JP6166581B2 - Vehicle seat device - Google Patents

Description

  The present invention relates to an improvement in a vehicle seat device in which a dynamic damper is attached to a seat frame installed in a vehicle.

  Such a vehicle seat apparatus is known as disclosed in Patent Document 1 below.

JP-A-10-226255

  In the vehicle seat device disclosed in Patent Document 1, the dynamic damper includes a weight and a spring that has one end connected to the weight and the other end fixed to the frame with a bolt. As described above, when bolts are used for attaching the spring to the frame, a large number of bolts are required, so that a long time is required for the attachment work, which hinders reduction in the manufacturing cost of the seat device.

  The present invention has been made in view of such circumstances, and the vehicle seat is capable of attaching a dynamic damper to a frame very easily without using screws such as bolts and reducing the manufacturing cost. An object is to provide an apparatus.

In order to achieve the above object, the present invention provides a vehicle seat device in which a dynamic damper is attached to a frame of a seat installed on a vehicle, the dynamic damper being a weight, and the weight being an elastic member. The damper support body is divided into two parts, a part located on the front side and a part located on the rear side in the front-rear direction of the seat, and a part located on the rear side. A plurality of elastic support portions snap-engaged with the frame to hold the damper support, and the elastic support portions have a pushing direction for snap engagement with the frame, the front side of the seat the first feature to be configured to be the same direction toward the rear side from.

  According to the present invention, in addition to the first feature, the headrest frame includes first and second bone members arranged in parallel with each other, and a third bone member for connecting the first and second bone members, The damper support body is provided with a pair of elastic support portions that snap-engage with the first and second bone members, and the pair of elastic support portions are snap-engaged with the first and second bone members. The second feature is that the push-in direction for is directed from the outside to the inside of the headrest frame.

  In addition to the second feature of the present invention, the damper support body is engaged with and abutted against the third bone member, and the first and second elastic support portions are in contact with the first and second bone members. A third feature is that a positioning support portion for defining the snap engagement position is provided.

Furthermore, in addition to the third feature of the present invention, the damper support is constituted by a damper case composed of first and second case halves that are detachably coupled to each other. The weight wrapped with an elastic member is accommodated, and the elastic support portion and the positioning support portion are integrally formed on the case half located on the rear side of the first and second case half. Is the fourth feature.

  Furthermore, in addition to the fourth feature, the present invention provides that the elastic support portion and the positioning support portion include a pushing direction of the elastic support portion with respect to the first and second bone members, and the first position of the positioning support portion. A fifth feature is that the three bone members are configured to be pushed in the same direction.

According to the first feature of the present invention, the dynamic damper is composed of a weight and a damper support that supports the weight via an elastic member, and the damper support is snapped to the frame. In addition, since the plurality of elastic support portions for holding the damper support are provided, the damper support can be easily and easily attached to the seat frame without using screws. Moreover, a plurality of elastic support portion, so pushing direction for snap engagement into these said frame is configured to be the same direction, snap at once a plurality of elastic support portions on the frame of the seat This makes it possible to speed up the mounting work of the damper support.

  According to the second feature of the present invention, the headrest frame includes first and second bone members arranged in parallel to each other, and a third bone member for connecting the first and second bone members, and the damper support The body is provided with a pair of elastic support portions that snap-engage with the first and second bone members, and the pair of elastic support portions is used for snap engagement with the first and second bone members. Since the push-in direction of the headrest frame is directed from the outside to the inside of the headrest frame, the pair of elastic support portions are connected to the first and second bones of the headrest frame by pushing the damper support body from the outside to the inside of the headrest frame. The member can be snap-engaged at once.

  According to a third aspect of the present invention, the damper support is engaged with and abutted against the third bone member, and the first and second elastic support portions are snapped to the first and second bone members. Since the positioning support portion for defining the alignment position is provided, the fixed position of the damper support on the headrest frame can be easily determined.

According to a fourth aspect of the present invention, the damper support is constituted by a damper case composed of first and second case halves that are separably coupled to each other, and the damper case includes the elastic member. Since the wrapped weight is accommodated, the weight can be easily supported by the damper case via the elastic member. Moreover, the the first and case half located on the rear side of the second case half, since the formation of the elastic support portion and the positioning support part integrally, of the first and second case halves The elastic support portion and the positioning support portion can be formed at a stroke on the rear side . At that time, since although the shape of the case halves towards that having a resilient supporting member and the positioning support section becomes complicated, the shape of the other of the case halves is simplified, overall first and second case The half body can be easily molded.

  According to a fifth aspect of the present invention, the elastic support portion and the positioning support portion are formed by pressing the elastic support portion with respect to the first and second bone members, and the third bone member of the positioning support portion. Since the pushing direction of the elastic support portion is the same direction, the snap engagement of the elastic support portion with the first and second bone members and the engagement contact of the positioning support portion with the third bone member are performed. This can be done all at once, and the installation work of the damper support can be speeded up.

1 is a side view of a vehicle seat device according to a first embodiment of the present invention. The enlarged view of 2 parts (headrest periphery part) of FIG. FIG. FIG. 4 is a view taken in the direction of arrow 4 in FIG. 2. FIG. 5 is a sectional view taken along line 5-5 of FIG. FIG. 4 is a perspective view corresponding to FIG. 3. FIG. 7 is an exploded perspective view of the dynamic damper in FIG. 6. Explanatory drawing of the molding method by the foam material of the cushion member of a headrest. The front view corresponding to FIG. 3 which shows 2nd Embodiment of this invention. The perspective view of the headrest which shows the 1st reference form of this invention. The perspective view of the vehicle seat apparatus which shows 3rd Embodiment of this invention. The perspective view of the vehicle seat apparatus which shows 4th Embodiment of this invention. The perspective view of the vehicle seat apparatus which shows the 2nd reference form of this invention.

  First, the first embodiment of the present invention shown in FIGS. 1 to 8 will be described. In the following description, front and rear and left and right are based on a vehicle as a vehicle to which the present invention is applied.

  In FIG. 1, the automobile seat S includes a seat cushion 2, a seat back 3, and a headrest 4. The seat cushion 2 has a seat cushion frame 6 in which a plurality of support legs 7 and 7 are formed in the lower part, and the support legs 7 and 7 are fixed to the floor F of the automobile.

  A pair of left and right brackets 8 projecting upward are connected to the rear end portion of the seat cushion frame 6, and a seat back frame 10 included in the seat back 3 is connected to these brackets 8 via a pivot 9 so as to be reclining. .

  A pair of left and right support cylinders 11 are fixed to the upper end portion of the seat back frame 10, and the headrest 4 is supported by the support cylinders 11, 11 such that the headrest 4 can be raised and lowered.

  As shown in FIGS. 2 to 6, the headrest 4 is composed of a headrest frame 12, a cushion member 13 made of urethane foam supported by the headrest frame 12, and a skin 14 that covers the surface of the headrest frame 12. A dynamic damper D is attached to the frame 12.

  The headrest frame 12 is formed by bending a pipe material. The pair of left and right main bone members 12a, 12a supported by the pair of support cylinders 11, 11 and the upper ends of the main bone members 12a, 12a forward. The bent upper bone members 12b, 12b, the pair of left and right front longitudinal bone members 12c, 12c extending downward from the front ends of the upper bone members 12b, 12b, and the lower ends of the front longitudinal bone members 12c, 12c The front transverse bone member 12d is integrally connected to each other, and the left and right front longitudinal bone members 12c and 12c are welded so that a reinforcing cross bar 19 having a smaller diameter than the pipe material is bridged. Thus, the cushion member 13 is formed so as to wrap the headrest frame 12 from the upper part of the main bone members 12a, 12a to the front transverse bone member 12d, and the cushion member 13 is covered with the skin 14.

  Before the cushion member 13 is formed, the dynamic damper D is attached using the front longitudinal bone members 12c, 12c and the front transverse bone member 12d. The dynamic damper D includes a weight 15, a sheet-like elastic member 16 that wraps the weight 15 so as to overlap the outer surface, and a damper case 17 that accommodates the weight 15 and the elastic member 16.

  As shown in FIGS. 2, 5, and 7, the weight 15 is made of cast iron and has a hexahedron that is flat in the front-rear direction, and its front surface 15f is formed on a flat curved surface or a convex curved surface close thereto. The rear surface 15r is formed as a curved surface that protrudes larger than the front surface 15f. Further, the weight 15 is formed such that the thickness in the front-rear direction gradually increases upward, and the center of gravity G of the weight 15 occupies a position above the center C of the weight 15.

  The elastic member 16 is made of urethane foam, and is formed by projecting four sheet pieces 16b to 16e from a square central portion 16a corresponding to the rear surface 15r of the weight, and the weight 15 is wrapped by the elastic member 16. At this time, after placing the front surface 15f of the weight 15 on the central portion 16a of the elastic member 16, the four sheet pieces 16b to 16e are raised, and then folded to the rear surface 15r side of the weight 15, and then the front surface 15f. Are bonded to each other through a double-sided adhesive tape 18. The weight 15 thus wrapped with the elastic member 16 is accommodated in a front and rear split damper case 17. Thus, the weight 15 is supported by the damper case 17 via the elastic member 16.

  As shown in FIGS. 2 to 7, the damper case 17 has a shape similar to the outer shape of the weight 15, and thus has a flat box shape in the front-rear direction. The rear wall 17r is formed in a curved surface that is curved so as to largely protrude rearward corresponding to the rear surface 15r of the weight 15, corresponding to the front surface 15f of the weight 15.

The damper case 17 is divided into a first case half body 17A located on the front side and a second case half body 17B located on the rear side so that the weight 15 wrapped with the elastic member 16 can be accommodated. The case halves 17A and 17B are each molded from a synthetic resin. A square fitting groove 20 and a fitting projection wall 21 that can be fitted to each other are formed on one and the other of the opposing surfaces of both case halves 17A and 17B, respectively. Are formed with a plurality of connecting claws 22, 22... Projecting outward, and a plurality of connecting holes 23, 23. Formed.

  The first and second elastic support portions 24A and 24B are integrally formed on the left and right side walls of the second case half 17B. The first and second elastic support portions 24A and 24B are connected to the plate-like arms 25a and 25b projecting outward from the left and right side walls of the second case half body 17B, respectively, and the ends of the arms 25a and 25b. Then, the front longitudinal bone members 12c and 12c are constituted by dominant arc-shaped gripping claws 26a and 26b which can be snap-engaged so as to grip them. That is, the superior arc-shaped gripping claws 26a and 26b can elastically grip the front longitudinal bone members 12c and 12c beyond the respective half circumferences. The arcuate gripping claws 26a and 26b have the openings 27a and 27b directed rearward so as to engage the front longitudinal bone members 12c and 12c from the front. Therefore, the backward load from the occupant's head acts in the direction in which the gripping claws 26a, 26b of the first and second elastic support portions 24A, 24B are engaged with the front longitudinal bone members 12c, 12c. The detachment of the claws 26a and 26b can be prevented. Further, by selecting the lengths of the arms 25a and 25b, the distance between the centers of the gripping claws 26a and 26b is made to coincide with the distance between the centers of the frontal longitudinal bone members 12c and 12c, so that the front longitudinal bone members of the gripping claws 26a and 26b. Engagement with 12c and 12c can be performed accurately.

  The arcuate gripping claws 26a, 26b are formed so that their inner diameters D1, D2 are different from each other. In the illustrated example, the inner diameter D2 of the gripping claw 26b of the second elastic support portion 24B is set larger than the inner diameter D1 of the gripping claw 26a of the first elastic support portion 24A. The arcuate gripping claws 26a and 26b are formed so that their rigidity is different from each other. In the illustrated example, the gripping claw 26a of the first elastic support portion 24A is notched at the tip of the gripping claw 26a of the first elastic support portion 24A so that the rigidity of the gripping claw 26a of the first elastic support portion 24B is lower than that of the gripping claw 26b of the second elastic support portion 24B. 28 is provided, or the thickness of the gripping claw 26a is set thinner than that of the gripping claw 26b. The first and second elastic support portions 24A and 24B are disposed so as to sandwich the center of gravity G of the weight 15.

  Each gripping claw 26a, 26b is provided with a window hole 29, from which the engagement state between each gripping claw 26a, 26b and the front longitudinal bone member 12c, 12c can be visually confirmed. ing.

  Further, a positioning support portion 30 is integrally formed on the lower side wall of the second case half 17B. The positioning support portion 30 is connected to the plate-like arm 30a projecting downward from the lower side wall of the second case half 17B and the lower end of the arm 30a so as to contact and engage the front transverse bone member 12d. The U-shaped contact claw 30b is obtained, and the contact claw 30b engages and comes into contact with the front transverse bone member 12d from the front, so that the gripping claws 26a, 26b and the left and right front longitudinal bone members 12c are engaged. , 12c are defined. Thus, the mounting position of the damper case 17 on the headrest frame 12 is determined.

  The bases of the arms 25a, 25b, and 30a of the first and second elastic support portions 24A and 24B and the positioning support portion 30 are formed with a thickened portion 31 that reinforces the rigidity of the bases. (2) A pair of elastic supports 24A and 24B that abut against the arms 25a and 25b to bend forward, that is, to bend the arms 25a and 25b opposite to the openings 27a and 27b of the gripping claws 26a and 26b. Stoppers 32, 32 are formed on the left and right side walls of the first case half 17A. Each stopper 32 includes a central wall portion 32a that linearly contacts the back surface of the corresponding gripping claws 26a and 26b, and the arm 25a and 25b that are connected to both side ends of the central wall portion 32a, and the gripping claws 26a and 26b. And a pair of side wall portions 32b, 32b that contact the curved surface extending across the back surface of the lens. The stopper 32 having such a configuration has high rigidity and can secure a wide contact area with the back surface from the corresponding arm 25a, 25b to the gripping claws 26a, 26b, so that concentrated stress can be avoided as much as possible. The bending of 25a and 25b can be regulated effectively. Therefore, even if a large backward load acts on the damper case 17 from the occupant's head, the stoppers 32 and 32 come into contact with the front surfaces of the arms 25a and 25b to restrict the forward bending of the arms 25a and 25b. Thus, unnecessary rearward movement of the damper case 17 can be restricted.

  Further, since the stopper 32 is integrally connected to the outer wall of the fitting groove 20, it contributes to strengthening the rigidity of the outer wall of the fitting groove 20.

  The arm portion 30a of the positioning support portion 30 is formed with a plurality of reinforcing ribs 33 that connect the lower wall of the first case half 17A and the contact claw 30b.

  Next, a method of embedding the dynamic damper D in the headrest 4 will be described with reference to FIG.

  Formed on the lower surface of the machine base 35 are cavities 36 corresponding to the outer shape of the headrest 4 except for the headrest frame 12, and molds 37 a and 37 b that can be opened and closed up and down. The skin 14 of the headrest 4 is stretched.

  The skin 14 is provided with a foamable synthetic resin pouring port 38 opened on the upper surface thereof, and a support plate 39 fixed to the upper surface of the molding table 35 is provided with a nozzle guide cylinder inserted into the foaming material pouring port 38. 40 is provided. The support plate 39 is provided with a foam supply device 40 for inserting the nozzle 41 into the nozzle guide tube 40. Further, the main frame members 12 a and 12 a of the headrest frame 12 disposed in the nozzle guide tube 40 are supported by the bracket 43 provided on the support plate 39. Thus, in the skin 14, the dynamic damper D supported by the front longitudinal bone members 12 c and 12 c of the headrest frame 12 is arranged offset to one side of the foam material inlet 38.

  Thus, a foam material 44 such as urethane is injected from the foam material supply device 40 through the nozzle 41 into the bag-shaped skin 14 that is in close contact with the inner surface of the cavity 36 and foamed to form a headrest frame in the skin 14. 12 and the cushion member 13 that encloses the dynamic damper D can be formed. At that time, the dynamic damper D supported by the front longitudinal bone members 12c, 12c is arranged offset to one side of the foam material inlet 38, so that the foam material 44 is poured into the foam material inlet 38. The pressure does not directly act on the dynamic damper D. Therefore, there is no concern about the elastic dampers 24A, 24B of the dynamic damper D being detached from the front longitudinal bone members 12c, 12c due to the pouring pressure. Further, when the first and second case halves 17A and 17B are joined, the mating groove 20 and the fitting projecting wall 21 on the opposite surfaces are fitted to each other, so that the foam material 44 is formed in both case halves 17A. , 17B can be reliably prevented by the labyrinth effect, and an appropriate vibration damping function of the dynamic damper D can be maintained.

  The headrest 4 thus manufactured can be taken out of the mold by opening the molds 37a and 37b up and down.

  The operation of the first embodiment will be described.

  In assembling the dynamic damper D, the weight 15 wrapped with the elastic member 16 as described above is fitted into the first case half 17A or the second case half 17B of the damper case 17, and then both the case halves 17A. , 17B, when the fitting projection wall 21 of the other opening is inserted deeply into the fitting groove 20 of one opening, the coupling claws 22, 22 ... and the locking holes 23, 23 ... By engaging, both case halves 17A and 17B can be easily connected without using screws, and at the same time, the weight 15 is supported by the damper case 17 via the elastic member 16 in all directions. Can do.

  In attaching the assembled dynamic damper D to the headrest frame 12, first, the grip claws 26a, 26b of the first and second elastic support portions 24A, 24B are attached to the left and right front longitudinal bone members 12c, 12c of the headrest frame 12, respectively. Further, after the positioning support portion 30 is made to face the front transverse bone member 12d, and the damper case 17 is pushed from the front to the rear, the snapping engagement of the gripping claws 26a and 26b to the front longitudinal bone members 12c and 12c and the positioning are performed. The engagement contact of the support portion 30 with the front transverse bone member 12d can be performed at once. Therefore, the damper case 17 can be easily and easily attached to the headrest frame 12 without using screws, and the left and right front longitudinal bone members 12c, There is no need to apply special processing to 12c.

  At that time, the inner diameter D2 of the gripping claw 26b of the second elastic support portion 24B is set larger than the inner diameter D1 of the gripping claw 26a of the first elastic support portion 24A, and the gripping claws 26a and 26b have different rigidity. Therefore, the manufacturing error between the distance between the centers of the left and right front longitudinal bone members 12c, 12c and the distance between the centers of the left and right gripping claws 26a, 26b is absorbed by relatively little elastic deformation of the left and right gripping claws 26a, 26b. Accordingly, both the gripping claws 26a and 26b can be easily and reliably attached to both the front longitudinal bone members 12c and 12c regardless of the manufacturing error.

  By the way, in one of the first and second case halves 17A and 17B constituting the damper case 17, in the illustrated example, not only the first and second elastic support portions 24A and 24B but also the second case halves 17B are positioned. Since the support portion 30 is integrally formed, the shape of the second case half body 17B having the first and second elastic support portions 24A and 24B and the positioning support portion 30 is complicated, but the other first case half body is formed. The shape of 17A is simplified, and the first and second case halves 17A and 17B can be easily formed comprehensively.

  When the vehicle is running, when the weight is transmitted from the floor F of the vehicle to the seat back 3 and the headrest 4 via the seat cushion 2 and the pivot 9, the weight 22 resonates with the elastic deformation of the elastic member 16 in the dynamic damper D, The vibration energy of the seat back 3 and the headrest 4 is absorbed and replaced, and the seat back 3 and the headrest 4 can be damped.

  At that time, since the vibration of the weight 15 is suppressed from being transmitted to the cushion member 13 by the damper case 17, the passenger does not feel uncomfortable.

  Further, since the first and second elastic support portions 24A and 24B are arranged so as to sandwich the center of gravity G of the weight 15, the vibration impact force of the weight 15 is stably supported via the second case half body 17B. can do.

  Further, the weight 15 is formed such that its center of gravity G is located above the center C of the weight 15, so that the center of gravity G of the weight 22 is from the support point of the vibration system composed of the seat cushion 2 and the headrest 4. Therefore, the vibration damping function of the dynamic damper D can be provided with the weight 22 having a relatively small mass.

  The damper case 17 has a box shape that is flat in the front-rear direction corresponding to the outer shape of the weight 15, and its front wall 17 f is formed in a flat surface or a curved surface close to the front surface 15 f of the weight 15. The rear wall 17r is formed in a curved surface that is curved to be larger than the front wall 17f with the convex side facing rearward corresponding to the rear surface 15r of the weight 15, so that the occupant's head is placed on the damper via the cushion member 13. Even when strongly pressed against the front wall 17f of the case 17, the head of the occupant is supported by a relatively large area of the front wall 17f of the damper case 17, so that the occupant does not feel uncomfortable. On the other hand, the rear surface 17r of the weight 15 and the damper case 17 which are greatly curved allow the thickness of the weight 15 to be increased by effectively using the space in the headrest 4, and the vibration damping function of the dynamic damper D can be reduced. Can contribute to improvement.

  Next, a second embodiment of the present invention shown in FIG. 9 will be described.

  In the second embodiment, the damper case 17 is formed such that three or more elastic support portions 24 </ b> A to 24 </ b> C supported by the headrest frame 12 are positioned at the apex of the polygon 34 surrounding the gravity center G of the weight 15. Specifically, the damper case 17 is formed so that the three first to third elastic support portions 24A to 24C are arranged at the three vertices of the inverted triangle 34, and the region of the inverted triangle 34 is formed. The weight 15 is formed so that the center of gravity G of the weight 15 is located. Similar to the first and second elastic support portions 24A and 24B, the third elastic support portion 24C is integrally formed with the second case half body 17B, and the configuration thereof is also the first and second elastic support portions. Similarly to 24A and 24B, it is composed of an arm 25c and a dominant arc-shaped gripping claw 26c.

  Thus, when the damper case 17 is attached to the headrest frame 12, the first and second elastic support portions 24A are pushed by pushing the damper case 17 from the front to the rear of the headrest frame 12, as in the previous embodiment. , 24B can be snap-engaged to the left and right front longitudinal bone members 12c, 12c, and the third elastic support member 24C can be snap-engaged to the front transverse bone member 12d.

  Since other configurations are the same as those of the previous embodiment, portions corresponding to those of the previous embodiment in FIG. 9 are denoted by the same reference numerals, and redundant description is omitted.

  According to the second embodiment, the damper case 17 is formed such that three or more elastic support portions 24A to 24C supported by the headrest frame 12 are positioned at the apex of the polygon 34 surrounding the gravity center G of the weight 15. As a result, the vibration impact force of the weight 15 is distributed substantially uniformly to all of the elastic support portions 24A to 24C via the damper case 17, so that the vibration of the damper case 17 is effectively suppressed and the ride comfort is improved. Can contribute to improvement.

Next, a first reference embodiment of the present invention shown in FIG. 10 will be described.

In the first reference embodiment, the dynamic damper D in the first embodiment is attached to the left and right upper bone members 12b, 12b of the headrest frame 12. That is, the first and second elastic support portions 24A and 24B of the damper case 17 are snap-engaged with the left and right upper bone members 12b and 12b from above, and the positioning support portion 30 is connected to the left and right upper bone members 12b and 12b. It engages and abuts from above on the cross member 46 that connects the rear ends. Therefore, the damper case 17 can be positioned and attached to the headrest frame 12 by pushing the damper case 17 downward from above the headrest frame 12.

  Since other configurations are the same as those of the first embodiment, portions corresponding to those of the first embodiment in FIG. 10 are denoted by the same reference numerals, and redundant description is omitted.

According to the first reference embodiment, the space between the left and right upper bone members 12b, 12b is effectively utilized for the installation of the dynamic damper D, so that the front portion of the cushion member 13 of the headrest 4 where the head of the occupant contacts To secure a sufficient thickness, and to obtain a sufficient distance from the support point of the vibration system composed of the seat cushion 2 and the headrest 4 to the center of gravity G of the weight 22, thereby enhancing the vibration damping function of the dynamic damper D. it can.

Next, a third embodiment of the present invention shown in FIG. 11 will be described.

In the third embodiment, in the seat back 3, a dynamic damper D including a damper case 17 having a substantially right triangle shape in front view is disposed at the inner corners of the left and right corners at the top of the seat back frame 10, A pair of elastic support portions 24A and 24B formed on the upper surface and one side surface of the damper case 17 are snap-engaged with the longitudinal bone member 10a and the lateral bone member 10b of the seat back frame 10, respectively. Also in this case, the pair of elastic support portions 24A and 24B can be snap-engaged with the seat back frame 10 at once by pushing the damper case 17 backward . The structure of the dynamic damper D is basically the same except that the shape of the damper case 17 and the weight 15 accommodated therein is different from that of the first embodiment.

According to the third embodiment, the vibration of the seat back 3 can be effectively suppressed by the action of the dynamic damper D disposed at the top of the seat back frame 10. In addition, the dead space at the inner corner of the upper corner of the seat back frame 10 can be effectively used for the installation of the dynamic damper D. The dynamic damper D may be disposed only at the inner corner of either the left or right corner of the upper portion of the seat back frame 10.

Next, a fourth embodiment of the present invention shown in FIG. 12 will be described.

In the fourth embodiment, a pair of inclined bone portions 49a, 49a inclined in opposite directions at the center of a corrugated bone member 49 that integrally connects the upper portions of the left and right vertical bone members 10a, 10a of the seat back frame 10. In addition, a pair of elastic support portions 24A and 24B formed on the left and right side surfaces of the damper case 17 are snap-engaged. At that time, the pair of elastic support portions 24A and 24B are disposed obliquely corresponding to the pair of inclined bone portions 49a and 49a, and thereby the pair of elastic support portions 24A and 24B are paired with the pair of inclined bone portions 49a and 49a. Vertical movement at is prevented. Also in this case, the pair of elastic support portions 24 </ b> A and 24 </ b> B can be snap-engaged to the corrugated bone member 49 at once by pushing the damper case 17 backward . The basic structure of the dynamic damper D is the same as that of the first embodiment. Thus, the vibration of the seat back 3 can be effectively suppressed by the action of the single dynamic damper D attached to the upper portion and the center portion of the seat back frame 10.

Finally, a second reference embodiment of the present invention shown in FIG. 13 will be described.

In the second reference embodiment, for damping the seat cushion 2, the damper case 17 of the dynamic damper D is attached to the front reinforcing plate 6a that is welded to the front portion of the seat cushion frame 6 and extends in the left-right direction. In this case, the damper case 17 has a pair of elastic support portions 50, 50 formed on the upper surface thereof. Each elastic support portion 50 includes a shaft portion 50a protruding from the outer surface of the damper case 17 and an arrowhead-like locking projection 50b formed at the tip of the shaft portion 50a. A slit 50c is provided in the shaft portion 50a from the tip of the locking projection 50b so as to enable a small diameter reduction. A rubber elastic collar 52 is fitted on the shaft portion 50a. On the other hand, the front reinforcing plate 6a is provided with a pair of locking holes 51, 51 corresponding to the pair of elastic support portions 50, 50. The elastic support portions 50, 50 are formed in the locking holes 51, 51, respectively. By pushing the locking projections 50b from below, each locking projection 50b is not elastically reduced in diameter, but after passing through the corresponding locking hole 51, the diameter is expanded to the original shape, that is, snap-engaged and locked. Separation from the hole 51 is prevented. At that time, the elastic collar 52 fitted to the shaft portion 50a is compressed between the front reinforcing plate 6a and the damper case 17, and due to the repulsive force, the locking projection 50b is loosely placed on the front surface of the front reinforcing plate 6a. It is kept without. Therefore, also in this case, by pushing the damper case 17 in one direction, the pair of elastic support portions 50, 50 can be snap-engaged to the front reinforcing plate 6a at a stroke.

  Other than the elastic support portions 50, 50, the structure of the damper case 17, the weight 15 accommodated in the damper case 17, and the elastic member 16 enclosing it is basically the same as that of the first embodiment. Therefore, in FIG. 13, the same reference numerals are assigned to the portions corresponding to those of the first embodiment, and the overlapping description is omitted.

According to the second reference embodiment, the vibration of the seat cushion 2 can be effectively suppressed by the action of the dynamic damper D disposed at the front end portion of the seat cushion frame 6. Moreover, the dead space below the front reinforcing plate 6a at the front end of the seat cushion frame 6 can be effectively used for the installation of the dynamic damper D, and the elastic support portions 50, 50 can be attached to the front reinforcing plate 6a by a simple pushing operation. It is possible to snap-engage with the locking holes 51, 51, and the damper case 17 can be easily attached.

The present invention is not limited to the above embodiment, and various design changes can be made without departing from the scope of the invention. For example, the third and fourth embodiments can be used in combination with the first and second embodiments. Further, one of the first and second half bodies 17A and 17B constituting the damper case 17 can be formed in a box shape having an opening, and the other can be formed in a lid shape for closing the opening. The seat device of the present invention is not limited to automobiles but can be applied to railway vehicles, aircrafts, and the like. The seat S can also be installed overhanging from the wall surface of the vehicle.

D ··· Dynamic damper S · · · Seat 6 · · · Frame (seat cushion frame)
10. Frame (seat back frame)
12. Frame (headrest frame)
12b .... First bone member (upper bone member)
12c... Second bone member (front longitudinal bone member)
12d ··· Third bone member (front transverse bone member)
15 ... Weight 16 ... Elastic member 17 ... Damper support (damper case)
24A, 24B, 24C ... elastic support portion 30 ... positioning support portion 46 ... third bone member (cross member)
50 .. Elastic support part

Claims (5)

In a vehicle seat apparatus comprising a dynamic damper (D) attached to a frame (10, 12) of a seat (S) installed on a vehicle,
The dynamic damper (D) includes a weight (15) and a damper support (17) that supports the weight (15) via an elastic member (16), and the damper support (17) Is divided into a part (17A) located on the front side and a part (17B) located on the rear side in the front-rear direction of the seat (S), and the frame (1 ) is formed on the part (17B) located on the rear side. a plurality of elastic support portions (24A to be held in 0,12) snap engagement with the damper support the (17), 24B, 24 C) to provided, the elastic supporting portion (24A, 24B, 24 C) is pushing direction for snap engagement into these said frame (1 0,12), characterized in that is configured to be the same direction from the front side to the rear side of the sheet (S), Vehicle seat device. The vehicle seat device according to claim 1,
A headrest frame (12) connects the first and second bone members (12b, 12b; 12c, 12c) arranged in parallel with each other and the first and second bone members (12b, 12b; 12c, 12c). The damper support body (17) has three bone members (46, 12d), and a pair of elastic support portions (12b, 12b; 12c, 12c) snap-engaged with the first and second bone members (12b, 12c). 24A, 24B), and the pair of elastic support portions (24A, 24B) has a pushing direction for snap engagement with the first and second bone members (12b, 12b; 12c, 12c). A vehicle seat device, wherein the vehicle seat device is configured to be directed from the outside to the inside of the headrest frame (12). The vehicle seat device according to claim 2,
The first and second bone members (24A, 24B) of the first and second elastic support portions (24A, 24B) are engaged with and contacted with the third bone member (46, 12d) on the damper support (17). 12b, 12b; 12c, 12c) A vehicle seat apparatus comprising a positioning support portion (30) for defining a snap engagement position. The vehicle seat device according to claim 3,
The damper support is composed of a damper case (17) composed of first and second case halves (17A, 17B) which are detachably coupled to each other, and the damper case (17) has the elastic member ( 16) housing the weight (15) wrapped in the case half (17B) located on the rear side of the first and second case halves (17A, 17B) ; (24A, 24B) and the said positioning support part (30) were formed integrally, The vehicle seat apparatus characterized by the above-mentioned. The vehicle seat device according to claim 4,
The elastic support portions (24A, 24B) and the positioning support portion (30) are formed by pushing the elastic support portions (24A, 24B) into the first and second bone members (12b, 12b; 12c, 12c). , characterized in that the pushing direction is configured to have the same direction with respect to said third bone member prior SL-position-decided Me support section (30) (46,12d), the vehicle seat apparatus.

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