JP6789735B2 - Connector connection structure, connector and connector connection structure - Google Patents

Description

The present invention relates to connector connection structures, connectors and connector connection structures, and more particularly to connector connection structures, connectors and connector connection structures used in automobile headrests.

Conventionally, for example, various electronic devices such as monitors may be attached to the headrests of automobiles, and various connector connection structures have been conventionally known in order to supply electric power or transmit data to these electronic devices. Has been done.

For example, a conventional connector connection structure includes a connector having an elastic arm and a connector accommodating body for accommodating the connector. The elastic arm includes an arm body, an engaging protrusion, and a contact portion. The engaging protrusions are formed in a square shape and are provided convexly from the outer surface of the arm body. The abutting portion is formed integrally with the engaging protrusion and is provided so as to be convex from the outer surface of the arm body. However, the amount of protrusion of the contact portion from the outer surface of the arm body is smaller than the amount of protrusion of the engaging protrusion from the outer surface. When the connector is housed in the connector housing, the engaging projection engages with the engaging hole of the connector housing, and the contact surface of the contact portion becomes the connector without the contact portion entering the engaging hole. It comes into contact with the inner surface of the housing. At this time, when the contact surface of the contact portion is brought 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 abutting portion of the elastic arm is always pressed against the inner surface of the housing body, and the engaging state between the engaging protrusion and the engaging hole of the connector housing body is maintained (see, for example, Patent Document 1). ..

Japanese Unexamined Patent Publication No. 2008-52980

By the way, in the connector connection structure of Patent Document 1, stress is continuously applied to the elastic arm in a state where the connector is accommodated in the connector accommodating body (accommodating body), and creeps on the elastic arm with the passage of 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.

Therefore, the present invention has been made in view of the above problems, and provides a connector connection structure, a connector, and a connector connection structure capable of stably holding a connector for a long period of time with respect to an accommodating body. With the goal.

In order to achieve the above object, the connector connection structure of the present invention includes a connector having a tubular main body portion and an accommodating body for accommodating the connector, and the main body portion is provided on an outer peripheral surface of the main body portion. The pair of first protrusions protruding so as to abut against the inner peripheral surface of the housing and the outer peripheral surface facing the pair of first protrusions are in contact with the inner peripheral surface of the housing. It is characterized by having at least one second protrusion protruding so as to be in contact with the other.

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

Further, 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 housing body in a state where the connector is housed in the housing body. Is preferable.

Further, it is preferable that the second protrusion extends along the longitudinal direction of the main body portion, and the connector is held by the housing body by being crushed while the connector is housed in the housing body. ..

Further, it is preferable that the contact surface of the first protrusion that contacts the inner peripheral surface of the housing body has an R shape.

Further, in order to achieve the above object, the connector of the present invention is a connector including a tubular main body to be inserted into the housing, and the main body is the housing on the outer peripheral surface of the main body. A pair of first protrusions protruding so as to abut the inner peripheral surface of the housing and a portion of the outer peripheral surface facing the pair of first protrusions so as to abut the inner peripheral surface of the housing. It is characterized by having at least one second protrusion and the like.

Further, an elastic body portion that bends in the radial direction of the main body portion is provided on the outer peripheral surface of the main body portion, and the first protrusion portion of the elastic body portion is provided along the longitudinal direction of the main body portion. It is preferably provided on both sides.

Further, 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 housing body in a state where the connector is housed in the housing body. Is preferable.

Further, it is preferable that the second protrusion has a portion on the tip end side in the insertion direction into the container in which the wall thickness of the second protrusion decreases along the insertion direction.

Further, in order to achieve the above object, the connector connection structure of the present invention includes a connector having a tubular main body portion accommodated in the accommodating body, an insertion side connector inserted into the connector and fitted. A holder for integrally holding the insertion-side connector is provided, and the main body portion has a pair of first protrusions protruding so as to abut the inner peripheral surface of the housing body on the outer peripheral surface of the main body portion. It is characterized in that the portion of the outer peripheral surface facing the pair of the first protrusions has at least one second protrusion protruding so as to abut the inner peripheral surface of the housing.

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

FIG. 5 is a schematic perspective view showing a structure in which the connector connection structure according to the embodiment is attached to the headrest and the backrest portion of the seat. It is a schematic perspective view which shows the overall appearance structure of the connector connection structure which concerns on embodiment. It is a schematic perspective view which shows the overall appearance structure when the connector connection structure which concerns on embodiment is disassembled. It is a schematic perspective view which shows the state which the male connector which concerns on embodiment is integrated with a stay. It is a schematic perspective view which shows the structure when the male connector which concerns on embodiment is seen from the front side. It is a schematic perspective view which shows the structure when the male connector which concerns on embodiment is seen from the back side. It is a cross-sectional view when the male connector according to the embodiment is attached to the inner space of the stay, and is cut along the line I-I of FIG. A schematic perspective view showing the configuration of a vertical cross section of the holder according to the embodiment cut along the lines II-II of FIG. 3, and a plan view of the holder according to the embodiment as viewed from below in FIG. Is. It is a schematic 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 and the female connector which concerns on embodiment. FIG. 5 is a schematic perspective view showing a state in which the male connector and the female connector according to the embodiment are placed in a facing position before fitting. It is the schematic perspective view which shows the structure of the male connector which concerns on embodiment, and the front view which shows the opening edge. It is a schematic perspective view provided for the explanation of the formation principle of the opening edge and the rotation-induced structure which concerns on embodiment. It is the schematic perspective view which provides the explanation of the virtual model in the middle stage of the rotation induction structure which concerns on embodiment. It is a schematic perspective view which shows the virtual model at the completion stage of the rotation-induced structure which concerns on embodiment.

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

In the following figures, for convenience of explanation, the upper side (atmosphere side) is in the direction of arrow a and the lower side (ground side) is in the direction of arrow b. Further, 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 (not shown), a backrest portion 11, and a headrest 12. The connector connection structure 2 as shown in FIGS. 2 and 3 is attached to the backrest portion 11 and the headrest 12 of the seat 1.

The backrest portion 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 the end portion (hereinafter, also referred to as “upper end portion”) 11a of the backrest portion 11 above (in the direction of arrow a). It has been. The seat back unit 14 is housed inside the backrest portion 11 at a position vertically below the guide member 13 by a predetermined distance.

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 accommodates the male connector 3 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. Further, the stay 12s is formed with an engaging hole 12h for engaging the elastic protrusion 38 (see FIG. 4) described later of the male connector 3.

The guide member 13 guides the stay 12s of the headrest 12 upward (in the direction of arrow a) or downward (in the direction of arrow b) through the through hole 13h. It is assumed 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 rotation direction.

The seat back unit 14 is composed of a plate-shaped member, and includes two holder accommodating 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 the substantially cylindrical holder 5 described later is accommodated in the internal space.

Further, although the holder 5 is attached to the holder accommodating member 15, it is held in a state in which it can be rotated by a predetermined angle (for example, 25 degrees each) in both directions about the axis x of the holder 5 in the internal space thereof. ing.

<Connector connection structure attached to the seat>
As shown in FIGS. 2 and 3, the connector connection structure 2 includes a male connector 3 as an insertable connector, 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 female connector 7 integrated with the holder 5 is integrated with the stay 12s of the headrest 12. It is a structure to which the connector 3 can be detachably attached.

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

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

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

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

As shown in FIGS. 5 to 7, the male connector 3 includes a tubular main body portion 30 and an elastic body portion 37 integrally formed with the main body portion 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 (direction of arrow a) of the main body 30 as shown in FIG. 5 (B). A terminal fitting is provided in the terminal accommodating chamber R.

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

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

As shown in FIGS. 5A and 5B, the pair of first protrusions 33 are directed from the opening 31 toward the upper side (arrow a direction) along the longitudinal direction (arrow ab direction) of the main body 30. It is a ridge portion extending and provided on both left and right sides (arrow cd direction) in the circumferential direction of the elastic body portion 37 described later.

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

Further, as shown in FIGS. 7A and 7B, the pair of first protrusions 33 are 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 30k of the main body portion 30. (Direction).

The front end (direction of arrow e) of the pair of first protrusions 33 abuts on the inner peripheral surface 12i of the male connector 3 and the stay 12s in a state where the male connector 3 is housed in the inner space of the stay 12s. It is a portion to be formed, and has an R portion 33a formed in an R plane along the inner peripheral surface 12i. 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 to the curvature of the inner peripheral surface 12i as long as a curved surface capable of surface contact is formed. There is no need.

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

As shown in FIG. 6, the second protrusion 34 is located on the outer peripheral surface of the bottom wall portion 30a facing back to the pair of first protrusions 33, and is located above the opening 31 of the main body 30 (direction of arrow a). It is a protruding portion extending along the longitudinal direction toward. 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 housed in the inner space of the stay 12s.

As shown in FIG. 6, the cross-sectional shape of the second protrusion 34 in contact with the inner peripheral surface 12i of the stay 12s is formed in an R-plane shape. Further, the second protrusion 34 is a convex portion extending toward the upper side (direction of arrow a) and protruding toward the back side (direction of arrow f).

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

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

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

The engaging protrusion 35 is a pair of functional portions that engage with the lock arm 73 of the female connector 7 described later and release the engaged state between the holder 5 and the female connector 7 described later.

The engaging protrusion 35 is a portion of the opening 31 of the main body 30 that protrudes outward in the radial direction in a state of being separated from each other by 180 ° at the notched portions on the left side (arrow c direction) and the right side (arrow d direction).

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

The abutting protrusion 36 is provided adjacent to the upper side (arrow a direction) of the engaging protrusion 35, and is a pair of functional portions that come into contact with the lock arm 73 of the female connector 7, which will be described later. The abutting protrusion 36 is a portion protruding outward in the radial direction from the outer peripheral surface of the side wall portion 30b of the main body portion 30.

The abutting protrusion 36 is formed so that the flat outer peripheral surface 36a forming the surface of the most protruding portion in the radial direction and the amount of protrusion gradually decrease from the outer peripheral surface 36a toward the lower side (direction of arrow b). It has a slope 36b.

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

As shown in FIG. 5, the elastic body portion 37 has a plate-shaped portion protruding from the top wall portion 30k of the main body portion 30 toward the front side (direction of arrow e) as a whole along the longitudinal direction of the main body portion 30. It extends and is integrally formed with the main body 30. Specifically, one end of the lower side (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 is connected to the upper side (arrow a direction). The other end of the is integrally connected to the main body 30 at a position separated from the opening 31 by a predetermined distance.

Further, the elastic body portion 37 has a protrusion 38 (hereinafter, also referred to as an “elastic protrusion”) 38 protruding from the outer surface 37a of the elastic body portion 37 toward the front side (direction of arrow e) by a predetermined amount. 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 housed in the stay 12s.

The elastic protrusion 38 has a flat outer surface 38a forming a surface of a portion that protrudes most outward in the radial direction, and a slope formed so that the amount of protrusion gradually decreases from the outer surface 38a toward the upper side (direction of arrow a). It has 38b. The amount of protrusion of the elastic protrusion 38 is such that the outer surface 38a of the elastic protrusion 38 stays 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 in the outer peripheral direction from the engaging hole 12h of 12s (see FIGS. 7A and 7B).

The operation from when the male connector 3 having such a configuration is accommodated in the inner space of the stay 12s until it is attached in a state of being integrated 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 open end 12e (see FIG. 4) of the stay 12s.

At this time, since the slope 38b of the elastic projection 38 of the elastic body portion 37 in the male connector 3 comes into contact with the opening end 12e of the stay 12s, the elastic body portion 37 bends as a whole toward the axis x direction, and then elastic. 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 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. Engaging in 12h, the male connector 3 is housed in the stay 12s and is in a mounting state in which movement is restricted in the longitudinal direction (arrow ab direction).

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

At this time, at the same time, the stay 12s is pushed further as the main body 30 is further pushed in 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 open end 12e of the stay 12s. The ridge portion 34a of the second protrusion 34 is gradually crushed by the inner peripheral surface 12i of the second protrusion 34.

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

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 a male connector 3 and stays 12s is realized.

In a state where the male connector 3 is integrally attached to the stay 12s, the male connector 3 is supported only by the pair of first protrusions 33 and the second protrusion 34 in the main body 30 with respect to the inner peripheral surface 12i of the stay 12s. , The force for bending the elastic body portion 37 by the stay 12s does not act. In this way, creep deformation due to the continuous bending state of the elastic body portion 37 can be prevented, and the engagement state between the elastic protrusion 38 and the engagement hole 12h of the stay 12s can be permanently maintained.

Further, since the R portion 33a formed at the tips 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 contact with the male connector 3 becomes stronger, and the main body 30 of the male connector 3 is firmly held against the inner peripheral surface 12i of the stay 12s.

Further, since the second protrusion 34 is provided with the inclined portion 34b at the upper end (direction of arrow a) of the protrusion portion 34a, the second protrusion 34 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 comes into contact with the opening end 12e of the stay 12s. This can be prevented.

Further, as shown in FIG. 7A, the male connector 3 is supported by a pair of first protrusions 33 and second protrusions with respect to the inner peripheral surface 12i of the stay 12s, and is elastic at that time. The body portion 37 does not elastically deform. Therefore, in a state where the male connector 3 is housed 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. Can be held and engaged. The elastic protrusion 38 does not protrude from the engaging hole 12h in a state where it is engaged with the engaging hole 12h with a constant engaging allowance L.

Further, as shown in FIG. 7B, even if 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, when 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, so that the inner peripheral surface of the holder 5 is elastic. It is also possible to prevent the elastic body portion 37 from being elastically deformed due to contact with the protrusions 38 and being 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 another shape such as a square cylinder shape. The holder 5 accommodates and integrally attaches and holds the female connector 7 described later.

As shown in FIG. 8, the holder 5 includes a holder main body 50 and an elastic lock arm 60 on the holder side integrally formed on the inner peripheral surface of the holder main body 50. Note that FIG. 8 (A) is a vertical sectional view when the holder 5 is cut along the line II-II of FIG. 3, and FIG. 8 (B) shows the holder 5 shown in FIG. 3 on the lower side (direction of arrow b). It is a top view when viewed from the upper side (direction of arrow a).

As shown in FIG. 8B, the holder body 50 has a substantially tubular cross-sectional shape as a whole. The holder body 50 includes a pair of flat portions 50s and a pair of substantially flat plate-shaped portions extending along the axis x direction on the left side (arrow c direction) and the right side (arrow d direction). The flat portion 50s of the above is provided with a pair of curved portions 50c composed of curved portions connecting the front side (arrow e direction) and the back side (arrow f direction), respectively.

Four elastic arms 51 are formed integrally with the curved portion 50c at equal angular intervals on both side 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 protruding outward in the radial direction from the outer peripheral surface of the curved 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 housed in the holder housing member 15, the arm portion 51a of the elastic arm 51 bends and the contact end portion 51b elastically contacts the inner peripheral surface of the holder housing 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 (direction of arrow a) of the holder body 50. The tapered portion 50t functions as a guide portion when the male connector 3 is smoothly inserted from the open edge of the holder 5.

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

Here, the slit 52 includes a thin slit portion 52a on the upper side (direction of arrow a) (hereinafter, this is referred to as a “thin slit portion”) 52a, a thin slit portion 52b on the lower side (direction of arrow b), and a thin slit. It is composed of a thick slit portion (hereinafter, this is referred to as a “thick slit portion”) 52c between the portions 52a and 52b. The thick slit portion 52c is formed so 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.

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

In this case, in the flat portion 50s, 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 make 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 existing between two slits 52 in the flat portion 50s of the holder main body 50, and is an upper end (arrow a direction) and a lower end (arrow b direction) of the flat portion 50s. Is formed integrally with the flat portion 50s.

The elastic lock arm 60 includes a convex lock protrusion 61 that protrudes toward the inside (axis 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 arranged substantially in the center of the flat portion 50s of the holder body 50 in the longitudinal direction (arrow ab direction). The lock protrusion 61 is arranged in the vicinity of the two holder-side contact surfaces 53 and below the holder-side contact surface 53 (in the direction of arrow b).

That is, the holder 5 engages 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 matching lock protrusions 61 are provided at positions close to each other. That is, the holder-side contact surface 53 and the lock protrusion 61 are very close to each other on the upper side (arrow a direction) and lower side (arrow b direction), and on the front side (arrow e direction) and back side (arrow f direction). It is placed in position.

The lock protrusion 61 is formed so as to form a flat protruding surface 61a forming a surface of the most protruding portion inward in the radial direction and a protrusion amount gradually decreasing from the protruding surface 61a toward the lower side (direction of arrow b). It has a slope 61b.

<Female connector integrated with the holder>
As shown in FIGS. 9A and 9B, the female connector 7 includes a main body 71 and a lock arm 73 integrally formed on both left and right sides (arrow c direction and 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 fixedly held.

The main body 71 is made of an insulating synthetic resin, is inserted into the insertion hole 32 of the male connector 3 and fitted, and has an insertion end portion 72 having a predetermined cross-sectional shape, which is the tip portion of the main body 71. ing. As shown in FIG. 9B, the insertion end portion 72 is integrated with the base portion 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 the front side thereof. A convex portion 72b protruding in the (arrow e direction), a large convex portion 72c integrated with the base portion 72a and protruding with a large width toward the back surface side (arrow f direction), and a back surface side integrated with the base portion 72a. It has a narrow convex portion 72d protruding in the (arrow f direction) with a small width. In this case, the large convex portion 72c and the narrow convex portion 72d have a laminated shape in which the small 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 arm 73 is 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 cantilever support structure integrally formed with the main body 71 at the lower end portion on the lower side (direction of arrow b). That is, the upper end portion on the upper side (direction of arrow a) of the lock arm 73 has an elastic structure capable of approaching or separating from the outer peripheral surface of the base portion 72a of the main body 71.

The lock arm 73 has a pair of arm portions 74 extending along the main body 71 from a lower end portion on the lower side (direction of arrow b) toward an upper end portion on the upper side (direction of arrow a), and a pair of arm portions 74 on the upper side. It is provided with an engaging portion 75 which is a portion connected by (arrow a direction). The pair of arm portions 74 in the engaging portion 75 extend in parallel with 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 portion 74 is larger than the width w of the elastic lock arm 60 and the lock protrusion 61 of the holder 5 (see FIG. 8A).

The engaging portion 75 is a portion formed at the upper end (direction of arrow a) of the pair of lock arms 73, and includes an engaging surface 75a, a slope 75b, an upper end surface 75e, a female side contact surface 75c, and It has a slope of 75d. The engaging surface 75a is a flat surface formed inside the upper end (direction of arrow a) of the lock arm 73. The engaging surface 75a is a surface in a direction 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. This is the surface.

The slope 75b is a surface continuous from the engaging surface 75a, and is a tapered surface 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 the engaging surface 75a at the engaging portion 75 and is parallel to the engaging surface 75a. The upper end surface 75e is a surface formed on the outer end portion on the upper side (direction of arrow a) of the engaging portion 75 of the lock arm 73.

The female-side contact surface 75c is formed at the upper end (arrow a direction) front side (arrow e direction) and back side (arrow f direction) end of the engaging portion 75 of the lock arm 73. The female-side contact surface 75c is a surface continuous from the upper end surface 75e, and is 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 tapered surface inclined to.

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

In this way, the engaging portion 75 of the lock arm 73 has an engaging surface 75a that engages with the lock protrusion 61 of the holder 5 and a female-side contact surface 75c that abuts the holder-side contact surface 53 of the holder 5. It is held at positions opposite to each other on the lower side (arrow b direction) and the upper side (arrow a direction) of the engaging portion 75. As described above, the engaging surface 75a and the female side contact surface 75c are formed in a state of being integrated on the front and back sides in one engaging 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 housed 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 of the state in which the female connector 7 is attached to the holder 5 when viewed from the lower side (arrow b direction) which is the insertion direction. 10 (B) is a cross-sectional view taken along the line BB in FIG. 10 (A). 10 (C) is a cross-sectional view taken along the line CC in FIG. 10 (A). FIG. 10 (D) is an enlarged view of the region AR surrounded by the broken line in FIG. 10 (C).

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

After that, when the female connector 7 is further pushed toward the upper side (direction of arrow a), the engaging portion 75 of the lock arm 73 immediately after passing through the protruding surface 61a of the lock protrusion 61, the engaging surface of the engaging portion 75. As the 75a and the lock protrusion 61 engage with each other, the lock protrusion 61 fits between the two arms 74 and is attached to the holder 5 while being integrally held.

When the female connector 7 is integrally housed and attached to the holder 5, as shown in FIGS. 10 (B) and 10 (C), the female side contact surface 75c of the female connector 7 is a holder of the holder 5. It comes into contact with the side contact surface 53. As a result, the movement of the holder 5 in the longitudinal direction (arrow ab direction) of the female connector 7 is restricted.

At this time, the engagement 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 of the holder 5 with the holder-side contact surface 53 exists in the vicinity of one engaging portion 75, the holder 5 and the holder 5 caused by a dimensional error when the female connector 7 is integrally attached to the holder 5. The rattling between the female connector 7 and the female connector 7 can be significantly 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 are engaged with each other, and the female side contact surface 75c of the lock arm 73 of the female connector 7 and the holder. Since the contact portion of 5 with the holder-side contact surface 53 exists in the vicinity of one engaging portion 75 of the female connector 7, it is not necessary to separately provide the contact portion at a position away from the engaging portion.

As a result, the accommodation space on the front side (arrow e direction) and the back side (arrow f direction) between the holder 5 and the female connector 7 is secured wider than before, and the holder 5 and the female connector are secured. A high degree of design freedom can be provided between the 7 and 7.

In a state where the female side contact surface 75c of the lock arm 73 is in contact with the holder side contact surface 53 of the holder 5, the surface of the holder 5 opposite to the slope 61b of the lock protrusion 61 and the lock arm 73. It is set so that a gap g of a certain value or more always exists between the engagement surface 75a and the engagement surface 75a (see FIG. 10 (D)). Therefore, even if a dimensional error occurs in the lock arm 73 of the female connector 7 and the lock protrusion 61 of the holder 5, there is always a gap g, so that the engaging portion 75 of the lock arm 73 and the holder 5 are locked. It is possible to secure the engagement state with the protrusion 61.

When the male connector 3 integrated with the stay 12s is inserted into the holder 5 to which the female connector 7 is integrally attached, the engaging protrusion 35 of the male connector 3 becomes 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 terminally connected to each other. In this state, the engaging portion 75 of the female connector 7 is inserted into the recess between the engaging projection 35 and the abutting projection 36 of the male connector 3, so that the male connector 3 and the female connector 7 are held together. (See FIG. 11).

After that, 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. The operation of disengaging the holder 5 and the female connector 7 will be described below.

From the state where the male connector 3 integrated with the stay 12s and the female connector 7 integrated with the holder 5 are fitted and terminally connected to each other, the male connector 3 is on the lower side (arrow) together with the stay 12s of the headrest 12. When pushed further in the b direction), the slope 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 elastically deforms outward in the radial direction of the holder 5. In this case, the engaging protrusion 35 of the male connector 3 is in a state of trying 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 protrusion 61 of the holder 5 rides on the slope 75b of the lock arm 73 of the female connector 7, and the holder 5 engages with the female connector 7. The state is released. Since the male connector 3 and the female connector 7 are engaged, that is, the male connector 3 and the female connector 7 are integrated, and the female connector 7 is released from the holder 5, the male connector is released. The 3 and the female connector 7 are free in the longitudinal direction (arrow ab direction).

<Rotation-induced 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 integrally with the stay 12s of the headrest 12 (not shown). The fixed male connector 3 and the female connector 7 integrally attached to the holder 5 (not shown) of the seat back unit 14 are in a predetermined facing position in the vertical and horizontal directions (hereinafter, this is referred to as "facing". Ideally, it is placed in the "position". In FIG. 11, the holder 5 is 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 arranged in the facing positions, and the female connector 7 is on the left side (arrow) from the facing position about the axis x. It may be placed in a non-facing position where the rotation angle shifts to the right (direction c) or to the right (direction arrow d).

Therefore, the male connector 3 absorbs such a rotation angle deviation between the male connector 3 and the female connector 7, and inserts a rotation-inducing structure 40 for arranging the male connector 3 and the female connector 7 so as to correct them in the facing positions. Be prepared for.

Here, the rotation-induced structure 40 means that when the male connector 3 is pushed down toward the female connector 7, the insertion end portion 72 of the female connector 7 is inserted into the insertion hole 32 of the male connector 3, but at that time, both are inserted. It is a structure that induces rotation of the female connector 7 so as to be arranged at the facing position. Although the female connector 7 is integrally attached to the holder 5, the holder 5 is oriented in both the left side (arrow c direction) and the right side (arrow d direction) about the axis x in the holder accommodating member 15. It is attached so that it can rotate by a predetermined angle (for example, 20 degrees each).

The rotation-induced structure 40 of the male connector 3 is composed of an opening edge 41 and a plurality of inner peripheral surfaces 42, as shown in FIGS. 12A and 12B. The opening edge 41 is a portion where the insertion end portion 72 of the female connector 7 serves as a frontage when inserting into the insertion hole 32 of the male connector 3. The inner peripheral surface 42 is an inclined surface 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 at positions facing each other. Here, the inner peripheral surface 42 is composed of a plurality of surfaces having the same or different shapes and sizes from each other.

The opening edge 41 of the rotation-induced structure 40 has a female insertion hole 32 even when the insertion end 72 of the female connector 7 is displaced from the facing position by a predetermined rotation angle with respect to the insertion hole 32 of the male connector 3. It has a shape in which the insertion end 72 of the connector 7 can be inserted.

Specifically, the opening edge 41 is centered on the axis x of the female connector 7 integrated with the holder 5 (corresponding to the axis x of the male connector 3) on the left side (arrow c direction) and the right side (arrow d direction). ), It has a shape corresponding to the rotation locus of each top of the base portion 72a to the narrow convex portion 72d of the insertion end portion 72 when rotated by a predetermined angle (for example, 20 degrees each). In this case, since it is the rotation locus of each top when rotating about the axis x, the opening edge 41 is formed by a plurality of arc shapes.

The inner peripheral surface 42 of the rotation-induced structure 40 is formed until the insertion end 72 of the female connector 7 is inserted into the insertion hole 32 of the male connector 3 until the insertion end 72 is inserted from the opening edge 41 to a predetermined distance. In addition, the slope is inclined at an angle so as to gradually (linearly) rotate the insertion end 72 of the female connector 7 toward the facing position.

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

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

However, if the predetermined distance is too short than 5 mm, the rotation-induced structure 40 rotates the female connector 7 at a sharp angle, which puts a large load on 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 arranged in the facing position with respect to the insertion hole 32 of the male connector 3, and the rotation angle deviation between the two cannot be eliminated. become. Therefore, the predetermined distance is preferably 4 mm to 6 mm from the opening edge 41, and particularly preferably 5 mm.

In this way, in the rotation-induced structure 40, when the insertion end portion 72 of the female connector 7 is inserted from the opening edge 41 to a depth of 5 mm, the female connector 7 is rotated by the plurality of inner peripheral surfaces 42, and the female connector 7 is rotated. It has a structure capable of correcting the insertion hole 32 of 3 and the insertion end 72 of the female connector 7 to the opposite positions.

The process of forming the opening edge 41 and the inner peripheral surface 42 in the rotation-induced structure 40 of the male connector 3 will be described below. As shown in FIGS. 13 (A) and 13 (A'), the insertion end portion 72 of the female connector 7 is inserted in a state where the insertion end portion 72 of the female connector 7 is arranged in a facing position with respect to the insertion hole 32 of the male connector 3. The basic shape is a rectangular cross section having a plurality of tops in the cross section in the direction 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 narrow convex portion 72d are focused on. The center of rotation of the insertion end 72 is set as the point O.

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

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

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

Then, as shown in FIG. 13 (B'), the tops B1 to B10 and the virtual tops A'1 to A'10 are connected according to the same numbers. 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, ..., 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 from the facing position (FIGS. 13A and 13A') about the axis x. At this time, the tops A1 to A10 change to the tops C1 to C10 based on the locus of the insertion end 72 rotated 20 degrees to the right.

Then, as shown in FIG. 13 (C'), the tops C1 to C10 and the virtual tops A'1 to A'10 are connected according to the same numbers. 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, ..., The top C10 and the virtual top A'10 are connected by a straight line. ..

As a result, as shown in FIG. 14, the tops B1 to B10 and the virtual tops A'1 to A'10 are connected according to the same numbers as each other, and the tops C1 to C10 and the virtual tops A'1 to A'10 are connected. A virtual model VM1 is generated in which are connected according to the same numbers as each other.

In this virtual model VM1, as shown in FIG. 15A, tops A1 to A10, tops B1 to B10, and tops C1 to C10 are connected according to the same numbers. In this case, the top A1, the top B1, and the top C1 are connected by an arc-shaped curve R1, the top A2, the top B2, and the top C2 are connected by the arc-shaped curve R2, ..., The top A10, the top B10, and the top C10 are circular. Connect with an arc-shaped curve R10.

After that, the curves R1 to R10 and the virtual tops A'1 to A'10 are connected according to the same numbers as each other, and a plurality of outer peripheral surfaces G42 composed of the connected substantially triangular regions are formed to form the virtual model VM2. Can be generated. Here, as shown in FIG. 15B, for example, the substantially triangular region connecting the top A9, the top B9, and the top C9 and the virtual top A'9 is the outer peripheral surface G42. .. The outer peripheral surface G42 is formed on a curved surface inclined according to the 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 the case of, the length of the line segment A9-A'9 is a predetermined distance L = 5 mm. Of the line segments A9-A'9, the position advanced by 1 mm from the top A9 toward the virtual top A'9 is defined as the point X.

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

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

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

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

When the male connector 3 having such a rotation-induced structure 40 is pushed down toward the female connector 7 integrated with the holder 5 in a state of being integrated with the stay 12s of the headrest 12, the opening of the rotation-induced structure 40 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-induced structure 40 of the male connector 3, and the female connector 7 is inserted together with the holder 5 by the plurality of inner peripheral surfaces 42. It will be rotated clockwise or counterclockwise within a range of up to 20 degrees, and will be placed in the opposite position.

Therefore, since the insertion hole 32 of the male connector 3 and the insertion end portion 72 of the female connector 7 are arranged at opposite positions, the insertion end portion 72 of the female connector 7 is finally placed with respect to the inner wall of the male connector 3. It is possible to realize a connector connection structure in which the above are 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 rotation angle deviation between the male connector 3 and the female connector 7 is corrected and the female connector 7 is fitted to each other. It is possible to realize a connector connection structure 2 that can be fixed.

<Other embodiments>
In the above-described embodiment, the case where the holder 5 integrated with the female connector 7 is rotatably attached in the holder accommodating member 15 has been described, but the present invention is not limited to this. 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 does not need to be rotatably mounted in the holder housing member 15.

Further, in the above-described embodiment, a virtual configuration including an opening edge 41 and an outer peripheral surface G42 along a locus by rotating the insertion end 72 of the female connector 7 from the facing position to the left and right sides about the axis x. The case where the rotation-induced 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, but the present invention is not limited to this, and the insertion end portion 72 is not limited to this. The rotation-induced structure 40 is formed based on the virtual model VM2 composed of the opening edge 41 and the outer peripheral surface G42 along the locus by rotating only one of the left side and the right side about the axis x from the facing position. You may do so.

Further, although the preferred embodiment as described above has been described, 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 claims. Includes all aspects. In addition, each configuration may be selectively combined as appropriate so as to achieve at least a part of the above-mentioned problems and effects. For example, the shape, material, arrangement, size, etc. of each component in the above embodiment can be appropriately changed depending on 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 Opening end 12s Stay (containment body)
12h Engagement hole 12i Inner peripheral surface 13 Guide member 13h Through hole 14 Seat back unit 15 Holder accommodating member 30 Main body 30k Top wall 31 Opening 32 Insertion hole 33 First protrusion 34 Second protrusion 35 Engagement protrusion ( Protrusion)
35a Outer surface 35b Slope 36 Abutment protrusion 36a Outer surface 36b Slope 37 Elastic body 37a Outer surface 38b Slope 38 Elastic protrusion 38a Outer surface 40 Rotation-induced structure 41 Opening edge 42 Inner peripheral surface 50 Holder body 51 Elastic arm 52 Slit 53 Holder side contact Contact surface (contact part)
60 Elastic lock arm 61 Lock protrusion (lock protrusion)
61a Protruding surface 61b Slope 71 Main body 72 Insertion end 72a Base 72b Convex 72c Large convex 72d Narrow convex 73 Lock arm 74 Arm 75 Engagement 75a Engagement surface 75b Slope 75c Female side contact surface 75d Slope 75e Upper side End faces A1 to A10, B1 to B10, C1 to C10 Top A'1 to A'10 Virtual top L Predetermined distance VM1, VM2 Virtual model R1 to R10 Curve G42 Outer surface

Claims (9)

A connector with a tubular body and
An accommodating body accommodating the connector and
With
The main body
A pair of first protrusions protruding so as to abut on the inner peripheral surface of the housing on the outer peripheral surface of the main body,
At least one second protrusion projecting so as to abut the inner peripheral surface of the housing body on the portion of the outer peripheral surface facing the pair of first protrusions.
Have a,
An elastic body portion that bends in the radial direction of the main body portion and engages with the housing body is provided on the outer peripheral surface of the main body portion.
The first protrusions are provided on both sides of the elastic body portion along the longitudinal direction of the main body portion.
The main body is supported by the pair of first protrusions and at least one second protrusion with respect to the inner peripheral surface of the housing, and is housed in the housing and engaged with the housing. In the state, the connector connection structure is characterized in that the force for bending the elastic body portion by the accommodating body does not act on the elastic body portion . The elastic body portion has protrusions protruding toward the outer peripheral side in the radial direction.
The connector connection structure according to claim 1 , wherein the protrusion is engaged with an engaging hole of the housing in a state where the connector is housed in the housing. The second protrusion is
The first or second aspect of the present invention, wherein the connector is held by the housing by extending along the longitudinal direction of the main body and collapsing while the connector is housed in the housing. Connector connection structure. The connector connection structure according to any one of claims 1 to 3, wherein the contact surface of the first protrusion that contacts the inner peripheral surface of the housing has an R shape. .. A connector having a tubular body that is inserted into the housing.
The main body
On the outer peripheral surface of the main body, a pair of first protrusions protruding so as to abut on the inner peripheral surface of the housing,
At least one second protrusion projecting so as to abut the inner peripheral surface of the housing body on the portion of the outer peripheral surface facing the pair of first protrusions.
Have a,
An elastic body portion that bends in the radial direction of the main body portion is provided on the outer peripheral surface of the main body portion.
The first protrusions are provided on both sides of the elastic body portion along the longitudinal direction of the main body portion.
In a state in which the connector is housed in the housing, is supported by the pair of first protrusions and at least one second protrusion with respect to the inner peripheral surface of the housing, and engages with the housing. A connector characterized in that the force of bending the elastic body portion by the accommodating body does not act on the elastic body portion . An elastic body portion that bends in the radial direction of the main body portion is provided on the outer peripheral surface of the main body portion.
The connector according to claim 5 , wherein the first protrusions are provided on both sides of the elastic body portion along the longitudinal direction of the main body portion. The elastic body portion has protrusions protruding toward the outer peripheral side in the radial direction.
The connector according to claim 6 , wherein the protrusion is engaged with an engaging hole of the housing in a state where the connector is housed in the housing. The second protrusion is
The present invention according to any one of claims 5 to 7 , wherein the tip side of the second protrusion in the insertion direction into the housing has a portion in which the wall thickness of the second protrusion decreases along the insertion direction. Described connector. A connector with a tubular body that is housed in the body,
An insertion side connector that is inserted into and fitted into the connector,
A holder that integrally holds the insertion side connector,
With
The main body
On the outer peripheral surface of the main body, a pair of first protrusions protruding so as to abut on the inner peripheral surface of the housing,
A portion of the outer peripheral surface facing the pair of first protrusions, and at least one second protrusion protruding so as to abut the inner peripheral surface of the housing.
Have a,
An elastic body portion that bends in the radial direction of the main body portion is provided on the outer peripheral surface of the main body portion.
The first protrusions are provided on both sides of the elastic body portion along the longitudinal direction of the main body portion.
In a state in which the connector is housed in the housing, is supported by the pair of first protrusions and at least one second protrusion with respect to the inner peripheral surface of the housing, and engages with the housing. A connector connection structure characterized in that the force of bending the elastic body portion by the accommodating body does not act on the elastic body portion .

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