JP6175692B2 - Automotive door check link device - Google Patents

Description

  The present invention relates to an automobile door check link device for holding an automobile door in an open state.

  For example, an automobile door check link device described in Patent Document 1 is pivotally supported on the vehicle body side, and is provided on the door side with an arm formed with a plurality of concave and convex portions in the longitudinal direction of the surface. By providing a shoe that is urged to the surface of the arm by an elastic member and that can slide on the surface of the arm as the door opens and closes, the friction force generated between the uneven portion of the arm and the shoe causes the door to It is designed to be held in multiple stages in a half-open state.

JP 2006-183269 A

  However, in such a door check link device for automobiles, since a plurality of concave and convex portions are formed in the longitudinal direction of the arm, when the shoe is recessed into the concave portion or gets over the convex portion with opening and closing of the door, Since the frictional force, that is, the door opening / closing operation force changes abruptly, it is difficult to say that the feeling of operation when the door is opened / closed is good.

  In view of the above problems, an object of the present invention is to provide a check link device for an automobile that can perform a door opening / closing operation in a favorable manner and can maintain the opening position of the door in multiple stages.

(1) a case that is fixed to either the door or the vehicle body, a base end that is swingably supported by either the door or the vehicle body, and a free end that is an arm that penetrates the case; A holding member provided in the case and slidably moving along the longitudinal direction of the outer surface of the arm by opening and closing the door; and provided in the case, the holding member facing the outer surface of the arm An automotive door check link device comprising: an urging means that urges the arm; a plurality of small groove portions into which the holding member can be inserted into an outer surface in a longitudinal direction of the arm; and a large groove portion deeper than the small groove portion. The large groove portions are provided on the free end side and the central side of the arm, respectively, and the plurality of small groove portions are provided between the base end of the arm and the large groove portion on the central side, and the large groove portion on the central side. The large groove on the free end side and Respectively arranged between, and opening direction of the dynamic frictional force <shall have a resistance surface for the closing direction of the dynamic friction force, the large groove portion of the center side, the dynamic friction force of the opening direction <and closing direction of the dynamic friction force It is assumed that the large groove portion on the free end side has a resistance surface with dynamic frictional force in the opening direction> dynamic frictional force in the closing direction .

According to the above-described configuration, the operating force during the opening operation of the door is relatively small by setting the resistance surface of the small groove portion and the large groove portion on the center side to the dynamic friction force in the opening direction < the dynamic friction force in the closing direction. The operator can perform the opening operation with relatively light power. In this case, since the static friction force is also small, the initial operation in the opening operation can be performed with a light force. On the other hand, the operation force at the time of closing the door can be made relatively large. For example, the door can be closed by an unexpected external force (wind etc.) similar to the operation force of the opening operation described above. Can be difficult.

Also, by setting the resistance surface of the large groove portion on the free end side so that the dynamic friction force in the opening direction > the dynamic friction force in the closing direction, the operation force at the time of closing the door can be made relatively small. The person can perform the closing operation with relatively light power. In this case, since the static friction force is also small, the initial operation in the closing operation can be performed with a light force.
Also, for example, when a fully open stopper is provided on the free end side of the arm so that the case moved along the arm can collide, when the case collides with the fully open stopper portion, the impact is suppressed by the dynamic friction force in the opening direction. be able to.

  Further, by setting the groove to such a depth that the door opening / closing operation force (operation force necessary for opening / closing operation) cannot be changed, the operator can feel a smooth operation feeling.

In addition, by allowing the holding member to be held by a static friction force generated between the plurality of small groove portions and the holding member, the half-open state of the door can be held in multiple stages.
That is, the door opening operation is particularly good, and the door opening position can be held in multiple stages.

  (2) In the above (1), the plurality of small groove portions are provided on the upper and lower or left and right outer surfaces of the arm, and the small groove portions on the outer surface facing each other are shifted in the longitudinal direction of the arm. The upper and lower or left and right pair of holding members move in sliding contact with the upper and lower or left and right outer surfaces of the arm.

  According to the above-described configuration, since the small groove portion can be arranged densely in the longitudinal direction as a whole arm, the door can be held at a fine position by the holding member, and the degree of freedom of the door holding position is improved. Can be achieved.

  (3) In the above (1) or (2), the resistance surface of the small groove portion is a concave circular arc surface, a first circular arc surface is provided on the proximal end side in the small groove portion, and the free end side is provided on the free end side. The second arc surface having a concave arc shape larger than the first arc surface is provided.

  (4) In the above (1) or (2), the resistance surface of the small groove portion is an inclined surface having a predetermined inclination angle, a first inclined surface is provided on the base end side of the small groove portion, and the free end A second inclined surface having an inclination angle smaller than that of the first inclined surface is provided on the side.

  According to the configuration of the above (3) or (4), the frictional force in the closing direction can be increased while suppressing the frictional force in the opening direction of the door by making the resistance surface an arc surface or an inclined surface. . Thereby, for example, it is possible to perform an operator's door opening operation with a light force, and it is possible to prevent a door closing operation due to an unexpected external force (wind or the like).

  ADVANTAGE OF THE INVENTION According to this invention, the opening / closing operation of a door can be made favorable and the check link apparatus for motor vehicles which can hold | maintain the open position of a door in multiple steps can be provided.

It is a perspective view of the important section of a car in the state where the check link device concerning the present invention was attached. It is a top view of a check link device similarly. It is a side view (partial sectional view) of the check link device. It is an enlarged side view (substantially center part) of the arm in a check link device similarly. It is the enlarged side view (substantially front-end | tip part) of the arm in a check link apparatus similarly. It is a figure for showing opening-and-closing operation power accompanying opening of a door which provided a check link device similarly.

Hereinafter, the present invention will be described in detail through embodiments of the invention with reference to FIGS. 1 to 6, but the following embodiments do not limit the invention according to the claims.
In the following description, the lower side in FIGS. 2 and 3 and the left side in FIGS. 4 and 5 are the front or the base end side (front side) of the arm, and the upper side in FIGS. 2 and 3 and in FIGS. The right side is the rear side or the front end side (free end side, rear side) of the arm, and the front side of FIG. 2 and FIG. 3 and the upper side of FIG. 4 and FIG. The lower side in FIG. 4 and FIG. 5 is the lower side or the lower side.

(Check link device)
As shown in FIG. 1, the door check device 1 includes a door D that is rotatably fixed to a body (vehicle body) B of an automobile by a pair of upper and lower hinges H having vertical hinge shafts in a half-open position in multiple stages. It is held, or the fully open position is restricted or held at that position.
As shown in FIGS. 1 and 2, the door check device 1 includes a check structure 4 mounted in the door D, and a pivot shaft 3 that faces a fixed bracket 2 whose front end is fixed to the body B in the vertical direction. Is provided with a check link (arm) 5 that is supported so as to be swingable in the left-right direction, and the rear end portion side is inserted into the door D.

(Check structure)
When the door D moves in the opening direction from the closed position, the check structure 4 moves to the base end side (hereinafter simply referred to as the base end) of the check link 5 which is a position indicated by a solid line in FIG. The rear surface of the case 8 of the check structure 4 contacts the fully open stopper portion 55 provided at the front end portion of the check link 5. The fully open position of the door D is regulated by contact (see phantom line in FIG. 2).

  As shown in FIGS. 2 and 3, the check structure 4 is accommodated in a case 8 provided with a through hole 81 through which the check link 5 passes in the longitudinal direction, and in the case 8 so as to be movable up and down. Check the shoe (holding member) 9 that can be in contact with the upper surface (simply referred to as sliding contact), the shoe (holding member) 10 that can be in sliding contact with the lower surface of the check link 5, and the shoes 9, 10. It has elastic bodies 11 and 11 formed by a pair of upper and lower rubbers that urge each of the upper and lower surfaces of the link 5.

The shoes 9 and 10 have a steadying portion (not shown) for coming into contact with the left and right surfaces of the check link 5 to keep the check link 5 steady in the horizontal direction.
Further, the shoes 9 and 10 have holding portions 9a and 10a that can be inserted into small groove portions 56 and large groove portions 57 and 58, which will be described later (see FIG. 3). The tips of the holding portions 9 a and 10 a, that is, the surface that is in sliding contact with the check link 5 has a convex spherical shape so that it can be recessed into the small groove portion 56.

(Check link)
As shown in FIGS. 2 and 3, the check link 5 is formed by molding the entire surface of a metal core member 6 with a synthetic resin coating material 7.

(Core material)
As shown in FIGS. 2 and 3, the core member 6 has a shaft hole 61 into which the pivot 3 is inserted at the front end portion on the front side, and the width direction (left-right direction) of the core member 6 at the rear end portion. And a fully open stopper piece 62 bent in the thickness direction (vertical direction). The longitudinal direction of the core member 6 is formed to be slightly curved in plan view in accordance with the track of the case 8 that moves when the door D is opened and closed, and has a length that allows the door D to be opened. Moreover, the width | variety and thickness of the core material 6 become substantially the same width and the same thickness from the base end part to the front-end | tip part.

(Coating material)
As shown in FIGS. 2 and 3, the covering material 7 forms the outer shape of the check link 5 by molding the entire surface of the core material 6.
The covering material 7 is molded around the shaft hole 61 at the base end portion of the core material 6 to form a boss portion 51 pivotably attached to the fixed bracket 2 via the pivot shaft 3.
Further, by molding the fully open stopper piece 62 at the tip of the core member 6, the outer shape (width and thickness) becomes larger than the through hole 81 of the case 8, and the rear surface of the case 8 of the check structure 4 is A fully open stopper portion 55 that restricts the fully open position of the door D by abutting is formed.
Further, as a surface (hereinafter simply referred to as a sliding contact surface) on which the shoes 9 and 10 formed on the upper and lower surfaces which are the outer surfaces of the check link 5 are slidably contacted, the first sliding member is directed from the proximal end side toward the distal end side. The contact surface part 52, the slope part 53, and the 2nd sliding contact surface part 54 are formed in order.

(First sliding surface part)
As shown in FIG. 3, the first sliding contact surface portion 52 has a planar shape having a certain thickness t <b> 1 from the boss portion 51 of the check link 5 toward the tip portion.
The thickness t1 of the first sliding contact surface portion 52 is substantially the same as or slightly larger than the dimension t between the upper and lower shoes 9 and the shoes 10 provided in the check structure 4. Therefore, even when the shoes 9 and 10 are in sliding contact with the first sliding contact surface portion 52, the shoes 9, 10 are separated from the first sliding contact surface portion 52 (the shoe 9 is upward and the shoe 10 is downward). Therefore, the elastic force 11, that is, the urging force of the shoes 9 and 10 against the first sliding contact surface portion 52 is slight.
Therefore, the friction force generated between the first sliding contact surface portion 52 and the shoes 9 and 10 and the opening / closing operation force that is directly affected by the friction force (the operation force necessary for opening / closing the door) are relatively high. Therefore, the initial operation of the opening operation can be easily performed with light power (see steps (a) and (h) in FIG. 6).

(Slope part)
As shown in FIG. 3, the slope portion 53 has a slope whose thickness gradually increases from the first sliding contact surface portion 52 of the check link 5 toward the tip portion. Further, the slope portion 53 has the same thickness as that of the first sliding contact surface portion 52 on the base end portion side, and has the same thickness as that of the second sliding contact surface portion 54 on the distal end portion side. Thereby, the slope part 53 can connect smoothly the 1st sliding contact surface part 52 and the 2nd sliding contact surface part 54 from which thickness differs. Therefore, it is possible to eliminate a sense of incongruity during an operation caused by a sudden change in the frictional force, that is, the opening / closing operation force.

  The slope portion 53 is biased by the shoes 9 and 10, so that a force that moves the shoes 9 and 10 toward the base end side (a component force of the biasing force), that is, a force that moves the door D in the closing direction. Since it acts, the door closing property of the door D is improved in the section of the slope portion 53.

Further, when the check structure 4 (shoes 9, 10) moves from the base end side to the tip end side, the inclined surface portion 53 is gradually pushed in the direction in which the shoes 9, 10 are separated from each other, and the elastic body 11, Since the stress on 11 gradually increases, the elastic force of the elastic bodies 11, 11, in other words, the urging force of the shoes 9, 10 against the first sliding contact surface portion 52 also increases in accordance with the movement toward the tip end side. On the other hand, when moving from the distal end side to the proximal end side, the biasing force gradually decreases.
Accordingly, the frictional force and the opening / closing operation force generated between the slope portion 53 and the shoes 9, 10 gradually increase when moving from the base end side to the tip end side, and move from the base end side to the tip end side. In this case, the value gradually decreases (see steps (b) and (g) in FIG. 6).

(Second sliding surface part)
As shown in FIG. 3, the second slidable contact surface portion 54 extends from the inclined surface portion 53 of the check link 5 toward the tip portion, and has a planar shape having a thickness t <b> 2 greater than the thickness t <b> 1 of the first slidable contact surface portion 52. Yes.
Since the thickness t2 of the second sliding contact surface portion 54 is larger than the dimension t between the upper and lower shoes 9 and 10 (t2> t), the shoes 9 and 10 are in sliding contact with the second sliding contact surface portion 54. In this case, the shoes 9 and 10 are pushed in a direction away from each other with a constant force, and the stress on the elastic bodies 11 and 11 is also increased. The urging force with respect to one sliding contact surface portion 52 also becomes large.
Accordingly, the frictional force and the opening / closing operation force generated between the second sliding contact surface portion 54 and the shoes 9 and 10 are relatively large.

  Further, the direction in which the urging force of the shoes 9 and 10 acts on the second slidable contact surface portion 54 is perpendicular to the slidable contact surface, unlike the inclined surface portion 53, and therefore the urging force is efficiently applied to the slidable contact surface. Can be transmitted. Accordingly, the door D is more easily held on the second sliding contact surface portion 54 by the frictional force with respect to the shoes 9 and 10.

(Groove)
As shown in FIGS. 4 and 5, the second sliding contact surface portion 54 is provided with a plurality of small groove portions 56 continuously on both upper and lower surfaces along the longitudinal direction. Further, the first large groove portion 57 larger than the small groove portion 56 is formed on the upper and lower surfaces at the substantially center in the longitudinal direction of the second sliding contact surface portion 54, and the first large groove portion 57 is disposed on the upper and lower surfaces on the tip end side. Second large groove portions 58 having substantially the same dimensions and different inclination angles of the inclined surfaces described later are provided.
The small groove portion 56, the first large groove portion 57, and the second large groove portion 58 are arranged on the upper and lower surfaces of the second slidable contact surface portion 54 so as to be line symmetric.

(Small groove)
As described above, the small groove portion 56 has a groove shape extending in the width direction (left-right direction) having a substantially concave arc surface so that the tip portions of the holding portions 9a, 10a of the shoes 9, 10 are recessed, and the door The depth d is such that no change occurs in the opening / closing operation force of D. The small groove portion 56 is provided with a concave arcuate arc surface (resistance surface) a1 on the base end side, and a concave arcuate arc surface (resistance surface) a2 having a larger diameter than the arc surface a1 on the distal end side. Provide.

  The arc surface a1 has a shape that can generate a static frictional force F2 between the shoes 9 and 10 such that the door D is not closed by a light force such as a weak wind (soft wind). Further, the arc surface a2 has a shape that can generate a dynamic friction force F′1 between the shoes 9 and 10 to an extent that the operator can hardly feel when opening the door, for example. Yes. In the invention of the present embodiment, at least frictional force generated between the shoes 9, 10 and the arc surface a1 (static friction force F2, dynamic friction force F′2)> friction force generated between the arc surface a2 (static friction force). F1 and dynamic friction force F′1).

  The small groove portion 56 holds the shoes 9 and 10 by the static frictional forces F1 and F2 generated between the shoes 9 and 10 and the circular arc surface a1 and the circular arc surface a2 so that the door D can be held. By providing a plurality of small groove portions 56, the open state of the door D can be held in multiple stages.

  Further, by providing a plurality of small groove portions 56 on the second sliding contact surface portion 54, it is possible to form a gently curved surface. With this shape, even when the shoes 9 and 10 move in sliding contact with the plurality of small groove portions 56 in accordance with the opening / closing operation of the door D, a predetermined frictional force (dynamic frictional force F) is generated by the arc surfaces a1 and a2. Since “2> dynamic friction force F′1) can be generated and the opening / closing operation force can be kept constant without change, the operator can feel a smooth operation feeling (step in FIG. 6). (See (c) and (f)).

(First large groove)
As shown in FIGS. 4 and 5, the first large groove portion 57 is provided at substantially the center in the longitudinal direction of the check link 5 and is larger than the small groove portion 56 as described above. The holding part 9a, 10a has a substantially circular arcuate bottom, an inclined surface b1 on the base end side, and an inclined surface b2 on the distal end side so that the entire holding part 9a, 10a is depressed. I am doing. Thereby, the door D can be reliably held at the intermediate position.
In addition, the inclination angle α2 of the inclined surface b2 on the distal end side is made smaller than the inclination angle α1 of the inclined surface b1 on the proximal end side. In this way, by adjusting the inclination angle α2 of the inclined surface b2 on the distal end side to be smaller than the inclined surface b1 on the proximal end side in accordance with the arc surface a2 of the small groove portion 56, the operation in the opening operation of the door D is performed. It is possible to improve the performance.

(Second large groove)
As shown in FIGS. 4 and 5, the second large groove portion 58 is provided on the distal end side of the check link 5 as described above, and is larger than the small groove portion 56, and the holding portion for the shoes 9 and 10. 9a and 10a have a substantially circular arcuate bottom, an inclined surface c1 on the proximal end side, and an inclined surface c2 on the distal end side so that the entire shape is substantially square. There is no.
In addition, the second large groove 58 has an inclination angle β2 of the inclined surface c2 on the distal end side larger than an inclination angle β1 of the inclined surface c1 on the proximal end side. Thus, when the rear surface of the case 8 of the check structure 4 collides with the fully open stopper portion 55 of the check link 5, the impact can be suppressed by the frictional force generated between the inclined surface c <b> 2 and the shoes 9, 10. it can.
Further, the inclination angle of the inclined surface of the second large groove portion 58 is made larger than the inclination angle of the inclined surface of the first large groove portion 57. Thereby, the door D can be more reliably held at the fully opened position (see steps (d) and (e) in FIG. 6).

  As described above, the function (purpose) of the resistance (friction force) applied to the shoes 9 and 10 with respect to the small groove portion 56 and the large groove portions 57 and 58 in the first slidable contact surface portion 52, the slope portion 53, and the second slidable contact surface portion 54. It can be changed according to.

(Door opening and operating force)
With reference to FIG. 6, the opening degree (how open) of the door D of a motor vehicle provided with the door check apparatus 1 using the check link 5 except the 1st large groove part 57 of this invention, and the operation force of the door D The relationship is shown.

  For example, when the door D is opened from the fully closed position, as shown by X in FIG. 6, in the initial operation, the friction force of the first sliding contact surface portion 52 is hardly generated. Can be opened (step (a)). Next, since the frictional force gradually increases at the slope portion 53, the necessary operating force also gradually increases (step (b)). Thereafter, in the second sliding contact surface portion 54 having a plurality of small groove portions 56, the small groove portion 56 is formed with an arc surface a2 having a relatively small frictional force generated in the moving direction of the shoes 9, 10. The door D can be opened with a relatively small operating force. Further, by making the shape of the small groove portion 56 gentle, the operating force is made constant while generating a frictional force (step (c)). Then, the shoes 9 and 10 are inserted into the second large groove 58, and the door D is held in the fully open position (step (d)).

  On the other hand, when the door D is closed from the fully opened position, as shown in Y of FIG. 6, in the initial operation, a large operating force for removing the shoes 9 and 10 from the second large groove portion 58 is required. (Step (e)). Next, in the second sliding contact surface portion 54 having a plurality of small groove portions 56, the small groove portion 56 is formed with an arc surface a1 having a relatively large frictional force generated in the moving direction of the shoes 9, 10. For this reason, the frictional force is larger than in step (c) described above, and a relatively large operating force is required. Further, by making the shape of the small groove portion 56 gentle and making it an appropriate depth, the operating force is made constant while generating a frictional force (step (f)). Since the frictional force gradually decreases on the slope portion 53 and a component force of the biasing force against the slope portion 53 of the shoes 9, 10 is generated, the door can be closed with a small force (step (g)). And in the 1st sliding contact surface part 52, the door D can be made into a fully-closed state with the operation force similar to step (a) (step (h)).

As described above, the operation force of the door D when the second sliding contact surface portion 54 is moved with the opening operation of the door D is made relatively small, and the second sliding contact surface portion 54 is moved with the closing operation of the door D. By making the operation force of the door D relatively large, the door D can be opened easily, and the door D is difficult to close by an external force (for example, wind) other than the operation force. be able to.
Further, as described above, the plurality of small groove portions 56 of the second sliding contact surface portion 54 generates different frictional forces during the opening operation or closing operation of the door D, and makes the operation force constant. A smooth operational feeling can be obtained.
Since the door D is normally closed by swinging the door D and closing with the inertia of the door D, the frictional force of the arc surface a1 facing the moving direction from the distal end side to the proximal end side is somewhat large. However, there are cases where the operability is not affected.

  Although one embodiment of the present invention has been described above, the following modifications and changes can be made to the check link device of the present embodiment without departing from the scope of the present invention. In addition, it is possible to combine each structural requirement etc. in one Embodiment of the above-mentioned this invention, and the following modification.

(1) The small groove portion 56, the first large groove portion 57, and the second large groove portion 58 are disposed on the left and right surfaces instead of being disposed on the upper and lower surfaces of the second sliding contact surface portion 54. Moreover, it arrange | positions to both an up-down surface and a left-right surface. Further, in accordance with the shape of the shoes 9, 10, some are arranged on the upper and lower surfaces and others are arranged on the left and right surfaces.
(2) Instead of the circular arc surfaces a1 and a2 of the small groove portion 56, an inclined surface (resistance surface) which is a planar surface is used. In order to change the frictional force, the inclination angle of the inclined surface on the distal end side is made different from the inclination angle of the inclined surface on the proximal end side.
(3) The plurality of small groove portions 56 provided on the upper surface (left surface) of the second sliding contact surface portion 54 and the plurality of small groove portions 56 provided on the lower surface (right surface) of the second sliding contact surface portion 54 in the longitudinal direction. Slightly shifted. For example, by shifting the small groove portion 56 on the upper surface (left surface) by a half pitch (one pitch is an interval between the small groove portions 56) with respect to the small groove portion 56 on the lower surface (right surface), the second sliding contact surface portion 54 as a whole is obtained. The arrangement of the small groove portions 56 in the longitudinal direction can be made dense, and more holding positions can be secured.

(4) Surfaces a1 and b1 on the base end side of the arc surfaces a1 and a2 of the small groove portion 56 and the inclined surfaces b1 and b2 of the first large groove portion 57 in the second sliding contact surface portion 54 from the tip end side. Relax. That is, the frictional force of the shoes 9 and 10 accompanying the closing direction of the door D is reduced, and the operating force in the closing operation of the door D is reduced.
For example, by setting the dynamic friction force F′2 <the dynamic friction force F′1, the operation force at the time of closing the door D can be made relatively small, and the operator can perform the closing operation with a relatively light force. It can be carried out. In this case, since the static friction force is also small, the initial operation in the closing operation can be performed with a light force. On the other hand, the operation force at the time of opening the door can be made relatively large. For example, the door D is opened by an unexpected external force (wind or the like) similar to the operation force of the opening operation described above. Can be difficult.
(5) The check link 5 is provided with only one of the first large groove portion 57 and the second large groove portion 58.
(6) The check structure 4 in the door check device 1 is provided on the body B side, the base end portion of the check link 5 is supported by a fixed bracket fixed to the door D, and the distal end portion is in the body B. Try to insert.
(7) The resistance surface is formed by embossing. In this case, only one of the opening direction side (tip end side) and the closing direction side (base end side) of the small groove portion 56 is processed.

B Body D Door H Hinge a1, a2 Arc surface b1, b2 Inclined surface c1, c2 Inclined surface 1 Door check device 2 Fixing bracket 3 Axis 4 Check structure 5 Check link 51 Boss portion 52 First sliding contact surface portion 53 Inclined surface portion 54 Second sliding contact surface portion 55 Fully open stopper portion 56 Small groove portion 57 First large groove portion 58 Second large groove portion 6 Core material 61 Axial hole 62 Fully open stopper piece 7 Cover material 8 Case 81 Through hole 9, 10 Shoe 9a, 10a Holding portion 11 Elastic body

Claims (4)

A case fixed to either the door or the vehicle body;
A base end is swingably supported by either the door or the vehicle body, and a free end is an arm that penetrates the case;
A holding member that is provided in the case and moves in sliding contact with the outer surface of the arm along the longitudinal direction by opening and closing the door;
A biasing means provided in the case and biasing the holding member toward the outer surface of the arm;
An automotive door check link device comprising a plurality of small groove portions into which the holding member can be inserted into an outer surface in the longitudinal direction of the arm and a large groove portion deeper than the small groove portion ,
The large groove portion is provided on each of the free end side and the central side of the arm,
The plurality of small groove portions are respectively arranged between the base end of the arm and the large groove portion on the central side, and between the large groove portion on the central side and the large groove portion on the free end side, and in the opening direction. dynamic friction force <shall have a resistance surface for the closing direction of the dynamic frictional force,
The large groove portion on the center side has a resistance surface with dynamic frictional force in the opening direction <dynamic frictional force in the closing direction ,
The automobile door check link device characterized in that the large groove portion on the free end side has a resistance surface that makes dynamic friction force in the opening direction> dynamic friction force in the closing direction .
The plurality of small groove portions are provided on the upper and lower or left and right outer surfaces of the arm, and the small groove portions on the outer surface facing each other are shifted in the longitudinal direction of the arm,
The automobile door check link device according to claim 1, wherein the holding member is moved in sliding contact with the upper and lower or left and right outer surfaces of the arm by the pair of upper and lower or left and right holding members.   The resistance surface of the small groove portion is a concave arc-shaped arc surface, a first arc surface is provided on the base end side in the small groove portion, and a concave arc shape larger than the first arc surface is provided on the free end side. The automobile door check link device according to claim 1 or 2, wherein the second arc surface is provided.   The resistance surface of the small groove portion is an inclined surface having a predetermined inclination angle, a first inclined surface is provided on the proximal end side in the small groove portion, and an inclination angle is smaller on the free end side than the first inclined surface. The automobile door check link device according to claim 1, wherein a second inclined surface is provided.

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