JP3746256B2 - Seat reclining device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle seat reclining device (including a seat tumble mechanism).
[0002]
[Prior art]
In the conventional seat reclining device, a leaf spring is mounted on an operation shaft penetrating the lock mechanism and the casing, the leaf spring is locked to the casing and the operation shaft, and the operation shaft is operated (rotated). And the lock mechanism is locked and unlocked, and the leaf spring is tensioned and relaxed (tension release). In this configuration, the folding of the reclining sheet (referred to as a sheet) is a structure that depends exclusively on the repulsive force of the leaf spring. Therefore, the impact at the time of folding may sometimes cause an unexpected trouble. One example will be described. [1] describes a problem caused by impact. In other words, the shock may give an injury, fear to the weak such as infants, elderly people, sick people, etc., or the hard member provided on the seat may cause damage to the weak, and may be easily damaged such as glasses. It has been pointed out that it causes damage. [2] has a problem in achieving various aspects of the sheet. That is, when it is desired to fold and / or raise the seat quickly (standing at an appropriate angle of inclination), and to fold and / or stand the seat quickly and with speed changes, and ensure this operation. It has been pointed out that it is not possible to respond accurately to what to do.
[0003]
As a part of the solution, conventionally, there is a mechanism provided with a secondary means such as a torsion spring or an impact absorbing member as a means for complementing the spring. However, with this mechanism, a buffering effect can be expected to some extent, but problems such as insufficiency and a complicated structure can be considered.
[0004]
Prior art (1) to (3) are listed as part of the solution. Document (1) is a reclining device disclosed in Japanese Patent Application Laid-Open No. 1-107708. The present invention is configured to restrict the movement of the rotating side member with a viscous grease interposed therebetween, and the return rotation of the seat back by the return spring is moderated. Intended to be. Document (2) is a reclining device disclosed in Japanese Patent Application Laid-Open No. 9-252868. In the present invention, a friction spring that generates a frictional force by a return of a seat back by a return spring is disposed in a drum-shaped cover of the return spring. It is a structure and intends to reduce the return speed of the seat back when the seat back is returned to the front from the rearward tilt position. Reference (3) is a reclining device of Japanese Utility Model Publication No. Hei 6-70642. This device includes a first spiral spring that urges the seat back forward from a backward tilt position to a forward tilt position, and a seat back. A second spiral spring that urges backward between the forward tilt position and the neutral position is provided, and the second spiral spring is configured to be weaker than the urging force of the first spiral spring, thereby changing the rotational speed of the seat back. It is intended to alleviate the impact.
[0005]
[Problems to be solved by the invention]
The literature (1) is a configuration using viscous grease. Therefore, it is necessary to remodel the casing into a sealed type, which has a special structure, and there are problems that require labor, experience, etc. for its production and assembly, or problems with the durability of viscous grease. it is conceivable that. Documents (2) and (3) have a configuration in which a spring that restricts the movement of the return spring is provided. Therefore, the structure is considerably complicated, the adjustment of the repulsive force between the opposing return spring and the spring is delicate, and careful assembly and abundant experience are required to ensure a reliable movement, or When assembling the device, there are problems such as requiring experience and labor. Further, structurally, there may be a problem such as leaving a problem in the smooth movement of the seat or causing an increase in cost.
[0006]
[Means for Solving the Problems]
In the invention of claim 1, by improving the casing and the spring, the spring is regulated and the seat is folded and / or raised, moved, etc. gently, thereby eliminating various impacts, or against this impact. Based on the above-mentioned problem elimination, or by using a simple structure constituted by this improvement, the assembly is facilitated and speeded up, and the spring processing is facilitated and speeded up. Is intended. In addition, it is intended to prevent the springs from loosening (unstable tension and / or relaxation) and to ensure the reliable movement of the seat and the smooth movement as described above.
[0007]
The first aspect of the present invention includes a lock mechanism that controls locking and unlocking of the reclining mechanism, a casing that is secured to the locking mechanism, a spring that is locked at both ends of the casing, and a locking end of the spring that is provided on the casing. A seat reclining device provided with a movement groove, an operating means provided in the casing for operating the spring, and a regulating means for the spring ,
The restricting means includes a plurality of substantially uneven portion locking portions provided on any one side surface of the spring, and a plurality of uneven portions, corrugations, slits, etc. provided on any one side surface of the casing. a seat reclining apparatus characterized by being configured in.
[0008]
[0009]
[0010]
The invention of claim 2 is intended to facilitate the manufacture of the spring, to simplify the assembly with the casing, to avoid the detachment of the spring, and to achieve the object of claim 1.
[0011]
The second aspect of the present invention includes a lock mechanism that controls locking and unlocking of the reclining mechanism, a casing fixed to the locking mechanism, a spring that is locked at both ends of the casing, and a locking end of the spring provided at the casing. A seat reclining device comprising a movement groove, an operating means provided in the casing for operating the spring, and a regulating means for the spring ,
The restricting means is constituted by a slider provided with a plurality of substantially concave and convex engaging portions provided on any one side surface of the spring, and an auxiliary spring fitted in the guide groove of the casing. The seat reclining device.
[0012]
The invention of claim 3 is intended to avoid the reluctance of the spring by reliably returning the spring of claim 2 and to achieve the object of claim 1.
[0013]
A third aspect of the present invention is a seat reclining device in which the auxiliary spring according to the second aspect is guarded by a locking piece provided on the casing .
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0015]
FIG. 1 is a schematic scale diagram of an embodiment in which the present invention is applied to a seat reclining device, FIG. 2 is a schematic scale diagram of an embodiment in which the present invention is applied to a seat tumble mechanism, and (A) is a standing state, (B) and (C) show each folded state. FIG. 3 is a schematic scale diagram of the embodiment in which the examples of FIG. 1 and FIG. 2 are combined. (A) shows the standing state, (B) and (C) show the folded states. 4 to 7 show a preferred embodiment of the present invention. FIG. 4 is a front view of the casing body, FIG. 5 is a partially enlarged sectional view of the casing body, and FIG. 7 is a cross-sectional view of the casing body fitted with a casing lid, FIGS. 8 and 9 show other preferred embodiments, FIG. 8 is a front view of the casing body, and FIG. FIG. 10 and FIG. 11 show still another preferred embodiment, FIG. 10 is a front view of the casing body, and FIG. 11 is a section in which the casing lid is fitted to the casing body. FIG. 12 and FIG. 12 are illustrations of the guide groove for the slider provided in the casing lid, (A) is a front view, (B) is a sectional view in the direction of the arrow, and FIG. 13 is a connection between the casing body and the lock mechanism. Back view showing the relationship, FIG. 14 is a diagram for explaining the connection relationship between the casing body and the lock mechanism. (A) is a diagram showing an initial connection state between the hook piece of the casing body and the legs of the lock mechanism, and (b) is the casing body. FIG. 15 to FIG. 18 show another preferred embodiment of claim 1 , FIG. 15 is a front view of the casing body, and FIG. 16 is the casing. partially enlarged sectional view of the main body, FIG. 17 is an enlarged partial perspective view of the spring, Figure 18 is cross section fitting the casing lid to the casing body diagram, also 19 to 22 other according to claim 1 FIG. 19 is a front view of the casing body, FIG. 20 is a partially enlarged sectional view of the casing body, FIG. 21 is an enlarged perspective view of the main part of the spring, and FIG. 22 is a case where the casing lid is fitted to the casing body. Combined FIG. 23 is a perspective view of an enlarged main part showing another example of the spring, FIG. 24 is a diagram for explaining the relationship between the seat and the seat back, or the load, and FIG. 25 is the form of each spring and the seat back load. It is the typical figure which showed the content of this invention like the figure explaining the relationship.
[0016]
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.
[0017]
The preferred embodiment shown in FIGS. 4-7 will be described. Note that this example can also be adopted in other examples.
[0018]
Reference numeral 1 denotes a casing body 1 including an annular body 100 fixed to a body B1 constituting the lock mechanism B with a fixing member 2 interposed therebetween. The casing body 1 will be described in detail. The chamber 4 provided with the locking portion 400 for accommodating the spring 3, the arc-shaped groove 5 into which the locking end 3 a of the spring 3 provided in the outer periphery of the chamber 4 is inserted, and the groove 5 surrounding the groove 5 It is composed of several guide pieces 6 of the spring 3 and restricting means 7 (an example of the restricting means) such as irregularities, corrugations, slits, stoppers, etc. provided on the inner wall 1-1. . The casing body 1 is made of resin, but uses metal, composite material, or the like. The restricting means 7 includes a substantially uneven portion 300 (an uneven portion, a corrugated shape, a slit, a stopper, etc. provided integrally on the at least one side surface (side surface orthogonal to the longitudinal direction) of the spring 3, a retrofit, etc. The speed of the spring 3 during contraction and / or expansion (load) is controlled. Specifically, by suppressing the speed of the contraction and / or expansion, the impact of the sheet A on people, objects, etc. is mitigated. Moreover, the speed of standing up and / or folding is appropriately controlled. The form of the restricting means 7, the substantially uneven portion 300, etc., the positions to be provided, the number, and the like are not limited and are specified in consideration of the operation of the sheet A. The substantially uneven portion 300 preferably has a feature useful for facilitating the manufacture of the spring, reducing the cost, making the quality uniform, and the like by projecting and forming on the side surface side. The other locking end 3 b of the spring 3 is locked to the locking portion 400. The casing body 1 is provided with an operating handle 8 and an operating rod 80 that constitute an operating means. By operating the operating handle 8, the operating rod 80 is moved and the operating arm 81 is movable. The lock mechanism B is unlocked. The spring 3 repels through this unlock, and the locking end 3a of the spring 3 makes a stop on this right side while moving from the left side toward the right side toward the groove 5 of the casing body 1, and further repels force. Accordingly, the seat back A2 rotates ( rotates clockwise). The seat A is sequentially folded by the rotation of the seat back A2 . In this example, the repulsive force of the spring 3 is suppressed by the movement of the substantially uneven portion 300 due to the return of the spring 3 and the restriction between the substantially uneven portion 300 and the restricting means 7, and the sheet A is rapidly folded. Can be avoided. It should be noted that the adjustment of the folding speed (or prone speed) and / or the standing speed of the sheet A and the position of the sheet A to be adjusted are substantially related to the uneven portion 300 and the regulating means 7 and the repulsion of the spring 3. This can be done freely by changing the force and the positional relationship between the two. By returning the seat A, the locking end 3a of the spring 3 is shifted from the right side to the left side toward the groove 5 of the casing body 1 and is stopped to the left side, and further compressed and seat back A2 Reversely rotates ( rotates counterclockwise). By reverse rotation of the seat back A2, the seats A are sequentially raised. At the time of standing, the compression force (repulsive force) is suppressed by the restriction of the substantially uneven portion 300 of the spring 3 and the restricting means 7, and a sudden standing and / or folding of the sheet A can be avoided. Other features are as described above, and can be selected as appropriate. And the control means 7 is provided with flexibility, and when the spring 3 is contracted, it is positioned inward. It should be noted that, by sliding contact between the other substantially uneven portion 300 and the flat inner wall surface 1a-1 of the casing lid 1a, it is possible to avoid the generation of resistance or to avoid wear of the spring 3 and the inner wall surface 1a-1. Conceivable.
[0019]
The casing body 1 and the body B1 of the lock mechanism B are fixed with a fixing member 2 interposed therebetween. That is, after the leg 200 of the fixing member 2 is engaged with the hook piece 101 of the annular main body 100, the leg 200 is fixed by rotating to either one. Therefore, there is an actual advantage that the casing body 1 can be secured with one touch. Therefore, the mounting of the casing body 1 can be automated (see FIGS. 14 (A) and 14 (B)). In the figure, reference numeral 1a denotes a casing lid, and the casing lid 1a is fitted to the casing body 1. The casing lid 1a and the casing main body 1 are securely or one-touch fitted using the engaging unevenness.
[0020]
In the figure, 9 is a seat belt, and 10 is a connecting pin for securing the operating arm 81 and the operating rod 80, respectively. The casing body 1 and / or the casing lid 1a has a structure that can be used for the left and right seat reclining devices, and the components and mechanisms are, as a general rule, configured in an opposing relationship.
[0021]
Moreover, a casing is comprised by the casing main body 1 and the casing cover body 1a which were demonstrated above. The casing body 1, the casing lid 1a, etc. are merely examples, and although there is no limitation on the shape, or in order to facilitate the operation by the robot, a carrying hole, a locking piece, etc. It is also possible to provide.
[0022]
In the figure, reference numeral 70 denotes a slider for assisting the spring 3. The slider 70 is fitted in a guide groove 401 provided in the casing body 1 in the radial direction, and moves along the guide groove 401 to move the spring 3. 3 is provided for the purpose of ensuring the regulation of the substantially concave-convex portion 300 and the regulating means 7 or for preventing the spring 3 from moving away. In this example, an auxiliary spring 70a is provided on one or both sides for the purpose of facilitating the movement (retreat) of the slider 70. The slider 70 moves forward (moves in the axial direction) by the compression of the spring 3, and the slider 70 moves backward (moves in the radial direction) by expanding (opening) the spring 3. In the figure, reference numeral 70b denotes a locking piece provided on the casing body 1 that guards the auxiliary spring 70a.
[0023]
Another preferred embodiment shown in FIGS. 8 and 9 will be described. This example can be adopted in other examples.
[0024]
Hereinafter, the same parts and mechanisms are not described, and the same reference numerals are used. In this example, the restricting means 7 is provided on the inner wall surface 1a-1 of the casing lid 1a, and the restricting means 7 conforms to the above example. In this example, the restricting means 7 is configured to be locked to the substantially uneven portion 300 provided on at least the other side surface of the spring 3, and the speed (load) at the time of contraction and / or expansion of the spring 3 is set. Control. Other structures and features are the same as in the above example.
[0025]
Still another preferred embodiment shown in FIGS. 10 and 11 will be described. This example can be adopted in other examples.
[0026]
Hereinafter, the same parts and mechanisms are not described, and the same reference numerals are used. In this example, the restricting means 7 is provided on the inner wall surface 1-1 of the casing body 1 and the inner wall surface 1a-1 of the casing lid 1a. The restricting means 7 is based on the above example. In this example, the restricting means 7 is configured to be locked to the substantially uneven portion 300 provided on one side or the other side of the spring 3, and the speed (load) when the spring 3 contracts and / or expands. To control. Other structures and features are the same as in the above example. In this example, there is an advantage that speed (load) can be controlled more precisely.
[0027]
In the figure, C denotes a rail, which is a configuration used when moving the tumble mechanism D, and is useful for indoor space use, convenience, and easy access.
[0028]
15-18 is an example which made the spring 3 flat, and is an example which made the inner wall surface 1-1 of the casing main body 1 and the inner wall surface 1a-1 of the casing lid 1a flat in principle. The inner wall surface 1-1 of the casing body 1 of each example and the inner wall surface 1a-1 of the casing lid 1a can also be used. The description of the figure is as described above, but in any example, the selection is made in consideration of the weight of the seat back, the timing of effectiveness, and the like as shown in FIGS.
[0029]
FIGS. 19-22 is an example which made either one of the springs 3 into the substantially uneven | corrugated | grooved part (pure corrugated part), and the inner wall surface 1-1 of the casing main body 1 and the inner wall surface 1a-1 of the casing cover body 1a. In principle, the inner wall surface 1-1 of the casing body 1 and the inner wall surface 1a-1 of the casing lid 1a can be used. Other configurations, effects, and the like are based on the above-described example.
[0030]
The spring 3 shown in FIG. 23 has a heterogeneous structure, and is an example in which substantially uneven portions 300 are provided on any side surface and on the upper surface side. The vehicle type, the size of the vehicle, the type, the structure of the seat, or the preference Etc. are determined.
[0031]
The chart of FIG. 25 shows the form of the inner wall surface 1-1 of the casing body 1 and / or the inner wall surface 1a-1 of the casing lid 1a, the form of the spring 3, etc., the weight of the seat back, the timing of effectiveness, etc. A preferred example is shown in consideration. The use of the inner wall surface 1-1 of the casing main body 1 and the spring 3 due to the difference in shape, or the applicable vehicle type and the like are examined, and the configuration of the present invention is selected with reference to this content. The 2-way system is a system that applies restrictions to both the fall and return of the seat back, and the 1-way system is a system that applies restrictions to the return direction of the seat back. These methods are determined by, for example, the vehicle type, the size of the vehicle, the type, the structure of the seat, or the preference.
[0032]
【The invention's effect】
According to the first aspect of the present invention, there is provided a lock mechanism that controls locking and unlocking of the reclining mechanism, a casing fixed to the lock mechanism, a spring that engages both ends of the casing, and movement of a locking end of the spring provided in the casing. The seat reclining device is provided with an operating groove provided on a casing for actuating a spring , and a regulating means for the spring, and the regulating means is provided with a number of substantially provided on one side surface of the spring. It is a seat reclining device characterized by comprising an engaging portion of an uneven portion and a restricting means having a large number of uneven portions, corrugations, slits, etc. provided on any one side surface of the casing . Therefore, by improving the casing and the spring, the spring can be regulated to fold and / or stand up the seat continuously and gently without causing an impact, and various impacts can be eliminated. Or, it is possible to eliminate the harmful effects based on this impact, and to use the simple structure constituted by this improvement to facilitate and speed up the assembly, and to facilitate and quickly process the spring. There is a feature such as being able to be realized. In addition, there is an actual advantage that the reliable movement of the seat and the smooth movement as described above can be ensured by avoiding the loosening of the spring (unstable tension and / or relaxation).
[0033]
[0034]
The invention according to claim 2 is a lock mechanism for controlling locking and unlocking of the reclining mechanism, a casing fixed to the locking mechanism, a spring locked at both ends of the casing, and a locking end movement of the spring provided in the casing A seat reclining device provided with an operating groove provided in a casing for operating a spring, and a regulating means for the spring, wherein the regulating means is provided on a plurality of side surfaces of the spring. A seat reclining device comprising a slider provided with an engaging portion of a substantially uneven portion and an auxiliary spring fitted in a guide groove of a casing. Therefore, there is a feature that the spring can be avoided and the object of claim 1 can be achieved.
[0035]
A third aspect of the invention is a seat reclining device configured to guard the auxiliary spring according to the second aspect with a locking piece provided on the casing . Therefore, by reliably returning the spring according to claim 2 , it is possible to avoid the reluctance of the spring and to achieve 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.
4 is a front view of a casing body showing a preferred embodiment according to claim 1. FIG. 5 is a sectional view of FIG. 4. FIG. 6 is a partially enlarged sectional view of the casing body of FIG. FIG. 8 is a front perspective view of a casing body showing another preferred embodiment of the present invention shown in FIGS. 4 to 7. FIG. 9 is a sectional view of FIG. FIG. 11 is a front view of a casing body showing another preferred embodiment of the present invention shown in FIGS. 4 to 7. FIG. 11 is a sectional view of FIG. 10. FIG. (B) is a cross-sectional view. FIG. 13 is a back view showing the connection between the casing body and the locking mechanism. FIG. 14 (a) is the connection between the hook piece of the casing body and the legs of the locking mechanism. The figure which showed the initial state, and (b) is the hook piece and the lock machine of the casing body Casing sectional view [17] Figure 15 a front view of the casing main body [16] Figure 15 shows another preferred embodiment according to FIGS. 15A and 15B claims 1 showing the interlocking state between the legs of Fig. 18 is a partially enlarged sectional view of the main body. Fig. 18 is a perspective view of an enlarged main portion of the spring of Fig. 15. Fig. 19 is a front view of a casing main body showing another preferred embodiment according to claim 1 . FIG. 21 is a partially enlarged sectional view of the casing body of FIG. 19. FIG. 22 is an enlarged perspective view of the main part of the spring of FIG. 19. FIG. 23 is an enlarged perspective view of the main part of another example of the spring. FIG. 24 is a diagram for explaining the relationship between a seat and a seat back or a load, etc. FIG. 25 is a diagram for explaining the relationship between the form of each spring and the seat back load.
A seat A1 seat cushion A2 seat back B lock mechanism B1 main body C rail D tumble mechanism 1 casing main body 1-1 inner wall surface 1a casing lid 1a-1 inner wall surface 100 annular main body 101 hook piece 2 fixing member 200 leg 3 spring 3a toe 3b locking end 300 substantially uneven portion 4 rooms 400 locking portion 401 the guide grooves 5 groove 6 the guide piece 7 regulating means 7a engaging irregularities 70 sliders 70a auxiliary scan pulling 70b engaging piece 8 operating handle 80 the operating rod 81 actuating arm 9 Seat belt 10 Connecting pin

Claims (3)

A locking mechanism for controlling locking and unlocking of the reclining mechanism, a casing fixed to the locking mechanism, a spring locked at both ends of the casing, and a groove for moving the locking end of the spring provided in the casing; A seat reclining device provided with an operating means provided in the casing for operating the spring and a regulating means for the spring ,
The restricting means includes a plurality of substantially uneven portion locking portions provided on any one side surface of the spring, and a plurality of uneven portions, corrugations, slits, etc. provided on any one side surface of the casing. in the seat reclining apparatus characterized by being configured. A locking mechanism for controlling locking and unlocking of the reclining mechanism, a casing fixed to the locking mechanism, a spring locked at both ends of the casing, and a groove for moving the locking end of the spring provided in the casing; A seat reclining device provided with an operating means provided in the casing for operating the spring and a regulating means for the spring,
The restricting means is constituted by a slider provided with a plurality of substantially concave and convex engaging portions provided on any one side surface of the spring, and an auxiliary spring fitted in the guide groove of the casing. seat reclining device that. A seat reclining device configured to guard the auxiliary spring according to claim 2 with a locking piece provided on the casing .

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