Small continuous reclining chair

Abstract

In a small continuous recliner, the neck ring (2.1) has a center point (O). The tooth surfaces of the external gear teeth of the gear rack (2) and the internal gear ring of the ring gear rack (3) have a contact point (D). The center point (O) and the contact point (D) are connected to form a first connection line (OD). Each tooth of the external gear teeth of the gear rack (2) has a first working arc segment (a~b). The first working arc segment (a~b) of the contact teeth of the gear rack (2) has a first arc segment center (01). Each tooth of the internal gear ring of the ring gear rack (3) has a second working arc segment (c~d). The second working arc segment (c~d) of the contact teeth of the ring gear rack (3) has a second arc segment center (02). The first arc segment center (01) and the second arc segment center (02) are connected to form a second connection line (0102). The contact point (D) is located on the second connection line (0102). The angle formed by the first connection line (OD) and the second connection line (0102) is between 85° and 95°. When actually used, the radial component force on the tooth surface is made as small as possible, and undesirable phenomena such as tooth slippage and reverse drive are less likely to occur. Thereby, the compression strength, bending strength, and fatigue strength of the tooth part are improved by the tooth profile design, the strength of the recliner is improved, while maintaining the strength, the diameter of the recliner is reduced, the weight is lightened, and thereby weight reduction is achieved.

Description

Technical Field

[0001] The present invention relates to automobile seats, and more specifically to a small continuous recliner. Background Art

[0002] With the development of new energy vehicles and the enhanced implementation of carbon neutrality policies, weight reduction at the component level is urgently required. For recliners (angle adjusters), making the product as small and lightweight as possible while maintaining strength has become a market demand for such products. It is required to reduce the size of automobile seat recliners while maintaining and further improving their strength. How to achieve size and weight reduction while ensuring strength through structural innovation has become a critical issue for manufacturers of automobile seat recliners. Summary of the Invention Problem to be Solved by the Invention

[0003] The present invention provides a small continuous recliner that can achieve size and weight reduction of the recliner while ensuring strength. Means for Solving the Problem

[0004] The small continuous recliner according to the present invention comprises: a gear tooth plate and a ring gear tooth plate capable of rotating relative to each other, wherein the gear tooth plate has an external gear, the ring gear tooth plate has an internal tooth ring, the gear tooth plate and the ring gear tooth plate are connected to each other via the external gear and the internal tooth ring that mesh with each other, and the gear tooth plate has a neck ring concentric with the external gear; an eccentric member driven by a drive cam, which rotates in the circumferential direction to drive the gear tooth plate and the ring gear tooth plate to perform relative rolling motion; the neck ring has a center point, tooth flanks of the external gear of the gear tooth plate and the internal tooth ring of the ring gear tooth plate have a contact point, and the center point and the contact point are connected to form a first connection line, Each tooth of the external gear on the gear plate has a first working arc segment, and the first working arc segment of the contact teeth on the gear plate has a first arc segment center, each tooth of the internal ring on the ring gear plate has a second working arc segment, and the second working arc segment of the contact teeth on the ring gear plate has a second arc segment center, and the first arc segment center and the second arc segment center are connected to form a second connecting line, The contact point is located on the second connecting line, and the angle between the first and second connecting lines is between 85° and 95°.

[0005] Preferably, the first working arc segment of the contact teeth of the gear tooth plate has a first arc radius, and the second working arc segment of the contact teeth of the ring gear tooth plate has a second arc radius, with the ratio of the first arc radius to the second arc radius being between 1.05 and 1.15.

[0006] Preferably, each tooth of the external gear in the gear plate has a first tooth profile width, and each tooth of the internal ring in the ring gear plate has a second tooth profile width, with the tooth width ratio of the first tooth profile width to the second tooth profile width being between 1.1 and 1.6.

[0007] Preferably, the drive cam includes a cylindrical segment that is axially inserted into and extends within the neck ring.

[0008] Preferably, the gap between the cylindrical segment and the neck ring is between 0.05 mm and 0.15 mm.

[0009] Preferably, the drive cam is a integrally molded member.

[0010] Preferably, the eccentric member is restricted by the fitting of a wedge and a spring such that the external gear teeth of the gear tooth plate are pressed into the internal tooth ring of the ring gear tooth plate at the meshing position.

[0011] Preferably, the gear tooth plate has a first stepped surface for supporting the wedge, and the ring gear tooth plate has a burred boss, the first stepped surface is provided close to the top surface of the burred boss.

[0012] Preferably, the gear tooth plate includes a boss for connecting a small continuous recliner to an external connecting plate, a third stepped surface for supporting the external connecting plate, and a second stepped surface that is press-formed together with the third stepped surface, wherein the first and second stepped surfaces are on the same plane.

[0013] Preferably, the distance between the second stepped surface and the third stepped surface is equal to the material thickness of the gear tooth plate.

[0014] Preferably, the small continuous recliner further includes a hoop that integrally holds the gear teeth plate and the ring gear teeth plate.

[0015] Preferably, the third stepped surface has a protruding height so that the external connecting plate can be positioned on the third stepped surface while avoiding the hoop.

[0016] Preferably, the wedge is supported by the neck ring with its curved inner surface and by the ring gear teeth plate with its curved outer surface.

[0017] Preferably, the drive cam has a drive segment, the wedge is composed of two wedge sections, the drive segment is inserted into the gap between the narrow sides of the two wedge sections, and both ends of a spring are connected to the opposing wider sides of the two wedge sections, respectively, so that the spring acts circumferentially on the wedge sections to forcibly separate them.

[0018] Preferably, the small continuous recliner further includes a friction bearing provided between the curved outer surface of the wedge and the central hole of the ring gear tooth plate.

[0019] Preferably, the small continuous reclining mechanism further includes a cover that covers the drive cam and is fixedly connected to the ring gear teeth plate. [Effects of the Invention]

[0020] In the small continuous recliner according to the present invention, the contact point is provided on the second connection line, and the angle formed between the first connection line and the second connection line is between 85° and 95°, whereby the radial component force on the tooth surface is minimized, making undesirable phenomena such as tooth slippage and reverse driving less likely to occur. Accordingly, through the tooth profile design, the compressive strength, bending strength and fatigue strength of the tooth portion are improved, the strength of the recliner is enhanced, and while maintaining the strength, the diameter of the recliner is reduced and the weight is reduced, thereby achieving weight reduction. As described above, the small continuous recliner according to the present invention is structurally innovative, which further simplifies the manufacture and processing of components, achieves weight reduction and size reduction while ensuring a high strength level, and meets market demands. [BRIEF DESCRIPTION OF THE DRAWINGS]

[0021] [Figure 1] It is an exploded view of a small continuous recliner according to one preferred embodiment of the present invention.

[0022] [Figure 2] It is a cross-sectional view of a small continuous recliner according to one preferred embodiment of the present invention.

[0023] [Figure 3] It shows the meshing tooth profiles of the gear tooth plate and the ring gear tooth plate of the small continuous recliner in Figures 1 and 2.

[0024] [Figure 4] It is an enlarged view of the part in Figure 3.

[0025] [Figure 5] It further shows the meshing tooth profiles of the gear tooth plate and the ring gear tooth plate of the small continuous recliner in Figures 1 and 2.

[0026] [Figure 6] It shows the supporting action of the cylindrical segment of the driving cam of the small continuous recliner in Figures 1 and 2.

[0027] [Figure 7]Figures 1 and 2 show the bias arm of a small, continuous-type recliner.

[0028] [Figure 8] This is an illustration of the gear teeth plate of a reclining chair in the prior art.

[0029] [Figure 9] Figures 1 and 2 show the stepped surface that is flush with the gear teeth plate of the small continuous reclining chair. [Modes for carrying out the invention]

[0030] Hereinafter, preferred embodiments of the present invention will be shown with reference to the drawings, and these embodiments will be described in detail.

[0031] As shown in Figures 1 and 2, a small continuous reclining chair of one preferred embodiment according to the present invention includes a hoop 1, a gear tooth plate 2, and a ring gear tooth plate 3, wherein the gear tooth plate 2 and the ring gear tooth plate 3 are rotatably mounted relative to each other, and the hoop 1 integrally holds the gear tooth plate 2 and the ring gear tooth plate 3. In this embodiment, the hoop 1 for absorbing axial forces is fixedly connected to the ring gear tooth plate 3. It should be understood that the hoop 1 does not interfere with the relative rotation of the gear tooth plate 2 and the ring gear tooth plate 3.

[0032] Regarding the installation of the small continuous reclining chair, the gear tooth plate 2 is attached to the seat, and the ring gear tooth plate 3 is attached to the backrest, thereby adjusting the inclination angle of the backrest relative to the seat. Of course, the mounting positions of the gear tooth plate 2 and the ring gear tooth plate 3 may be swapped; that is, the gear tooth plate 2 may be attached to the backrest, and the ring gear tooth plate 3 may be attached to the seat.

[0033] The gear plate 2 and the ring gear plate 3 are connected to each other by gears to facilitate adjustment and fixing. To enable this gear connection, an external gear is formed on the gear plate 2 and an internal ring is formed on the ring gear plate 3, and the external gear and the internal ring mesh with each other. The diameter of the tip circle of the external teeth of the external gear is at least one tooth height smaller than the diameter of the base circle of the internal teeth of the internal ring. There is at least one difference in the number of teeth between the external gear and the internal ring, and this difference allows the internal ring to move on the external gear.

[0034] The gear tooth plate 2 has a neck ring 2.1 that is concentric with respect to the external gear. The miniature continuous reclining chair according to this embodiment further includes a wedge 5 that is supported by the neck ring 2.1 with its curved inner surface and supports the ring gear tooth plate 3 with its curved outer surface. In this case, the miniature continuous reclining chair according to this embodiment further includes a friction bearing 4 provided between the curved outer surface of the wedge 5 and the central hole 3.1 of the ring gear tooth plate 3. The miniature continuous reclining chair according to this embodiment further includes a drive cam 6, the drive cam 6 having a cylindrical segment 6.1 that extends in the axial direction inserted into the neck ring 2.1, and a boring hole is provided in the center for matching and housing the drive shaft, thereby enabling braking of the drive cam 6 by the drive shaft. In this embodiment, the drive cam 6 is a metal member. The drive cam 6 also has a drive segment 6.2. The wedge 5 is composed of two wedge sections, and the drive segment 6.2 of the drive cam 6 is inserted into the gap between the narrow sides of the two wedge sections. The miniature continuous recliner according to this embodiment further includes a spring 7, the ends of which are connected to the opposing wider sides of the two wedge sections, so that the spring 7 acts circumferentially on the wedge sections, forcibly separating them. In this way, the eccentric member is limited by the fitting of the wedge 5 and the spring 7, so that the external gear teeth of the gear tooth plate 2 are pressed into the internal ring teeth of the ring gear tooth plate 3 in the meshing position. Furthermore, the miniature continuous recliner according to this embodiment further includes a cover 8 that covers the drive cam 6 and is fixedly connected to the ring gear tooth plate 3.

[0035] The process for assembling the compact continuous recliner according to this embodiment is as follows: When the friction bearing 4 is press-fitted into the central hole 3.1 of the ring gear tooth plate 3, the external gear of the gear tooth plate 2 and the internal ring of the ring gear tooth plate 3 mesh, the cylindrical segment 6.1 of the drive cam 6 is fitted into the neck ring 2.1 of the gear tooth plate 2, and both ends of the spring 7 are inserted into the wider holes of the two wedge sections of the wedge 5, so that the wedge 5 is positioned in close contact with the space formed by the friction bearing 4 and the neck ring 2.1. The hoop 1 and the ring gear tooth plate 3 are connected by welding, and the cover 8 and the ring gear tooth plate 3 are connected by welding.

[0036] The operating mechanism of the compact continuous reclining chair according to this embodiment specifically includes the following: During driving by the rotary drive shaft, first, all torque is transmitted to the drive cam 6, and then to the eccentric member (formed by a wedge 5 and a spring 7) by the drive segment 6.2. The eccentric member slides along the friction bearing 4, deflecting the eccentric direction, thereby shifting the position of the ring gear tooth plate 3 of the external gear tooth plate 2 at the internal tooth ring. In this way, continuous and variable adjustment of the inclination of the backrest becomes possible.

[0037] In particular, in the small continuous reclining chair of the present invention, the tooth profiles of the gear tooth plate 2 and the ring gear tooth plate 3 are designed to improve the compressive strength, bending strength, and fatigue strength of the teeth, and also increase the strength of the gear tooth plate 2 and the ring gear tooth plate 3 of the same diameter. By designing the tooth profiles of the gear tooth plate 2 and the ring gear tooth plate 3 while maintaining strength, the diameter of the gear tooth plate 2, the ring gear tooth plate 3, and their hoop 1 can be reduced, thereby reducing weight and thus achieving a lighter design.

[0038] As shown in Figure 3, the tooth profile width of the gear plate 2 is A, and the tooth profile width of the ring gear plate 3 is B. In this invention, the tooth width ratio A / B is between 1.1 and 1.6. In this way, strength is ensured during fatigue work while ensuring dynamic strength.

[0039] As shown in Figure 4, each tooth of the external gear of the gear plate 2 has working arc segments a to b, and each tooth of the internal ring of the ring gear plate 3 has working arc segments c to d, and both of these are fitted together.

[0040] As shown in Figure 5, taking contact teeth as an example, the working arc segments a to b (see Figure 4) of the contact teeth on the gear tooth plate 2 have an arc segment center O1 and an arc radius R1, and the working arc segments c to d (see Figure 4) of the contact teeth on the ring gear tooth plate 3 have an arc segment center O2 and an arc radius R2. O is the center of the neck ring 2.1 of the gear tooth plate 2, and the contact point D between the gear tooth plate 2 and the tooth surface of the ring gear tooth plate 3 lies on the connection line between the arc segment center O1 and the arc segment center O2, and the angle between the OD connection line and the O1D connection line (i.e., the O1O2 connection line) is between 85° and 95°. In this way, the radial force component on the tooth surface can be made as small as possible, making it less likely for undesirable phenomena such as tooth slippage and reverse drive to occur. Furthermore, the ratio of the arc radius R1 to the arc radius R2, R1 / R2, is between 1.05 and 1.15 (slightly greater than 1). This design increases the contact surface when force is applied between the two teeth, improving the compressive strength of the tooth surface, which has a favorable effect on both fatigue strength and dynamic strength.

[0041] In particular, the drive cam 6 of the miniature continuous reclining chair of the present invention improves the strength of the reclining chair by inserting the cylindrical segment 6.1 into the neck ring 2.1. While maintaining strength, the diameters of the gear teeth plate 2, the ring gear teeth plate 3, and their hoops 1 can be reduced, thereby reducing their weight and thus achieving a lighter design. Furthermore, the drive cam 6 of the miniature continuous reclining chair of the present invention is a single, integrally molded part; that is, the cylindrical segment 6.1 and the drive segment 6.2 are integrally molded into the main body. Compared with a separate drive system consisting of multiple parts (e.g., three parts), both the manufacturing process and the assembly process of the drive cam 6 of the present invention are simplified.

[0042] Regarding the transmission of force applied to the small continuous reclining chair of the present invention, as shown in Figure 6, the external force F1 acts on the neck ring 2.1 of the gear tooth plate 2 via the ring gear tooth plate 3, friction bearing 4, and wedge 5. At this time, the neck ring 2.1 generates a resistive force through its own deformation. If the deformation of the neck ring 2.1 is too large, slippage of the reclining chair teeth may occur, i.e., strength may be lost. Therefore, the strength of the neck ring 2.1 directly affects the strength of the reclining chair. Due to limitations imposed by manufacturing processes such as fine blanking, the thickness and strength of the neck ring 2.1 cannot be increased indefinitely, and therefore, in many cases, this is the point that limits the improvement of the strength of the reclining chair. In the present invention, the cylindrical segment 6.1 of the drive cam 6 inserted into the neck ring 2.1 effectively resists the deformation of the neck ring 2.1 and improves its strength. Under low-intensity working conditions, the deformation of the neck ring 2.1 is extremely small, and it should be understood that the material of the drive cam 6 may be, for example, plastic.

[0043] A gap is necessary for the fitting between the cylindrical segment 6.1 of the drive cam 6 and the neck ring 2.1 of the gear tooth plate 2. Since the drive cam 6 rotates inside the neck ring 2.1 to drive the recliner, if there is no gap or the gap is too small, it becomes difficult to assemble and the operating torque increases. From a strength perspective, even if minute deformation occurs in the neck ring 2.1, the cylindrical segment 6.1 can resist the deformation of the neck ring 2.1, so it is preferable that the gap between the cylindrical segment 6.1 and the neck ring 2.1 is small. In the present invention, the effect of achieving both is obtained by tolerance analysis and analysis using finite element strength calculation software. Specifically, in this invention, the gap between the cylindrical segment 6.1 and the neck ring 2.1 is set between 0.05 mm and 0.15 mm, thereby ensuring smooth mounting and operation of the drive cam 6, while making the drive cam 6 as close as possible to the inner surface of the neck ring 2.1. When the neck ring 2.1 is subjected to force and deforms slightly, it comes into contact with the cylindrical segment 6.1 of the drive cam 6. At this time, the cylindrical segment 6.1 begins to provide a reaction force F2 to help the neck ring 2.1 resist its own deformation, thereby improving the strength of the recliner, that is, providing timely and strong support to the neck ring 2.1 when it is strong, and ensuring the strength of the recliner.

[0044] In particular, in the small continuous reclining chair of the present invention, the provision of a flush stepped surface reduces the bias force in the force-receiving path of the reclining chair, improving strength and also facilitating the manufacture of parts.

[0045] As shown in Figure 7, the force transmission path inside the recliner is as follows: The external force F0 is transmitted to the wedge 5 via the friction bearing 4 by the action of the ring gear teeth plate 3, and finally, the wedge 5 applies a force F1 to the neck ring 2.1. The line showing the action of the external force F0 is represented by the force-receiving center plane P1 of the teeth, and the line showing the action of the force F1 is represented by the force-receiving center plane P2 of the neck ring. If these two planes P1 and P2 are not at the same height, a bias arm L is generated, and a bias moment is also generated. The larger the bias moment, the more unfavorable it is to the strength of the recliner, so the bias arm L should be kept as small as possible.

[0046] As shown in Figure 8, in a conventional recliner, the gear tooth plate has a first stepped surface 2.2', a second stepped surface 2.3', a boss 2.4', and a third stepped surface 2.5'. Of these, the boss 2.4' is used for welding the recliner to the external connecting plate, and the third stepped surface 2.5' supports the external connecting plate. The third stepped surface 2.5' has a protrusion height d so that the external connecting plate can be positioned on the third stepped surface 2.5' while avoiding the hoop. Due to the characteristics of the fine blanking process, the second stepped surface 2.3' is a press surface formed simultaneously with the forming of the third stepped surface 2.5', and the distance between the second stepped surface 2.3' and the third stepped surface 2.5' is the material thickness of the tooth plate, that is, the position of the second stepped surface 2.3' depends on the protrusion height d. Furthermore, the ring gear tooth plate has a burred boss, and the burred boss is limited by the thickness and strength of the material. Because the burred height is small, it is necessary to raise the first stepped surface 2.2' for positioning the wedge to bring it closer to the top surface of the burred boss. Therefore, a height difference t exists between the first stepped surface 2.2' and the second stepped surface 2.3', and as a result, it is known that the bias arm L (see Figure 7) becomes large. Moreover, because the first stepped surface 2.2' and the second stepped surface 2.3' are not on the same plane, the press forming process requires repeating the press multiple times to manufacture the first stepped surface 2.2' and the second stepped surface 2.3' separately, which complicates the process.

[0047] As shown in Figure 9, the gear tooth plate 2 of the present invention also has a first stepped surface 2.2 and a second stepped surface 2.3. Of these, the first stepped surface 2.2 is a plane that supports the wedge 5, and in order to stably maintain the position of the wedge 5 when subjected to force, it is necessary to make it as close as possible to the top surface P3 of the burring boss 3.1 of the ring gear tooth plate 3. In the present invention, by increasing the material thickness of the ring gear tooth plate 3, the height h of the burring boss 3.1 is increased, eliminating the need to raise the first stepped surface 2.2 to match the height h of the burring boss 3.1, and also maintaining a constant position for the second stepped surface 2.3. For this reason, the first stepped surface 2.2 and the second stepped surface 2.3 may be configured to be on the same plane, and by eliminating the height difference, the bias arm L (see Figure 7) can be reduced, achieving the objective of optimizing strength. Furthermore, from a manufacturing process perspective, the first stepped surface 2.2 and the second stepped surface 2.3 can be formed with a single press step, simplifying the manufacturing process.

[0048] The above are merely preferred embodiments of the present invention and do not limit the scope of the invention. Various further modifications are possible to the above embodiments of the present invention. That is, any simple and equivalent modifications and alterations made based on the claims and specification of the present invention application are all included within the scope of protection of the claims of the present invention patent. Anything not described in detail in the present invention is prior art.

Claims

1. It is a small, continuous-type recliner, A gear tooth plate (2) and a ring gear tooth plate (3) that are rotatable relative to each other, wherein the gear tooth plate (2) has an external gear, and the ring gear tooth plate (3) has an internal ring, and the gear tooth plate (2) and the ring gear tooth plate (3) are connected to each other via the external gear and the internal ring that mesh with each other, and the gear tooth plate (2) has a neck ring (2.1) that is concentric with respect to the external gear, It includes eccentric members (5, 7) that are driven by a drive cam (6) and rotate in the circumferential direction to drive the gear teeth plate (2) and the ring gear teeth plate (3) to cause a relative rolling motion, The neck ring (2.1) has a center point (O), and the tooth surfaces of the external gear of the gear tooth plate (2) and the internal ring of the ring gear tooth plate (3) have a contact point (D), and the center point (O) and the contact point (D) are connected to form a first connecting line (OD). Each tooth of the external gear of the gear tooth plate (2) has a first working arc segment (a to b), and the first working arc segments (a to b) of the contact teeth of the gear tooth plate (2) have a first arc segment center (O1), each tooth of the internal ring of the ring gear tooth plate (3) has a second working arc segment (c to d), and the second working arc segments (c to d) of the contact teeth of the ring gear tooth plate (3) have a second arc segment center (O2), and the first arc segment center (O1) and the second arc segment center (O2) are connected to form a second connecting line (O1O2), The contact point (D) is located on the second connecting line (O1O2), and the angle between the first connecting line (OD) and the second connecting line (O1O2) is between 85° and 95°. The first working arc segments (a to b) of the contact teeth of the gear tooth plate (2) have a first arc radius (R1), and the second working arc segments (c to d) of the contact teeth of the ring gear tooth plate (3) have a second arc radius (R2), and the ratio of the first arc radius (R1) to the second arc radius (R2) (R1 / R2) is between 1.05 and 1.

15. Each tooth of the external gear of the gear tooth plate (2) has a first tooth profile width (A), and each tooth of the internal ring of the ring gear tooth plate (3) has a second tooth profile width (B), and the tooth width ratio (A / B) of the first tooth profile width (A) to the second tooth profile width (B) is between 1.1 and 1.

6. A small, continuous-type reclining chair.

2. The drive cam (6) is characterized by including a cylindrical segment (6.1) that is inserted axially into the neck ring (2.1) and extends, The compact continuous reclining chair according to claim 1.

3. The gap between the cylindrical segment (6.1) and the neck ring (2.1) is characterized in that it is between 0.05 mm and 0.15 mm. The compact continuous reclining chair according to claim 2.

4. The drive cam (6) is characterized by being an integrally molded member. The compact continuous reclining chair according to claim 1.

5. The eccentric members (5, 7) are characterized by being restricted by the fitting of a wedge (5) and a spring (7) so that they are press-fitted into the internal tooth ring of the ring gear tooth plate (3) at the position where the external gear of the gear tooth plate (2) meshes. The compact continuous reclining chair according to claim 1.

6. The gear tooth plate (2) has a first stepped surface (2.2) for supporting the wedge (5), and the ring gear tooth plate (3) has a burring boss (3.1), and the first stepped surface (2.2) is provided close to the top surface (P3) of the burring boss (3.1). The compact continuous reclining chair according to claim 5.

7. The gear tooth plate (2) includes a boss for connecting a small continuous reclining device to an external connecting plate, a third stepped surface for supporting the external connecting plate, and a second stepped surface (2.3) press-formed together with the third stepped surface, characterized in that the first stepped surface (2.2) and the second stepped surface (2.3) are on the same plane. The compact continuous reclining chair according to claim 6.

8. The distance between the second stepped surface (2.3) and the third stepped surface is equal to the material thickness of the gear tooth plate (2), The compact continuous reclining chair according to claim 7.

9. The gear teeth plate (2) and the ring gear teeth plate (3) are further characterized by including a hoop (1) that integrally holds them together. The compact continuous reclining chair according to claim 7.

10. The third stepped surface has a protrusion height (d) so that the external connecting plate can be positioned on the third stepped surface while avoiding the hoop (1). The compact continuous reclining chair according to claim 9.

11. The wedge (5) is supported by the neck ring (2.1) with its curved inner surface and supports the ring gear tooth plate (3) with its curved outer surface. The compact continuous reclining chair according to claim 5.

12. The drive cam (6) has a drive segment (6.2), the wedge (5) is composed of two wedge sections, the drive segment (6.2) is inserted into the gap between the narrow sides of the two wedge sections, and both ends of the spring (7) are connected to the opposing wider sides of the two wedge sections, respectively, so that the spring (7) acts circumferentially on the wedge sections to forcibly separate them. The compact continuous reclining chair according to claim 11.

13. The feature further includes a friction bearing (4) provided between the curved outer surface of the wedge (5) and the central hole (3.1) of the ring gear tooth plate (3). The compact continuous reclining chair according to claim 11.

14. The drive cam (6) is covered by a cover (8) which is fixedly connected to the ring gear tooth plate (3), and the features further include The compact continuous reclining chair according to claim 11.

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