JP2007210394A - Wiring coupling structure to headrest of vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simplified wiring coupling structure to a headrest which allows releasing the held condition of a connector held in standby on the seat back side after the connectors are coupled together through the inserting operation of a headrest stay. <P>SOLUTION: The structure is to couple the wiring Wb with another Wh, and includes a first connector 30 coupled with the wiring Wh and a second connector 40 coupled with the wiring Wb. The first connector 30 is secured to the forefront in the inserting direction S in the stay 21, while the second connector 40 is fastened to a holding member 50 through hitching of a pawl. When the first connector 30 is inserted to the second 40 by inserting the stay 21, the two connectors are fastened owing to hitching of the pawl to generate a coupled condition. The engaging force of the pawl is stronger than the engaging force of the second connector 40 with the pawl of the holding member 50. When the stay 21 is drawn off in the condition that the two connectors are coupled, the coupled condition of the second connector 40 with the holding member 50 is disengaged while the connectors remain in the coupled condition. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wiring connection structure to a headrest of a vehicle seat. More specifically, the present invention relates to a wiring connection structure to a headrest of a vehicle seat that connects wiring coming from the vehicle body side routed inside the seat back of the vehicle seat to wiring on the headrest side routed inside the headrest.

Conventionally, some vehicle seat headrests are assembled with electrical components such as a television monitor and a speaker. These electrical components are energized by being connected to wiring drawn into the headrest from the inside of the seat back. Here, an example of a wiring connection structure to the headrest is disclosed in Patent Document 1. In this disclosure, the first connector serving as a connection terminal for wiring connected to the electrical components wired on the headrest side is a second connector serving as a connection terminal for wiring coming from the vehicle body side wired on the seat back side; It has a connected structure.
Specifically, the first connector is provided to be connected to the inside of the headrest stay. This headrest stay is for attaching and fixing the headrest to the seat back. The headrest stay is formed so as to penetrate the inside of the cylinder, and holds the first connector through the cylinder tip (lower end opening). ing. On the other hand, the second connector is held inside a headrest support for inserting and holding the headrest stay. Specifically, the second connector is held by a holder fixed inside the insertion port of the headrest support. Accordingly, the second connector is held in a standby state so as to be connected to the first connector held at the end of the cylinder as the headrest stay is inserted.
Here, after the second connector is connected to the first connector by the insertion operation of the headrest stay, the second connector is pressed by the insertion force to be disengaged from the holder. Thereby, even after the 1st connector and the 2nd connector are connected, the insertion operation of a headrest stay can be permitted, and the attachment fixation to the seat back of a headrest can also be performed favorably.

JP 2002-184523 A

  However, in the conventional technique disclosed in Patent Document 1, the connection structure of each connector is complicated in order to simultaneously achieve the connection of each connector and the subsequent movement of the headrest stay. It was.

  The present invention was devised as a solution to the above-described problems, and the problem to be solved by the present invention is that the seat back side is held on standby after the connectors are connected by inserting the headrest stay. It is to simplify the wiring connection structure to the headrest that releases the held state of the connector.

In order to solve the above problems, the wiring connection structure to the headrest of the vehicle seat of the present invention takes the following means.
First, according to the first aspect of the present invention, the wiring coming from the vehicle body side routed inside the seat back of the vehicle seat is connected to the headrest side wiring routed inside the headrest to the headrest of the vehicle seat. A first connector that is a connection terminal connected to the wiring on the headrest side, and a second connector that is a connection terminal that is connected to the wiring coming from the vehicle body side and can be connected to the first connector. The headrest is attached and fixed to the seatback by inserting a rod-like headrest stay provided integrally with the headrest from an insertion port provided on the upper surface of the seatback. The first connector is formed to have a size equal to or smaller than the outer diameter of the headrest stay, and is fixed to the distal end portion in the insertion direction in the headrest stay. The second connector is always locked by the hook of the claw to the holding member assembled integrally with the seat back before being connected to the first connector. It is held in a connected state in which movement in the insertion direction is restricted at a position on the extension line of the mouth, and the first connector is inserted by inserting the headrest stay to the end position where the headrest stay can be inserted. The first connector is inserted into the second connector and is held in a state where the first connector is locked and connected to the second connector by hooking the claws. The first connector and the second connector The engaging force of the claw that holds the connected state is set to be stronger than the engaging force of the claw that holds the connected state between the second connector and the holding member, and the first connector and the second connector are inserted and connected. State By adjusting the amount of insertion by moving the headrest stay in the pulling direction, the connection state between the second connector and the holding member is released while the connection state between the first connector and the second connector is maintained. It is characterized by that.
According to the first aspect of the present invention, the engagement force between the first connector and the second connector inserted and connected to each other is such that the load in the pulling direction in which the headrest stay is pulled out from this state is It works stronger than the engaging force with the holding member. Therefore, the movement of the headrest stay in the pulling direction removes the connection state between the second connector and the holding member while maintaining the connection state between the two connectors. Accordingly, it is possible to move the headrest stay in the pulling direction while maintaining the connected state of both connectors.

Next, according to a second aspect of the present invention, in the first aspect described above, the holding member that holds the second connector has a restriction protrusion that abuts against the bottom surface of the second connector and restricts movement in the insertion direction. It is formed.
According to the second aspect of the invention, the second connector is held in a state in which movement in the insertion direction with respect to the holding member is restricted by the restriction protrusion.

Next, according to a third invention, in the first or second invention described above, the first connector is formed in a cylindrical shape that can be inserted into the rod-shaped inside of the headrest stay, and the second connector is a cylinder of the first connector. A plurality of first engagements that are formed in a columnar shape that can be inserted into the shape, and that protrude outwardly in the radial direction from the cylindrical wall and that can be bent and deformed in the radial direction on the cylindrical wall of the second connector A claw and a plurality of second engagement claws are formed, and the first engagement claw is a first recess that is recessed in the radial direction formed in the holding member by inserting the second connector into the holding member. The second engagement claw is elastically hooked and locked to the claw-hanging portion, and the second connector is inserted into the cylindrical shape of the first connector, so that the second engagement claw is placed inside the cylindrical wall of the first connector. It is characterized in that it is elastically hooked and locked to the formed hollow-shaped second claw hook.
According to the third aspect of the invention, by inserting the second connector into the holding member, the first engagement claw is elastically engaged with the first claw hook portion. Thereby, the second connector is held in a state of being locked to the holding member. Further, by inserting the first connector into the second connector, the second engagement claw is elastically hooked to the second claw hook portion at the insertion position where both the connecting terminals are connected. As a result, the second connector is held in a state of being locked to the first connector.

Next, in a fourth aspect based on the third aspect described above, the first engagement claw formed on the cylindrical wall of the second connector is formed to have a smaller claw shape than the second engagement claw. Thus, the engaging force is set to be weaker than that of the second engaging claw.
According to the fourth aspect of the present invention, since the first engaging claw has a smaller claw shape than the second engaging claw, the first engaging claw is more likely to bend and deform in the radial direction than the second engaging claw. The connected state is easily released.

Next, a fifth invention is the above-described third or fourth invention, wherein the first engagement claw formed on the cylindrical wall of the second connector is removed from the connection state of the second connector with the holding member. The part surface that comes into contact with and is pressed against the first claw hooking portion of the holding member is formed as an inclined surface that tapers the first engaging claw in the pulling direction, and the gradient of the inclined surface Thus, the engaging force is set to be weaker than that of the second engaging claw.
According to the fifth aspect of the invention, the first engaging claw is formed in a shape that tapers in the pulling direction, and the tapered gradient causes the first engaging claw to bend and deform in the radial direction more than the second engaging claw. It becomes easy and a connection state with a holding member becomes easy to remove | deviate.

The present invention can obtain the following effects by taking the above-described means.
First, according to 1st invention, the structure which cancels | releases the holding | maintenance state to the holding member of a 2nd connector, after connecting connectors by the simple structure which only sets strength to the engaging force of two types of nail | claws. Can be achieved.
Further, according to the second invention, since the restricting projection is formed, the holding state of the second connector when the first connector is inserted and connected to the second connector can be stabilized.
Furthermore, according to the third invention, it is possible to realize a configuration in which each claw elastically engages the holding member and the first connector.
Furthermore, according to the fourth invention, the above-described invention can be achieved with a simple configuration in which the sizes of the two kinds of nails are changed.
Furthermore, according to the fifth invention, the above invention can be achieved by a simple configuration in which the engaging surface of the claw is simply set as an inclined surface.

  Embodiments of the best mode for carrying out the present invention will be described below with reference to the drawings.

First, the wiring connection structure to the headrest 20 of the vehicle seat 1 of the first embodiment will be described with reference to FIGS. FIG. 1 is a perspective view showing an outline of a wiring connection structure to the headrest 20 of the vehicle seat 1. FIG. 2 is a cross-sectional view of a main part showing a state before the first connector 30 is inserted and connected to the second connector 40. FIG. 3 is a cross-sectional view of a main part showing a state in which the first connector 30 is inserted and connected to the second connector 40. FIG. 4 is a cross-sectional view of the main part showing a state where the connection state between the second connector 40 and the holding member 50 is removed. FIG. 5 is a perspective view showing an overview of the first connector 30. FIG. 6 is a perspective view showing an overview of the second connector 40. FIG. 7 is a bottom view of the first connector 30. FIG. 8 is a plan view of the second connector 40.
Hereinafter, the wiring connection structure to the headrest 20 of the vehicle seat 1 will be described simply as a wiring connection structure.

As shown in FIG. 1, the wiring connection structure of the present embodiment includes the wiring Wb routed inside the seat back 10 of the vehicle seat 1, the wiring Wh routed inside the headrest 20, Are connected so that energization is possible.
Here, the upper end of the wiring Wh routed inside the headrest 20 is connected to an electrical component (not shown) such as a speaker assembled to the headrest 20. Yes. In addition, a first connector 30 serving as a connection terminal for the wiring Wh is connected to the lower end portion shown in the figure.
On the other hand, the wiring Wb routed inside the seat back 10 is configured such that a lower end portion (not shown) is connected to a power source on the vehicle body side. Further, a second connector 40 serving as a connection terminal for the wiring Wb is connected to the upper end portion shown in the figure.
The first connector 30 and the second connector 40 are connected to each other by being inserted into each other, and the wirings Wb and Wh can be connected to each other so as to be energized. Then, once the first connector 30 and the second connector 40 are inserted and connected, the first connector 30 and the second connector 40 are elastically hooked to each other, and the connected state is maintained in the free state. Thereby, the wiring Wb on the seat back 10 side and the wiring Wh on the headrest 20 side can be held in a state where they are connected so as to be energized.

Here, the first connector 30 is a lower end (tip) of a stay 21 on one side of metal rod-like headrest stays 21 and 22 (hereinafter referred to as stays 21 and 22) integrally provided at a lower portion of the headrest 20. Installed on the part. These stays 21 and 22 are inserted from insertion ports 11a and 12a of cylindrical headrest supports 11 and 12 (hereinafter referred to as supports 11 and 12) provided on the upper surface of the seat back 10, respectively. It has become. The headrest 20 can be fixed in an attached state on the upper portion of the seat back 10 by inserting the stays 21 and 22. Moreover, the first connector 30 attached to the lower end portion of the one side stay 21 is inserted into the insertion port 11a by the insertion of the stays 21 and 22.
On the other hand, the position of the second connector 40 is fixed and held by a holding member 50 assembled in the seat back 10. The holding member 50 is disposed below the support 11 and holds the second connector 40 at a position on the extension line of the insertion port 11a. Therefore, by inserting the stay 21 from the insertion port 11a, the first connector 30 can be inserted and connected to the second connector 40 that is waiting ahead.
Hereafter, each said structural member is demonstrated in detail.

First, the stays 21 and 22 will be described.
That is, as well shown in FIG. 1, the stay 21 on the side to which the first connector 30 is attached is formed with a through-line 21b through which the wiring Wh can be passed through the rod-like interior. . Further, as well shown in FIG. 2, locking grooves 21 c for locking locking claws 31 of the first connector 30 described later are respectively formed in the inner peripheral wall 21 a of the stay 21 in the radially outward direction. Is formed. These locking grooves 21 c are formed at axially symmetrical positions of the stay 21.
Further, as well shown in FIG. 1, the stay 22 on the other side is formed with a plurality of lock grooves 22b that are recessed inward in the radial direction along the length direction of the outer peripheral wall 22a. These lock grooves 22b are configured to mesh and lock with lock claws 12b provided in the mouth of the insertion port 12a of the support 12 so as to be movable in and out. Here, the lock claw 12b is normally urged in the operating direction protruding into the insertion port 12a. Therefore, the lock claw 12b is engaged with the lock 22 when the stay 22 is inserted into the insertion port 12a and the height position of one of the lock grooves 22b matches. Thereby, the movement of the stay 22 in the insertion direction S can be restricted, and the headrest 20 can be held in a state of being attached and fixed to the seat back 10. Note that the lock claw 12b is retracted from the insertion port 12a against the above-mentioned urging by performing a pushing operation of an adjustment knob 12c provided integrally therewith. As a result, the lock claw 12b can be switched to a state in which the lock claw 12b is not meshed with the lock groove 22b.

Next, the first connector 30 will be described.
Here, the external shape of the first connector 30 is well shown in FIG. The shape of the first connector 30 viewed from the bottom side is well shown in FIG. As can be seen from these drawings, the entire first connector 30 is formed in a substantially cylindrical shape. The first connector 30 is formed as an integrally molded product of synthetic resin. Specifically, as shown in FIG. 2, the cylindrical shape of the first connector 30 is fitted into the through-line 21 b formed in the stay 21 with a slight gap (not shown) in the radial direction. It is formed in size.
A locking claw 31 is formed on the cylindrical wall 30 a of the first connector 30. The locking claw 31 is formed at a position near the upper end of the cylindrical wall 30a, and is formed at two axially symmetrical positions of the cylindrical wall 30a. Specifically, each locking claw 31 is formed in a shape protruding radially outward from the cylindrical wall 30a, and is formed to be able to bend and deform in the radial direction. These locking claws 31 are formed so as to protrude in the radial direction from the diameter of the communication line 21 b of the stay 21. Therefore, each locking claw 31 is engaged with each engagement of the stay 21 by inserting the first connector 30 into the through line 21 b of the stay 21 with each locking claw 31 being squeezed inward in the radial direction. It elastically restores at a position where the stop groove 21c is present, and is expanded and displaced, and is hooked on these. Accordingly, the first connector 30 is held in a state of being fixed to the tip portion in the insertion direction S in the stay 21. Further, as shown well in FIG. 5, on the outer peripheral surface of each locking claw 31, a tapered surface 31 a having a shape that tapers the locking claw 31 toward the insertion direction S, and in the drawing direction H And a tapered surface 31b having a tapered shape. As can be seen with reference to FIG. 2, these tapered surfaces 31 a and 31 b are used when the first connector 30 is inserted into the through line 21 b of the stay 21 or when the first connector 30 is pulled out from the locking groove 21 c. As a bearing surface that transmits each locking claw 31 as a pressing force that bends (squeezes) each inward in the radial direction. Thereby, the insertion / extraction operation with respect to the stay 21 of the 1st connector 30 can be performed smoothly.

Further, as well shown in FIG. 5, a second hook portion 32 is formed on the cylindrical wall 30 a of the first connector 30. This 2nd nail | claw hook part 32 is formed in the site | part near the lower end of the cylinder wall 30a, and is each formed in two places of the axial-symmetrical position of the cylinder wall 30a. In detail, the 2nd nail | claw hook part 32 is formed as a square opening shape penetrated to the radial direction of the cylinder wall 30a. As shown in FIG. 3, the second claw hook 32 functions as a hook for hooking a second engagement claw 42 of a second connector 40, which will be described later, onto a rectangular edge surface.
Also, as shown well in FIG. 2, the upper wall 30b of the first connector 30 is provided with two convex terminals 33 serving as connection terminals for electrically connecting the wires Wb and Wh. Yes. The two convex terminals 33 are fixed to the upper wall 30b while being electrically connected to the wiring Wh. Specifically, each convex-side terminal 33 is provided to extend in the insertion direction S from the upper wall 30 b in the cylindrical shape of the first connector 30.

Next, the second connector 40 will be described.
Here, the external shape of the second connector 40 is well shown in FIG. Further, the shape of the second connector 40 viewed from the upper surface side is well shown in FIG. As can be seen from these drawings, the entire second connector 40 is formed in a substantially cylindrical shape. Similar to the first connector 30, the second connector 40 is formed as an integrally molded product of synthetic resin. Specifically, as shown in FIG. 3, the cylindrical shape of the second connector 40 has a cylindrical shape of the first connector 30 and a slight gap in the radial direction inside the first peripheral wall 51 of the holding member 50 described later (illustrated). It is formed in a size that fits with (omitted).
As well shown in FIG. 6, a first engagement claw 41 is formed on the peripheral wall 40 a of the second connector 40. The first engaging claws 41 are formed at portions near the lower end of the peripheral wall 40a, and are respectively formed at two axially symmetric positions of the peripheral wall 40a. Specifically, each of the first engaging claws 41 is formed in a shape protruding radially outward from the peripheral wall 40a, and is formed so as to be able to bend and deform in the radial direction. These first engaging claws 41 are formed so as to protrude in the radial direction from the inner diameter of the first peripheral wall 51 of the holding member 50 as well shown in FIG. Here, in the first peripheral wall 51, first claw hook portions 51 a for locking the first engagement claws 41 are formed as opening shapes penetrating in the radial direction of the first peripheral wall 51. Therefore, by inserting the second connector 40 into the space surrounded by the first peripheral wall 51 in a state in which each first engagement claw 41 is narrowed inward in the radial direction, each first engagement claw 41 is elastically restored and expanded and displaced at a position of each first claw hook 51a of the first peripheral wall 51, and is hooked to these. Thereby, the 2nd connector 40 is hold | maintained as the state fixed to the holding member 50. FIG.
Further, as shown well in FIG. 6, on the outer peripheral surface of each first engagement claw 41, a tapered surface 41 a having a shape in which the first engagement claw 41 is inclined in the insertion direction S, and And a tapered surface 41b having a shape that is tapered toward the drawing direction H. Here, the tapered surface 41b corresponds to the inclined surface of the present invention. As can be seen with reference to FIG. 2, these tapered surfaces 41a and 41b are used when the second connector 40 is inserted into the space surrounded by the first peripheral wall 51 or when the second connector 40 is pulled out from the first claw hook 51a. It functions as a bearing surface that transmits the pulling force as a pressing force that bends (squeezes) each first engaging claw 41 inward in the radial direction. Thereby, the insertion / extraction operation with respect to the holding member 50 of the 2nd connector 40 can be performed smoothly.

Furthermore, as well shown in FIG. 6, a second engagement claw 42 is formed on the peripheral wall 40 a of the second connector 40. The second engaging claws 42 are formed at a position near the upper end of the peripheral wall 40a, and are formed in two axially symmetric positions of the peripheral wall 40a side by side with the first engaging claws 41 in the axial direction. .
Specifically, each of the second engaging claws 42 is formed in a shape protruding outward in the radial direction from the peripheral wall 40a, and is formed so as to be able to bend and deform in the radial direction. These second engagement claws 42 are formed in a larger claw shape than the first engagement claws 41. And the 2nd engagement nail | claw 42 is extended and formed in the radial direction rather than the cylindrical internal diameter of the 1st connector 30, as FIG. 3 shows well. Therefore, by inserting the columnar shape of the second connector 40 into the cylindrical shape of the first connector 30 in a state where the second engaging claws 42 are narrowed inward in the radial direction, The engaging claws 42 are elastically restored and expanded and displaced at positions where the respective second claw hook portions 32 of the first connector 30 are located, and are hooked on these. Thereby, the 2nd connector 40 is hold | maintained as the state inserted and connected with the 1st connector 30. FIG.
Further, as well shown in FIG. 6, on the outer peripheral surface of each second engagement claw 42, a tapered surface 42 a having a shape in which the second engagement claw 42 is inclined in the insertion direction S, and A tapered surface 42b having a shape that is tapered toward the drawing direction H is formed. As can be seen with reference to FIG. 3, these taper surfaces 42 a and 42 b are used when the second connector 40 is inserted into the first connector 30 or pulled out from the second claw hook portion 32. As a bearing surface that transmits each second engaging claw 42 as a pressing force that bends (squeezes) inward in the radial direction. Thus, the insertion / removal operation of the second connector 40 with respect to the first connector 30 can be performed smoothly.
2, the wiring Wb and Wh can be electrically connected to each other by inserting the convex terminal 33 of the first connector 30 into the upper wall 40b of the second connector 40. A concave terminal 43 is provided as a connection terminal. The concave terminal 43 is formed in a shape that is recessed in the insertion direction S from the upper wall 40b. By inserting the first connector 30 into the second connector 40, the convex terminals 33 are simultaneously brought into the interior thereof. It can be inserted.

Here, as described above, the claw shape of the second engagement claw 42 is formed larger than the claw shape of the first engagement claw 41. Therefore, the engaging force between the second connector 40 and the first connector 30 is stronger than the engaging force between the second connector 40 and the holding member 50. Therefore, as can be seen with reference to FIG. 3, when a load that moves the stay 21 in the pulling-out direction H is applied in a state where the first connector 30 and the second connector 40 are inserted and connected, The connection state between the second connector 40 and the holding member 50 is removed while the connection state with the two connector 40 is maintained. Thereby, it is possible to move the stay 21 in the pulling direction H while maintaining the connected state of the first connector 30.
Note that the engagement force of the locking claw 31 that locks the first connector 30 to the stay 21 works stronger than the engagement force of the first engagement claw 41 and the second engagement claw 42. . That is, the latching claw 31 is hooked on the metal rigid stay 21, and the engaging force is stronger than when the resins are hooked together. As well shown in FIG. 3, in a state where the first connector 30 and the second connector 40 are inserted and connected, the engagement of the second connector 40 causes the locking claw 31 to be radially inward. This is because bending deformation is restricted.

Next, the holding member 50 will be described.
That is, the holding member 50 is formed of a metal plate-like member as well shown in FIG. The holding member 50 is fixed together with the support 11 to the back frame 10 a forming the skeleton of the seat back 10.
The holding member 50 is formed in an open shape on the upper side, and a second peripheral wall 52 capable of receiving the stay 21 inserted from the insertion port 11a of the support 11 is formed on the upstream side in the insertion direction S. ing. A first connector 30 that can receive the second connector 40 in the insertion direction S is formed on the downstream side of the second peripheral wall 52 in the insertion direction S. The former 2nd surrounding wall 52 is arrange | positioned in the position on the extension line | wire of the insertion port 11a of the support 11, and is formed in the shape which has the substantially same internal diameter as this insertion port 11a. The latter first peripheral wall 51 is formed in a stepped shape from the lower end of the second peripheral wall 52 so as to have a reduced diameter. Thus, the first peripheral wall 51 is formed in a shape having an inner diameter substantially the same as the cylindrical inner diameter of the first connector 30 at a position on the extension line of the insertion port 11 a of the support 11. The first peripheral wall 51 is formed in such a length that only the lower part of the columnar shape of the second connector 40 is inserted, and the second connector 40 is surrounded by the second engagement claw 42 by the second peripheral wall 52. Hold it in a state exposed to the space.
The first peripheral wall 51 is formed with a first claw hook 51a. The first claw hooks 51 a are respectively formed at two axially symmetrical positions of the first peripheral wall 51. Specifically, the first claw hook portion 51 a is formed as a square opening shape penetrating in the radial direction of the first peripheral wall 51. The first claw hook portion 51a functions as a hook portion that hooks the first engagement claw 41 of the second connector 40 on the rectangular edge surface.
In addition, a regulation protrusion 51 b having a shape protruding inward in the radial direction from the first peripheral wall 51 is formed at the lower end portion of the first peripheral wall 51. The restricting projection 51b functions as a restricting portion that abuts the bottom surface of the second connector 40 and restricts movement in the insertion direction S. Therefore, the movement of the second connector 40 locked to the holding member 50 in the insertion direction S is restricted by the restriction protrusion 51b.
Further, the lower end of the second peripheral wall 52, that is, the bent part surface that becomes the boundary surface with the first peripheral wall 51 is a restriction surface 53 that restricts the insertion of the stay 21.

Subsequently, a method of using the present embodiment will be described.
That is, as well shown in FIG. 1, with the first connector 30 attached to the lower end portion of the stay 21, the stays 21 and 22 are inserted into the insertion ports 11 a and 12 a of the supports 11 and 12. . As a result, as well shown in FIG. 2, the first connector 30 is inserted toward the second connector 40 waiting in the seat back 10.
Then, by further inserting the stay 21 from the state shown in the figure, the columnar shape of the second connector 40 is inserted into the cylindrical shape of the first connector 30 as well shown in FIG. Rarely, both are connected.
Thereafter, when a load is applied so as to move the stay 21 in the pulling direction H, the connection between the second connector 40 and the holding member 50 is maintained while the connection between the first connector 30 and the second connector 40 is maintained. The state is removed. As a result, as shown in FIG. 4, the stay 21 can be moved in the pulling-out direction H while maintaining the connected state of the first connector 30 and the second connector 40. Therefore, if the stays 21 and 22 are moved in the pull-out direction H to adjust the amount of insertion of the stays 21 and 22, one of the lock grooves 22b provided in the vertical direction of the stay 22 and the lock claw 12b can be meshed and locked. it can. Thereby, the headrest 20 can be hold | maintained in the height position which made the mesh lock.

  As described above, according to the wiring connection structure of the present embodiment, the first configuration has a simple configuration in which the strength of the engagement force between the two types of claws (the first engagement claws 41 and the second engagement claws 42) is set. The structure which cancels | releases the holding state to the holding member 50 of the 2nd connector 40 after connecting the 1 connector 30 and the 2nd connector 40 can be achieved. Specifically, the first engaging claw 41 and the second engaging claw 42 are different in size of the claw shape that is engaged with each other, or set with tapered surfaces 41a, 41b, 42a, 42b on the peripheral surfaces. Or different engagement force. Furthermore, by forming the restricting projection 51b on the holding member 50, the holding state of the second connector 40 when the first connector 30 is inserted into and connected to the second connector 40 can be stabilized.

Although the embodiment of the present invention has been described with respect to one example, the present invention can be implemented in various forms in addition to the above-described example.
For example, in order to set the strength of the engagement force of two kinds of claws, the size of each claw shape was varied, and a taper taper surface (inclined surface) was set on the peripheral surface. One of them may be set. However, when the inclined surface is not formed on the peripheral surface of the nail, the load applied to each nail is increased, so care must be taken not to cause problems such as component damage. Further, the inclined surface is not limited to a taper shape that is straightly tapered, and may be a taper shape, for example, a curved surface. Moreover, although an inclined surface may be set to the surrounding surface of a nail | claw, you may set to the surface part (edge surface of a nail | claw hanging part) on the side which a nail | claw is hooked.

It is a perspective view showing the outline of the wiring connection structure to the headrest of a vehicle seat. It is principal part sectional drawing showing the state before a 1st connector was inserted and connected with a 2nd connector. It is principal part sectional drawing showing the state by which the 1st connector was inserted and connected with the 2nd connector. It is principal part sectional drawing showing the state from which the connection state of the 2nd connector and the holding member was removed. It is a perspective view showing the appearance of the 1st connector. It is a perspective view showing the appearance of the 2nd connector. It is a bottom view of the 1st connector. It is a top view of the 2nd connector.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat 10 Seat back 10a Back frame 11, 12 Headrest support 11a, 12a Insert 12b Lock claw 12c Adjustment knob 20 Headrest 21 Headrest stay 21a Inner peripheral wall 21b Transmission line 21c Locking groove 22 Headrest stay 22a Outer wall 22b Lock groove 30 First connector 30a Tubular wall 30b Upper wall 31 Locking claw 31a Tapered surface 31b Tapered surface 32 Second claw hooking portion 33 Convex side terminal 40 Second connector 40a Peripheral wall 40b Upper wall 41 First engaging claw 41a Tapered surface 41b Tapered surface (Inclined surface)
42 Second engaging claw 42a Tapered surface 42b Tapered surface 43 Concave terminal 50 Holding member 51 First peripheral wall 51a First claw hook portion 51b Restriction projection 52 Second peripheral wall 53 Restriction surface Wb Wiring Wh Wiring S Insertion direction H Pull-out direction

Claims (5)

A wiring connection structure to a headrest of a vehicle seat for connecting wiring coming from a vehicle body side routed inside a seat back of a vehicle seat to wiring on a headrest side routed inside the headrest,
A first connector which is a connecting terminal connected to the wiring on the headrest side;
A second connector which is a connecting terminal connected to the wiring coming from the vehicle body side and connectable to the first connector;
The headrest is attached and fixed to the seatback by inserting a rod-like headrest stay provided integrally therewith from an insertion port provided on the upper surface of the seatback. ,
The first connector is formed to have a size equal to or smaller than the outer diameter of the headrest stay, and is fixed and held at the distal end portion in the insertion direction in the headrest stay,
The second connector is locked to the holding member integrally assembled with the seat back by hooking a nail at a time before being connected to the first connector. It is held as a connected state where movement in the insertion direction is restricted at a position on the extension line,
The first connector is inserted into the second connector by inserting the headrest stay to the end position where the headrest stay can be inserted, and the first connector is locked to the second connector by hooking the claws. And are held as connected to each other,
The engaging force of the claw that holds the connected state between the first connector and the second connector is set to be stronger than the engaging force of the claw that holds the connected state between the second connector and the holding member,
By moving the headrest stay in the direction in which the first connector and the second connector are inserted and connected, and adjusting the amount of insertion, the connection state between the first connector and the second connector is changed. The wiring connection structure to the headrest of the vehicle seat, wherein the connection state between the second connector and the holding member is released while being held. A wiring connection structure to the headrest of the vehicle seat according to claim 1,
To the headrest of the vehicle seat, wherein the holding member for holding the second connector is formed with a regulation protrusion that abuts the bottom surface of the second connector and regulates movement in the insertion direction. Wiring connection structure. A wiring connection structure to the headrest of the vehicle seat according to claim 1 or 2,
The first connector is formed in a cylindrical shape that can be inserted into the rod-shaped inside of the headrest stay,
The second connector is formed in a pillar shape that can be inserted into the cylindrical shape of the first connector,
The cylindrical wall of the second connector includes a plurality of first engaging claws and a plurality of second engaging claws that protrude radially outward from the cylindrical wall and that can be bent and deformed in the radial direction. Is formed,
The first engaging claw is elastically hooked and locked to a radially recessed first claw hook portion formed in the holding member by inserting the second connector into the holding member. And
The second engaging claw is formed on a hollow second claw hook formed on the inner side of the cylindrical wall of the first connector by inserting the second connector into the cylindrical shape of the first connector. A wiring connection structure to a headrest of a vehicle seat, wherein the vehicle seat is elastically hooked and locked. A wiring connection structure to a headrest of a vehicle seat according to claim 3,
The first engaging claw formed on the cylindrical wall of the second connector is set to have a weaker engaging force than the second engaging claw by forming the claw shape smaller than the second engaging claw. A wiring connection structure to a headrest of a vehicle seat. A wiring connection structure to a headrest of a vehicle seat according to claim 3 or 4,
The first engaging claw formed on the cylindrical wall of the second connector is pressed in contact with the first claw hook portion of the holding member when the second connector is released from the connected state with the holding member. Is formed as an inclined surface that tapers the first engaging claw in the pulling direction, and the engaging force is set to be weaker than that of the second engaging claw due to the gradient of the inclined surface. A wiring connection structure to a headrest of a vehicle seat.

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