An electrically powered handrail and a car seat incorporating the same

Abstract

The application discloses an electric handrail and a car seat provided with the electric handrail. The electric handrail comprises a base assembly, a transmission rod, a rotating drum, a power assembly and a handrail body. The transmission rod is axially slidably arranged on the base assembly and is provided with a first guide structure. A spiral groove is formed in the lateral wall of the rotating drum, and the first guide structure is slidably sleeved in the spiral groove. The lateral wall of the rotating drum is provided with a second guide structure which protrudes outward along the radial direction of the rotating drum. A guide groove is formed in the base assembly, and the second guide structure is slidably sleeved in the guide groove. The end of the rotating drum is fixedly connected with the handrail body. The handrail body can be telescopically moved or rotated under the driving action of the power assembly. The car seat comprises a backrest, and the electric handrail is arranged on the lateral wall of the backrest. The lateral wall of the backrest is provided with a receiving groove, and the handrail body can be accommodated in the receiving groove. The electric handrail can be swung at a large angle and occupies a small space, and the handrail of the car seat is compactly arranged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile parts, in particular to an electric handrail and an automobile seat provided with the electric handrail. BACKGROUND

[0002] There are mainly two forms of conventional automobile seat handrails, one of which is vertically arranged on the side of the seat back and can be manually turned forward, and the other of which is fixed on both sides of the seat. The two forms of conventional seat handrails have single functions and are inconvenient to use, and cannot meet the increasingly varied in-vehicle application environment.

[0003] The above two handrail mounting structures will occupy the space on the side of the seat back when the handrails are not used. Therefore, there are hidden seat handrails on the market, for example, the patent document with the announcement number CN114407744A discloses an electric handrail telescopic rotating mechanism, which mainly comprises a toothed gear cylindrical cam, a fixed sleeve, a pin A, a pin B, a rotating shaft, and a motor. The toothed gear cylindrical cam cooperates with the fixed sleeve, the fixed sleeve cooperates with the stepped hollow shaft to limit the other degrees of freedom of the toothed gear cylindrical cam, and only the rotational freedom of the toothed gear cylindrical cam is retained. The toothed gear cylindrical cam is provided with a displacement gear and a track groove C. The rotating shaft is provided with track grooves, which are track groove A, track groove B from right to left. The pin B is fixed on the rotating shaft, and the pin B moves relative to the track groove C on the toothed gear cylindrical cam. The pin A is fixed on the fixed sleeve, and the pin A moves linearly relative to the track groove A and rotates relative to the track groove B.

[0004] Based on the handrail telescopic rotating mechanism described in the above patent document, the handrail can be hidden and folded on the side of the seat back, and the space occupied on both sides of the seat when folding is reduced. However, it still has the following disadvantages: the extension movement and the rotation movement of the handrail are performed simultaneously, which is a compound movement. On the one hand, the handrail cannot be independently rotated, and cannot meet the requirement of large-angle swinging. On the other hand, the extension and rotation are performed simultaneously, the swinging space of the handrail is larger, and the compactness of the product after folding still has optimization space. SUMMARY

[0005] Therefore, the present application provides an electric handrail, which can realize the hidden folding of the handrail on the side of the seat back, and the extension and rotation during the unfolding of the handrail are independent movements.

[0006] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0007] An electric handrail, comprising: a base assembly for fixedly mounting inside a backrest; a transmission rod axially slidingly mounted relative to the base assembly, a first guide structure being provided on an outer end side wall of the transmission rod and protruding radially outwardly therefrom; a rotating drum rotatably sleeved on the outer end of the transmission rod, a spiral groove being formed in a side wall of the rotating drum, the first guide structure slidingly sleeving in the spiral groove, a second guide structure being provided on the side of the rotating drum and protruding radially outwardly therefrom; a handrail body fixedly connected to an outer end of the rotating drum; a guide groove being formed in the base assembly, the second guide structure slidingly sleeving in the guide groove, the guide groove having a strip-shaped groove section parallel to the sliding direction of the transmission rod and an arc-shaped groove section vertically communicated with an outer end of the strip-shaped groove section;

[0008] A power assembly is provided on the base assembly for driving the transmission rod to slide relative to the base assembly; in the sliding stroke of the transmission rod, when the second guide structure is located in the strip-shaped groove section, the rotating drum synchronously slides with the transmission rod to drive the handrail body to move in extension and retraction along the width direction of the backrest, and when the second guide structure is located in the arc-shaped groove section, the rotating drum can rotate relative to the transmission rod under the guidance of the first guide structure and the spiral groove to drive the handrail body to rotate.

[0009] With the above structure, the extension movement and the rotation movement of the handrail are independently performed, a large-angle swing can be realized, the use is convenient, and the increasingly varied in-vehicle application environment can be met. Moreover, the swing scanning space of the handrail is small, the overall layout is simple and compact.

[0010] As a preferred arrangement, the power assembly comprises a motor fixedly arranged on the base assembly, a lead screw driven by the motor, and a threaded fitting threadedly matched with the lead screw, the lead screw being rotatably arranged on the base assembly, the transmission rod being of a hollow structure, and the threaded fitting being fixedly assembled in the transmission rod. With the above structure, power is provided, and the movement of the handrail is stable.

[0011] As a preferred arrangement, the transmission rod is gap-sleeved on the lead screw, a rotation-preventing groove is formed in the side of the transmission rod, a rotation-preventing pin is fixedly arranged on the base assembly, and the inner end of the rotation-preventing pin is slidingly matched with the rotation-preventing groove. With the above structure, the rotation of the transmission rod is limited in a simple structure.

[0012] As a preferred arrangement, the base assembly comprises a support seat and a sleeve fixedly mounted on the support seat, the rotating drum is mounted in the sleeve, the rotation-preventing pin is fixedly inserted in the side wall of the sleeve, and the guide groove is arranged on the side wall of the sleeve. With the above structure, support is provided, and installation is facilitated.

[0013] As a preferred arrangement, the support seat extends along the axial direction of the transmission rod, an arc-shaped groove adapted to the outer wall of the sleeve is formed in the support seat, and the lower end of the sleeve is supported in the arc-shaped groove and fixedly connected with the support seat. With the above structure, installation is facilitated.

[0014] As preferred: the transition position of the strip-shaped groove section and the arc-shaped groove section is in an arc-shaped configuration. With the above structure, the handrail movement is smoother and more fluent.

[0015] As preferred: the transmission rod side wall is provided with a pin hole, the screw fitting is provided with a groove corresponding to the pin hole, and a pin is arranged in the pin hole and the groove to fix the screw fitting in the transmission rod. With the above structure, the structure is simple and convenient to install.

[0016] As preferred: the inner end of the rotating drum is provided with an avoiding groove along the axial direction, and the anti-rotation pin passes through the avoiding groove when the second guide structure is located in the inner end of the guide groove. With the above structure, the structure is compact and the anti-rotation pin is avoided.

[0017] As preferred: two first guide structures are symmetrically arranged on the transmission rod, two symmetric spiral grooves are arranged on the rotating drum, and the two first guide structures are respectively slidably sleeved in the two spiral grooves. With the above structure, the installation is convenient.

[0018] The utility model provides a kind of automobile seat, and its purpose is to solve the problem that the space layout of automobile seat handrail folding is not compact enough.

[0019] To achieve the above object, the technical scheme of the present application is as follows:

[0020] An automobile seat comprises a backrest, the backrest side is provided with a receiving groove, and the power assembly drives the transmission rod to slide inward, so that the handrail body can be accommodated in the receiving groove. With the above structure, the handrail can be hidden and accommodated in the receiving groove of the backrest side wall, and the structure layout is compact.

[0021] Compared with the prior art, the present application has the following advantages:

[0022] 1. The automobile seat side has a receiving groove adapted to the shape of the handrail body, and the handrail body can be hidden and accommodated in the receiving groove, so that the overall layout is simple and compact.

[0023] 2. The extension movement and rotation movement of the handrail body are independent, the handrail body is first extended outward and then rotated forward, which can realize large-angle swing adjustment with small swing space, smooth movement without jamming, meet the needs of multifunctional automobile seat, and improve the comfort of seat use. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic view of the automobile seat.

[0025] Figure 2 It is a structural schematic view of the electric handrail.

[0026] Figure 3 To show the explosion diagram of the internal structure of the electric handrail;

[0027] Figure 4 To show the explosion diagram of the connection mode of the transmission rod 2 and the threaded fitting 33;

[0028] Figure 5 To show the cross-sectional view of the mounting relationship of the electric handrail;

[0029] Figure 6 To show the schematic diagram of the outward extension of the handrail body 6;

[0030] Figure 7 To show the schematic diagram of the rotation of the handrail body 6;

[0031] Figure 8 To show the schematic diagram of the mounting of the handrail body 6 on the car seat;

[0032] Figure 9 To show the schematic diagram of the application of the electric handrail on the one-key bed function of the car seat. DETAILED DESCRIPTION

[0033] The application will be further described below in conjunction with the embodiments and the accompanying drawings.

[0034] As shown in Figure 2 and Figure 3 , an electric handrail comprises a base assembly 1 and a transmission rod 2, wherein the base assembly 1 is used for fixedly mounting inside a seat back A, and the transmission rod 2 is arranged along the length direction of the seat back A and is slidingly mounted in the axial direction relative to the base assembly 1. A rotating cylinder 4 is rotatably sleeved on the outer end of the transmission rod 2, and a handrail body 6 is fixedly connected to the outer end of the rotating cylinder 4. Two first guide structures 21 are symmetrically arranged on the side wall of the outer end of the transmission rod 2 and protrude outward in the radial direction. Two helical grooves 4a are formed in the side wall of the rotating cylinder 4, and the two first guide structures 21 are slidingly sleeved in the two helical grooves 4a, respectively. A second guide structure 41 protrudes outward in the radial direction of the rotating cylinder 4. A guide groove 1a is formed in the base assembly 1, and the second guide structure 41 is slidingly sleeved in the guide groove 1a.

[0035] As shown in Figure 3 and Figure 5 , the base assembly 1 comprises a support seat 11 and a sleeve 12 fixedly mounted on the support seat 11, the rotating cylinder 4 is mounted in the sleeve 12, the support seat 11 extends in the axial direction of the transmission rod 2, and an arc-shaped recess 11a adapted to the outer wall of the sleeve 12 is formed in the support seat 11, and the lower end of the sleeve 12 is supported in the arc-shaped recess 11a and fixedly connected with the support seat 11. As shown in the drawings, the guide groove 1a is formed in the side wall of the sleeve 12, and the guide groove 1a comprises a strip-shaped groove section 1a1 parallel to the sliding direction of the transmission rod 2 and an arc-shaped groove section 1a2 vertically connected to the outer end of the strip-shaped groove section 1a1.

[0036] As shown in Figure 3 and Figure 4 , the base assembly 1 is also provided with a power assembly 3 for driving the transmission rod 2, the power assembly 3 includes a motor 31 fixed on the base assembly 1, a lead screw 32 driven by the motor 31 and a threaded fitting 33 threadedly matched with the lead screw 32. The lead screw 32 is arranged along the length direction of the seat back A and is rotatably arranged on the base assembly 1. The transmission rod 2 is of a hollow structure, the threaded fitting 33 is fixedly assembled inside the transmission rod 2, the side wall of the transmission rod 2 is provided with a pin hole 2b, the threaded fitting 33 is provided with a groove 33a at a position corresponding to the pin hole 2b, and a pin is arranged in the pin hole 2b and the groove 33a to fix the threaded fitting 33 inside the transmission rod 2.

[0037] As shown in Figure 4 and Figure 5 , the side of the transmission rod 2 is provided with two symmetrical anti-rotation grooves 2a along the axial direction, two anti-rotation pins 13 protruding inward are fixedly arranged on the side wall of the sleeve 12, the inner ends of the two anti-rotation pins 13 are respectively slidably matched with the two anti-rotation grooves 2a, and the anti-rotation pins 13 are used to limit the rotation of the transmission rod 2. The inner end of the rotating cylinder 4 is provided with an avoiding groove 4b along the axial direction of the rotating cylinder 4, and the avoiding groove 4b is used to avoid the anti-rotation pin 13. When the second guide structure 41 is located at the inner end of the guide groove 1a, the anti-rotation pin 13 passes through the avoiding groove 4b.

[0038] In this embodiment, the power assembly 3 drives the transmission rod 2 to slide relative to the base assembly 1, as shown in Figure 6 , in the sliding stroke of the transmission rod 2, when the second guide structure 41 is located in the strip-shaped groove section 1a1, the rotating cylinder 4 slides synchronously with the transmission rod 2 to drive the armrest body 6 to move along the width direction of the back A. As shown in Figure 7 , when the second guide structure 41 is located in the arc-shaped groove section 1a2, under the guidance of the first guide structure 21 and the spiral groove 4a, the rotating cylinder 4 can rotate relative to the transmission rod 2 to drive the armrest body 6 to rotate. In this process, since the transition position of the strip-shaped groove section 1a1 and the arc-shaped groove section 1a2 is arc-shaped, the movement of the armrest body 6 is smooth and stable without jamming, the extension movement and the rotation movement are independently performed, the armrest body 6 can be adjusted at a large angle and the space is small, which meets the use requirements of the multifunctional seat.

[0039] As shown in Figure 1 and Figure 8 , an automobile seat includes a back A, the back A is provided with the above-mentioned electric armrest, the side wall of the back A is provided with a strip-shaped storage groove B, the strip-shaped storage groove B is shaped to adapt to the shape of the armrest, the armrest body 6 can be completely stored in the storage groove B when not in use, and the layout is compact; when in use, it can be stably and quickly unfolded. As shown in Figure 9As shown, when the seat uses the one-key bed function, the power assembly 3 can drive the transmission rod 2 to slide inward, the armrest body 6 is first rotated upward, and then moves inward to be hidden in the storage groove B, the seat back A is flat, and the armrest body is not blocked, flexible to use, can cooperate with various functions of the automobile seat, and improve the comfort of the seat use.

[0040] The working principle of the unfolding process of the armrest body 6 is that the motor 31 outputs power to drive the screw rod 32 to rotate, the transmission rod 2 and the threaded fitting 33 move synchronously, and slide outward under the limiting action of the anti-rotation pin 13. In the sliding process, the second guide structure 41 is first located in the strip-shaped groove section 1a1, the rotating drum 4 slides synchronously with the transmission rod 2 due to the limitation of the first guide structure 21 and the spiral groove 4a, drives the armrest body 6 to extend outward along the back width A direction, and the second guide structure 41 moves to the end of the strip-shaped groove section 1a1, and the armrest body 6 extends to the limit position; then the second guide structure 41 transitions from the strip-shaped groove section 1a1 to the arc-shaped groove section 1a2, the rotating drum 4 rotates relative to the transmission rod 2 under the guiding action of the first guide structure 21 and the spiral groove 4a, drives the armrest body 6 to rotate, and when the second guide structure 41 moves to the end of the arc-shaped groove section 1a2, the armrest body 6 rotates to the limit position.

[0041] The working principle of the folding process of the armrest body 6 is that the motor 31 drives the screw rod 32 to rotate reversely, the threaded fitting 33 is threadedly connected with the screw rod 32, the transmission rod 2 and the threaded fitting 33 move synchronously, the transmission rod 2 slides inward under the limiting action of the anti-rotation pin 13 and the anti-rotation groove 2a, the rotating drum 4 rotates under the guiding action of the first guide structure 21 and the spiral groove 4a, drives the armrest body 6 to rotate upward, the second guide structure 41 moves along the arc-shaped groove section 1a2 to the transition position of the arc-shaped groove section 1a2 and the strip-shaped groove section 1a1, the armrest body 6 rotates from the horizontal state to the vertical state, the transmission rod 2 continues to slide inward, the first guide structure 21 slides to the end of the spiral groove 4a, the rotating drum 4 moves inward synchronously with the transmission rod 2 under the limitation of the first guide structure 21, the second guide structure 41 moves along the strip-shaped groove section 1a1 to the end position, and the armrest body 6 is completely folded in the storage groove B.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present application, and those skilled in the art can make various similar modifications under the inspiration of the present application without departing from the purpose and claims of the present application. Such changes fall within the protection scope of the present application.

Claims

1. A power operated handrail, characterized by It includes: Base assembly (1) for fixed installation in the interior of backrest (A); transmission rod (2) is axially slidingly installed relative to the base assembly (1), the outer end side wall of the transmission rod (2) is provided with a first guide structure (21) which protrudes radially outward; rotating drum (4) is rotatably sleeved on the outer end of the transmission rod (2), the side wall of the rotating drum (4) is provided with a spiral groove (4a), the first guide structure (21) is slidingly sleeved in the spiral groove (4a), the side of the rotating drum (4) is provided with a second guide structure (41) which protrudes radially outward; Handrail body (6) is fixedly connected to the outer end of the rotating drum (4); The base assembly (1) is provided with a guide groove (1a), the second guide structure (41) is slidingly sleeved in the guide groove (1a), the guide groove (1a) has a strip-shaped groove section (1a1) parallel to the sliding direction of the transmission rod (2) and an arc-shaped groove section (1a2) vertically communicated at the outer end of the strip-shaped groove section (1a1); The base assembly (1) is provided with a power assembly (3) for driving the transmission rod (2) to slide relative to the base assembly (1); in the sliding stroke of the transmission rod (2), when the second guide structure (41) is located in the strip-shaped groove section (1a1), the rotating drum (4) slides synchronously with the transmission rod (2) to drive the handrail body (6) to move in the width direction of the backrest (A), when the second guide structure (41) is located in the arc-shaped groove section (1a2), under the guidance of the first guide structure (21) and the spiral groove (4a), the rotating drum (4) can rotate relative to the transmission rod (2) to drive the handrail body (6) to rotate.

2. An electrically powered handrail according to claim 1, characterised in that: The power assembly (3) includes a motor (31) fixedly arranged on the base assembly (1), a lead screw (32) driven by the motor (31) and a threaded fitting (33) threadedly engaged with the lead screw (32), the lead screw (32) is rotatably arranged on the base assembly (1), the transmission rod (2) is a hollow structure, and the threaded fitting (33) is fixedly arranged in the transmission rod (2).

3. An electrically powered handrail according to claim 2, characterised in that: The transmission rod (2) is gap-sleeved on the lead screw (32), the side of the transmission rod (2) is provided with an anti-rotation groove (2a), the base assembly (1) is fixedly provided with an anti-rotation pin (13), and the inner end of the anti-rotation pin (13) is slidingly matched with the anti-rotation groove (2a).

4. An electrically powered handrail as claimed in claim 3, characterised in that: The base assembly (1) includes a support seat (11) and a sleeve (12) fixedly installed on the support seat (11), the rotating drum (4) is installed in the sleeve (12), the anti-rotation pin (13) is fixedly inserted in the side wall of the sleeve (12), and the guide groove (1a) is arranged on the side wall of the sleeve (12).

5. An electrically powered handrail as claimed in claim 4, characterised in that: The support seat (11) extends axially along the transmission rod (2), and is provided with an arc-shaped groove (11a) adapted to the outer wall of the sleeve (12), the lower end of the sleeve (12) is supported in the arc-shaped groove (11a) and fixedly connected with the support seat (11).

6. An electrically powered handrail as claimed in claim 1, characterised in that: The transition position of the strip-shaped groove section (1a1) and the arc-shaped groove section (1a2) is arc-shaped.

7. An electrically powered handrail as claimed in claim 2, characterised in that: The transmission rod (2) is provided with a pin hole (2b) in the side wall, the threaded fitting (33) is provided with a groove (33a) corresponding to the position of the pin hole (2b), and a pin is arranged in the pin hole (2b) and the groove (33a) to fix the threaded fitting (33) in the transmission rod (2).

8. An electrically powered handrail as claimed in claim 3, characterised in that: The inner end of the rotating drum (4) is provided with an avoiding groove (4b) along the axial direction, and when the second guide structure (41) is located in the inner end of the guide groove (1a), the anti-rotation pin (13) passes through the avoiding groove (4b).

9. An electrically powered handrail as claimed in claim 1, characterised in that: The transmission rod (2) is provided with two symmetrical first guide structures (21), and the rotating drum (4) is provided with two symmetrical spiral grooves (4a), and the two first guide structures (21) are respectively sleeved in the two spiral grooves (4a).

10. A car seat comprising a backrest (A), characterized in that: The backrest (A) is provided with the electric handrail of any one of claims 1-9 on the side, the side wall of the backrest (A) is provided with a receiving groove (B), the power assembly (3) drives the transmission rod (2) to slide inward, and the handrail body (6) can be accommodated in the receiving groove (B).

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