JP7388259B2 - release handle - Google Patents

Description

The present disclosure relates to release handles. The release handle is a member that is applied to a slide device that slidably supports a vehicle seat and is operated to release a locked state in which sliding is restricted.

For example, the release handle described in Patent Document 1 is intended to prevent the release handle from being damaged and unintentionally released from the locked state when the vehicle is involved in a side collision. .

JP2018-202890A

The present disclosure discloses an example of a release handle that can prevent a slide device from being unlocked when a large external force is applied to a handle portion (a portion operated by a user) of the release handle.

For example, it is desirable that a release handle applied to a slide device that slidably supports a vehicle seat and operated to release a locked state in which the slide is restricted has at least one of the following configuration requirements. .

In other words, the constituent elements are a mounting part (15) that can be mounted on the slide device and is substantially parallel to the longitudinal direction of the slide device when mounted, and a handle part that receives the operating force (Hf). (16), which has a grip part (17) extending in a direction intersecting the longitudinal direction of the mounting part (15) and is capable of transmitting the operating force (Hf) to the mounting part (15). ), and a fragile part (19) provided on the mounting part (15) side of the handle part (16), which has a lower rigidity than the handle part (16) or the mounting part (15). ).

As a result, in the release handle, when a large external force is applied to the handle portion (16), the fragile portion (19) is preferentially deformed to a greater extent than other parts, so that the energy input to the release handle is (19).

This reduces the energy input to the slide device. Therefore, since damage to the slide device is suppressed, unintentional release of the locked state can be suppressed.

Note that the release handle may have the following configuration.

In other words, a cross section of the fragile portion (19) parallel to a virtual plane intersecting the longitudinal direction of the mounting portion (15) and the gripping portion (17) is defined as a cross section of the fragile portion (Cs). The section modulus around the first neutral axis (Na1) in the cross section (Cs) of the section is the first section modulus (Z1), and the section modulus around the second neutral axis (Na2) in the cross section (Cs) of the weak section is the section modulus around the second neutral axis (Na2). 2 section modulus (Z2), the first section modulus (Z1) is larger than the second section modulus (Z2), and the angle between the first neutral axis (Na1) and the operating force (Hf) is It is desirable that the angle is different from the angle formed by the neutral axis (Na2) of No. 2 and the operating force (Hf).

As a result, for example, the following configuration may be established. In other words, this configuration means that during normal use, an operating force acts in a direction substantially perpendicular to the first neutral axis (Na1), and when a large external force acts on the handle part (16), such as during a collision. is a configuration in which the external force acts in a direction substantially perpendicular to the second neutral axis (Na2).

With this configuration, deformation of the release handle (fragile portion (19)) is suppressed during normal use, and when a large external force is applied to the handle portion (16) during a collision, etc. , the fragile portion (19) can be reliably deformed.

The fragile portion (19) is provided on the end side in the extending direction of the gripping portion (17), and there is a portion between the fragile portion (19) and the mounting portion (15). A connecting portion (18) is provided that extends in the longitudinal direction and in a direction intersecting the extending direction of the gripping portion (17) and connects the fragile portion (19) and the attachment portion (15), and has a first neutral axis ( Na1) is a neutral axis perpendicular to a predetermined tangential direction, the second neutral axis (Na2) is a neutral axis perpendicular to a predetermined direction of external force, and the tangential direction is a neutral axis perpendicular to a predetermined tangential direction; 15) An imaginary circle (So) whose center is the tip side of the cross section and whose radius is based on the distance from the center to the neutral point (Go) of the cross section of the weakened part (Cs), and the neutral point (Go) is the contact point. It is preferable that the direction of the external force is determined based on the tangential direction of the virtual circle, and furthermore, the direction of the external force is determined based on at least the angle (θ4) formed by the mounting portion (15) and the connecting portion (18).

It is desirable that the angle (θ4) formed between the mounting portion (15) and the connecting portion (18) is 90 degrees or more. Furthermore, the cross-sectional center line of the weak part (19) is curved, and when the center of curvature side of the weak part (19) is defined as the inside, and the side opposite to the inside with the weak part (19) in between is defined as the outside, The inside of the fragile portion (19) is desirably recessed toward the outside compared to the portion of the handle portion (16) other than the fragile portion (19).

Incidentally, the above reference numerals in parentheses are an example showing the correspondence with the specific configurations described in the embodiments described later, and the present disclosure is not limited to the specific structures shown in the above parentheses. .

FIG. 1 is a diagram showing a vehicle seat according to a first embodiment. FIG. 1 is a diagram showing a slide device according to a first embodiment. It is a diagram showing the structure of a slide device according to a first embodiment. It is a figure showing the release handle concerning a 1st embodiment. It is a figure showing the weak part of the release handle concerning a 1st embodiment. It is a figure showing the shape of the weak part concerning a 1st embodiment.

The following "Embodiments of the Invention" represents an example of an embodiment that falls within 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 and structures shown in the embodiments below.

This embodiment is an example in which a slide device according to the present disclosure is applied to a seat (hereinafter referred to as a vehicle seat) mounted on a vehicle such as a vehicle. Arrows, diagonal lines, etc. indicating directions attached to each figure are provided to make it easier to understand the relationship between the figures and the shapes of members or parts.

Therefore, the slide device is not limited to the directions shown in each figure. The directions shown in each figure are the directions when the vehicle seat according to the present embodiment is assembled into a vehicle. Diagrams marked with diagonal lines do not necessarily represent cross-sectional views.

At least one member or portion is provided with at least a reference numeral, unless otherwise specified such as "one". That is, if there is no indication such as "one", two or more members may be provided. The slide devices and release handles shown in this disclosure include components such as at least the numbered and described members or portions.

(First embodiment)
<1. Overview of vehicle seats>
In this embodiment, a slide device 10 according to the present disclosure is applied to a vehicle seat 1 shown in FIG. The vehicle seat 1 includes at least a seat body 2, a slide device 10, and the like. The seat body 2 includes a seat cushion 3, a seat back 5, and the like.

The seat cushion 3 is a part for supporting the buttocks of a seated person. The seat back 5 is a part for supporting the back of a seated person. The slide device 10 is a device for slidably supporting the seat body 2.

<2. Slide device>
<2.1 Basic configuration>
The seat body 2 is supported by two slide devices 10. As shown in FIG. 2, the first slide device 10 of the two slide devices 10 is arranged on one end side in the seat width direction. The second slide device 10 of the two slide devices 10 is arranged on the other end side in the seat width direction.

The first slide device 10 and the second slide device 10 have a substantially symmetrical configuration. As shown in FIG. 3, each slide device 10 includes at least a fixed rail 11, a movable rail 12, a locking mechanism 13, a release handle 14, and the like.

Each fixed rail 11 is a metal rail member that is directly or indirectly fixed to a vehicle. Each movable rail 12 is a member to which the seat body 2 is fixed. These movable rails 12 are slidable relative to each fixed rail 11.

Each lock mechanism 13 is a mechanism for switching between a locked state in which sliding of the movable rail 12 is restricted and an unlocked state in which the restriction is released. Each release handle 14 is an operating lever for unlocking the lock mechanism 13.

Note that each lock mechanism 13 is in a locked state when no operating force is applied to the release handle 14 (the state shown in FIG. 3). Each locking mechanism 13 enters the unlocked state when the operating force Hf in the direction of the arrow acts on the release handle 14.

<2.2 Release handle>
In this embodiment, as shown in FIG. 2, the release handle 14 of the first slide device 10 and the release handle 14 of the second slide device 10 are integrated into one release handle. . Hereinafter, this one release handle will be referred to as release handle 14.

Therefore, the release handle 14 has a symmetrical structure with respect to the midpoint between the first slide device 10 and the second slide device 10. The following explanation is mainly about the portion of the release handle 14 on the first slide device 10 side.

<Configuration of release handle>
As shown in FIG. 4, the release handle 14 includes at least a mounting portion 15, a handle portion 16, a fragile portion 19, and the like. As shown in FIG. 3, the attachment portion 15 is a portion that can be attached to the slide device 10, and is a portion that is substantially parallel to the longitudinal direction of the slide device 10 when attached.

As shown in FIG. 4, the handle portion 16 has at least a grip portion 17, a connecting portion 18, etc., and is a portion capable of receiving an operating force Hf. The operating force Hf is transmitted to the mounting section 15 via the handle section 16.

The grip portion 17 is a portion that extends in a direction intersecting (in this embodiment, approximately perpendicular to) the longitudinal direction of the mounting portion 15 . Note that the grip portion 17 has a round pipe shape. The connecting portion 18 is located between the fragile portion 19 and the mounting portion 15, and is a portion that connects the fragile portion 19 and the mounting portion 15.

The connecting portion 18 extends in a direction intersecting the longitudinal direction of the mounting portion 15 (in the present embodiment, the sliding direction) and the extending direction of the gripping portion 17 (in the present embodiment, the left-right direction). Specifically, as shown in FIG. 3, the connecting portion 18 is inclined with respect to the horizontal plane so that the weakened portion 19 is located above the mounting portion 15.

The fragile portion 19 is a portion having lower rigidity than the handle portion 16 or the mounting portion 15, as shown in FIG. The fragile portion 19 is provided on the mounting portion 15 side of the handle portion 16. Specifically, the fragile portion 19 according to the present embodiment is provided on the end side in the extending direction of the grip portion 17 (in FIG. 4, on the right end side of the grip portion 17).

<Summary of vulnerable parts>
The cross-sectional center line L1 of the fragile portion 19 is curved, as shown in FIG. The inside of the weakened portion 19 is recessed outward compared to the portions of the handle portion 16 other than the weakened portion 19 .

Note that the inside of the weakened portion 19 refers to the side of the center of curvature O1 of the weakened portion 19 with respect to the cross-sectional center line L1. The outside of the fragile portion 19 refers to the side opposite to the inside with the fragile portion 19 in between. The cross-sectional center line L1 of the weakened portion 19 is an imaginary line passing through the centroids of the weakened portion cross sections Cs1 to Cs4, etc.

Weak section cross sections Cs1 to Cs4, etc. (hereinafter collectively referred to as weak section section Cs) are virtual cross sections of the fragile section 19 that intersect with the longitudinal direction of the mounting section 15 and the longitudinal direction of the gripping section 17. A cross section parallel to a plane.

In other words, the weakened portion cross section Cs is a cross section in an arbitrary virtual plane that includes the center of curvature O1 of the weakened portion 19. Then, an imaginary line connecting the centroids of arbitrary (innumerable) weak section cross sections Cs becomes the cross-sectional center line L1. In other words, the cross-sectional center line L1 is a curve that is orthogonal to any (innumerable) weak section cross-sections Cs.

In addition, if the fragile part 19 has a structure that satisfies the following requirements regarding the section modulus (detailed description of the fragile part), it may be (a) a curved shape with a constant curvature, or (b) a curved shape with a varying curvature. , (c) a shape with one center of curvature, and (d) a shape with multiple centers of curvature, or a combination of any of (a) to (d). You can leave it there.

<Details of vulnerable parts>
In the weakened portion cross section Cs, as shown in FIG. 6, the first section modulus Z1 around the first neutral axis Na1 is larger than the second section modulus Z2 around the second neutral axis Na2. The angle θ1 between the first neutral axis Na1 and the operating force Hf acting on the handle portion 16 is different from the angle θ2 between the second neutral axis Na2 and the operating force Hf.

<First neutral axis>
The first neutral axis Na1 is a neutral axis orthogonal to a predetermined tangential direction. As shown in FIG. 3, the tangential direction is determined based on the tangential direction of the imaginary circle So having the neutral point Go of the cross section Cs of the weakened portion as a contact point.

The virtual circle So is a virtual circle whose center is on the distal end side of the mounting portion 15 and whose radius is a length based on the distance from the center to the neutral point Go of the fragile portion cross section Cs. In addition, in this embodiment, the above-mentioned tangential direction is a direction parallel to the operating force Hf.

That is, in the present embodiment, the first neutral axis Na1 is selected such that "the operating force Hf acts in a direction parallel to the tangential direction at the neutral point Go." Therefore, in this embodiment, the angle θ1 between the first neutral axis Na1 and the operating force Hf is 90 degrees.

<Second neutral axis>
As shown in FIG. 6, the second neutral axis Na2 is a neutral axis that is perpendicular to the direction of the predetermined external force Ef. The direction of the external force Ef according to the present embodiment is determined based on at least the angle θ4 (see FIG. 3) formed between the mounting portion 15 and the connecting portion 18.

That is, the external force Ef according to this embodiment is a force other than the operating force Hf. Specifically, the external force Ef is, for example, a force that acts on the handle portion 16 at the time of a vehicle collision. Therefore, the direction of the external force Ef, that is, the second neutral axis Na2, differs depending on the vehicle in which the slide device 10 is mounted.

However, after carrying out numerous tests and studies, the inventor discovered that the majority of the causes of the external force Ef are that the legs of the seated person collide with the grip portion 17 during a vehicle collision. In other words, the force that is the source of the external force Ef that acts on the handle portion 16 is a force that has a large horizontal component.

Therefore, the angle θ5 (see FIG. 3) formed between the external force Ef acting on the handle portion 16 and the longitudinal direction of the mounting portion 15 is influenced by the angle θ4 (see FIG. 3) formed between the mounting portion 15 and the connecting portion 18. receive it strongly. Specifically, as the angle θ4 becomes larger, the angle θ5 tends to become smaller, and as the angle θ4 becomes smaller, the angle θ5 tends to become larger.

Therefore, in the present embodiment, the direction of the external force Ef, that is, the second neutral axis Na2, is determined based on at least the angle θ4 formed between the mounting portion 15 and the connecting portion 18. Further, it is desirable that the second neutral axis Na2 and the direction of the external force Ef are perpendicular to each other.

Note that the angle θ4 is preferably 90 degrees or more. The angle θ2 is preferably larger than the angle θ1, and the difference between the angle θ1 and the angle θ2 is preferably 20° or more and 90° or less. It is desirable that the first section modulus Z1 is larger than the second section modulus Z2 over the entire fragile portion 19 (concave portion).

Note that the above angles θ1 to θ5 are angles in the direction from the rear (movable rail 12 side) to the front (grip part 17 side) from the centroid (neutral point) Go of the cross section Cs of the fragile part (see FIGS. 3 and 3). (See Figure 6). Incidentally, FIG. 6 shows a cross section Cs of the weakened part that intersects the longitudinal direction of the mounting part 15 and the longitudinal direction of the grip part 17 at about 45 degrees.

<3. Features of the slide device (particularly the release handle) according to the present embodiment A fragile portion 19 having a lower rigidity than the handle portion 16 or the mounting portion 15 is provided on the side of the mounting portion 15 of the handle portion 16 .

As a result, in the release handle 14 according to the present embodiment, when a large external force acts on the handle portion 16, the fragile portion 19 deforms more preferentially than other parts, so that the energy input to the release handle 14 is is absorbed by the weakened portion 19.

This reduces the energy input to the slide device 10. Therefore, since damage to the slide device 10 is suppressed, unintentional release of the locked state can be suppressed.

The first section modulus Z1 is larger than the second section modulus Z2, and the angle between the first neutral axis Na1 and the operating force Hf is different from the angle between the second neutral axis Na2 and the operating force Hf.

In the present embodiment, the operating force Hf acts in a direction substantially perpendicular to the first neutral axis Na1, and when a large external force Ef, such as at the time of a collision, acts on the handle portion 16, the operating force Hf acts in a direction substantially perpendicular to the first neutral axis Na1. The configuration is such that the external force Ef acts in a perpendicular direction.

In other words, the fragile portion 19 of the release handle 14 according to the present embodiment has a first neutral axis Na1 selected in a direction substantially orthogonal to the operating force Hf, and a second neutral axis Na1 selected in a direction substantially orthogonal to the external force Ef. It is based on the technical idea (design method) of "selecting the vertical axis Na2, and then determining the shape of the weakened section cross section Cs so that the first section modulus Z1 is larger than the second section modulus Z2."

This prevents the release handle 14 (fragile portion 19) from deforming during normal use, and ensures that the fragile portion 19 deforms when a large external force is applied to the handle portion 16, such as during a collision. It is possible.

(Other embodiments)
In the embodiments described above, the release handle 14 had a symmetrical configuration. However, the present disclosure is not limited thereto. That is, the disclosure may include, for example, the release handle 14 that does not include the mounting portion 15 and the connecting portion 18 on one side in the seat width direction.

The positions of the first neutral axis Na1 and the second neutral axis Na2 and the specific shape of the weakened portion cross section Cs according to the above-described embodiment are merely examples, and the present disclosure is not limited thereto.

That is, the disclosure provides a configuration in which, for example, an operating force Hf acts in a direction substantially perpendicular to the first neutral axis Na1, and a large external force Ef acts in a direction substantially perpendicular to the second neutral axis Na2, Any configuration is sufficient as long as the first section modulus Z1 is larger than the second section modulus Z2.

The fragile portion 19 according to the above-described embodiment was provided at the end of the grip portion 17 in the extending direction. However, the present disclosure is not limited thereto. That is, since the fragile portion 19 only needs to be provided on the mounting portion 15 side of the handle portion 16, the disclosure may be a configuration in which the connecting portion 18 is provided with the fragile portion 19.

The handle portion 16 according to the above-described embodiment was configured to include a grip portion 17 and a connecting portion 18. However, the present disclosure is not limited thereto. That is, the disclosure may include, for example, a configuration in which the connecting portion 18 is abolished.

In the embodiments described above, the vehicle seat according to the present disclosure is applied to a vehicle. However, the application of the invention disclosed herein is not limited thereto. That is, the disclosure is applicable to, for example, seats used in vehicles such as railway vehicles, ships, and aircraft, and stationary seats used in theaters, homes, and the like.

Furthermore, the present disclosure is not limited to the above-described embodiments as long as it conforms to the spirit of the disclosure described in the above-described embodiments. Therefore, in a configuration in which at least two of the above-mentioned embodiments are combined, or in the above-mentioned embodiment, any of the illustrated structural features or the structural features described with reference numerals are abolished. It may be a configuration in which

1... Vehicle seat 3... Seat cushion 5... Seat back 10... Slide device 11... Fixed rail 12... Movable rail 13... Lock mechanism 14... Release handle 15... Mounting part 16... Handle part 17... Gripping part 18... Connection part 19 … Weak part

Claims (3)

In a release handle that is applied to a slide device that slidably supports a vehicle seat and is operated to release a locked state in which the slide is restricted,
an attachment part that can be attached to the slide device and that is substantially parallel to the longitudinal direction of the slide device when attached;
a handle portion that receives an operating force, has a grip portion that extends in a direction intersecting the longitudinal direction of the mounting portion, and is capable of transmitting the operating force to the mounting portion;
A fragile part provided on the mounting part side of the handle part and having a lower rigidity than the handle part or the mounting part ,
A cross section of the fragile portion, where a cross section parallel to an imaginary plane intersecting the longitudinal direction of the mounting portion and the longitudinal direction of the gripping portion is defined as a cross section of the fragile portion, and a cross section around the first neutral axis in the cross section of the fragile portion. The coefficient is a first section modulus, the section modulus around the second neutral axis in the cross section of the weakened part is a second section modulus ,
An imaginary circle whose center is the distal end side of the attachment part and whose radius is based on the distance from the center to the neutral point of the cross section of the fragile part, and the direction of the tangent to the imaginary circle with the neutral point as the contact point. When it is tangential direction,
the first section modulus is greater than the second section modulus;
A connecting portion is provided between the fragile portion and the mounting portion, and extends in a direction intersecting the longitudinal direction of the mounting portion and the extending direction of the gripping portion, and connects the fragile portion and the mounting portion. Ori,
The first neutral axis is a neutral axis perpendicular to the tangential direction,
The angle between the tangential direction and the second neutral axis is larger than the angle between the tangential direction and the first neutral axis,
The angle formed by the second neutral axis and the first neutral axis is 20° or more and 90° or less,
Furthermore, in the release handle, the angle formed by the attachment part and the connection part is 90 degrees or more . The cross-sectional center line of the weakened part is curved, and the center of curvature of the weakened part is defined as the inside, and the opposite side of the weakened part to the inside is defined as the outside,
The release handle according to claim 1, wherein an inner side of the weakened portion is recessed outward compared to a portion of the handle portion other than the weakened portion. a second mounting part that can be mounted on a second slide device, the second mounting part being substantially parallel to the longitudinal direction of the second slide device when mounted;
The mounting portion is provided on one end side in the extending direction of the handle portion, and the second mounting portion is provided on the other end side in the extending direction of the handle portion,
The operating force can be transmitted from the handle part to the second mounting part,
3. Further, a second fragile part having a lower rigidity than the handle part or the second mounting part is provided on the second mounting part side of the handle part. release handle.

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