JP6070433B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat. In particular, the present invention relates to a vehicle seat including a seat back that supports the back of a seated person and a headrest that supports the head.

  In vehicle seats equipped with a headrest for supporting the occupant's head at the top of the seat back, a metal mounting bracket for mounting the headrest is generally fixed to the top of the seat back frame. The headrest is held by this mounting bracket. A seat back frame having such a mounting bracket is disclosed in, for example, Patent Document 1 below. Specifically, the mounting bracket is formed in a cylindrical shape, and a headrest support is fitted therein. The headrest support is made of resin and is generally formed in a cylindrical shape. A rod-like headrest headrest stay extending downward from the headrest is inserted into the headrest support, whereby the headrest is held by the seat back frame.

  In the technique of Patent Document 1, a mounting bracket having a certain length in the vertical direction is welded to the seat back frame at two locations, upper and lower, to increase the range of the joint and increase the rigidity. As a result, when the vehicle receives a rear-end collision (rear collision), the headrest of the seated person can be reliably received by the headrest, which is a measure against whiplash.

JP-A-11-216037

  By the way, generally, when the vehicle is traveling or idling, the floor panel vibrates at a specific frequency with respect to the engine. This vibration is also transmitted to the headrest via a seat frame attached to the floor panel. The natural frequency at which the headrest particularly easily vibrates with respect to the seat back frame increases as the rigidity of the coupling portion of the mounting bracket to the seat back frame increases. Therefore, when the above technique is used, there is a problem that the natural frequency of the headrest reaches the vicinity of the frequency of the floor panel, and the headrest tends to resonate with the floor panel, thereby amplifying the vibration.

  Here, in order to reduce the resonance level of the headrest, it is conceivable to lower the rigidity of the coupling portion of the mounting bracket. However, if the rearward rigidity is weak, the joint portion yields to the inertial force of the seated person's head when receiving a rear collision, and the head cannot be reliably supported by the headrest.

  On the contrary, the natural frequency of the headrest can be lowered by increasing the mass of the headrest. However, this increases the mass of the sheet and the manufacturing cost, which is not a preferable means.

  Thus, the present invention has been made in view of the above points, and the problem to be solved by the present invention is that the seating person's support performance to the seat at the time of the rear impact is normally ensured. The purpose is to suppress the vibration of the headrest at the time.

In order to solve the above problems, the vehicle seat according to the present invention takes the following means.
A vehicle seat according to a first aspect of the present invention is a vehicle seat including a seat back that supports a back of a seated person and a headrest that supports a head, and a seat back frame that forms a skeleton of the seat back. The upper and lower lateral members extending in parallel with the width direction of the seat back are provided at the upper portion, and the mounting members for mounting the headrest are the upper and lower lateral members of the seat back frame. It is arranged so as to be bridged vertically, and is coupled to the lower lateral member, but is not coupled to the upper lateral member and is disposed on the front surface of the upper lateral member, A back pad is disposed around the mounting member, and the range in which the mounting member can be moved away from the lateral member when the mounting member is not coupled to the upper lateral member is Characterized in that it is formed as a weak bending deformation rigidity than the pad flexural deformation stiffness of the body portion of the serial back pad.

According to this configuration, since the headrest attachment member is not coupled to the lateral member on the upper side of the seat back frame, the rigidity of the coupling portion is reduced, and the natural frequency of the headrest can be lowered. Therefore, vibration can be suppressed if the natural frequency is sufficiently lower than the peak of the amplification factor of resonance.
In the case of a rear collision, the headrest supports the seated person's head and exerts a backward action force. With respect to the backward acting force acting on the headrest, the headrest mounting member receives a supporting load by both the upper and lower lateral members. Therefore, at the time of a collision, the headrest can be reliably supported on the seat back at least in the same state as before.
At the moment of the rear impact, the headrest has an action force that tends to move forward relative to the seat back due to the impact of the impact, so that the distance from the seated person's head is reduced. And This acting force is exerted on the mounting member of the headrest, and since the mounting member is not coupled to the upper lateral member, it moves relative to the front in a direction away from the upper lateral member. As a result, the seated person's head can be brought into contact with and supported by the headrest as quickly as possible, and whiplash occurring at the seated person's neck can be effectively suppressed.
In general, a back pad that bends and deforms is disposed around the attachment member of the headrest. Since the back pad supports the back of the seated person, the back pad is formed of a pad material having a necessary and sufficient bending deformation rigidity. Therefore, when the body part of the back pad formed of such a material is bent and deformed and the headrest mounting member described above is moved forward, it becomes a movement resistance, and the mounting member can be quickly moved as desired. There are times when it cannot move.
However, according to the configuration of the present invention described above, the range in which the mounting member of the headrest can be moved away from the lateral member on the upper side is formed as a bending deformation stiffness that is weaker than the bending deformation stiffness of the main body of the back pad. Therefore, there is almost no movement resistance when the attachment member moves forward, and the movement can be performed as desired.
According to the configuration of the present invention, the range in which the attachment member moves between the back pad main body and the headrest attachment member is set to a bending deformation rigidity weaker than the pad bending deformation rigidity of the back pad main body. Therefore, the arrangement of the back pad in the seat back can be arranged in a surely positioned state. Further, the appearance of the surface of the seat back in the vicinity where the mounting member is disposed can be improved.

The vehicle seat according to the second invention of the present invention is the vehicle seat according to the first invention, and the range in which the attachment member is movable is a member different from the main body of the back pad. The bending deformation rigidity of the other member is weaker than the pad bending deformation rigidity of the main body portion of the back pad.
According to this configuration, a configuration in which the flexural deformation rigidity is weak is achieved by a member different from the back pad, and thus the weak flexural deformation rigidity can be easily set.

A vehicle seat according to a third aspect of the present invention is the vehicle seat according to the first aspect, wherein the material of the member disposed in a range in which the attachment member is movable is a back pad main body. Although it is the same as the material of a part, it is set as the shape structure from which the bending deformation rigidity becomes weaker than the said main-body part.
According to this configuration, the range in which the attachment member can be moved is also made of the same material as that of the back pad, and only the shape configuration is changed. Therefore, the mounting member can be integrally formed, and the handling thereof is facilitated.

  A vehicle seat according to a fourth aspect of the present invention is the vehicle seat according to any one of the first to third aspects, wherein the attachment member is a predetermined amount or more away from the upper lateral member. A restriction means for restricting movement is provided.

  According to this configuration, since the restricting means for restricting the mounting member from moving a predetermined amount or more forward in the direction away from the upper lateral member is provided, a seated person can be prevented when receiving a rear collision. It can be reliably supported.

  ADVANTAGE OF THE INVENTION According to this invention, suppression of the vibration of a headrest at the time of normal can be aimed at, ensuring the support performance of the seated person to the sheet | seat at the time of a rear collision.

It is a perspective view of the vehicle seat which concerns on embodiment. It is a side view which shows the seat back frame and headrest which concern on embodiment. FIG. 3 is a cross-sectional view showing the headrest mounting portion according to the embodiment, cut along line III-III in FIG. 1. It is the IV-IV sectional view taken on the line of FIG. It is a side view for demonstrating the action behavior of a headrest. It is a side view which shows embodiment provided with the control means which controls the movement more than the predetermined amount of the headrest forward movement. It is a graph explaining the effect by lowering the natural frequency of a headrest. It is a graph which shows the relationship with the force to the front accompanying the displacement to the front of a headrest.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a vehicle seat 10 of the present embodiment. The vehicle seat 10 of this embodiment is a seat 10 installed in a passenger compartment of a vehicle such as an automobile. In FIG. 1, the outer shape of the sheet 10 is indicated by a chain line. The seat 10 includes a seat cushion 20 on which a seated person sits, a seat back 30 that serves as a backrest for the seated person, and a headrest 40 (see FIG. 2) that supports the head of the seated person. As shown in FIG. 1, the seat back 30 is connected to a rear end portion of the seat cushion 20, and an angle formed with respect to the seat back 30 is adjusted by a reclining device (not shown) provided in the connecting portion. It is like that.
The seat back 30 includes a metal seat back frame 31 having a generally rectangular frame shape as a solid line in FIG. In addition to the seat back frame 31 described above, a part of the seat back 30 is shown in FIG. 3 as a member that forms an outer shape (indicated by a chain line in FIG. 1) including a backrest surface. In addition, a back pad 50 that is a cushioning material covering the seat back frame 31 and a skin cover 52 that covers the back pad 50 are provided. A headrest 40 is attached to the upper portion of the seat back 30 to support the back of the seated person.

  The seat back frame 31 is mainly composed of an upper frame 32, a side frame 33, and an under frame 34. These components are joined together by welding to form a frame structure having the generally rectangular frame shape. The side frame 33 is a member having a long plate shape disposed in the vertical direction on the left and right, and forms a side portion 32b of the frame structure. The upper frame 32 is a member having a pipe shape with a circular cross section, and is bent into a substantially U-shape. The upper frame 32 is disposed so as to connect the upper ends of the two side frames 33, and forms an upper side portion 32b and an upper side portion 32a of the frame structure. The under frame 34 is a member having a long plate shape, and is disposed laterally inside the lower portions of the left and right side frames 33 to form a lower side portion of the frame structure.

The seat back frame 31 is provided with a reinforcing member 35 that reinforces the upper frame 32. The reinforcing member 35 is made of metal and has a long plate shape, that is, a belt shape. The reinforcing member 35 is disposed so as to bridge the left and right side portions 32b of the upper frame 32 in a direction in which the width direction thereof is the vertical direction, and is parallel to the upper side portion 32a. . Both ends of the reinforcing member 35 are welded and fixed to the rear side of the side portion 32b. In addition, the reinforcing member 35 has its both edges in the width direction bent toward the front side in the longitudinal direction. The upper side portion 32a of the upper frame 32 in this embodiment corresponds to the lateral member on the upper side of the seat back frame of the present invention. Further, the reinforcing member 35 in the present embodiment corresponds to the lower lateral member of the present invention.
The seatback frame 31 is provided with a support bracket 36 for attaching a headrest support 37. The support bracket 36 is a metal member having a rectangular tube-shaped main body. The support bracket 36 is disposed in an arrangement relationship that bridges the upper frame 32 and the reinforcing member 35 on the front surface side. As shown in FIG. 3, a fixing portion 36 c extending in the direction of the reinforcing member 35 is provided on the lower body portion 36 b of the support bracket 36 facing the reinforcing member 35, and the tip of the fixing portion 36 c is on the front surface of the reinforcing member 35. On the other hand, it is fixed by welding. On the other hand, as well shown in FIG. 3, the upper body portion 36a of the support bracket 36 facing the upper frame 32 is not fixed to the upper frame 32, and is in a positional relationship with a slight gap. Yes. A cushioning material 38 such as felt is stretched at a portion of the upper frame 32 surface facing the support bracket 36 main body upper portion 36a in order to prevent the generation of noise due to the contact between the two members.

  As described above, the support bracket 36 is coupled to the reinforcing member 35 by the main body lower portion 36b, but is not directly coupled to the upper frame 32, and is simply disposed so as to pass through the front side thereof. The support bracket 36 and the upper frame 32 may be in contact with each other in a state where no external force is applied. However, the support bracket 36 and the upper frame 32 are designed so that a slight gap is formed as shown in FIG. It is preferable not to prevent the main body upper part 36a from slightly vibrating back and forth (resonating). For example, if it can be estimated that the resonance amplitude of the headrest 40 is about 1 mm at the maximum on both sides, this gap can be set to about 2 mm in consideration of manufacturing variations and the like. However, as long as the support bracket 36 is not directly coupled to the upper frame 32, the gap can be set to an arbitrary distance of less than 2 mm, or in some cases, 0 mm (that is, a contact state). In the drawing, the gap is slightly exaggerated for easy understanding.

  The headrest 40 has a metal headrest stay 41 having a bar shape extending downward. The headrest stay 41 is attached to the support bracket 36 via a headrest support 37. The headrest support 37 is a resin member having a cylindrical (not shown) main body, and is inserted into and fixed to a rectangular tube shape (see FIG. 1) of the support bracket 36. 2 and 3 show only the upper end of the main body of the headrest support 37. FIG. On the other hand, the headrest stay 41 of the headrest 40 is inserted into the cylindrical shape of the headrest support 37. The headrest stay 41 is configured to be vertically fixed with respect to the headrest support 37 by a known means provided at the upper end of the main body. As a result, the headrest 40 can adjust the amount of upward protrusion from the seat back 30 in accordance with the height position of the seated person's head. When positioned and fixed with respect to the headrest support 37, the headrest 40 is attached to the seat back frame 31. That is, the support bracket 36 in the present embodiment corresponds to the headrest mounting member in the present invention.

  When a force in the front-rear direction is applied to the headrest 40, the support bracket 36 into which the headrest stay 41 and the headrest support 37 are inserted is considered to be hardly deformed. The fixing member 36c) is slightly elastically deformed, and the headrest 40 together with the support bracket 36 is inclined according to the magnitude and direction of the force. Thus, the behavior when a force of a certain level is applied to the headrest 40 can be considered by a model in which the headrest 40 is elastically supported with respect to the seat back frame 31. The higher the rigidity of the coupling portion, the greater the natural frequency when the headrest 40 vibrates with respect to the seat back frame 31.

  Next, referring to FIG. 3, a configuration that is characteristic of the present embodiment will be described. As described above, the back pad 50 such as a urethane pad is disposed around the seat back frame 31 and is covered with the skin cover 52 to form the outer shape of the seat back 30. Since the back pad 50 supports the back of the seated person, the back pad 50 is made of a material having a relatively strong bending deformation rigidity necessary and sufficient for supporting the back pad 50. On the other hand, as described above, the support bracket 36 is not coupled to the upper side portion 32a of the upper frame 32, and can be tilted forward using the coupled lower reinforcing member 35 as a fulcrum. When the back pad 50 having a relatively strong bending deformation rigidity exists in the range in which the support bracket 36 tilts in the forward direction, there is a concern that the movement resistance when the support bracket 36 moves may be caused. For this reason, in this embodiment, the range in which the support bracket 36 moves in the forward direction is configured as a bending deformation rigidity that is weaker than the bending deformation rigidity of the main body portion 50A of the back pad 50. In FIG. 3, the range in which the support bracket 36 moves in the forward direction is indicated by a symbol X and indicated by diagonal lines.

In the present embodiment, the following two examples will be described as specific examples constituting the range X indicated by hatching. First, the first example is the case shown in FIG. 4A, in which the separate member 54 is formed from the main body portion 50 </ b> A of the back pad 50, and the separate member 54 is formed of a material that is bent and weaker than the back pad 50. Is. In this case, the portion that is the movement range X of the back pad 50 is formed into a hole-stolen hole shape, and another member 54 is inserted into the hole-shaped portion.
The second example is the case shown in FIG. 4B, which is integrated with the main body portion 50A of the back pad 50, but the shape of the range X indicated by hatching is weaker than the shape forming the main body portion 50A of the back pad 50. The shape is elastic deformation rigidity. In FIG. 4B, the shape of the main body portion 50A of the back pad 50 is a shape filled with a urethane pad, whereas the portion that becomes the movement range X is a so-called meat stealing arrangement shape. The bending deformation rigidity is weaker than that of the main body 50A.
In either of the first example and the second example, a gap is formed in the bending direction of the seat back 30 between the skin cover 52 and the seat back frame 31 of the seat back 30 that supports the back of the seated person. Since the back pad 50 and the like are filled without any problem, the respective members are arranged in a stably positioned state. In the case of the first example, since the bending deformation rigidity is set by a separate member, the setting is easy. In the case of the second example, since the member in the moving range is formed integrally with the main body of the back pad 50, the handling is easy.
4 (C) and 4 (D) show a modified embodiment of FIGS. 4 (A) and 4 (B), in which members having the same shape are arranged at the front and rear positions, or the front and rear positions are formed in the same shape. . As a result, the same action can be performed in the front-rear direction.

Next, the effect | action of the headrest 40 in the said embodiment is demonstrated.
First, in a normal traveling state of a vehicle such as a vehicle, resonance in the headrest 40 can be suppressed as shown in FIG. FIG. 7 is a graph showing the relationship between frequency and amplification factor.
A graph indicated by a solid line is a case where the lower part of the support bracket 36 is coupled and the upper part is not coupled and is movable forward as in the above embodiment. A graph indicated by a broken line is a case where both the upper part and the lower part of the support bracket 36 which is a conventional general configuration are coupled. As described above, the higher the rigidity of the connecting portion of the support bracket 36, the higher the natural frequency when the headrest 40 vibrates with respect to the seat back frame 31. As shown in FIG. 7, the closer the vibration frequency is to the floor panel frequency f ₁ , the greater the amplification factor of the vibration level when the headrest 40 resonates with the floor panel. When the support bracket 36 as in the conventional structure is bonded to both the upper portion 32a and the reinforcing member 35 of the upper frame 32, the f ₁ peak value of the amplification factor is increased as the graph shown by a broken line There is also the possibility of reaching. On the other hand, when the support bracket 36 is substantially supported only by the reinforcing member 35 as in the present embodiment, the rigidity of the coupling portion becomes weak, so that the peak value is f ₁ as shown by the graph shown by the solid line. The amplification factor can be lowered from the conventional point a to point b. As a result, the degree of resonance of the headrest 40 that can occur during traveling of the vehicle is suppressed.
When the cushioning material 38 made of felt, non-woven fabric or rubber is thinly attached to the surface of the upper frame 32 facing the support bracket 36, avoid direct contact between the metallic members 36 and 32. Thus, the harsh metal sound is not repeatedly generated. Further, if vibration can be absorbed by the buffer material 38, it is expected that the actual gain will be smaller than the point b in FIG. The The cushioning material 38 may be provided on the surface of the support bracket 36 instead of the upper frame 32.

Next, the behavior of the headrest 40 at the time of rear collision will be described with reference to FIGS. 5A and 5B both show a simplified range of FIG.
The general movement of the headrest 40 at the time of collision is as follows. First, immediately after the rear impact, the headrest 40 moves forward relative to the seat back 30 by the impact inertia force, and behaves so as to accelerate the time (head contact time) until it comes into contact with the head of the seated person. Thereby, reduction of whiplash can be effectively achieved.
Due to the initial behavior, a backward acting force acts on the seated person's head as a reaction force of the rear collision in a state in which the seated person's head is in contact with and supported by the headrest. This acting force is supported by the upper side portion 32a of the seat back frame 31 and the reinforcing member 35 via the support bracket 36, and the seat back bends and deforms slightly rearward and tilts.

Specifically, the behavior when a force is applied to the headrest 40 can be considered by a model in which the headrest 40 is elastically supported with respect to the seat back frame 31. As described above, the lower body portion 36b of the support bracket 36 is fixed to the reinforcing member 35 via the fixing portion 36c, but the upper body portion 36a is not fixed to the upper frame 32. That is, the headrest 40 is basically supported only by the reinforcing member 35 with respect to the seat back frame 31. Therefore, when the front and rear forces F ₁ and F ₂ are applied to the headrest 40 located above, elastic torsional deformation and the like of the reinforcing member 35 occur, and the support bracket 36 is fixed to the fixing portion 36c provided on the lower body portion 36b. Tilt back and forth around the center. In each of FIGS. 5A and 5B, the state before tilting is indicated by a broken line, and the state after tilting is indicated by a solid line.
Then, in the initial stage of the rear collision, as shown in FIG. 5A, a backward acting force acts on the seated person's head as a reaction of the rear collision and moves backward. On the other hand, an acting force F ₁ that tries to move forward by the impact action of the rear impact acts on the headrest 40. As a result, the support bracket 36 connecting the headrest 40 to the seat back 30 is not coupled to the upper side portion 32a of the upper frame 32 and can be moved forward, so the headrest 40 is moved forward. Moving. By the movement of the seated person's head backward and the headrest 40 moving forward, the distance between the two quickly disappears, and the seated person's head comes into contact with the headrest 40 and is received by the headrest 40. As a result, bending caused by the tilt of the head of the seated person toward the back is prevented, and whiplash can be suppressed. Thereafter, the head and the headrest 40 are united by the action force of the backward reaction acting on the head of the seated person, and the action force of the rear acts on both.

In the initial behavior of the headrest 40, the support bracket 36 that connects the headrest 40 to the seat back 30 moves forward as described above. This moving range is a range X indicated by hatching in FIG. In this range X, the rigidity to bend and deform when the support bracket 36 moves is relatively weak, so there is almost no resistance during movement, and the desired movement can be achieved. It can be done. That is, the bending deformation rigidity of the range X is set to be weaker than the bending deformation rigidity of the main body portion 50A of the back pad 50 that forms the seat back 30. FIG. 8 is a graph showing the relationship between the force with respect to the forward displacement of the headrest 40 or the support bracket 36. In this graph, the diagrams of Y ₁ and Y ₂ indicated by solid lines are for the present embodiment. A diagram Y ₃ indicated by a broken line is a case where the range X enabling the forward movement is formed in the same state as the main body portion 50 A of the back pad 50. As can be seen from the graph of FIG. 8, in the case of Y _3, a large force is required to move forward, which hinders the desired movement of quickly moving the headrest 40 forward. Sometimes. On the other hand, in the case of the diagram Y ₁ of this embodiment, the headrest 40 can be quickly moved forward as desired.

  After the above-described initial behavior of the headrest 40, the head and the headrest 40 are integrated with each other and exert a backward acting force due to the reaction of the rear impact that acts on the head of the seated person. And the headrest 40 and the support bracket 36 will be in the state shown as a continuous line from the virtual line state shown to FIG. 5 (B). That is, the support bracket 36 that has been separated from the upper side portion 32a of the upper frame 32 moves rearward until it comes into contact with the upper side portion 32a via the cushioning material 38, and exerts a backward acting force acting on the headrest 40. It will be in the state received by this upper side part 32a. In this state, the main body upper portion 36a of the support bracket 36 comes into contact with the upper frame 32 so that the support bracket 36 is supported by both the upper frame 32 and the reinforcing member 35, and the headrest necessary for supporting the seated person is obtained. A support rigidity of 40 can be ensured.

FIG. 6 shows an embodiment including a regulating means 60 that regulates the headrest 40 from moving forward by a predetermined amount or more.
In the embodiment shown in FIG. 6, illustration of the back pad 50 and the skin cover 52 shown in FIG. 3 is omitted, but the present embodiment is also equipped with the same configuration. In the present embodiment shown in FIG. 6, there is provided a restricting means 60 that restricts the support bracket 36 from tilting forward when a forward force is applied to the headrest 40. If this restricting means 60 is not provided, when a large forward force F acts on the headrest 40 as shown in FIG. 8, the connecting portion to the seat back frame is greatly plastically deformed as shown by the solid line graph Y _2. Resulting in. By restricting the support bracket 36 from tilting forward by a certain displacement S1 or more, even if an excessively large load F is applied from the rear, it is possible to prevent the headrest 40 from changing excessively and becoming unusable. it can.

As one embodiment of the restricting means 60 as described above, a stopper 62 is attached to the headrest support 37 or the support bracket 36. The stopper 62 is made of a material having a certain degree of rigidity, such as resin or metal. When the stopper 62 is made of resin, it can be integrally formed with the headrest support 37, and when it is made of metal, it can be integrally formed with the support bracket 36. FIG. 6 shows an example in which a resin stopper 62 is formed separately from the headrest support 37. This resin / separate type stopper 62 is formed as a generally L-shaped or bowl-shaped member having a ceiling 63 extending forward and a rear wall 61 extending downward as shown in FIG.
Then, as shown in FIG. 6, when a forward force F1 is applied to the headrest 40, the rear wall portion 61 of the stopper 60 comes into contact with the rear surface of the upper frame 32 and the support bracket 36 is prevented from tilting further forward. (State shown by phantom lines in FIG. 6).

As mentioned above, although embodiment of this invention was described, this invention can be implemented with another various form.
For example, the headrest 40 in the present embodiment has a headrest stay 41 attached to a reinforcing member 35 included in the seat back frame 31 via a headrest support 37 and a support bracket 36. However, the headrest stay 41 of the headrest 40 may be attached by welding directly to the reinforcing member 35. In this case, the headrest stay 41 corresponds to the headrest 40 mounting member in the present invention.
In the present embodiment, the upper body portion 36a of the support bracket 36 facing the upper frame 32 is disposed in a positional relationship with a slight gap with respect to the upper frame 32. As long as it is not fixed with respect to the frame 32, it is good also as a form which closes this clearance gap and makes it a contact state. Even in this case, since the support bracket 36 is basically supported only by the reinforcing member 35 unless a large load is applied to the rear side, the same effect as that of the present embodiment can be obtained.
In the present embodiment, the felt 38 for preventing the generation of noise due to the contact between the upper frame 32 and the support bracket 36 is stretched on the upper frame 32 side. It is good also as a form stretched on. Further, instead of the felt 38, a pad made of rubber, gel or other material having a vibration absorbing effect may be stretched.

DESCRIPTION OF SYMBOLS 10 Seat 30 Seat back 31 Seat back frame 32 Upper frame 32a Upper side part 32b Side part 33 Side frame 35 Reinforcement member 36 Support bracket 36c Fixing member 37 Headrest support 38 Cushioning material (felt)
40 headrest 41 headrest stay 50 back pad 52 skin cover 60 regulating means

Claims (3)

A vehicle seat comprising a seat back that supports the back of the seated person and a headrest that supports the head,
The seat back frame constituting the skeleton of the seat back includes upper and lower lateral members extending in parallel with the width direction of the seat back at the upper part,
An attachment member for attaching the headrest is disposed so as to vertically bridge the upper and lower lateral members of the seat back frame, and is coupled to the lower lateral member. Is not coupled to the directional member and is disposed on the front side of the upper lateral member;
A back pad is disposed around the mounting member, and the range in which the mounting member can be moved away from the lateral member when the mounting member is not coupled to the upper lateral member is the back. It is formed as a bending deformation rigidity weaker than the pad bending deformation rigidity of the body of the pad ,
The range in which the mounting member is movable is configured by arranging a member different from the main body portion of the back pad, and the bending deformation rigidity of the other member is the pad bending deformation of the main body portion of the back pad. A vehicle seat characterized by being weaker than rigidity . A vehicle seat comprising a seat back that supports the back of the seated person and a headrest that supports the head,
The seat back frame constituting the skeleton of the seat back includes upper and lower lateral members extending in parallel with the width direction of the seat back at the upper part,
An attachment member for attaching the headrest is disposed so as to vertically bridge the upper and lower lateral members of the seat back frame, and is coupled to the lower lateral member. Is not coupled to the directional member and is disposed on the front side of the upper lateral member;
A back pad is disposed around the mounting member, and the range in which the mounting member can be moved away from the lateral member when the mounting member is not coupled to the upper lateral member is the back. It is formed as a bending deformation rigidity weaker than the pad bending deformation rigidity of the body of the pad,
The material of the member disposed in the range in which the mounting member can be moved is the same as the material of the main body of the back pad, but has a shape configuration in which the bending deformation rigidity is weaker than that of the main body. A vehicle seat characterized by that. The vehicle seat according to claim 1 or 2 ,
A vehicle seat, characterized in that there is provided a restricting means for restricting movement of the attachment member by a predetermined amount or more in the separating direction from the upper lateral member .

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