JP2013078988A - Operation lever of vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an operation lever of a vehicle seat which can make excellent operability appear even in a narrow space.SOLUTION: The operation lever 1 of the vehicle seat mounted to the side of a seat cushion 91 serving as a sitting part of an occupant includes: a shaft part 10 mounted to a rotary shaft 92 one side of which is mounted to the seat cushion 91; and a grip part 20 which is mounted to the other side of the shaft part 10 and which becomes a holding part when turning the operation lever on the rotary shaft 92. The maximum length of the grip part 20 of the operation lever 1 for the vehicle seat 90 in the height direction is larger than that of the shaft part 10 in the height direction.

Description

  The present invention relates to an operation lever for a vehicle seat that is operated when part or all of the vehicle seat is moved.

  Patent Document 1 below describes an operation lever provided on the side of a seat cushion (seat portion) of a vehicle seat. By turning this operation lever, the angle of the seat back (backrest portion) of the vehicle seat and the seat cushion can be adjusted.

JP 2011-63049 A

  However, the operation lever has the following problems. The operation lever is often provided on the outer side of the vehicle seat. An inner wall surface (such as an inner surface of a door) of the vehicle body is close to the outer side of the seat cushion. Therefore, there is a problem that the space in the width direction of the portion where the operation lever is provided is narrow and the operation lever is difficult to operate.

  Specifically, as shown in FIG. 4, since the thickness of the grip portion 101 (the handle portion) of the conventional operation lever 100 is small, when the occupant operates the grip portion 101, the grip portion 101 is moved up and down. You will have to hold it like you pick it. In particular, when the operation lever 100 is pushed down, the operation lever 100 must be grasped so as to be pressed from above with a thumb. When the gripping portion 101 is gripped in this way, the shape of the hand is as if the vicinity of the joint at the base of the finger (the metacarpophalangeal joint) is raised (swelled outward in the width direction). There is a problem that it is difficult. In order to ensure good operability of the operation lever 100, the space in the width direction on the side of the seat cushion where the operation lever 100 is provided must be increased (a space of dimension W2 or more shown in FIG. 4B). Therefore, it becomes a factor that hinders downsizing of the vehicle.

  In view of the above circumstances, an object of the present invention is to provide an operation lever for a vehicle seat that exhibits excellent operability even in a narrow space.

  In order to solve the above-described problems, the present invention provides a vehicle seat operating lever provided on a side of a seat cushion serving as a seating portion for an occupant, one side of which is attached to a rotating shaft provided on the seat cushion. And a grip portion provided on the other side of the shaft portion, which serves as a handle portion when the lever is rotated about the rotation shaft, and has a maximum length of the grip portion in the height direction. Is larger than the maximum length of the shaft portion in the height direction.

  According to the present invention, since the grip portion is long in the height direction, the operation lever is operated so that the grip portion is gripped by the entire operator (the seated person of the vehicle seat). Since the hand gripping the gripping part is in a state where the instep is stretched substantially straight, the operability is excellent even in a narrow space. From another viewpoint, it can be said that the space in the width direction on the side of the seat cushion for operating the operation lever can be reduced.

  Moreover, the lower surface of the said grip part should just form the four-finger engaging part which undulated in the cross-sectional wave shape with which at least any one of fingers other than a thumb are engaged.

  In this way, it is possible to fit a finger other than the thumb (at least one of them) to the lower surface of the gripping portion, so that the operability of the operation lever is improved. In particular, the operability of the operation of pulling up the operation lever is improved.

  In addition, a thumb engaging portion that is recessed downward may be formed on the upper front side of the grip portion.

  In this way, since the thumb can be fitted to the front upper portion of the grip portion, the operability of the operation lever is improved. In particular, the operability of the operation of depressing the operation lever is improved.

  Further, the thumb engaging portion is formed in a curved cross section, and the length between the apex of the curve of the thumb engaging portion and the apex of the foremost valley of the four finger engaging portion is 25 mm. It may be at least 35 mm.

  In addition, the length of the grip portion in the height direction and the length of the portion passing through the apex of the rearmost valley portion of the four-finger engagement portion may be 62 mm or more and 72 mm or less.

  According to the present invention, an operation lever for a vehicle seat that exhibits excellent operability even in a small space can be obtained. From another viewpoint, it can be said that the operation space (space in the width direction) of the operation lever can be made narrower than before.

It is a side view (figure which showed the state attached to the vehicle seat) of the operation lever of the vehicle seat concerning the embodiment of the present invention. FIG. 2A is an external view of an operation lever of a vehicle seat according to the present embodiment, FIG. 2A is a side view of the operation lever, FIG. 2B is a side view of a state in which the operation lever is gripped, FIG. c) is a front view showing a state where the operation lever is held. FIG. 3A is a diagram for explaining a preferable size of each part in the gripping portion, and FIG. 3B is a diagram illustrating the location of the hand used for deriving the preferable size of the gripping portion. FIG. FIG. 4A is an external view of a conventional operation lever for a vehicle seat, FIG. 4A is a side view of the operation lever, and FIG. 4B is a front view of a state in which the operation lever is gripped.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, the width direction simply refers to the X-axis direction shown in the figure and refers to the width direction of the vehicle seat 90, and the front-rear direction simply refers to the Y-axis direction illustrated and the front-rear direction of the vehicle seat 90. The height direction (vertical direction) is simply the Z-axis direction shown and the height direction of the vehicle seat 90.

  An operation lever 1 for a vehicle seat according to an embodiment of the present invention (hereinafter also simply referred to as an operation lever 1) is provided on a side of a seat cushion 91 that serves as a seating portion for an occupant as shown in FIG. . Most of this type of operation lever 1 is provided on the outside in the width direction of the seat cushion 91 (outside in the width direction of the vehicle), but may be provided on the inside in the width direction (inside in the width direction of the vehicle). The vehicle seat 90 is provided with a reclining device that adjusts the angle of the seat back (back portion) and a lifter device that adjusts the height of the seat cushion 91 (sitting portion). 1 is applicable as an operation lever of these devices. Note that the operation lever 1 described in detail below may be applied to both the reclining device and the lifter device, or may be applied to either one (which can of course be applied to other devices). In addition, the reclining device and the lifter device operated by the operation lever 1 can be applied with a well-known configuration, and thus the description thereof is omitted.

  The operation lever 1 includes a shaft portion 10 attached to the rotating shaft 92 and a grip portion 20 formed integrally with the shaft portion 10. The shaft portion 10 has one side (rear side) end portion 11 attached to a rotating shaft 92 provided on the seat cushion 91. The rotating shaft 92 is one element that constitutes a reclining device, a lifter device, or the like provided on the vehicle seat 90. In the case of a reclining device, the seat back tilts or rises as the rotating shaft 92 rotates. In the case of the lifter device, the rotation of the rotary shaft 92 causes the height of the seat cushion 91 to move up and down. The shaft portion 10 of the operation lever 1 rotates around the axis of the rotation shaft 92. If the shaft portion 10 rotates in the direction in which it rises, the rotating shaft 92 tends to rotate to one side. When the shaft portion 10 is rotated in the downward direction, the rotation shaft 92 tries to rotate to the other side.

  The grip portion 20 is a portion that is provided at the other end (front side) end portion 12 of the shaft portion 10 and serves as a handle of the operation lever 1. In the present embodiment, the other end portion 12 of the shaft portion 10 is bent so as to gradually move upward toward the tip, and the grip portion 20 is formed so as to be continuously connected to the tip. The grip portion 20 is formed so that the maximum length in the height direction is larger than the maximum length in the height direction of the shaft portion 10. That is, the thickness of the grip part 20 is larger than the thickness of the shaft part 10. Details of the size of the grip 20 will be described later.

  A person who intends to operate the operation lever 1 normally holds the grip 20 as shown in FIGS. 2 (b) and 2 (c). The lower surface 22 of the grip 20 is brought into contact (engaged) with at least one tip (palm side) of four fingers excluding the thumb. Specifically, the part from the tip of the finger to the vicinity of the distal interphalangeal joint (joint on the most distal side of the finger) and the proximal interphalangeal joint (second joint from the tip of the finger) contacts the lower surface 22 Let The upper surface 23 of the grip 20 is brought into contact with the thumb and its root portion (palm side). Thus, since the grip 20 is longer than the conventional operation lever 100 in the height direction, the grip 20 is gripped by the tip of the finger, the thumb, and its root portion so as to be sandwiched vertically. Therefore, the back of the hand is stretched substantially straight, and most of the palm (the region from the vicinity of the proximal interphalangeal joint to the base of the thumb) is brought close to or in contact with the outer side surface 21 of the grasping portion 20. As described above, in this embodiment, a person who intends to operate the operation lever 1 inevitably grasps the grip portion 20 so as to wrap the entire hand with the central portion of the palm extending substantially straight.

  As described above, when the grip portion 20 of the operation lever 1 is gripped, the back of the hand is in a straight state. That is, unlike the case where the conventional operation lever 100 is grasped (picked), the vicinity of the joint at the base of the finger (metacarpophalangeal joint) does not rise and swell outward. Therefore, the operation lever 1 according to the present embodiment is excellent in operability even in a space narrow in the width direction on the side of the seat cushion 91. In other words, if the operation lever 1 according to the present embodiment is employed, the space in the width direction on the side of the seat cushion 91 for operating the operation lever 1 can be reduced. As can be seen from a comparison between FIG. 2 (c) and FIG. 4 (b), the space W1 required in the width direction when the operation lever 1 of this embodiment is used is when the conventional operation lever 100 is used. Obviously, it is smaller than the space W2 in the width direction necessary for the above.

  In particular, when the conventional operation lever 100 is applied to a device that requires an operation of depressing the operation lever 1 (for example, a lifter device; see Japanese Patent Application Laid-Open No. 2011-63049 (paragraph 0016)), when the operation lever 1 is depressed. It must be gripped so that it is pressed with the thumb from the top, and the shape of the hand that inevitably swells near the joint at the base of the finger (the metacarpophalangeal joint) (the shape of the hand as shown in FIG. 4B) Therefore, the operability was not good. However, with the operation lever 1 according to the present embodiment, the back of the hand is straightened even when pushed down, so that the operability is not significantly deteriorated even in a narrow space.

  Further, as described above, the lower surface 22 of the grip 20 is a portion where at least one of fingers other than the thumb contacts. In consideration of this, the lower surface 22 is formed with a four-finger engagement portion 221 that undulates in a cross-sectional shape. By forming such a four-finger engagement portion 221, at least one of fingers other than the thumb can be fitted to the lower surface 22 of the grip portion 20, and the operability of the operation lever 1 is further improved. In particular, the operability of the operation of pulling up the operation lever 1 is improved.

  The four-finger engagement portion 221 in the present embodiment has a shape in which three valleys are arranged in the front-rear direction. The frontmost valley (hereinafter referred to as front valley 221a), the central valley (hereinafter referred to as central valley 221b), and the rearmost valley (hereinafter referred to as rear valley 221c) are arranged. It is a shape. The front trough part 221a is positioned so as to overlap with a thumb engaging part 231 described later in the height direction. The rear trough part 221c is formed in the longest part of the grip part 20 in the height direction. If the operator naturally grasps the grip 20, the index finger comes into contact with the front valley 221 a, the middle finger comes into contact with the central valley 221 b, and the ring finger and little finger come into contact with the rear valley 221 c. The number and size of the valleys can be changed as appropriate. For example, it is good also as a structure by which four trough parts were formed according to the number of fingers other than the thumb.

  Further, as described above, the upper surface 23 of the grip portion 20 is a portion where the thumb and its root portion come into contact. Specifically, the thumb is in contact with the front side of the upper surface 23, and the root portion of the thumb is in contact with the rear side of the upper surface 23. Based on this, a thumb engaging portion 231 that is recessed downward in a cross-sectional (side view) curved shape is formed on the upper front side of the grip portion 20. By forming such a thumb engaging portion 231, the thumb can be fitted to the front upper portion of the grip portion 20, and the operability of the operation lever 1 is further improved. In particular, the operability of the operation of depressing the operation lever 1 is improved.

  A stopper portion 241 extending in a planar shape along the inner side surface 24 of the grip portion 20 is formed below the lower surface 22 (four-finger engagement portion 221) of the grip portion 20. By providing such a stopper portion 241, the tip of at least one of the four fingers except the thumb that is hooked on the lower surface 22 of the grip portion 20 when the operator grips the grip portion 20 comes into contact with the stopper portion 241. None of the four fingers protrudes from the inner surface 24 of the grip portion 20. That is, the stopper portion 241 provided on the grip portion 20 prevents the four fingers from hitting members other than the lever and causing injury when the lever is operated.

  From the viewpoint of realizing excellent operability, the grip portion 20 having such a configuration is preferably formed in the following dimensions. First, it is a portion where the thumb engaging portion 231 is formed in the gripping portion 20, and the vertex of the curve of the thumb engaging portion 231 (the apex of R) and the apex of the valley of the front valley portion 221 a (the apex of R). The length between them, in other words, the shortest distance between the thumb engaging portion 231 and the front valley portion 221a (a portion shown in FIG. 3A) is preferably 25 mm or more and 35 mm or less. In other words, the distance between the portion in contact with the thumb and the portion in contact with the index finger may be 25 mm or more and 35 mm or less. Secondly, the length of the portion passing through the apex of the valley (the apex of R) of the rear valley portion 221c of the four-finger engagement portion 221 in the height direction (the e portion shown in FIG. 3A) is 62 mm. It is desirable that it is 72 mm or less. That is, the distance between the portion where the ring finger or the little finger contacts and the portion where the portion closer to the wrist of the palm contacts may be 62 mm or more and 72 mm or less.

  The above dimensions were derived based on the average hand size of Japanese women. The size of a Japanese woman's hand (length from the tip of the hand (middle finger) to the boundary with the wrist; “hand length L” shown in FIG. 3B) is 168 mm at 50% ile (percentile). . The length of the actual grip portion of a plurality of evaluators (Japanese women) having a hand of this size (the length from the distal interphalangeal joint of the ring finger to the base of the thumb; shown in FIG. 3B) When “grip length l”) was measured, the average was about 60 mm. Based on this, when the evaluator made a sensory evaluation with various changes in the length of the grip portion 20, the length between the apex of the curve of the thumb engaging portion 231 and the apex of the valley of the front valley portion 221a (a portion). It was confirmed that the grip portion 20 can be comfortably gripped when the height is 25 mm or more and 35 mm or less. Further, in the sensory evaluation of a Japanese male having an average size hand (50% ile), it was confirmed that the grip portion 20 could be comfortably gripped if the dimensions were concerned. If the length (e part) of the portion passing through the apex of the valley of the rear valley part 221c of the four-finger engagement part 221 in the height direction is 62 mm or more and 72 mm or less, It was confirmed that 20 can be held.

  In the same manner, suitable dimensions of each part in the grip part 20 other than the a part and the e part were derived. As a result, the length of the portion b (the length of the portion passing through the boundary between the front valley portion 221a and the central valley portion 221b (the peak of the mountain) in the height direction) may be 50 mm or more and 60 mm or less. The length (the length of the portion passing the apex of the valley of the central valley portion 221b in the height direction) may be 53 mm or more and 63 mm or less, and the length of the d portion (the central valley portion 221b and the rear side in the height direction) It was confirmed that the length of the portion passing through the boundary (peak of the mountain) of the valley 221c may be 60 mm or more and 70 mm or less.

  Further, in the case of the grip portion 20 having a size within such a range, the space in the width direction on the side of the seat cushion 91 necessary for operating the operation lever 1 (the dimension W1 shown in FIG. 2C) is , 40 mm or less was confirmed. Incidentally, in the case of the control lever 100 having the conventional structure shown in FIG. 4 (the control lever described in Patent Document 1), the space in the width direction on the side of the seat cushion necessary for operating the control lever 100 (FIG. 4B). The dimension W1) shown in FIG.

  As mentioned above, although embodiment of this invention was described in detail, this invention is not limited to the said embodiment at all, A various change is possible in the range which does not deviate from the summary of this invention.

DESCRIPTION OF SYMBOLS 1 Vehicle seat control lever 10 Shaft part 20 Grasping part 21 Outer side surface 22 Lower surface 221 Four finger engaging part 23 Upper surface 231 Thumb engaging part

Claims (5)

An operation lever for a vehicle seat provided on a side of a seat cushion serving as a seating portion of an occupant,
A shaft portion attached to a rotating shaft provided on one side of the seat cushion;
A grip portion provided on the other side of the shaft portion and serving as a handle portion when the lever is rotated around the rotation shaft;
An operation lever for a vehicle seat, wherein a maximum length of the grip portion in the height direction is larger than a maximum length of the shaft portion in the height direction.   The vehicular seat according to claim 1, wherein a four-finger engagement portion undulated in a cross-sectional wave shape is formed on a lower surface of the grip portion so that at least one of fingers other than the thumb is engaged. Control lever.   The operation lever for the vehicle seat according to claim 1 or 2, wherein a thumb engaging portion that is depressed downward is formed on an upper front side of the grip portion. The thumb engaging portion is formed in a curved cross section,
4. The vehicle according to claim 3, wherein a length between a vertex of the curve of the thumb engaging portion and a vertex of the foremost valley portion of the four-finger engaging portion is 25 mm or more and 35 mm or less. Sheet operation lever.   The length of the grip portion in the height direction and the length of the portion passing through the apex of the rearmost valley portion of the four-finger engagement portion is 62 mm or more and 72 mm or less. Or the operation lever of the vehicle seat of Claim 4.

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