JP7019902B2 - Seat lock device - Google Patents

Description

The present invention relates to a seat lock device that holds a seat back configured to be upright in a locked state.

The seat of the vehicle is equipped with a seat cushion which is a seat surface and a seat back which is a backrest. Of these, the seat back is in an upright posture for normal sitting and is tilted forward for convenience of loading. It is possible to switch between up and down with the posture. In the sitting posture, the seat lock device provided on the seat back (see, for example, Patent Document 1) is configured to be held in a locked state and stabilized by engaging with a striker fixed to the vehicle body body. There is. In addition, the standing posture may be switched between two stages by the internal mechanism of the seat lock device. The seat lock device is often covered with a cover mainly from the viewpoint of appearance design.

As shown in FIG. 9, the seat lock device 500 according to the prior art has, as a basic configuration, a striker 502 that enters from the rear, a hook member 505 having an engagement groove 504 that engages with the striker 502, and a hook member 505. It includes a shaft member 506 that rotatably supports the shaft member near the front end, and a case member 508 to which the shaft member 506 is fixed. The case member 508 is provided with a striker entry groove 510 into which the striker 502 enters. The hook member 505 is elastically urged internally. The seat back is locked by the engagement groove 504 engaging with the striker 502, and the engagement between the hook member 505 and the striker 502 is released by the operation of the open lever 512. The seat lock device 500 is fixed to the frame of the seat back by the upper bracket 514 projecting further upward from the upper surface of the case member 508 and the lower bracket 516 below.

Japanese Patent No. 4847901

By the way, among the three-seater rear seats of vehicles, the seat belts of the center seats are increasingly being adopted from the two-point type, which has been the mainstream until now, to the three-point type. When a three-point seat belt is used in the rear center seat, the seat back frame is required to have anchorage strength in the seat belt of the center seat.

On the other hand, when the vehicle suddenly decelerates, the luggage in the luggage compartment may collide with the rear surface of the seat back of the rear seat. Will be done. As shown in FIG. 10, assuming that the luggage W collides with the center of the rear seat in such a case, the seat back is pushed out diagonally forward, and the seat lock device locks the seat back. The load F applied as a reaction to the 500 is generally in the diagonal direction behind the vehicle. The seat lock device 500 is originally a device that locks the striker 502 in the front-rear direction of the vehicle. It is desirable to have sufficient strength so that the hook member 505 does not come off from the engaging groove 504.

In the above-mentioned seat lock device 500, when the load F is excessive, the hook member 505 acts on the seat lock device 500 in the rear direction and the vehicle width outward direction, and the hook member 505 engaged with the striker 502 is engaged. The peripheral portion of the groove 504 may be displaced in the vehicle width direction to press the peripheral portion of the striker entry groove 510 of the case member 508.

The peripheral portion of the striker entry groove 510 in the case member 508 is a portion that is easily deformed. This is because the case member 508 has a structure in which the striker entry groove 510 is deeply formed near the front shaft member 506 near the upper and lower center portions, and the rear portion is open, and further, this portion is a frame. This is because it is separated from the upper bracket 514, which is a fixing portion for the above.

When the case member 508 is deformed, the striker 502 may slip through the engagement groove 504 and be disengaged. The strength of the case member 508 can be increased by simply increasing the thickness of the case member 508, but this causes an increase in weight and cost.

The present invention has been made in view of the above, and an object of the present invention is to provide a seat lock device capable of suppressing deformation of a case member when a lateral load acts on a striker and a pressing force is applied. And.

In order to solve the above-mentioned problems and achieve the object, the seat lock device according to the present invention is a seat lock device that holds the seat back in the vehicle in a locked state, and engages with a striker entering from the rear. A hook member having an engaging groove, a shaft member that rotatably supports the hook member in the vicinity of the front end, a case member to which the shaft member is fixed, and a case member formed in the case member to allow the striker to enter. It has a striker entry groove and a plurality of fixing portions for fixing the case member to the frame of the seat back, and the fixing portion includes a rear fixing portion protruding inward from the rear surface of the case member. It is a feature.

The rear fixing portion may be provided above the striker entry groove on the rear surface.

The fixing portion may include a lower fixing portion that projects further downward from the lower surface of the case member.

It may have an engaging notch provided on the upper part of the case member and hooked from above to the engaged notch of the frame.

It has a reinforcing material that extends above and below the striker entry groove to reinforce the case member, and at least one of the reinforcing materials is co-tightened to the frame by one or more fixing portions and a fastening member. You may.

The striker is a first striker, the first striker integrally interlocks with a second striker at a fixed distance, and the engagement groove engages with the first striker or the second striker. The seat back may be lockable at two tilt angles.

The seat lock device according to the present invention includes a rear fixing portion that protrudes inward from the rear surface of the case member. When a lateral load acts on the striker to receive a pressing force, the load due to the pressing force is effectively received by the rear fixing portion, and deformation of the case member can be suppressed.

FIG. 1 is a schematic perspective view showing a seat to which the seat lock device is applied. FIG. 2 is a schematic side view showing a seat to which the seat lock device is applied. FIG. 3 is a perspective view of the seat frame and the seat lock device. FIG. 4 is a perspective view of the seat lock device viewed from diagonally forward. FIG. 5 is a perspective view of the seat lock device viewed from diagonally rearward. FIG. 6 is a partially omitted side view of the seat lock device. FIG. 7 is a perspective view of the seat lock device fixed to the seat frame. FIG. 8 is a perspective view of the upper part of the seat lock device and the seat panel. FIG. 9 is a schematic view of the seat lock device according to the prior art. FIG. 10 is a schematic view showing an operation when a load in the rear diagonal direction acts on the seat lock device.

Hereinafter, the seat lock device 10 according to the embodiment will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

As shown in FIGS. 1 and 2, the seat lock device 10 according to the present embodiment is applied to the left and right seats 12 of the vehicle, respectively. The seat lock device 10 is partially covered with a cover 11. The seat 12 includes a seat cushion 12a which is a seat surface and a seat back 12b which is a backrest. The seat back 12b rotates about the seat back rotation shaft 13, and can be switched between an upright posture for normal sitting and a forward tilted posture in which the seat back is tilted forward for convenience of loading. .. Further, the standing posture can be switched between a standard first standing posture and a second standing posture with a deeper inclination by the mechanism of the seat lock device 10. In FIG. 1, the first standing posture of the seat back 12b is shown by a solid line, and the forward leaning posture and the second standing posture are shown by a virtual line.

The seat 12 is, for example, a rear seat of a vehicle, in which two seats are arranged side by side, and a luggage compartment is behind the seat 12. Luggage W is loaded in the luggage compartment, and if the vehicle suddenly decelerates, the luggage W may collide with approximately the center of the two-seat seat 12. At this time, the load F acting on the seat lock device 10 is generally in the diagonal direction behind the vehicle, and the lateral load Fs, which is a component force not only in the rear direction but also in the lateral direction of the vehicle width, also acts. In the following description, the seat 12 on the left side of the vehicle (front side in FIG. 1) and the seat lock device 10 inside the seat 12 will be described as an example. ..

The seat lock device 10 is provided slightly below the shoulder of the seat back 12b, and engages with the metal first striker 14a or the second striker 14b fixed to the vehicle body panel side to engage the seat back. 12b can be locked in two standing positions. Further, the seat back 12b can be tilted forward by disengaging the seat lock device 10 from the first striker 14a and the second striker 14b.

The first striker 14a and the second striker 14b are arranged side by side at a fixed distance, and the tips are interconnected so that one of them forms a rectangular opening and the opening side is fixed to the striker base 15. Either the first striker 14a or the second striker 14b is typically also referred to as the striker 14. The portion of the seat lock device 10 that is not covered by the cover 11 is covered by the seat back 12b so that almost the entire seat lock device 10 is not visible except for a small part where the striker 14 enters. Since the cover 11 is a visible part, it has a slightly rounded and good-looking design as a whole.

By lifting the seat back 12b from the forward tilted posture, the first striker 14a first engages with the seat lock device 10 and becomes the first standing posture. Next, the engagement between the seat lock device 10 and the first striker 14a is released by operating the operation unit 16 provided on the shoulder portion of the seat back 12b, and the second striker 14b is engaged by tilting the seat back 12b deeper. Then, it is locked in the second standing posture, or is returned to the forward leaning posture by tilting forward again. The disengagement in the second standing posture is also by operating the operation unit 16.

The seat lock device 10 is applied to the left and right seats 12 of the vehicle, respectively. In the following description, the seat 12 on the left side of the vehicle (front side in FIG. 1) and the seat lock device 10 inside the seat 12 will be described as an example. .. Further, in the following description, the direction is based on the front / rear, inside / outside, and up / down of the vehicle, and the seat back 12b is basically in the first standing posture. In each drawing, for ease of understanding, the front-rear direction is X, the front is X1, the rear is X2, the vehicle width direction is Y, the inner direction is Y1, the outer direction is Y2, the vertical direction is Z, the upper is Z1, and the lower is Z2. Each is indicated by an arrow. Further, the relative operation between the seat lock device 10 and the striker 14 will be described assuming that the striker 14 is displaced with the seat lock device 10 as a reference.

As shown in FIG. 3, the seat lock device 10 is attached to the frame 18. The frame 18 is a strength member provided inside the seat back 12b, and has a frame pipe 18a and a frame panel 18b. The frame pipe 18a is formed by bending and joining strong pipes, and forms four sides, left and right and upper and lower sides. The seat back rotation shaft 13 is located below the lower side of the frame pipe 18a.

As shown in FIGS. 4 and 5, the seat lock device 10 has an outer case (case member) 20, an inner case 22, a composite functional material 50, and a hook member 26 that engages with the striker 14. .. The hook member 26 is a part of the internal mechanism 28. The outer case 20, the inner case 22, and the composite functional material 50 are, for example, metal press-molded products. The hook member 26 has an engaging groove 26a with which the striker 14 is engaged, a free fitting groove 26b, and a rotating shaft (shaft member) 26c. The engaging groove 26a is provided in the vicinity of the rear end, the free fitting groove 26b is provided in the central portion, and the rotating shaft 26c is provided in the vicinity of the front end. The engaging groove 26a is a portion sandwiched between the corner portion 26d and the sub-corner portion 26e in the front-rear direction. The composite functional material 50 is a component having a cover holding function and a reinforcing function, as will be described later.

The outer case 20 has an outer surface 20a that covers the internal mechanism 28, a front surface 20b, a rear surface 20c, an upper surface 20d, and a lower surface 20e. The outer case 20 is further folded back from a mounting piece (lower fixing portion) 20f that is folded back from the lower surface 20e and protrudes downward, a mounting piece (rear fixing portion) 20g that protrudes inward from the rear surface 20c, and a rear portion of the upper surface 20d. It has a holding protrusion 20h that protrudes upward. The holding protrusion 20h forms an inward projecting piece 20ha that is partially bent inward. An inverted V-shaped engaging notch 20hb is provided at the lower end of the inwardly projecting piece 20ha.

The gap between the outer side surface 20a and the hook member 26 in the vehicle width direction is narrow. The outer side surface 20a and the rear surface 20c are provided with a striker entry groove 20i into which the striker 14 enters. Since the seat lock device 10 is a two-stage lock type, the striker entry groove 20i is also formed longer in the vehicle length direction because the first striker 14a enters the free fitting groove 26b as described later. Since the striker entry groove 20i is long, the seat lock device 10 is large, and the cover 11 covering the seat lock device 10 is also large. The striker entry groove 20i extends from the rear end of the outer case 20 toward the front to the vicinity of the rotation shaft 26c and crosses the rear surface 20c. The outer side surface 20a pivotally supports the outer end of the rotating shaft 26c. The outer side surface 20a is provided with inwardly convex arcuate bulging portions 20ja and 20jb. The arcuate bulging portions 20ja and 20jb are provided around the rotation shaft 26c in accordance with the rotation range of the hook member 26, and have an effect of suppressing the hook member 26 from being displaced outward by an external force. The arc-shaped bulging portion 20ja is slightly long at a position away from the rotating shaft 26c, and the arc-shaped bulging portion 20jb is slightly short at a position close to the rotating shaft 26c.

The inner case 22 has an inner side surface 22a (see FIG. 6) that covers the internal mechanism 28, a front surface 22b (see FIG. 4), and a rear surface 22c (see FIG. 5). The inner case 22 is combined with the outer case 20 to cover the internal mechanism 28. The front surface of the internal mechanism 28 is covered with the front surface 20b and the front surface 22b, and the rear surface is covered with the rear surface 20c and the rear surface 22c. The lower portion of the inner case 22 extends downward to substantially the same position as the lower side of the mounting piece 20f of the outer case 20. The lower portion of the inner case 22 and the mounting piece 20f are provided with two coaxial front and rear bolt holes 30. The bolt hole 30 is a hole in the vehicle width direction. The inner case 22 has a mounting piece 22d above. A part of the mounting piece 22d and the holding protrusion 20h overlap each other.

A bolt hole 32 is provided near the tip of the mounting piece 20 g. The bolt hole 32 is a hole in the front-rear direction. A hole 20ga is provided at the root of the mounting piece 20g, and a bolt B is inserted into the hole 20ga to be screwed and fixed to the rear surface 22c of the inner case 22. The seat lock device 10 is fixed by inserting bolts into the bolt holes 30 and 32 and screwing them into the frame 18. The inner case 22 is provided with a striker entry groove 22e into which the striker 14 enters. The striker entry groove 22e of the inner case 22 and the striker entry groove 20i of the outer case 20 substantially overlap each other in a side view. The inner case 22 pivotally supports the inner end of the rotating shaft 26c.

The composite functional material 50 is connected to a U-shaped portion 50a provided along the outer surface 20a, a base 50g that abuts a part of the mounting piece 20f, and these U-shaped portions 50a and the base 50g. It has a portion 50f. The U-shaped portion 50a is more accurately shaped like a rectangle with a rear opening, and has reinforcing members 50b and 50c, a pair of arms 50d, and an arch 50e. The reinforcing members 50b and 50c extend in the front-rear direction while abutting on the outer surface 20a. The reinforcing members 50b and 50c are provided above and below the striker entry groove 20i so as to run from the vicinity of the front end to the rear end of the striker entry groove 20i. The lower side of the upper reinforcing material 50b coincides with the upper side of the striker entry groove 20i. The reinforcing material 50b has a wider vertical width toward the rear. The upper side of the lower reinforcing material 50c substantially coincides with the lower side of the striker entry groove 20i, and covers the portion of the outer surface 20a below the striker entry groove 20i. The reinforcing members 50b and 50c are provided with elongated holes 50h in the front-rear direction.

The pair of arms 50d are long plates extending further forward from the front ends of the reinforcing members 50b and 50c, and extend to the front end of the outer surface 20a. The arm 50d is narrower than the front ends of the reinforcing members 50b and 50c. The rear end of the arm 50d is in contact with the outer surface 20a together with the reinforcing members 50b and 50c, and is separated from the outer surface 20a through a two-step bending portion toward the front, and the central portion and the front portion are on the outer surface 20a. On the other hand, they are parallel with some gaps. The arm 50d holds the cover 11.

The arch 50e connects the front ends of the pair of arms 50d in the vertical direction, and the central portion thereof is recessed inward and abuts on the outer surface 20a. The arch 50e is provided at a position that does not interfere with the rotation shaft 26c.

The connecting portion 50f connects the lower portion of the reinforcing member 50c and the upper portion of the base 50g, the front portion 50fa is provided diagonally, and the rear portion 50fb is provided horizontally along the lower surface 20e. As a result, the connection strength of the reinforcing material 50c and the U-shaped portion 50a to the base 50g is increased.

The base 50g has a shape that abuts on the rear half of the mounting piece 20f. The base 50g forms one bolt hole 30. The bolt holes 30 correspond to the rear bolt holes 30 of the two bolt holes 30 included in the mounting piece 20f. That is, the rear bolt hole 30 is formed over the inner case 22, the mounting piece 20f, and the base 50g.

Next, as shown in FIG. 6, the internal mechanism 28 has a sensing lever 34, a cam plate 36, and an open lever 38 in addition to the hook member 26 described above. The hook member 26, the sensing lever 34, and the cam plate 36 are elastically urged in the clockwise direction in FIG. 6, and the open lever 38 is elastically urged in the counterclockwise direction. The hook member 26 is arranged on the front side in FIG. 6, the cam plate 36 is arranged at the back thereof, and the sensing lever 34 and the open lever 38 are further arranged substantially vertically side by side at the back.

When the first striker 14a enters from the rear and pushes up and passes through the corner portion 26d, the hook member 26 rotates clockwise again due to the elastic force to engage the first striker 14a with the engaging groove 26a. As a result, the seat back 12b is locked to the first standing posture. Further, by operating the open lever 38, the first striker 14a is made to enter along the line L1 in a state where the hook member 26 is temporarily rotated counterclockwise, and the hook member 26 is returned to the original position. The first striker 14a fits into the free fitting groove 26b, and the second striker 14b engages with the engaging groove 26a. As a result, the seat back 12b is locked to the second standing posture.

The sensing lever 34 is pivotally supported by a central rotating shaft 34a, and is a member whose angle changes when the detecting portion 34b at the rear end abuts / does not abut against the striker 14, and the pin 34c at the front end is a cam. Displace the plate 36.

The cam plate 36 is pivotally supported by a rotation shaft 36a at the upper end of the front. When the cam plate 36 receives a large external force and tries to rotate counterclockwise, the rear interlock surface 36c receives the interlock pin 26f of the hook member 26, so that the hook member 26 rotates excessively. To prevent that. The cam plate 36 rotates slightly when the pin 36d is operated by the open lever 38 when the striker 14 and the engagement groove 26a are disengaged. As a result, the interlock pin 26f can enter the relief portion 36e, the hook member 26 can rotate in the counterclockwise direction, and the engagement between the striker 14 and the engagement groove 26a is released.

The open lever 38 is pivotally supported by an upper rotating shaft 38a and is rotated by a rod connected to the rod hole 38b. When the open lever 38 is rotated by the rod, the cam release lever surface 38c slightly pushes up the pin 36d, and the fan-shaped cam holding curved surface 38d slides into contact with the pin 36d to hold the pin 36d. As a result, the cam plate 36 is held in an appropriate release position. Further, when the open lever 38 is rotated by the rod, the hook release protrusion 38e pushes up the interlock pin 26f to rotate the hook member 26 to an appropriate release position, and the striker 14 and the engagement groove 26a are connected as described above. The engagement is disengaged. That is, the interlock pin 26f also has a function as a hook release pin for releasing the striker 14.

As shown in FIG. 7, the seat lock device 10 is fixed to the frame panel 18b by screwing bolts B from two bolt holes 30 on the lower side and one bolt hole 32 on the inner side. Since the bolt hole 30 is inserted with the bolt B in the vehicle width direction and the bolt hole 32 is inserted with the bolt B in the vehicle length direction, the seat lock device 10 can be stably fixed from two directions. The two bolt holes 30 and 32 are arranged in different directions with respect to the engaging groove 26a, which is the most loaded in the seat lock device 10, and at substantially the same distance, so that the load can be shared in a well-balanced manner. ..

Since the mounting piece 20g projects inward from the rear surface 20c of the outer case 20, it is easy to directly fix the mounting piece 20a to the frame pipe 18a. The mounting piece 20g is provided above the striker entry grooves 20i and 22e on the rear surfaces 20c and 22c and at the middle height of the seat lock device 10, and is well-balanced. The mounting piece 20f and the mounting piece 20g are provided above and below the striker entry grooves 20i and 22e, and are well-balanced in the height direction.

Here, the operation when a large load F is applied to the seat lock device 10 in the diagonal direction behind the vehicle due to the collision of the luggage W with respect to the seat back 12b (see FIG. 1) will be described.

As shown in FIG. 7, the seat lock device 10 in this case tries to be displaced in the diagonal direction in front of the vehicle as shown by the arrow A, but since the striker 14 is fixed, the load F is moved in the diagonal direction behind the vehicle as a reaction. It works. Then, the component force in the rear direction is supported by the engaging groove 26a, but the lateral load Fs also acts, so that the connecting portion 14c between the first striker 14a and the second striker 14b abuts on the side surface of the corner portion 26d, or the second 1 The rear end portion of the hook member 26 begins to be displaced toward the outside in the vehicle width direction (the front side of the paper surface in FIG. 7) due to the frictional force of the striker 14a.

At this time, first, the hook member 26 abuts on and receives the two arcuate bulging portions 20ja and 20jb above the striker entry groove 20i. When the lateral load Fs is relatively small, it is possible to limit the lateral displacement of the hook member 26 only by these arcuate bulging portions 20ja and 20jb.

When the lateral load Fs is large, the hook member 26 is further displaced, but the corner portions 26d and the sub-corner portions 26e, which are both ends of the opening of the engagement groove 26a, abut and press the striker entry groove 20i on the outer surface 20a. .. The lateral load Fs acts on the corner portion 26d and the sub-corner portion 26e that is integrated with the corner portion 26d with the engaging groove 26a interposed therebetween.

The corner portion 26d and the sub-corner portion 26e act on the upper and lower sides of the striker entry groove 20i on the outer surface 20a, and the upper side thereof is reinforced by the reinforcing material 50b, and the mounting piece 20g and the bolt hole are relatively close to each other. Since it is fixed to the frame panel 18b via 32, it is difficult to deform. In particular, the reinforcing material 50b extends rearward, and the rear end portion has a central height of the mounting piece 20g, and the pressing force is transmitted from the reinforcing material 50b to the mounting piece 20g and is easily supported. Although not shown, if the reinforcing material 50b is further bent and extended inward and fixed to the frame panel 18b with the bolt holes 32 together with the mounting piece 20g, the reinforcement is further strengthened.

Since a tensile force acts on the mounting piece 20 g rather than a bending force, it is difficult to bend or deform, it is easy to receive a load, and the strength in the vehicle width direction is improved. Since the mounting piece 20g is fixed to the rear surface 22c of the inner case 22 via the hole 20ga, not only the outer case 20 but also the inner case 22 can receive the pressing force of the corner portion 26d and the sub-corner portion 26e, and the load can be received. Is dispersed. The mounting piece 20g protrudes inward from just above the striker entry groove 20i, and the position of the bolt hole 32 is closer to the point of action of the lateral load Fs than the upper bracket 514 according to the prior art (see FIG. 9 ), and the load is applied. Easy to take.

In the prior art, the upper bracket 514 is provided above the load action point of the hook member 505, its bolt holes are in the vehicle width direction, and the lateral load Fs points outward, so that the case member 508 is likely to bend. .. On the other hand, in the seat lock device 10, the pressing force by the corner portion 26d and the sub-corner portion 26e points outward, but the mounting piece 20 g extends substantially on the line of the lateral load Fs and in the opposite direction. Therefore, it is easy to receive the lateral load Fs.

The corner portion 26d and the sub-corner portion 26e act on the upper and lower sides of the striker entry groove 20i on the outer surface 20a, and the lower side thereof is reinforced by the reinforcing material 50c, and the connecting portion 50f and the bolt are relatively close to each other. Since it is fastened together with the frame panel 18b via the hole 30, it is difficult to be deformed.

In this way, the seat lock device 10 can limit the displacement of the hook member 26 and prevent the striker 14 from coming off the engaging groove 26a. No other parts are interposed between the corner portion 26d and the outer surface 20a, and when a lateral load Fs is received, these corner portions 26d are likely to come into contact with the outer surface 20a and are likely to receive the lateral load Fs. .. As a result, deformation of the outer case 20 is suppressed, the hook member 26 is supported, and the striker 14 can be prevented from coming off. That is, the meshing strength between the engaging groove 26a and the striker 14 is improved.

The seat lock device 10 is not provided with the upper rear bracket 514 as a bolt fixing means as in the prior art (see FIG. 12), but is provided with a holding protrusion 20h at a position close to the upper bracket 514. As described above, the holding protrusion 20h has an inward projecting piece 20ha bent inward and an engaging notch portion 20hb provided at the lower end of the introverting projecting piece 20ha. As shown in FIG. 8, the engaging notch 20hb is hooked from above in the vertically elongated hole (engaged notch) 18ba provided in the frame panel 18b. The vertically elongated hole 18ba is formed to be slightly larger than the inward projection piece 20ha in both the vertical and horizontal dimensions. The engagement between the engagement notch 20hb and the vertically elongated hole 18ba can be used as a temporary assembly at the time of assembling the seat lock device 10 to the frame 18, and can function as a strength member in the front-rear direction after the assembly.

The present invention is not limited to the above-described embodiment, and it is needless to say that the present invention can be freely changed without departing from the gist of the present invention.

10 Seat lock device 12b Seat back 14, 14a, 14b Striker 18 Frame 18a Frame pipe 18b Frame panel 18ba Vertical hole (engaged notch)
20i, 22e Striker entry groove 20 Outer case (case member)
20a Outer side surface 20c, 22c Rear surface 20g Mounting piece (rear fixing part)
20f mounting piece (lower fixed part)
20d Top surface 20b, 22b Front surface 20h Holding protrusion 20hb Engagement notch 22 Inner case (case member)
22a Inner side surface 26 Hook member 26a Engagement groove 26c Rotating shaft (shaft member)
26d Square 26e Secondary corner 30, 32 Bolt hole 50 Composite functional material 50b, 50c Reinforcing material 50d Arm 50g Base F Load Fs Lateral load

Claims (6)

A seat lock device that holds the seat back in a vehicle in a locked state.
Based on the state of being attached to the outer part of the vehicle in the upright seat back,
A hook member with an engaging groove that engages with a striker entering from the rear,
A shaft member that rotatably supports the hook member near the front end of the hook member, and
A case member to which the shaft member is fixed and
A striker entry groove formed in the case member and into which the striker enters,
A plurality of fixing portions for fixing the case member to the frame of the seat back,
Have,
The case member is configured by combining an outer outer case member and an inner inner case member with respect to a vehicle so as to cover an internal mechanism including the hook member.
The fixing portion includes a rear fixing portion in which a part of the rear surface of the outer case member in which the striker entry side opening of the striker entry groove is formed protrudes inward from the inner case member with reference to the vehicle.
A seat lock device characterized in that the inner case member is fixed to the frame and the rear surface of the inner case member is fixed to the rear fixing portion . In the seat lock device according to claim 1,
The rear fixing portion is a seat lock device provided above the striker entry groove on the rear surface of the outer case member . In the seat lock device according to claim 1 or 2.
The fixing portion is a seat lock device including a lower fixing portion that projects further downward from the lower surface of the outer case member. In the seat lock device according to any one of claims 1 to 3, the seat lock device
A seat lock device provided on the upper portion of the outer case member and having an engaging notch portion that is hooked from above to the engaged notch portion of the frame. In the seat lock device according to any one of claims 1 to 4.
It has a reinforcing material that extends above and below the striker entry groove to reinforce the outer case member.
A seat lock device characterized in that at least one of the reinforcing members is co-fastened to the frame by one or more fixing portions and a fastening member. In the seat lock device according to any one of claims 1 to 5.
The striker is a first striker, and the first striker is integrally configured with a second striker at a fixed distance.
A seat locking device characterized in that the engaging groove can lock the seat back to two stages of inclination angles by engaging with the first striker or the second striker.

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