CN100509475C - Vehicle seat reclining device - Google Patents
Vehicle seat reclining device Download PDFInfo
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- CN100509475C CN100509475C CNB2007100061024A CN200710006102A CN100509475C CN 100509475 C CN100509475 C CN 100509475C CN B2007100061024 A CNB2007100061024 A CN B2007100061024A CN 200710006102 A CN200710006102 A CN 200710006102A CN 100509475 C CN100509475 C CN 100509475C
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Abstract
A seat reclining device is comprised of a base member connected to one of a seat back and a seat cushion; a rotating member connected to the other of the seat back and the seat cushion; a lock tooth having an external gear engageable with the internal gear of the rotating member; a shaft portion having an inner-periphery guiding surface for swinging the lock tooth on the shaft portion; and a weak portion formed at an end portion of the lock tooth opposite to the external gear across the shaft portion.
Description
Technical field
The present invention relates to be used for the vehicle seat reclining device of adjustable ground fixed seat backrest with respect to the angle of seat cushion, relating in particular to adapt to has big load to impose on the vehicle seat reclining device of the situation of back of seat.
Background technology
As vehicle seat reclining device, existing following known device, promptly this equipment constitutes by main body frame that is installed in seat cushion substrate place and the lid member that is installed in back of seat arm plate place, and this equipment be arranged to can be by making the locking teeth that is connected to back of seat external tooth and lid construction member inside circle perimeter surface on engagement between the internal tooth that forms, limit relative rotation between main body frame and the lid member and the position, angle that keeps back of seat.
For fixedly locked tooth, axial region and a pair of leader form near main body frame, and locking teeth has the depression supporting part, this supporting part can be pivotably connected to axial region and slidingsurface, the guiding surface moving contact that this slidingsurface and leader are right and coaxial with area supported.Core being provided with at internal tooth is used for pushing locking teeth to the outside so that make the cam of external tooth and internal gearing.
In the traditional vehicle seat reclining device that so is provided with, during vehicle collision, by the engagement between internal tooth and the external tooth, locking teeth is subjected to external force that back of seat is along inclined direction rotated.At this moment because locking teeth by axial region and leader to one of support, so just limited the rotation of lid member with respect to main body frame, and therefore back of seat can not rotate from predetermined angular position.
Though the safety strap fixer that is used to support the power that imposes on seat belt is arranged on the central pillar place of car body traditionally, recently but developed the type that the safety strap fixer is arranged on the back of seat place.Therefore, if the safety strap fixer is arranged on the back of seat place, the force of inertia that produces owing to vehicle tenant's weight during the vehicle collision will be delivered to back of seat by seat belt so, and therefore being arranged on the bigger power in central pillar place than safety strap fixer can impose on back of seat forward.Therefore, the vehicle seat reclining device that just requires the safety strap fixer to be arranged on the back of seat place can bear bigger load.
The patent application that is numbered the Japanese publication of 2004-121508 discloses a kind of representative type vehicle seat reclining device.This traditional vehicle seat reclining device is arranged between the outside flanks of one of a pair of leader 112A and 112B and locking teeth 110 and forms the space, so that the load of pointing to the rear impose on back of seat and load by external tooth 110d and internal tooth 107a when the lid member imposes on locking teeth 110, power is at current location spin locking tooth, so that locking teeth 110 enters described space.Therefore, the axial region side of external tooth 110d is pushed to internal tooth 107a, and the joggled strength between external tooth 110d and the internal tooth 107a increases.
Summary of the invention
Yet, if impose on locking teeth 110 towards the rotational force that one of leader 112A and 112B point to by external gear 110d and internal tooth 107a along circumferencial direction, as shown in Figure 3, the supporting part 110c of locking teeth 110 just is pressed towards the outer periphery surface of axial region 111 so.Therefore, locking teeth 110 just is subjected to from the antagonistic force of axial region 111 and rides on the circular outer periphery surface that leans against axial region 111.Since ride lean against above, so bending force is applied on the part of locking teeth 110 adjacent support part 110c, and the part of the contiguous axial region 111 of external tooth 110d is tending towards moving along the direction of separating with internal tooth 107a.Though being arranged to supporting part 110c by the locking teeth 110 that fractures, this legacy equipment keeps engagement between external tooth 110d and the internal tooth 107a, but the disruption characteristic of locking teeth 110 and unstable in this equipment, and the strength variance of this seat reclining device becomes big.
Therefore an object of the present invention is to provide a kind of vehicle seat reclining device that can address the above problem.
According to one aspect of the present invention, provide to be used for back of seat is pivotably connected to the seat reclining device of seat cushion.This seat reclining device comprises: the base component that is connected to one of back of seat and seat cushion; Be connected to another the rotating member in back of seat and the seat cushion, this rotating member is rotatable with respect to base component, forms internal tooth on the inner circumferential surface of rotating member; Locking teeth with external tooth, the internal gearing of this external tooth and rotating member, this locking teeth can be swung along the direction of external tooth and described internal gearing and disengaging with it, and this locking teeth has the supporting part that is formed with the arc supporting surface; With the axial region that base component integrally forms, axial region has inner-periphery guiding surface, on this surface, and the inner-periphery guiding surface moving contact of the area supported of locking teeth and axial region, axial region aligns with external tooth along circumferencial direction around the centre of gration of rotating member; The a pair of leader that integrally forms with base component; Promote the cam that locking teeth makes external tooth and internal gearing; Form at the locking teeth end place relative with crossing over axial region with external tooth than weak part.
By the following detailed description of doing with reference to accompanying drawing, be appreciated that other purpose of the present invention and feature.
Description of drawings
Figure 1A is the view that part is cut open, shown the structure according to the vehicle seat reclining device of the first embodiment of the present invention, and Figure 1B is the cutaway view of cutting open along the arrow I-I direction among Figure 1A.
Fig. 2 is the instruction diagram that is applied to first embodiment under the back of seat situation than heavy load in directed forward.
Fig. 3 is the instruction diagram that is applied to seat reclining device traditional under the situation of back of seat than heavy load in directed forward.
Fig. 4 is the view that part is cut open, has shown the structure according to the vehicle seat reclining device of the second embodiment of the present invention.
Fig. 5 is the view that part is cut open, has shown the structure according to the vehicle seat reclining device of the third embodiment of the present invention.
Fig. 6 is the instruction diagram of the 3rd embodiment under the situation that is applied to back of seat than heavy load of directed forward.
Fig. 7 is the schematic configuration diagram that is applied to usually according to the vehicle seat in the embodiments of the invention.
The specific embodiment
Hereinafter, discussion is according to the embodiment of vehicle seat reclining device of the present invention.
First embodiment
Vehicle seat reclining device 1 according to first embodiment of the invention at first is discussed.As shown in Figure 7, back of seat 3 is connected on the seat cushion 2 of vehicle tenant seat.Back of seat can be swung along the vehicle fore-and-aft direction with respect to seat cushion 2.Main body frame (base component) 5 is connected to seat cushion 2 by substrate 6.On the other hand, lid member (rotating member) 7 is connected to back of seat 3 by arm plate 6.Be provided with the spring that does not show, so that make back of seat 3 towards the place ahead F biasing of seat cushion 2, as shown in Figure 7 along vehicle.
The vehicle seat reclining device 1 that main body frame (base component) 5 and lid member (rotating member) 7 constitute as shown in Figure 1A and 1B.The structure of vehicle seat reclining device 1 hereinafter, is discussed.Shown in Figure 1A and 1B, main body frame 5 forms the shape with ring-shaped depression part by semi-stamping is carried out in the inside of dish.Similarly, lid member 7 also forms the shape with ring-shaped depression part by semi-stamping is carried out in the inside of dish.In addition, internal tooth 7a forms at the inner circumferential surface place of the ring-shaped depression part that has defined lid member 7.Lid member 7 is assembled to the ring-shaped depression part inside of main body frame 5, so that can be coaxial and rotatable with respect to it with main body frame 5.Shown in Figure 1B, the excircle part of lid member 7 and main body frame 5 is got together by ring gripping device 8, can aim at main body frame 5 and can in axial direction not break away from or take place relative rotation with toilet cover member 7.Revolving cam 9 is disposed between main body frame 5 and lid member 7 along its axial direction and in its axial centre.The a pair of locking teeth of swinging 10 places the position, upper and lower of cam 9, so that cross over cam 9 towards each other.Though according to whole embodiment of the present invention, use pair of locking tooth 10 in vehicle seat reclining device 1, they are about the center shaft symmetric arrangement of vehicle seat reclining device 1, their operation is identical.Therefore, hereinafter mainly in the locking teeth among Figure 1A lower one make an explanation.
Along circular orbit guiding locking teeth 10, half (half) cylindricality axial region 11 with inner-periphery guiding surface 11a forms integral body at the inboard and the main body frame 5 of circular orbit for swingably.On the other hand, locking teeth 10 has area supported 10c, and this area supported 10c cuts into semicircle by the part with locking teeth 10 and forms.In addition, be used for guiding the circular orbit neighboring one side place of locking teeth 10 along circular orbit swingably, first and second guide humps (a pair of leader) 12A and 12B and main body frame 5 integrally form.The first and second neighboring guiding surfaces (neighboring guiding surface) 12a and 12b form on the first and second guide hump 12A and 12B respectively so that guiding locking teeth 10.Locking teeth 10 has first and second slip outer periphery surface 10a and the 10b that slide respectively on the first and second neighboring guiding surface 12a and 12b.Because locking teeth 10 is along circular orbit swing, so the first and second neighboring guiding surface 12a and 12b and the first and second slip outer periphery surface 10a and the 10b that arrange around the centres ground of axial region 11 respectively have annular surface.Can form on the surface of the locking teeth 10 relative with internal tooth 7a with internal tooth 7a ingear external tooth 10d, this internal tooth 7a swings along circular orbit.Axial region 11 aligns along the centre of gration of circumferencial direction about lid member (rotating member) 7 with external tooth 10a.
Be provided with cam 9 in order to promote to have the locking teeth 10 of external tooth 10d towards internal tooth 7a, external tooth 10d is used for internal tooth 7a engagement and breaks away from it.By around the center of the centre hole 9e of the cam 9 anticlockwise direction rotating cam 9 along Figure 1A, locking teeth radially is pushed toward the outer side to 10 centers with respect to cam 9, and therefore external tooth 10d meshes with internal tooth 7a.Opposite is, by around the center of the centre hole 9e right-hand revolution cam 9 along Figure 1A, makes the engagement cancellation between external tooth 10d and the internal tooth 7a.By making external tooth 10d and internal tooth 7a engagement, just restricted lid member 7 with respect to the rotation of main body frame 5 and place lock-out state, and back of seat 3 is clamped in the predetermined angular position place with respect to back of seat 3.
Cam 9 has locking cam surface 9a and the locking surperficial 9b that releases cam.Locking cam surface 9a is used for making locking teeth 10 swing and make external tooth 10d and internal tooth 7a engagement along clockwise direction around the center of axial region 11 according to the directed in the counterclockwise direction rotation of cam 9.Locking the surperficial 9b that releases cam is used for making locking teeth 10 swing and make external tooth 10d and internal tooth 7a to break away from the counterclockwise direction around the center of axial region 11 according to the directed rotation of the cw of cam 9.In order to limit moving of the left and right directions of cam 9 in Figure 1A, on each part on the left side of cam 9 and right side, all form slip outer periphery surface 9c, and form moving contact surface 12d at each guide hump 12A place, the left and right sides.Slip outer periphery surface 9c contacts with moving contact surface 12d all the time slidably.Slip outer periphery surface 9c forms circular arc, and this circular arc forms around the centre hole 9e of cam 9.
When back of seat 3 was subjected to pointing to the load of the place ahead F of Fig. 7, lid member 7 just was delivered to locking teeth 10 by the mate between internal tooth 7a and the external tooth 10d with respect to the relative rotational force of main body frame 5.Therefore, locking teeth 10 just is subjected to being used to make the power of locking teeth 10 along the anticlockwise direction rotation of Figure 1A.In order to utilize axial region 11 to support to be subjected to the locking teeth 10 of anticlockwise direction power, just on the apparent surface of the second guide hump 12B and locking teeth 10, form the central side place respectively and be positioned at second guide hump (one of leader) 12B and cam 9 along the diameter inboard around the centre of gration of lid member 7, and along with the second neighboring guiding surface 12b and the second slip outer periphery surface 10b that slide together each other.In outside, forming space, neighboring 17 near the internal tooth 7a and between the second guide hump 12B and the locking teeth 10 along diameter.When locking teeth 10 is subjected to making it along with lid member 7 together along the anti-clockwise rotational force of Figure 1A, above-mentioned configuration will produce moment of rotation, and this moment makes the part of the contiguous axial region 11 of external tooth 10d deform along the direction that external tooth 10 further effectively meshes internal tooth 7a.Therefore, the described part of the contiguous axial region 11 of external tooth 10d further effectively meshes internal tooth 7a, thereby has increased the engagement degree of external tooth 10d and internal tooth 7a.
On the other hand, axial region 11 has the arc inner-periphery guiding surface 11a of support locking tooth 10 swingably.Locking teeth 10 has the arc supporting surface 10c with arc inner-periphery guiding surface 11a moving contact.Though two ends of inner-periphery guiding surface 11a all with two end moving contacts of area supported 10c, between the opposed end of inner-periphery guiding surface 11a and area supported 10c, still form small space.These spaces are set are used under lock-out state, suppressing to cover the backlash that member 7 takes place along hand of rotation with respect to main body frame 5, and when bigger external force is applied on the locking teeth 10, be used for by making locking teeth 10 move the engagement that strengthens between external tooth 10d and the internal tooth 7a towards internal tooth 7a slightly.Locking teeth 10 along with lid member 7 together under the situation of the anticlockwise direction of Figure 1A rotation, owing to impose on locking teeth 10 external force, again because locking teeth 10 is supported by axial region 11, so locking teeth 10 just is subjected to the antagonistic force from axial region 11, and be tending towards being moved along inner-periphery guiding surface 11a.Therefore, just produced and made the right handed moment of locking teeth 10, and the part of the contiguous axial region 11 of external tooth 10d is tending towards separating with internal tooth 7a along figure IA.
Thereby be provided with than weak part 10f.Than weak part 10f role be avoid locking teeth 10 to support by axial region 11 and therefore axial region 11 allow locking teeths 10 around the anticlockwise direction rotation of the centre of gration of lid member 7 along figure IA, thereby when the external force of the directed forward F on being applied to back of seat shown in Figure 73 becomes greater than predetermined force, prevent that external tooth 10d and internal tooth 7a from unclamping.Than weak part 10f is the part of the supporting part of locking teeth 10, is provided with by forming notch portion 10e, fractures or is out of shape thereby be easy to cause to be positioned at end on the opposite side of the external tooth 10d that crosses over axial region 11.Notch portion 10e forms by the part cutting forming V-shape with locking teeth 10, thereby has reduced the width of V-notch towards the center of axial region 11.
Vehicle seat reclining device 1 is arranged on each side of two sides of seat cushion 2.Shown in Figure 1B, two operating axis 15 that are separately positioned on vehicle seat reclining device 1 place couple together by cylindrical shaft 16.Operating axis 15 is assembled together by the centre hole 9b of zigzag structure and cam 9.Operating axis 15 is connected to axle 16 by the sawtooth 16a that sawtooth 15a and cylindrical shaft 16 ends in the formation of operating axis 15 ends form.
Shown in Figure 1B, sawtooth 15b forms at another place, end of operating axis 15.As shown in Figure 7, sawtooth 15b is protruding from substrate 4, and control stalk 20 is connected to sawtooth 15b, and control handle 21 is connected to control stalk 20.
Operating mode according to the vehicle seat reclining device 1 of the first embodiment of the present invention is described subsequently.
Be connected at vehicle seat reclining device 1 under the situation at seat, the bias force of locking spring 19 places cam 9 the anticlockwise direction slew mode shown in the figure IA usually.Therefore, locking teeth 10 is promoted by locking cam surface 9a and is being guided by the first and second guide hump 12A and 12B.In addition, locking teeth 10 is swung along clockwise direction around the center of axial region 11, and places external tooth 10d and the internal tooth 7a ingear state that covers member 7.Therefore that is, seat reclining device 1 places lock-out state and has limited the swing of back of seat 2.
Subsequently, bias force by operation control handle 21 opposing locking springs 19 makes the right-hand revolution of actuating spindle 15 along Fig. 7, connection between the locking teeth 10 of the locking bar cam face 9a of cam 9 and Figure 1A is discharged, and the cam face 9b of locking cancellation promote locking teeth 10 along clockwise direction.Therefore, locking teeth 10 is swung along anticlockwise direction around the center of axial region 11.Engagement between external tooth 10d and the internal tooth 7a has just been eliminated.Therefore seat reclining device 1 places the locking release position, and is connected to the arm plate 3 that cover member 7 and back of seat 3 because bias force forwards the rotating to F along Fig. 7 of the spring of demonstration not.
When back of seat 3 places the position, angle of expectation, bias force by antagonistic spring unclamps from control handle 21 to B rotary seat backrest 3 and the hand by the seat tenant towards the rear, make cam 9 rotation in the counterclockwise direction under the effect of locking spring 19 bias forces, and locking cam surface 9a promotes locking teeth 10 along clockwise direction around the center of axial region 11.Therefore, the external tooth 10d of locking teeth 10 and internal tooth 7a engagement, and seat reclining device 1 turns back to lock-out state.
Subsequently, with reference to the operating mode of Fig. 2 discussion in following situation, promptly vehicle tenant's force of inertia imposes on back of seat 3 by seat belt and points to forwards imposing under the situation of back of seat 3 to the external force of F among Fig. 7 because front part of vehicle bumps.In this case, lid member 7 is tending towards along anticlockwise direction relative rotation taking place with respect to main body frame 5, and shown in the arrow of Figure 1A, and rotational force is delivered to locking teeth 10 by the engagement between internal tooth 7a and the external tooth 10d.Therefore, locking teeth 10 is tending towards the anticlockwise direction rotation along Fig. 2, and locking teeth 10 is supported by the locking cam surface 9a of cam 9, the inner-periphery guiding surface 11a and the second neighboring guiding surface 12b of axial region 11.At this moment, because load is to be applied to axial region 11 from locking teeth 10, so antagonistic force R
1Just be applied to locking teeth 10 from axial region 11.As antagonistic force R
1When becoming greater than predetermined force, will the disconnecting or be out of shape of locking teeth than weak part 10f.Therefore, point to the load of axial regions 11 and point to the antagonistic force R of locking teeths 10 from axial region 11 from locking teeth 10
1All reduce, and cause being used to make the part of the contiguous axial region 11 of external tooth 10d to reduce towards the power that release direction moves from internal tooth 7a.That is, when locking teeth 10 when counterrotating lid member 7 taking place under external force along the circumferential direction rotating with, the end of locking teeth 10 will fracture or be out of shape.Therefore, the supporting part of locking teeth 10 can not move along inner-periphery guiding surface 11a, and the part of the contiguous axial region 1 of external tooth 10d can not be moved and discharges towards cam 9 from internal tooth 7a.Therefore, state that just may steady lock tooth 10 so as suitably to keep external tooth 10d and internal tooth 7a between engagement, and improve the intensity of seat reclining device 1 and the stability of intensity.
In addition, owing to the existence in space, neighboring 17 produces moment of flexure, and the part of the contiguous axial region 11 of the external tooth 10d of locking teeth 10 is tending towards moving along the direction of the engagement enhancing that makes external tooth 10d and internal tooth 7a.Though locking teeth 10 is tending towards further effectively moving with internal tooth 7a ingear direction along the part that makes the contiguous axial region 11 of external tooth 10d, but because the part (only about half of) of the area supported 10c that keeps on the supporting port of locking teeth 10, this part of area supported 10c contacts with axial region 11, thereby when serving as fulcrum, prevent that external tooth 10d and internal tooth 7a from excessively meshing and restriction locking teeth 10 rotates in the counterclockwise direction with the contact of cam face 9a.Therefore, when locking teeth 10 was in stable status, the part of the contiguous axial region 11 of external tooth 10d was certain to and internal tooth 7a engagement, and the engagement between external tooth 10d and the internal tooth 7a reaches stable and is enhanced.
Subsequently, with reference to the operating mode of Fig. 2 discussion in following situation, promptly because vehicle rear-side bumps, and the vehicle tenant just is pressed on the back of seat 3, and the external force at the rear among sensing Fig. 7 imposes on the situation of back of seat 3.In this case, lid member 7 and locking teeth 10 are tending towards with respect to main body frame 5 (direction opposite with the arrow of Fig. 2) rotation along clockwise direction.At this moment, locking teeth 10 is supported by locking cam surface 9a, axial region 11, inner-periphery guiding surface 11a and the first neighboring guiding surface 12a of cam 9.
At this, when external force became big, axial region 11 was promoted by the part of the contiguous external tooth 10d of area supported 10c and deforms.In addition, the first guide hump 12A promotes by the first slip outer periphery surface 10a and deforms.The end of locking teeth 10 becomes with the first guide hump 12A and contacts, and therefore the supporting part of locking teeth 10 is limited and can not be moved further.Therefore, just produced the antagonistic force that points to the direction of the supporting part bending that makes locking teeth 10.Yet, because the end of locking teeth 10 is fractureing than weak part 10f place or being out of shape, so antagonistic force reduces.Therefore, the moment of flexure that imposes on the supporting part of locking teeth 10 reduces.This just can prevent that the position of locking teeth 10 between the first slip outer periphery surface 10a and external tooth 10d from fractureing.Therefore, state that just can steady lock tooth 10, and suitably keep engagement between external tooth 10d and the internal tooth 7a, and improve the intensity of seat reclining device and the stability of intensity.
All surface to locking teeth 10 all applies cure process, because locking teeth 10 comprises external tooth 10d.As cure process, can carry out for example carburizing of heat treatment.Therefore, when locking teeth 10 is subjected to above-mentioned power, locking teeth 10 the fractureing of notch portion 10e that be near at hand than weak part 10f place.By preventing the end carburizing, the end of the supporting part of locking teeth 10 can form softer part.By this processing, deform and can not fracture than weak part 10f.
For with traditional operation and shown in Figure 2 comparing according to inclination of vehicle equipment of the present invention, Fig. 3 has shown the operation of conventional truck reclining device 1.In Fig. 3, when the end that the load that imposes on back of seat 3 of directed forward F becomes big and locking teeth 110 along the circumferential direction relatively moves, just apply from shaft portion 111 to locking teeth 110 big antagonistic force R
2Therefore, the part of locking teeth 110 adjacent shafts parts 111 is ridden and is leaned against on the axial region 111, and bigger bending force imposes on locking teeth 110.On the other hand, owing to impose on the effect of the load of external tooth 110d, locking teeth 110 is tending towards rotating in the counterclockwise direction as fulcrum around the contact point with cam 109.Therefore, the part of the contiguous axial region 111 of external tooth 110d moves to release direction from internal tooth 107a, and the engagement between external tooth 110d and the internal tooth 107a dies down.In addition, when the supporting part of locking teeth 110 fractureed in the place that is approximately the center, locking teeth 110 was tending towards rotating as fulcrum around the contact with cam 110.Therefore, the state labile of locking teeth 110, and the engagement between external tooth 110d and the internal tooth 107a reduces.The difficulty that improves intensity increases thus.
Second embodiment
Vehicle seat reclining device 1 according to the second embodiment of the present invention is described subsequently.When explaining second embodiment, with the similarly explanation omission of part of first embodiment.In according to the first embodiment of the present invention, utilization provides notch 10e between the part of the end of the supporting part of locking teeth 10 and the first slip outer periphery surface 10a, by the centre of gration around locking teeth 10 the width part is narrowed down and form than weak part 10f.On the contrary, according to the second embodiment of the present invention, than weak part 10f by entirely reducing the width L of locking teeth 10 ends
2And form, as shown in Figure 4.
Operating mode according to second embodiment is described subsequently.Omit at this with the first embodiment similar operation.Because second embodiment is arranged to by entirely reducing the width L of locking teeth 10 ends
2Form than weak part 10f, can increase the width L of the first guide hump 12A so just become
1Become greatly by this configuration because be used for the zone of the first protruding 12A of support locking tooth 10, so further improved its intensity.Than center radially the width L of weak part 10f about axial region 11
2Width L with respect to the part between the first slip outer periphery surface 10a and the external tooth 10d
3Be provided with fully for a short time, be certain to fracture or be out of shape so that make than weak part 10f.
The 3rd embodiment
Subsequently, discuss according to the third embodiment of the present invention.At this, explain the structure of the part that is different from first embodiment.
As shown in Figure 5, axial region 11 has the inner-periphery guiding surface 11a of support locking tooth 10 swingably.Inner-periphery guiding surface 11a has a pair of guiding mating surfaces that contacts with the area supported 10a of locking teeth with respect to the centre of gration of lid member 7 on both sides along the circumferential direction.As a guiding mating surfaces, the protruding 11b that is used to absorb stress is in the formation of the opposed side edges place of the external tooth 10d of inner-periphery guiding surface 11a, and as another guiding mating surfaces, inside circumference guiding mating surfaces forms on inner-periphery guiding surface 11a.
The outer periphery surface of projection 11b forms circle, and this circular radius equals the distance at axial region 11 centers, and the area supported 10c moving contact of this outer periphery surface and locking teeth 10.When locking teeth 10 along the rotation of the anticlockwise direction of Fig. 5 and bigger power when locking teeth 10 imposes on protruding 11b, protruding 11b is with regard to locked tooth 10 extruding and be out of shape, and therefore is applied to the antagonistic force R of locking teeth 10 from axial region 11
3Reduce.In addition, being used for part with the contiguous axial region 11 of external tooth 10d moves on to the power of the direction that the engagement between external tooth 10d and the internal tooth 7a weakens is also reduced.
Inside circumference space 18 forms this supporting part 10c relative with inner-periphery guiding surface 11a (between a pair of guiding mating surfaces) between the supporting part 10c of the inner-periphery guiding surface 11a of axial region 11 and locking teeth 10.Inside circumference space 18 forms to such an extent that make the part of bump, adjacent 11b become big.For two kinds of following reasons, inside circumference space 18 forms between inner-periphery guiding surface 11a and area supported 10c.First, if form continuously towards protruding 11b from pars intermedia with the depression circular surface of inner-periphery guiding surface 11a moving contact, similar with traditional semi arch, produce under the situation that relatively moves at locking teeth 10 along clockwise direction with respect to axial region 11, the part of the locking teeth 10 relative with external tooth 10d is ridden on the inner-periphery guiding surface 11a that leans against axial region 11, and the part of the contiguous axial region 11 of external tooth 10d moves to the direction of separating and the engagement between external tooth 10d and the internal tooth 7a is reduced with internal tooth 7a.In order to prevent this displacement of locking teeth 10, formed inside circumference space 18.The second, because the existence in space, neighboring 17 has just produced bending force, this power is pointed to the direction that the part that makes the contiguous axial region 11 of external tooth 10d further effectively meshes internal tooth 7a.In this case, because the existence in inside circumference space 18, the part of external tooth 10 contiguous axial regions 11 is allowed to move towards internal tooth 7a, and therefore can realize more firm engagement between external tooth 10d and the internal tooth 7a smoothly.
The inner periphery surface that contacts with the protruding 11b of the area supported 10c of locking teeth 10 partly forms circular arc, and the radius of this arc equals the distance at axial region 11 centers.By protruding 11b and inside circumference space 18 are set, locking teeth 10 is in two the some places and axial region 11 moving contacts of protruding 11b and the inside circumference guiding mating surfaces relative with protruding 11b.Space along the circumferential direction can suppress backlash thereby this has just reduced lid member 7.
In according to the third embodiment of the present invention, except forming at axial region 11 places the protruding 11b that absorbs stress, also be provided with than weak part 10f, be used for causing at place, the end of the supporting part of the locking teeth 10 relative fractureing or being out of shape with external tooth 11d with respect to axial region 11.Form to such an extent that make the width L at locking teeth 10 ends places than weak part 10f
4Be provided with lessly, similar with second embodiment.This configuration can make than the back side collision of weak part 10f response vehicle and be easy to fracture or be out of shape.
Because the another kind of the 3rd embodiment structure is similar with first embodiment, so it is explained in this omission.
Subsequent discussion is according to the operating mode of the vehicle seat reclining device 1 of the third embodiment of the present invention.
Explanation is imposed on the operating mode under the situation of back of seat 3 in the load of directed forward.In this case, lid member 7 is tending towards along anticlockwise direction relative rotation taking place with respect to main body frame 5, and therefore rotational force is delivered to locking teeth 10 by the engagement between internal tooth 7a and the external tooth 10d.Locking teeth 10 is tending towards the anticlockwise direction rotation along Fig. 5.At this moment, locking teeth 10 is supported by the protruding 11b and the second neighboring guiding surface 12b of locking cam surface 9a, axial region 11.In addition, two of locking teeth 10 points contact with axial region 11.Two points are protruding 11b and the inside circumference guiding mating surfaces relative with protruding 11b.
When the directed forward load that imposes on back of seat 3 became big, protruding 11b was with regard to deformation in compression, and as shown in Figure 6, and the contact portion between the locking teeth 10 and the second neighboring guiding surface 12b deforms.Because protruding 11b is deformation in compression and absorption stress along the circumferential direction, so be applied to the antagonistic force R of locking teeth 10 from protruding 11b
3Reduce.Therefore, the flexure stress that points to the direction that makes locking teeth 10 bendings also reduces, and owing to applying of bending force suppressed fractureing of locking teeth 10.
Point to the anti-clockwise direction because the stress that produces has along circumference, prevent to produce following phenomenon, thereby promptly the part of the contiguous axial region 11 of external tooth 10d is separated the ingear phenomenon that reduces between external tooth 10d and the internal tooth 7a with internal tooth 7a.Promptly, even locking teeth 10 is moved along anticlockwise direction with respect to axial region 11, owing to have the inside circumference space 18 of the protruding 10b that is close to locking teeth 10 and do not have the ring-shaped depression part, so locking teeth 10 is ridden on the inner-periphery guiding surface 11a that leans against axial region 11 never.Therefore, locking teeth 10 can be owing to riding by being subjected to bigger bending force and therefore can not fractureing.In addition, thus this configuration can prevent the part of the contiguous axial region 11 of external tooth 10d really separates the ingear phenomenon that reduces between external tooth 10d and the internal tooth 7a with internal tooth 7a.
Because the existence in space, neighboring 17 produced the part that makes the contiguous axial region 11 of external tooth 10d along with the further moment of flexure that moves of ingear direction effectively of internal tooth 7a, and because be provided with the inside circumference space 18 that allows locking teeth 10 motions, axial region 11 just can not prevent the motion of locking teeth 10.This has just improved stronger engagement between the part of contiguous axial region 11 of external tooth 10d and internal tooth 7a.
The directed forward load of back of seat 3 further increases and this load can not only absorb by expression lobes 11b if impose on, so stress just concentrate on into the end of locking teeth 10 than weak part 10f place.Because have width L
4Than the bending strength of weak part 10f a little less than, excessive load will make than weak part 10f and fracture or be out of shape so.Therefore, locking teeth 10 can not be subjected to the big antagonistic force from axial region 11, thereby and is bound to prevent that the part of the contiguous axial region 11 of external tooth 10d from separating the ingear phenomenon that reduces between external tooth 10d and the internal tooth 7a with internal tooth 7a.
Though shown and be described as forming than weak part 10f according to the third embodiment of the present invention, also can form than weak part 10f by providing notch portion at the place, end or utilizing soft material to form the end by the width that entirely reduces locking teeth 10 ends.
Though shown and be described as when forward load imposes on back of seat 3 according to the third embodiment of the present invention, rotation relatively takes place with respect to main body frame 5 in lid member 7 in the counterclockwise direction, also can arrange on the contrary, promptly when directed backward load imposed on back of seat 3, rotation relatively took place with respect to main body frame 5 in lid member 7 in the counterclockwise direction.
The application is based on the Japanese patent application of submitting on June 29th, 2006 that is numbered 2006-21889 that is numbered 2006-178888 and submitted on January 31st, 2006.The full content of these Japanese patent applications is hereby incorporated by.
Though by as above having described the present invention with reference to some embodiments of the present invention, the present invention is not limited to aforesaid embodiment.Based on above-mentioned teaching, those skilled in the art can find out the modifications and variations of aforesaid embodiment.Scope of the present invention defines with reference to following claim.
Claims (10)
1. one kind is used for back of seat is pivotably connected to the seat reclining device of seat cushion, and this seat reclining device comprises:
Be connected to the base component of one of back of seat and seat cushion;
Be connected to another the rotating member in back of seat and the seat cushion, this rotating member is rotatable with respect to base component, forms internal tooth on the inner circumferential surface of rotating member;
Locking teeth with external tooth, the internal gearing of this external tooth and rotating member, this locking teeth can be swung along the direction of external tooth and internal gearing and disengaging with it, and this locking teeth has the supporting part that is formed with the arc supporting surface;
The axial region that integrally forms with base component, described axial region has inner-periphery guiding surface, on this surface, the inner-periphery guiding surface moving contact of the area supported of locking teeth and axial region, described axial region aligns with external tooth along circumferencial direction with respect to the centre of gration of rotating member;
The a pair of leader that integrally forms with base component;
Promote locking teeth and make the cam of described external tooth and described internal gearing; With
Cross over described axial region and form at place, the locking teeth end relative with external tooth than weak part, should can cause that described end produced fracture or distortion than weak part.
2. seat as claimed in claim 1 reclining device, it is characterized in that, describedly cross over described axial region and be arranged in place, end relative in the locking teeth with described external tooth than weak part, in addition, in described locking teeth, the slip outer periphery surface is arranged, the corresponding neighboring guiding surface moving contact of this slip outer periphery surface and described leader than the described location arrangements radially more inside than weak part.
3. seat as claimed in claim 1 reclining device is characterized in that, describedly forms with respect to the width of the other parts of locking teeth by reducing the locking teeth end than weak part.
4. seat as claimed in claim 1 reclining device is characterized in that, describedly compares with the other parts of locking teeth than weak part, and the intensity of formation is softer.
5. seat as claimed in claim 1 reclining device is characterized in that, when having produced when making rotating member with respect to base component counterrotating load take place, described locking teeth is supported by one of leader and axial region.
6. seat as claimed in claim 5 reclining device is characterized in that, a pair of guiding mating surfaces that contacts with locking teeth is served as in two ends of the inner-periphery guiding surface of described axial region.
7. seat as claimed in claim 6 reclining device is characterized in that, locates at one of guiding mating surfaces relative with external tooth, and the projection and the described axial region that are used to absorb stress integrally form.
8. seat as claimed in claim 7 reclining device is characterized in that, space, inside circumference side is forming between the area supported relative with inner-periphery guiding surface of inner-periphery guiding surface and locking teeth and between the described a pair of guiding mating surfaces.
9. seat as claimed in claim 8 reclining device, it is characterized in that, be used on the surface of one of leader of locking teeth, forming, and be formed with the neighboring side gap between one of the place, internal tooth side of peripheral side guiding surface and leader and the locking teeth outside with the neighboring guiding surface of locking teeth moving contact.
10. vehicle seat reclining device comprises:
Seat cushion;
Be pivotably connected to the back of seat of seat cushion;
Be connected to the base component of one of back of seat and seat cushion;
Be connected to another the rotating member in back of seat and the seat cushion, this rotating member is rotatable with respect to base component, forms internal tooth on the inner circumferential surface of rotating member;
Locking teeth have can with the external tooth of the internal gearing of rotating member, locking teeth can be swung along the direction that external tooth and internal gearing and external tooth and internal tooth break away from, locking teeth has the supporting part that is formed with the arc supporting surface;
With the axial region that base component integrally forms, this axial region has inner-periphery guiding surface, on this inner-periphery guiding surface, and the inner-periphery guiding surface moving contact of the area supported of locking teeth and described axial region; And
Promote locking teeth and make the cam of external tooth and internal gearing;
Wherein, locking teeth has than weak part, should cross over the axial region locking teeth end place formation relative with external tooth than weak part, should can cause that described end produced fracture or distortion than weak part.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006021889 | 2006-01-31 | ||
| JP2006021889 | 2006-01-31 | ||
| JP2006178888 | 2006-06-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101011944A CN101011944A (en) | 2007-08-08 |
| CN100509475C true CN100509475C (en) | 2009-07-08 |
Family
ID=38699721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100061024A Expired - Fee Related CN100509475C (en) | 2006-01-31 | 2007-01-31 | Vehicle seat reclining device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100509475C (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1245435A1 (en) * | 2001-03-30 | 2002-10-02 | Fujikiko Kabushiki Kaisha | Reclining device and method for manufacturing the same |
| JP2002291563A (en) * | 2001-03-30 | 2002-10-08 | Fuji Kiko Co Ltd | Seat reclining device for vehicle |
| JP2004121508A (en) * | 2002-10-01 | 2004-04-22 | Fuji Kiko Co Ltd | Car sheet reclining device |
-
2007
- 2007-01-31 CN CNB2007100061024A patent/CN100509475C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1245435A1 (en) * | 2001-03-30 | 2002-10-02 | Fujikiko Kabushiki Kaisha | Reclining device and method for manufacturing the same |
| JP2002291563A (en) * | 2001-03-30 | 2002-10-08 | Fuji Kiko Co Ltd | Seat reclining device for vehicle |
| JP2004121508A (en) * | 2002-10-01 | 2004-04-22 | Fuji Kiko Co Ltd | Car sheet reclining device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101011944A (en) | 2007-08-08 |
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Effective date of registration: 20171229 Address after: Shizuoka Patentee after: TF Metal Corporation Address before: Shizuoka Patentee before: Fuji Kiko Co., Ltd. |
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Granted publication date: 20090708 Termination date: 20200131 |