JP4020390B2 - Seat reclining device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seat reclining device (including a seat tumble mechanism) having a vehicle load adjustment function.
[0002]
[Prior art]
In a conventional seat reclining device, a leaf spring is mounted on an operation shaft provided through the lock mechanism and the casing, and the leaf spring is locked to the casing and the operation shaft. Therefore, when the operation shaft is rotated forward and backward by the operation (rotation) of the handle, the locking and unlocking of the lock mechanism and the tension and relaxation (release of tension) of the leaf spring are achieved by the forward and reverse rotation. By this operation, the seat is configured to recline (folding and / or returning adjustment of the seat) at a desired speed and / or load, and this reclining configuration depends solely on the repulsive force of the leaf spring. Therefore, recently, there is a problem in the case of folding or the like, or there are conditions required at that time. This problem and the required conditions are substantially the same, and relate to, for example, seat impact, speed adjustment / mode, and various types of vehicles.
[0003]
An example will be described below. First, there is a problem with impact. That is, there are damages such as injury, property damage accidents, or fears of the sheet itself against the weak persons such as infants, elderly people, sick persons, etc., and damage thrown out of the sheet. Next, there is a problem relating to the speed adjustment of the seat. That is, when it is desired to quickly fold and / or return the seat (standing at an appropriate tilt angle), the seat cannot be folded and / or returned with speed and / or speed change. It is. There is also a problem with various usage modes for the sheet. That is, there may be a point related to a speedy operation at the initial stage of operation such as folding or standing, or a point related to a gradual operation when the operation is completed such as standing or accommodating.
[0004]
On the other hand, recently, various types of vehicles (change from passenger cars to wagons, one-box cars or minivans) and diversification of seat configurations and demands (full seat flattening and seat back to the front) In this case, it has become an urgent need to meet this demand with regard to improvement in the speed of the seat back on the way, control of the speed of the seat, and the like.
[0005]
Next, prior documents relating to this type of seat reclining device are listed. Document (1) is a reclining device disclosed in Japanese Patent Application Laid-Open No. 1-107708, and is configured to slow the return rotation of the seat back by the return spring by restricting the viscous grease on the movement of the rotating side member. However, since this literature (1) is the structure using viscous grease, it is necessary to ensure the sealing property of a casing. In addition, it has a special structure, and there are problems that require labor or experience in manufacturing, assembly, filling of viscous grease, etc., and problems of durability of viscous grease. Reference (2) is a reclining device disclosed in Japanese Patent Application Laid-Open No. 9-252868, in which a friction force of a friction spring disposed in a drum-like cover of a return spring of a seat back is generated by a return by the return spring. When the seat back is returned to the front from the backward tilt position, the seat back return speed is reduced. Further, Document (3) is a reclining device of Japanese Utility Model Publication No. Hei 6-70642, in which a first spiral spring that urges the seat back forward from a backward tilt position to a forward tilt position, and the seat back from the forward tilt position. A second spiral spring that urges backward between neutral positions is provided. The second spiral spring is weaker than the urging force of the first spiral spring, and the impact of the seatback is changed by changing the rotation speed. It is a configuration that relaxes. However, since the references (2) and (3) are provided with a spring that regulates the return spring, the structure is complicated. In addition, since the structure is controlled by adjusting the repulsive force between the return spring and the spring, it is required to be structurally more precise than the necessity to ensure this repulsive force adjustment, and the assembly of this device. However, there are problems such as requiring carefulness and skill. Further, considering the structure, there are problems such as leaving a problem or inviting an increase in cost for the smooth movement of the seat. Reference (4) is a seat reclining device disclosed in Japanese Patent Application Laid-Open No. 2002-101997. A lower arm held on the seat cushion side of a seat, an upper arm supported rotatably on the lower arm and held on the seat back side, The lock mechanism that restricts the rotation of the upper arm relative to the lower arm, the return spring that exerts a force on the lower arm to tilt the upper arm forward of the seat, and the lever spring that restricts the movement of the lever. As a result, the structure becomes complicated. The load cannot be adjusted.
[0006]
[Problems to be solved by the invention]
The present applicant has already filed at least five patent applications in order to improve the prior art and the inventions and devices of the above-mentioned documents (1) to (4). The outline is as follows: “A lock mechanism that controls locking and unlocking of the reclining mechanism, a casing provided in the locking mechanism, a spring that is fixedly locked to one end of the casing and movably locked to the other end, and this spring Is a seat reclining device having a structure provided with a movement groove for controlling the movement of the movement, an operating means for operating the spring, a regulating means for regulating the spring, and an adjusting means for adjusting the load of the regulating means.
[0007]
These inventions are provided with a mechanism sufficient to solve the above-mentioned problems. The present invention intends to further develop these inventions and meet the demand for a seat reclining device intended for a structure capable of more precise load adjustment, or for simplification of manufacturing and structure.
[0008]
[Means for Solving the Problems]
The invention of claim 1 improves the casing and the spring, and regulates the spring to gently fold and / or stand up and move the seat, thereby eliminating various impacts, or against this impact. Based on the above, it is intended to eliminate the above-mentioned adverse effects, and to facilitate and speed up the processing of the spring. In particular, the invention of claim 1 employs a restricting means capable of moving and moving the spring to adjust the load (fine adjustment), and to avoid the spring reluctance (unstable tension and / or relaxation). Secure seat movement and smooth movement as described above, or provide a simple device to provide a seat reclining device that can handle a specific vehicle type, improve versatility, and It is intended to provide a shaped seat reclining device.
[0009]
The first aspect of the present invention provides a lock mechanism that controls locking and unlocking of the reclining mechanism, a base fixed to the lock mechanism, a fixed side locking end locked to the base, and a groove and a notch in the base A front-side annular spring having a movable side locking end movably provided on a moving component means such as a multistage first regulating portion provided on at least one surface of the spring, and the first regulating portion A seat reclining device configured by a regulating means having a multistage second regulating portion to be engaged, an operating means provided on the base for operating expansion and contraction of the spring, and a cover provided on the base,
The restricting means includes a base portion to be engaged with a restricting recess portion (moving and moving restricting guide) such as a groove, a recess portion, and a protrusion provided on the base, a main body portion provided on the base portion, and provided on the main body portion. The second restricting portion is configured to follow the spring, and applies a load to the spring so that the seat that rises and falls through the second restricting portion and the spring. A seat reclining device that regulates movement .
[0010]
The invention of claim 2 is intended to provide a seat reclining device that achieves the object of claim 1 and that is useful for more precise load adjustment and movement or return of the seat.
[0011]
Claim 2 is the seat reclining device according to claim 1,
The seat reclining device is characterized in that regulation recesses such as grooves, recesses, and protrusions provided in the base function as regulation guides for moving and moving the base .
[0012]
The invention of claim 3 achieves the object of claim 1 and intends to provide an optimum regulating means for achieving the object of claim 1.
[0013]
Claim 3 is the seat reclining device according to claim 1,
The restricting means is provided in a state of being separated from the base , and the restricting recesses such as grooves, recesses, and protrusions provided in the base function as a restricting guide for moving and moving the base. This is a seat reclining device.
[0014]
The invention of claim 4 achieves the object of claim 1 and is intended to provide an optimum base and cover for achieving the object of claim 1.
[0015]
Claim 4 is the seat reclining device according to claim 1,
The seat reclining device is characterized in that a concave portion is provided around the base, and a convex portion provided around the cover is engageable with the concave portion.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0017]
FIG. 1 is a schematic diagram of an embodiment in which the present invention is applied to a seat reclining device, and FIG. 2 is a schematic diagram of an embodiment in which the present invention is applied to a seat tumble mechanism. (B), (c) shows each folded state, and FIG. 3 is a schematic diagram of an example in which the examples of FIG. 1 and FIG. 2 are merged. (A) is an upright state, (b), (c) FIG. 4 shows the relationship between the base body and the spring, showing a partially omitted front view, FIG. 5 is a rear view of FIG. 4, FIG. 6 is a front view of the cover, and FIG. FIG. 8 is a view showing the connection relationship between the hook piece of the base and the leg of the lock mechanism, FIG. 9 is an enlarged front view of a partially broken view showing the relationship between the spring and the regulating means, and FIG. (A) to (c) are enlarged front views of a part of the defect showing another relationship between the spring and the regulating means. (B) shows another example of the tension state of the spring, (b) shows another example of the tension state of the spring, and FIG. 11 shows a partial defect showing still another relationship between the spring and the regulating means. Enlarged front view, FIGS. 12 (a) to 12 (d) are enlarged front views of partially missing portions showing different relationships between the spring and the regulating means, respectively, (a) is the relaxed state of the spring, and (b) Is the tension state of the spring, (c) is the extended state of the spring, (d) is another example in the same figure or another example, FIGS. 13 (a) and (b) are examples of the spring. 14 (a) to 14 (f) are schematic views showing the relationship between the first restricting portion of the spring and the second restricting portion of the restricting means, and FIG. 15 is another example of the present invention. FIG. 16 is a front view of the whole with a part omitted, showing another example of a plate, and FIG. In the schematic diagram, (A) shows a standing state, (B), (C) shows each folded state, and FIG. 17 shows a change in seat load, a spring effect and timing, or a one-way method and a two-way method. It is a chart explaining the difference.
[0018]
In the figure, A is a vehicle seat, A1 is a seat cushion of seat A, and A2 is a seat back of seat A. B denotes a lock mechanism provided with a lock / unlock mechanism for controlling the standing and folding of the seat A. In the figure, C indicates a rail, and D indicates a tumble mechanism.
[0019]
The embodiment shown in FIGS. 4 to 14 will be described.
[0020]
Reference numeral 1 denotes a base including an annular wall surface fixed to a main body B1 constituting the lock mechanism B with a fixing member 2 interposed therebetween. The base 1 will be described in detail. The base 1 has a hook piece 100 for locking the base 1 to the fixing member 2 of the main body B1, and a fixed side locking for locking a locking end (part) 300 on the fixed side (center portion) of the spring 3. Part 101 and a bulging boss part 102 for securing the locking end 300 on the fixed side of the spring 3 (in the case of a metal, it is a standing piece by pressing), and on the movable side (free end part) of the spring 3 A movable body 103 that can be moved by an operating rod to be described later for locking the locking end 301, a bulging boss portion 102 for fixing the locking end 300 on the fixed side of the spring 3, and a frame portion provided around the base 1 104. In the figure, reference numeral 105 denotes a guide piece for the spring 3. This base 1 is intended for resin integral molding, but is made of metal if necessary. The movable body 103 moves along an annular groove 106 formed in the base 1 and guide means such as a notch. Note that the example of FIG. 15 is an example in which the cover 1 has a plate shape, and is made of iron plate, resin, or the like. In the case of a steel plate, the fixed side locking portion 101, the bulging boss portion 102, etc. are ideally punched and press-molded. The reason is that there are advantages such as easy molding / processing, low cost, strength, material saving / easy handling.
[0021]
The spring 3 is provided with a first restricting portion 4. The first restricting portion 4 gives appropriate restriction to the spring 3 to control the speed, load and the like in contraction and / or expansion ( Intended to control). Desirable shapes are structures such as a waveform, a deformation waveform, a regulation waveform, a one-way waveform, irregularities, a satin finish, and a protrusion. As shown in FIG. 13, the first restricting portion 4 is basically configured to be provided in the longitudinal direction of the spring 3 so as to be common to all the drawings. As shown in (a), an example in which the first restricting part 4 is provided at the center in the longitudinal direction and the flat part 6 is provided, as shown in (b), the first restricting part 4 is provided in the longitudinal direction, and the width Examples provided in the whole, other examples not shown, but the first restricting portion 4 is provided in the longitudinal direction and provided on the end face, examples where (A), (B), etc. are also provided, and examples such as a plane and a single-sided system not shown It is. FIG. 14 is an example for explaining the relationship between the first restricting portion 4 of the spring 3 and the second restricting portion of the restricting means described later. By using these various combinations, the speed adjustment of the seat A, It is possible to respond to load adjustments or desired modes, etc., to be useful, to be able to comply with practical use, to be compatible with various vehicle types, seat forms, various uses of seats, or fields of use There is a feature such as being able to expand. The illustrated example will be described below. (B) is one flat and the other is corrugated, (c) is a one-way locking type, (d) is an anti-corrugated wave, and (e) is the other A one-way locking type, (f) is a face-to-face configuration and shows a one-way locking structure type, and a necessary configuration is selected. Thereby, the movement of the seat A (the seat cushion A1 and / or the seat back A2) is regulated. In the figure, 5 indicates a first restricting portion provided on the other surface of the spring 3. Accordingly, there are an example provided on one surface of the spring 3, an example provided on both surfaces (not shown), and the like.
[0022]
Reference numeral 10 is a restricting means (regulator means: elastic locking piece) provided on the base 1 so as to be movable and movable. In the examples shown in FIGS. 9 to 11, the restricting means 10 includes grooves, recesses, A base 11 engaged with a restriction recess 1000 (a restriction guide for movement and movement) such as a ridge, a main body 12 provided on the base 11, and a second restriction 13 provided on the main body 12. It is configured to operate following the spring 3, and applies a load to the spring 3 to restrict the movement of the seat A that undulates by the spring 3. Appropriate restriction is applied to the spring 3 through sliding contact (friction resistance) or engagement (engagement) between the first restricting portion 4 and the second restricting portion 13, and the speed in contraction and / or expansion, Has the effect of controlling the load. A desirable shape has a structure such as a waveform, a deformation waveform, a regulation waveform, a one-way waveform, unevenness, a satin, a protrusion, or a flat surface. The spring 3 is appropriately regulated as described above by using the second regulating portion 13 and the first regulating portion 4 of the spring 3 and utilizing sliding contact (friction resistance) or the like. Further, in the example of the elastic form, the restricting means 10 is contacted / separated or returned via the reaction force of the restricting means 10. 9 to 11 is provided so that the base 11 moves forward and backward in the restricting recess 1000 and is rotatable (rollable) against the drawing, and moves to the center of the spring 3. And it can cope with deformation. Therefore, the spring 3 (seat A) can always be regulated by the regulating means 10. In the example shown in FIG. 12, a rubber spring 15 (elastic body) is provided on the inner cylinder portion 1001 provided on the base 1, and the rubber spring 15 is moved and movable. According to In the figure, 16 is a pressing piece that presses against one surface of the spring 3 and ensures the reluctance of the spring 3, the contact between the first restricting portion 4 and the second restricting portion 13, and the reliable restriction. The second restricting portion in FIG. 9 shows an example of molding with a metal plate, and the example in FIG. 12 shows each example in which the restricting means 10 is made of resin, and the strength, ease of processing, weight reduction, Intended for wear resistance, cost reduction, versatility, regulation adjustment, etc. In the example of FIG. 12, (A) shows a state in which the spring 3 is relaxed and the seat A is tilted forward. FIG. 7B shows a state where the seat A stands up or falls backward while the spring 3 is in tension. FIG. 8C shows a state in which the second restricting portion 13 of the restricting means 10 follows (moves) and moves due to the tension of the spring 3, and the spring 22 extends and moves. showed that. Further, FIG. 4D shows another example in the same figure or another example. Further, in the example of FIG. 11, an example is shown in which the second restricting portion 13 in the form of a part is attached to the main body portion 12 so as to be removable, and convenience, ease of replacement, change of load, and the like are intended. In the figure, reference numeral 14 denotes a spring provided in the inner cylindrical portion 1001 of the base 1, and this spring 14 governs the movement of the regulating means 10. FIG. 12 (a) shows a state where the seat A has fallen forward while the rubber spring 15 is relaxed. In the example of FIG. 12, (B) shows a state in which the seat A stands up or falls backward while the rubber spring 15 is in tension. In this example, (b) is a state in which the second regulating portion 13 of the regulating means 10 follows (moves) and moves due to the tension of the rubber spring 15, and the rubber spring 15 extends, And the state which moved is shown. In FIG. 12C, a gap for movement and / or movement formed between the rubber spring 15 and the flange of the inner cylindrical portion 1001 is formed large, and the movement and / or movement of the rubber spring 15 is made. This is an example of expanding the range. In the figure, (A) shows the direction of movement of the base 11, and (B) shows the direction of movement of the second restricting unit 13.
[0023]
Reference numeral 20 denotes an adjusting means for adjusting the restricting means 10. The adjusting means 20 includes a screw 21 that is screwed into an outer cylinder 107 provided on the base 1, and a spring provided between the screw 21 and the main body 12. 22 and adjusting the degree of contact between the first restricting portion 4 and the second restricting portion 13 through the strength adjustment of the spring 22 by the advancement and retreat of the screw 21 to adjust the load and the seat A. Responding to movements, safety, wear of parts, replacement in case of failure, etc., or requests of each person. In the figure, reference numeral 108 denotes a cover provided on the outer cylinder portion 107. The screw 21 adjusts the repulsive force of the spring 22 or the rubber spring 15 and regulates or adjusts the movement of the sheet A.
[0024]
Reference numeral 30 denotes a cover, and when the cover 30 is made of resin, the protrusion 3000 of the cover 30 is fitted into the hole 109 provided in the base 1, and the two are integrated. In addition to this fitting, there are crimping, welding (for example, when the cover 30 is made of metal), or screwing. As in this example, the example in which the cover 30 is provided has the following characteristics. [1] The movement of the spring 3 to the outside (arrow shown in the drawing) is eliminated, and an accurate movement can be secured. [2] By assembling the cover 30 by the inlay method, the strength of the bulging boss portion 102 and the reliable and smooth movement of the spring 3 can be ensured. [3] The strength of the seat reclining device can be increased. [4] Since the strength can be increased by [3] , the base 1, the bulging boss portion 102, etc. can be made thinner and lighter. [5] Useful as an operating cover for the spring 3. [6] Useful for eliminating injuries caused by the movement of the spring 3, etc., and intrusion accidents. Furthermore, [7] it is useful for improving aesthetics. Further, the center protrusion 3000 a of the cover 30 is engaged with the hole of the base 1.
[0025]
Next, the operation of the spring 3 by the rotation of the base 1 and the movement of the seat A will be described. That is, the base 1 is provided with an operation handle 40 and an operation rod 4000 that constitute the operation means. The operation of the operation handle 40 causes the base 1 to move through the movement of the operation rod 400 and the operation arm 4001. Rotates and unlocks the lock mechanism B. Spring 3 repel through the unlocking, locking end 300 of the spring 3, shifting from left to right toward the groove 106 of the base 1 in accordance with the movement of the movable body 103, Opposition the right Then, the base 1 and the lock mechanism B are rotated (rotated clockwise) via a repulsive force. As the base 1 and the lock mechanism B rotate, the sheets A are sequentially folded. In this example, the repulsive force of the spring 3 is suppressed by the restriction of the first restricting portion 4 and the second restricting portion 13 due to the return of the spring 3, and the rapid folding of the seat A can be avoided. Note that the adjustment of the folding speed (or return speed) and / or the standing speed of the seat A and the position where the seat A is adjusted are related to the first restricting portion 4 and the second restricting portion 13 of the spring 3. The repulsive force of the spring 3 and the positional relationship between the two can be changed freely. Further, by returning the sheet A, the locking end 301 of the spring 3, shifting from right to left toward the groove 106 of the base 1, and衝止this left, further compressing the base 1 and the locking mechanism B rotates backward (rotates counterclockwise). By reverse rotation of the base 1 and the lock mechanism B, the sheets A are erected sequentially. At the time of standing, the compression force (repulsive force) is suppressed by the restriction of the first restricting portion 4 and the second restricting portion 13 of the spring 3, and a sudden standing and / or folding of the sheet A can be avoided. In the figure, reference numeral 3001 denotes a restriction recess in which the base 11 of the restriction means 10 is engaged. Reference numeral 3002 denotes a bulging portion, which secures the wall thickness by providing the regulating recess 3001.
[0026]
It should be noted that the present invention can be applied to both the 1-way method and the 2-way method. The two-way method is a method in which the restriction is applied to both the fall of the seat back and the return, and the one-way method is a method in which the restriction is applied in the return direction of the seat back. This method is determined by, for example, the vehicle type, the size of the vehicle, the type, the structure of the seat, or the preference. In the figure, reference numeral 41 denotes a seat belt.
[0027]
The relationship between the first restricting portion 4 of the spring 3 and the second restricting portion 13 of the restricting means 10 described above includes the example shown in FIG. Further, as shown in Japanese Patent Application No. 2002-245065, as shown in FIG. 9 and FIG. 12 to FIG. 24, the restricting means 10 is a holding and moving type (combination of moving member, spring, groove structure and holding body), holding type, The configuration of is also possible. In addition, there exists an example which provides the 2nd control part 13 in the base 1 like FIG. 4, FIG. 10 shown by Japanese Patent Application No. 2002-224725, In this structure, it is not necessary to provide the control means 10 separately, and it is useful. Can contribute to cost reduction, simplification, weight reduction, and the like. Further, the restricting means 10 allows a regulated portion (not shown) such as a sphere or an adjustment body provided in a casing (not shown) of the base 1 shown in Japanese Patent Application No. 2002-377144 to be able to contact and separate from the spring 3. A configuration for regulating the spring 3 is also possible. In this application, it is intended to reduce the cost, simplify the structure, diversify the regulations, and make it versatile. In addition, a second restricting portion (not shown) such as a sphere or an adjusting body is used as a swinging type as a one-way method or a two-way method. A basic patent application is described in Japanese Patent Application No. 2002-175702. The patent application with individual contents is described in Japanese Patent Application No. 2002-304767. Therefore, there can be contents that can be adopted in the present invention among the techniques described in the respective applications.
[0028]
The restricting means 10 has a configuration in which the second restricting portion 13 of FIGS. 8 to 16 shown in Japanese Patent Application No. 2003-32336 is detachably provided on the restricting means 10, facilitating manufacturing, and the second restricting portion 13. There is a feature that can cope with easy change or change of regulation of the sheet A. Further, it is possible to adopt a configuration in which the spring 3 shown in FIGS. 20 to 24 of this application is clamped with a gripping piece, and a groove formed by recessing or projecting the holding piece on the base 1 is moved. It is useful for reliable and smooth regulation.
[0029]
FIG. 16 shows an example in which the cover 30 of the present invention is integrated with the exterior cover 50. Note that the cover 30 can be replaced with the exterior cover 50, which is advantageous for reducing the number of parts and for easy attachment. The shape, structure, and the like of the exterior cover 50 are examples.
[0030]
【The invention's effect】
The invention of claim 1 includes a lock mechanism for controlling locking and unlocking of the reclining mechanism, a base fixed to the lock mechanism, a fixed side locking end locked to the base, a groove in the base, a notch, and the like A movable-side engaging end provided movably on the moving component means, and a ring-shaped spring in front view, a multistage first restricting portion provided on at least one surface of the spring, and a first restricting portion . A seat reclining device configured by a restriction means having a multistage second restriction portion , an operation means provided on a base for operating expansion and contraction of a spring, and a cover provided on the base,
The restricting means includes a base engaged with a restricting recess (moving and movable restricting guide) such as a groove, a recess, and a protrusion provided on the base, a main body provided on the base, and a second provided on the main body. The second restricting portion is configured to follow the spring and apply a load to the spring to restrict the movement of the undulating seat via the second restricting portion and the spring. Is a seat reclining device.
[0031]
Accordingly, the first aspect of the present invention can eliminate various impacts by improving the casing and the spring and regulating the spring to gently fold and / or stand up, move, etc. Based on the above, it is possible to eliminate the above-mentioned problems, and to facilitate and speed up the processing of the spring. In particular, the invention of claim 1 employs a restricting means capable of moving and moving the spring so that the load can be adjusted (finely adjusted), and the spring can be prevented from loosening (unstable tension and / or relaxation). In addition, it is possible to ensure the reliable movement of the seat and the smooth movement as described above, or to provide a simple device to provide a seat reclining device that can handle a specific vehicle type, and to improve versatility, independently. A shaped seat reclining device can be provided.
[0032]
The invention of claim 2 is the seat reclining device according to claim 1,
A regulation recess such as a groove, a recess, and a protrusion provided in the base functions as a regulation guide for moving and moving the base, and is a seat reclining device.
[0033]
Therefore, the second aspect of the present invention is characterized in that the object of the first aspect can be achieved and a seat reclining device useful for more precise load adjustment and movement or return of the seat can be provided.
[0034]
The invention of claim 3 is the seat reclining device according to claim 1,
The restricting means is provided in a state of being separated from the base , and the restricting recesses such as grooves, recesses, and protrusions provided on the base function as a restricting guide for moving and moving the base. It is a reclining device.
[0035]
Accordingly, the third aspect achieves the object of the first aspect and can provide the optimum regulating means for achieving the object of the first aspect.
[0036]
The invention of claim 4 is the seat reclining device according to claim 1,
The seat reclining device is characterized in that a concave portion is provided around the base, and a convex portion provided around the cover is engageable with the concave portion.
[0037]
Accordingly, claim 4 achieves the object of claim 1 and can provide an optimal base and cover for achieving the object of claim 1.
[Brief description of the drawings]
FIG. 1 is a schematic scale diagram of an embodiment in which the present invention is adopted in a seat reclining device. FIG. 2 is a scale schematic diagram of an embodiment in which the present invention is adopted in a seat tumble mechanism. (B) and (C) show each folded state.
FIGS. 3A and 3B are schematic views of an embodiment in which the examples of FIGS. 1 and 2 are combined. FIG. 3A shows a standing state, and FIGS. 3B and 3C show folded states.
FIG. 4 is a front view of the base body and the spring, showing the relationship between the base body and partly omitted. FIG. 5 is a rear view of FIG. 4. FIG. 6 is a front view of the cover. 7] FIG. 7 is a rear view of the cover. [FIG. 8] FIG. 8 is a diagram showing the connection relation between the hook piece of the base and the legs of the lock mechanism. [FIG. 9] FIG. FIG. 10 is an enlarged front view of a partial notch showing another relationship between the spring and the restricting means. FIG. 10A shows a relaxed state of the spring, and FIG. ) Is a tension state of the spring, and FIG. 11 is a view showing another example of the tension state of the spring. [FIG. 11] FIG. Front view [FIG. 12] FIGS. 12 (a) and 12 (b) are partial views showing different relationships between the spring and the regulating means, respectively. (B) is the tension state of the spring, (c) is the extension state of the spring of FIG. 12, and (d) in FIG. FIG. 13A and FIG. 13B are front views showing examples of springs. FIG. 14A to FIG. 14F. FIG. 15 is a schematic view showing the relationship between the first restricting portion of the spring and the second restricting portion of the restricting means. FIG. 15 is an overall front view showing another example of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing an example in which an exterior cover is provided in the invention, where (A) shows a standing state, (B) and (C) show each folded state.
FIG. 17 is a diagram illustrating changes in seat load, spring effect and timing, or differences between the 1-way method and the 2-way method.
A Seat A1 Seat cushion A2 Seat back B Lock mechanism B1 Main body C Rail D Tumble mechanism 1 Base 100 Hook piece 101 Locking part 102 Swelling boss part 103 Movable body 104 Frame part 105 Guide piece 106 Groove 107 Outer cylinder part 108 Cover 109 Hole 1000 Restriction recessed part 1001 Inner cylinder part 2 Fixing member 3 Spring 300 Locking end 301 Locking end 4 1st control part 5 1st control part 6 Flat part 10 Control means 11 Base 12 Body part 13 2nd control part 14 Spring 15 Rubber spring 16 Pressing piece 20 Adjusting means 21 Screw 22 Spring 30 Cover 3000 Projection 3000a Center projection 3001 Restriction recess 3002 Swelling portion 40 Operation handle 4000 Operation rod 4001 Operation arm 41 Seat belt 50 Exterior cover

Claims (4)

A lock mechanism that controls locking and unlocking of the reclining mechanism, a base fixed to the lock mechanism, a fixed-side locking end locked to the base, and a movement component means such as a groove and a notch in the base A front-side annular spring having a movable-side engaging end provided movably on the front, a multistage first restricting portion provided on at least one surface of the spring, and a multistage engaging with the first restricting portion A seat reclining device configured by a restriction means having a second restriction portion , an operation means provided on the base for operating expansion and contraction of the spring, and a cover provided on the base;
The restricting means includes a base portion to be engaged with a restricting recess portion (moving and moving restricting guide) such as a groove, a recess portion, and a protrusion provided on the base, a main body portion provided on the base portion, and provided on the main body portion. The second restricting portion is configured to follow the spring, and applies a load to the spring so that the seat that rises and falls through the second restricting portion and the spring. A seat reclining device that regulates movement . The seat reclining device according to claim 1,
The seat reclining device , wherein a restriction recess such as a groove, a recess, and a protrusion provided in the base functions as a restriction guide for moving and moving the base . The seat reclining device according to claim 1,
The restricting means is provided in a state of being separated from the base , and the restricting recesses such as grooves, recesses, and protrusions provided in the base function as a restricting guide for moving and moving the base. A seat reclining device. The seat reclining device according to claim 1,
A recess provided in the periphery of the base, in the recess, a convex portion provided on the periphery of the cover, the seat reclining apparatus is characterized in that the engageable.

Images