Electric armrest and automobile seat provided with same

Abstract

The electric armrest comprises a base assembly, a transmission rod, a rotary drum, a power assembly and an armrest body, the transmission rod is installed in a sliding mode relative to the base assembly in the axial direction, a first guide structure is arranged on the transmission rod, a spiral groove is formed in the side wall of the rotary drum, and the power assembly is arranged in the spiral groove. A spiral groove is formed in the base assembly, the first guide structure is slidably sleeved with the spiral groove, a second guide structure protruding outwards in the radial direction of the rotary drum is arranged on the side of the rotary drum, a guide groove is formed in the base assembly, the second guide structure is slidably sleeved with the guide groove, the end of the rotary drum is fixedly connected with an armrest body, and the armrest body can be driven by the power assembly to telescopically move or rotate. The automobile seat comprises a backrest, the electric armrest is installed on the side portion of the backrest, a containing groove is formed in the side wall of the backrest, and the armrest body can be contained in the containing groove. The automobile seat armrest has the beneficial effects that the armrest can swing at a large angle, the sweeping space is small, and the automobile seat armrest is compact in storage layout.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts, and in particular to an electric armrest and an automobile seat on which the electric armrest is installed. Background Art

[0002] There are two main types of traditional car seat armrests: one is located on the side of the seat back and can be manually rotated forward, and the other is fixed on both sides of the seat. These two traditional forms have single functions, are not convenient to use, and cannot meet the increasingly changing in-car application environment.

[0003] The above two armrest installation structures will occupy the side space of the backrest when the armrest is not in use. For this reason, hidden seat armrests have appeared on the market. For example, the patent document with announcement number CN114407744A discloses a telescopic rotation mechanism for an electric armrest, which is mainly composed of a geared cylindrical cam, a fixed sleeve, a pin A, a pin B, a rotating shaft, and a motor; the geared cylindrical cam cooperates with the fixed sleeve, and the fixed sleeve and the stepped hollow shaft together limit the other degrees of freedom of the geared cylindrical cam, and only retain the rotational degree of freedom of the geared cylindrical cam; the geared 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 and track groove B from right to left; pin B is fixed on the rotating shaft, and pin B moves relative to the track groove C on the geared cylindrical cam; pin A is fixed on the fixed sleeve, and pin A moves linearly relative to track groove A and rotates relative to track groove B.

[0004] The telescopic and rotating mechanism for the armrests described in the above patent document can hide the armrests in the side of the backrest, reducing the space occupied on both sides of the seat when folded. However, it still has the following shortcomings: the extension and rotation of the armrests are performed simultaneously, which is a compound movement. On the one hand, the armrests cannot rotate independently and cannot swing at a large angle. On the other hand, the extension and rotation are performed simultaneously, and the armrests swing over a larger space. After folding, there is still room for improvement in the compactness of the product. Summary of the invention

[0005] In view of this, the present invention provides an electric armrest, which can realize hidden folding of the armrest at the side of the backrest, and the extension and rotation of the armrest during the unfolding process are independent movements.

[0006] To achieve the above purpose, the technical solution of the present invention is as follows:

[0007] An electric armrest, comprising: a base assembly, which is used to be fixedly installed inside a backrest; a transmission rod, which is axially slidably installed relative to the base assembly, and the side wall of the outer end of the transmission rod is provided with a first guide structure protruding radially outward; a rotating cylinder, which is rotatably sleeved on the outer end of the transmission rod, and the side wall of the rotating cylinder is provided with a spiral groove, the first guide structure is slidably sleeved in the spiral groove, and the side of the rotating cylinder is provided with a second guide structure protruding radially outward; an armrest body, which is fixedly connected to the outer end of the rotating cylinder; a guide groove is provided on the base assembly, and the second guide structure is slidably sleeved in the guide groove, and the guide groove has a strip groove section parallel to the sliding direction of the transmission rod and an arc groove section vertically connected to the outer end of the strip groove section;

[0008] The base assembly is provided with a power assembly, which is used to drive the transmission rod to slide relative to the base assembly; during the sliding stroke of the transmission rod, when the second guide structure is located in the strip groove section, the rotating drum slides synchronously with the transmission rod to drive the armrest body to telescopically move along the width direction of the backrest; when the second guide structure is located in the arc groove section, under the guidance of the first guide structure and the spiral groove, the rotating drum can rotate relative to the transmission rod to drive the armrest body to rotate.

[0009] With the above structure, the armrest extension movement and rotation movement are performed independently, which can achieve large-angle swing, convenient use, and can meet the increasingly changing in-vehicle application environment. In addition, the armrest swing sweeps a small space, and the overall layout is simple and compact.

[0010] As a preference, the power assembly comprises a motor fixed on the base assembly, a screw driven by the motor and a threaded fitting that threads with the screw, the screw being rotatably arranged on the base assembly, the transmission rod being a hollow structure, and the threaded fitting being fixedly assembled inside the transmission rod. With the above structure, power is provided and the armrest moves smoothly.

[0011] As a preferred embodiment, the transmission rod is sleeved on the screw rod, an anti-rotation groove is provided on the side of the transmission rod, an anti-rotation pin is fixed on the base assembly, and the inner end of the anti-rotation pin is slidably matched with the anti-rotation groove. The above structure is simple and can limit the rotation of the transmission rod.

[0012] Preferably, the base assembly includes a support seat and a sleeve fixedly mounted on the support seat, the rotating cylinder is mounted in the sleeve, the anti-rotation pin is fixedly inserted in the side wall of the sleeve, and the guide groove is arranged on the side wall of the sleeve. The above structure provides support and is convenient for installation.

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

[0014] As a preference, the transition position between the strip-shaped groove section and the arc-shaped groove section is an arc-shaped structure. With the above structure, the armrest can move more smoothly.

[0015] Preferably, a pin hole is provided on the side wall of the transmission rod, a groove is provided on the threaded fitting at a position corresponding to the pin hole, and a pin is inserted into the pin hole and the groove to fix the threaded fitting inside the transmission rod. The above structure is simple and easy to install.

[0016] As a preference, the inner end of the rotating drum is provided with an avoidance groove along its axial direction, and when the second guide structure is located at the inner end of the guide groove, the anti-rotation pin passes through the avoidance groove. The above structure is compact and avoids the anti-rotation pin.

[0017] As a preferred embodiment, two first guide structures are symmetrically arranged on the transmission rod, two symmetrical spiral grooves are provided on the rotating drum, and the two first guide structures are respectively slidably sleeved in the two spiral grooves. The above structure is adopted for easy installation.

[0018] The utility model also provides a car seat, which aims to solve the problem that the space layout of the car seat armrests is not compact enough when they are folded.

[0019] To achieve the above purpose, the technical solution of the present invention is as follows:

[0020] A car seat comprises a backrest, the electric armrest is installed on the side of the backrest, the side wall of the backrest is provided with a storage groove, the power assembly drives the transmission rod to slide inwardly, so that the armrest body can be stored in the storage groove. With the above structure, the armrest can be hidden in the storage groove of the side wall of the backrest, and the structure layout is compact.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The side of the car seat is provided with a storage groove adapted to the shape of the armrest body, and the armrest body can be hidden in the storage groove, and the overall layout structure is simple and compact.

[0023] 2. The extension movement and rotation movement of the armrest body are carried out independently. It first extends outward and then rotates forward, which can achieve large-angle swing adjustment and a small swing sweep space. The movement is smooth and there is no jamming. It can meet the needs of multi-functional car seats and improve the comfort of seat use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a car seat;

[0025] Figure 2 It is a structural schematic diagram of an electric handrail;

[0026] Figure 3 An exploded view showing the internal structure of the electric handrail;

[0027] Figure 4 An exploded schematic diagram showing the connection between the transmission rod 2 and the threaded fitting 33;

[0028] Figure 5 A sectional view showing the installation relationship of the electric handrail;

[0029] Figure 6 It is a schematic diagram of the armrest body 6 extending outward;

[0030] Figure 7 is a schematic diagram of the rotation of the armrest body 6;

[0031] Figure 8 It is a schematic diagram of the armrest body 6 being installed on the car seat;

[0032] Fig. 9 This is a schematic diagram of the application of electric armrests in the one-touch bed-forming function of a car seat. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with embodiments and drawings.

[0034] like Figure 2 and Figure 3 As shown, an electric armrest includes a base assembly 1 and a transmission rod 2, wherein the base assembly 1 is used to be fixedly installed inside a seat back A, and the transmission rod 2 is arranged along the length direction of the seat back A, and is axially slidably installed relative to the base assembly 1. A rotating cylinder 4 is rotatably sleeved on the outer end of the transmission rod 2, and an armrest body 6 is fixedly connected to the outer end of the rotating cylinder 4. Two first guide structures 21 protruding radially outward are symmetrically provided on the side wall of the outer end of the transmission rod 2. Two symmetrical spiral grooves 4a are provided on the side wall of the rotating cylinder 4, and the two first guide structures 21 are slidably sleeved in the two spiral grooves 4a respectively. A second guide structure 41 protruding radially outward is provided on the side of the rotating cylinder 4. A guide groove 1a is provided on the base assembly 1, and the second guide structure 41 is slidably sleeved in the guide groove 1a.

[0035] like Figure 3 and Figure 5 As shown, the base assembly 1 includes a support seat 11 and a sleeve 12 fixedly mounted on the support seat 11, the rotating drum 4 is mounted in the sleeve 12, 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 is fixedly connected to the support seat 11. As shown in the figure, the guide groove 1a is provided on the side wall of the sleeve 12, and the guide groove 1a includes a strip groove section 1a1 parallel to the sliding direction of the transmission rod 2 and an arc groove section 1a2 vertically connected to the outer end of the strip groove section 1a1.

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

[0037] like Figure 4 and Figure 5 As shown, two symmetrical anti-rotation grooves 2a are provided on the side of the transmission rod 2 along the axial direction, and two anti-rotation pins 13 protruding inwardly are fixedly inserted 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 to limit the rotation of the transmission rod 2. The inner end of the rotating cylinder 4 is provided with an avoidance groove 4b along its axial direction, and the avoidance 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 avoidance groove 4b.

[0038] In this embodiment, the power assembly 3 drives the transmission rod 2 to slide relative to the base assembly 1. Figure 6 As shown, during the sliding stroke of the transmission rod 2, when the second guide structure 41 is located in the strip groove section 1a1, the rotating drum 4 slides synchronously with the transmission rod 2 to drive the armrest body 6 to move telescopically along the backrest width A direction. Figure 7 As shown, 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 armrest body 6 to rotate. In this process, since the transition position between the strip groove section 1a1 and the arc-shaped groove section 1a2 is an arc structure, the armrest body 6 moves smoothly and steadily without jamming, and the extension movement and the rotation movement are performed independently. The armrest body 6 can be swung and adjusted at a large angle and the swept space is small, meeting the use requirements of the multifunctional seat.

[0039] like Figure 1 and Figure 8 As shown, a car seat comprises a backrest A, the side of which is mounted with the electric armrest, and the side wall of the backrest A is provided with a strip storage groove B, the shape of which is adapted to the shape of the armrest, and the armrest body 6 can be completely stored in the storage groove B when not in use, with a compact layout; when in use, it can be smoothly and quickly unfolded. Fig. 9As shown, when the seat uses the one-touch bed-forming function, the power assembly 3 can drive the transmission rod 2 to slide inward, and the armrest body 6 first rotates upward and then moves inward to be hidden and stored in the storage slot B. After the seat back A is laid flat, the armrest body is unobstructed and can be used flexibly. It can cooperate with the various functions of the car seat to improve the comfort of the seat.

[0040] The working principle of the unfolding process of the armrest body 6 is as follows: 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. During the sliding process, the second guide structure 41 is first located in the strip groove section 1a1. Since the first guide structure 21 is restricted by the spiral groove 4a, the rotating drum 4 slides synchronously with the transmission rod 2, driving the armrest body 6 to extend outward along the backrest width A direction. When the second guide structure 41 moves to the end of the strip groove section 1a1, the armrest body 6 extends to the extreme position; then the second guide structure 41 transitions from the strip groove section 1a1 to the arc groove section 1a2, and the rotating drum 4 rotates relative to the transmission rod 2 under the guidance of the first guide structure 21 and the spiral groove 4a, driving the armrest body 6 to rotate. When the second guide structure 41 moves to the end of the arc groove section 1a2, the armrest body 6 rotates to the extreme position.

[0041] The working principle of the folding process of the armrest body 6 is as follows: the motor 31 drives the lead screw 32 to rotate in the opposite direction, the threaded fitting 33 is threadedly matched with the lead screw 32, the transmission rod 2 and the threaded fitting 33 move synchronously, and under the cooperation and restriction of the anti-rotation pin 13 and the anti-rotation groove 2a, the transmission rod 2 slides inward, and the rotating drum 4 rotates under the guidance of the first guide structure 21 and the spiral groove 4a, driving the armrest body 6 to rotate upward, and the second guide structure 41 moves along the arc groove segment 1a2 to the transition position between the arc groove segment 1a2 and the strip groove segment 1a1, and the armrest body 6 rotates from a horizontal state to a vertical state, and the transmission rod 2 continues to slide inward, and the first guide structure 21 slides to the end of the spiral groove 4a. The rotating drum 4 is restricted by the first guide structure 21 and moves inward synchronously with the transmission rod 2, and the second guide structure 41 moves along the strip groove segment 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 invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. An electric handrail, characterized in that: include: A base assembly (1) is used for being fixedly mounted inside a backrest (A); a transmission rod (2) is axially slidably mounted relative to the base assembly (1), and a first guide structure (21) protruding radially outward is provided on the outer end side wall of the transmission rod (2); a rotating cylinder (4) is rotatably sleeved on the outer end of the transmission rod (2), and a spiral groove (4a) is provided on the side wall of the rotating cylinder (4), and the first guide structure (21) is slidably sleeved in the spiral groove (4a), and a second guide structure (41) protruding radially outward is provided on the side of the rotating cylinder (4); An armrest body (6) 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 slidably sleeved in the guide groove (1a), and the guide groove (1a) comprises a strip groove section (1a1) parallel to the sliding direction of the transmission rod (2) and an arc groove section (1a2) vertically connected to the outer end of the strip 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); during the sliding stroke of the transmission rod (2), when the second guide structure (41) is located in the strip groove section (1a1), the rotating cylinder (4) slides synchronously with the transmission rod (2) to drive the armrest body (6) to move telescopically along the backrest width (A) direction; when the second guide structure (41) is located in the arc 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.

2. The electric handrail according to claim 1, characterized in that: The power assembly (3) comprises a motor (31) fixedly mounted on the base assembly (1), a screw rod (32) driven by the motor (31), and a threaded fitting (33) threadably mated with the screw rod (32); the screw rod (32) is rotatably mounted on the base assembly (1); the transmission rod (2) is a hollow structure; and the threaded fitting (33) is fixedly mounted inside the transmission rod (2).

3. The electric handrail according to claim 2, characterized in that: The transmission rod (2) is loosely sleeved on the screw rod (32), an anti-rotation groove (2a) is provided on the side of the transmission rod (2), an anti-rotation pin (13) is fixedly provided on the base assembly (1), and the inner end of the anti-rotation pin (13) is slidably matched with the anti-rotation groove (2a).

4. The electric handrail according to claim 3, characterized in that: 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 anti-rotation pin (13) is fixedly inserted into a side wall of the sleeve (12); and the guide groove (1a) is arranged on the side wall of the sleeve (12).

5. The electric handrail according to claim 4, characterized 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 is fixedly connected to the support seat (11).

6. The electric handrail according to claim 1, characterized in that: The transition position between the strip-shaped groove section (1a1) and the arc-shaped groove section (1a2) is an arc-shaped structure.

7. The electric handrail according to claim 2, characterized in that: A pin hole (2b) is provided on the side wall of the transmission rod (2), a groove (33a) is provided on the threaded fitting (33) at a position corresponding to the pin hole (2b), and a pin is inserted into the pin hole (2b) and the groove (33a) so that the threaded fitting (33) is fixed inside the transmission rod (2).

8. The electric handrail according to claim 3, characterized in that: The inner end of the rotating drum (4) is provided with an avoidance groove (4b) along its axial direction, and 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 avoidance groove (4b).

9. The electric handrail according to claim 1, characterized in that: The transmission rod (2) is symmetrically provided with two first guide structures (21), the rotating drum (4) is provided with two symmetrical spiral grooves (4a), and the two first guide structures (21) are respectively slidably mounted in the two spiral grooves (4a).

10. A car seat, comprising a backrest (A), characterized in that: The side of the backrest (A) is installed with an electric armrest according to any one of claims 1 to 9, and the side wall of the backrest (A) is provided with a storage groove (B). The power assembly (3) drives the transmission rod (2) to slide inward, so that the armrest body (6) can be stored in the storage groove (B).

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