JP7192540B2 - cushion frame - Google Patents

Description

The present disclosure relates to a cushion frame applied to a vehicle seat mounted on a vehicle.

For example, the seat cushion of the vehicle seat described in Patent Document 1 changes the seat surface angle while sliding toward the seat front side with respect to the seating position. Specifically, the vehicle seat includes a support portion that rotatably supports the seat cushion, a slide device that allows the support portion to slide, and the like.

JP-A-64-83425

The present disclosure discloses an example of a cushion frame capable of changing the seat surface position of the seat cushion with a configuration different from the configuration described in Patent Document 1.

A cushion frame applied to a vehicle seat mounted in a vehicle desirably has at least one of the following constituent requirements, for example.
That is, the constituent elements are a side frame (2) extending in the longitudinal direction of the seat and a first link (4) supporting the side frame (2), the upper end side of which is rotatable toward the front end side of the side frame (2). A first link (4) whose lower end side is indirectly or directly rotatably connected to the vehicle, and a side frame (2) arranged on the rear side of the seat from the first link (4) A supporting second link (6), the upper end of which is rotatably connected to the side frame (2) and the lower end of which is indirectly or directly rotatably connected to the vehicle. A drive unit (8) capable of exerting a driving force for moving the side frame (2) upward from the seating position to bring the side frame (2) to the boarding/alighting position, and the side frame (2) to the seating position. and a lock mechanism (10) that restricts upward displacement of the side frame (2) at certain times.

Accordingly, in the vehicle seat employing the cushion frame, the seat cushion is held at the seating position by the lock mechanism (10). Therefore, when the seat cushion is in the seating position, even if a large load acts on the vehicle seat, the seat cushion is prevented from being displaced upward.

When the driving portion (8) operates in a state where the lock mechanism (10) is released, the seat cushion is displaced upward to the entry/exit position. Since the position of the seat surface of the boarding position is higher than that of the sitting position, the seated person can easily board and alight the vehicle by using the seat cushion as the boarding position.

In other words, when the seating position is low, the seated occupant has to move up and down greatly when getting on and off the vehicle, which deteriorates the ease of getting on and off the vehicle. However, since the seat surface position at the boarding/alighting position is higher than the seat surface position at the sitting position, the seated occupant does not need to move up and down significantly when boarding/alighting. In addition, the vehicle seat employing the cushion frame can improve the ease of getting in and out of the vehicle.

Note that the cushion frame may have, for example, the following configuration.
That is, the lock mechanism (10) restricts the angle between the side frame (2) and the first link (4) or the second link (6) from increasing, thereby preventing upward displacement of the side frame (2). should be regulated. Thereby, the configuration of the lock mechanism (10) can be simplified.

The locking mechanism (10) consists of a lock pin (101) provided on the first link (4) or the second link (6) and a hook (102) connected to the side frame (2). It is desirable to have a hook (102) displaceable between an engaged position where it can be engaged with (101) and a non-engaged position where the engagement can be released. This simplifies the configuration of the lock mechanism (10).

A connecting portion between the first link (4) and the side frame (2) is defined as a first connecting portion (41), and a connecting portion between the second link (6) and the side frame (2) is defined as a second connecting portion (61). , the first link (4) and the second link (6) are such that when the side frame (2) moves upward from the seating position to the boarding/alighting position, the amount of upward displacement of the second connecting portion (61) is the second It is desirable to be configured to be greater than the amount of upward displacement of one connecting portion (41).

As a result, when the side frame (2) moves upward from the seating position to the boarding/alighting position, the rear end side of the side frame (2) moves upward more than the front end side. Therefore, the vehicle seat employing the cushion frame can improve the ease of getting in and out of the vehicle.

The drive unit (8) includes a sector gear (81) that rotates integrally with the first link (4), and a gear (82) that is fixed to the side frame (2) and meshes with the sector gear (81). It is desirable to have an electric motor (83) that imparts rotational force to the .

A flange portion (101B) projecting from the lock pin (101) is provided on the longitudinal end side of the lock pin (101). When the hook (102) is engaged with the lock pin (101), the hook (102) is connected to the flange (101B) and the lock link (6). ) should be located between

As a result, even if a load acts on the side frame (2) and at least one of the lock link (6) and the side frame (2) is deformed, the hook (102) is disengaged from the lock pin (101). It is suppressed.

A tapered portion (101C) is preferably provided at a portion of the flange portion (101B) that faces the lock link (6) so that the distance from the lock link (6) increases toward the tip in the projecting direction. Thereby, the hook (102) is guided to the engaging position by the tapered portion (101C). Therefore, the hook (102) can be reliably engaged with the locking pin (101).

Preferably, a locator (102D) is provided to position the lock link (6) relative to the sideframe (2) when the sideframe (2) is in the seated position. This ensures that the hook (102) engages the locking pin (101).

The drive part (8) has a sector gear (81), an electric motor (83), and a drive spring (84) that exerts part of the drive force. Thereby, an increase in size of the electric motor (83) can be suppressed.

Incidentally, the symbols in the parentheses above are examples showing the correspondence with specific configurations and the like described in the embodiments described later, and the present disclosure is limited to the specific configurations and the like indicated by the symbols in the parentheses. not something.

It is a figure which shows the cushion frame which concerns on 1st Embodiment. It is a figure which shows the cushion frame which concerns on 1st Embodiment. 4 is a partially exploded view of the cushion frame according to the first embodiment; FIG. It is a figure which shows the cushion frame which concerns on 1st Embodiment. It is a figure which shows the cushion frame which concerns on 1st Embodiment. FIG. 4 is a view showing the driving portion of the cushion frame according to the first embodiment, with a part of the side frame cut away; FIG. 4 is a view showing the locking mechanism of the cushion frame according to the first embodiment, with a part of the side frame cut away; FIG. 4 is a diagram showing a locking mechanism of the cushion frame according to the first embodiment; FIG. 10 is a diagram showing a locking mechanism of a cushion frame according to the second embodiment; FIG. 11 is a diagram showing a positioning portion of a cushion frame according to a third embodiment;

The following "embodiment of the invention" shows an example of an embodiment belonging to the technical scope of the present disclosure. In other words, the matters specifying the invention described in the claims are not limited to the specific configurations, structures, etc. shown in the following embodiments.

The present embodiment is an example in which the cushion frame according to the present disclosure is applied to a seat mounted on a vehicle such as a vehicle (hereinafter referred to as a vehicle seat). Directional arrows and slanted lines in each drawing are provided to facilitate understanding of the relationship between the drawings and the shapes of members or parts.

Therefore, the cushion frame is not limited to the direction shown in each drawing. The direction shown in each drawing is the direction in which the vehicle seat according to the present embodiment is assembled to the vehicle. The hatched figures are not cross-sectional views.

At least one member or portion described with at least a reference numeral is provided unless otherwise specified as "one" or the like. In other words, two or more members may be provided unless there is a notice such as "one". The vehicle seats and cushion frames shown in this disclosure include at least components such as the members or portions labeled and described.

(First embodiment)
1. Outline of Cushion Frame A cushion frame 1 shown in FIG. 1 is applied to a seat cushion of a vehicle seat. Specifically, the seat cushion is a part for supporting the buttocks of the seated person. The cushion frame 1 constitutes the skeleton of the seat cushion.

As shown in FIG. 2, the cushion frame 1 includes at least side frames 2, 3, first links 4, 5, second links 6, 7, drive units 8, 9, lock mechanisms 10, 11, and the like.

The cushion frame 1 is changeable between a "seatable state (see FIG. 1)" and a "getting on and off state (see FIG. 2). In the seatable state, the user of the vehicle seat is seated. The ready-to-ride state is a state (position) suitable for the user to get on and off the vehicle.

The cushion frame 1 according to this embodiment is fixed to the vehicle via two slide devices 30 and 31 . Each slide device 30, 31 is a mechanism that enables the cushion frame 1 to slide in the seat front-rear direction.

Each slide device 30, 31 comprises fixed rails 30A, 31A fixed to the vehicle, movable rails 30B, 31B to which the cushion frame 1 is mounted, and the like. Note that the movable rail 30B is slidable with respect to the fixed rail 30A. The movable rail 31B is slidable with respect to the fixed rail 31A.

2. Details of Cushion Frame The cushion frame 1 has a substantially symmetrical structure. The following description is mainly about the side frame 2 and the like (see FIG. 3) arranged at one end in the seat width direction (left end in this embodiment).

<Side frame, first link and second link>
The side frame 2 constitutes a lower arm extending in the longitudinal direction of the seat (see FIG. 1). The first link 4 and the second link 6 are members for supporting the side frame 2 . The second link 6 is arranged on the seat rear side from the first link 4, as shown in FIG.

Upper end sides of the first link 4 and the second link 6 are rotatably connected to the side frame 2 . Specifically, the upper end side of the first link 4 is connected to the front end side of the side frame 2 . The connecting portion between the first link 4 and the side frame 2 is hereinafter referred to as a first connecting portion 41 .

The upper end side of the second link 6 is connected to the side frame 2 on the seat rear side of the first connecting portion 41 and on the seat front side of the rear end of the side frame 2 . The connecting portion between the second link 6 and the side frame 2 is hereinafter referred to as a second connecting portion 61 .

The second connecting portion 61 is located closer to the first connecting portion 41 than the seat belt connecting portion 2B. The seat belt connecting portion 2B is a member for connecting the side frame 2 and a seat belt (not shown).

The lower end sides of the first link 4 and the second link 6 are rotatably connected to the vehicle indirectly or directly. In this embodiment, the lower end sides of the first link 4 and the second link 6 are rotatably connected to the movable rail 30B, that is, the slide device 30 via brackets 30C and 30D.

Therefore, in this embodiment, the side frame 2, the first link 4 and the second link 6 constitute a four-bar link mechanism. Therefore, for example, when a force that changes the angle formed by the side frame 2 and the first link 4 (referred to as the first link angle) acts on the side frame 2 and the first link 4, the side frame 2, that is, the seat cushion moves up and down. Displace.

Similarly, for example, when a force that changes the angle formed by the side frame 2 and the second link 6 (referred to as a second link angle) acts on the side frame 2 and the second link 6, the seat cushion is vertically displaced.

Hereinafter, the position of the side frame 2 when the cushion frame 1 is in a seatable state is referred to as a seated position. The position of the side frame 2 when the cushion frame 1 is ready for boarding/alighting is called a boarding/alighting position.

In the first link 4 and the second link 6 according to the present embodiment, when the side frame 2 moves upward from the seating position to the boarding/alighting position, the amount of upward displacement of the second connecting portion 61 is equal to that of the first connecting portion 41. It is configured to be larger than the amount of upward displacement (see FIGS. 4 and 5).

Specifically, the longitudinal dimension of the second link 6 is larger than the longitudinal dimension of the first link 4 . The longitudinal dimension of the first link 4 is the distance from the center of rotation of the first connecting portion 41 to the center of rotation of the connection between the first link 4 and the movable rail 30B.

The longitudinal dimension of the second link 6 is the distance from the center of rotation of the second connecting portion 61 to the center of rotation of the connection between the second link 6 and the movable rail 30B. The amount of upward displacement refers to the amount of displacement in the vertical direction (hereinafter referred to as displacement direction) perpendicular to the longitudinal direction of the movable rail 30B.

In this embodiment, the longitudinal direction of the side frame 2 at the seated position is substantially parallel to the longitudinal direction of the movable rail 30B (see FIG. 4). The longitudinal direction of the side frame 2 at the boarding/alighting position is inclined with respect to the longitudinal direction of the movable rail 30B (see FIG. 5). Specifically, the rear end position of the side frame 2 is positioned above the front end position of the side frame 2 at the boarding/alighting position.

Incidentally, the first link 4 according to the present embodiment has a position where the longitudinal direction of the first link 4 is tilted toward the front side of the seat with respect to the vertical direction, and a position where the longitudinal direction of the first link 4 is tilted toward the rear side of the seat with respect to the vertical direction. position. Hereinafter, the position of the first link 4 when the longitudinal direction of the first link 4 coincides with the vertical direction is referred to as the upright position.

In other words, when the side frame 2 is in the seated position, the first link 4 is inclined forward of the seat from the upright position. When the side frame 2 is at the boarding/alighting position, the first link 4 is inclined toward the rear side of the seat from the standing position. That is, the first link angle varies in a range from acute angles to obtuse angles.

Regardless of the position of the side frame 2, the second link 6 is inclined toward the front side of the seat from the position where the longitudinal direction of the second link 6 coincides with the vertical direction. Therefore, the second link angle is less than 90 degrees regardless of the position of the side frame 2 .

<Drive unit>
The drive unit 8 is a mechanism capable of exerting a driving force for moving the side frame 2 upward from the seating position to bring the side frame 2 to the boarding/alighting position. The drive unit 8 according to the present embodiment can exert a driving force that increases at least the first link angle.

The drive unit 8 includes at least a sector gear 81, a gear 82, an electric motor 83, a drive spring 84, and the like, as shown in FIG. The sector gear 81 is a sector gear that rotates integrally with the first link 4 .

The sector gear 81 according to this embodiment is an integrally molded product with the first link 4 integrally molded together with the first link 4 . A gear 82 is a pinion meshing with the sector gear 81 . The electric motor 83 is a drive source that applies rotational force to the gear 82 .

The electric motor 83 is fixed to the side frame 2 via a motor bracket 85 (see FIG. 3). A rotational force output from the electric motor 83 is transmitted to the gear 82 via a speed reduction mechanism 86 composed of a plurality of gears.

The drive spring 84 exerts a part of the drive force for setting the side frame 2 to the boarding/alighting position. In other words, the drive spring 84 is a spring for assisting that exerts a driving force in cooperation with the electric motor 83 when the side frame 2 is set to the getting on/off position.

Note that the electric motor 83 according to the present embodiment can rotate forward and backward. That is, when the electric motor 83 rotates forward, the side frame 2 is positioned at the boarding/alighting position. The side frame 2 on which the electric motor 83 rotates in the reverse and forward directions becomes the seated position.

<Lock Mechanism>
The lock mechanism 10 is a mechanism that restricts upward displacement of the side frame 2 when the side frame 2 is in the seated position. Specifically, as shown in FIG. 7, the lock mechanism 10 according to the present embodiment restricts the upward displacement of the side frame 2 by restricting the second link angle from increasing.

The lock mechanism 10 includes at least a lock pin 101, a hook 102, a hook spring 103, a hook control mechanism 104 (see FIG. 4), and the like. A lock pin 101 is provided on the second link 6 .

<Lock pin, hook, etc.>
The lock pin 101 has at least an engaging portion 101A and a flange portion 101B, as shown in FIG. The engaging portion 101A is a columnar or cylindrical portion having a central axis aligned with the seat width direction, and is fixed to the second link 6 .

The flange portion 101B is a portion provided on the longitudinal end portion side of the lock pin 101 and protrudes radially from the engaging portion 101A. The flange portion 101B according to the present embodiment is a brim-shaped portion protruding from the engaging portion 101A over the entire circumference.

The engaging portion 101A and the flange portion 101B are integral parts made of metal. The lock pin 101 according to this embodiment is fixed to the second link 6 by a male threaded portion 101C provided on the engaging portion 101A.

In a state where the hook 102 is connected to the side frame 2, the engaging portion 101A can be engaged at an engaging position (the position indicated by the solid line in FIG. 7) and at a non-engaging position (the position indicated by the solid line in FIG. 7) is a member that can be displaced between.

Specifically, as shown in FIG. 8, the hook 102 is rotatably connected to the side frame 2 via a support shaft 102A having a central axis aligned with the seat width direction. One end side of the support shaft 102A is supported by the side frame 2 . The other end of the support shaft 102A is supported by a shaft bracket 102B.

The axle bracket 102B is fixed to the side frame 2. As shown in FIG. The position of the hook 102 in the seat width direction is determined by being sandwiched between the large diameter portion 102C of the support shaft 102A and the shaft bracket 102B.

When the hook 102 is engaged with the engaging portion 101A, the hook 102 is positioned between the flange portion 101B and the second link 6 as shown in FIG. A tapered portion 101C is provided at a portion of the flange portion 101B that faces the second link 6 .

The tapered portion 101C is configured with an inclined surface that is inclined such that the distance from the second link 6 increases toward the tip in the projecting direction. Note that the tapered portion 101C according to the present embodiment is configured in a conical tapered shape.

<Hook spring and hook control mechanism, etc.>
The hook spring 103 is an elastic member that applies an elastic force to the hook 102 to maintain the hook 102 at the engaging position, as shown in FIG. The hook spring 103 according to this embodiment is configured by a spiral spiral spring.

The hook control mechanism 104 sets the hook 102 to the non-engaging position before the side frame 2 starts to move upward from the seated position, and when the hook 102 reaches the non-engaging position, the side frame 2 moves upward from the seated position. The hook 102 is later returned to the engaging position.

As shown in FIG. 4, the hook control mechanism 104 according to this embodiment includes at least a release lever 104A, an operation cable 104B, an actuator 104C (see FIG. 1), and the like. The operation cable 104B is composed of a wire that transmits tension.

The release lever 104A can transmit to the hook 102 a force that rotates the hook 102 toward the non-engagement position. Note that, in this embodiment, when the hook 102 rotates toward the non-engagement position by receiving force from a source other than the release lever 104A, the force is not transmitted to the release lever 104A.

In other words, between the release lever 104A and the hook 102, there is a one-way mechanism (not shown) that transmits rotational force from the release lever 104A to the hook 102 and does not transmit rotational force from the hook 102 to the release lever 104A. is provided.

One end of the operation cable 104B is connected to the release lever 104A. The other end of the operation cable 104B is connected to the actuator 104C. The actuator 104C pulls the operation cable 104B.

The actuator 104C according to this embodiment is an electric actuator using an electric motor. The operations of the actuator 104C and the electric motor 83 are controlled by a control device (not shown).

The actuator 104C pulls the operation cable 104B to bring the hook 102 into the non-engagement position when the side frame 2 is displaced upward from the seated position. The actuator 104C restores the pulling operation cable 104B when the side frame 2 is in the getting on/off position.

As a result, the hook 102 is returned to the engaging position by the elastic force of the hook spring 103 . At this time, when a force for rotating the hook 102 toward the non-engaging position (hereinafter referred to as hook rotating force) acts on the hook 102, the hook 102 is displaced toward the non-engaging position.

Note that the hook rotation force is generated when the outer edge 102E (hereinafter referred to as cam surface 102E) shown in FIG. 7 and the engaging portion 101A come into contact with each other. The cam surface 102E is an outer edge of the hook 102 located on the opposite side of the center of rotation across the groove 102F.

That is, the groove portion 102F is a substantially U-shaped groove into which the engaging portion 101A can be detachably fitted and which is open on the front side of the seat. The cam surface 102E is configured to generate hook rotation force when the side frame 2 is displaced toward the seating position while the cam surface 102E is in contact with the engaging portion 101A.

<Positioning of the second link when seated>
The cushion frame 1 is provided with a positioning portion 102D (see FIG. 8) that determines the position of the second link 6 with respect to the side frame 2 when the side frame 2 is in the seated position. In this embodiment, the positioning portion 102D is provided at a portion of the shaft bracket 102B that can come into contact with the second link 6, as shown in FIG.

In this embodiment, when the positioning portion 102D and the second link 6 come into contact with each other, the hook 102 is positioned at the engagement position. Then, of the inner walls of the groove portion 102F, the inner wall far from the center of rotation of the hook 102 and the engaging portion 101A are in contact with each other, and the inner wall near the center of rotation and the engaging portion 101A are in non-contact.

3. Operation of Cushion Frame When the user operates a boarding/alighting switch (not shown) while the cushion frame 1 is in a seatable state, first, the actuator 104C is actuated and the hook 102 is displaced to the non-engaging position.

Next, the electric motor 83 rotates forward, and the cushion frame 1 becomes ready for getting on and off. The actuator 104C returns the hook 102 to the engaged position when a predetermined time has elapsed since the hook 102 was in the disengaged position.

When the user operates the boarding/alighting switch when the cushion frame 1 is ready for boarding/alighting, the electric motor 83 is reversed to start lowering the side frames 2 and 3 toward the seating position. At this time, since the hook 102 is in the non-engaging position, the engaging portion 101A contacts the cam surface 102E.

When the side frames 2 and 3 are further lowered toward the seating position while the engaging portion 101A is in contact with the cam surface 102E, the hook rotation force acts on the hook 102, displacing the hook 102 to the non-engaging position. do.

When the engaging portion 101A is fitted into the groove portion 102F, the hook rotating force disappears. Therefore, the hook 102 is displaced to the engaging position by the elastic force of the hook spring 103, and the hook 102 and the lock pin 101 are engaged. becomes.

4. Features of the vehicle seat (especially the cushion frame) according to the present embodiment In the vehicle seat according to the present embodiment, when the side frame 2 is in the seated position, the upward displacement of the side frame 2 is restricted by the lock mechanism 10. be done.

Accordingly, in the vehicle seat, the seat cushion is held at the seating position by the locking mechanism 10 . Therefore, when the seat cushion is in the seating position, even if a large load acts on the vehicle seat, the seat cushion is prevented from being displaced upward.

Incidentally, when the speed reduction ratio of the speed reduction mechanism 86 is large (especially in the case of a speed reduction mechanism including a worm and a worm wheel), it is possible to omit the lock mechanism 10 . However, when the speed reduction ratio is large, it is difficult to quickly displace the cushion frame 1 .

On the other hand, in the vehicle seat according to the present embodiment, a speed reduction ratio that allows the cushion frame 1 to be quickly displaced is selected, and the upward displacement of the seat cushion is restricted by the lock mechanism 10 .

When the driving portion 8 is operated with the lock mechanism 10 released, the seat cushion is displaced upward to the entry/exit position. Since the position of the seat surface of the boarding position is higher than that of the sitting position, the seated person can easily board and alight the vehicle by using the seat cushion as the boarding position.

In other words, when the seating position is low, the seated occupant has to move up and down greatly when getting on and off the vehicle, which deteriorates the ease of getting on and off the vehicle. However, since the seat surface position at the boarding/alighting position is higher than the seat surface position at the sitting position, the seated occupant does not need to move up and down significantly when boarding/alighting. In addition, the vehicle seat employing the cushion frame 1 can improve the ease of getting in and out of the vehicle.

The lock mechanism 10 restricts the upward displacement of the side frame 2 by restricting the angle formed by the side frame 2 and the second link 6 from increasing. Thereby, the configuration of the lock mechanism 10 can be simplified.

The lock mechanism 10 has a lock pin 101 provided on the second link 6 and a hook 102 connected to the side frame 2 . This simplifies the configuration of the lock mechanism 10 .

The first link 4 and the second link 6 are arranged so that the amount of upward displacement of the second connecting portion 61 is larger than the amount of upward displacement of the first connecting portion 41 when the side frame 2 moves upward from the seating position to the getting on/off position. is configured to

As a result, when the side frames 2 move upward from the seating position to the boarding/alighting position, the rear end side of the side frame 2 moves upward more than the front end side. Therefore, the vehicle seat employing the cushion frame 1 can improve the ease of getting in and out of the vehicle.

A flange portion 101B projecting from the lock pin 101 is provided on the longitudinal end portion side of the lock pin 101 . The hook 102 is positioned between the flange portion 101B and the second link 6 when the hook 102 is engaged with the lock pin 101 .

This prevents the hook 102 from coming off the lock pin 101 even when at least one of the second link 6 and the side frame 2 is deformed by a load acting on the side frame 2 .

A portion of the flange portion 101B facing the second link 6 is provided with a tapered portion 101C whose distance from the second link 6 increases toward the tip in the projecting direction. As a result, the hook 102 is guided to the engaging position by the tapered portion 101C. Therefore, hook 102 can reliably engage with lock pin 101 .

A positioning portion 102D is provided for positioning the second link 6 with respect to the side frame 2 when the side frame 2 is in the seated position. This allows the hook 102 to reliably engage with the lock pin 101 .

The hook 102 is connected to the side frame 2 on the seat rear side of the seat belt connecting portion 2B, and the groove portion 102F of the hook 102 opens toward the seat belt connecting portion 2B side.

This prevents the hook 102 from coming off the lock pin 101 even when a load is applied to the side frame 2 via the seat belt, and easily secures a movable space for the hook 102. obtain.

The cushion frame 1 has a symmetrical structure. Therefore, in the cushion frame 1 according to this embodiment, the side frame 3 side also exhibits the same characteristics as described above.
(Second embodiment)
This embodiment, as shown in FIG. 9, is an example using a lock pin 101 without a tapered portion 101C. In addition, the same code|symbol as the above-mentioned embodiment is attached|subjected to the same component as the above-mentioned embodiment. Therefore, redundant description is omitted in this embodiment. The cushion frame 1 according to this embodiment also has a symmetrical structure.

(Third Embodiment)
The positioning portion 102D according to the embodiment described above is provided on the shaft bracket 102B. On the other hand, the positioning portion 2A according to this embodiment is provided on the side frame 2 as shown in FIG. The positioning portion 2</b>A determines the position of the second link 6 with respect to the side frame 2 by contacting the second link 6 .

In addition, the same code|symbol as the above-mentioned embodiment is attached|subjected to the same component as the above-mentioned embodiment. Therefore, redundant description is omitted in this embodiment. The cushion frame 1 according to this embodiment also has a symmetrical structure.

(Other embodiments)
The lock mechanism 10 according to the above-described embodiment regulates the expansion of the second link angle. However, the present disclosure is not so limited. That is, the disclosure may be, for example, a configuration that regulates the first link angle, or a configuration in which the lock pin 101 is provided on the slide device 30 or the vehicle and the hook 102 is provided on the side frame 2 .

The lock mechanism 10 according to the above embodiment has a configuration in which the second link 6 is provided with the lock pin 101 and the side frame 2 is provided with the hook 102 . However, the present disclosure is not so limited. That is, according to the disclosure, for example, the side frame 2 may be provided with the lock pin 101 and the second link 6 may be provided with the hook 102 .

The lock mechanism 10 according to the above-described embodiment has a configuration in which the hook 102 engages with the lock pin 101 . However, the present disclosure is not so limited. That is, according to the disclosure, for example, the lock mechanism 10 may be configured with a bolt passing through the side frame 2 and the first link 4 or the second link 6 .

In the above-described embodiment, the first link 4 and the second link 6 are such that when the side frame 2 moves upward from the seating position to the boarding/alighting position, the amount of upward displacement of the second connecting portion 61 causes the first connecting portion 41 to rise. It was configured to be greater than the amount of displacement. However, the present disclosure is not so limited.

That is, the disclosure includes, for example, a configuration in which the amount of upward displacement of the second connecting portion 61 and the amount of upward displacement of the first connecting portion 41 are the same, or the amount of upward displacement of the second connecting portion 61 is may be smaller than the upward displacement amount of .

The lock pin 101 according to the above embodiment was provided with the flange portion 101B. However, the present disclosure is not so limited. That is, the disclosure may be, for example, the lock pin 101 without the flange portion 101B as long as the size of the engaging portion 101A in the central axis direction is sufficient.

In the embodiment described above, the positioning portions 102D and 2A are provided for positioning the second link 6 with respect to the side frame 2 when the side frame 2 is in the seated position. However, the present disclosure is not so limited. That is, the disclosure may be a configuration in which the positioning portions 102D and 2A are eliminated, for example.

The drive part 8 according to the embodiments described above had a drive spring 84 . However, the present disclosure is not so limited. That is, the disclosure may be configured without the drive spring 84, for example.

The lock pin 101 according to the embodiment described above is fixed to the second link 6 by the male threaded portion 101C provided in the engaging portion 101A. However, the present disclosure is not so limited. That is, according to the disclosure, for example, the lock pin 101 may be fixed to the second link 6 by welding or caulking.

The lock mechanism 10 according to the embodiment described above is configured to be unlocked by the actuator 104C. However, the present disclosure is not so limited. That is, the disclosure may be, for example, a configuration in which the release lever 104A is manually operated via an operation cable, link, or the like.

In the embodiment described above, the vehicle seat according to the present disclosure is applied to the vehicle. However, the application of the invention disclosed in this specification is not limited to this, and can also be applied to seats used in vehicles such as railway vehicles, ships and aircraft, and stationary seats used in theaters, homes, etc. Applicable.

Furthermore, the present disclosure is not limited to the above-described embodiments as long as it conforms to the gist of the disclosure described in the above-described embodiments. Therefore, in the configuration in which at least two of the above-described embodiments are combined, or in the above-described embodiments, any one of the illustrated constituent elements or the constituent elements described with reference numerals is abolished. It may be configured as

DESCRIPTION OF SYMBOLS 1... Cushion frame 2... Side frame 4... 1st link 6... 2nd link 8... Drive part 10... Lock mechanism 101... Lock pin 102... Hook

Claims (6)

In a cushion frame applied to a vehicle seat,
a side frame extending in the longitudinal direction of the seat;
a first link supporting the side frame, the first link having an upper end rotatably connected to the front end of the side frame and a lower end rotatably connected to the vehicle indirectly or directly; ,
A second link that is arranged on the rear side of the seat relative to the first link and supports the side frame, the upper end of which is rotatably connected to the side frame, and the lower end of which rotates indirectly or directly with respect to the vehicle. a second link operably connected;
a driving unit capable of exerting a driving force for moving the side frame upwardly from the seating position to bring the side frame to the boarding/alighting position;
A lock pin provided on the first link or the second link, and a hook connected to the side frame, the engagement position where the lock pin can be engaged and the engagement where the engagement can be released. a locking mechanism having a hook that can be displaced between the mating position and the side frame, the locking mechanism restricting upward displacement of the side frame when the side frame is in the seating position ;
Positioning for determining the position of the lock link with respect to the side frame when the side frame is in the seated position when the link provided with the lock pin of the first link and the second link is the lock link. Department and
with
The locking mechanism is a cushion frame that restricts an upward displacement of the side frame by restricting an angle between the side frame and the first link or the second link from increasing . A flange portion protruding from the lock pin is provided on the longitudinal end side of the lock pin ,
2. The cushion frame of claim 1 , wherein the hook is positioned between the flange portion and the lock link when the hook is engaged with the lock pin. 3. The cushion frame according to claim 2 , wherein a portion of the flange portion facing the lock link is provided with a tapered portion in which the distance from the lock link increases toward the tip in the projecting direction. When the connecting portion between the first link and the side frame is defined as a first connecting portion, and the connecting portion between the second link and the side frame is defined as a second connecting portion,
In the first link and the second link, when the side frame moves upward from the seating position to the boarding/alighting position, the amount of upward displacement of the second connecting portion is greater than the amount of upward displacement of the first connecting portion. 4. The cushion frame according to any one of claims 1 to 3, which is configured to: The drive unit
5. The sector gear according to any one of claims 1 to 4, further comprising: a sector gear that rotates integrally with the first link; and an electric motor that is fixed to the side frame and applies rotational force to a gear meshing with the sector gear. Cushion frame as described. 6. The cushion frame according to claim 5, wherein the drive section has a drive spring that exerts part of the drive force in addition to the sector gear and the electric motor.

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