JP2008049820A - Wire connection structure to head rest of vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To release the retaining state of a connector awaiting at a seat back side without applying unreasonable load in an insertion direction to a constituent part such as a connector. <P>SOLUTION: The structure for connecting a wire Wb on the seat back side and a wire Wh on the head rest side has a first connector 30 connected to the wire Wh; a second connector 40 connected to the wire Wb; and a holder 50 for retaining this. The first connector 30 has a size stored in an outer diameter of a head rest stay 21 and is retained at its distal end. In the second connector 40, engagement claws 41a, 42a are hooked on outer claw hooking parts 51a, 52a of the holder 50. Spacers 43, 44 enlarged/displaced in a radial direction by being pressed by insertion force of the first connector 30 are formed on the second connector 40. The spacers 43, 44 press the corresponding outer claw hooking parts 51a, 52a from the inner side and release the hooking state with the hooking claws 41a, 42a. <P>COPYRIGHT: (C)2008,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.

2. Description of the Related Art 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 within 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 so as to pass through the inside of the headrest stay for attaching and fixing the headrest to the seat back. The headrest stay is formed so as to penetrate inside in a cylindrical shape, and holds the first connector that is connected with the tip of the cylinder (lower end opening). 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 set in a standby state so as to be connected to the first connector held at the end of the cylinder in accordance with the insertion operation of the headrest stay.
Here, after the second connector is connected to the first connector by an operation of inserting the headrest stay, the second connector is pressed by the insertion force so as to be disengaged from the holder. Thereby, even after the 1st connector and the 2nd connector are connected, insertion operation of a headrest stay can be permitted, and attachment fixation to a seat back of a headrest can also be performed favorably.

JP 2002-184523 A

  However, in the above-described conventional technique, an excessive load may be applied to each connector and the holder that holds the connector by the operation of inserting the headrest stay. That is, in this prior art, the 2nd connector is engaged with the latching | locking part of the holder in the state narrowed elastically. Then, by performing an operation of inserting the headrest stay into the second connector, the second connector is forcibly pushed down against the elastic hooking force. Here, the engaging force of the second connector is set to be strong to some extent in order to provide reliability in connection with the first connector. Therefore, by performing an operation of inserting the headrest stay against the above-mentioned hooking force, an unreasonable load is applied to the hooking part of the second connector and the holder and other parts.

  The present invention was devised as a solution to the above-described problem, 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 an operation of inserting a headrest stay. In the wiring connection structure to the headrest that releases the held state of the connector, the held state of the standby connector can be released without applying an excessive load in the insertion direction to components such as connectors. There is.

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. It is a wiring connection structure, and is connected to the first connector as a connection terminal connected to the wiring on the headrest side, and connected to the wiring coming from the vehicle body side, and is connected to the first connector by being connected to the first connector. A second connector as a holdable connection terminal; and a holder fixed to the seat back so as to hold the second connector in a state waiting in the seat back, and the headrest is provided integrally therewith. By attaching the stick-shaped headrest stay from the insertion port provided on the upper surface of the seat back, it is attached to the seat back and fixed The first connector is formed to have a size equal to or smaller than the outer diameter of the headrest stay, and is held at the tip of the headrest stay in the insertion direction. The second connector is It is arranged at a position on the extension line of the seat back insertion slot, and a plurality of hooking outer claws formed so as to protrude outward in the radial direction perpendicular to the insertion direction of the headrest stay are always used in the holder. As a state of being engaged with the corresponding outer claw hooks formed from the inside, the holder is in a holding state in which relative movement in the insertion direction with respect to the holder is restricted, and the holder is an outer claw that holds the second connector The inner diameter between the hooks is set to be equal to or larger than the outer diameter of the rod-shaped headrest stay, and the headrest stay is inserted into the second connector from the insertion port. A spacer is formed that is pressed by the insertion force of the first connector when being inserted and connected to expand and displace outward in the radial direction, and the spacer is pressed outward in the radial direction. The corresponding outer claw hooks formed on the inner claw are pressed from the inside, and the outer claw hooks are expanded and displaced to a radial position where the inner diameter is the same as or wider than the outer diameter of the hooking outer claw of the second connector. The holding state of the second connector by the holder is released.
According to the first aspect of the invention, the second connector is normally held by the holder at a position on the extension line of the seat back insertion port, and waits for the first connector to be inserted together with the headrest stay. ing. When the first connector is inserted and connected to the second connector, the second connector is pressed by the insertion force of the first connector to expand and displace the spacer. Then, by the expansion displacement of the spacer, the outer claw hook portion of the holder that is engaged with the engagement outer claw of the second connector is expanded and displaced, and the engagement state with the engagement outer claw is released. Thereby, since the holding state of the second connector by the holder is released, even if the headrest stay is further inserted after that, the component parts such as the connectors and the holder are not subjected to an excessive load in the insertion direction. .

Next, a second invention is characterized in that, in the first invention described above, the holder is formed such that the holding space for holding the second connector penetrates the headrest stay in the insertion direction. To do.
According to the second aspect of the present invention, since the holding space of the holder is formed so as to penetrate, the first connector and the second connector that are inserted and connected to each other can pass under the holder. Moreover, the holder is set to have the same inner diameter as the outer diameter of the headrest stay between the outer claw hooks that hold the second connector. Therefore, the holder guides the movement of the headrest stay in the insertion direction, but does not obstruct the pressing of the headrest stay from the lateral direction.

Next, according to a third aspect of the present invention, in the first or second aspect described above, the insertion connection structure between the first connector and the second connector is a radial direction formed in the second connector by insertion of the first connector. A plurality of hooking inner claws protruding inwardly are respectively elastically hooked into the inner hook hooking portions formed in the outer surface of the first connector and recessed in the radial direction. The relative separation movement in the insertion direction with respect to the first connector is regulated, and the contact regulation surface between the engagement inner claw and the inner claw engagement part that regulates this relative separation movement is different. It is characterized by being directed perpendicular to the insertion direction.
According to the third aspect of the invention, the regulating force that regulates the relative separation movement between the first connector and the second connector is perpendicular to the mutual contact regulating surfaces that are oriented perpendicular to the insertion direction. Works.

Next, according to a fourth aspect of the present invention, in the third aspect described above, a second connector in a state of being inserted and connected to the first connector is disposed at a position upstream of the outer claw hook portion of the holder in the insertion direction. By moving in the pull-out direction opposite to the insertion direction, it comes into contact with the hook inner claw formed on the second connector, and the hook inner claw is moved outward in the radial direction as the second connector moves in the pull-out direction. A guide surface for moving and guiding is formed, and the engagement state between the engagement inner claw and the inner claw engagement portion formed in the first connector is released by moving the engagement inner claw outward in the radial direction. It is characterized by that.
According to the fourth aspect of the present invention, the guide surface moves in the radial direction so as to disengage the hooking inner pawl from the inner hook hooking portion of the first connector brought into the hooking state in accordance with the movement of the second connector in the pulling-out direction. Guide you to move outward. Thereby, the engagement state of the engagement inner claw and the inner claw engagement portion is released.

The present invention can obtain the following effects by taking the above-described means.
First, according to the first invention, the holding state of the second connector held in standby can be released without applying an excessive load in the insertion direction to components such as connectors.
Furthermore, according to the second invention, the headrest stay can be smoothly moved to a region where the headrest stay is inserted further than the position where the holder is located. Therefore, when this connection structure is applied to, for example, a structure of a type in which the adjustment of the vertical position of the headrest can be freely performed by manual operation, it can be set at a position other than the lowermost position of the vertical movement region.
Furthermore, according to the third aspect of the invention, it is possible to make it difficult for the second connector inserted and connected to the first connector to be disconnected.
Furthermore, according to the fourth aspect of the invention, the second connector whose insertion and connection state is difficult to come off can be easily removed from the first connector.

  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 of the vehicle seat 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 a headrest of a vehicle seat. FIG. 2 is an exploded perspective view showing an overview of the first connector 30, the second connector 40 and the holder 50. FIG. 3 is an enlarged perspective view of a main part of the second connector 40. FIG. 4 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. 5 is a cross-sectional view of the main part showing a state in which the first connector 30 is inserted into the second connector 40 and the engaging claws 41a and 42a and the spacers 43 and 44 are expanded and displaced. FIG. 6 is a cross-sectional view of the main part showing a state in which the first connector 30 is inserted and connected to the second connector 40. FIG. 7 is a cross-sectional view of the main part showing a state in which the hooking claws 41 a and 42 a of the second connector 40 are removed from the outer hooking parts 51 a and 52 a of the holder 50. FIG. 8 is a cross-sectional view of a main part showing a state in which the second connector 40 is moved relatively away from the holder 50. FIG. 9 is an enlarged view of a main part showing a state in which the first connector 30 and the second connector 40 are passed through the lower part of the holder 50. FIG. 10 is an essential part enlarged view showing a state in which the connection state of the second connector 40 with respect to the first connector 30 is released. Hereinafter, the wiring connection structure to the headrest of the vehicle seat 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. . 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 has a lower end portion (not shown) connected to a power source on the vehicle body side, and is drawn into the seat back 10. Yes. In addition, a second connector 40 serving as a connection terminal is connected to the illustrated upper end.
The first connector 30 and the second connector 40 are connected by being inserted into each other, and the wirings Wh and Wb 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, they are elastically hooked to each other, and can maintain the connected state in a natural state. Therefore, the wiring Wb coming from the vehicle body side 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 attached to the lower end of one stay 21 among 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. Yes. The stays 21 and 22 can be inserted into the cylindrical headrest supports 11 and 12 (hereinafter referred to as supports 11 and 12) provided on the upper surface portion of the seat back 10 from the insertion ports 11 a and 12 a, respectively. ing. Therefore, the headrest 20 can be held in a state of being attached to the upper portion of the seat back 10 by inserting the stays 21 and 22. In addition, the first connector 30 attached to the lower end of the stay 21 can be inserted into the insertion port 11a.
On the other hand, the second connector 40 is held by a holder 50 fixed inside the seat back 10. The holder 50 is disposed below the support 11 and is fixed integrally with the seat back 10. Specifically, as shown in FIG. 2, the holder 50 is formed in a substantially cylindrical shape as a whole, and can be held in a state where the second connector 40 is fitted in the holding space 50 a inside the cylinder. . As a result, as well shown in FIG. 4, the second connector 40 is arranged at a position on the extension line of the insertion port 11a, and is held in a standby state waiting for the first connector 30 to be inserted. Yes.
Hereinafter, the details of each of the above constituent members will be described.

First, the stays 21 and 22 will be described.
That is, as well shown in FIG. 4, the stay 21 on the side where the first connector 30 is attached is formed with a through-line 21c through which the wiring Wh can be passed through the rod-shaped interior. Yes. As well shown in FIG. 2, notches 21 a and 21 b are formed at the lower end of the stay 21, and can hold locking claws 31 and 32 of the first connector 30 described later. These notches 21 a and 21 b are formed at two positions facing each other in the circumferential direction of the stay 21. Thereby, as well shown in FIG. 4, the stay 21 holds the first connector 30 in a state where the wiring Wh is inserted into the stay 21 and the lower end thereof is locked to the lower end thereof.
As shown well in FIG. 1, the stay 22 on the other side has a plurality of recessed locking grooves 22d formed along the length direction of the outer peripheral surface thereof. The locking groove 22d is provided at a circumferential position where the locking groove 22d is engaged and locked with a lock claw 12b provided so as to be able to project and move into the opening 12a of the support 12. Here, the lock claw 12b is normally urged so as to protrude into the mouth of the insertion port 12a. Therefore, the lock claw 12b automatically engages and locks when the stay 22 is inserted and the locking groove 22d and the height position coincide with each other. 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. The lock claw 12b is retracted out of the insertion port 12a against the above-mentioned urging by performing a pushing operation of the 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 cannot be locked with the locking groove 22d. That is, the movement of the stay 22 in the insertion direction S can be permitted.

Next, the first connector 30 will be described.
That is, as well shown in FIG. 4, the first connector 30 includes locking claws 31 and 32, connection pins 33, pushing claws 34 and 35, and inner claw hook portions 36 and 37.
Here, the first connector 30 is integrally formed of synthetic resin, and has flexibility to be elastically hooked to the second connector 40. As shown well in FIG. 2, the first connector 30 is formed in a size that fits within the outer diameter range of the stay 21 and is held in a state of being attached to the lower end of the stay 21. . Specifically, as shown in FIG. 4, the first connector 30 is formed with locking claws 31 and 32 having a shape protruding outward in the radial direction on both outer side portions of the peripheral wall 30 a. These locking claws 31 and 32 are formed such that the outer diameter dimension therebetween is the same as the outer diameter dimension of the stay 21. Therefore, the locking claws 31 and 32 are respectively fitted into the notches 21 a and 21 b, thereby locking the first connector 30 with the notches 21 a and 21 b so that the first connector 30 is not inserted into the stay 21 any more. Further, the first connector 30 is formed such that the portion above the locking claws 31, 32 is accommodated in the through line 21 c of the stay 21. Therefore, the first connector 30 is inserted into the through line 21c of the stay 21 from the upper side, and the locking claws 31 and 32 are engaged with the notches 21a and 21b, respectively. It is possible to fix the position by being locked. In a state where the first connector 30 is locked to the stay 21, the lower end portion of the first connector 30 is exposed from the lower end of the stay 21. The first connector 30 is prevented from rotating in the circumferential direction in the stay 21 by the engagement between the locking claws 31 and 32 and the notches 21a and 21b. Further, the first connector 30 is held so that it does not fall off from the stay 21 when a protrusion protruding from the first connector 30 enters and engages with a hole (not shown) formed in the peripheral wall of the stay 21. ing.
Next, the connection pin 33 is provided in a form protruding downward inside an opening formed at the lower end of the first connector 30. The connection pins 33 are connected to each other in a state where they can be energized by being inserted through a connection port 45 formed at an upper end portion of the second connector 40 described later. As shown in FIG. 6, the connection pin 33 is inserted into the opening formed in the lower end portion of the first connector 30 until the upper end portion of the second connector 40 is inserted into contact with each other in the insertion direction. It can be plugged in. Next, the pushing claws 34 and 35 are formed at lower portions of the locking claws 31 and 32, as well shown in FIG. The pushing claws 34 and 35 are formed such that the outer diameter dimension therebetween is substantially the same (slightly smaller) as the outer diameter dimension of the stay 21. Further, the pushing claws 34 and 35 are formed in a tapered shape toward the lower end of the first connector 30. That is, the push claws 34 and 35 are formed in a shape that tapers in the insertion direction S of the stay 21.
Next, the inner claw hooks 36 and 37 are formed at positions between the locking claws 31 and 32 and the pushing claws 34 and 35, respectively, as well shown in FIG. These inner claw hooks 36 and 37 are formed in a shape recessed in the radial direction with respect to the locking claws 31 and 32 and the pushing claws 34 and 35. Here, the lower surfaces of the inner hooks 36 and 37 are formed perpendicular to the insertion direction S as contact surfaces 36 a and 37 a that come into contact with the second connector 40 when engaged with the second connector 40. Here, the contact surfaces 36a and 37a correspond to the contact restriction surfaces of the present invention.

Next, the second connector 40 will be described.
That is, as well shown in FIG. 2, the second connector 40 has claw feathers 41 and 42, spacers 43 and 44, and a connection port 45.
Here, like the first connector 30, the second connector 40 is formed by being integrally formed of synthetic resin, and has the flexibility to be elastically hooked to the first connector 30. As shown well in FIG. 4, the second connector 40 is always held in a state of being hooked on the holder 50 before being inserted and connected by the first connector 30.
Specifically, as well shown in FIG. 2, the second connector 40 is formed with gate-shaped claw feathers 41 and 42 on both outer sides of the peripheral wall 40a. These nail pieces 41 and 42 are formed such that the gate shape faces outward in the radial direction, and both lower ends thereof are integrated with the peripheral wall 40a. Accordingly, the upper and lower free ends can be elastically bent and deformed inward and outward in the radial direction with the lower end portions thereof as the base ends. Further, the claw wing pieces 41 and 42 are formed as engaging claws 41 a and 42 a that are hooked to the holder 50 at the portions forming the upper arms of the gate shape. These hooking claws 41a and 42a are hooked from the inside to corresponding outer hooking hook portions 51a and 52a formed on the inner peripheral surface of the holder 50, as well shown in FIG. Thereby, the 2nd connector 40 is made into the holding state by which the relative movement to the insertion direction S with respect to the holder 50 was controlled.

Here, as well shown in FIG. 4, the claw shapes of the engaging claws 41a and 42a are triangular in cross-sectional view. Specifically, the lower surfaces of the engaging claws 41a and 42a are contact surfaces 41b and 42b that contact the upper surfaces (contact surfaces 51b and 52b) of the outer claw hook portions 51a and 52a. Here, the engaging claws 41a and 42a correspond to the engaging outer claws and the engaging inner claws of the present invention, and the contact surfaces 41b and 42b correspond to the contact regulating surfaces of the present invention. The contact surfaces 41b and 42b and the contact surfaces 51b and 52b are formed perpendicular to the insertion direction S. Accordingly, the relative movement of the second connector 40 in the insertion direction S with respect to the holder 50 is restricted with a strong force by the contact between the contact surfaces 41b and 42b and the contact surfaces 51b and 52b that are perpendicular to the holder 50. The Further, the inner side surfaces rising from the inner sides of the contact surfaces 41b, 42b are formed as tapered surfaces 41c, 42c rising outward in the radial direction.
The above engaging claws 41a and 42a engage with the outer claw engaging portions 51a and 52a of the holder 50, respectively, in a free state where the claw feather pieces 41 and 42 are not bent and deformed in the radial direction (shown in FIG. 4). In this hooking state, the hooking claws 41a, 42a are in a state where the outer portions of the claws are riding on the contact surfaces 51b, 52b of the outer hooking portions 51a, 52a. 52a is in contact with the insertion direction S. The hooking claws 41a and 42a are in a state in which the claw-shaped inner portions protrude inward in the radial direction from the outer hooking hook portions 51a and 52a. Therefore, the engaging claws 41a and 42a are formed on the outer surfaces of the pushing claws 34 and 35 of the first connector 30 when the first connector 30 is inserted into the second connector 40, as well shown in FIG. When pressed, it expands and displaces outward in the radial direction. Here, the width dimension in the circumferential direction of the pushing claws 34, 35 is formed to a size that fits in the gate-shaped internal space of the claw feather pieces 41, 42. That is, the pushing claws 34 and 35 do not interfere with both arm portions of the gate-shaped claw feather pieces 41 and 42. Therefore, the engaging claws 41a and 42a pass through the pushing claws 34 and 35 when the first connector 30 is completely inserted into the second connector 40, as shown well in FIG. Due to the restoring force, the inner hooks 36 and 37 enter and engage with each other. Thereby, the 2nd connector 40 will be in the state connected with the 1st connector 30 and connected so that electricity supply was possible. In this connected state, the contact surfaces 41b and 42b of the second connector 40 that face perpendicular to the insertion direction S are received by the contact surfaces 36a and 37a of the first connector 30 that also face perpendicularly. Therefore, the second connector 40 is held with a strong force so that it does not fall out of the first connector 30 due to the contact between the contact surfaces 41 b and 42 b and the contact surfaces 36 a and 37 a of the first connector 30. In this connected state, the upper end portion of the second connector 40 is in contact with the opening formed in the lower end portion of the first connector 30 in the insertion direction. Therefore, in this connected state, the second connector 40 is also pressed in the insertion direction S by further pressing the first connector 30 in the insertion direction S.

  Next, the spacers 43 and 44 are respectively formed in the gates of the nail feather pieces 41 and 42, as well shown in FIG. Here, in FIG. 3, the structures of the claw feather pieces 41 and the spacers 43 on one side are enlarged. As can be seen from the figure, the spacers 43 and 44 are formed in a rod shape that is long in the axial direction, and the lower end thereof is integrated with the peripheral wall 40a. As a result, the spacers 43 and 44 are configured so that the upper free ends thereof are elastically bent and deformed inward and outward in the radial direction independently of the claw feathers 41 and 42. As shown well in FIG. 4, the spacers 43 and 44 are arranged at positions inside the outer claw hooks 51 a and 52 a when the second connector 40 is always held by the holder 50. Therefore, the spacers 43 and 44 are pressed against the outer surfaces of the pressing claws 34 and 35 of the first connector 30 when the first connector 30 is inserted into the second connector 40, as well shown in FIG. Then, it expands and displaces outward in the radial direction. In accordance with the expansion displacement, the spacers 43 and 44 press the outer claw hook portions 51a and 52a of the holder 50 located on the outer side in the radial direction from the inner side to expand and displace outward. Specifically, as shown in FIG. 6, the spacers 43 and 44 are arranged so that the outer claws 51a and 52a of the holder 50 are engaged when the hooking claws 41a and 42a enter the inner claws 36 and 37, respectively. Then, the inner diameter is expanded and displaced to a radial position where the outer diameter between the engaging claws 41a and 42a is equal to or larger than the outer diameter. Thereby, since the engagement state of the engagement claws 41a and 42a and the outer claw engagement portions 51a and 52a is removed, the holding state of the second connector 40 by the holder 50 is released. Accordingly, as shown in FIG. 7, when the first connector 30 is further moved in the insertion direction S from the state shown in FIG. 6, the engaging claws 41a and 42a are guided by the spacers 43 and 44 and are engaged by the outer claws. It passes between the portions 51a and 52a and is dropped downward.

Next, the holder 50 will be described.
That is, the holder 50 has outer claw feathers 51 and 52 and claw removal parts 53 and 54 as well shown in FIG.
Here, the holder 50 is integrally formed of synthetic resin, and is formed in a substantially cylindrical shape as a whole. An inner space of the peripheral wall 50b having a cylindrical shape is formed as a holding space 50a that holds the second connector 40 in a fitted state. As shown well in FIG. 4, rod-like outer claw wing pieces 51 and 52 that are long in the axial length direction are formed on both sides of the peripheral wall 50b. These outer claw wing pieces 51 and 52 are integrated with the peripheral wall 50b at their lower ends as shown in FIG. As a result, the outer claw wing pieces 51 and 52 are configured such that the upper free ends thereof are elastically bent and deformed inward and outward in the radial direction. Here, as shown well in FIG. 4, the outer claw wing pieces 51, 52 are formed with claw-shaped outer claw hooks 51a, 52a projecting inward in the radial direction at the upper end portions thereof. Yes. The outer claw hooks 51 a and 52 a have the same inner diameter dimension as the outer diameter dimension of the stay 21 in a free state where the outer claw feather pieces 51 and 52 are not bent and deformed (shown in FIG. 4). Is formed. The lower surfaces of the outer claw hooks 51a and 52a are formed as tapered surfaces 51c and 52c that spread outward in the radial direction. The portions below the tapered surfaces 51c, 52c are formed so that the inner diameter dimension therebetween is wider than the outer diameter dimension between the engaging claws 41a, 42a of the second connector 40.
Next, the claw removing portions 53 and 54 are formed in a portion above the outer claw hook portions 51a and 52a (a portion on the upstream side in the insertion direction S). These claw removing portions 53 and 54 are formed in a claw shape that tapers in the insertion direction S. Specifically, the claw removing portions 53, 54 are formed as guide surfaces 53a, 54a whose claw-shaped lower surfaces rise outward in the radial direction. As shown in FIG. 10, the guide surfaces 53a and 54a are formed by moving the second connector 40 from the illustrated state of FIG. 9 in the removal direction O opposite to the insertion direction S. It contacts the tapered surfaces 41c and 42c of 42a. Therefore, by moving the second connector 40 in the unplugging direction O as it is, the engaging claws 41a and 42a are moved and guided by the guide surfaces 53a and 54a, and are expanded and displaced outward in the radial direction. Thereby, the engaging claws 41a and 42a are removed from the inner claw engaging portions 36 and 37 of the first connector 30, and the connection state between the first connector 30 and the second connector 40 is released. Here, the claw removing portions 53 and 54 are formed so that the inner diameter dimension therebetween is the same as the inner diameter dimension of the outer claw hook portions 51a and 52a, and the stay 21 is inserted together with the outer claw hook portions 51a and 52a. The movement in the direction S and the removal direction O is guided. In addition, although the inner diameter dimension of the outer claw hooking parts 51a and 52a and the claw removing parts 53 and 54 may be formed larger than the outer diameter dimension of the stay 21 in the free state, the outer diameters of the hooking claws 41a and 42a. It must be formed smaller than the dimensions.

Subsequently, a method of using the present embodiment will be described.
That is, as well shown in FIG. 5, when the first connector 30 is inserted into the second connector 40, the pushing claws 34, 35 sequentially move the engaging claws 41a, 42a and the spacers 43, 44 outward in the radial direction. It is pushed in the direction to expand and displace. As shown in FIG. 6, when the first connector 30 is completely inserted into the second connector 40, the engaging claws 41 a and 42 a are restored and engaged with the inner claw engaging portions 36 and 37. At the same time, the spacers 43 and 44 push the outer hooking portions 51a and 52a outward from the hooking claws 41a and 42a. Thereby, the 1st connector 30 and the 2nd connector 40 will be in the state inserted and connected so that electricity supply was possible. Then, by further moving the first connector 30 in the insertion direction S from this state, the connected state of the first connector 30 and the second connector 40 is maintained as shown in FIGS. It can be moved to the position removed from the holder 50. At this time, the outer claw hook portions 51a and 52a of the holder 50 are set to have the same inner diameter dimension as the outer diameter dimension of the stay 21, so that the stay 21 moves in the insertion direction S. Guides the movement without hindering it from being pushed in from the side.
Further, when the first connector 30 is extracted from the second connector 40 from the state illustrated in FIG. 9, the stay 21 may be moved in the removal direction O. Thereby, the 1st connector 30 and the 2nd connector 40 are changed to the reverse to the insertion direction S mentioned above, ie, the reverse order of Drawing 6-Drawing 9. At this time, the engaging claws 41a and 42a of the second connector 40 move in the removal direction O while being narrowed in the radial direction while being guided by the tapered surfaces 51c and 52c. Accordingly, the second connector 40 moves in the removal direction O so that the hooking claws 41a and 42a bite into the inner hooking portions 36 and 37, so that the connection state with the first connector 30 can be maintained. . As shown in FIG. 10, the engaging claws 41a and 42a of the second connector 40 come into contact with the guide surfaces 53a and 54a of the holder 50, so that the engaging claws 41a and 42a are guided to the guide surfaces 53a and 54a. It is expanded and displaced. As a result, in the second connector 40, the engaging claws 41a, 42a are removed from the inner claw engaging portions 36, 37, and the engaging state (connected state) with the first connector 30 is released. Thereby, the 2nd connector 40 remove | deviates from the guide surfaces 53a and 54a by the effect | action of gravity, and falls, and is returned to the state before the insertion connection shown by FIG.

  As described above, according to the wiring connection structure of this embodiment, the first connector 30, the second connector 40, the holder 50, and the like can be applied to the first connector without applying an excessive load in the insertion direction S. After the insertion connection with 30, the holding state of the second connector 40 with respect to the holder 50 can be released. Furthermore, since the holding space 50 a of the holder 50 is formed so as to penetrate in the insertion direction S of the stay 21, the stay 21 can be smoothly moved to a region where the stay 21 is further inserted than the holder 50. Therefore, when this connection structure is applied to a type of structure in which the adjustment of the vertical position of the headrest 20 can be freely performed by manual operation of the adjustment knob 12c as in this embodiment, it is other than the lowermost position of the vertical movement region. It can also be set at the location.

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, the wiring connection structure can also be applied to a configuration in which the headrest is moved up and down electrically. As such an electric mechanism, there is a configuration in which an elevator (move) for moving the headrest up and down is provided inside the seat back, and a lower end portion of the headrest stay is set in a seat portion of the elevator. In this case, by providing the holder in the seat portion of the elevator, it is not necessary to insert the headrest stay in the insertion direction, so that the bottom wall can be formed in the holder. That is, a seat for setting the headrest stay can be formed on the holder.
Moreover, each taper surface and guide surface shown in the said Example may be formed in the curved surface form.
Moreover, although the nail feather piece of the 2nd connector showed what was formed in the gate shape, it may be formed in the rod shape long in an axial length direction like a spacer. However, when the spacers and the engaging claws are provided side by side in the circumferential direction, it should be noted that the width dimension in the circumferential direction of the pushing claws of the first connector that presses the spacers increases.

It is a perspective view showing the outline of the wiring connection structure to the headrest of a vehicle seat. It is a disassembled perspective view showing the general appearance of the 1st connector, the 2nd connector, and the holder. It is a principal part expansion perspective view of a 2nd connector. 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 which inserted the 1st connector in the 2nd connector and expanded the displacement nail | claw and the spacer. It is principal part sectional drawing showing the state which inserted and connected the 1st connector with the 2nd connector. It is principal part sectional drawing showing the state which removed the latching claw of the 2nd connector from the outer claw hooking part of the holder. It is principal part sectional drawing showing the state which moved the 2nd connector relatively apart from the holder. It is a principal part enlarged view showing the state which let the 1st connector and the 2nd connector pass below the holder. It is a principal part enlarged view showing the state which canceled the connection state of the 2nd connector with respect to the 1st connector.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat 10 Seat back 11, 12 Headrest support 11a, 12a Insert 12b Lock claw 12c Adjustment knob 20 Headrest 21, 22 Headrest stay 21a, 21b Notch 21c Line 22d Locking groove 30 1st connector 30a Circumferential wall 31, 32 Locking claw 33 Connection pin 34, 35 Pushing claw 36, 37 Inner claw hook part 36a, 37a Contact surface (contact control surface)
40 2nd connector 40a Perimeter wall 41, 42 Claw feather piece 41a, 42a Engagement claw (engagement outer claw, engagement claw)
41b, 42b Contact surface (contact control surface)
41c, 42c Tapered surface 43, 44 Spacer 45 Connection port 50 Holder 50a Holding space 50b Peripheral wall 51, 52 Outer claw feather piece 51a, 52a Outer claw hook portion 51b, 52b Abutting surface 51c, 52c Taper surface 53, 54 Claw removal portion 53a, 54a Guide surface Wb Wiring Wh Wiring S Insertion direction O Removal direction

Claims (4)

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 as a connection terminal connected to the wiring on the headrest side;
A second connector as a connecting terminal that is connected to the wiring coming from the vehicle body side and can be connected to the first connector by being inserted and connected to the first connector;
A holder fixed to the seat back to hold the second connector in a waiting state inside the seat back;
The headrest is attached and fixed to the seat back by inserting a rod-like headrest stay provided integrally therewith from an insertion port provided in the upper surface portion of the seat back,
The first connector is formed to have a size equal to or smaller than the outer diameter of the headrest stay, and is held at the tip of the headrest stay in the insertion direction,
The second connector is disposed at a position on an extension line of the seat back insertion port, and is normally formed to protrude outward in the radial direction perpendicular to the insertion direction of the headrest stay. As a state in which the engaging outer claws are respectively engaged with the corresponding outer claw engaging portions formed on the holder from the inside, a holding state in which the relative movement in the insertion direction with respect to the holder is restricted,
The holder is set such that the inner diameter between the outer claw hooks holding the second connector is equal to or larger than the outer diameter of the rod-shaped headrest stay,
In the second connector, when the headrest stay is inserted from the insertion port and the first connector is inserted and connected, the second connector is pressed by the insertion force of the first connector to expand outward in the radial direction. Spacers are formed,
When the spacer is pressed outward in the radial direction, the corresponding outer claw hook portion formed on the holder is pressed from the inside, and the outer claw hook portion has an inner diameter engaged with the second connector. Wiring connection to the headrest of a vehicle seat, wherein the second connector is released from the holding state by being expanded and displaced to a radial position equal to or wider than the outer diameter of the outer claw Construction. A wiring connection structure to the headrest of the vehicle seat according to claim 1,
The holder has a wiring connection structure to a headrest of a vehicle seat, wherein a holding space for holding the second connector is formed so as to pass through the headrest stay in the insertion direction. A wiring connection structure to the headrest of the vehicle seat according to claim 1 or 2,
The insertion connection structure of the first connector and the second connector has a plurality of hooking inner claws formed in the second connector and projecting inward in the radial direction by insertion of the first connector. Each of the hooks is elastically engaged with a radially indented inner claw hook portion formed on the outer surface of one connector, and the second connector is relatively separated from the first connector in the insertion direction by the hooking. The movement is regulated,
A headrest of a vehicle seat, wherein a contact restricting surface between the engaging inner claw and the inner claw engaging portion that restricts the relative separation movement is directed perpendicular to the insertion direction. Wiring connection structure. A wiring connection structure to a headrest of a vehicle seat according to claim 3,
The second connector inserted into and connected to the first connector is moved in a removal direction opposite to the insertion direction at a portion upstream of the outer claw hook portion of the holder in the insertion direction. As a result, a guide surface is formed which comes into contact with the engaging inner claw formed on the second connector and moves and guides the engaging inner claw outward in the radial direction in accordance with the movement of the second connector in the removal direction. And the engagement state between the engagement inner claw and the inner claw engagement portion formed in the first connector is released by moving the engagement inner claw outward in the radial direction. Wiring connection structure to the headrest.

Images