JP2018041605A - Connector connection structure, connector and connector structural body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a connector to be stably retained in a housing body for a long period of time.SOLUTION: A connector connection structure comprises: a connector 3 having a cylindrical body part 30; and a housing body 12s in which the connector 3 is housed. The body part 30 includes: a pair of first projections 33 which protrude so as to abut on an inner peripheral surface 12i of the housing body 12s on the outer peripheral surface of the body part 30; and at least one second projection 34 which protrudes to a portion of the outer peripheral surface facing away from the pair of first projections 33 so as to abut on the inner peripheral surface 12i of the housing body 12s.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a connector connection structure, a connector, and a connector connection structure, and more particularly to a connector connection structure, a connector, and a connector connection structure used for a headrest of an automobile.

  2. Description of the Related Art Conventionally, for example, various electronic devices such as a monitor may be attached to a headrest of an automobile, and various connector connection structures are conventionally known for supplying electric power to these electronic devices and transmitting data. It has been.

  For example, some conventional connector connection structures include a connector having an elastic arm and a connector housing for housing the connector. The elastic arm includes an arm body, an engagement protrusion, and a contact portion. The engaging protrusion is formed in a square shape and is provided so as to protrude from the outer surface of the arm body. The contact portion is formed integrally with the engagement protrusion and is provided so as to protrude from the outer surface of the arm body. However, the protruding amount of the contact portion from the outer surface of the arm body is smaller than the protruding amount of the engaging protrusion from the outer surface. When the connector is accommodated in the connector housing, the engagement protrusion engages with the engagement hole of the connector housing, and the contact surface of the contact portion does not enter the engagement hole. It contacts the inner surface of the container. At this time, when the contact surface of the contact portion comes into contact with the inner surface of the connector housing, the elastic arm is pressed and bent in a direction away from the inner surface of the connector housing. Therefore, the contact portion of the elastic arm is always pressed against the inner surface of the container, and the engagement state between the engagement protrusion and the engagement hole of the connector container is maintained (see, for example, Patent Document 1). .

JP 2008-52980 A

  By the way, in the connector connection structure of patent document 1, in the state in which the connector was accommodated in the connector accommodating body (accommodating body), the stress was continuously applied to the elastic arm, and the elastic arm creeped over time. Deformation will occur. Due to this creep deformation, the engagement state between the engagement protrusion and the engagement hole of the connector housing is weakened, and the housing state of the connector with respect to the housing may become unstable.

  Then, this invention is made | formed in view of said subject, and provides the connector connection structure, connector, and connector connection structure which can hold | maintain a connector stably with respect to a container for a long period of time. With the goal.

  In order to achieve the above object, in the connector connection structure of the present invention, a connector having a cylindrical main body portion and a housing body for housing the connector are provided, and the main body portion is formed on the outer peripheral surface of the main body portion. A pair of first protrusions protruding so as to contact the inner peripheral surface of the container, and a portion of the outer peripheral surface facing the pair of first protrusions against the inner peripheral surface of the container. And at least one second protrusion protruding so as to be in contact therewith.

  Further, it is preferable that an elastic body portion is provided on an outer peripheral surface of the main body portion, and the first protrusion is provided on both sides of the elastic body portion along a longitudinal direction of the main body portion.

  The elastic body portion has a protrusion protruding toward the outer peripheral side in the radial direction, and the protrusion is engaged with an engagement hole of the container in a state where the connector is housed in the container. It is preferable.

  Moreover, it is preferable that the said 2nd protrusion extends along the longitudinal direction of the said main-body part, and the said connector is hold | maintained at the said container by being crushed in the state in which the said connector was accommodated in the said container. .

  Moreover, it is preferable that the contact surface of the first protrusion that contacts the inner peripheral surface of the container has an R shape.

  Furthermore, in order to achieve the above object, the connector of the present invention is a connector including a cylindrical main body portion that is inserted into the housing body, and the main body portion is formed on the outer peripheral surface of the main body portion. A pair of first protrusions that protrude so as to contact the inner peripheral surface of the housing, and a portion of the outer peripheral surface that faces away from the pair of first protrusions so as to contact the inner peripheral surface of the container. And at least one second protrusion.

  The outer peripheral surface of the main body is provided with an elastic body that bends in the radial direction of the main body, and the first protrusion is formed along the longitudinal direction of the main body. It is preferable to be provided on both sides.

  The elastic body portion has a protrusion protruding toward the outer peripheral side in the radial direction, and the protrusion is engaged with an engagement hole of the container in a state where the connector is housed in the container. It is preferable.

  Moreover, it is preferable that the said 2nd protrusion has a part in which the thickness of the said 2nd protrusion is reducing along the said insertion direction in the front end side of the insertion direction to the said container.

  Furthermore, in order to achieve the above object, the connector connection structure of the present invention includes a connector having a cylindrical main body portion accommodated in the housing body, an insertion-side connector that is inserted and fitted into the connector, A holder that integrally holds the insertion-side connector, and the main body portion has a pair of first protrusions that protrude so as to come into contact with the inner peripheral surface of the container, on the outer peripheral surface of the main body portion, It has at least 1 2nd protrusion which protruded so that it might contact | abut to the internal peripheral surface of the said container in the part of the said outer peripheral surface which faces a pair of said 1st protrusion.

  According to the present invention, the connector can be stably held for a long time with respect to the container.

It is a rough-line perspective view which shows the structure with which the connector connection structure which concerns on embodiment is mounted | worn to a headrest and the backrest part of a sheet | seat. It is a rough-line perspective view which shows the whole external appearance structure of the connector connection structure which concerns on embodiment. It is a rough-line perspective view which shows the whole external appearance structure when the connector connection structure which concerns on embodiment is decomposed | disassembled. It is an approximate line perspective view showing the state where the male connector concerning an embodiment was united with a stay. It is a rough-line perspective view which shows a structure when the male connector which concerns on embodiment is seen from the front side. It is a rough-line perspective view which shows a structure when the male connector which concerns on embodiment is seen from the back side. FIG. 7 is a cross-sectional view when the male connector according to the embodiment is cut along the line II in FIG. 6 in a state where the male connector is attached to the inner space of the stay. FIG. 3 is a schematic perspective view showing a configuration of a longitudinal section obtained by cutting the holder according to the embodiment along the line II-II in FIG. 3, and a plan view of the holder according to the embodiment as viewed from below in FIG. It is. It is a rough-line perspective view which shows the structure of the female connector which concerns on embodiment. It is sectional drawing which shows the fitting state of the holder which concerns on embodiment, and a female connector. It is a rough-line perspective view which shows the state set | placed in the facing position before the fitting of the male connector which concerns on embodiment, and a female connector. It is the front view which shows the rough-line perspective view and the opening edge which show the structure of the male connector which concerns on embodiment. It is a rough-line perspective view with which it uses for description of the formation principle of the opening edge and rotation induction structure which concern on embodiment. It is a rough-line perspective view with which it uses for description of the virtual model in the middle stage of the rotation induction structure which concerns on embodiment. It is a rough-line perspective view which shows the virtual model in the completion stage of the rotation induction structure which concerns on embodiment.

<Embodiment>
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments described below are merely examples, and various forms can be taken within the scope of the present invention.

  In the following drawings, for convenience of explanation, the upper side (atmosphere side) is the arrow a direction and the lower side (ground side) is the arrow b direction. Also, the left side is the arrow c direction, the right side is the arrow d direction, the front side is the arrow e direction, and the back side is the arrow f direction.

<Sheet>
As shown in FIG. 1, an automobile seat (seat) 1 includes a seat surface portion, a backrest portion 11, and a headrest 12 (not shown). A connector connection structure 2 as shown in FIGS. 2 and 3 is attached to the backrest 11 and the headrest 12 of the seat 1.

  The backrest 11 has a guide member 13 and a seat back unit 14. The guide member 13 is embedded in the backrest portion 11 with the through hole 13h exposed at an upper end portion (hereinafter also referred to as “upper end portion”) 11a of the backrest portion 11 (arrow a direction). It is. The seat back unit 14 is housed in a position separated by a predetermined distance vertically below the guide member 13 inside the backrest portion 11.

  The headrest 12 has, for example, a metal stay 12s made of two pipes protruding downward (in the direction of arrow b) from the headrest 12, and the male connector 3 is accommodated in the inner space of the stay 12s. Is possible. The stay 12s has an outer diameter smaller than the inner diameter of the through hole 13h of the guide member 13. The stay 12s is formed with an engagement hole 12h for engaging an elastic projection 38 (see FIG. 4) described later of the male connector 3.

  The guide member 13 guides the stay 12s of the headrest 12 to the upper side (arrow a direction) or the lower side (arrow b direction) through the through hole 13h. Note that the headrest 12 only moves up and down along the through hole 13h of the guide member 13, and does not move in the rotational direction.

  The seat back unit 14 is made of a plate-like member, and includes two holder housing members 15 fixed to the left side (arrow c direction) and the right side (arrow d direction) of the seat back unit 14. The holder accommodating member 15 has a cylindrical shape having an internal space, and is attached in a state where a substantially cylindrical holder 5 described later is accommodated in the internal space.

  In addition, the holder 5 is attached to the holder housing member 15, but is held in a state in which the holder 5 can rotate by a predetermined angle (for example, 25 degrees each) in both directions around the axis line x of the holder 5. ing.

<Connector connection structure mounted on seat>
As shown in FIGS. 2 and 3, the connector connection structure 2 includes a male connector 3 as a connector to be inserted, a holder 5, and a female connector 7 as an insertion side connector. Here, the connector connection structure 2 is attached in a state where the female connector 7 is integrated with the holder 5, and the male connector 7 integrated with the stay 12 s of the headrest 12 with respect to the female connector 7 integrated with the holder 5. It is a structure to which the connector 3 is detachably attached.

<Male connector integrated with stay>
As shown in FIG. 4, the male connector 3 is integrally attached in a state where the male connector 3 is accommodated in the inner space of the stay 12 s of the headrest 12 and only the opening 31 of the male connector 3 is exposed from the stay 12 s. Yes.

  The male connector 3 integrated with the stay 12s of the headrest 12 is inserted from the through hole 13h of the guide member 13 together with the stay 12s, and the upper side (arrow a direction) and the lower side (arrow b direction) along the guide member 13. Move to).

  Specifically, the male connector 3 has an insertion hole for inserting and fitting an insertion end 72 (see FIG. 3), which is a tip portion on the upper side (in the direction of arrow a) of the female connector 7, from the opening 31. 32.

  The male connector 3 is disposed at a position facing the insertion end 72 of the female connector 7 (hereinafter, also referred to as “facing position”), and is inserted when there is no rotational angle deviation between the two. The insertion end 72 of the female connector 7 is engaged with the inner wall of the hole 32.

  As shown in FIGS. 5 to 7, the male connector 3 includes a cylindrical main body 30 and an elastic body 37 formed integrally with the main body 30.

  The main body 30 is made of an insulating synthetic resin. A plurality of terminal accommodating chambers R are formed at the upper end (in the direction of arrow a) of the main body 30, as shown particularly in FIG. A terminal fitting is provided in the terminal accommodating chamber R.

  As shown in FIG. 7, the main body portion 30 has a substantially cylindrical cross-sectional shape having an outer diameter that can be accommodated in the inner space of the stay 12 s, and includes a bottom wall portion 30 a and a left side (arrow c) Direction) and the side wall portions 30b, 30b extending from the end on the right side (arrow d direction) toward the front side (arrow e direction), and the portion connecting the side wall portions 30b, 30b, and the bottom wall portion 30a It has the ceiling wall part 30k arranged oppositely. The bottom wall part 30a, the side wall parts 30b, 30b, and the top wall part 30k of the main body part 30 are integrally formed, the corner part of the bottom wall part 30a and the side wall parts 30b, 30b, and the side wall part 30b, Corners of 30b and the top wall 30k are formed in an R shape.

  In addition to the opening 31 into which the insertion end 72 of the female connector 7 is inserted, the main body 30 has a pair of first protrusions 33, a second protrusion 34, and an outer peripheral surface of the main body 30. The engaging protrusion 35 and the contact protrusion 36 are integrally formed.

  As shown in FIGS. 5A and 5B, the pair of first protrusions 33 extends from the opening 31 toward the upper side (arrow a direction) along the longitudinal direction (arrow ab direction) of the main body 30. These are ridge portions that extend and are provided on both the left and right sides (in the direction of the arrow cd) of the elastic body portion 37 to be described later.

  Specifically, the pair of first protrusions 33 extend to positions that are surely present on both the left and right sides of the elastic body portion 37 and on both the left and right sides of an elastic protrusion 38 to be described later. However, the present invention is not limited to this, and may extend upward (in the direction of arrow a) longer than the elastic body portion 37 as long as it extends to both the left and right sides of the elastic protrusion 38.

  In addition, as shown in FIGS. 7A and 7B, the pair of first protrusions 33 are arranged on the front side (arrow e) from the position where the elastic body portion 37 is sandwiched from both sides in the top wall portion 30 k of the main body portion 30. Projecting in the direction).

  The ends on the front side (in the direction of arrow e) of the pair of first protrusions 33 contact the male connector 3 and the inner peripheral surface 12i of the stay 12s in a state where the male connector 3 is accommodated in the inner space of the stay 12s. And has an R portion 33a formed in an R shape along the inner peripheral surface 12i. Note that the curvature of the R portion 33a preferably corresponds to the curvature of the inner peripheral surface 12i of the stay 12s, but it does not necessarily correspond as long as a curved surface that can come into surface contact with the inner peripheral surface 12i is formed. There is no need.

  The amount of protrusion (height) of the pair of first protrusions 33 from the outer surface 37a on the front side (in the direction of arrow e) of the elastic body portion 37 is higher than the outer surface 37a of the elastic body portion 37. It is formed lower than the protruding amount (height) of the elastic protrusion 38.

  As shown in FIG. 6, the second protrusion 34 is located above the opening 31 of the main body 30 (in the direction of arrow “a”) at a portion on the outer peripheral surface of the bottom wall 30 a that faces the pair of first protrusions 33. It is the protrusion part extended along the longitudinal direction which goes to. Specifically, the second protrusion 34 is a portion that comes into contact with the inner peripheral surface 12i of the stay 12s in a state where the male connector 3 is accommodated in the inner space of the stay 12s.

  As shown in FIG. 6, the cross-sectional shape of the 2nd protrusion 34 which contacts the internal peripheral surface 12i of the stay 12s is formed in R surface shape. Moreover, the 2nd protrusion 34 is a convex part extended toward the upper side (arrow a direction), and protruded to the back side (arrow f direction).

  The second protrusion 34 has a ridge portion 34a having a constant thickness on the upper side (in the direction of arrow a) from the opening 31 and the thickness from the end portion on the upper side (in the direction of arrow a) of the ridge portion 34a. And an inclined portion 34b formed so as to gradually decrease. That is, the inclined portion 34 b of the second protrusion 34 is inclined in a tapered shape from the top to the bottom wall 30 a of the main body 30 in a side view.

  In the illustrated embodiment, the case where only one second protrusion 34 is provided has been described. However, the present invention is not limited to this, and the bottom wall of the main body 30 facing away from the pair of first protrusions 33. A pair of second protrusions 34 may be provided at the position of the outer peripheral surface of the portion 30a, and more second protrusions 34 may be provided.

  As shown in FIG. 7, when the male connector 3 having such a configuration is accommodated in the inner space of the stay 12 s, the three of the pair of the first protrusion 33 and the second protrusion 34 are included in the stay 12 s. It will be supported by the peripheral surface 12i.

  The engagement protrusions 35 are a pair of functional units that engage with a lock arm 73 of the female connector 7 described later and release the engagement state between the holder 5 and the female connector 7 described later.

  The engagement protrusion 35 is a portion that protrudes outward in the radial direction in a state of being 180 ° apart from each other in the left (arrow c direction) and right (arrow d direction) cutout portions of the opening 31 of the main body 30.

  The engaging protrusion 35 has a flat outer peripheral surface 35a that forms the surface of the portion that protrudes most outward in the radial direction, and the protruding amount gradually decreases from the outer peripheral surface 35a downward (in the direction of arrow b). It has a formed slope 35b.

  The contact protrusions 36 are a pair of functional units that are provided adjacent to the upper side (in the direction of arrow a) of the engagement protrusions 35 and contact a lock arm 73 of the female connector 7 described later. The contact protrusion 36 is a portion that protrudes radially outward from the outer peripheral surface of the side wall portion 30 b of the main body portion 30.

  The contact protrusion 36 is formed so that the amount of protrusion gradually decreases from the outer peripheral surface 36a toward the lower side (in the direction of the arrow b). A slope 36b is provided.

  The elastic body portion 37 is a plate-like portion that bends in the direction of the axis x of the male connector 3 when the male connector 3 is accommodated in the stay 12s.

  As shown in FIG. 5, the elastic body portion 37 extends along the longitudinal direction of the main body portion 30 in a state in which the plate-like portion entirely protrudes from the top wall portion 30 k of the main body portion 30 to the front side (direction of arrow e). And is formed integrally with the main body 30. Specifically, one end portion on the lower side (in the arrow b direction) of the elastic body portion 37 is integrally connected to the top wall portion 30k of the main body portion 30 in the vicinity of the opening 31, and the upper end (in the arrow a direction). The other end is integrally connected to the main body 30 at a position away from the opening 31 by a predetermined distance.

  The elastic body portion 37 has a protrusion (hereinafter, also referred to as “elastic protrusion”) 38 that protrudes from the outer surface 37a of the elastic body portion 37 by a predetermined amount toward the front side (in the direction of arrow e). As shown in FIG. 4, the elastic protrusion 38 engages with the engagement hole 12h of the stay 12s when the male connector 3 is accommodated in the stay 12s.

  The elastic protrusion 38 is a flat outer surface 38a that forms the surface of the portion that protrudes most outward in the radial direction, and a slope that is formed so that the amount of protrusion gradually decreases from the outer surface 38a upward (in the direction of arrow a). 38b. Note that the protrusion amount of the elastic protrusion 38 is such that the outer surface 38a of the elastic protrusion 38 stays on the stay even when the dimensional tolerance of the outer diameter of the main body 30 is the maximum value and the dimensional tolerance of the inner diameter of the stay 12s is the minimum value. The height is set in advance so as not to protrude from the engagement hole 12h of 12s in the outer circumferential direction (see FIGS. 7A and 7B).

  The operation until the male connector 3 having such a configuration is housed in the inner space of the stay 12s and then attached in an integrated state with the stay 12s will be described. When the male connector 3 is inserted into the inner space of the stay 12s, the upper end (direction of arrow a) of the male connector 3 is inserted from the opening end 12e (see FIG. 4) of the stay 12s.

  At this time, the slope 38b of the elastic projection 38 of the elastic body portion 37 in the male connector 3 abuts against the opening end 12e of the stay 12s, so that the elastic body portion 37 is generally bent in the direction of the axis x, and then elastically The main body 30 is further pushed in while the outer surface 38a of the protrusion 38 and the inner peripheral surface 12i of the stay 12s are in contact with each other.

  When the main body portion 30 of the male connector 3 is further pushed into the inner space of the stay 12s and the elastic protrusion 38 reaches the position of the engagement hole 12h of the stay 12s, the elastic protrusion 38 is engaged with the engagement hole by the restoring force of the elastic body portion 37. The male connector 3 is in an attached state in which the movement is restricted in the longitudinal direction (arrow ab direction) while being engaged in the stay 12s.

  Further, when the male connector 3 is inserted into the inner space from the opening end 12e of the stay 12s, the R portions 33a of the pair of first protrusions 33 provided integrally with the top wall portion 30k of the main body portion 30 are formed on the stay 12s. The main body 30 is pushed in contact with the inner peripheral surface 12i.

  At the same time, while the inclined portion 34b of the second protrusion 34 of the main body 30 in the male connector 3 is in contact with the opening end 12e of the stay 12s, the stay 12s is further pushed in as the main body 30 is further pushed. The protruding portion 34a of the second protrusion 34 is gradually crushed by the inner peripheral surface 12i.

  Here, the protruding portion 34a of the second protruding portion 34 is “crushed” means that the protruding portion 34a before being accommodated in the stay 12s as the male connector 3 is pushed into the inner space of the stay 12s. This means that the shape is deformed. Since the protruding portion 34a in the crushed state has a restoring force to return to the original shape, the first protrusion 33 of the main body 30 is on the front side (in the direction of arrow e) of the inner peripheral surface 12i of the stay 12s. It is pressed against the part.

  As a result, the male connector 3 is firmly supported in a three-point support state pressed against the inner peripheral surface 12i of the stay 12s by the pair of first protrusions 33 and the second protrusions 34 formed on the main body 30. A connector connection structure that is supported and includes the male connector 3 and the stay 12s is realized.

  In a state where the male connector 3 is integrally attached to the stay 12s, the support of the male connector 3 with respect to the inner peripheral surface 12i of the stay 12s is performed only by the pair of first protrusions 33 and second protrusions 34 in the main body 30. The force that bends the elastic body portion 37 by the stay 12s does not act. Thus, it is possible to prevent creep deformation due to the continued bending of the elastic body portion 37 and to permanently maintain the engagement state between the elastic protrusion 38 and the engagement hole 12h of the stay 12s.

  Further, since the R portion 33a formed at the tip of the pair of first protrusions 33 comes into surface contact with the inner peripheral surface 12i of the stay 12s, the inner peripheral surface 12i of the stay 12s and the R portion 33a of the first protrusion 33 The frictional force at the time of abutment increases, and the main body 30 of the male connector 3 is firmly held against the inner peripheral surface 12i of the stay 12s.

  Further, the second protrusion 34 is provided with an inclined portion 34b at the upper end (in the direction of arrow a) of the protruding portion 34a, so that it is inclined when the male connector 3 is inserted into the inner space of the stay 12s. It is smoothly inserted along the portion 34b. Further, since the male connector 3 is smoothly inserted into the inner space of the stay 12s by the inclined portion 34b, the second protrusion 34 is damaged when the second protrusion 34 contacts the opening end 12e of the stay 12s. This can be prevented beforehand.

  Further, as shown in FIG. 7A, the male connector 3 is supported at three points of the pair of first protrusions 33 and second protrusions on the inner peripheral surface 12i of the stay 12s. The body part 37 is not elastically deformed. Therefore, in a state where the male connector 3 is accommodated in the inner space of the stay 12s, the elastic protrusion 38 of the elastic body portion 37 always has a constant engagement allowance L (for example, 1 mm) with respect to the engagement hole 12h of the stay 12s. It can be engaged. Note that the elastic protrusion 38 does not protrude from the engaging hole 12h in a state where the engaging protrusion 12h is engaged with a certain engagement allowance L.

  Further, as shown in FIG. 7B, even when the dimensional tolerance of the outer diameter of the male connector 3 is the maximum value and the dimensional tolerance of the inner diameter of the stay 12s is the minimum value, the elastic body portion 37 is elastically deformed. Therefore, the elastic protrusion 38 of the elastic body portion 37 can be engaged with the engagement hole 12h of the stay 12s with a certain margin P (for example, 0.01 mm).

  Therefore, in the state where the male connector 3 is attached to the inner space of the stay 12s, the elastic protrusion 38 of the elastic body portion 37 does not protrude from the engagement hole 12h of the stay 12s, and therefore the inner peripheral surface of the holder 5 is elastic. It is possible to prevent the protrusion 38 from abutting and the elastic body portion 37 from being elastically deformed and creep-deformed.

<Holder>
The holder 5 is made of, for example, an insulating synthetic resin, and has a substantially cylindrical cross-sectional shape as a whole. The cross-sectional shape of the holder 5 is not limited to a substantially cylindrical shape, and may be other shapes such as a rectangular tube shape. The holder 5 accommodates a female connector 7 which will be described later, and is attached and held integrally.

  As shown in FIG. 8, the holder 5 includes a holder main body 50 and a holder-side elastic lock arm 60 integrally formed on the inner peripheral surface of the holder main body 50. 8A is a longitudinal sectional view taken along the line II-II in FIG. 3, and FIG. 8B shows the holder 5 shown in FIG. It is a top view when it sees toward the upper side (arrow a direction).

  As shown in FIG. 8B, the holder main body 50 has a substantially cylindrical cross-sectional shape as a whole. The holder main body 50 includes a pair of flat portions 50s formed of a substantially flat plate-like portion extending along the axis x direction on the left side (arrow c direction) and the right side (arrow d direction), and a pair A pair of curved portions 50c each having a curved portion for connecting the flat portion 50s on the front side (arrow e direction) and the back side (arrow f direction).

  Four elastic arms 51 are formed integrally with the curved portion 50c at equal angular intervals at both ends of the outer peripheral surface of the curved portion 50c of the holder body 50. The elastic arm 51 extends along the longitudinal direction (arrow ab direction) of the holder body 50 in a state of projecting radially outward from the outer peripheral surface of the bending portion 50c. The four elastic arms 51 include an arm portion 51a and a contact end portion 51b provided at the tip of the arm portion 51a. When the holder 5 is accommodated in the holder accommodating member 15, the arm portion 51 a of the elastic arm 51 is bent and the abutting end portion 51 b elastically contacts the inner peripheral surface of the holder accommodating member 15.

  An annular tapered portion 50t (see FIG. 8A) is formed on the inner peripheral surface of the opening edge on the upper side (in the direction of arrow a) of the holder body 50. The taper portion 50 t functions as a guide portion when the male connector 3 is smoothly inserted from the opening edge of the holder 5.

  Two flat slits 52 extending along the longitudinal direction (arrow ab direction) are formed in the flat portion 50 s of the holder main body 50. In FIG. 8A, only the slit 52 of one flat portion 50s is shown. The two slits 52 extend in parallel to each other, and the portion between the two slits 52 becomes the elastic lock arm 60.

  Here, the slit 52 has an upper (arrow a direction) thin slit portion (hereinafter referred to as “thin slit portion”) 52a, a lower (arrow b direction) thin slit portion 52b, and a thin slit. A thick slit portion (hereinafter referred to as “thick slit portion”) 52c between the portions 52a and 52b. The thick slit portion 52c is formed such that the distance on the front side (arrow e direction) or the back side (arrow f direction) of the slit is longer (thicker) than the thin slit portions 52a and 52b.

  In the flat portion 50 s, the inner side wall portion 53 serving as a side end wall on the upper side in the longitudinal direction (in the direction of arrow a) of the thick slit portion 52 c is a female-side contact surface 75 c of the lock arm 73 of the female connector 7 (see FIG. 9). It functions as an abutting part to be abutted with. Here, the inner side wall part 53 is demonstrated as the holder side contact surface 53 below.

  In this case, in the flat portion 50 s, the holder-side contact surfaces 53 are formed so as to face each other on the front side (arrow e direction) and the back side (arrow f direction) with the elastic lock arm 60 as the center. The holder side contact surface 53 is inclined from the upper side (arrow a direction) to the lower side (arrow b direction) so as to come into surface contact with the female side contact surface 75c (see FIG. 9) of the lock arm 73. It is formed as an inclined surface.

  The elastic lock arm 60 is a portion that exists between the two slits 52 in the flat portion 50s of the holder body 50, and is an end portion on the upper side (arrow a direction) and lower side (arrow b direction) of the flat portion 50s. Are formed integrally with the flat portion 50s.

  The elastic lock arm 60 includes a convex lock protrusion 61 protruding toward the inside (axis line x) of the holder body 50. The lock protrusion 61 is provided on the inner surface of the holder body 50 so as to face the lock arm 73 of the female connector 7. The lock protrusion 61 is a portion that engages with the lock arm 73 of the female connector 7, and is disposed substantially at the center in the longitudinal direction (arrow ab direction) in the flat portion 50 s of the holder body 50. The lock protrusion 61 is disposed in the vicinity of the two holder-side contact surfaces 53 and below the holder-side contact surface 53 (in the direction of the arrow b).

  That is, the holder 5 is associated with the holder-side contact surface 53 that contacts the female-side contact surface 75c of the lock arm 73 of the female connector 7 and the engagement surface 75a of the lock arm 73 (see FIG. 9A). The mating lock protrusions 61 are provided at positions close to each other. That is, the holder-side contact surface 53 and the lock projection 61 are very close to each other on the upper side (arrow a direction) and the lower side (arrow b direction), and on the front side (arrow e direction) and back side (arrow f direction). Placed in position.

  The locking protrusion 61 is formed so that the flat protrusion surface 61a that forms the surface of the portion that protrudes most radially inward, and the protrusion amount gradually decreases from the protrusion surface 61a to the lower side (arrow b direction). It has the slope 61b made.

<Female connector integrated with holder>
As shown in FIGS. 9A and 9B, the female connector 7 includes a main body 71 and lock arms 73 formed integrally on the left and right sides (the arrow c direction and the arrow d direction) of the main body 71. I have. A plurality of terminal accommodating chambers R are formed at the upper end (direction a direction) of the main body 71. Inside the terminal accommodating chamber R, a terminal fitting that is mechanically and electrically connected to the terminal fitting of the male connector 3 is fixed and held.

  The main body 71 is made of an insulating synthetic resin, and is inserted into and fitted into the insertion hole 32 of the male connector 3, and has an insertion end portion 72 having a predetermined cross-sectional shape that is a tip portion of the main body 71. ing. As shown in FIG. 9 (B), the insertion end 72 has a base 72a having a substantially rectangular cross section corresponding to the concave shape of the inner wall of the insertion hole 32 of the male connector 3, and a front side integrated with the base 72a. Convex part 72b protruding in the direction of arrow e, integrated with base part 72a and large convex part 72c protruding with a large width on the back side (in the direction of arrow f), and back side integrated with base part 72a It has a small-width convex portion 72d that protrudes with a small width (in the direction of arrow f). In this case, the large convex portion 72c and the narrow convex portion 72d have a laminated shape in which the narrow convex portion 72d is integrally overlapped with the large convex portion 72c.

  The lock arm 73 is a portion that engages with the lock protrusion 61 of the holder 5 and is formed in a U shape. The lock arms 73 are provided on the left side (arrow c direction) and the right side (arrow d direction) of the base portion 72a of the main body 71, respectively. The lock arm 73 has a cantilevered support structure formed integrally with the main body 71 at the lower end (in the direction of arrow b). In other words, the upper end of the lock arm 73 (in the direction of arrow a) has an elastic structure that can approach or separate from the outer peripheral surface of the base 72 a of the main body 71.

  The lock arm 73 includes a pair of arm portions 74 extending along the main body 71 from the lower end portion in the lower side (arrow b direction) toward the upper end portion in the upper side (arrow a direction), and the pair of arm portions 74 on the upper side. And an engaging portion 75 which is a portion connected in the direction of arrow a. The pair of arm portions 74 in the engaging portion 75 extend parallel to each other on the front side (arrow e direction) and the back side (arrow f direction). The distance between the pair of arm portions 74 and the arm portions 74 is larger than the width w (see FIG. 8A) of the elastic lock arm 60 and the lock protrusion 61 of the holder 5.

  The engaging portion 75 is a portion formed at the upper end (in the direction of arrow a) of the pair of lock arms 73, and includes an engaging surface 75a, an inclined surface 75b, an upper end surface 75e, a female-side contact surface 75c, and It has a slope 75d. The engagement surface 75a is a flat surface formed inside the upper end (in the direction of arrow a) of the lock arm 73. The engagement surface 75a is a surface perpendicular to the longitudinal direction (arrow ab direction) toward the upper side (arrow a direction) and the lower side (arrow b direction), and is engaged with the lock protrusion 61 of the holder body 50. It is a surface.

  The slope 75b is a surface that is continuous from the engagement surface 75a, and is a tapered surface that is inclined upward (arrow a direction) toward the left side (arrow c direction) and the right side (arrow d direction) away from the main body 71. is there.

  The upper end surface 75e is a flat surface that faces away from the engagement surface 75a in the engagement portion 75 and is parallel to the engagement surface 75a. The upper end surface 75e is a surface formed at the outer end portion on the upper side (arrow a direction) of the engaging portion 75 of the lock arm 73.

  The female contact surface 75c is formed at the front (arrow e direction) and back (arrow f direction) end of the engagement portion 75 of the lock arm 73 (in the arrow a direction). The female-side contact surface 75c is a surface continuous from the upper end surface 75e, and moves downward (arrow b direction) from the upper end surface 75e toward the front side (arrow e direction) or the back side (arrow f direction). It is a taper surface inclined in the direction.

  The inclined surface 75d is a surface that is continuous from the upper end surface 75e and the female-side contact surface 75c, and is inclined downward (in the direction of arrow b) toward the main body 71 from the upper end surface 75e and the female-side contact surface 75c. Tapered surface.

  As described above, the engagement portion 75 of the lock arm 73 includes the engagement surface 75 a that engages with the lock protrusion 61 of the holder 5 and the female-side contact surface 75 c that contacts the holder-side contact surface 53 of the holder 5. The engaging portion 75 has a lower side (in the direction of arrow b) and an upper side (in the direction of arrow a) that are opposite to each other. As described above, the engagement surface 75a and the female-side contact surface 75c are formed so as to be integrated with each other in one engagement portion 75. That is, the engaging surface 75a and the female-side contact surface 75c of the engaging portion 75 are located close to each other in the same engaging portion 75.

  The operation until the female connector 7 having such a configuration is accommodated in the holder 5 and attached in a state of being integrated with the holder 5 will be described. FIG. 10A is a plan view when the state where the female connector 7 is attached to the holder 5 is viewed from the lower side (arrow b direction) that is the insertion direction. FIG. 10B is a cross-sectional view taken along the line BB in FIG. FIG. 10C is a cross-sectional view taken along the line CC in FIG. FIG. 10D is an enlarged view of a region AR surrounded by a broken line in FIG.

  When accommodating the female connector 7 in the holder 5, the insertion end 72 of the female connector 7 is inserted from below the holder 5 (in the direction of arrow b). At this time, the engaging portion 75 of the lock arm 73 of the female connector 7 rides on the slope 61 b of the lock protrusion 61 of the holder 5.

  Thereafter, when the female connector 7 is further pushed upward (in the direction of arrow a), the engaging surface of the engaging portion 75 immediately after the engaging portion 75 of the lock arm 73 passes through the protruding surface 61a of the lock protrusion 61. 75a and the lock projection 61 are engaged with each other, and the lock projection 61 is fitted between the two arm portions 74 and attached to the holder 5 while being integrally held.

  In a state where the female connector 7 is housed and attached integrally with the holder 5, the female-side contact surface 75 c of the female connector 7 is the holder of the holder 5 as shown in FIG. 10B and FIG. It abuts on the side abutment surface 53. Thereby, the movement of the holder 5 in the longitudinal direction (arrow ab direction) of the female connector 7 is restricted.

  At this time, the engaging portion 75 of the lock arm 73 of the female connector 7 and the lock protrusion 61 of the elastic lock arm 60 of the holder 5 and the female-side contact surface 75c of the lock arm 73 of the female connector 7 Since the contact portion with the holder-side contact surface 53 of the holder 5 exists in the vicinity of one engaging portion 75, the holder 5 caused by a dimensional error in the state where the female connector 7 is integrally attached to the holder 5 The backlash between the female connector 7 and the female connector 7 can be greatly reduced as compared with the conventional case.

  Further, the engaging portion 75 of the lock arm 73 of the female connector 7 and the lock protrusion 61 of the elastic lock arm 60 of the holder 5, and the female contact surface 75 c of the lock arm 73 of the female connector 7 and the holder. 5 is in the vicinity of one engaging portion 75 of the female connector 7, it is not necessary to provide a separate contact location at a position away from the engagement location.

  As a result, the front side (in the direction of arrow e) and the back side (in the direction of arrow f) between the holder 5 and the female connector 7 are secured wider than in the past, and the holder 5 and the female connector are secured. 7 can have a high degree of design freedom.

  In the state where the female-side contact surface 75 c of the lock arm 73 is in contact with the holder-side contact surface 53 of the holder 5, the surface opposite to the inclined surface 61 b of the lock projection 61 of the holder 5, and the lock arm 73. It is set so that a gap g of a certain level or more is always present between the engagement surface 75a (see FIG. 10D). For this reason, even if a dimensional error occurs in the lock arm 73 of the female connector 7 and the lock projection 61 of the holder 5, there is always a gap g, so that the engagement portion 75 of the lock arm 73 and the holder 5 are locked. The engaged state with the protrusion 61 can be ensured.

  When the male connector 3 integrated with the stay 12 s is inserted into the holder 5 to which the female connector 7 is integrally attached, the engagement protrusion 35 of the male connector 3 is formed between the lock arm 73 of the female connector 7 and the main body 71. The male connector 3 and the female connector 7 are fitted and terminal-connected to each other. In this state, the engaging portion 75 of the female connector 7 enters the recess between the engaging protrusion 35 and the abutting protrusion 36 of the male connector 3, so that the male connector 3 and the female connector 7 are held together. (See FIG. 11).

  Thereafter, when the male connector 3 integrated with the stay 12s is further pushed downward (in the direction of arrow b), the engagement between the female connector 7 and the holder 5 is released. Below, the operation | movement which cancels | releases engagement with the holder 5 and the female connector 7 is demonstrated.

  From the state in which the male connector 3 integrated with the stay 12s and the female connector 7 integrated with the holder 5 are fitted and terminal-connected to each other, the male connector 3 is moved downward together with the stay 12s of the headrest 12 (arrows). b), the inclined surface 35b of the engaging protrusion 35 of the male connector 3 comes into contact with the protruding surface 61a of the lock protrusion 61 of the holder 5, and presses the lock protrusion 61 outward in the radial direction of the holder 5. The elastic lock arm 60 is elastically deformed toward the outer side in the radial direction of the holder 5. In this case, the engagement protrusion 35 of the male connector 3 is in a state of attempting to release the engagement between the lock arm 73 of the female connector 7 and the lock protrusion 61 of the holder 5.

  When the male connector 3 attached integrally with the female connector 7 is further pushed in, the lock projection 61 of the holder 5 rides on the inclined surface 75b of the lock arm 73 of the female connector 7, and the engagement between the holder 5 and the female connector 7 occurs. The state is released. Since the engagement state of the female connector 7 is released from the holder 5 in a state where the male connector 3 and the female connector 7 are engaged, that is, in a state where the male connector 3 and the female connector 7 are integrated, the male connector 3 and the female connector 7 are free in the longitudinal direction (arrow ab direction).

<Rotation-inducing structure of male connector>
By the way, as shown in FIG. 1, when the headrest 12 is pushed down toward the seat back unit 14 via the guide member 13, as shown in FIG. 11, it is integrated with the stay 12s of the headrest 12 (not shown). The fixed male connector 3 and the female connector 7 attached integrally with the holder 5 (not shown) of the seat back unit 14 face each other in a predetermined position in the vertical and horizontal directions (hereinafter referred to as “facing” Ideally, it is also arranged at a position. In addition, in FIG. 11, the holder 5 is abbreviate | omitted for convenience.

  However, when the headrest 12 is pushed down toward the seat back unit 14, the male connector 3 and the female connector 7 are not disposed at the facing position, and the female connector 7 is located on the left side (arrow) around the axis line x. (c direction) or right side (arrow d direction) may be disposed at a non-facing position where a rotational angle shift has occurred.

  Therefore, the male connector 3 absorbs such a rotation angle shift between the male connector 3 and the female connector 7 and corrects both to the directly facing position and arranges the rotation-inducing structure 40 for the insertion hole 32. In preparation.

  Here, when the male connector 3 is pushed down toward the female connector 7, the rotation inducing structure 40 is such that the insertion end 72 of the female connector 7 is inserted into the insertion hole 32 of the male connector 3. It is the structure which induces rotation of the female connector 7 so that it may arrange | position in a facing position. The female connector 7 is integrally attached to the holder 5, but the holder 5 is centered on the axis x in the holder housing member 15 in both the left side (arrow c direction) and the right side (arrow d direction). It is attached so as to be rotatable by a predetermined angle (for example, 20 degrees each).

  The rotation inducing structure 40 of the male connector 3 includes an opening edge 41 and a plurality of inner peripheral surfaces 42 as shown in FIGS. The opening edge 41 is a portion that becomes an opening when the insertion end 72 of the female connector 7 is inserted into the insertion hole 32 of the male connector 3. The inner peripheral surface 42 is an inclined surface that is inclined at an angle that induces rotation of the female connector 7 so that the male connector 3 and the female connector 7 are arranged in a mutually facing position. Here, the inner peripheral surface 42 includes a plurality of surfaces having the same or different shapes and sizes.

  The opening edge 41 of the rotation-inducing structure 40 has a female edge in the insertion hole 32 even when the insertion end 72 of the female connector 7 is deviated from the directly-facing position with respect to the insertion hole 32 of the male connector 3. The connector 7 has a shape into which the insertion end 72 can be inserted.

  Specifically, the opening edge 41 has a left side (arrow c direction) and a right side (arrow d direction) centering on the axis line x of the female connector 7 integrated with the holder 5 (which coincides with the axis line x of the male connector 3). ) In both directions, the shape corresponds to the rotation trajectory of each top of the base 72a to the narrow protrusion 72d of the insertion end 72. In this case, the opening edge 41 is formed by a plurality of circular arc shapes because it is a rotation locus of each apex when rotating about the axis x.

  When the insertion end 72 of the female connector 7 is inserted into the insertion hole 32 of the male connector 3, the inner peripheral surface 42 of the rotation induction structure 40 is inserted until the insertion end 72 is inserted from the opening edge 41 to a predetermined distance. Further, it is a slope inclined at an angle that gradually (linearly) rotates the insertion end 72 of the female connector 7 toward the directly facing position.

  That is, the inner peripheral surface 42 of the rotation inducing structure 40 has a left side and a left side as the insertion end 72 is inserted in the insertion depth direction until the male connector 3 and the female connector 7 are in a directly-facing position. It is a slope on which the female connector 7 rotates linearly at a rotation induction angle of 4 degrees / mm in both directions on the right side. However, the rotation induction angle is not limited to this, and may be a rotation induction angle of 5 degrees / mm in both the left and right directions. The rotation-inducing angle means that when the insertion end 72 of the female connector 7 is inserted into the insertion hole 32 of the male connector 3, the female connector 7 moves in both the left and right directions when inserted 1 mm in the insertion depth direction. It is an angle induced to rotate by a predetermined angle. When the rotation induction angle is 5 degrees / mm or less, the insertion property when the insertion end portion 72 of the female connector 7 is inserted into the insertion hole 32 of the male connector 3 is preferable.

  Here, the predetermined distance indicating how far the inner peripheral surface 42 of the rotation inducing structure 40 is formed from the opening edge 41 is a length of half or less with respect to the insertion depth direction of the insertion hole 32 from the opening edge 41, For example, 5 mm. However, this distance does not necessarily need to be 5 mm, and may be 5 mm or less or 5 mm or more.

  However, if the predetermined distance is too shorter than 5 mm, the rotation inducing structure 40 rotates the female connector 7 at an abrupt angle, and therefore a great load is applied to the holder 5 and the female connector 7. On the other hand, if the predetermined distance is longer than 5 mm, the insertion end portion 72 of the female connector 7 is not disposed at the directly-facing position with respect to the insertion hole 32 of the male connector 3, and the rotational angle deviation between the two is not eliminated. become. Accordingly, the predetermined distance is preferably 4 mm to 6 mm from the opening edge 41, and particularly preferably 5 mm.

  Thus, when the insertion end portion 72 of the female connector 7 is inserted from the opening edge 41 to a depth of a predetermined distance of 5 mm, the rotation inducing structure 40 rotates the female connector 7 with the plurality of inner peripheral surfaces 42, so that the male connector 3 and the insertion end portion 72 of the female connector 7 can be corrected to the directly facing position.

  Next, the formation process of the opening edge 41 and the inner peripheral surface 42 in the rotation induction structure 40 of the male connector 3 will be described. As shown in FIGS. 13A and 13A, the insertion end 72 is inserted in a state where the insertion end 72 of the female connector 7 is disposed at the directly-facing position with respect to the insertion hole 32 of the male connector 3. A basic shape is a rectangular cross section having a plurality of apexes in a cross section perpendicular to the direction. However, the cross-sectional shape of the insertion end portion 72 in FIG. 13 is simple, and for convenience, only the base portion 72a, the convex portion 72b, the large convex portion 72c, and the small-width convex portion 72d are noted. The rotation center of the insertion end 72 is a point O.

  In this case, in the base part 72a, the convex part 72b, the large convex part 72c, and the small-width convex part 72d of the insertion end part 72, the top parts A1, A10 of the convex part 72b, the top parts A2, A3, A8, A9 of the base part 72a, the large convex part The top parts A4 and A7 of 72c and the top parts A5 and A6 of the narrow convex part 72d are defined.

  Consider a case where such an insertion end 72 is inserted by a predetermined distance L (in this case, L = 5 mm as described above) from the opening edge 41 of the rotation induction structure 40 in the male connector 3 in the insertion depth direction. In this case, virtual tops A′1 to A′10 corresponding to the tops A1 to A10 that are advanced from the tops A1 to A10 by a predetermined distance L (5 mm) in parallel along the axis x are defined.

  Thereafter, as shown in FIG. 13B, the insertion end portion 72 of the female connector 7 is rotated 20 degrees from the directly facing position (FIGS. 13A and 13A) to the left about the axis x. At this time, the top portions A1 to A10 change to the top portions B1 to B10 based on the locus of the insertion end portion 72 rotated 20 degrees to the left.

  And as shown to FIG. 13 (B '), the top parts B1-B10 and the virtual top parts A'1-A'10 are tied according to the mutually same number. In this case, the top B1 and the virtual top A′1 are connected by a straight line, the top B2 and the virtual top A′2 are connected by a straight line, and the top B10 and the virtual top A′10 are connected by a straight line. .

  Similarly, the insertion end 72 of the female connector 7 is rotated 20 degrees to the right about the axis line x from the directly facing position (FIGS. 13A and 13A). At this time, the top portions A1 to A10 change to the top portions C1 to C10 based on the locus of the insertion end portion 72 rotated 20 degrees to the right.

  And as shown in FIG.13 (C '), the top parts C1-C10 and the virtual top parts A'1-A'10 are tied according to the mutually same number. In this case, the top C1 and the virtual top A′1 are connected by a straight line, the top C2 and the virtual top A′2 are connected by a straight line, and the top C10 and the virtual top A′10 are connected by a straight line. .

  As a result, as shown in FIG. 14, the top portions B1 to B10 and the virtual top portions A′1 to A′10 are connected according to the same number, and the top portions C1 to C10 and the virtual top portions A′1 to A′10 are connected. Are generated according to the same number.

  In this virtual model VM1, as shown in FIG. 15A, the top portions A1 to A10, the top portions B1 to B10, and the top portions C1 to C10 are connected according to the same number. In this case, the top A1, the top B1, and the top C1 are connected by an arcuate curve R1, the top A2, the top B2, and the top C2 are connected by an arcuate curve R2, and the top A10, the top B10, and the top C10 are circles. It is connected by an arcuate curve R10.

  Thereafter, the curves R1 to R10 and the virtual apexes A′1 to A′10 are connected in accordance with the same numbers, and a plurality of outer peripheral surfaces G42 each having a substantially triangular region connected to each other are formed, thereby generating a virtual model VM2. Can be generated. Here, as shown in FIG. 15B, for example, a substantially triangular region connecting the curve R9 connecting the top A9, the top B9, and the top C9 and the virtual top A′9 becomes the outer peripheral surface G42. . In addition, this outer peripheral surface G42 is formed in the curved surface inclined according to curve R9.

  In this outer peripheral surface G42, the line segment A9-A'9 connecting the top A9 and the virtual top A'9 corresponds to the true insertion depth of the insertion end 72 of the female connector 7, and this embodiment In this case, the length of the line segment A9-A′9 is a predetermined distance L = 5 mm. Of the line segment A9-A'9, a position advanced by 1 mm from the top A9 toward the virtual top A'9 is defined as a point X.

  On the line segment B9-A'9 that is the outer edge of the outer peripheral surface G42, a position advanced by 1 mm in the insertion depth direction from the curve R9 (the arc-shaped portion connecting the top B9, the top A9, and the top C9). A point Y is defined. This point Y can also be said to be a point that intersects with the line segment B9-A'9 when translated from the curve R9 by 1 mm parallel to the line segment A9-A'9 in the insertion depth direction. A position that intersects the curve R9 when extending from the point Y along the line A9-A'9 toward the curve R9 is defined as a point Z.

  A position on the line segment C9-A′9 that is the outer edge of the outer peripheral surface G42 and advanced from the curve R9 by 1 mm in the insertion depth direction is defined as a point V. This point V can also be said to be a point that intersects the line segment C9-A'9 when translated from the curve R9 by 1 mm parallel to the line segment A9-A'9 in the insertion depth direction. A position that intersects the curve R9 when extending from the point V along the line A9-A'9 toward the curve R9 is defined as a point W.

  In this case, the angle ∠B9, O, Z and the angle ∠C9, O, W are the above-described rotation induction angles (degrees / mm) on the outer peripheral surface G42. That is, as the point Y advances in the insertion depth direction on the segment B9-A'9 that is the outer edge of the outer peripheral surface G42 from the top B9 to the virtual top A'9, the rotation induction angle ∠B9, O , Z induces a rotation of up to 20 degrees at 4 degrees / mm. Similarly, as the point V advances in the insertion depth direction on the line segment C9-A′9 which is the outer edge of the outer peripheral surface G42 from the top C9 to the virtual top A′9, the rotation induction angle ∠C9, O and W induce a rotation of a maximum of 20 degrees at 4 degrees / mm.

  Assuming that the virtual model VM2 formed with such a plurality of outer peripheral surfaces G42 is hollowed out from the lower end (in the direction of arrow b) of the male connector 3, an opening edge 41 having curves R1 to R10, and a plurality The rotation inducing structure 40 having a plurality of inner peripheral surfaces 42 corresponding to the outer peripheral surface G42 is formed in the insertion hole 32 of the male connector 3. In practice, the male connector 3 provided with such a rotation inducing structure 40 can be formed by injection molding.

  When the male connector 3 having such a rotation induction structure 40 is pushed down toward the female connector 7 integrated with the holder 5 while being integrated with the stay 12s of the headrest 12, the opening of the rotation induction structure 40 is opened. The insertion end 72 of the female connector 7 is inserted from the edge 41.

  At this time, in the female connector 7, the insertion end portion 72 is inserted from the opening edge 41 of the rotation inducing structure 40 of the male connector 3, and the female connector 7 is held together with the holder 5 by the plurality of inner peripheral surfaces 42. Are rotated clockwise or counterclockwise within a range of 20 degrees at the maximum, and are arranged at the directly facing positions.

  Therefore, since the insertion hole 32 of the male connector 3 and the insertion end portion 72 of the female connector 7 are disposed at the directly opposed positions, the insertion end portion 72 of the female connector 7 is finally formed with respect to the inner wall of the male connector 3. It is possible to realize a connector connection structure in which is fitted.

  Thus, even when the male connector 3, the holder 5, and the female connector 7 integrated with the holder 5 are fitted and fixed, the rotational angle deviation between the male connector 3 and the female connector 7 is corrected to be fitted to each other. The connector connection structure 2 that can be fixed can be realized.

<Other embodiments>
In the above-described embodiment, the case where the holder 5 integrated with the female connector 7 is rotatably mounted in the holder housing member 15 has been described, but the present invention is not limited thereto. Instead, the male connector 3 attached to the stay 12s of the headrest 12 may be rotatably attached in the stay 12s. In this case, the holder 5 need not be rotatably mounted in the holder housing member 15.

  Further, in the above-described embodiment, the virtual end composed of the opening edge 41 and the outer peripheral surface G42 along the trajectory by rotating the insertion end 72 of the female connector 7 from the directly facing position to the left and right about the axis x. Although the case where the rotation inducing structure 40 having a plurality of inner peripheral surfaces 42 is formed in the insertion hole 32 of the male connector 3 based on the model VM2 has been described, the present invention is not limited to this, and the insertion end 72 The rotation inducing structure 40 is formed based on the virtual model VM2 including the opening edge 41 and the outer peripheral surface G42 along the trajectory by rotating only from the directly facing position to the left side or the right side about the axis x. You may do it.

  Further, the preferred embodiment as described above has been described, but the present invention is not limited to the connector connection structure 2 according to the above embodiment, and is included in the concept of the present invention and the scope of the claims. Including all embodiments. In addition, the respective configurations may be selectively combined as appropriate so as to achieve at least part of the above-described problems and effects. For example, the shape, material, arrangement, size, and the like of each component in the above embodiment can be changed as appropriate according to the specific usage mode of the present invention.

1 Sheet 2 Connector Connection Structure 3 Male Connector (Connector)
5 Holder (holder)
7 Female connector (insertion side connector)
11 Backrest 12 Headrest 12e Open end 12s Stay (container)
12h engagement hole 12i inner peripheral surface 13 guide member 13h through hole 14 seat back unit 15 holder housing member 30 main body 30k top wall 31 opening 32 insertion hole 33 first protrusion 34 second protrusion 35 engagement protrusion ( Protrusion)
35a outer peripheral surface 35b slope 36 abutting projection 36a outer peripheral surface 36b slope 37 elastic body portion 37a outer surface 38b slope 38 elastic projection 38a outer surface 40 rotation induction structure 41 opening edge 42 inner peripheral surface 50 holder main body 51 elastic arm 52 slit 53 holder side contact Contact surface (contact part)
60 Elastic lock arm 61 Lock protrusion (lock protrusion)
61a Projecting surface 61b Slope 71 Main body 72 Insertion end 72a Base 72b Projection 72c Large projection 72d Small projection 73 Lock arm 74 Arm 75 Engagement part 75a Engagement surface 75b Slope 75c Female side contact surface 75d Slope 75e Upper side End face A1-A10, B1-B10, C1-C10 Top part A'1-A'10 Virtual top part L Predetermined distance VM1, VM2 Virtual model R1-R10 Curve G42 Outer peripheral surface

Claims (10)

A connector having a cylindrical main body, and
A housing for housing the connector;
With
The main body is
A pair of first protrusions protruding so as to contact the inner peripheral surface of the container on the outer peripheral surface of the main body;
At least one second protrusion projecting so as to abut on the inner peripheral surface of the housing body on the portion of the outer peripheral surface facing away from the pair of first protrusions;
A connector connection structure characterized by comprising: The outer peripheral surface of the main body is provided with an elastic body that bends in the radial direction of the main body,
The connector connection structure according to claim 1, wherein the first protrusion is provided on both sides of the elastic body along the longitudinal direction of the main body. The elastic body portion has a protrusion protruding toward the outer peripheral side in the radial direction,
The connector connection structure according to claim 2, wherein the protrusion is engaged with an engagement hole of the container in a state where the connector is housed in the container. The second protrusion is
The said connector is hold | maintained at the said accommodating body by extending along the longitudinal direction of the said main-body part, and being crushed in the state in which the said connector was accommodated in the said accommodating body. The connector connection structure according to any one of the above.   5. The connector connection structure according to claim 1, wherein a contact surface of the first protrusion that contacts the inner peripheral surface of the container has an R shape. . A connector comprising a cylindrical main body inserted into a container,
The main body is
On the outer peripheral surface of the main body, a pair of first protrusions protruding so as to contact the inner peripheral surface of the container,
At least one second protrusion projecting so as to abut on the inner peripheral surface of the housing body on the portion of the outer peripheral surface facing away from the pair of first protrusions;
A connector comprising: The outer peripheral surface of the main body is provided with an elastic body that bends in the radial direction of the main body,
The connector according to claim 6, wherein the first protrusion is provided on both sides of the elastic body along the longitudinal direction of the main body. The elastic body portion has a protrusion protruding toward the outer peripheral side in the radial direction,
The connector according to claim 7, wherein the protrusion is engaged with an engagement hole of the housing body in a state where the connector is housed in the housing body. The second protrusion is
9. The method according to claim 6, further comprising: a portion in which the thickness of the second protrusion decreases along the insertion direction on a distal end side in the insertion direction of the container. The connector described. A connector having a cylindrical main body housed in the housing;
An insertion side connector to be inserted and fitted into the connector;
A holder for integrally holding the insertion-side connector;
With
The main body is
On the outer peripheral surface of the main body, a pair of first protrusions protruding so as to contact the inner peripheral surface of the container,
At least one second protrusion projecting so as to abut on the inner peripheral surface of the housing body on the portion of the outer peripheral surface facing away from the pair of first protrusions;
The connector connection structure characterized by having.

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