JP6884122B2 - Vehicle seat frame - Google Patents

Description

The present invention relates to a vehicle seat frame having a shoulder support function.

The vehicle seat frame, which is the skeleton of the vehicle seat, usually consists of a seat cushion frame, a seat back frame extending upward from the rear end of the seat cushion frame, and a headrest frame attached to the upper part of the seat back frame. Become.

In some vehicle seat frames, a pair of mounting portions (headrest holders) are provided on the upper part of the seat back frame, and the headrest frame is provided detachably from the mounting portion. There is a technique disclosed in Patent Document 1 as a conventional technique relating to such a vehicle seat frame.

In the vehicle seat frame disclosed in Patent Document 1, a mounting portion is provided near the center of the upper part of the seat back frame. The headrest frame supports a pair of legs that can be inserted and removed from the mounting portion, a main body that connects the pair of legs, and a shoulder portion of an occupant seated on the vehicle seat that extends from the main body in the seat width direction. It consists of a shoulder support part.

Patent Document 1 states that a vehicle seat frame having a shoulder support function can be easily obtained by attaching a head frame having a shoulder support portion to a mounting portion of the seat back frame.

JP-A-2017-81525

By the way, the mounting portion (headrest holder) provided on the seat back frame may be provided with a lock mechanism or the like for fixing the headrest frame at a predetermined height.

Members such as the lock mechanism are mainly housed in the head of the mounting portion. At this time, the head of the mounting portion may become a protrusion (convex portion) that does not meet the predetermined radius of curvature.

However, it is not preferable that such a protrusion (convex portion) is provided on the upper portion of the vehicle seat frame. Therefore, it is conceivable to cover the entire head of the mounting portion with a guard cap or the like having a predetermined radius of curvature or more, but there is a concern that the number of parts and the mounting man-hours will increase.

The present invention has been made in consideration of such a problem, and a vehicle seat frame having a shoulder support function capable of protecting an occupant from protrusions on the upper part of the seat back frame without increasing the number of parts. The purpose is to provide.

The vehicle seat frame according to the present invention is a vehicle seat frame having a seat back frame, a pair of mounting portions provided on the upper portion of the seat back frame, and a headrest frame that can be attached to and detached from the mounting portions. The headrest frame comprises a pair of legs that can be inserted and removed from the pair of mounting portions, a main body portion that extends upward from the pair of leg portions, and a shoulder support portion that is attached to the main body portion. The support portion includes an upper frame that is attached to the main body and extends outward in the seat width direction, a lower frame that is located below the upper frame and is attached to the main body and extends outward in the seat width direction, and the upper portion. The lower frame has a connecting portion for connecting the outer ends of the lower frame in the seat width direction to each other, and the lower frame is viewed from the front of the seat when the pair of legs are attached to the mounting portion. It is located on the front side at a position overlapping the mounting portion.

In this way, in a vehicle seat frame having a shoulder support function, the number of parts is increased by arranging the lower frame of the shoulder support portion at a position overlapping the mounting portion when viewed from the front of the seat and in front of the mounting portion. It is possible to protect the occupant from the protrusions generated on the mounting portion on the upper part of the seat back frame.

Further, it is preferable that the lower frame extends from the connecting portion to the inside of the pair of legs in the seat width direction.

According to such a configuration, since the lower frame extends from the connecting portion to the inside of the pair of legs in the seat width direction, the occupant is reliably protected from the protrusions generated on the mounting portion on the upper portion of the seat back frame. It becomes possible.

Further, the shoulder support portion further includes a rising portion extending upward from the inner end portion in the seat width direction of the lower frame and an intermediate frame extending upward from the upper end of the rising portion in the seat width direction. Including, the outer end portion of the intermediate frame in the seat width direction is preferably attached to the pair of legs.

According to such a configuration, since the rising portion and the intermediate frame are arranged inside the pair of legs in the seat width direction, the occupant is more reliably protected from the protrusions generated on the mounting portion on the upper part of the seat back frame. It becomes possible to do.

Further, it is preferable that the lower frame is arranged on the front side in the front-rear direction of the seat rather than the pair of legs.

According to such a configuration, the shoulder portion of the occupant can be stably supported.

According to the present invention, in a vehicle seat frame having a shoulder support function, it is possible to protect an occupant from protrusions generated on a mounting portion on an upper portion of the seat back frame without increasing the number of parts.

It is a perspective view of the vehicle seat to which the vehicle seat frame which concerns on one Embodiment of this invention is applied. It is a perspective view of the vehicle seat frame of the vehicle seat shown in FIG. It is an upper enlarged perspective view of the vehicle seat frame shown in FIG. It is an exploded perspective view of the headrest frame shown in FIG. It is a top view of the headrest frame shown in FIG. FIG. 6A is a partial cross-sectional view showing a state in which the legs of the headrest frame are attached to the mounting portion of the seat back frame, and FIG. 6B is a cross-sectional view taken along the VIB-VIB line of FIG. 6A. It is a front view of the headrest frame shown in FIG. It is a rear view of the headrest frame shown in FIG. It is a left side view of the headrest frame shown in FIG.

Hereinafter, a vehicle seat frame according to an embodiment of the present invention will be described with reference to the accompanying drawings.

In the following description, with respect to the components of the vehicle seat including the vehicle seat frame, "left and right" shall mean the seat width direction, and the left direction is based on the occupant seated on the vehicle seat. It is indicated by an arrow L, and the right direction is indicated by an arrow R. Similarly, "front and back" and "up and down" mean the front and rear direction and the up and down direction with reference to the occupant seated on the vehicle seat, the front is indicated by the arrow Fr, the rear is indicated by the arrow Rr, and the upper is indicated by the arrow. It is indicated by Up, and the lower part is indicated by an arrow Dn.

Further, the "front view" means the direction when the vehicle seat is viewed from the front side (for example, the front window side) in the front-rear direction of the seat.

FIG. 1 shows a vehicle seat 10 to which one embodiment of the present invention is applied. As shown in FIG. 1, the vehicle seat 10 is of a type provided in the driver's seat or the passenger seat of an automobile.

The vehicle seat 10 includes left and right seat legs 14L and 14R fixed to the floor (body floor) 12, and left and right rails 16L and 16R attached to these seat legs 14L and 14R and extending in the front-rear direction. A seat cushion 18 slidably supported on the left and right rails 16L and 16R in the front-rear direction, a seat back 20 raised from the rear end of the seat cushion 18, and a headrest 22 provided at the upper end of the seat back 20. And.

The seat cushion 18 has a seating portion 24 on which an occupant is seated, and left and right cushion portion side supports 26L and 26R that bulge upward from both left and right ends of the seating portion 24.

The seat back 20 is provided on the lower back 28 that supports the occupant's torso, the left and right lower side supports 30L and 30R that bulge forward from the left and right ends of the lower back 28, and the shoulders of the occupant. It has a backrest upper portion 32 that supports the periphery, and left and right upper side supports 34L and 34R that bulge forward from both left and right ends of the backrest upper portion 32.

FIG. 2 shows a seat frame (vehicle seat frame) 36 which is a frame of the vehicle seat 10. The seat frame 36 becomes a vehicle seat 10 (FIG. 1) by attaching a cushion material, a skin, or the like (not shown).

As shown in FIG. 2, the seat frame 36 includes a seat cushion frame 38 supported by left and right rails 16L and 16R extending in the front-rear direction, and a seat back frame 40 attached to the rear end portion of the seat cushion frame 38. A headrest frame 42 attached to the upper part of the seat back frame 40 is provided.

The seat back frame 40 includes a lower back frame 44 extending in the seat width direction, left and right side back frames 46L and 46R extending upward from both ends of the lower back frame 44, and upper ends of these side back frames 46L and 46R. It has an upper back frame 48 that connects the two back frames to each other, and a cross member 49 that connects the side back frames 46L and 46R in the middle.

A shoulder support portion 64 is provided above the upper back frame 48 at a position behind the shoulders of the occupant. The shoulder support portion 64 constitutes a part of the headrest frame 42. Hereinafter, the details of the headrest frame 42 including the shoulder support portion 64 will be described.

As shown in FIGS. 3, 7, and 8, left and right mounting portions 50L and 50R are provided in the vicinity of the center of the upper back frame 48 so as to be separated from each other in the seat width direction. These mounting portions 50L and 50R support the headrest frame 42 in a detachable manner.

The left side mounting portion 50L includes a body portion 52L having a substantially cylindrical shape and a head portion 54L provided at the upper end of the body portion 52L. The fuselage portion 52L is inserted into the holder bracket 53L welded to the upper back frame 48 and the cross member 49 (see FIG. 6A). A hole 50La is formed inside the body portion 52L and the head portion 54L so that the leg portion 66L of the headrest frame 42 can be inserted and removed along the axial direction of the mounting portion 50L.

A lock mechanism 56 for fixing the leg 66L of the headrest frame 42 at a predetermined height is housed in the head 54L of the left mounting portion 50L. The details of the lock mechanism 56 will be described later.

The mounting portion 50R on the right side includes a body portion 52R having a substantially cylindrical shape and a head portion 54R provided at the upper end of the body portion 52R. The body portion 52R is inserted into the holder bracket 53R welded to the upper back frame 48 and the cross member 49. A hole 50Ra into which the leg portion 66R of the headrest frame 42 can be inserted and removed is formed inside the body portion 52R and the head portion 54R along the axial direction of the mounting portion 50R.

As shown in FIG. 4, the headrest frame 42 includes a headrest frame main body 62 attached to the upper back frame 48 and a shoulder support portion 64 attached to the headrest frame main body 62 to support the shoulders of the occupant.

The headrest frame main body 62 has a pair of left and right legs 66L and 66R, and a base portion 68 extending upward from these legs 66L and 66R. The base portion 68 and the left and right leg portions 66L and 66R are formed by bending one frame into a substantially U-shape that opens downward.

As shown in FIGS. 4 and 6A, engaging grooves 92L and 92R are provided on the inside (right side) of the left and right pair of legs 66L and 66R in the seat width direction. Of the engaging grooves 92L and 92R, the engaging portion 104 of the lock mechanism 56, which will be described later, is inserted into the left engaging groove 92L.

The base portion 68 includes left and right inclined portions 72L and 72R extending upward from the upper ends of the left and right leg portions 66L and 66R and inclined inward in the seat width direction, and left and right strut portions extending upward from the upper ends of these inclined portions 72L and 72R. It has 74L and 74R and a top portion 76 that connects the upper ends of these support columns 74L and 74R to each other.

The shoulder support portion 64 extends from the base portion 68 in the seat width direction. Specifically, the shoulder support portion 64 includes a support portion 78L located behind the left shoulder of the occupant, a support portion 78R located behind the right shoulder of the occupant, and an intermediate connecting portion connecting these support portions 78L and 78R to each other. Equipped with 80.

These support portions 78L, 78R and the intermediate connecting portion 80 are integrally formed by bending a pipe made of a metal material such as iron, iron alloy, aluminum, or aluminum alloy, for example. In other words, the shoulder support portion 64 is continuously formed by one frame.

In the shoulder support portion 64, the left support portion 78L has an upper frame 82L extending from one end of the intermediate connecting portion 80 toward the outside (left side) in the seat width direction and a connecting portion (folded back near the left end portion of the upper back frame 48). A folded portion) 84L and a lower frame 86L extending from the connecting portion 84L toward the inside (right side) in the seat width direction beyond the leg portion 66L and extending between the leg portion 66L and the leg portion 66R are included.

The support portion 78L further includes a rising portion 88L extending upward from the tip of the lower frame 86L, and an intermediate frame 90L extending slightly upward from the upper portion of the rising portion 88L in the seat width direction (left side).

At the right end portion (inner end portion in the seat width direction) of the upper frame 82L, an upper jointed portion 93L bent upward is formed. At the left end portion (outer end portion in the seat width direction) of the intermediate frame 90L, a lower joint portion 94L bent upward along the leg portion 66L is formed.

As shown in FIGS. 3, 7 and 8, the upper jointed portion 93L is attached to the inclined portion 72L of the base portion 68, and the lower joined portion 94L is attached to the leg portion 66L of the headrest frame main body 62. There is. In this embodiment, the upper jointed portion 93L and the lower joined portion 94L are joined to the inclined portion 72L and the leg portion 66L by welding, respectively.

The right support portion 78R has the same configuration as the left support portion 78L. For this reason, detailed description will be omitted by adding R to the end of the same reference number as the corresponding component of the support unit 78L on the left side to the component of the support unit 78R on the right side.

Next, the lock mechanism 56 will be described.

As shown in FIGS. 6A and 6B, the head 54L of the left mounting portion 50L has a storage chamber 96 for accommodating the lock mechanism 56 and an opening 98 which communicates with the storage chamber 96 and opens outward in the seat width direction. And are formed.

The lock mechanism 56 includes a plate-shaped portion 100 slidably arranged in the accommodation chamber 96 in the seat width direction, an operating portion 102 that is provided in the plate-shaped portion 100 and is exposed from the opening 98, and a leg portion. It has an engaging portion 104 that can be inserted into the engaging groove 92L of 66L, and an urging member 106 provided in the plate-shaped portion 100.

The plate-shaped portion 100 is formed with an insertion hole 108 through which the leg portion 66L can be inserted.

The operation unit 102 is formed in a size that can be operated by the fingers of an occupant (not shown), and bulges above the plate-shaped portion 100.

The engaging portion 104 has a quadrangular cross section and is fixed to the plate-shaped portion 100 in a state of being located in the insertion hole 108. Further, the engaging portion 104 is displaced to the engaging position inserted into the engaging groove 92L and the disengaging position separated from the engaging groove 92L by sliding together with the plate-shaped portion 100.

The urging member 106 is arranged between the inner wall surface in the seat width direction and the plate-shaped portion 100 constituting the accommodation chamber 96, and urges the plate-shaped portion 100 toward the operating portion 102. As a result, it is possible to prevent the engaging portion 104 at the engaging position from being displaced to the disengaging position. The urging member 106 is composed of a coil spring. However, the urging member 106 may be an elastic member such as rubber, a leaf spring, or the like.

When the leg portion 66L is attached to such an attachment portion 50L, first, the operation portion 102 is pressed toward the plate-shaped portion 100 side to displace the engaging portion 104 to the disengagement position. Next, in this state, the leg portion 66L is inserted into the hole 50La of the mounting portion 50L.

Then, when the engaging groove 92L of the leg portion 66L reaches the same height position as the engaging portion 104, the pressure of the operating portion 102 is released. Then, the plate-shaped portion 100 is displaced toward the operating portion 102 by the urging force of the urging member 106, and the engaging portion 104 is displaced from the disengaging position to the engaging position and inserted into the engaging groove 92L.

As a result, the leg portion 66L is fixed to the mounting portion 50L, and the headrest frame 42 is supported by the upper back frame 48.

When the leg portion 66L is removed from the mounting portion 50L, the leg portion 66L is moved in a state where the operating portion 102 is pressed toward the plate-shaped portion 100 and the engaging portion 104 is displaced from the engaging position to the disengaging position. Pull up. As a result, the leg portion 66L can be pulled out from the hole 50La of the mounting portion 50L.

In the present embodiment, the head 54L of the mounting portion 50L is provided with a storage chamber 96 for accommodating the lock mechanism 56 as described above, and the operating portion 102 is exposed from the opening 98, so that a predetermined radius of curvature is provided. It is a protrusion (convex part) that is less than.

Here, FIG. 5 shows a state (plan view) in which the headrest frame 42 having the shoulder support portion 64 is viewed from above.

Further, FIG. 7 shows a state in which the headrest frame 42 is viewed from the front (front view), and FIG. 8 shows a state in which the headrest frame 42 is viewed from the back (rear view). Further, FIG. 9 shows a state in which the headrest frame 42 is viewed from the left side surface (left side view).

As shown in FIGS. 5, 7 to 9, in the left support portion 78L, the lower jointed portion 94L is joined to the front side of the leg portion 66L in the front-rear direction by welding. Further, the rising portion 88L, the lower frame 86L, and the connecting portion 84L are all arranged on the front side in the front-rear direction of the seat (on the front side of the leg portion 66L when viewed from the front of the seat) with respect to the leg portion 66L.

Similarly, in the support portion 78R on the right side, the lower jointed portion 94R is joined to the front side of the leg portion 66R in the front-rear direction by welding. Further, the rising portion 88R, the lower frame 86R, and the connecting portion 84R are all arranged on the front side in the front-rear direction of the seat (on the front side of the leg portion 66R when viewed from the front of the seat) with respect to the leg portion 66R.

Therefore, the lower frames 86L and 86R are arranged on the front side in the front-rear direction of the seat with respect to the pair of legs 66L and 66R and the headrest frame main body 62. Further, the lower frames 86L and 86R are arranged on the front side in the front-rear direction of the seat (the front side of the legs 66R and 66L when viewed from the front of the seat) with respect to the heads 54L and 54R of the mounting portions 50L and 50R, that is, the protrusions.

Further, as shown in FIGS. 5, 7 to 9, the lower frames 86L and 86R are for vehicles when the legs 66L and 66R of the headrest frame 42 are attached to the attachment portions 50L and 50R of the seat back frame 40. It is arranged at a position where it overlaps with the mounting portions 50L and 50R in the front view of the seat 10.

In other words, the heads 54L and 54R of the mounting portions 50L and 50R are arranged at positions deeper (rear position) than the lower frames 86L and 86R of the headrest frame 42 in the front view of the vehicle seat 10.

As described above, in this embodiment, the lower frames 86L and 86R, the rising portions 88L and 88R and the intermediate frame are located between the head and shoulder portions of the occupant seated on the vehicle seat 10 and the mounting portions 50L and 50R. 90L and 90R are arranged. Therefore, even if a protective member such as a guard cap having a predetermined radius of curvature or more is not separately attached to the heads 54L and 54R of the mounting portions 50L and 50R, the occupants can start from the heads 54L and 54R of the mounting portions 50L and 50R. The head and shoulders are protected.

As described above, the vehicle seat frame 36 according to the embodiment of the present invention includes the seat back frame 40, a pair of mounting portions 50L and 50R provided on the upper portion of the seat back frame 40, and the mounting portions 50L. A vehicle seat frame 36 having a headrest frame 42 that can be attached to and detached from the 50R, and the headrest frame 42 has a pair of leg portions 66L and 66R that can be inserted and removed from the pair of mounting portions 50L and 50R. It is composed of a headrest frame main body (main body portion) 62 extending upward from the pair of leg portions 66L and 66R, and a shoulder support portion 64 attached to the headrest frame main body 62.

The shoulder support portion 64 is located below the upper frames 82L and 82R, which are attached to the headrest frame body 62 and extend outward in the seat width direction, and the headrest frame body 62. Connecting portions (folded portions) 84L, 84R that connect the lower frames 86L, 86R that are attached and extend outward in the seat width direction, and the outer ends of the upper frames 82L, 82R and the lower frames 86L, 86R in the seat width direction. The lower frames 86L and 86R are positioned so as to overlap the mounting portions 50L and 50R in front view of the seat when the pair of leg portions 66L and 66R are mounted on the mounting portions 50L and 50R. It is arranged on the front side of the mounting portions 50L and 50R.

As described above, in the vehicle seat frame 36 having the shoulder support function, the lower frames 86L and 86R of the shoulder support portion 64 are positioned so as to overlap the mounting portions 50L and 50R when viewed from the front of the seat, and are in front of the mounting portions 50L and 50R. By arranging it on the side, it is possible to protect the occupant from the protrusions (head 54L, 54R) generated on the mounting portions 50L, 50R on the upper part of the seat back frame 40. Further, it is not necessary to attach a separate part such as a guard cap to the heads 54L and 54R of the attachment portions 50L and 50R.

Further, it is preferable that the lower frames 86L and 86R extend from the connecting portions 84L and 84R to the inside of the pair of leg portions 66L and 66R in the seat width direction.

According to such a configuration, it is possible to reliably protect the occupant from the protrusions generated on the mounting portions 50L and 50R on the upper part of the seat back frame 40.

Further, the shoulder support portion 64 further includes rising portions 88L and 88R extending upward from the inner end portions of the lower frames 86L and 86R in the seat width direction and the seat width direction from the upper ends of the rising portions 88L and 88R. The intermediate frames 90L and 90R extending outward are included, and the outer ends of the intermediate frames 90L and 90R in the seat width direction are attached to the pair of legs 66L and 66R.

According to such a configuration, the rising portions 88L and 88R and the intermediate frames 90L and 90R are arranged inside the pair of leg portions 66L and 66R in the seat width direction, so that the mounting portion 50L on the upper portion of the seat back frame 40 , It is possible to more reliably protect the occupant from the protrusion (head 54L) generated in 50R.

Further, the lower frames 86L and 86R are arranged on the front side in the front-rear direction of the seat with respect to the pair of legs 66L and 66R.

According to such a configuration, the shoulder portion of the occupant can be stably supported.

In the above-described embodiment, the example in which the lock mechanism 56 is provided on the head 54L of the left mounting portion 50L is shown, but even if the locking mechanism 56 is provided on the head 54R of the right mounting portion 50R. Good. Further, even when the lock mechanism 56 is provided on both the heads 54L and 54R of the mounting portions 50L and 50R, the same effect can be obtained.

Further, when the head 54L of the mounting portion 50L is provided with a mechanism other than the lock mechanism 56 (for example, a rattling prevention mechanism of the headrest frame 42), the head 54L is configured to have a radius of curvature less than a predetermined radius. Even if there is, the same effect can be obtained if the lower frame 86L is arranged at a position overlapping the mounting portion 50L when viewed from the front of the seat.

Further, it goes without saying that the vehicle seat frame 36 according to the present embodiment is not limited to that mounted on an automobile, and may be, for example, a vehicle seat mounted on a train, an airplane, or the like.

The vehicle seat frame according to the present invention is not limited to the above-described embodiment, and of course, various configurations can be adopted without departing from the gist of the present invention.

10 ... Vehicle seat 36 ... Seat frame (Vehicle seat frame)
40 ... Seat back frame 42 ... Headrest frame 50L, 50R ... Mounting part (headrest holder)
62 ... Headrest frame body (main body)
64 ... Shoulder support 66L, 66R ... Leg 82L, 82R ... Upper frame 84L, 84R ... Connecting part (folded part)
86L, 86R ... Lower frame

Claims (4)

In a vehicle seat frame having a seat back frame, a pair of mounting portions provided on the upper portion of the seat back frame, and a headrest frame that can be attached to and detached from the mounting portions.
The headrest frame is
A pair of legs that can be inserted and removed from the pair of mounting parts,
A main body extending upward from the pair of legs and
The shoulder support part attached to the main body part and
Consists of
The shoulder support part
An upper frame that is attached to the main body and extends outward in the seat width direction,
A lower frame that is located below the upper frame and is attached to the main body and extends outward in the seat width direction.
A connecting portion that connects the upper frame and the outer ends of the lower frame in the seat width direction, and
Have,
The lower frame is a vehicle seat frame characterized in that when the pair of legs are attached to the attachment portion, the lower frame is arranged at a position overlapping the attachment portion in front view of the seat and is arranged on the front side. In the vehicle seat frame according to claim 1,
The lower frame is a vehicle seat frame that extends from the connecting portion to the inside of the pair of legs in the seat width direction. In the vehicle seat frame according to claim 2,
The shoulder support portion further
A rising portion extending upward from the inner end in the seat width direction of the lower frame, and a rising portion.
An intermediate frame extending outward in the seat width direction from the upper end of the rising portion, and
Including
A vehicle seat frame characterized in that the outer end portion of the intermediate frame in the seat width direction is attached to the pair of legs. In the vehicle seat frame according to any one of claims 1 to 3.
The lower frame
A vehicle seat frame characterized in that it is arranged on the front side in the front-rear direction of the seat with respect to the pair of legs.

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