A seat armrest rotation locking mechanism

Abstract

The present invention belongs to the technical field of seats, and specifically relates to a seat armrest rotation locking mechanism, comprising a rotating shaft that can be fixed on a seat back or a seat armrest, the rotating shaft is provided with a bearing, a clutch disc, a control ring and an inner gear disc, the rotating shaft is fixedly connected to the clutch disc, the control ring is fixedly connected to the inner gear disc, the bearing is rotatably connected to the rotating shaft and fixedly connected to the inner gear disc, the clutch disc is hinged with a locking tooth on the side facing the control ring, the boss on the outer end surface of the locking tooth extends into the arc groove of the control ring, an elastic sheet extends from the bottom of the groove on the opposite side of the boss to the direction of the boss side in the arc groove of the control ring, the head of the elastic sheet and the inner side wall of the arc groove are correspondingly provided with grooves that can clamp the boss, an operating spring is provided between the clutch disc and the locking tooth, and since the control ring and the elastic sheet are manufactured in one piece, the structure is simple, the working stability is good, and the cost is low.

Description

Technical Field

[0001] The invention belongs to the technical field of seats, and in particular relates to a rotation locking mechanism for a seat armrest. Background Art

[0002] At present, the rotation locking mechanism of the seat armrest mostly adopts a locking tooth that rotates to the end of the locking position that cooperates with the inner gear plate, and a curved hook design at the end of the locking tooth is inserted into the groove of the inner gear plate. After being inserted, an independently arranged spring plays a compression and locking role without a pushing effect. Since the ordinary spring is independently arranged, a spring fixing structure needs to be respectively arranged at both ends of the spring, which not only increases the difficulty in manufacturing the spring fixing structure, but also causes the structure to be arranged in a smaller space to occupy the space of other component structures, and also increases the cost of manufacturing, installing and purchasing ordinary springs.

[0003] In addition, when the seat armrest locking mechanism rotates, due to the use of solid support bearings, there is a large gap between the corresponding structures of the rotating pair. Collisions and noises caused by shaking during rotation will also cause premature damage to the structure and reduce its service life. Summary of the invention

[0004] The object of the present invention is to provide a seat armrest rotation locking mechanism which simplifies the complexity of the mechanism of the seat armrest rotation locking mechanism and reduces or avoids the characteristics of shaking, collision, noise and the like.

[0005] The object of the present invention is to solve like this:

[0006] A seat armrest rotation locking mechanism comprises a rotating shaft that can be fixed on a seat back or a seat armrest, the rotating shaft is provided with a bearing, a clutch plate, a control ring and an inner gear plate, the rotating shaft is fixedly connected to the clutch plate, the control ring is fixedly connected to the inner gear plate, the bearing is rotationally connected to the rotating shaft and fixedly connected to the inner gear plate, the clutch plate is hinged with a locking tooth on one side facing the control ring, the convex column on the outer end surface of the locking tooth extends into the arc groove of the control ring, an elastic sheet extends from the groove bottom on the opposite side of the convex column to the direction of the convex column side in the arc groove of the control ring, and the head of the elastic sheet A groove that can engage with the boss is correspondingly arranged on the inner side wall of the arc groove, and an operating spring is arranged between the clutch disk and the locking tooth. The operating spring changes the direction of the elastic force as the radial and circumferential positions of the boss in the arc groove on the control ring change. When the boss is rotated to be engaged in the groove, the outer teeth on the locking tooth are separated from the inner teeth on the clutch disk. At other positions, the operating spring applies force to the outer teeth in the direction of meshing with the inner teeth. When the rotation stops, the outer teeth are meshed and locked with the inner teeth, thereby realizing the adjustment of the gear position and the switching of the free range.

[0007] As a further optimization of the above technical solution, the distance between the head of the elastic sheet and the inner wall of the arc groove gradually increases from the groove toward the outer end of the elastic sheet, forming a trumpet-shaped guide opening for the protruding column on the locking tooth.

[0008] As a further optimization of the above technical solution, the control ring and the elastic sheet are an integrated structure made of spring steel.

[0009] As a further optimization of the above technical solution, the bearing is integrally formed with two or more axial convex teeth on an annular base made of plastic material, an arc-shaped through hole that passes axially through the convex teeth is centrally arranged, and more than two tooth grooves are arranged on the central hole wall of the inner gear disk. The convex teeth of the bearing cooperate with the tooth grooves on the inner gear disk to achieve circumferential positioning, and the inner wall of the bearing cooperates with the rotating shaft for rotation.

[0010] As a further optimization of the above technical solution, a retaining ring is clamped on the rotating shaft outside the inner gear disc to achieve axial positioning of the inner gear disc.

[0011] As a further optimization of the above technical solution, the locking tooth is an arc-shaped structure, one end of the locking tooth is provided with a hinge hole, the other end is provided with a spring slot, and a plurality of external teeth are provided on the outer side of the locking tooth on the spring slot side.

[0012] As a further optimization of the above technical solution, the hinge column arranged on the clutch disk extends into the hinge hole of the locking tooth, so that the locking tooth can rotate around the hinge column on the clutch disk.

[0013] As a further optimization of the above technical solution, a spring mounting column is provided on the clutch disc, one end of the operating spring is mounted on the spring mounting column, and the other end of the operating spring is connected to the arc groove at the end of the locking tooth. The operating spring changes the direction of the elastic force as the radial and circumferential position of the boss in the arc groove on the control ring changes.

[0014] The outstanding advantages of the present invention over the prior art are:

[0015] 1. Since the present invention has an elastic sheet integrally formed on the control ring, firstly, the increase in production cost and material cost due to manufacturing and installation of ordinary springs is eliminated; secondly, the space structure such as the fixing seat required for installing the spring is omitted; thirdly, the elastic sheet has a simple structure, a reasonable structural position, and good working stability; fourthly, since the elastic sheet is a structure reserved on the originally cut arc hole, it is equivalent to turning waste into treasure, saving the material cost of the original single use of ordinary springs, etc.

[0016] 2. Since the convex teeth of the bearing of the present invention are centrally provided with an arc-shaped through hole that penetrates axially, and the bearing is made of plastic material, the plastic material has space for elastic deformation, so that the bearing and the rotating shaft can be interference-fitted, and the convex teeth on the bearing and the tooth grooves on the inner gear disc can be interference-fitted, which reduces the shaking amount of the mating parts, thereby reducing the wear and noise caused by the mutual collision caused by the shaking, and increasing the service life of the product.

[0017] 3. The invention has reasonable structural design, stable performance, saves raw materials, and is suitable for the rotation locking mechanism of the seat armrest. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an exploded schematic diagram of the present invention.

[0019] Figure 2 It is a three-dimensional schematic diagram of the present invention.

[0020] Figure 3 It is an axial cross-sectional view of the present invention.

[0021] Figure 4 It is a front view of the present invention when only the control ring, the locking teeth and the operating spring are included.

[0022] Figure 5 It is a three-dimensional schematic diagram of the locking tooth of the present invention.

[0023] Figure 6 It is the front view of the present invention.

[0024] Figure 7 yes Figure 6 AA section view

[0025] Figure 8 It is a three-dimensional schematic diagram of the inner gear disc of the present invention DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to specific embodiments of the present invention. Figure 1-Figure 8 :

[0027] A seat armrest rotation locking mechanism, comprising a rotating shaft 90 that can be fixed on a seat back or a seat armrest, the rotating shaft 90 is provided with a bearing 30, a clutch disc 50, a control ring 40 and an inner gear disc 20, the rotating shaft 90 is fixedly connected to the clutch disc 50, the control ring 40 is fixedly connected to the inner gear disc 20, the bearing 30 is rotationally connected to the rotating shaft 90 and fixedly connected to the inner gear disc 20, the clutch disc 50 is hinged with a locking tooth 70 on one side facing the control ring 40, a boss 51 on the outer end surface of the locking tooth 70 extends into an arc groove 41 of the control ring 40, and an elastic sheet 45 on the opposite side of the boss 51 extends from the arc groove 41 of the control ring 40 to the direction of the boss 51 side. 45, a groove 44 for engaging the boss 51 is correspondingly provided on the head of the elastic sheet 45 and the inner side wall of the arc groove 41, an operating spring 50 is provided between the clutch disc 50 and the locking tooth 70, the operating spring 50 changes the direction of the elastic force as the radial and circumferential positions of the boss 73 in the arc groove 41 on the control ring 40 change, when the boss 73 rotates to be engaged in the groove 44, the outer teeth 72 are separated from the inner teeth 23 on the inner gear disc 20, and at other positions the operating spring 70 applies force to the outer teeth 72 in the meshing direction of the inner teeth 23, and when the rotation stops, the outer teeth 72 are meshed and locked with the inner teeth 23, thereby realizing the adjustment of the gear position and the switching of the free range.

[0028] As a further optimization of the above technical solution, the width of the elastic sheet 45 is gradually reduced from the root 47 of the elastic sheet 44 of the arc groove 41 of the control ring 40 to the head 43 .

[0029] As a further optimization of the above technical solution, the elastic sheet 45 is an arc-shaped body.

[0030] As a further optimization of the above technical solution, the distance between the head of the elastic sheet 45 and the inner wall 48 of the arc groove 41 gradually increases from the groove toward the outer end of the elastic sheet 45, forming a trumpet-shaped guide opening 42 for the protrusion 51 on the locking tooth 70.

[0031] As a further optimization of the above technical solution, the control ring 40 and the elastic sheet 45 are an integrated structure made of spring steel.

[0032] As a further optimization of the above technical solution, the bearing 30 is integrally formed with two or more axial convex teeth 32 on an annular base 31 made of plastic material, and an axially penetrating arc-shaped through hole 33 is centrally arranged on the convex tooth 32. More than two tooth grooves 22 are arranged on the wall of the center hole 21 of the inner gear disk 20. The convex teeth 32 of the bearing 30 cooperate with the tooth grooves 22 on the inner gear disk 20 to achieve circumferential positioning, and the inner wall of the bearing 30 rotates with the rotating shaft 90.

[0033] As a further optimization of the above technical solution, a retaining ring 10 is clamped on the rotating shaft 90 outside the inner gear disc 20 through a clamping groove 92 to realize the axial positioning of the inner gear disc 20.

[0034] Of course, the seat armrest rotating device also includes a shell 80 that can be fixed on the seat armrest or the seat back and a first bearing installed in the shell 80, and axial positioning is achieved by a retaining spring 61 that is clamped on the slot 91 of the rotating shaft 90. The shell 80 is fixedly connected to the inner gear disc 20.

[0035] As a further optimization of the above technical solution, the locking tooth 70 is an arc-shaped structure, a hinge hole 71 is provided at one end of the locking tooth 70, a spring slot 74 is provided at the other end, and a plurality of external teeth 72 are provided on the outer surface of the locking tooth 70 on the side of the spring slot 74.

[0036] As a further optimization of the above technical solution, the hinge column 43 provided on the clutch disk 50 extends into the hinge hole 71 of the locking tooth 70 , so that the locking tooth 70 can rotate around the hinge column 43 on the clutch disk 50 .

[0037] As a further optimization of the above technical solution, a spring mounting column 51 is provided on the clutch disc 50, one end of the operating spring 52 is mounted on the spring mounting column 51, and the other end of the operating spring 52 is connected to the arc groove 74 at the end of the locking tooth 70. The operating spring 52 changes the direction of the elastic force as the radial and circumferential position of the boss 73 in the arc groove 41 on the control ring 40 changes, thereby realizing the adjustment of the gear position and the switching of the free range.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions or technical features described in the aforementioned embodiments can still be simply replaced or modified with similar technologies, and these simple replacements or modifications do not deviate the essence of the corresponding technical solutions from the spirit and essence of the technical solutions of the embodiments of the present invention, and are still within the protection scope of the present invention.

Claims

1. A seat armrest rotation locking mechanism, characterized in that: The invention comprises a rotating shaft which can be fixed on a seat back or a seat armrest, wherein a bearing, a clutch plate, a control ring and an inner gear plate are mounted on the rotating shaft, wherein the rotating shaft is fixedly connected to the clutch plate, wherein the control ring is fixedly connected to the inner gear plate, wherein the bearing is rotatably connected to the rotating shaft and fixedly connected to the inner gear plate, wherein a locking tooth is hingedly connected to the clutch plate on one side facing the control ring, wherein a convex column on the outer end surface of the locking tooth extends into an arc groove of the control ring, wherein an elastic sheet extends from the groove bottom on the opposite side of the convex column to the direction of the convex column side in the arc groove of the control ring, wherein the head of the elastic sheet is connected to the arc groove A groove that can be engaged with the boss is correspondingly provided on the inner side wall, and an operating spring is provided between the clutch disk and the locking tooth. The operating spring changes the direction of the elastic force as the radial and circumferential positions of the boss in the arc-shaped groove on the control ring change. When the boss is rotated to be engaged in the groove, the outer teeth on the locking tooth are separated from the inner teeth on the clutch disk. At other positions, the operating spring applies force to the outer teeth in the direction of meshing with the inner teeth. When the rotation stops, the outer teeth are meshed and locked with the inner teeth, thereby realizing the adjustment of the gear position and the switching of the free range.

2. The seat armrest rotation locking mechanism according to claim 1, characterized in that: The width of the elastic sheet gradually decreases from the root of the groove bottom to the head of the arc groove of the control ring.

3. The seat armrest rotation locking mechanism according to claim 1, characterized in that: The elastic sheet is an arc-shaped body.

4. The seat armrest rotation locking mechanism according to claim 1, characterized in that: The distance between the head of the elastic sheet and the inner wall of the arc groove gradually increases from the groove toward the outer end of the elastic sheet, forming a trumpet-shaped guide opening for the convex column on the locking tooth.

5. The seat armrest rotation locking mechanism according to claim 1, characterized in that: The control ring and the elastic sheet are an integrated structure made of spring steel.

6. The seat armrest rotation locking mechanism according to claim 1, characterized in that: The bearing is integrally formed with two or more axial convex teeth on an annular base made of plastic material, an arc-shaped through hole that passes axially through the convex teeth is centrally arranged, and more than two tooth grooves are arranged on the central hole wall of the inner gear disk. The convex teeth of the bearing cooperate with the tooth grooves on the inner gear disk to achieve circumferential positioning, and the inner wall of the bearing cooperates with the rotating shaft for rotation.

7. The seat armrest rotation locking mechanism according to claim 1, characterized in that: A retaining ring is clamped on the rotating shaft outside the inner gear disc to achieve axial positioning of the inner gear disc.

8. A seat armrest rotation locking mechanism according to any one of claims 1 to 7, characterized in that: The locking tooth is an arc-shaped structure, one end of the locking tooth is provided with a hinge hole, the other end is provided with a spring slot, and the outer side surface of the locking tooth on the spring slot side is provided with a plurality of external teeth.

9. The seat armrest rotation locking mechanism according to claim 8, characterized in that: The hinge column arranged on the control ring extends into the hinge hole of the locking tooth, so that the locking tooth can rotate around the hinge column on the control ring.

10. The seat armrest rotation locking mechanism according to claim 8, characterized in that: A spring mounting column is provided on the clutch disc, one end of the operating spring is mounted on the spring mounting column, and the other end of the operating spring is connected to the arc groove at the end of the locking tooth. The operating spring changes the direction of the elastic force as the radial and circumferential position of the protruding column in the arc groove on the control ring changes.

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