Seat armrest assembly adjustment device

Abstract

The present invention discloses a seat armrest assembly adjustment device, comprising a fixed plate; at least one tooth block, one end of the tooth block is movably connected to the fixed plate, the other end of the tooth block is provided with a first toothed belt, the end face of the tooth block on the side away from the fixed plate is provided with a protrusion, the protrusion is located at the end of the first toothed belt on the tooth block; a spring continuously applies a pre-pressure to the tooth block; at least one guide channel and a driving part are opened on the unlocking plate, the protrusion is located in the guide channel, and the rotating guide part has a first rotating end face and a second rotating end face; the driving plate is located on the side of the unlocking plate away from the tooth block, an accommodating space is enclosed between the driving plate and the fixed plate, and the tooth block, the spring and the unlocking plate are located in the accommodating space; the driving plate is provided with a second toothed belt, a driving part and a rotating part; the driving part is located in the rotating guide part; a driving shaft is connected to the rotating part, and forces the driving plate to rotate when the seat armrest assembly rotates.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile seat accessories, and in particular relates to a seat armrest assembly adjusting device. Background Art

[0002] With the continuous development of the automobile and home furnishing industries, people's requirements for seat comfort are further improved. As part of the backrest, the armrest plays an important role in alleviating the discomfort caused by the upper limbs hanging in the air for a long time. Especially in the automobile industry, with the introduction of new MPV and SUV models, higher and higher requirements are put forward for the operating comfort, abuse resistance and safety of the seat armrest assembly.

[0003] In the prior art, one is to use an external meshing ratchet pawl step-by-step adjustment structure. This armrest structure is large in size and has poor adjustment accuracy. In some solutions, the mechanism needs to be built into the armrest assembly, resulting in a large armrest shape and affecting the appearance. There is also a stepless adjustment armrest, which uses the spiral spring clamping friction self-locking principle, has limited friction torque and low strength, and cannot further meet some demanding requirements. At the same time, the operating torque varies greatly and the comfort is poor. Summary of the invention

[0004] The purpose of the present invention is to provide a seat armrest assembly adjustment device, and its purpose is to provide a seat armrest assembly adjustment solution. By adopting a ratchet pawl internal meshing structure, step-by-step adjustment without unlocking action upwards and a downward locking function are achieved; the problems of traditional armrest adjustment devices being large in size, insufficient locking strength, and unable to further meet development needs are effectively solved.

[0005] To solve the above technical problems, the purpose of the present invention is achieved as follows:

[0006] A seat armrest assembly adjustment device, comprising

[0007] Fixed plate;

[0008] at least one tooth block, one end of the tooth block is movably connected to the fixed plate, a first toothed belt is provided on the side of the tooth block away from the connection end of the tooth block and the first boss, and a protrusion is provided on the end surface of the tooth block away from the fixed plate, and the protrusion is located at the end of the tooth block where the first toothed belt is located;

[0009] A spring, one end of which is fixed to the fixing plate and the other end of which is in contact with the tooth block, wherein the spring continuously applies a pre-pressure to the tooth block;

[0010] An unlocking piece is located on the side of the tooth block away from the fixed plate, at least one guide channel and a driving part are provided on the unlocking piece, the protrusion is located in the guide channel, and the rotation guide part has a first rotation end face and a second rotation end face;

[0011] The driving plate is located on the side of the unlocking piece away from the tooth block, and an accommodating space is enclosed between the driving plate and the fixed plate, and the tooth block, spring and the unlocking piece are located in the accommodating space; the driving plate is provided with a second toothed belt, a driving part and a rotating part; the pre-pressure causes the tooth block to drive the first toothed belt to move toward the side where the second toothed belt is located, and the driving part is located in the rotating guide part, and the unlocking piece can be driven to rotate synchronously after the driving part contacts the first rotating end face or rotates a set angle to contact the second rotating end face; the end of the guide channel is provided with a groove on the inner surface close to the side where the second toothed belt is located, and when the unlocking piece rotates, the protrusion slides along the guide channel into the groove or slides out of the groove into the guide channel and continues to slide along the guide channel;

[0012] Only when the protrusion slides into the groove, the first toothed belt is engaged with the second toothed belt.

[0013] A drive shaft connected to the rotating portion and forcing the drive plate to rotate when the seat armrest assembly rotates;

[0014] When the seat armrest assembly is at the lowest position, the protrusion is located in the groove.

[0015] On the basis of the above scheme and as a preferred scheme of the above scheme: the end face of the fixed plate facing the tooth block is provided with at least one first boss and a second boss the same number as the first boss, one end of the tooth block is provided with a mounting hole, the mounting hole is sleeved on the first boss and the two are clearance-matched, and one end of the spring is clamped on the second boss.

[0016] On the basis of the above scheme and as a preferred scheme of the above scheme: the driving part includes symmetrically arranged lugs, the rotating guide part includes a guide groove corresponding to the lug, the width of the guide groove is greater than the width of the lug, and the first rotating end face and the second rotating end face are located at the two farthest ends of the guide groove.

[0017] On the basis of the above scheme and as a preferred scheme of the above scheme: the driving shaft passes through the rotating part and the fixing plate in sequence and is axially fixed by an elastic pressure plate.

[0018] On the basis of the above scheme and as a preferred scheme of the above scheme: a ring is arranged outside the fixing plate and the driving plate, and the ring partially or completely shields the fixing plate and the driving plate.

[0019] On the basis of the above scheme and as a preferred scheme of the above scheme: an elastic sealing body is provided between the side of the driving plate away from the unlocking piece and the enveloping ring, and the elastic sealing body is in contact with both the driving plate and the enveloping ring.

[0020] On the basis of the above scheme and as a preferred scheme of the above scheme: the drive plate is provided with an annular groove on the end surface of the side of the elastic sealing body, and the elastic sealing body is embedded in the annular groove.

[0021] On the basis of the above scheme and as a preferred scheme of the above scheme: an unlocking piece accommodating groove is provided in the end surface of the driving plate facing the side where the unlocking piece is located, and the unlocking piece is received in the unlocking piece accommodating groove.

[0022] On the basis of the above scheme and as a preferred scheme of the above scheme: a mounting hole is opened in the middle of the fixing plate, one end of the driving shaft is inserted into the mounting hole, and a bushing is provided between the inner hole of the mounting hole and the outer surface of one end of the driving shaft.

[0023] On the basis of the above scheme and as a preferred scheme of the above scheme: the fixed plate is fixedly connected to the seat backrest and the drive shaft is fixedly connected to the seat armrest assembly or the drive shaft is fixedly connected to the seat backrest and the fixed plate is fixedly connected to the seat armrest assembly.

[0024] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects: by adopting a ratchet pawl internal meshing structure, step-by-step adjustment upwards without the need for unlocking and a downward locking function can be achieved; the present invention effectively solves the problems of traditional armrest adjustment devices being large in size, insufficient locking strength, and unable to further meet development needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the movement position of the seat armrest assembly;

[0026] Figure 2 It is a schematic diagram of the installation position structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the decomposed structure of the present invention;

[0028] Figure 4 is a cross-sectional view of the present invention;

[0029] Figure 5 It is a schematic diagram of the gear block and spring installation structure;

[0030] Figure 6 It is a schematic diagram of the gear block structure;

[0031] Figure 7 1. It is a schematic diagram of the structure of the installation position of the unlocking piece;

[0032] Figure 8 Schematic diagram of the matching structure between the unlocking piece and the protrusion;

[0033] Fig. 9 It is a schematic diagram of the drive plate structure and the unlocking piece structure;

[0034] Fig.10 It is a schematic diagram of the matching structure of the gear block and the drive plate;

[0035] Fig.11 is a schematic diagram of the unlocking piece structure;

[0036] Fig.12 It is a schematic diagram of the installation position of the elastic sealing body. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of this application clearer, the technical solution in the embodiment will be clearly and completely described below in conjunction with the drawings in the embodiment. Obviously, the described embodiment is only a part of the embodiment of this application, not all embodiments. Based on the given embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0038] In the description of the present application, it should be understood that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0039] In the description of this application, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0040] Embodiment 1

[0041] A seat armrest assembly adjustment device, comprising

[0042] The fixing plate 1 has an end surface facing the tooth block 3 and is provided with at least one first boss 11 and a second boss 12 having the same number as the first boss.

[0043] At least one tooth block 3, one end of the tooth block 3 is movably connected to the fixed plate 1, and a first toothed belt 33 is provided on the side of the tooth block 3 away from the connection end of the tooth block 3 and the first boss 11. The tooth block 3 is provided with a protrusion 32 on the end face of the side away from the fixed plate 1, and the protrusion 32 is located at the end of the first toothed belt 33 of the tooth block 3; in this embodiment, a mounting hole 31 is opened at one end of the tooth block 3, and the mounting hole 31 is sleeved on the first boss 11 and the two are clearance-matched, so as to realize the rotation of the tooth block 3 around the first boss 11, and the first toothed belt 33 is preferably arranged on the side of the side away from the protrusion 32.

[0044] The spring 4 has one end fixed to the fixed plate 1 and the other end in contact with the tooth block 3. The spring 4 continuously applies a preload F1 to the tooth block 3. Specifically, in this embodiment, one end of the spring 4 is curled into a ring shape, and the ring-shaped end is clamped on the second boss 12 to fix the spring. It should be noted that the spring in this embodiment can be a scroll spring, a leaf spring, or a torsion spring.

[0045] The unlocking piece 5 is located on the side of the tooth block 3 away from the fixed plate 1. At least one guide channel 51 and a driving part 52 are opened on the unlocking piece 5. The protrusion 32 is located in the guide channel 51. The rotating guide part 52 has a first rotating end face 52a and a second rotating end face 52b.

[0046] The driving plate 6 is located on the side of the unlocking piece 5 away from the tooth block 3. An accommodating space is enclosed between the driving plate 6 and the fixed plate 1. The tooth block 3, the spring 4 and the unlocking piece 5 are located in the accommodating space; the driving plate 6 is provided with a second toothed belt 61, a driving part 63 and a rotating part 64; the pre-pressure F1 causes the tooth block 3 to drive the first toothed belt 33 to move toward the side where the second toothed belt 61 is located so that the first toothed belt 33 and the second toothed belt 61 are meshed, and the driving part 63 is located in the rotating guide part 52. After the driving part 63 contacts the first rotating end face 52a or rotates a set angle to contact the second rotating end face 52b, the unlocking piece 5 can be driven to rotate synchronously; the guide passage The end of the guide channel 51 is provided with a groove 511 on the inner surface near the side where the second toothed belt 61 is located. When the unlocking piece 5 rotates, the protrusion 32 slides along the guide channel 51 into the groove 511 or slides out of the groove 511 into the guide channel 51 and then continues to slide along the groove 511. Specifically, the driving part 63 includes symmetrically arranged lugs 631, and the rotation guide part 52 includes a guide rotation guide part 521 corresponding to the lugs 631. The width of the guide rotation guide part 521 is greater than the width of the lugs 631. The first rotation end face 52a and the second rotation end face 52b are located at the two farthest ends of the guide rotation guide part 521. It is further preferred that an unlocking piece accommodating groove 62 is provided in the end face of the driving plate 6 facing the side where the unlocking piece 5 is located, and the unlocking piece 5 is received in the unlocking piece accommodating groove 62.

[0047] Only when the protrusion 32 slides into the groove 511 , the first toothed belt 33 is meshed with the second toothed belt 61 .

[0048] A drive shaft 7 connected to the rotating portion 64 and forces the drive plate 6 to rotate when the seat armrest assembly rotates;

[0049] When the seat armrest assembly is located at the lowest position, the protrusion 32 is located in the groove 511 .

[0050] In this embodiment, it is preferred that a mounting hole 13 is opened in the middle of the fixed plate 1, and one end of the drive shaft 7 is inserted into the mounting hole 13. A bushing 2 is provided between the inner hole of the mounting hole 13 and the outer surface of one end of the drive shaft. The drive shaft 7 passes through the rotating portion 64 and the bushing 2 in sequence and is axially fixed by an elastic pressure plate 8; it is preferred that the elastic pressure plate 8 is fixedly connected to the drive shaft 7 by riveting. After the connection, the elastic pressure plate 8 can provide axial elastic pressure, increase the friction torque between the fixed plate 1 and the drive plate 6, and provide a good operating feel for the armrest operation. In addition, it is further preferred that a ring 10 is provided on the outside of the fixed plate 1 and the drive plate 6, and the ring 10 partially or completely covers the fixed plate 1 and the drive plate 6. It is preferred that the ring 10 is fixedly connected to the fixed plate 1. Furthermore, an elastic sealing body 9 is provided between the side of the driving plate 6 facing away from the unlocking piece 5 and the encapsulating ring 10, and the elastic sealing body 9 is in contact with both the driving plate 6 and the encapsulating ring 10. The elastic sealing body 9 presses the driving plate 6 and the encapsulating ring 10 to provide axial pressure to prevent loosening; preferably, an annular groove is provided on the end face of the driving plate 6 on the side of the elastic sealing body 9, and the elastic sealing body 9 is embedded in the annular groove.

[0051] In this embodiment, the fixed plate 1 is fixedly connected to the backrest of the seat and the drive shaft 7 is fixedly connected to the seat armrest assembly. The drive shaft 7 is driven to rotate by the seat armrest assembly, and the drive shaft 7 drives the rotating portion 64 to drive the drive plate 6 to rotate.

[0052] The working principle of the present invention is:

[0053] Upward adjustment process: Figure 1 , when the armrest is in the lowest position (initial locking position):

[0054] The boss 32 of the tooth block 3 is located in the groove 511 of the guide channel 51, and is adjacent to the surfaces 51a and 51d of the groove 511 (e.g. Figure 8 The driving portion 63 of the driving plate 6 is located in the guide groove 521 of the rotation guide portion 52, and a side surface 63a of the driving portion 63 is adjacent to the side surface 52a of the guide groove 521 (eg Fig. 9 ).like Figure 1 , the armrest is adjusted upward to enter the step-by-step adjustment range. The specific working principle is as follows: when the armrest is rotated, the seat armrest assembly drives the drive plate 6 to rotate counterclockwise through the drive shaft 7. At this time, the side 63a of the drive part 63 starts to move away from the side 52a of the guide groove 521 and approaches the other side 52b of the guide groove 521 (such as Fig. 9, 10), while the driving plate 6 rotates, the teeth of the second toothed belt 61 begin to slide relative to the teeth of the first toothed belt 33, so that the tooth block 3 overcomes the preload F1 of the spring 4, so that the tooth block 3 rotates along the central axis of its inner hole 31 and disengages from the teeth of the second toothed belt 61. Due to the preload F1 of the spring 4, after the teeth of the first toothed belt 33 slide along the teeth of the second toothed belt 61 past the highest point (i.e., the distance of rotating one tooth), the preload will force the first toothed belt 33 to quickly cling to and lock with the next tooth position of the second toothed belt 61, completing the step-by-step adjustment action; it should be noted that within the step-by-step adjustment range, at least one tooth position can be continuously rotated upward. Further, when the side 63b of the driving part 63 contacts the side 52b of the upper guide groove 521 during the process of the seat armrest assembly continuing to adjust upward, the step-by-step adjustment range ends. It should be noted that during the upward step adjustment process of the seat armrest assembly, due to the use of the ratchet pawl internal meshing one-way locking structure, the upward step adjustment cannot be interrupted and can only be adjusted to the end of the step adjustment range and enter any position in the empty range. Only then can the seat armrest assembly be adjusted downward back to the lowest position and locked (i.e., the initial locking position).

[0055] like Figure 1 After the seat armrest assembly passes the step adjustment range, if the seat armrest assembly continues to rotate upward, the seat armrest assembly will enter the empty range: at this time, the side 63b of the driving part 63 contacts the side 52b of the guide groove 521, thereby driving the unlocking piece 5 to start rotating. Further, the side 51a of the guide channel 51 fits the side 32a of the boss 32. As the unlocking piece 5 rotates, the boss 32 starts to slide on the side 51a of the guide channel 51, driving the tooth block 3 to rotate along the central axis of its inner hole 31, so that the first toothed belt 33 starts to move away from the second toothed belt 61, until the first toothed belt 33 is completely separated from the second toothed belt 61 (such as Figure 8 ). Further, as the rotation angle of the unlocking piece 5 increases, under the action of the preload F1 of the spring, the boss 32 maintains close contact with the side 51b of the guide channel 51 and generates relative sliding until the side 32a of the boss 32 contacts the side 51c of the guide channel 51, and the empty travel range of the seat armrest assembly ends (such as Figure 1 and Figure 8 ), at this time, the seat armrest assembly is in a fully retracted state.

[0056] Downward adjustment process:

[0057] As described above, the seat armrest assembly has a stepped adjustment range that ends and enters any position in the empty range, and the armrest assembly can be adjusted down to the lowest position and locked (i.e., the initial locking position). Its working distance is as follows: the seat armrest assembly rotates downward and drives the drive plate 6 to rotate in the opposite direction through the drive rod, and the side 63b of the drive part 63 gradually moves away from the side 52b of the guide groove 521 until the side 63a of the drive part 63 contacts the side 52a of the guide groove 521; as the seat armrest assembly continues to rotate downward, the drive part 63 drives the unlocking piece 5 to start rotating, and at the same time, the boss 32 starts to slide on the unlocking piece guide channel 51, so that the side 32a of the boss 32 moves away from the side 51c of the guide channel 51; when the boss 32 finishes sliding on the guide channel 51, under the action of the spring preload F1, the boss 32 starts to move in the groove 511, and the side 32a of the boss 32 starts to slide along the side 51a of the guide channel 51 to enter the groove 511, until the first toothed belt 33 is fully engaged with the second toothed belt 61, at this time, it is adjusted back to the lowest position and locked ( Figure 1 It should be noted that, in order to avoid the problem that the tooth block 3 cannot slide into the groove 511 along the side 51a of the guide channel 51 in time when the seat armrest assembly is adjusted downward too quickly, and misses the initial locking position, in this embodiment, when the armrest assembly is adjusted downward too quickly, the side 32b of the boss 32 will first hit the guide slope 51d of the guide channel 51. Since the guide slope 51d is inclined in the groove 511, the side 32b of the boss 32 will rotate downward along the guide slope 51d in time, so as to accurately enter the groove 511, so as to achieve the meshing of the first toothed belt 33 and the second toothed belt 61, so as to enter the initial locking position.

[0058] Embodiment 2

[0059] The difference between this embodiment and Example 1 is that the drive shaft 7 is fixedly connected to the seat back and the fixed plate 1 is fixedly connected to the seat armrest assembly, which means that the drive shaft 7 is fixed, and when the seat armrest assembly is rotated, the fixed plate 1 is driven to rotate relative to the drive shaft 7, so the seat armrest assembly can also be adjusted according to the same distance.

[0060] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A seat armrest assembly adjustment device, characterized in that: include Fixed plate (1); at least one tooth block (3), one end of the tooth block (3) being movably connected to the fixed plate (1), the other end of the tooth block (3) being provided with a first toothed belt (33), the end surface of the tooth block (3) being away from the fixed plate (1) being provided with a protrusion (32), the protrusion (32) being located at the end of the tooth block (3) where the first toothed belt (33) is located; A spring (4), one end of which is fixed to the fixed plate (1), and the other end of which is in contact with the tooth block (3), wherein the spring (4) continuously applies a pre-pressure to the tooth block (3); An unlocking piece (5) is located on the side of the tooth block (3) away from the fixed plate (1), and the unlocking piece (5) is provided with at least one guide channel (51) and a rotation guide portion (52), the protrusion (32) is located in the guide channel (51), and the rotation guide portion (52) has a first rotation end surface (52a) and a second rotation end surface (52b); The drive plate (6) is located on the side of the unlocking plate (5) away from the tooth block (3); a containing space is enclosed between the drive plate (6) and the fixed plate (1); the tooth block (3), the spring (4) and the unlocking plate (5) are located in the containing space; the drive plate (6) is provided with a second toothed belt (61), a driving part (63) and a rotating part (64); the pre-pressure causes the tooth block (3) to drive the first toothed belt (33) to move toward the side where the second toothed belt (61) is located; the driving part (63) is located in the rotating guide part (52); The driving part (63) can drive the unlocking piece (5) to rotate synchronously after contacting the first rotating end surface (52a) or rotating at a set angle to contact the second rotating end surface (52b); the end of the guide channel (51) is provided with a groove (511) on the inner surface of the side close to the second toothed belt (61); when the unlocking piece (5) rotates, the protrusion (32) slides along the guide channel (51) into the groove (511) or slides out of the groove (511) into the guide channel (51) and then continues to slide along the guide channel (51); Only when the protrusion (32) slides into the groove (511), the first toothed belt (33) and the second toothed belt (61) are engaged; A drive shaft (7) connected to the rotating portion (64) and forcing the drive plate (6) to rotate when the seat armrest assembly rotates; When the seat armrest assembly is at the lowest position, the protrusion (32) is located in the groove (511); The end surface of the fixing plate (1) facing the tooth block (3) is provided with at least one first boss (11) and a number of second bosses (12) that is the same as the number of the first bosses; one end of the tooth block (3) is provided with a first mounting hole (31); the first mounting hole (31) is sleeved on the first boss (11) and the two are clearance-matched; one end of the spring (4) is clamped on the second boss (12); The driving portion (63) includes symmetrically arranged lugs (631), the rotating guide portion (52) includes a guiding groove (521) corresponding to the lug (631), the width of the guiding groove (521) is greater than the width of the lug (631), and the first rotating end surface (52a) and the second rotating end surface (52b) are located at the two farthest ends of the guiding groove (521).

2. The seat armrest assembly adjustment device according to claim 1, characterized in that: The drive shaft (7) passes through the rotating portion (64) and the fixed plate (1) in sequence and is then axially fixed by an elastic pressure plate (8).

3. The seat armrest assembly adjustment device according to claim 1, characterized in that: An enveloping ring (10) is arranged outside the fixing plate (1) and the driving plate (6), and the enveloping ring (10) partially or completely shields the fixing plate (1) and the driving plate (6).

4. The seat armrest assembly adjustment device according to claim 3, characterized in that: An elastic sealing body (9) is provided between the side of the driving plate (6) facing away from the unlocking piece (5) and the enveloping ring (10), and the elastic sealing body (9) is in contact with both the driving plate (6) and the enveloping ring (10).

5. The seat armrest assembly adjustment device according to claim 4, characterized in that: The drive plate (6) is provided with an annular groove on the end surface of the side of the elastic sealing body (9), and the elastic sealing body (9) is embedded in the annular groove.

6. The seat armrest assembly adjustment device according to claim 1, characterized in that: An unlocking piece accommodating groove (62) is provided in the end surface of the driving plate (6) facing the unlocking piece (5) so as to receive the unlocking piece (5) in the unlocking piece accommodating groove (62).

7. The seat armrest assembly adjustment device according to claim 1, characterized in that: A second mounting hole (13) is provided in the middle of the fixing plate (1), one end of the driving shaft (7) is inserted into the second mounting hole (13), and a bushing (2) is provided between the inner hole of the second mounting hole (13) and the outer surface of one end of the driving shaft.

8. The seat armrest assembly adjustment device according to claim 1, characterized in that: The fixing plate (1) is fixedly connected to the backrest of the seat and the driving shaft (7) is fixedly connected to the seat armrest assembly, or the driving shaft (7) is fixedly connected to the backrest of the seat and the fixing plate (1) is fixedly connected to the seat armrest assembly.

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