JP6695818B2 - Front tilt type headrest device - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a headrest device for a vehicle, and particularly to a forward-tilting headrest device that can be tilted forward on a seat back when not in use.

  A headrest is usually provided on a seat back of a seat of an automobile, and is used so that the headrest supports the head of an occupant sitting on the seat from behind. The headrest on the seat back of an automobile is usually mounted not only on the front seat but also on the seat back of the back seat so as to support the head of an occupant in the back seat from the rear.

  However, since the headrest of the rear seat is usually provided so as to project above the seatback, when the driver of the front seat looks backward when traveling backward, it hinders the rear view. For this reason, it is desirable that the headrest of the rear seat does not protrude above the seatback in order to secure a rear view when not used. Therefore, conventionally, a headrest having a structure in which a headrest stay is rotatably supported so that the headrest changes from an upright state to a forward tilted state when the headrest is not used is proposed in Patent Document 1 below.

JP, 2011-36540, A JP, 2005-112975, A

  However, this forward-folding type headrest has a headrest stay pivoting mechanism provided in a mounting portion provided at an upper portion of a seat back, and a lower end portion of the headrest stay is pivotally supported so as to be vertically pivotable. For this reason, the rotating mechanism of the headrest stay is complicated and large, and a slit is formed in the upper part of the seatback along the rotational trajectory of the headrest stay. Therefore, there is a problem that the inside is exposed from the slit, the appearance of the seat back is deteriorated, and foreign matter easily enters the slit. Further, the conventional forward tilt type headrest has a problem that the manufacturing cost increases because the rotating mechanism is complicated, the number of parts is large, and the man-hour in the manufacturing process increases.

  Therefore, the applicant of the present application has proposed, in Patent Document 2, a forward-folding headrest in which the headrest stay is provided with a rotating mechanism having a simple structure. When the headrest main body is pivotally attached to the mounting portion provided on the upper portion of the seat back of this forward-tilting type headrest so as to be pivotable up and down, and the headrest body is pivotally operated with respect to the shaft portion of the stay, The headrest body is rotated and stopped by the action of the pair of leaf springs and the cam member. At this time, the rotation mechanism of the front-rest-type headrest rotates and stops the headrest body with a moderation feeling between the standing position and the front-tilt position.

  However, although this forward-tilting headrest has a relatively small number of parts and can be manufactured at low cost, it requires pivoting operation both between the upright position and the forward-tilting position, so when the headrest is not in use. For example, there has been a demand for a forward-folding headrest that rotates to a forward-tilting position and stops with a simpler operation.

  The present invention is to solve the above-mentioned problems, has a simple structure, can reduce the manufacturing cost, and is a simpler operation for rotating between a forward tilted position and an upright position. The purpose is to provide.

The forward-tilting headrest device according to the present invention,
A stay on both sides to be inserted into the upper part of the seat back and a base member provided in a pad member covered with a pad cover are provided, and the base member is attached to a shaft portion provided at an intermediate portion of the stay on both sides. In a forward-tilting type headrest device which is mounted so as to be capable of standing rotation and forward rotation,
Bearing portions provided on both side walls of the base member and rotatably supporting the base member with respect to the shaft portion;
A cam member fixed to the shaft portion in the base member and provided with an arcuate cam groove at an outer peripheral position of the shaft portion;
An operation pin slidably inserted and supported in a shaft hole provided in the base member;
A flange portion that is provided on the outer peripheral portion of the operation pin and that can be fitted into the large-diameter cam groove provided in the cam groove;
A spring member for urging the operation pin so that the flange portion fits into the large diameter cam groove,
A torsion spring member that is externally fitted to the shaft portion in the base member and biases the base member in the forward tilting direction with respect to the shaft portion;
Equipped with
One of the shaft holes formed in the side wall of the base member for supporting the operation pin is formed as a large diameter shaft hole, and a spring seat member is fitted into the large diameter shaft hole from the outside. The spring seat member is internally provided with a shaft support portion of the operation pin and a spring seat, the operation pin in the base member is externally fitted with the spring member, and the spring member abuts the spring seat,
When the base member is rotated with respect to the shaft portion to the upright position, the flange portion and the operation pin slide due to the urging force of the spring member, and the flange portion fits into the large-diameter cam groove. When the base member stops with respect to the shaft portion and the operating pin is slid to disengage the flange portion from the large-diameter cam groove, the base member is urged by the torsion spring member. It is characterized by turning to the forward tilted position.

According to this invention, when the base member in the forward tilted position is pivotally operated to the upright position, the flange portion engages with the large-diameter cam groove of the cam groove, and the base member stops at the upright position. Further, when the operation pin slides against the biasing force of the spring member when the base member is in the upright position, the flange portion comes off the large-diameter cam groove, and the biasing force of the torsion spring member causes the base member to move against the shaft portion. Since the base member is rotated to the forward tilt position, the base member, that is, the headrest can be rotated from the forward tilt position to the standing position by a simple operation. Further, the rotating operation mechanism for rotating the base member can be easily configured with a small number of parts, and the base member, that is, the headrest can be easily moved forward by simply sliding the operation pin at the standing position. It can be rotated to a position. Further, at the time of assembly, the operation pin can be easily assembled in the base member so that the end portion of the operation pin is supported by the shaft support portion and the end portion of the spring member is brought into contact with the spring seat. Will be very good.

  Here, the base member is composed of a first base member and a second base member formed by bending a metal plate into a substantially U shape, and each of the first base member and the second base member has a substantially half shape. A semi-bearing portion having a circular opening is provided, and when the first base member and the second base member are assembled to the shaft portion of the stay, the semi-bearing portion is combined to form the bearing portion on the base member. Can be configured. According to this, in the state where the cam member is fixed to the shaft portion and the torsion spring member is externally fitted to the shaft portion, it is only necessary to assemble the first base member and the second base member from the outside of the shaft portion. It can be easily assembled so as to be rotatable with respect to the shaft portion.

  ADVANTAGE OF THE INVENTION According to the forward tilt type headrest device of the present invention, the headrest can be favorably rotated between the standing position and the forward tilt position in the use state, and the headrest in the standing state can be simply pushed. Can be easily rotated to the forward tilted position. Further, the rotation operation mechanism for rotating the headrest between the upright position and the forward tilted position can have a simple structure, and can be manufactured inexpensively with a small number of parts and a small number of assembly steps.

It is a front view of the front fall type headrest device showing one embodiment of the present invention. FIG. 3 is a rear view of the front-back-type headrest device. FIG. 3 is a plan view of the front-back-type headrest device. FIG. 3 is an exploded perspective view of the front-turning headrest device. It is an exploded perspective view of a headrest stay, a base member, and a torsion spring member. It is an exploded perspective view of a shaft part, a cam member, an operation pin, a flange part, and a spring member. It is a left side view of a headrest device in a standing position. It is sectional drawing of the headrest apparatus of an upright position. It is a left side view of the headrest device in a forward tilted position. It is sectional drawing of the headrest device of a forward tilt position. It is a perspective view of the headrest device of a standing position. It is a perspective view of the headrest device in a forward tilted position. It is a front view of the headrest of the standing position in a use form. FIG. 7 is a left side view of the headrest in a forward tilted position in a usage pattern. It is a left side view of a headrest of a standing position in a use form.

  An embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 14 and 15, this forward-tilting headrest device is provided in a headrest H that is mounted on a seat back S of a seat of an automobile via a stay 2. The rotation operation mechanism of the headrest H is configured to rotate the headrest H between the standing position of FIG. 15 and the forward tilted position of FIG.

  The headrest stay 1 is formed by bending a single metal pipe into a substantially U-shape, and the end portions on both sides extend downward from the shaft portion 3 as a pair of stays 2. The shaft portion 3 of the horizontal portion of the headrest stay 1 is bent with respect to the stays 2 on both sides so as to project forward, and is continuously formed with the stays 2. The pair of stays 2 may be formed separately from the shaft portion 3, and may be connected and attached at the time of assembling. Here, the front, back, up, down, left and right used in the specification are based on the front view when the seat in the vehicle is viewed from the front, as shown in FIGS.

  A box-shaped base member 5 is rotatably mounted on a shaft portion 3 of the headrest stay 1, and a pair of stays 2 are laterally extended from the shaft portion 3 so as to project downward. As shown in FIGS. 14 and 15, the base member 5 is formed in a box shape and is disposed in the pad member 8 of the headrest H, and can be tilted back and forth around the shaft portion 3, that is, from the standing position to the forward tilted position. The base member 5 is rotatably attached. As shown in FIGS. 14 and 15, the pad member 8 is made of a soft cushion material, foamed synthetic resin, or the like, and a pad cover covers the pad member 8 and covers the pad member 8. The pad member 8 of the headrest H rotates together with the base member 5 on the shaft portion 3 from the standing position to the forward tilted position.

  As shown in FIGS. 1 to 3, the forward-tilting headrest device includes stays 2 on both sides to be inserted into an upper portion of a seat back, and a rectangular box-shaped base member 5 provided in a pad member 8 covered with a pad cover. The rotation operation mechanism of the base member 5 is rotatably supported between the upright position and the forward tilt position with respect to the shaft portion 3 horizontally provided in the middle portion of the stays 2 on both sides. As shown in FIGS. 13 and 14, when the operation pin 10 is pushed in the upright position, the base member 5 is automatically rotated to the forward tilted position by the biasing force of the torsion spring member 16.

  As shown in FIGS. 4 and 5, the base member 5 is configured by combining a first base member 6 and a second base member 7, which are formed by bending a metal plate into a substantially U shape. The side walls 6a of the first base member 6 and the side walls 7a of the second base member 7 are each provided with a substantially semicircular opening portion, and the half bearing portion 4a and the half bearing portion 4b are provided at the edges of each opening portion. Is provided. When the first base member 6 and the second base member 7 are assembled on the shaft portion 3 of the stay 2 to form the box-shaped base member 5, the half bearing portions 4a and 4b are combined to surround the periphery of the shaft portion 3. The bearing portion 4 is formed on the base member 5.

  The bearing portion 4 rotatably supports the base member 5 with respect to the shaft portion 3. A cam member 12 is provided in the base member 5 for rotating the base member 5 with respect to the shaft portion 3 within a predetermined angle range. The operation pin 10 is slidably fitted into shaft holes 6b and 6c provided in both side walls 6a of the first base member 6.

  The cam member 12 is fixed to the outer peripheral portion of the shaft portion 3 at right angles to the axial direction of the shaft portion 3 by welding or the like. As shown in FIGS. 4 and 5, in the cam member 12, a cam groove 13 is formed in an arc shape at the outer peripheral position of the shaft portion 3, and a large-diameter cam groove 14 is formed at the end portion of the cam groove 13. The flange portion 11 of the operation pin 10 can be fitted in the large-diameter cam groove 14, and when the flange portion 11 of the operation pin 10 is fitted in the large-diameter cam groove 14, the base member 5 is shown in FIG. So that it is held in the upright position. As shown in FIGS. 8 and 10, the cam groove 13 including the large-diameter cam groove 14 is formed in an angle range of about 60 degrees, and the base member 5 rotates around the shaft portion 3 in an angle range of about 60 degrees. It can be rotated with.

  As shown in FIGS. 4 and 6, the side wall 6a of the first base member 6 is provided with a shaft hole 6b and a large diameter shaft hole 6c so that the operation pin 10 can slide in the shaft hole 6b and the large diameter shaft hole 6c. Inserted and supported. As shown in FIG. 5, a spring seat member 15 is fitted into the large-diameter shaft hole 6c from the outside of the side wall 6a, a shaft support portion 15a is provided in the center of the spring seat member 15, and an operation pin is provided in the shaft support portion 15a. The ends of 10 are slidably supported. A spring seat 15b (FIGS. 4 and 5) is provided inside the spring seat member 15, and an end portion of the spring member <coil spring> 17 is in contact with and supported by the spring seat 15b. The spring member 17 fitted onto the outer peripheral portion of the operation pin 10 is held with a biasing force between the flange portion 11 formed on the operation pin 10 and the spring seat 15b.

  A flange portion 11 is integrally formed on the intermediate outer peripheral portion of the operation pin 10 by forging, and the flange portion 11 is formed so as to be fittable with a large-diameter cam groove 14 provided at an end portion of the cam groove 13. That is, the operation pin 10 held by the base member 5 is movably inserted into the cam groove 13, and the flange portion 11 causes the cam groove 13 to move as shown in FIG. 8 when the base member 5 is rotated to the upright position. When reaching the position of the large-diameter cam groove 14 provided at the end of the base member 5, the flange portion 11 is fitted into the large-diameter cam groove 14, and the upright position of the base member 5 is secured with a feeling of moderation.

  As shown in FIG. 5, the base member 5 is divided into a U-shaped first base member 6 and a second base member 7, and the base member 5 can be easily assembled when assembled to the shaft portion 3. Has become. That is, at the time of assembling, the semi-bearing portion 4a of the first base member 6 is fitted into the outer peripheral portion of the shaft portion 3 from the front side, and the semi-bearing portion 4b of the second base member 7 is supported from the back side to support the shaft portion 3. So that it fits in. The connecting joint portion between the first base member 6 and the second base member 7 is joined by welding or caulking, so that the base member 5 is formed in a box shape and is rotatably attached to the shaft portion 3. Be done.

  That is, when the base member 5 is rotatably attached to the shaft portion 3 of the stay 2, as shown in FIG. 5, the torsion spring member 16 is fitted to the outer peripheral portion of the shaft portion 3 and has a U-shape. The first base member 6 and the second base member 7 are fitted to the outer peripheral portion of the shaft portion 3, the half bearing portion 4a of the first base member 6 is fitted from the front, and the half bearing portion 4b of the second base member 7 is inserted from the rear side. The first base member 6 and the second base member 7 are connected by welding or caulking, etc.

  In this state, the bearing portion 4 of the base member 5 is in a state of rotatably supporting the shaft portion 3, the base member 5 is rotatably supported with respect to the shaft portion 3, and is disposed inside the base member 5. The cam member 12 and the torsion spring member 16 are arranged. One end of the torsion spring member 16 is locked to the edge of the cam member 12 on the side of the shaft 3, and the other end is locked to the edge of the first base member 6 as shown in FIG. 7. Due to the spring force of the torsion spring member 16, the base member 5 is attached to the shaft portion 3 while being urged clockwise in FIG.

  Further, as shown in FIG. 6, the operation pin 10, the flange portion 11, and the spring member 17 are mounted in the first base member 6 of the base member 5 while being engaged with the cam groove 13 of the cam member 12. These members function to rotate and stop the base member 5 between the upright position and the forward tilted position.

  As shown in FIG. 5, the side wall 6a of the first base member 6 of the base member 5 is provided with shaft holes 6b and 6c on both sides for supporting the operation pin 10. One of the shaft holes is formed as a large diameter shaft hole 6c, and the spring seat member 15 is fitted into the large diameter shaft hole 6c from the outside. The spring seat member 15 is internally provided with a shaft support 15a that supports the end of the operation pin 10, and a spring seat 15b is provided around the shaft support 15a. The spring member 17 is externally fitted to the operation pin 10 in the first base member 6, and the end of the spring member 17 abuts against the spring seat 15b to be mounted.

  Thereby, the operation pin 10 with the flange portion 11 and the spring member 17 are easily inserted from the outer side to the inner side of the base member 5, the operation pin 10 is inserted into the cam groove 13 of the cam member 12, and the flange portion 11 is cammed. These parts can be easily assembled so that they can be engaged with the groove 13. As shown in FIGS. 4 and 6, the flange portion 11 is provided with a large-diameter spring seat 11a, and the end of the spring member (coil spring) 17 externally fitted to the operation pin 10 contacts the spring seat 11a. The spring member 17 biases the flange portion 11 toward the cam groove 13 side.

  As shown in FIG. 11, the rotation operation mechanism of the base member 5 configured as described above has an operation pin when the base member 5 is manually rotated to the standing position against the torsion spring member 16. 10 moves in the cam groove 13, and when the flange portion 11 reaches the large diameter cam groove 14 at the end portion, the flange portion 11 and the operation pin 10 slide due to the urging force of the spring member 17, and the flange portion 11 Fits in the large-diameter cam groove 14. As a result, a click feeling is generated, and the base member 5 stops at the standing position with respect to the shaft portion 3 as shown in FIG. 11.

  Then, when the operation pin 10 is pushed axially against the spring member 17 at the standing position of the base member 5, the flange portion 11 is disengaged from the large-diameter cam groove 14, and the base member 5 is moved to the operation pin 10 and the flange portion. 11, and is rotated by the biasing force of the torsion spring member 16. As a result, as shown in FIG. 12, the base member 5 rotates to the forward tilted position and stops at the rotation end.

  As shown in FIGS. 13 to 15, the pad member 8 of the headrest H made of a soft cushion material, foamed synthetic resin, or the like is attached so as to cover the periphery of the base member 5 having the above configuration. The base member 5 is disposed in the headrest H together with the pad member 8 so as to be rotatable around the shaft portion 3 within a predetermined angular range (between the standing position and the forward tilted position). As shown in FIG. 13, both side portions of the shaft portion 3 project laterally from the pad member 8 and the stay 2 is extended downward in this state, so that the base member 5 and the pad member 8 are not connected to each other. It can be rotated around.

  As shown in FIG. 13, in order to push the operation pin 10 in the pad member 8, for example, a soft operation portion B is provided so as to be connected to the operation pin 10, and a part of the operation portion B is removed from the pad member 8. It is exposed. By pushing the operating portion B from the outside, the operating pin 10 is pushed and slides, and the headrest H rotates forward. The operation unit B can have any shape such as a button shape. The pair of stays 2 protruding downward are inserted into and supported by an insertion support portion (not shown) provided on the seat back S of the seat sheet of the automobile.

  When the headrest H including the base member 5 is in the upright position (FIGS. 13 and 15), when the operating portion B is pushed in and the operating pin 10 is pushed in, the operating pin 10 moves in the axial direction against the spring member 17, 12, the flange portion 11 is disengaged from the large-diameter cam groove 14, and the base member 5 is rotated in the clockwise direction in FIG. 14 together with the operation pin 10 and the flange portion 11 by the biasing force of the torsion spring member 16.

  As a result, the base member 5 and the headrest H rotate to the forward tilted position as shown in FIG. 14 and stop at the rotation end of the operation pin. In this way, the headrest H can be automatically rotated to the forward tilted position by a simple operation of merely pressing the operation portion B, that is, the operation pin 10. For example, when the present headrest device is applied to the headrest of the backseat of an automobile, the headrest H can be brought forward by a simple operation when the backseat is not used. The headrest of the rear seat can prevent the obstacle.

  On the other hand, when using the headrest H, the headrest H is rotated upward by a manual operation. At this time, as shown in FIG. 11, the base member 5 rotates from the forward tilted position on the shaft portion 3 against the torsion spring member 16 to the standing position. At this time, when the operation pin 10 moves in the cam groove 13 together with the flange portion 11 and the flange portion 11 reaches the large-diameter cam groove 14 at the end portion, as shown in FIG. The flange portion 11 and the operation pin 10 slide, and the flange portion 11 fits into the large diameter cam groove 14. As a result, a feeling of click (clicking) is generated in the headrest H, the base member 5 stops at the standing position with respect to the shaft portion 3 as shown in FIG. 11, and the headrest H returns to the used state as shown in FIG. .

  As described above, when the headrest H including the base member 5 is in the upright position, the operation portion B is pushed to slide the operation pin 10 against the urging force of the spring member 17, so that the flange portion 11 has a large-diameter cam. The base member 5 is disengaged from the groove 14 and rotated by the urging force of the torsion spring member 16 to the forward tilted position with respect to the shaft portion 3. Further, when the headrest H in the forward tilted position is manually operated and rotated to the standing position, the operation pin 10 moves in the cam groove 13, the flange portion 11 is fitted into the large-diameter cam groove 14, and the headrest H Stops at the upright position, the headrest H can be easily rotated from the forward tilted position to the upright position by a simple operation of pressing the operating portion B or manually operating the headrest H. Further, the rotating operation mechanism for rotating the base member 5 can be configured with a very small number of parts and a simple structure, the assembling work of each part is also easy, and the headrest device can be manufactured at low cost. it can.

  In the above-described embodiment, when the operation pin 10 is pushed while the base member 5 is in the upright position, the flange portion 11 is disengaged from the large diameter cam groove 14, and the biasing force of the torsion spring member 16 moves the base member 5 to the forward tilted position. Although it is configured to be urged to rotate and stop, contrary to the above, when the operation pin is pushed with the base member in the forward tilted position, the flange part comes out of the large-diameter cam groove and the torsion spring member is attached. The base member may be biased to the upright position by the force to rotate and stop. In this case, a large-diameter cam groove may be formed at the lower end of the cam groove, and the torsion spring member may have a structure that urges the base member in the counterclockwise direction in FIGS. 7 to 10.

1 Headrest stay 2 Stay 3 Shaft part 4 Bearing part 4a Half bearing part 4b Half bearing part 5 Base member 6 First base member 6a Side wall 6b Shaft hole 6c Large diameter shaft hole 7 Second base member 7a Side wall 8 Pad member 10 Operation pin 11 Flange 11a Spring seat 12 Cam member 13 Cam groove 14 Large diameter cam groove 15 Spring seat member 15a Shaft support 15b Spring seat 16 Torsion spring member 17 Spring member B Operation part H Headrest S Seat back

Claims (2)

A stay on both sides to be inserted into the upper part of the seat back and a base member provided in a pad member covered with a pad cover are provided, and the base member is attached to a shaft portion provided at an intermediate portion of the stay on both sides. In a forward-tilting type headrest device which is mounted so as to be capable of standing rotation and forward rotation,
Bearing portions provided on both side walls of the base member and rotatably supporting the base member with respect to the shaft portion;
A cam member fixed to the shaft portion in the base member and provided with an arcuate cam groove at an outer peripheral position of the shaft portion;
An operation pin slidably inserted and supported in a shaft hole provided in the base member;
A flange portion that is provided on the outer peripheral portion of the operation pin and that can be fitted into the large-diameter cam groove provided in the cam groove;
A spring member for urging the operation pin so that the flange portion fits into the large diameter cam groove,
A torsion spring member that is externally fitted to the shaft portion in the base member and biases the base member in the forward tilting direction with respect to the shaft portion;
Equipped with
One of the shaft holes formed in the side wall of the base member for supporting the operation pin is formed as a large diameter shaft hole, and a spring seat member is fitted into the large diameter shaft hole from the outside. The spring seat member is internally provided with a shaft support portion of the operation pin and a spring seat, the operation pin in the base member is externally fitted with the spring member, and the spring member abuts the spring seat,
When the base member is rotated with respect to the shaft portion to the upright position, the flange portion and the operation pin slide due to the urging force of the spring member, and the flange portion fits into the large-diameter cam groove. When the base member stops with respect to the shaft portion and the operating pin is slid to disengage the flange portion from the large-diameter cam groove, the base member is urged by the torsion spring member. A forward-tilting headrest device characterized by turning to the forward-tilting position.   The base member is composed of a first base member and a second base member formed by bending a metal plate into a substantially U shape, and each of the first base member and the second base member has a substantially semicircular opening. When the first base member and the second base member are assembled to the shaft portion of the stay, the half bearing portions are combined to form the bearing portion on the base member. The forward-tilting headrest device according to claim 1, which is characterized in that.

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