JP3746249B2 - 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. In addition, as a part of the solution, prior documents are listed. This document (1) is a reclining device disclosed in Japanese Patent Application Laid-Open No. 1-107708. The present invention intends to slow the return rotation of the seat back by the return spring by restricting the movement of the rotation side member through the viscous grease. Document (2) is a reclining device disclosed in Japanese Patent Laid-Open No. 9-252868. This invention is a configuration in which a friction spring in which a friction force is generated by a return by the return spring of the seat back is disposed in the drum-like cover of the return spring. It is intended to reduce the seatback return speed. Reference (3) is a reclining device disclosed in Japanese Utility Model Laid-Open No. 6-70642. The present invention includes a first spiral spring that biases the seat back forward from a backward tilt position to a forward tilt position, and a second spiral that biases the seat back backward from a forward tilt position to a neutral position. By providing a spring and configuring the second spiral spring to be weaker than the biasing force of the first spiral spring, it is intended to reduce the impact by changing the rotational speed of the seat back.
[0004]
[Problems to be solved by the invention]
In the invention of the above-described document (1), a viscous grease is used. 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. In the inventions and devices of Documents (2) and (3), a spring for restricting 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.
[0005]
[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.
[0006]
The first 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 engages both ends of the casing, and a locking end of the spring provided in 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 comprises a plurality of substantially uneven portions provided on the spring, a flexible slider provided on the casing, and a plurality of engagement portions provided on the slider. The seat reclining device .
[0007]
[0008]
[0009]
[0010]
[0011]
A second aspect of the present invention, by reliably return spring according to claim 1, that achieve acting blindly avoidance of the spring, also intended to achieve the object of the claim 1.
[0012]
A second aspect of the present invention is a seat reclining device configured to restrict the slider according to the first aspect with an auxiliary spring.
[0013]
The invention of claim 3 is intended to facilitate handling of the locking piece portion that regulates the spring or to improve versatility, and to achieve the object of claim 1.
[0014]
Claim 3 is a seat reclining device the slider according to detachably configured to claim 1.
[0015]
The invention of claim 4 intends to ensure the function of the spring and achieve the object of claim 1.
[0016]
Claim 4, the engagement portion of the plurality of substantially uneven portion provided on the spring according to claim 1, a seat reclining device configured to a portion of the spring.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0018]
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 6 show an embodiment according to claim 1. FIG. 4 is a front view of the casing body, FIG. 5 is a rear view of the casing body, and FIG. 6 is a case where the casing lid is fitted to the casing body. the combined cross-sectional view, also FIGS. 7 to 9 shows an embodiment according to claim 2, 7 is a front view of the casing main body, FIG. 5 is a rear view of the casing body, FIG. 8 is a casing in the casing main body cross section fitted lid view, further 10 to 12 shows an embodiment according to claim 3, Figure 10 is a front view of the casing main body, FIG. 11 is a rear view of the casing body, FIG. 12 FIG. 13 to FIG. 15 show another example of the embodiment described in claim 4 , FIG. 13 is a front view of the casing body, and FIG. 14 is the casing. Back view of the body, Fig. 15 shows the casing body Shows a cross-sectional view fitted pacing lid. In addition, the structure of Claim 1 and 4 is the concept of this invention, and is shown by each figure.
[0019]
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.
[0020]
An embodiment according to claim 1 shown in FIGS. 4 to 6 will be described.
[0021]
Reference numeral 1 denotes a casing main body 1 having an annular rod 100 fixed to a main body B1 constituting the lock mechanism B with a fixing member 2 interposed therebetween. The casing main 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 flexible (one example) regulating means 7 (regulating means: elastic locking piece portion) extending from the guide pieces 6. The casing body 1 is made of resin, but uses metal, composite material, or the like. The restricting means 7 is configured to be locked to a substantially uneven portion 300 (regulating means: substantially exhibiting a tooth shape) provided at a substantially central portion of the spring 3, and the speed at the time of contraction and / or expansion of the spring 3 is set. Control. 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. In addition, the place which provides the substantially uneven | corrugated | grooved part 300 is not limited, It considers the operation | movement of the sheet | seat A, and specifies it. And this rough uneven | corrugated | grooved part 300 desirably has the structure which provides the flat parts 301 and 301 in both ends, and does not inhibit the function of the spring 3. FIG. 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 as indicated by the arrow in FIG. 11) . 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 as indicated by the arrow in FIG. 11) . 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. In the figure, reference numeral 1 a denotes a casing lid, which is fitted to the casing body 1. Note that the casing lid 1a and the casing body 1 are securely or one-touch fitted using the engaging irregularities. 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 each component and mechanism are, as a general rule, configured in an opposing relationship. 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]
An embodiment according to claim 2 shown in FIGS. 7 to 9 will be described.
[0023]
Hereinafter, the same parts and mechanisms are not described, and the same reference numerals are used. The relationship between the restricting means 7 and the substantially uneven portion 300 of the spring 3 conforms to the above example. In this example, 70 is a slider provided on one side of the spring 3, and the slider 70 is fitted in a guide groove 401 provided in the casing body 1 in the radial direction, and along this guide groove 401. It is a structure which moves and ensures regulation of the substantially uneven portion 300 of the spring 3 and the regulating means 7. 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.
[0024]
Another example of the embodiment described in claim 3 shown in FIGS.
[0025]
In this example, the restricting means 7 (the restricting means: the hard locking piece portion) is configured to be movable via the pivot pin 71 and is securely locked to the substantially uneven portion 300. This is a mechanism that reliably returns using the auxiliary spring 71a. In addition, it is desirable to form the locking unevenness 7a in the restricting means 7 to ensure the locking relationship with the substantially uneven portion 300. The pivot pin 71 is supported by the locking piece 402 of the casing body 1. In the figure, 71b represents a weight. In this example, the restricting means 7 is locked to the locking unevenness 7 a via the repulsive force of the auxiliary spring 71 a and the pivot pin 71. In the figure, 71c is a projection for locking and / or preventing removal of the auxiliary spring 71a, and 403 is a cylinder portion for locking and / or preventing removal of the auxiliary spring 71a.
[0026]
An embodiment according to claim 4 shown in FIGS. 13 to 15 will be described.
[0027]
In this example, the restricting means 7 (the restricting means: elastic / hard locking piece portion) is detachably provided on the fixing portion 72 provided on the casing body 1, and the auxiliary spring 71a, the cylinder portion 403, etc. Similar to FIGS. In this example, the mounting surface 71d of the restricting means 7 serves as a guide for restricting the spring 3 (the same applies to other examples). Other configurations and mechanisms are the same as those described above. Further, in this example, the replacement of the restricting means 7 is useful for dealing with breakage, adjusting shock relaxation (strength of elasticity, etc.), compatibility with the spring 3, etc. (the same applies to other examples).
[0028]
In the figure, C indicates a rail, which is used when moving the tumble mechanism D, and is useful for indoor space use, convenience, and easy access.
[0029]
16 and 17 show the process of reaching the folded state X3 from the prone state X1 of the sheet A through the intermediate state X2 (arbitrary position or desired position, etc.), the angle θ in this process, and the repulsion of the spring 3. FIG. 16 is a schematic diagram for explaining an example of the relationship with the force F, FIG. 16 shows a moving state of the seat A, and FIG. 17 shows a state in which the spring 3 acts as a chart. The moving state of the seat A or the state in which the spring 3 acts is a preferable example and does not restrict the present invention. As in this example, the process from X1 to X2 starts with the very gentle repulsive force (regulation method) of the spring 3, and the process of smoothly and quickly folding from the X2 using the repulsive force of the spring 3 It is considered ideal but not limited.
[0030]
【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. and grooves use, and operating means provided in the casing for actuating the spring, a seat reclining apparatus provided with the regulating means of the spring, the regulating means, the locking portion of the plurality of substantially uneven portion provided on the spring And a flexible slider provided on the casing, and a number of engaging irregularities provided on the slider . Therefore, by improving the casing and the spring, the spring can be regulated so that the folding and / or standing of the seat can be performed gently, various impacts can be eliminated, or the above-described adverse effects based on this impact can be eliminated. In addition, using a simple structure constituted by this improvement, the assembly can be facilitated and speeded up, and the spring can be easily processed and speeded up. 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).
[0031]
[0032]
[0033]
The invention according to claim 2 is a seat reclining device configured to regulate the slider according to claim 1 with an auxiliary spring. Therefore, by reliably returning the spring according to claim 3, it is possible to avoid the reluctance of the spring and to achieve the object of claim 1.
[0034]
The invention of claim 3 is a seat reclining device the slider according to detachably configured to claim 1. Accordingly, there is a feature that the handling of the locking piece portion for regulating the spring can be facilitated or the versatility can be improved, and the object of the first aspect can be achieved.
[0035]
A fourth aspect of the present invention, the engagement portion of the plurality of substantially uneven portion provided on the spring according to claim 1, a seat reclining device configured to a portion of the spring. Therefore, there is a feature that the function of the spring can be ensured and the object of claim 1 can be achieved.
[0036]
[Brief description of the drawings]
FIG. 1 is a schematic scale diagram of an embodiment in which the present invention is applied to a seat reclining device of the seat. FIG. 2 is a schematic scale diagram of an embodiment in which the present invention is applied to a seat tumble mechanism. , (B), (c) indicate 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 the casing main body showing the embodiment of claim 1. FIG. 5 is a rear view of FIG. 4. FIG. 6 is a cross-sectional view of the casing main body of FIG. 7] rear view and FIG. 9 is a cross-sectional view fitted casing lid to the casing body 7 in the front view [Figure 8] Figure 7 of the casing body showing an embodiment of claim 2 [10] front view [11] rear view of FIG. 10 and FIG. 12 is a cross-sectional view fitted casing lid to the casing main body of FIG. 10 and FIG. 13 claims of the casing body showing an embodiment of claim 3 FIG. 14 is a front view of a casing main body showing another example of the embodiment described in FIG. 4. FIG. 15 is a rear view of FIG. 13. FIG. 16 is a sectional view of the casing main body shown in FIG. The process from the prone state of the sheet to the folded state through the intermediate state is shown. And angle of the seat of the formulas drawings [17] Figure 16 a schematic view illustrating an example of a relationship between repulsive force of the spring [Description of symbols]
A Seat A1 Seat cushion A2 Seat back B Lock mechanism B1 Main body C Rail D Tumble mechanism 1 Casing main body 1a Casing lid body 100 Annular rod 2 Fixing member 3 Spring 3a Locking end 3b Locking end 300 Substantially uneven part 301 Flat part 4 Room 400 Locking portion 401 Guide groove 402 Locking piece 403 Tube portion 5 Groove 6 Guide piece 7 Restricting means 7a Locking unevenness 70 Slider 70a Auxiliary spring 70b Locking piece 70 Slider 71 Pivoting pin 71a Auxiliary spring 71b Weight 71c Projection 71d Surface 8 Operation handle 80 Operation rod 81 Operation arm 9 Seat belt 10 Connecting pin

Claims (4)

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 The seat reclining device is characterized in that an operating means provided in the casing for operating the spring and a regulating means for the spring are provided ,
The restricting means comprises a plurality of substantially uneven portions provided on the spring, a flexible slider provided on the casing, and a plurality of engagement portions provided on the slider. A seat reclining device. A seat reclining device configured to regulate the slider according to claim 1 with an auxiliary spring . A seat reclining device in which the slider according to claim 1 is configured to be detachable . A seat reclining device in which a plurality of substantially concave and convex engaging portions provided on the spring according to claim 1 are formed as a part of the spring .

Images