JP5397205B2 - Headrest assembly structure - Google Patents

Description

  The present invention relates to a structure for assembling a headrest, and more specifically, a stay with respect to a base assembled to a back frame so that a headrest stay inserted into a member to be inserted assembled to a seat back can be awaited. The present invention relates to a structure for assembling a headrest capable of engaging a stay with a slider in a state in which a standby member is made to wait on a slider that can slide in the insertion direction.

  Conventionally, when assembling the headrest to the seat back, the headrest stay tip is assembled to a slider that can be slid up and down with respect to the back frame, and the slider is slid up and down with a motor to raise and lower the headrest relative to the seat back. An assembly structure of a headrest that can be made is already known. Here, in Patent Document 1 below, an active type headrest (a headrest of a type that jumps out toward the back of the head of the occupant seated on the seat when detecting the occurrence of a rear collision in the vehicle, (Hereinafter simply referred to as “active headrest”) when performing the work of assembling to the seat back, that is, when performing the work of assembling the active headrest to the seat back by inserting the active headrest stay into the seat back support, A technique is disclosed in which a thrust member that pushes up a rod suspended inside a stay is made to wait below a support. Thus, when the operation of assembling the active headrest to the seat back is performed, the stay of the active headrest and the protruding member can be associated with each other, so that the active headrest can be efficiently assembled to the seat back.

JP 2009-67238 A

  However, in the above-described conventional technology, for example, from the viewpoint of reducing the number of parts, when the active headrest is lifted and lowered in a manual state (in a manual state with the motor removed) without using a motor, the slider is Since it slides downward, it was not possible to wait in advance for the protrusion member below the support. As a result, as described above, even if the active headrest is assembled to the seat back, the active headrest stay and the protruding member cannot be associated with each other, so that the active headrest can be efficiently assembled to the seat back. could not.

  The present invention is intended to solve such a problem, and its purpose is to perform the work of assembling the headrest to the seat back even if the headrest is lifted and lowered manually without using a motor. It is an object of the present invention to provide a headrest assembling structure capable of making a headrest stay and a standby member correspond to each other.

The present invention is for achieving the above object, and is configured as follows.
According to the first aspect of the present invention, the stay of the headrest inserted in the inserted member attached to the seat back can be awaited in the direction of inserting the stay with respect to the base assembled to the back frame. A headrest assembly structure that allows the stay to engage the slider with the standby member waiting on the slideable slider, and a tension spring is hung between the slider and the back frame side. With this tension spring, the slider is held by the back frame so that the standby member can wait for the stay of the headrest inserted into the inserted member.
According to this structure, when performing the operation | work which assembles a headrest to a seat back, a slider can be made to wait under a support by a tension spring. Therefore, when the operation of assembling the headrest to the seat back is performed, the stay of the headrest and the standby member (for example, an inflator) can be associated with each other.

The invention according to claim 2 is the headrest assembly structure according to claim 1, wherein the inserted member is inserted in a manner that penetrates the holder fixed to the back frame and the holder. The support is configured such that the tip of the support can be inserted into the slider, and the insertion is set in a tapered shape that tapers in the insertion direction. It is.
According to this configuration, the support can be inserted into the slider so that the support and the slider are in the centering state. Therefore, for example, when the rod is suspended inside the stay and the inflator is attached to the slider, the rod can be reliably pushed up when the inflator is activated.

FIG. 1 is an exploded perspective view showing the inside of a seat back according to an embodiment of the present invention. FIG. 2 is a perspective view showing the assembled state of FIG. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2 and shows a state before the headrest stay is inserted into the seatback support. FIG. 4 is a diagram illustrating a state in which a stay is inserted from the state illustrated in FIG. 3. FIG. 5 is a diagram illustrating a state in which a stay is further inserted from the state illustrated in FIG. 4. FIG. 6 is a diagram illustrating a state in which the stay is engaged with the slider from the state illustrated in FIG. 5.

  Hereinafter, the form for implementing this invention is demonstrated using FIGS. In the following description, an inflator 46 will be described as an example of a standby member waiting for the stay 60. In the following description, the terms “up”, “down”, “front”, “rear”, “left”, and “right” refer to the directions of “up”, “down”, “front”, “rear”, “left”, “right”, The direction of up, down, front, back, left and right is shown.

  First, with reference to FIGS. 1-3, schematic structure of the seat back 3 in the vehicle seat 1 which concerns on the Example of this invention is demonstrated. The seat back 3 includes a back frame 10 that forms the contour, a cushion (not shown) that wraps the back frame 10, and a skin (not shown) that covers the surface of the cushion.

  Of the constituent members of the seat back 3, the back frame 10 will be described in detail. The back frame 10 is fixed to a pair of left and right side frames 12, 12 so as to bridge the upper portions of both side frames 12. The frame 14 is substantially U-shaped. The upper frame 14 is fixed with substantially cylindrical holders 16, 16 on the left and right sides thereof. In addition, since a cushion and a seat cover may be a well-known structure, these detailed description shall be abbreviate | omitted.

  Both holders 16 and 16 are assembled with substantially cylindrical supports 18 and 18 into which a pair of left and right stays 60 and 60 of a headrest (not shown) described later can be respectively inserted. The holder 16 and the support 18 correspond to the “member to be inserted” described in the claims. Both supports 18 and 18 are each formed in a tapered shape (hereinafter referred to as “tapered surface 18 a”) so that the tips thereof are tapered.

  When the left stay 60 of the headrest described later is inserted into the left support 18 among the supports 18, 18, the height position of the inserted left stay 60 with respect to the seat back 3 is manually adjusted. Possible known height adjustment mechanisms (not shown) are provided. Thereby, since the height position of the headrest assembled | attached to the seat back 3 can be adjusted, the height position of a headrest can be adjusted according to the physique (height) of the passenger | crew who seated on the vehicle seat 1. FIG.

  A bracket 20 is fixed to the upper frame 14 between the holders 16 and 16. A substantially rectangular base 30 whose longitudinal direction is the vertical direction is assembled to the bracket 20 via bolts 32 and 32. A slider 40 that can be slid through a guide (not shown) along the longitudinal direction is assembled to the base 30.

  At this time, the slider 40 is assembled to the base 30 with a tension spring 50 hooked between itself and the upper frame 14. Thus, when the headrest is assembled to the seat back 3, the fitting tube portion 44 of the slider 40 is placed below the left support 18 so that an inflator 46, which will be described later, is in a waiting state at the tip of the stay 60 inserted into the support 18. Can be made.

  This description is described in the claims, “A tension spring is hung between the slider and the back frame side, and the stay of the headrest inserted into the inserted member by the tension spring is hung. The slider is held with respect to the back frame so that the standby member can wait. Further, the base 30 is formed with a stopper 34 for preventing the assembled slider 40 from dropping off.

  On the left side of the slider 40, a fitting tube portion 44 having a through hole 42 penetrating along the vertical direction is integrally formed. In the cutout groove 44a formed on the outer periphery of the fitting cylinder portion 44, one of the flexible substantially U-shaped engagement pins 48 (left side in FIG. 3) is fitted. . Then, the left stay 60 can be engaged with the slider 40 by fitting the other end of the engagement pin 48 into a notch 60b of the left stay 60 described later. This will be described in detail later.

  The through hole 42 of the fitting tube portion 44 is formed so that a left stay 60 described later can be inserted together with the left support 18 described above from above. Therefore, the upper side of the through hole 42 is formed in a tapered shape (hereinafter referred to as “tapered surface 42 a”) so that the inner peripheral surface thereof can correspond to the tapered surface 18 a of the support 18 described above. These descriptions are described in the claims. "The tip of the support can be inserted into the slider, and this insertion is set in a tapered shape that tapers in the insertion direction." It corresponds to.

  Further, the through-hole 42 is mounted in such a manner that the inflator 46 is inserted from below. Here, the inflator 46 will be described in detail. The inflator 46 is electrically connected to an ECU (not shown) provided in the vehicle seat 1. When the ECU detects that a rear collision has occurred in the vehicle, It is mounted so that the rod 62 suspended inside the stay 60 described later can be pushed up by protruding the inside. The seat back 3 is configured in this way.

  Next, a schematic configuration of a headrest (not shown) assembled to the seat back 3 described above will be described. The headrest includes a pair of left and right stays 60, 60 that assemble itself to the upper position of the seat back 3, a cushion (not shown) that wraps both the stays 60, 60, and a skin (not shown) that covers the surface of the cushion. ).

  The headrest is provided with a mechanical mechanism (not shown) inside the cushion. When the rod 62 suspended inside the left stay 60 is pushed up by the inflator 46, the mechanical mechanism is locked. Since it is cancelled | released, it is what is called an active headrest which can be made to jump out toward the passenger | crew's head of the passenger | crew who is seated in the vehicle seat 1 in the front side.

  Both stays 60, 60 are each formed in a tapered shape (hereinafter referred to as “tapered surface 60 a”) so that the tips thereof are tapered. Of the two stays 60, 60, the left stay 60 is formed with a notch 60b on the outer peripheral surface on the tip side. The headrest is configured in this way.

  Next, a structure for assembling the above-described headrest to the seat back 3 will be described with reference to FIGS. First, the headrest stays 60, 60 are respectively inserted into the supports 18, 18 assembled to the holders 16, 16 of the upper frame 14 (see FIG. 3). Then, as shown in FIG. 4, against the biasing force of the tension spring 50, the other of the engaging pins 48 (the right side in FIG. ) Will bend in the direction of spreading. As a result, the other of the engaging pins 48 gets over the tapered surface 60a of the stay 60 (see FIG. 5).

  Further, when the headrest stay 60 is inserted against the urging force of the tension spring 50, the other end of the engagement pin 48 is fitted into the notch 60b of the stay 60 due to the bending restoring force acting on the engagement pin 48 (see FIG. 6). Thereby, since the stay 60 and the slider 40 are fastened, the stay 60 can be assembled to the slider 40. And the height position with respect to the seat back 3 is manually adjusted for the assembled stay 60 by the above-described height adjusting mechanism, and the assembly of the headrest is completed. In this way, the headrest can be assembled to the seat back 3.

  As already described, since the inflator 46 is assembled to the slider 40 so that the front end of the stay 60 is in a standby state, when a rear collision occurs in the vehicle, the front side of the headrest is placed on the vehicle seat 1. It goes without saying that it can be made to jump out toward the back of the head of the occupant seated in the vehicle.

  The headrest assembly structure according to the embodiment of the present invention is configured as described above. According to this configuration, when the operation of assembling the active headrest to the seat back 3 is performed, the fitting tube portion 44 of the slider 40 can be made to wait under the left support 18 by the tension spring 50. Therefore, when the operation of assembling the active headrest to the seat back 3 is performed, the stay 60 of the active headrest and the inflator 46 can be associated with each other, so that the active headrest can be efficiently assembled to the seat back 3. Further, according to this configuration, the slider 40 is urged upward by the tension spring 50. Therefore, for example, when the height position of the active headrest is adjusted from the lower position to the upper position, this urging force is used. It can be adjusted with a light operating load.

  Further, according to this configuration, the upper side of the through hole 42 of the slider 40 is formed in a tapered shape so that the inner peripheral surface thereof can correspond to the tapered surface 18 a of the support 18. Therefore, the support 18 can be inserted into the through hole 42 of the slider 40 so that the support 18 and the through hole 42 of the slider 40 are in the centering state. Therefore, as in this embodiment, for example, when the rod 62 is suspended inside the stay 60 and the inflator 46 is mounted in the through hole 42 of the slider 40, when the inflator 46 is operated, The rod 62 can be pushed up.

The contents described above are only related to one embodiment of the present invention, and do not mean that the present invention is limited to the above contents.
In the embodiment, the inflator 46 has been described as an example of a standby member waiting for the stay 60. However, it is not limited to this, For example, a female connector etc. may be sufficient. In that case, in place of the rod 62, a male connector capable of accommodating this female connector is provided inside the stay 60.

  In the embodiment, an active type headrest is described as an example of the headrest. However, the present invention is not limited to this, and an inactive type headrest may be used. In this case, for example, a male connector is provided in the stay 60 in place of the rod 62, and a female connector that can handle this male connector is provided in place of the inflator 46.

3 Seat back 10 Back frame 16 Holder (member to be inserted)
18 Support (inserted member)
30 Base 40 Slider 46 Inflator (Standby member)
50 tension spring 60 stay

Claims (2)

In order to be able to wait for the stay of the headrest inserted into the inserted member attached to the seat back, the standby member is attached to the slider that can slide in the insertion direction of the stay with respect to the base assembled to the back frame. A headrest assembly structure capable of engaging a stay with a slider in a waiting state,
A tension spring is hung between the slider and the back frame side, and the tension spring thus held back allows the standby member to wait for the stay of the headrest inserted into the member to be inserted. An assembly structure of a headrest characterized by holding a slider with respect to a frame. The headrest assembly structure according to claim 1,
The member to be inserted is composed of a holder fixed to the back frame and a support inserted in a shape penetrating the holder,
The tip of the support can be inserted into the slider,
The insertion structure of the headrest, wherein the insertion is set in a tapered shape that tapers in the insertion direction.

Images