JPH0937887A - Headrest device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a headrest small in tilting angle by effectively utilizing the headrest large in tilting angle. SOLUTION: The upper end part of an attachment leg 13 is turnably attached to a frame 12 disposed inside a cushion body 12 and the leg part 13a of the attachment leg 13 is inserted into an insertion hole 24 formed on the frame 12. The headrest is tilted t the attachment leg 13 of the frame 12 by the turning, and the tilting angle is defined as a range between a state where the leg part 13a is abutted on the front wall part 23a of the insertion hole 24 and the state where the leg part 13a is abutted on a rear wall part 23b. A spacer 40 is interposed between the front wall part 23a and the leg part 13a in the insertion hole 24 to change the tilting angle into small one.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a headrest device used by being attached to a seat back of a seat.

[0002]

2. Description of the Related Art Seats, especially vehicle seats,
It is common practice to attach a headrest to the seat back. The headrest is generally a cushion body and
It has a frame arranged in the cushion body and a mounting leg having one end attached to the frame and the other end extending to the outside of the cushion body, and the mounting leg is attached to a mounting hole formed in the seat back. It is supposed to be inserted.

The front-back tilt angle of the cushion body with respect to the mounting leg, that is, the front-back tilt angle of the cushion body with respect to the seat back varies according to the preference of a person who sits on the seat. Therefore, the mounting of the mounting leg to the frame is made rotatable, and the tilt angle can be adjusted by changing the rotational angle position (for example, Japanese Utility Model Laid-Open No. 3-87449). reference).

[0004]

By the way, in seats, particularly automobile seats, the tilting of the headrest may be restricted depending on the region (country) in which it is used.
That is, there is a demand to limit the tilting range of the headrest to a range that is considerably smaller than the generally set angular range (in an extreme case, limit the tilting angle to substantially zero). In this case, it is not preferable from the viewpoint of cost and the like to separately manufacture a general setting with a large tilt angle of the headrest and a special setting with a limited tilt angle.

Therefore, an object of the present invention is to effectively utilize a general headrest having a large tilt angle as it is,
It is an object of the present invention to provide a headrest device capable of easily forming a headrest having a limited tilt angle.

[0006]

Means for Solving the Problems In order to achieve the above object, the present invention has the following configuration. That is, a cushion body, a frame disposed in the cushion body, and a mounting leg having one end rotatably attached to the frame and the other end extending to the outside of the cushion body, In a headrest device in which the longitudinal tilt angle of the cushion body with respect to the mounting leg is changed within a predetermined angle range by changing the rotational angle position of the mounting leg with respect to the frame, the frame and the mounting leg are Is formed separately, and is provided with a spacer that acts on the frame and the mounting leg to limit the tilt angle to a range smaller than the predetermined angle range. Preferred embodiments of the present invention based on the above configuration are as described in claims 2 and 3 in the claims.

[0007]

According to the invention described in claim 1, in a general headrest having a large tilting angle, a tilting angle is adjusted by an extremely simple and inexpensive method of separately adding a spacer for restricting the tilting angle. You can get a limited headrest.

With the structure as described in claim 2, the tilt angle can be reliably regulated by the simple structure of inserting the spacer into the insertion hole formed in the frame and through which the mounting leg is inserted. be able to.

With the structure as described in claim 3, the spacer is locked to the frame by using the locking claw portion thereof, so that the frame is separately secured by using a fixing tool such as a bolt. The spacer can be attached easily and inexpensively as compared with the case where the spacer is attached to the spacer.

The structure as described in claim 4 is preferable in order to more firmly attach the spacer to the frame.

According to the structure described in claim 5, the concave portion of the frame into which the protrusion of the spacer is inserted is used to prevent deformation of the frame after injection molding. Therefore, it is not necessary to separately form the recess for inserting the projection.

With the structure as described in claim 6, the spacer and the headrest can be provided at low cost by forming the spacer as a whole into an integrally molded product made of synthetic resin.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, reference numeral 1 denotes a vehicle seat for a driver's seat or a passenger seat.
The seat 1 includes a seat cushion 2 attached to a floor surface of a vehicle body, and a bracket 3 at a rear end portion of the seat cushion 2.
The seat back 4 is attached so that the rotational position in the front-rear direction can be adjusted via the, and the headrest 10 is attached to the upper end portion of the seat back 4.

As is known, the headrest 10 has a cushion body 11, a frame 12 arranged in the cushion body 11, and mounting legs 13. Details of the frame 12 and the mounting legs 13 will be described with reference to FIGS. 2 to 5. First, the frame 12 is formed by injection molding synthetic resin as a whole. The frame 12 has a base portion 21 extending substantially vertically.
On the rear surface side of the base portion 21, a central mounting portion 22 and a pair of left and right guide wall portions 23L, 2 sandwiching the central mounting portion 22 are provided.
3R is formed. The guide wall portions 23L and 23R are
Through holes 24 are formed at the lower end of the base portion 21 and extend substantially vertically. As for the guide wall portions 23L and 23R, the front wall portion is indicated by the reference numeral 23a, the rear wall portion is indicated by the reference numeral 23b, and the left and right side wall portions are indicated by the reference numeral 23c,
The insertion hole 24 is defined by the walls 23a to 23c.

A guide wall portion 2 is provided at a lower end portion of the base portion 21.
The pair of left and right mounting leg support portions 25L, 25 are located between the 3L and 23R, that is, below the central mounting portion 22.
R is formed. Each part 22-25L, 25R
Is formed by bulging backward from the base portion 21, and is integrally formed as a whole by injection molding of synthetic resin. Then, in order to prevent "sink" that occurs due to the temperature drop immediately after injection molding, that is, to prevent deformation,
The concave portion is appropriately formed. As the deformation preventing recesses, the left and right side wall portions 23c of the guide wall portions 23L and 23R are each formed with a recess portion 26 that opens toward the lower opening end face thereof (see FIGS. 5 and 7).

The mounting leg 13 includes a pair of left and right leg portions 13a,
The pair of left and right leg portions 13a has a connecting portion 13b that connects the upper end portions of each other and extends in the left-right direction. Such a mounting leg 1
3 is integrally formed as a whole by bending a metal round bar, for example, an iron round bar.

The mounting leg 13 is mounted on the central mounting portion 22 of the frame 12 using the mounting bracket 14. The mounting bracket 14 is formed by bending a metal plate such as an iron plate, and has a pair of front and rear mounting plate portions 14.
a and 14b, and a holding portion 14c that connects the lower end portions of the pair of mounting plate portions 14a and 14b. Holding part 14
The c is formed to have a substantially cylindrical shape extending in the left-right direction corresponding to the outer shape of the connecting portion 14c of the mounting leg 13.

The attachment legs 13 are attached to the frame 12 as follows. First, the mounting leg 13
The connecting portion 13b of the pair of left and right guide wall portions 23L, 23
It is located above R and on the mounting leg support portion 25 located below the central mounting portion 22. Also, the mounting legs 13
The pair of left and right legs 13a of the
The lower end portion is inserted into the insertion holes 24 formed in L and 23R and extends downwardly from the frame 12, that is, the lower end portion is extended to the outside of the cushion body 11 as shown in FIG. To be done.

The connecting portion 13b of the mounting leg 13 is tightly fitted to the holding portion 14c of the mounting bracket 14. Then, the pair of mounting plate portions 14 a and 14 of the mounting bracket 14
b and the central mounting portion 22 of the frame 12 are sandwiched from the front-rear direction, and are closed together with the central mounting portion 22 by the bolts 31 and the nuts 32. The nut 32 is
It is previously welded to the mounting plate portion 14a. Further, the connecting portion 13b is formed with a protrusion 13c for sandwiching the mounting bracket 14 from the left-right direction and restricting the relative displacement in the left-right direction. The protrusion 13c is part of the connecting portion 13b. It is formed by welding.

The width in the front-rear direction of the insertion hole 24 through which the leg portion 13a of the mounting leg 13 is inserted, that is, the guide wall portions 23L and 23R.
The front-rear wall interval between the front-rear wall portions 23a and 23b is
It is made larger than the outer shape (outer dimension in the front-rear direction) of the leg portion 13a by a predetermined amount. On the other hand, as described above, the connecting portion 13b of the mounting leg 13 is fitted to the holding portion 14c of the mounting bracket 14 and is rotatable at this fitting portion. Therefore, the mounting leg 13 is rotatable about the axis extending in the left-right direction of the holding portion 14c, that is, the connecting portion 13b with respect to the frame 12 by a predetermined angle, that is, the mounting leg 13 is rotated by the frame 12 (the cushion body 11). ) Is tiltable in the front-back direction within a predetermined angle range.

The tilt angle of the frame 12 in the front-rear direction with respect to the mounting leg 13 is set by the front and rear walls 23a and 23b of the guide wall portions 23L and 23R. That is, when the leg portion 13a of the mounting leg 13 contacts the front wall portion 23a, the frame 12 is restricted from tilting forward with respect to the mounting leg 13 by a predetermined amount or more (a state indicated by a chain line in FIG. 3). . Further, the leg portion 13a comes into contact with the rear wall portion 23b, so that the frame 12 is restricted from tilting rearward with respect to the mounting leg 13 by a predetermined amount or more (FIG. 3).
State of the two-dot chain line).

As shown in FIGS. 6 and 7, the spacer 40 is incorporated into one of the guide wall portions 23L and 23R so that the frame 12 is tilted in the front-rear direction with respect to the mounting leg 13. Limited to small corners. That is, in the spacer 40, among the insertion holes 24,
The front wall portion 13a is inserted between the front wall portion 23a and the leg portion 13a, and the front wall portion 13a is moved substantially rearward to reduce the front-back displaceable width of the leg portion 13a in the insertion hole 24. It has become a thing.

The details of the spacer 40 are shown in FIGS. 8 to 13, and the attachment state of the spacer 40 to the headrest is shown in FIGS.
It is shown in FIG. First, the spacer 40 will be described in detail. The spacer 40 includes a thin plate-shaped base portion 41,
A central protrusion 42 protruding upward from the base portion 41,
It has a pair of left and right lateral projections 43 with the central projection 42 interposed therebetween. A plurality of whisker-shaped protrusions 43a are vertically spaced from each other on the outer side surface of the lateral protrusion 43 (in the embodiment, 2).
One) is formed. Further, an engaging projection 44 is further projected upward from an intermediate portion of the central projection 42 in the left-right direction, and an upper end portion of the engaging projection 44 serves as an engaging claw 44a. Has been done. Spacer 4 like this
0 is an integrally molded product obtained by injection molding a synthetic resin as a whole.

As is apparent from FIGS. 5 to 7, the base portion 41 has a lower opening end surface of the insertion hole 24, more specifically, a lower surface of the front wall portion 23a of the guide wall portion 23L. The size is set such that the front side portion of the pair of side wall portions 23c is seated. When the base portion 41 is seated on the lower surface of the guide wall portion 23L, the central protrusion portion 42 is inserted into the insertion hole 24, and the pair of left and right side protrusion portions 43 is the lower surface of the pair of left and right side wall portions 23c. It is inserted into the concave portion 26 that opens in the.

In this inserted state, the central projection 42 is fitted into the insertion hole 24 without rattling so that the central projection 42 contacts almost the entire inner surface of the front wall 23a and the front half of the inner surface of each side wall 23c. It is in a combined state. Then, the locking claw portion 44
a is locked to the upper opening end surface of the insertion hole 24, more specifically, to the upper surface of the front wall portion 23a of the guide wall portion 23L, and
The stopper 40 is prevented from coming off the frame 12. In addition, the beard-shaped protrusions 43a have the lateral protrusions 43 in the recess 26.
When it is inserted into the inside, the recess 2 is forcibly elastically deformed.
6 and is inserted into the concave portion 26 by the locking action of the whiskers 43a with respect to the inner surface of the concave portion 26.
The removal of the support 40 from the frame 12 is more firmly prevented. In particular, it is preferable for preventing the spacer 40 from falling off the frame 12 due to the vibration that the whiskers 43a absorb the vibration during traveling.

The central projection 42 has a width (see FIG. 11).
(FIG. 13 width in the left-right direction) is considerably increased, but a recess 42a is formed in the central protrusion 42 in order to reduce the weight and prevent deformation due to sink marks during molding. A plurality of the concave portions 42a are formed at intervals in the longitudinal direction of the base portion 41, and are opened on the bottom surface side of the base portion 41, respectively.

Although the embodiment has been described above, the present invention is not limited to this, and includes the following cases, for example. (1) As a structure for rotatably connecting the mounting leg 13 to the frame 12, an appropriate structure known in the related art can be adopted. Of course, the mounting leg 13 may have one leg portion 13, and the leg portion 13a is not limited to a circular cross section but may be a plate shape or the like.

(2) The spacer 40 has the insertion holes 2 on both the left and right sides.
4 (both guide wall portions 23L, 23R) may be provided (more reliable tilt angle limitation). Also,
The spacer 40 may be inserted between the rear wall portion 23b and the leg portion 13a in the insertion hole 24. (3) The spacer for limiting the tilting angle of the frame 12 with respect to the mounting leg 13 can have an appropriate structure. For example, a member attached to the outer periphery of the leg portion 13a of the attachment leg 13, for example, a winding structure may be used to reduce the play distance in the front-rear direction of the leg portion 13a in the insertion hole 24. (4) The spacer for limiting the tilt angle can be provided at an appropriate position such as a position distant from the insertion hole 24, but it is eccentric as much as possible from the center of rotation of the mounting leg 13 with respect to the frame 12. It is preferable to install it at the above position in order to effectively limit the tilt angle. (5) The limitation of the tilt angle by the spacer may be such that the tilt angle is zero. Further, the spacer for limiting the tilt angle may be fixed to the frame 12 or the mounting leg 13 by using a separate fixing tool such as a screw. (6) The headrest to which the present invention is applied may be for a rear seat of an automobile, or may be for a seat of a vehicle other than the automobile. Can be used for the sheet. (7) The object of the present invention includes what corresponds to the contents described as a substantially preferable embodiment or advantage, and is not limited to the headrest itself, but for providing a seat including the headrest or for limiting the tilt angle. The provision of a spacer is also implicitly included as an object of the invention.

[Brief description of drawings]

FIG. 1 is a side view showing an example of a headrest together with a seat.

FIG. 2 is a view of the frame and mounting legs of the headrest as viewed from the rear thereof.

FIG. 3 is a view of a frame of the headrest and mounting legs as viewed from the side thereof.

FIG. 4 is a sectional view corresponding to a line X4-X4 in FIG. 2, showing a pivotal connection portion between a frame of the headrest and mounting legs.

FIG. 5 is a view of the insertion hole portion of the frame through which the mounting leg is inserted, as viewed from below.

6 is a cross-sectional view taken along line X6-X6 of FIG. 5, showing an example of mounting a spacer for limiting the tilting angle of the frame with respect to the mounting legs.

FIG. 7 is a cross-sectional view of an essential part showing a structure for attaching a spacer to a frame.

FIG. 8 is a front view showing an example of a spacer.

FIG. 9 is a top view of FIG. 8;

FIG. 10 is a bottom view of FIG.

11 is a left side view of FIG.

12 is a cross-sectional view taken along line X12-X12 of FIG.

13 is a cross-sectional view corresponding to line X13-X13 of FIG.

[Description of sign]

 1: Seat 4: Seat back 10: Headrest 11: Cushion body 12: Frame 13: Mounting legs 23L, 23R: Guide wall portion 23a: Front wall portion 23b: Rear wall portion 23c: Side wall portion 24: Insertion hole 26: Recessed portion 40 : Spacer 41: Base part 43: Side protrusion 43a: Whisker-like protrusion 44: Locking protrusion 44a: Locking claw

Claims (6)

[Claims] 1. A cushion body, a frame disposed in the cushion body, and a mounting leg having one end rotatably mounted on the frame and the other end extending to the outside of the cushion body. A headrest device in which the tilt angle of the cushion body with respect to the mounting leg in the front-rear direction is changed within a predetermined angle range by changing the rotational angular position of the mounting leg with respect to the frame, A headrest device, characterized by comprising a spacer formed separately from the mounting leg and acting on the frame and the mounting leg to limit the tilt angle to a range smaller than the predetermined angle range. . 2. The frame according to claim 1, wherein the frame has a guide wall portion which defines an insertion hole through which the mounting leg is inserted and which has a width larger than an outer shape of the mounting leg in the front-rear direction, When the mounting leg comes into contact with the front wall portion of the guide wall portion, the forward tilting of the cushion body is regulated more than a predetermined amount, and the mounting leg comes into contact with the rear wall portion of the guide wall portion. The tilting of the cushion body to the rear by a predetermined amount or more is restricted by the spacer, and the spacer is inserted between the front wall portion and the mounting leg or between the rear wall portion and the mounting leg, A headrest device, characterized in that the distance between the front wall portion and the rear wall portion is substantially reduced. 3. The guide wall according to claim 2, wherein the spacer is seated on an end surface of the guide wall portion on one end side, and extends from the base portion into the insertion hole. And a locking claw that is locked to the other end side end surface of the headrest device. 4. The frame according to claim 3, wherein the frame is formed by injection molding synthetic resin,
The guide wall portion is integrally formed, and the left and right side wall portions of the guide wall portion are formed with a pair of left and right recesses so as to open to the end surface on the one end side, and the base portion of the spacer is formed. A pair of left and right protrusions to be inserted into the recess, and the left and right protrusions are strongly abutted against the inner wall surface of the recess when the protrusion is inserted into the recess. A headrest device, characterized in that a whisker portion is formed to prevent it from falling and being deformed. 5. The recess according to claim 4, wherein the concave portion formed in the frame prevents the guide wall portion from being partially thickened and is configured to prevent deformation of the frame after molding. The headrest device is characterized in that 6. The headrest device according to any one of claims 3 to 5, wherein the spacer is an integrally molded product made of synthetic resin as a whole.