pin body 92, and has a long, rod-like shape with its longitudinal direction in the left-right direction. The pin body 92 penetrates the lower end of the right side frame 34B of the armrest frame 34 in the left-right direction.

[0037] The lower end of the side frame 34B is composed of two joined plate members and has two opposing wall portions 34B1 and 34B2 (see Figures 3 and 4) spaced apart in the left-right direction. Circular through holes 96 and 98 are formed in these wall portions 34B1 and 34B2, through which the pin body 92 is inserted. This allows the pin body 92 (i.e., the lock pin 90) to be slidably supported in the left-right direction relative to the right side frame 34B. One longitudinal end of the pin body 92 protrudes to the right from the lower end of the right side frame 34B. The right end of the pin body 92 is formed in a conical shape that tapers towards the right.

[0038] The plate-shaped portion 94 has a roughly U-shaped cross-section when viewed from the longitudinal direction, and the other longitudinal end of the pin body 92 is inserted inside the plate-shaped portion 94. The plate-shaped portion 94 is fixed to the pin body 92 by means of welding or other means. The plate-shaped portion 94 extends to the left of the pin body 92, and a cylindrical fourth connecting shaft 100 is fixed to the left end of the plate-shaped portion 94.

[0039] The fourth connecting shaft 100 is made of, for example, a metal round bar and is fixed to the plate-shaped part 94 by means of welding or other means. The axial direction of this fourth connecting shaft 100 is set parallel to the axial direction of the third connecting shaft 86. This fourth connecting shaft 100 is rotatably fitted into a circular through hole (not shown) formed at the other end of the link member 82. The tip of the fourth connecting shaft 100 is crimped, preventing it from coming out of the through hole. As a result, the lock pin 90 is connected to the reclining rod 62 via the link member 82 and the lever member 72.

[0040] The link member 82, the lever member 72, and the support bracket 84 constitute an interlocking mechanism 70. This interlocking mechanism 70 is configured to displace the lock pin 90 from the locked position (the position shown in Figures 2 to 5) to the unlocked position (the position shown in Figure 6) in conjunction with the unlocking of the recliner 60. Specifically, under normal conditions when the strap connected to the reclining lever 64 is not operated, the recliner 60 is locked, and the rotation of the armrest frame 34 relative to the connecting bracket 42 (i.e., the back frame 26) is restricted. In this state, the right end (tip) of the pin body 92 of the lock pin 90 is fitted into the circular lock hole (through hole) 102 formed in the connecting bracket 48. This restricts the rotation of the armrest frame 34 relative to the connecting bracket 48 (i.e., the back frame 26).

[0041] When the strap connected to the reclining lever 64 is operated forward, the reclining lever 64, reclining rod 62, and lever member 72 rotate counterclockwise when viewed from the left, and the link member 82 rotates clockwise when viewed from the front (see arrow R in Figure 6). As a result, the lock pin 90 is displaced to the left and positioned in the unlocked position. In this state, the lock of the recliner 60 is released, and the right end of the pin body 92 of the lock pin 90 comes out of the lock hole 102 of the connecting bracket 48 (see arrow L in Figure 6). This allows the armrest frame 34 to rotate relative to the back frame 26.

[0042] In the vehicle seat 10 with the above configuration, the back of the occupant seated on the seat cushion 14 is supported by the seat back 16. This seat back 16 comprises a seat back 20 that constitutes its main body, and an armrest 22 that is rotatable between an upright position and a forward-tilted position relative to the seat back 20. The armrest 22 can be used as an armrest when it is in the forward-tilted position.

[0043] The vehicle seat frame 12 of this vehicle seat 10 comprises a back frame 26 that forms the skeleton of the seat back 20 and an armrest frame 34 that forms the skeleton of the armrest 22. The left end (one end in the seat width direction) of the armrest frame 34 is connected to the back frame 26 via a recliner 60, and the right end (the other end in the seat width direction) is rotatably supported relative to the back frame 26. When the lock of the recliner 60 is released, the armrest frame 34 is rotatable between an upright position and a forward-tilted position.

[0044] A locking pin 90 is attached to the armrest frame 34. The locking pin 90 protrudes to the right from the right end of the armrest frame 34 and is positioned in the locked position when the armrest frame 34 is in the upright position. In this state, the locking pin 90 fits into a locking hole 102 formed in the connecting bracket 48 of the back frame 26, thereby restricting the rotation of the right end of the armrest frame 34 relative to the back frame 26. On the other hand, when the lock of the recliner 60 is released, the interlocking mechanism 70 displaces the locking pin 90 from the locked position to the unlocked position in conjunction with the release of the lock. As a result, the locking pin 90 comes out of the locking hole 102, and the rotation restriction is released.

[0045] With this vehicle seat frame 12, when the armrest frame 34 is in the upright position, the lock pin 90 is positioned in the locked position. Therefore, even if luggage (not shown) in the cargo compartment hits the back of the armrest due to a frontal collision of the vehicle (see Figures 7 and 8), it is possible to prevent the right end side (free hinge side) of the armrest frame 34 from deforming significantly. As a result, twisting of the armrest frame 34 can be suppressed, and displacement of the armrest 22 toward the front of the vehicle can be suppressed.

[0046] In other words, if the vehicle seat frame 12 does not have a locking pin 90 (see comparative example shown in Figure 9), when luggage in the cargo area hits the back of the armrest in a frontal collision, the right end (free hinge side) of the armrest frame 34 deforms significantly. As a result, twisting occurs in the armrest frame 34, and the amount of displacement of the armrest toward the front of the vehicle increases. However, in this embodiment, this displacement can be suppressed, making it easier to ensure the safety of the occupants.

[0047] Furthermore, in this vehicle seat frame 12, the recliner 60 has a reclining rod 62 that rotates when unlocked, and the interlocking mechanism 70 has a lever member 72 fixed to the reclining rod 62. The lever member 72 extends radially along the reclining rod 62. One end of a link member 82 is rotatably connected to this lever member 72. The middle part of the link member 82 is rotatably connected to the armrest frame 34, and the other end is rotatably connected to the lock pin 90. As a result, the lock pin 90 can be displaced from the locked position to the unlocked position in conjunction with the rotation of the reclining rod 62, allowing the interlocking mechanism 70 to have a simple configuration.

[0048] In the above embodiment, the case in which the vehicle seat 10 constitutes the right portion and the left-right central portion of a three-seater rear seat was described, but it is not limited to this. When the vehicle seat 10 according to the present invention constitutes the left portion and the left-right central portion of a three-seater rear seat, the configuration is symmetrical to that of the above embodiment.

[0049] Furthermore, although the above embodiment described the case in which the present invention is applied to a vehicle seat 10, the present invention is not limited to this and can also be applied to seats for vehicles other than vehicles (for example, aircraft and ships).

[0050] Furthermore, the present invention can be implemented with various modifications without departing from its spirit. Of course, the scope of the present invention is not limited to the embodiments described above. [Explanation of Symbols]

[0051] 10 Vehicle seats 12 Vehicle seat frames 20 Seatback 22 Armrest 26 Backframe 34 Armrest Frame 60 Reclining Seats 62 Reclining Rods 64 Reclining levers 70 Interlocking mechanism 72 Lever member 82 Link member 90 lock pins 102 lock holes

Claims

1. The back frame that constitutes the frame of the seat back of a vehicle seat, An armrest frame that constitutes the frame of the armrest, with one end in the seat width direction connected to the back frame via a recliner, and the other end in the seat width direction rotatably supported relative to the back frame, and which is rotatable between an upright position and a forward-tilted position when the lock of the recliner is released, A locking pin is attached to the armrest frame, protruding from the other end in the seat width direction, and is displaceable between a locked position in which it fits into a locking hole formed in the back frame when the armrest frame is in the upright position, and an unlocked position in which it comes out of the locking hole. An interlocking mechanism that displaces the lock pin from the locked position to the unlocked position in conjunction with the release of the reclining mechanism, A vehicle seat frame equipped with [a specific feature / feature].

2. The aforementioned recliner has a reclining rod that rotates when unlocked, The aforementioned interlocking mechanism is A lever member fixed to the reclining rod and extending radially along the reclining rod, A link member having its middle section rotatably connected to the armrest frame, one end rotatably connected to the lever member, and the other end rotatably connected to the lock pin, A vehicle seat frame according to claim 1, having the following features.

3. A vehicle seat frame according to claim 1 or claim 2, The frame of the seat back is formed by the back frame, A vehicle seat in which the frame of an armrest, which is rotatably attached to the seat back, is formed by the armrest frame.

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