Electric guide rail device, seat assembly, console box, and vehicle

Abstract

An electric guide rail device, a seat assembly, a console box, and a vehicle. The electric guide rail device comprises a sliding rail assembly (2), a driving portion (1), a belt transmission assembly (3) and a connector (4), wherein the sliding rail assembly (2) comprises a first sliding rail (21) arranged on a seat body (5) or a console box body and a second sliding rail (22) arranged on a vehicle body floor; the first sliding rail (21) is in sliding fit with the second sliding rail (22); the belt transmission assembly (3) comprises a driving wheel (31), a belt pulley (32) and a synchronous belt (33); at least part of the synchronous belt (33) is arranged in the second sliding rail (22), the synchronous belt (33) is wound around the driving wheel (31) and the belt pulley (32), the driving portion (1) is connected to the driving wheel (31) so as to drive the driving wheel (31) to rotate, and the synchronous belt (33) is connected to the first sliding rail (21); and the central axis of the driving wheel (31) and the central axis of the belt pulley (32) are both arranged in a vertical direction. In the device, the sliding of the first sliding rail (21) relative to the second sliding rail (22) is smoother, and enough foot space is reserved for rear passengers; and the arrangement and assembly of the belt transmission assembly (3) and the driving portion (1) are facilitated.

Description

Electric guide rail device, seat assembly, central armrest box and automobile Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to an electric guide rail device, a seat assembly, a central armrest box and a car. Background Art

[0002] Electric slide rail devices are usually used to realize movable devices in automobiles, such as devices that move automobile seats in the front and rear or left and right directions of the automobile relative to the automobile body floor; wherein, the electric slide rail device mainly includes an upper slide rail connected to the bottom of the seat body, a lower slide rail fixed on the automobile body floor, a drive motor and a transmission structure, and the transmission structure includes an internal threaded portion (or gear) provided on the upper slide rail, and a lead screw (or rack) provided on the lower slide rail, so as to utilize the rotation of the drive motor to realize the movement of the upper slide rail relative to the lower slide rail through the transmission of the internal threaded portion (or gear) and the lead screw (or rack).

[0003] However, due to the meshing connection between the various accessories of the metal components such as the gear rack provided on the upper and lower rails, noise is generated during the movement of the seat body relative to the vehicle body floor, and the sliding is not smooth due to assembly tolerance factors.

[0004] Summary of the Invention

[0005] The problem solved by the present invention is how to reduce the noise generated by a movable device in a car, such as a seat body, during movement relative to the vehicle body floor and the uneven sliding caused by assembly tolerance factors.

[0006] To solve the above-mentioned problem, the present invention provides an electric guide rail device, comprising a slide rail assembly, a drive unit, and a belt transmission assembly, wherein the slide rail assembly comprises a first slide rail provided on a seat body or an armrest box body and a second slide rail provided on a vehicle body floor, wherein the first slide rail and the second slide rail are slidably engaged with each other; the belt transmission assembly comprises a drive wheel, a pulley, and a synchronous belt, wherein at least a portion of the synchronous belt is provided in the second slide rail, the synchronous belt is wound around the drive wheel and the pulley, the drive unit is connected to the drive wheel for driving the drive wheel to rotate, and the synchronous belt is connected to the first slide rail;

[0007] The central axes of the driving wheel and the pulley are both arranged in the vertical direction.

[0008] Optionally, the second slide rail includes a slide rail body and a pulley fixing member, the pulley fixing member is arranged on a side of the slide rail body, and at least a portion of the belt transmission assembly is arranged on the pulley fixing member.

[0009] Optionally, the pulley fixing member includes a pulley mounting seat and a protective cover, the pulley mounting seat is arranged at the end of the protective cover along the extension direction of the second slide rail, the pulley is installed on the pulley mounting seat, and the driving wheel and the pulley are arranged on the protective cover.

[0010] Optionally, the second slide rail includes at least two slide rail bodies, at least two slide rail bodies are arranged at intervals along an extension direction perpendicular to the second slide rail body, the number of the driving part and the synchronous belt is one, the pulley fixing member has a cavity, and at least part of the synchronous belt, the driving part and the driving wheel are arranged in the cavity.

[0011] Optionally, the synchronous belt is passed through one of the slide rail bodies, and there are two pulleys, which are respectively arranged at both ends of the second slide rail.

[0012] Optionally, the belt drive assembly further includes a tensioning wheel, the two tensioning wheels are respectively arranged at both ends of the second slide rail, the two pulleys are respectively arranged at both ends of the second slide rail, and the tensioning wheel is arranged on one side of the pulley.

[0013] Optionally, a portion of the synchronous belt is passed through the slide rail body, and another portion of the synchronous belt is passed through the pulley fixing member; or, at least a portion of the synchronous belt is arranged in the pulley fixing member.

[0014] Optionally, the pulley and the driving wheel are respectively arranged at both ends of the second slide rail, part of the synchronous belt is passed through the slide rail body, and the synchronous belt is sleeved on the driving wheel and the pulley.

[0015] Optionally, the belt drive assembly further includes a tensioning pulley and a pressure pulley, the two pulleys are respectively arranged at one end of the two second slide rails, and the multiple tensioning pulleys are respectively arranged at the other end of the two second slide rails, the pressure pulley and the drive wheel are respectively arranged tightly against the outer wall and inner wall of the synchronous belt, for pressing the synchronous belt onto the drive wheel, the synchronous belt is wound around the pulley, the tensioning pulley and the drive wheel, and different parts of the synchronous belt are passed through the two slide rail bodies.

[0016] Optionally, the electric guide rail device includes two of the belt drive assemblies, the second slide rail includes at least two of the slide rail bodies, at least two of the slide rail bodies are spaced apart along an extension direction perpendicular to themselves, and the synchronous belts of the two belt drive assemblies are respectively passed through the two slide rail bodies.

[0017] Optionally, the electric guide rail device includes two of the driving parts, each of the driving parts is connected to the driving wheel in each of the belt transmission assemblies, and the belt transmission assembly also includes a plurality of pressure wheels, a part of the pressure wheels are arranged around the circumference of one of the driving wheels, and another part of the pressure wheels are arranged around the circumference of another driving wheel.

[0018] Optionally, the electric guide rail device includes a driving part, the synchronous belt of the belt transmission assembly is passed through the corresponding second slide rail, the driving part is connected to the driving wheel in one of the belt transmission assemblies, and one of the belt transmission assemblies is connected to the other belt transmission assembly for driving the other belt transmission assembly to operate.

[0019] Optionally, the driving wheel includes a belt mounting portion and a tooth portion connected in sequence along its axial direction, the synchronous belt is sleeved on the belt mounting portion, and the tooth portion in one belt transmission component is meshed and connected with the tooth portion in another belt transmission component.

[0020] Optionally, the belt drive assembly further includes a pressure wheel and a transmission gear, the drive wheel includes a belt mounting portion and a tooth portion connected in sequence along its axial direction, the synchronous belt is wound around the pulley, the belt mounting portion of the drive wheel and the pressure wheel, and the tooth portion in one belt drive assembly is meshed and connected with the tooth portion in another belt drive assembly through the transmission gear.

[0021] Optionally, one of the belt transmission assemblies further includes a transmission belt, a first drive wheel and a second drive wheel, and the other belt transmission assembly further includes a third drive wheel, the driving portion is connected to the second drive wheel, the second drive wheel is meshedly connected to the first drive wheel, the second drive wheel is transmission-connected to the third drive wheel via the transmission belt, and the first drive wheel and the third drive wheel are respectively connected to the synchronous belts of the two belt transmission assemblies.

[0022] Optionally, the inner wall and outer wall of the synchronous belt have internal teeth and external teeth respectively, the internal teeth of the synchronous belt are sleeved on the pulley and the driving wheel, the synchronous belts in the two belt transmission assemblies are meshed and connected through the external teeth, and the driving wheels in the two belt transmission assemblies are arranged relative to each other for tightening the meshing of the two synchronous belts.

[0023] Optionally, the belt transmission assembly includes a pressure wheel and a driving wheel, the driving wheel includes two belt mounting parts connected in sequence along its axial direction, the synchronous belts of the two belt transmission assemblies are respectively mounted on the two belt mounting parts and the pulleys, the pressure wheel and the driving wheel are respectively connected to the outer wall and inner wall of the synchronous belt, and are used to press each synchronous belt on each belt mounting part.

[0024] Optionally, the belt transmission assembly includes a first pressure wheel, a second pressure wheel and a third pressure wheel, the synchronous belt has internal teeth and external teeth, the internal teeth of one synchronous belt are sleeved on one pulley and the first pressure wheel, the internal teeth of another synchronous belt are sleeved on the other pulley, the second pressure wheel and the driving wheel, the third pressure wheel is arranged on one side of the driving wheel and connected to the external teeth of the other synchronous belt, and is used to press the other synchronous belt onto the driving wheel, and the two synchronous belts are meshed and connected via the external teeth;

[0025] The first pressing wheel and the second pressing wheel are arranged between the slide rail bodies of the two second slide rails, and the first pressing wheel is arranged on one side of the second pressing wheel for pressing the meshing part of the two synchronous belts.

[0026] Optionally, the belt drive assembly further includes an elastic tensioner, which is disposed below the pulley fixing member and on one side of the pulley. The elastic tensioner is connected to one of the pulleys and is used to adjust the position of the pulley during the assembly stage so that the tension of the two synchronous belts is consistent.

[0027] Optionally, the first slide rail includes at least two slide rail members, at least two of the slide rail members are arranged at intervals along an extension direction perpendicular to the first slide rail member, the slide rail member includes a moving member and a first guide rail portion, the first guide rail portion is arranged on a side perpendicular to the extension direction of the first slide rail, two groups of the moving members are arranged at intervals along the extension direction perpendicular to the first slide rail, and the two groups of the moving members are respectively connected to the first guide rail portion, the slide rail body includes a second guide rail portion, the first guide rail portion is embedded in the second guide rail portion, each two groups of the moving members are respectively located in the second guide rail portion, and are used to move relative to the second guide rail portion; and the synchronous belt is located between the moving member and the second guide rail portion.

[0028] Optionally, the slide rail body further includes a support portion, which is disposed between the two second guide rail portions, and a top surface of the support portion is lower than a bottom surface of the second guide rail portion.

[0029] Optionally, the electric guide rail device also includes a connecting member, which includes a first connecting seat and a second connecting seat, the first connecting seat is connected to the first guide rail portion of the first slide rail, the first connecting seat is connected to the second connecting seat, and the first connecting seat and / or the second connecting seat are provided with an installation groove, and part of the synchronous belt is passed through the installation groove, and the first connecting seat is connected to the second connecting seat.

[0030] Compared with the prior art, when the first slide rail in the present invention slides relative to the second slide rail, the driving part can work to drive the driving wheel to rotate, and the driving wheel and the pulley are connected by a synchronous belt, so that the rotation of the driving wheel drives the synchronous belt transmission, and the synchronous belt is connected to the first slide rail, so that the synchronous belt drives the first slide rail to slide relative to the second slide rail, thereby realizing the movement of movable devices in the car, such as seat bodies or armrest box bodies, relative to the car body floor, for example, front and back or left and right movement.

[0031] Because the synchronous belt in the belt drive assembly is wound around the drive wheel and the pulley, the drive wheel and the pulley are softly connected via the synchronous belt. This not only reduces noise from the seat body moving relative to the vehicle floor, but also transmits the driving force of the drive wheel to the pulley and the first slide rail via the synchronous belt, reducing assembly tolerances and making the sliding movement of the first slide rail relative to the second slide rail smoother. By positioning at least a portion of the synchronous belt within the second slide rail, not only is dirt from the vehicle interior prevented from entering other components of the belt drive assembly through the synchronous belt, thereby reducing the possibility of transmission failure of the belt drive assembly, but it also does not affect the assembly of the second slide rail to the vehicle floor, or the first slide rail to the seat body.

[0032] Since the area of ​​the upper slide rail and the seat body or armrest box body is the foot space for the rear passengers, the available space of the seat body is very limited. In the related art, the drive motor and the transmission structure are usually arranged below the seat body, thereby reducing the foot space for the rear passengers in the seat body; in the present invention, the central axes of the drive wheel and the pulley are both arranged in the vertical direction, so that the synchronous belt extends and reciprocates in the horizontal plane, and at least part of the synchronous belt is arranged in the second slide rail. Therefore, the driving part and the entire belt transmission assembly (including the drive wheel, pulley and synchronous belt) are basically in an area below the horizontal height in the second slide rail. Accordingly, the driving part for driving the belt transmission assembly is also in a lower position, so that it not only does not occupy the area space below the seat body or the armrest box body to reserve sufficient foot space for the rear passengers, but also facilitates the layout and assembly of the belt transmission assembly and the drive part.

[0033] Another embodiment of the present invention provides a seat assembly, including the electric guide rail device as described above, and also including a seat body, which is connected to the first slide rail of the electric guide rail device; the extension direction of the first slide rail and the second slide rail is parallel to the movement direction of the seat body.

[0034] Therefore, since the seat assembly includes the electric guide rail device, the seat assembly at least has all the technical effects of the electric guide rail device, which will not be described in detail here.

[0035] Another embodiment of the present invention provides a central armrest box, including the electric guide rail device as described above, and also including an armrest box body, wherein the armrest box body is connected to the first slide rail of the electric guide rail device; the extension direction of the first slide rail and the second slide rail is parallel to the movement direction of the armrest box body.

[0036] Therefore, since the central armrest box includes the electric guide rail device, the central armrest box at least has all the technical effects of the electric guide rail device, which will not be repeated here.

[0037] Another embodiment of the present invention provides an automobile, comprising the seat assembly as described above, or the center armrest box as described above, or the electric guide rail device as described above.

[0038] Therefore, since the car includes a seat assembly, or a central armrest box, or an electric guide rail device, the car at least has all the technical effects of the seat assembly, or the central armrest box, or the electric guide rail device, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] FIG1 is a schematic diagram of the shaft side structure of an electric guide rail device according to an embodiment of the present invention;

[0040] FIG2 is a schematic diagram of an exploded structure of an electric guide rail device according to an embodiment of the present invention;

[0041] FIG3 is a schematic structural diagram of an electric guide rail device with a single synchronous belt according to an embodiment of the present invention;

[0042] FIG4 is a structural diagram of a second embodiment of an electric guide rail device with a single synchronous belt according to the present invention;

[0043] FIG5 is a schematic structural diagram of a third embodiment of an electric guide rail device with a single synchronous belt according to the present invention;

[0044] FIG6 is a schematic structural diagram of a fourth embodiment of an electric guide rail device with a single synchronous belt according to the present invention;

[0045] FIG7 is a schematic structural diagram of a fifth embodiment of an electric guide rail device with a single synchronous belt according to the present invention;

[0046] FIG8 is a sixth structural diagram of an electric guide rail device with a single synchronous belt according to the present invention;

[0047] FIG9 is a schematic structural diagram of an electric guide rail device with two synchronous belts according to an embodiment of the present invention;

[0048] FIG10 is a schematic structural diagram of a second embodiment of an electric guide rail device with two synchronous belts according to the present invention;

[0049] FIG11 is a schematic structural diagram of a third embodiment of an electric guide rail device with two synchronous belts according to the present invention;

[0050] FIG12 is a schematic structural diagram of a fourth embodiment of an electric guide rail device with two synchronous belts according to the present invention;

[0051] FIG13 is a schematic structural diagram of a fifth embodiment of an electric guide rail device with two synchronous belts according to the present invention;

[0052] FIG14 is a schematic structural diagram of a sixth embodiment of an electric guide rail device with two synchronous belts according to the present invention;

[0053] FIG15 is a schematic structural diagram of a seventh embodiment of an electric guide rail device having two synchronous belts according to the present invention;

[0054] FIG16 is a schematic structural diagram of an electric guide rail device with two synchronous belts according to an eighth embodiment of the present invention;

[0055] FIG17 is a schematic structural diagram of a belt drive assembly according to an embodiment of the present invention;

[0056] FIG18 is a schematic structural diagram of a belt drive assembly according to a second embodiment of the present invention;

[0057] FIG19 is a schematic structural diagram of a seat assembly according to an embodiment of the present invention;

[0058] FIG20 is a second schematic diagram of the exploded structure of the electric guide rail device according to an embodiment of the present invention;

[0059] FIG21 is an enlarged structural diagram of point A in FIG20;

[0060] FIG22 is a schematic diagram of the structure of the first slide rail and the connecting member in an embodiment of the present invention.

[0061] Description of reference numerals: 1-driving part; 2-slide rail assembly; 21-first slide rail; 211-first guide rail part; 212-moving member; 22-Second slide rail; 221-Slide rail body; 2211-Second guide rail portion; 2212-Support portion; 222-Pulley fixing member; 2221-Pulley mounting seat; 2222-Protective cover; 3-Belt transmission assembly; 31-Drive wheel; 311-First drive wheel; 312-Second drive wheel; 313-Third drive wheel; 314-Fourth drive wheel; 315-Fifth drive wheel; 316-Sixth drive wheel; 32-Pulley; 33-Timing belt; 34-Tensioning wheel; 35-Pressure wheel; 351-First pressure wheel; 352-Second pressure wheel; 353-Third pressure wheel; 36-Transmission gear; 37-Transmission belt; 38-Elastic tensioner; 4-Connecting member; 41-First connecting seat; 42-Second connecting seat; 5-Seat body. DETAILED DESCRIPTION

[0062] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0063] It should be noted that in the coordinate system XYZ provided herein, the positive direction of the X axis represents the rear, the negative direction of the X axis represents the front, the positive direction of the Y axis represents the right, the negative direction of the Y axis represents the left, the positive direction of the Z axis represents the top, and the negative direction of the Z axis represents the bottom. At the same time, it should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0064] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical connections; direct connections or indirect connections via an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0065] Throughout this specification, references to terms such as "an embodiment," "one embodiment," and "an implementation" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or implementation are included in at least one embodiment or implementation of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or implementations.

[0066] To solve the above technical problems, in conjunction with FIG1 , an embodiment of the present invention provides an electric guide rail device, comprising a slide rail assembly 2, a drive unit 1, and a belt transmission assembly 3, wherein the slide rail assembly 2 comprises a first slide rail 21 provided on a seat body 5 and a second slide rail 22 provided on a vehicle body floor, wherein the first slide rail 21 and the second slide rail 22 are slidably engaged with each other; the belt transmission assembly 3 comprises a driving wheel 31, a pulley 32, and a synchronous belt 33, wherein at least a portion of the synchronous belt 33 is provided on the second slide rail 22, and the synchronous belt 33 is wound around the driving wheel 31 and the pulley 32, the driving unit 1 is connected to the driving wheel 31 for driving the driving wheel 31 to rotate, and the synchronous belt 33 is connected to the first slide rail 21;

[0067] The central axes of the driving wheel 31 and the pulley 32 are both arranged in the vertical direction.

[0068] It should be noted that the first slide rail 21 can be set at the bottom of the seat body 5, and the second slide rail 22 can be assembled on the vehicle body floor; specifically, the synchronous belt 33 is arranged around the drive wheel 31 and the pulley 32. When the central axes of the drive wheel 31 and the pulley 32 are both arranged in the vertical direction, the synchronous belt 33, the drive wheel 31 and the pulley 32 can be regarded as being in the same horizontal plane, and the synchronous belt extends in the horizontal plane to form a closed loop, and moves back and forth under the drive of the drive wheel 31.

[0069] At least a portion of the timing belt 33 is disposed within the second slide rail 22, allowing the drive wheel 31, pulley 32, and drive unit 1 connected to the timing belt 33 to be located inside or outside the second slide rail 22. This not only eliminates the need for occupying the area of ​​the seat body 5, but also allows for sufficient foot space to be reserved for rear passengers. The vertical direction refers to the direction of the Z-axis of the coordinate system in FIG1 .

[0070] When the first slide rail 21 in the present invention slides relative to the second slide rail 22, the driving part 1 can be operated to drive the driving wheel 31 to rotate, and the driving wheel 31 and the pulley 32 are connected by a synchronous belt 33, so that the rotation of the driving wheel 31 drives the synchronous belt 33 to transmit, and the synchronous belt 33 is connected to the first slide rail 21, so that the synchronous belt 33 drives the first slide rail 21 to slide relative to the second slide rail 22, so as to realize the movement of movable devices in the car, such as the seat body 5 or the armrest box body, relative to the car body floor, for example, forward and backward or left and right movement.

[0071] Because the synchronous belt 33 in the belt drive assembly 3 is wound around the drive wheel 31 and the pulley 32, the drive wheel 31 and the pulley 32 are softly connected via the synchronous belt 33. This not only reduces the noise of the seat body 5 moving relative to the vehicle floor, but also transmits the driving force of the drive wheel 31 to the pulley 32 and the first slide rail 21 via the synchronous belt 33, reducing assembly tolerances and ensuring smoother sliding of the first slide rail 21 relative to the second slide rail 22. By positioning at least a portion of the synchronous belt 33 within the second slide rail 22, not only is dirt from the vehicle interior prevented from entering other components of the belt drive assembly 3 through the synchronous belt 33, thereby reducing the possibility of transmission failure of the belt drive assembly 3, but it also does not affect the assembly of the second slide rail 22 to the vehicle floor, and the first slide rail 21 to the seat body 5.

[0072] Since the area of ​​the upper slide rail and the seat body 5 or the armrest box body is the foot space for the rear passengers, the available space of the seat body 5 is very limited. In the related art, the drive motor and the transmission structure are usually arranged below the seat body 5, thereby reducing the foot space for the rear passengers in the seat body 5; in the present invention, the central axes of the drive wheel 31 and the pulley 32 are both arranged in the vertical direction, so that the synchronous belt extends and reciprocates in the horizontal plane, and at least part of the synchronous belt 33 is arranged in the second slide rail 22. Therefore, the entire belt drive assembly 3 (including the drive wheel 31, the pulley 32 and the synchronous belt) is basically in an area below the horizontal height of the second slide rail 22. Accordingly, the drive part for driving the belt drive assembly 3 is also in a lower position, so that it not only does not occupy the area space below the seat body 5 or the armrest box body, so as to reserve sufficient foot space for the rear passengers, but also facilitates the arrangement and assembly of the belt drive assembly 3 and the drive part 1.

[0073] In one embodiment of the present invention, as shown in Figures 1 and 2, the second slide rail 22 includes a slide rail body 221 and a pulley fixing member 222, the pulley fixing member 222 is arranged on the side of the slide rail body 221, and at least a portion of the belt drive assembly 3 is arranged on the pulley fixing member 222.

[0074] It should be noted that the extension direction of the slide rail body 221 of the second slide rail 22 is consistent with the X-axis direction in the coordinate system of Figure 1, which is also the length direction of the slide rail body 221, and the extension direction perpendicular to the slide rail body 221 is consistent with the Y-axis direction in the coordinate system of Figure 1, which is also the width direction of the slide rail body 221.

[0075] The upper slide rail and the seat body 5 or the armrest box body area are the foot space for the rear passengers. In the related art, the drive motor and the transmission structure are usually arranged under the seat body 5, thereby reducing the foot space for the rear passengers in the seat body 5. However, the surrounding area of ​​the lower slide rail is usually foam or carpet, etc.; therefore, in this embodiment, the pulley fixing member 222 is connected to the slide rail body 221, wherein the pulley fixing member 222 can be arranged on the side of the slide rail body 221 in the width direction, thereby increasing the width area of ​​the entire second slide rail 22, so that at least part of the structure of the belt drive assembly 3 is installed on the pulley fixing member 222, so as to fully utilize the internal area space of the second slide rail 22. In other words, not only does it not occupy the space in the seat body 5 or the armrest box body area, but it also reserves more foot space for the rear passengers in the seat body 5 or the armrest box body, thereby improving the user experience; the drive unit 1 can also be installed in the internal space of the second slide rail 22, and the internal space of the second slide rail 22 can facilitate the assembly operation of the drive unit 1 and the entire belt drive assembly 3.

[0076] The driving wheel 31 and the pulley 32 can be arranged in the lower area of ​​the pulley fixing member 222. In other words, the pulley fixing member 222 not only provides an installation space for the installation of the driving wheel 31 and the pulley 32 to provide safety protection for the driving wheel 31 and the pulley 32, but also reduces the amount of external debris entering the driving wheel 31 and the pulley 32, so as to avoid external debris affecting the normal transmission operation of the belt transmission assembly 3 and causing structural failure.

[0077] The pulley fixing member 222 is arranged on the side of the slide rail body 221, which means that the pulley fixing member 222 can be arranged on one side of the slide rail body 221, or arranged around the outer side of the slide rail body 221, and the pulley fixing member 222 and the slide rail body 221 can have a direct connection relationship, or there is no direct connection.

[0078] In addition, in the related art, the synchronous belt 33 is a structure with ends. Since the main body of the synchronous belt is composed of materials such as rubber that are easily softened at high temperatures, it is difficult to clamp the synchronous belt at high temperatures, which may cause it to loosen at the end belt during transmission. The synchronous belt 33 in this embodiment is a closed structure. The reliability of the synchronous belt 33 with a closed structure is higher than that of the synchronous belt 33 with ends, thereby improving the reliability of the synchronous belt, especially at high temperatures.

[0079] In one embodiment of the present invention, as shown in Figure 2, the pulley fixing member 222 includes a pulley mounting seat 2221 and a protective cover 2222, the pulley mounting seat 2221 is arranged at the end of the protective cover 2222 along the extension direction of the second slide rail 22, the pulley 32 is installed on the pulley mounting seat 2221, and the driving wheel 31 and the pulley 32 are arranged on the protective cover 2222.

[0080] It should be noted that the pulley mounting seat 2221 is disposed at the end of the protective cover 2222 along the extension direction (length direction) of the second slide rail 22. There is at least one pulley mounting seat 2221, which is used to mount components of the belt drive assembly 3, such as the pulley 32 and the tensioner. The pulleys 32 are mounted at both ends of the pulley fixing member 222 in the extension direction and are located on both sides of the extension direction of the slide rail body 221. In other words, in this embodiment, the pulleys 32 can be directly mounted on the pulley mounting seat 2221, rather than being mounted inside or at the end of the slide rail body 221. Thus, they do not occupy the internal space of the slide rail body 221, which is equivalent to increasing the travel of the first slide rail 21 relative to the second slide rail 22, thereby increasing the front-to-back or left-to-right adjustment travel of the seat body 5 relative to the vehicle body floor, thereby adapting to the needs of customers of different body shapes. The drive wheel 31 and the pulley 32 are disposed at the bottom of the protective cover 2222, thereby providing shielding and protection for the drive wheel 31 and the pulley 32.

[0081] Specifically, at least one pulley 32 can be mounted on a pulley mounting seat 2221. The number of pulleys 32 mounted on the pulley mounting seat 2221 can be flexibly set according to factors such as different vehicle models and different customers, and is not specifically limited here. The protective cover 2222 can be a plate-like structure (flat plate, curved plate, etc.), in which case the drive unit 1 and the belt transmission assembly 3 can be disposed in the lower area or upper area of ​​the plate-like structure. It can also be a shell structure, in which case the drive unit 1 and the belt transmission assembly 3 can be disposed in the interior space of the shell structure. Therefore, the structure or shape of the protective cover 2222 is not specifically limited here.

[0082] In one embodiment of the present invention, in combination with Figures 3 to 8, the second slide rail 22 includes at least two slide rail bodies 221, and at least two slide rail bodies 221 are arranged at intervals along an extension direction perpendicular to themselves. The number of the driving part 1 and the synchronous belt 33 is one each, and the pulley fixing member 222 has a cavity, and at least part of the synchronous belt 33, the driving part 1 and the driving wheel 31 are arranged in the cavity.

[0083] It should be noted that the number of the slide rail bodies 221 is at least two. At this time, the number of the first slide rails 21 corresponding to the slide rail bodies 221 is also at least two, and the number of the slide rail bodies 221 matches that of the first slide rails 21 .

[0084] The pulley fixing member 222, such as a protective cover 2222, has a cavity, so at least a portion of the synchronous belt 33, the drive unit 1, and the drive pulley 31 are all installed in the cavity, thereby shielding and protecting the belt transmission assembly 3 via the pulley fixing member 222. In this embodiment, since there is only one drive unit 1 and one synchronous belt 33, that is, one drive unit 1 is used to drive the drive pulley 31 to rotate, and the synchronous belt 33 drives the multiple pulleys 32 to rotate. The synchronous belt 33 is connected to the first slide rail 21 to drive the first slide rail 21 to move relative to the second slide rail 22. In other words, the seat body 5 or the armrest box body can be moved left and right or forward and backward relative to the vehicle body floor through a single drive unit 1, thereby effectively reducing the cost of the drive unit 1 and the entire belt transmission assembly 3; wherein, the drive unit 1 can be a rotary motor.

[0085] Among them, the X-axis and Y-axis of the coordinate system in Figures 3 to 8 are used to indicate that in one embodiment, the two slide rail bodies 221 can be arranged at intervals along the Y-axis direction, and the extension direction of each second slide rail 22 can be parallel to the X-axis direction. The seat body 5 can move forward and backward relative to the vehicle body floor, but it is not limited to this arrangement of the two slide rail bodies 221. For example, the two slide rail bodies 221 can also be arranged at intervals along the X-axis direction so that the seat body 5 can move left and right relative to the vehicle body floor.

[0086] In one embodiment of the present invention, as shown in FIG. 3 , the synchronous belt 33 is passed through one of the slide rail bodies 221 , and there are two pulleys 32 , which are respectively disposed at both ends of the second slide rail 22 .

[0087] It should be noted that the two pulleys 32 can be respectively arranged at the two ends of the slide rail body 221, or can be arranged in the two pulley mounting seats 2221, and the synchronous belt 33 is passed through the slide rail body 221 and wound around the driving wheel 31, the pressure wheel 35 and the two pulleys 32, wherein the driving part 1 is connected to the driving wheel 31 to drive the driving wheel 31 to rotate, and the rotation of the driving wheel 31 drives the synchronous belt 33 to transmit on the pulley 32, so as to drive the first slide rail 21 to move linearly relative to the second slide rail 22, so as to realize the position adjustment of the seat body 5 relative to the vehicle body floor.

[0088] In Figure 3, the belt drive assembly 3 also includes a plurality of pressure wheels 35, which are arranged around the circumference of the drive wheel 31, and the pressure wheels 35 and the drive wheel 31 are respectively in contact with the outer wall and the inner wall of the synchronous belt 33, so as to press the synchronous belt 33 against the drive wheel 31, thereby preventing the synchronous belt 33 from detaching from the drive wheel 31 during the transmission process, so as to improve the stability of the transmission of the synchronous belt 33 on the drive wheel 31 and the pulley 32.

[0089] In one embodiment of the present invention, in combination with Figures 4 and 5, the belt transmission assembly 3 also includes a tensioning pulley 34, the two tensioning pulleys 34 are respectively arranged at both ends of the second slide rail, the two pulleys 32 are respectively arranged at both ends of the second slide rail 22, and the tensioning pulley 34 is arranged on one side of the pulley 32.

[0090] It should be noted that the two pulleys 32 are respectively arranged at the two ends of the second slide rail 22, so that the two pulleys 32 provide support for the installation and transmission of the synchronous belt 33, and the two tensioning pulleys 34 are respectively arranged at the two ends of the second slide rail 22, and the tensioning pulley 34 is on one side of the pulley 32, so that the tension of the synchronous belt 33 can be adjusted through the two tensioning pulleys 34, so that during the assembly stage, the consistency of the tension of the synchronous belts corresponding to the two second slide rails 22 can be ensured, so as to ensure the synchronization and smoothness of the sliding of the first slide rail 21 relative to the second slide rail 22.

[0091] Specifically, the tensioning wheel 34 can be a wheel body with external teeth on its circumferential outer wall and used to tension the synchronous belt 33. The pulley can be a wheel body with a smooth circumferential outer wall or a wheel body with external teeth on its circumferential outer wall.

[0092] In one embodiment of the present invention, as shown in Figures 4 and 6, a portion of the synchronous belt 33 is passed through the slide rail body 221, and another portion of the synchronous belt 33 is passed through the pulley fixing member 222; or, at least a portion of the synchronous belt 33 is arranged in the pulley fixing member 222.

[0093] It should be noted that in FIG4 , two pulleys 32 are mounted on opposite sides of the rail body 221 and are respectively mounted in the pulley mounting seats 2221 of the pulley fixing member 222. At this time, a portion of the synchronous belt 33 is passed through the rail body 221, and another portion of the synchronous belt 33 is located outside the rail body 221 but inside the pulley fixing member 222. Thus, the rail body 221 and the pulley fixing member 222 jointly shield and protect the synchronous belt 33 and the pulley 32. The synchronous belt 33 can pass through the center position of the rail body 221 or from one side of the center position inside the rail body 221, and no specific limitation is given here.

[0094] As shown in Figure 7, the number of slide rail bodies 221 in the second slide rail 22 can be multiple, and the synchronous belt 33 is passed through one of the slide rail bodies 221; for example, the number of slide rail bodies 221 in Figure 3 is three, so that the synchronization of the sliding of the first slide rail 21 relative to the second slide rail 22 can be achieved through one synchronous belt 33.

[0095] In Figure 6, the pulleys 32 and the tensioning pulleys 34 provided on both sides of the second slide rail 22 are installed in the corresponding pulley mounting seats 2221, and the synchronous belt 33 can pass through the inside of the protective cover 2222 of the pulley fixing member 222. In other words, the synchronous belt 33 does not pass directly through the inside of the slide rail body 221, so that the synchronous belt 33 can also drive the first slide rail 21 to move relative to the second slide rail 22.

[0096] In one embodiment of the present invention, as shown in Figure 5, the pulley 32 and the drive wheel 31 are respectively arranged at both ends of the second slide rail 22, part of the synchronous belt 33 is passed through the slide rail body 221, and the synchronous belt 33 is sleeved on the drive wheel 31 and the pulley 32.

[0097] It should be noted that by arranging the pulley 32 and the drive wheel 31 at the opposite ends of the second slide rail 22 respectively, the drive wheel 31 not only serves as the pulley 32 to support the synchronous belt 33, but is also used to drive the synchronous belt 33 under the driving action of the drive unit 1, thereby reducing the number of pulleys 32 and correspondingly reducing the assembly difficulty and failure probability of the belt drive assembly 3.

[0098] In one embodiment of the present invention, in combination with Figure 8, the belt transmission assembly 3 also includes a tensioning wheel 34 and a pressure wheel 35. The two pulleys 32 are respectively arranged at one end of the two second slide rails 22, and the multiple tensioning wheels 34 are respectively arranged at the other end of the two second slide rails 22. The pressure wheel 35 and the driving wheel 31 are respectively arranged in close contact with the outer wall and inner wall of the synchronous belt 33, so as to press the synchronous belt 33 onto the driving wheel 31. The synchronous belt 33 is wound around the pulley 32, the tensioning wheel 34 and the driving wheel 31, and different parts of the synchronous belt 33 are passed through the two slide rail bodies 221.

[0099] It should be noted that the two pulleys 32 can be arranged at one end of the two slide rail bodies 221, such as the rear end, and multiple tensioning pulleys 34 are respectively installed at the other end of the two second slide rails 22, such as the front end. At this time, the tensioning pulley 34 not only plays a supporting role for the pulley 32 to the synchronous belt 33, but also can tension the synchronous belt 33; the pressure wheel 35 is used to press the synchronous belt 33 onto the drive wheel 31 to prevent the synchronous belt 33 from detaching from the drive wheel 31.

[0100] In this embodiment, the number of synchronous belts 33 is one, and one synchronous belt 33 is passed through the two slide rail bodies 221 and is wound around each pulley 32, the tensioning pulley 34 and the driving pulley 31. The driving part 1 works to drive the driving pulley 31 to rotate, and the driving pulley 31 transmits the synchronous belt 33. Since the connecting member 4 is used to connect the synchronous belt 33 and the first slide rail 21, the synchronous belt 33 passing through the two second slide rails 22 at the same time can be connected to the two first slide rails 21 respectively through the two connecting members 4. Therefore, the transmission of one synchronous belt 33 not only enables the first slide rail 21 to move relative to the second slide rail 22, so that the position of the seat body 5 relative to the vehicle body floor can be adjusted, such as forward and backward or left and right movement, but also because different parts of the synchronous belt 33 have the same moving direction and speed when passing through the two second slide rails 22, the synchronization of the movement of the two first slide rails 21 relative to the second slide rail 22 is ensured, so that the position adjustment action of the seat body 5 is smoother.

[0101] In one embodiment of the present invention, as shown in Figures 9 to 16, the electric guide rail device includes two of the belt drive assemblies 3, the second slide rail 22 includes at least two of the slide rail bodies 221, and at least two of the slide rail bodies 221 are spaced apart along an extension direction perpendicular to themselves, and the synchronous belts 33 of the two belt drive assemblies 3 are respectively passed through the two slide rail bodies 221.

[0102] It should be noted that the number of the slide rail bodies 221 is at least two, and there can be two belt drive assemblies 3. The synchronous belt 33 is passed through the corresponding second slide rail 22, so that the driving wheel 31 is driven to rotate by the driving part 1, and the driving wheel 31 drives the two synchronous belts 33 to transmit at the same time, so that the two first slide rails 21 move synchronously relative to the two slide rail bodies 221, which not only realizes the position adjustment of the seat body 5 relative to the vehicle body floor, such as front and back or left and right movement, but also makes the position adjustment action of the seat body 5 smoother.

[0103] In one embodiment of the present invention, as shown in Figure 9, the electric guide rail device includes two driving parts 1, each of the driving parts 1 is connected to the driving wheel 31 in each belt transmission assembly 3, and the belt transmission assembly 3 also includes a plurality of pressure wheels 35, a part of the pressure wheels 35 are arranged around the circumference of one driving wheel 31, and another part of the pressure wheels 35 are arranged around the circumference of another driving wheel 31.

[0104] It should be noted that the two driving parts 1 respectively drive the corresponding belt transmission components 3 to work, so that the two first slide rails 21 connected to the synchronous belt 33 in the belt transmission component 3 move relative to the two slide rail bodies 221, which not only realizes the position adjustment of the seat body 5 relative to the vehicle body floor, such as front and back or left and right movement, but also makes the position adjustment action of the seat body 5 smoother.

[0105] In order for the two drive units 1 to drive the corresponding belt drive assemblies 3 to operate synchronously, the two drive units 1 can be controlled by a single vehicle electronic control unit (ECU) to ensure synchronous operation of the two drive units 1. In addition, a pressure roller 35 is arranged circumferentially around the drive pulley 31 in each belt drive assembly 3. The pressure roller 35 and the drive pulley 31 respectively contact the outer and inner walls of the timing belt 33. The pressure roller 35 tightly presses the same timing belt 33 against the drive pulley 31 via the pressure roller 35, effectively preventing the timing belt 33 from detaching from the drive pulley 31.

[0106] In one embodiment of the present invention, as shown in Figures 10 to 14, the electric guide rail device includes a driving part 1, the synchronous belt 33 of the belt transmission assembly 3 is passed through the corresponding second slide rail 22, the driving part 1 is connected to the driving wheel 31 in one of the belt transmission components 3, and the belt transmission component 3 is connected to the other belt transmission component 3 for driving the other belt transmission component 3 to operate.

[0107] It should be noted that, two belt drive assemblies 3 can be driven to work simultaneously by one driving unit 1, and each synchronous belt 33 is passed through the corresponding second slide rail 22; specifically, the driving unit 1 works to drive the driving wheel 31 of one of the belt drive assemblies 3 to rotate. Since the two belt drive assemblies 3 are connected in transmission, one belt drive assembly 3 can simultaneously drive the other belt drive assembly 3 to transmit when it is in operation, thereby not only realizing the position adjustment of the seat body 5 relative to the vehicle body floor, such as front and rear or left and right movement, by one driving unit 1, but also making the position adjustment action of the seat body 5 smoother.

[0108] In one embodiment of the present invention, as shown in Figure 10, the driving wheel 31 includes a belt mounting portion and a tooth portion connected in sequence along its axial direction, the synchronous belt 33 is sleeved on the belt mounting portion, and the tooth portion in one belt transmission component 3 is meshed and connected with the tooth portion in another belt transmission component 3.

[0109] It should be noted that there are two drive wheels 31. Both drive wheels 31 include a belt mounting portion and a toothed portion. The belt mounting portion and the toothed portion are integrally formed along the central axis of the drive wheels 31, thereby improving the mechanical strength of the drive wheels 31 and correspondingly extending their service life. A synchronous belt 33 is mounted on the belt mounting portion of one drive wheel 31 and a pulley 32 mounted on the end of a second slide rail 22. The toothed portion of one drive wheel 31 is meshed with the toothed portion of the other drive wheel 31. The other synchronous belt 33 is mounted on the belt mounting portion of the other drive wheel 31 and the pulley 32 mounted on the end of the other second slide rail 22. In other words, through the mutual engagement of the drive wheels 31 in the two belt transmission assemblies 3, under the action of the drive unit 1, one drive wheel 31 is driven to rotate, so that the synchronous belt 33 corresponding to the other drive wheel 31 meshed with the first drive wheel 31 can be synchronously driven. This not only enables the position adjustment of the seat body 5 relative to the vehicle body floor, such as forward and backward or left and right movement, but also makes the position adjustment of the seat body 5 more stable.

[0110] In one embodiment of the present invention, as shown in Figure 11, the belt transmission assembly 3 also includes a pressure wheel 35 and a transmission gear 36, the driving wheel 31 includes a belt mounting portion and a tooth portion connected in sequence along its axial direction, the synchronous belt 33 is wound around the pulley 32, the belt mounting portion of the driving wheel 31 and the pressure wheel 35, and the tooth portion in one belt transmission assembly 3 is meshed and connected with the tooth portion in another belt transmission assembly 3 through the transmission gear 36.

[0111] It should be noted that there are two drive wheels 31 and at least one transmission gear 36. The tooth portion of one drive wheel 31 can be meshed and connected with the tooth portion of another drive wheel 31 through at least one transmission gear 36, so that the rotation of one drive wheel 31 can be transmitted to the other drive wheel 31 through at least one transmission gear 36, thereby not only realizing the movement of the first slide rail 21 relative to the second slide rail 22, but also making the position adjustment action of the seat body 5 relative to the vehicle body floor smoother.

[0112] As shown in FIG11 , there is one transmission gear 36 , and the drive wheel 31 includes a fourth drive wheel 314 , a fifth drive wheel 315 , and a sixth drive wheel 316 . The drive unit 1 is connected to the fourth drive wheel 314 , and the right side of the fourth drive wheel 314 can be meshed with the sixth drive wheel 316 , which is in transmission connection with the right synchronous belt 33 . The left side of the fourth drive wheel 314 can be meshed with the fifth drive wheel 315 via the transmission gear 36 , and the fifth drive wheel 315 is in transmission connection with the left synchronous belt 33 , thereby driving the fourth drive wheel 314 to rotate through the drive unit 1 . At this time, the fourth drive wheel 314 transmits the rotational force to the right synchronous belt 33 via the sixth drive wheel 316 , and the fourth drive wheel 314 transmits the rotational force to the left synchronous belt 33 via the transmission gear 36 and the fifth drive wheel 315 , thereby achieving synchronous sliding of the first slide rail relative to the two slide rail bodies in the second slide rail. In this embodiment, the drive unit 1 can be drivingly connected to any one of the drive wheels or the transmission gear 36 .

[0113] As shown in FIG12 , the number of transmission gears 36 is an even number, for example, four, and the drive wheel 31 includes a fourth drive wheel 314 and a sixth drive wheel 316. The drive unit 1 is connected to the fourth drive wheel 314. The right side of the fourth drive wheel 314 can be meshed with the sixth drive wheel 316 via four transmission gears 36. The sixth drive wheel 316 is transmission-connected to the right synchronous belt 33, and the left side of the fourth drive wheel 314 is transmission-connected to the left synchronous belt 33. Thus, the fourth drive wheel 314 is driven to rotate by the drive unit 1. At this time, the fourth drive wheel 314 transmits the rotational force to the right synchronous belt 33 via the four transmission gears 36 and the sixth drive wheel 316, and the fourth drive wheel 314 transmits the rotational force to the left synchronous belt 33, thereby achieving synchronous sliding of the first slide rail relative to the two slide rail bodies in the second slide rail. In this embodiment, the drive unit 1 can be drivingly connected to any drive wheel or any transmission gear 36.

[0114] In one embodiment of the present invention, as shown in Figure 13, one of the belt transmission components 3 further includes a transmission belt 37, a first drive wheel 311 and a second drive wheel 312, and the other belt transmission component 3 further includes a third drive wheel 313. The driving part 1 is connected to the second drive wheel 312, and the second drive wheel 312 is meshed and connected with the first drive wheel 311. The second drive wheel 312 is transmission-connected to the third drive wheel 313 through the transmission belt 37, and the first drive wheel 311 and the third drive wheel (313) are respectively connected to the synchronous belts 33 of the two belt transmission components 3.

[0115] It should be noted that the number of drive wheels 31 in one belt transmission assembly 3 is two, namely the first drive wheel 311 and the second drive wheel 312 , and the number of drive wheels 31 in the other belt transmission assembly 3 is one, defined as the third drive wheel 313 .

[0116] Specifically, as shown in Figure 13, the driving wheel 31 is connected to the second driving wheel 312, and the second driving wheel 312 is meshed with the first driving wheel 311 on the left side. The left synchronous belt 33 is connected to the first driving wheel 311 and the left pulley 32. The second driving wheel 312 is connected to the third driving wheel 313 through the transmission belt 37, and the right synchronous belt 33 is connected to the third driving wheel 313 and the right pulley 32. Therefore, under the driving action of the driving unit 1, the second driving wheel 312 can not only drive the first driving wheel 311 to rotate, but also drive the third driving wheel 313 to rotate through the transmission belt 37. The first driving wheel 311 and the third driving wheel 313 respectively drive the corresponding synchronous belts 33 to rotate, thereby not only achieving the movement of the first slide rail 21 relative to the second slide rail 22, but also because the second driving wheel 312 and the third driving wheel 313 are connected by the transmission belt 37, the noise of the two belt transmission assemblies 3 during operation can be reduced, and the position adjustment action of the seat body 5 relative to the vehicle body floor can be made smoother.

[0117] In one embodiment of the present invention, as shown in Figure 14, the inner wall and outer wall of the synchronous belt 33 have internal teeth and external teeth respectively, and the internal teeth of the synchronous belt 33 are sleeved on the pulley 32 and the driving wheel 31. The synchronous belts 33 in the two belt transmission assemblies 3 are meshed and connected through the external teeth, and the two driving wheels 31 are arranged opposite to each other for tightening the meshing of the two synchronous belts 33.

[0118] It should be noted that there are two drive wheels 31 and two synchronous belts 33, and both the inner and outer walls of the two synchronous belts 33 have friction surfaces. The inner and outer walls of the synchronous belts 33 are defined as internal and external teeth, respectively. In other words, the two synchronous belts 33 in the two belt drive assemblies 3 are driven by the meshing of their respective external teeth. The two drive wheels 31 are arranged adjacent to each other to ensure a tighter meshing of the external teeth of the two synchronous belts 33. Each synchronous belt 33 is connected to the corresponding first slide rail 21 via a connector 4.

[0119] There may be one pulley fixing member 222 , ie one pulley fixing member 222 is connected to two rail bodies 221 ; or there may be two pulley fixing members 222 , ie one pulley fixing member 222 is connected to corresponding rail bodies 221 .

[0120] Specifically, the driving unit 1 works to drive one of the driving wheels 31 to rotate. At this time, the driving wheel 31 not only drives the corresponding synchronous belt 33 for transmission, but also drives another synchronous belt 33 for synchronous transmission through the synchronous belt 33, so that the two first slide rails 21 connected to the synchronous belt 33 can move synchronously relative to the second slide rail 22, which not only realizes the position adjustment of the seat body 5 relative to the vehicle body floor, such as front and back or left and right movement, but also makes the position adjustment action of the seat body 5 smoother.

[0121] In one embodiment of the present invention, as shown in Figure 15, the belt transmission assembly 3 also includes a pressure wheel 35 and a driving wheel 31, and the driving wheel 31 includes two belt mounting parts connected in sequence along its axial direction. The synchronous belts 33 of the two belt transmission assemblies 3 are respectively mounted on the two belt mounting parts and the pulley 32, and the pressure wheel 35 and the driving wheel 31 are respectively connected to the outer wall and the inner wall of the synchronous belt 33, for pressing the two synchronous belts 33 on each of the belt mounting parts.

[0122] It should be noted that there is one drive unit 1 and one drive wheel 31, and two synchronous belts 33. The inner walls of the two synchronous belts 33 have internal teeth, and the outer walls of the synchronous belts 33 can be smooth or have external teeth. The drive wheel 31 has two belt mounting portions, each for winding a synchronous belt 33. There can be at least one pressure wheel 35, which is arranged around the circumference of the drive wheel 31 and is used to press the two synchronous belts 33 against the belt mounting portions of the drive wheel 31.

[0123] Specifically, the driving unit 1 works to drive the driving wheel 31 to rotate. At this time, the driving wheel 31 can drive the two synchronous belts 33 to transmit synchronously, so that the two first slide rails 21 connected to the two synchronous belts 33 can move synchronously relative to the second slide rail 22, which not only realizes the position adjustment of the seat body 5 relative to the vehicle body floor, such as front and back or left and right movement, but also makes the position adjustment action of the seat body 5 smoother.

[0124] In one embodiment of the present invention, as shown in Figure 16, the belt transmission assembly 3 further includes a first pressure wheel 351, a second pressure wheel 352 and a third pressure wheel 353. The synchronous belt 33 has internal teeth and external teeth. The internal teeth of one synchronous belt 33 are sleeved on one pulley 32 and the first pressure wheel 351, and the internal teeth of the other synchronous belt 33 are sleeved on the other pulley 32, the second pressure wheel 352, the third pressure wheel 353 and the driving wheel 31. The third pressure wheel 353 is provided on one side of the driving wheel 31 and is connected to the external teeth of the other synchronous belt 33, so as to press the other synchronous belt 33 onto the driving wheel 31. The two synchronous belts 33 are meshed and connected via the external teeth.

[0125] The first pressing wheel 351 and the second pressing wheel 352 are arranged between the two slide rail bodies 221 of the second slide rails 22 , and the first pressing wheel 351 is arranged on one side of the second pressing wheel 352 for pressing the meshing portion of the two synchronous belts 33 .

[0126] It should be noted that there is one driving part 1 and one driving wheel 31, and there are two synchronous belts 33. The inner walls and outer walls of the two synchronous belts 33 are respectively provided with internal teeth and external teeth. The first pressure wheel 351, the second pressure wheel 352 and the third pressure wheel 353 are respectively installed at different positions. For example, there is at least one first pressure wheel 351, which can be set on the left side of the center position of the two slide rail bodies 221. There is at least one second pressure wheel 352, which can be set on the right side of the center position of the two slide rail bodies 221. The first pressure wheel 351 and the second pressure wheel 352 are arranged opposite to each other for making the two synchronous belts 33 tightly meshed; the third pressure wheel 353 is arranged around the driving wheel 31 for pressing the synchronous belt 33 wrapped around the driving wheel 31 and the pulley 32 onto the driving wheel 31 to prevent the synchronous belt 33 from detaching from the driving wheel 31.

[0127] Specifically, the driving unit 1 works to drive the driving wheel 31 to rotate. At this time, the driving wheel 31 can drive a synchronous belt 33 to transmit, and then the synchronous belt 33 drives another synchronous belt 33 to transmit. In other words, the transmission speeds of the two synchronous belts 33 are the same, so that the two first slide rails 21 connected to the two synchronous belts 33 can move synchronously relative to the second slide rail 22, which not only realizes the position adjustment of the seat body 5 or the armrest box body relative to the vehicle body floor, such as front and back or left and right movement, but also makes the position adjustment action of the seat body 5 and the armrest box body smoother.

[0128] In one embodiment of the present invention, in combination with Figures 17 and 18, the belt transmission assembly 3 also includes an elastic tensioner 38, which is arranged below the pulley fixing member 222 and on one side of the pulley 32. The elastic tensioner 38 is connected to one of the pulleys 32 and is used to adjust the position of the pulley 32 during the assembly stage so that the tension of the two synchronous belts 33 is consistent.

[0129] It should be noted that the elastic tensioning member 38 is disposed below the pulley fixing member 222 and on one side of the pulley 32, thereby providing safety protection for the elastic tensioning member 38 and the pulley 32 through the pulley fixing member 222. The extension direction of the elastic tensioning member 38 is consistent with the arrangement direction of the two pulleys 32, so that when adjusting the tension of the synchronous belt 33 during the assembly phase, the position of the pulley 32 can be effectively and quickly adjusted to the correct position, so that the tension of the two synchronous belts 33 is adjusted to a consistent state, thereby ensuring the sliding synchronization of the upper and lower slide rails.

[0130] Normally, due to the assembly tolerance between the two pulleys 32 and the inconsistency in the tension of the two synchronous belts 33 during the assembly stage, the synchronous belt 33 may idle, which may affect the electric adjustment of the position of the seat body 5 or the armrest box body; in this embodiment, by arranging the elastic tensioning member 38 on one side of the pulley 32, and one end of the elastic tensioning member 38 is fixed, and the other end is connected to a pulley 32, the position of the pulley 32 can be adjusted through elastic deformation to adjust the tightness of the synchronous belt 33, and the position of the pulley 32 is fixed after the synchronous belt 33 is tensioned, thereby ensuring that the tension of the synchronous belt 33 in the two slide rail bodies 221 is the same, so that the position adjustment of the seat body 5 or the armrest box body relative to the vehicle body floor is smoother.

[0131] In one embodiment of the present invention, as shown in Figure 17, when the elastic tensioner 38 is a compression spring, the elastic tensioner 38 is arranged between the two pulleys 32 and adjacent to one of the pulleys 32. The compression spring restores its elasticity so that the pulley 32 on one side of the compression spring can move away from the other pulley 32 under the operation of the staff. In other words, the distance between the two pulleys 32 is increased to effectively adjust the tightness of the synchronous belt 33.

[0132] It should be noted that in FIG. 17 , the dotted compression spring and the pulley 32 are in positions before the tensioning action of the timing belt 33 is adjusted, and the solid compression spring and the pulley 32 are in positions after the tensioning action of the timing belt 33 is adjusted.

[0133] As shown in Figure 18, when the elastic tensioning member 38 is a tension spring, the elastic tensioning member 38 is arranged on the side of one pulley 32 away from the other pulley 32. Through the tensioning force of the tension spring, the pulley 32 on the side of the tension spring can be moved away from the other pulley 32 under the operation of the staff. In other words, the distance between the two pulleys 32 is increased to adjust the tightness of the synchronous belt 33.

[0134] It should be noted that in Figure 18, the dotted compression spring and pulley 32 are in position before adjusting the tensioning action of the timing belt 33, and the solid line compression spring and pulley 32 are in position after adjusting the tensioning action of the timing belt 33.

[0135] In one embodiment of the present invention, in combination with Figures 19, 20 and 21, the first slide rail 21 includes at least two slide rail members, at least two of the slide rail members are arranged at intervals along an extension direction perpendicular to the first slide rail 21, the slide rail member includes a moving member 212 and a first guide rail portion 211, the first guide rail portion 211 is arranged on a side perpendicular to the extension direction of the first slide rail 21, two groups of the moving members 212 are arranged at intervals along the extension direction perpendicular to the first slide rail 21, and the two groups of the moving members 212 are respectively connected to the first guide rail portion 211, the slide rail body 221 includes a second guide rail portion 2211, the first guide rail portion 211 is embedded in the second guide rail portion 2211, each two groups of the moving members 212 are respectively located in the second guide rail portion 2211, and are used to move relative to the second guide rail portion 2211; and the synchronous belt 33 is located between the moving member 212 and the second guide rail portion 2211.

[0136] It should be noted that each slide rail member includes two groups of moving members 212. For example, the slide rail member on the left side includes two groups of moving members 212. When each group of moving members includes two front and rear moving members 212, the two moving members 212 are respectively installed at both ends of the extension direction of the first guide rail portion 211, thereby increasing the supporting load of the second slide rail 22 on the first slide rail 21. The number of slide rail members in the first slide rail 21 matches the number of slide rail bodies 221 in the second slide rail 22; the synchronous belt 33 is located between the moving member 212 and the second guide rail portion 2211. In other words, the synchronous belt 33 is installed inside the slide rail body 221, so that the synchronous belt 33 is shielded and protected by the slide rail body 221 to prevent debris from invading other components in the belt drive assembly 3 through the synchronous belt 33 to affect the transmission action.

[0137] Since the first guide rail portion 211 and the moving member 212 are respectively disposed within the corresponding second guide rail portion 2211, the first guide rail portion 211 not only guides the movement of the moving member 212 within the second guide rail portion 2211, but also prevents the first guide rail portion 211 from separating from the second guide rail portion 2211, thereby improving the stability of the movement of the first guide rail portion 211 relative to the second guide rail portion 2211. The moving member 212 and the first guide rail portion 211 can be connected to form an integral first slide rail 21, thereby facilitating the assembly of the first slide rail 21 and the second slide rail 22.

[0138] Specifically, the moving member 212 may be a roller structure or a slide rail structure. As long as the moving member 212 can move smoothly on the second slide rail 22 , it is applicable to the present technical solution and is not specifically limited here.

[0139] In one embodiment of the present invention, as shown in FIG. 20 , the slide rail body 221 further includes a support portion 2212 , which is disposed between the two second guide rail portions 2211 , and a top surface of the support portion 2212 is lower than a bottom surface of the second guide rail portion 2211 .

[0140] It should be noted that the slide rail body 221 may include two second guide rail portions 2211. Since the support portion 2212 is provided between the two second guide rail portions 2211 to connect the two second guide rail portions 2211 to form an integral slide rail body 221, the support portion 2212 and the two second guide rail portions 2211 may be an integrally formed structure, thereby improving the mechanical strength of the slide rail body 221. The top surface of the support portion 2212 is lower than the bottom surface of the second guide rail portion 2211. The bottom of the support portion 2212 may be provided on the vehicle body floor, and the moving member 212 moves within the second guide rail portion 2211. In other words, the bottom surface of the moving member 212 is also higher than the top surface of the support portion 2212, thereby effectively preventing debris on the vehicle body floor from entering the moving member 212 from the end of the slide rail body 221 and causing jamming, thereby reducing the failure rate of the electric guide rail device.

[0141] In one embodiment of the present invention, in combination with Figures 20 and 21, the electric guide rail device also includes a connecting member 4, the connecting member 4 includes a first connecting seat 41 and a second connecting seat 42, the first connecting seat 41 is connected to the first guide rail portion 211 of the first slide rail 21, the first connecting seat 41 is connected to the second connecting seat 42 and the first connecting seat 41 and / or the second connecting seat 42 is provided with an installation groove, and part of the synchronous belt 33 is passed through the installation groove, and the first connecting seat 41 is connected to the second connecting seat 42.

[0142] It should be noted that, when the first connecting seat 41 is connected to the first guide rail portion 211 and the first connecting seat 41 is connected to the second connecting seat 42, a mounting groove can be set on the connecting member 4 to facilitate the synchronous belt 33 to pass through the mounting groove. Since the first connecting seat 41 is connected to the first guide rail portion 211, and the connecting member 4 is connected to the synchronous belt 33, the connecting member 4 connects the local structure of the synchronous belt 33 to the first slide rail 21, so that the synchronous belt 33 can drive the first slide rail 21 to move relative to the second slide rail 22 during transmission.

[0143] As shown in FIG21 , the first connecting seat 41 and the second connecting seat 42 can be detachably connected. This not only connects the synchronous belt 33 and the first slide rail 21 into an integral structure via the connector 4, facilitating the synchronous belt 33 to drive the first slide rail 21 relative to the second slide rail 22, but also facilitates repair of the synchronous belt 33. Specifically, the first connecting seat 41 and the second connecting seat 42 can be connected by bolts.

[0144] As shown in Figure 22, the first connecting seat 41 and the second connecting seat 42 can be an integrally formed structure, with an installation groove opened on the first connecting seat 41, or an installation groove opened on the second connecting seat 42, or an installation groove opened on both the first connecting seat 41 and the second connecting seat 42.

[0145] As shown in Figure 19, another embodiment of the present invention provides a seat assembly, including the electric guide rail device as described above, and also including a seat body 5, wherein the seat body 5 is connected to the first slide rail 21 of the electric guide rail device; the extension direction of the first slide rail 21 and the second slide rail 22 is parallel to the movement direction of the seat body 5.

[0146] It should be noted that the extension direction of the first and second slide rails 21, 22 is parallel to the movement direction of the seat body 5. This means that if the extension direction of the first and second slide rails 21, 22 is consistent with the front-to-back direction of the vehicle, the seat body 5 can be adjusted in the front-to-back direction (driving direction) relative to the second slide rail 22 on the vehicle body floor via the first slide rail 21. If the extension direction of the first and second slide rails 21, 22 is consistent with the left-to-right direction of the vehicle, the seat body 5 can be adjusted in the left-to-right direction relative to the second slide rail 22 on the vehicle body floor via the first slide rail 21. The seat assembly at least has all the technical effects of the electric guide rail device, which will not be repeated here.

[0147] Another embodiment of the present invention provides a central armrest box, including the electric guide rail device as described above, and also including an armrest box body, wherein the armrest box body is connected to the first slide rail 21 of the electric guide rail device; the extension direction of the first slide rail 21 and the second slide rail 22 is parallel to the movement direction of the armrest box body.

[0148] It should be noted that the armrest box body in the central armrest box is a storage device located between the driver's seat and the front passenger seat. It is usually located in the space between the seat and the center console, and can provide additional storage space for small items such as wallets, mobile phones, keys, etc. The armrest box can also serve as an armrest to provide additional comfortable support. The extension direction of the first slide rail 21 and the second slide rail 22 is parallel to the movement direction of the armrest box body, which means that if the extension direction of the first slide rail 21 and the second slide rail 22 is consistent with the front and rear direction of the car, the armrest box body can be adjusted in the front and rear direction (driving direction) relative to the second slide rail 22 on the vehicle body floor through the first slide rail 21; if the interior space of the vehicle is large enough, the extension direction of the first slide rail 21 and the second slide rail 22 can be consistent with the left and right direction of the car, and the armrest box body can be adjusted in the left and right direction relative to the second slide rail 22 on the vehicle body floor through the first slide rail 21. The central armrest box has at least all the technical effects of the electric guide rail device, which will not be repeated here.

[0149] Another embodiment of the present invention provides an automobile, comprising the seat assembly as described in the above embodiment, or the central armrest box as described in the above embodiment, or the electric guide rail device as described in the above embodiment.

[0150] It should be noted that the vehicle also includes a vehicle body floor, and the second slide rail 22 in the seat assembly can be set on the vehicle body floor. The vehicle at least has all the technical effects of the seat assembly, the center console box or the electric guide rail device, which are not specifically limited here.

[0151] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. An electric guide rail device, characterized in that: The invention comprises a slide rail assembly (2), a driving unit (1) and a belt transmission assembly (3), wherein the slide rail assembly (2) comprises a first slide rail (21) arranged on a seat body (5) or an armrest box body and a second slide rail (22) arranged on a vehicle body floor, wherein the first slide rail (21) and the second slide rail (22) are slidably matched; the belt transmission assembly (3) comprises a driving wheel (31), a pulley (32) and a synchronous belt (33), wherein at least a part of the synchronous belt (33) is arranged on the second slide rail (22), and the synchronous belt (33) is wound around the driving wheel (31) and the pulley (32), wherein the driving unit (1) is connected to the driving wheel (31) for driving the driving wheel (31) to rotate, and the synchronous belt (33) is connected to the first slide rail (21); The central axes of the driving wheel (31) and the belt pulley (32) are both arranged in the vertical direction.

2. The electric guide rail device according to claim 1, characterized in that: The second slide rail (22) comprises a slide rail body (221) and a pulley fixing member (222); the pulley fixing member (222) is arranged on a side of the slide rail body (221); and at least a portion of the belt transmission assembly (3) is arranged on the pulley fixing member (222).

3. The electric guide rail device according to claim 2, characterized in that: The pulley fixing member (222) comprises a pulley mounting seat (2221) and a protective cover (2222); the pulley mounting seat (2221) is arranged at the end of the protective cover (2222) along the extension direction of the second slide rail (22); the pulley (32) is installed on the pulley mounting seat (2221); and the driving wheel (31) and the pulley (32) are arranged on the protective cover (2222).

4. The electric guide rail device according to claim 2, characterized in that: The second slide rail (22) comprises at least two slide rail bodies (221), and the at least two slide rail bodies (221) are arranged at intervals along an extension direction perpendicular to the second slide rail bodies. The number of the driving part (1) and the synchronous belt (33) is one each, and the pulley fixing member (222) has a cavity, and at least part of the synchronous belt (33), the driving part (1) and the driving wheel (31) are arranged in the cavity.

5. The electric guide rail device according to claim 4, characterized in that: The synchronous belt (33) is passed through one of the slide rail bodies (221), and there are two pulleys (32), which are respectively arranged at two ends of the second slide rail (22).

6. The electric guide rail device according to claim 4, characterized in that: The belt transmission assembly (3) further comprises a tensioning wheel (34), wherein the two tensioning wheels (34) are respectively arranged at the two ends of the second slide rail (22), the two pulleys (32) are respectively arranged at the two ends of the second slide rail (22), and the tensioning wheel (34) is arranged on one side of the pulley (32).

7. The electric guide rail device according to claim 6, characterized in that: A portion of the synchronous belt (33) is inserted into the slide rail body (221), and another portion of the synchronous belt (33) is inserted into the pulley fixing member (222); or at least a portion of the synchronous belt (33) is arranged in the pulley fixing member (222).

8. The electric guide rail device according to claim 4, characterized in that: The pulley (32) and the driving wheel (31) are respectively arranged at two ends of the second slide rail (22), a portion of the synchronous belt (33) is passed through the slide rail body (221), and the synchronous belt (33) is sleeved on the driving wheel (31) and the pulley (32).

9. The electric guide rail device according to claim 4, characterized in that: The belt transmission assembly (3) further comprises a tensioning wheel (34) and a pressure wheel (35); the two pulleys (32) are respectively arranged at one end of the two second slide rails (22); the plurality of tensioning wheels (34) are respectively arranged at the other end of the two second slide rails (22); the pressure wheel (35) and the driving wheel (31) are respectively arranged in close contact with the outer wall and the inner wall of the synchronous belt (33) for pressing the synchronous belt (33) onto the driving wheel (31); the synchronous belt (33) is wound around the pulley (32), the tensioning wheel (34) and the driving wheel (31); and different parts of the synchronous belt (33) are passed through the two slide rail bodies (221).

10. The electric guide rail device according to claim 2, characterized in that: The invention comprises two belt transmission assemblies (3), wherein the second slide rail (22) comprises at least two slide rail bodies (221), and the at least two slide rail bodies (221) are arranged at intervals along an extension direction perpendicular to the slide rail bodies, and the synchronous belts (33) of the two belt transmission assemblies (3) are respectively passed through the two slide rail bodies (221).

11. The electric guide rail device according to claim 10, characterized in that: The invention comprises two driving parts (1), each of the driving parts (1) is connected to the driving wheel (31) in each of the belt transmission assemblies (3), and the belt transmission assembly (3) further comprises a plurality of pressure wheels (35), a part of the pressure wheels (35) are arranged around the circumference of one of the driving wheels (31), and another part of the pressure wheels (35) are arranged around the circumference of another of the driving wheels (31).

12. The electric guide rail device according to claim 10, characterized in that: It also includes a driving part (1), the synchronous belt (33) of the belt transmission assembly (3) is inserted into the corresponding second slide rail (22), the driving part (1) is connected to a driving wheel (31) in one of the belt transmission assemblies (3), and one of the belt transmission assemblies (3) is in transmission connection with another of the belt transmission assemblies (3) for driving the other of the belt transmission assemblies (3) to operate.

13. The electric guide rail device according to claim 12, characterized in that: The driving wheel (31) comprises a belt mounting portion and a toothed portion which are sequentially connected along its axial direction; the synchronous belt (33) is sleeved on the belt mounting portion; the toothed portion in one belt transmission assembly (3) is meshedly connected with the toothed portion in another belt transmission assembly (3).

14. The electric guide rail device according to claim 12, characterized in that: The belt transmission assembly (3) further comprises a pressure wheel (35) and a transmission gear (36); the driving wheel (31) comprises a belt mounting portion and a toothed portion connected in sequence along its axial direction; the synchronous belt (33) is wound around the pulley (32), the belt mounting portion of the driving wheel (31) and the pressure wheel (35); the toothed portion in one belt transmission assembly (3) is meshedly connected with the toothed portion in another belt transmission assembly (3) via the transmission gear (36).

15. The electric guide rail device according to claim 12, characterized in that: One of the belt transmission assemblies (3) further comprises a transmission belt (37), a first driving wheel (311) and a second driving wheel (312); the other belt transmission assembly (3) further comprises a third driving wheel (313); the driving portion (1) is connected to the second driving wheel (312); the second driving wheel (312) is meshingly connected to the first driving wheel (311); the second driving wheel (312) is transmission-connected to the third driving wheel (313) via the transmission belt (37); the first driving wheel (311) and the third driving wheel (313) are respectively connected to the synchronous belts (33) of the two belt transmission assemblies (3).

16. The electric guide rail device according to claim 12, characterized in that: The inner wall and outer wall of the synchronous belt (33) have inner teeth and outer teeth respectively; the inner teeth of the synchronous belt (33) are sleeved on the pulley (32) and the driving wheel (31); the synchronous belts (33) in the two belt transmission assemblies (3) are meshed and connected via the outer teeth; the driving wheels (31) in the two belt transmission assemblies (3) are arranged opposite to each other and are used to tighten the meshing parts of the two synchronous belts (33).

17. The electric guide rail device according to claim 10, characterized in that: The belt transmission assembly (3) further comprises a pressure wheel (35) and a driving wheel (31), wherein the driving wheel (31) comprises two belt mounting parts connected in sequence along its axial direction, and the synchronous belts (33) of the two belt transmission assemblies (3) are respectively sleeved on the two belt mounting parts and the belt pulley (32), and the pressure wheel (35) and the driving wheel (31) are respectively connected to the outer wall and the inner wall of the synchronous belt (33) for pressing each synchronous belt (33) onto each belt mounting part.

18. The electric guide rail device according to claim 10, characterized in that: The belt transmission assembly (3) further comprises a first pressure wheel (351), a second pressure wheel (352) and a third pressure wheel (353), the synchronous belt (33) having internal teeth and external teeth, the internal teeth of one synchronous belt (33) being sleeved on one pulley (32) and the first pressure wheel (351), the internal teeth of another synchronous belt (33) being sleeved on another pulley (32), the second pressure wheel (352) and the driving wheel (31), the third pressure wheel (353) being arranged on one side of the driving wheel (31) and connected to the external teeth of another synchronous belt (33), and being used for pressing the other synchronous belt (33) onto the driving wheel (31), and the two synchronous belts (33) being meshed and connected via the external teeth; The first clamping wheel (351) and the second clamping wheel (352) are arranged between the slide rail bodies (221) of the two second slide rails (22), and the first clamping wheel (351) is arranged on one side of the second clamping wheel (352) to clamp the meshing point of the two synchronous belts (33).

19. The electric guide rail device according to claim 2, characterized in that: The belt transmission assembly (3) also includes an elastic tensioning member (38), which is arranged below the pulley fixing member (222) and on one side of the pulley (32). The elastic tensioning member (38) is connected to one of the pulleys (32) and is used to adjust the position of the pulley (32) during the assembly stage so that the tension of the two synchronous belts (33) is consistent.

20. The electric guide rail device according to claim 2, characterized in that: The first slide rail (21) comprises at least two slide rail members, at least two of the slide rail members are arranged at intervals along an extension direction perpendicular to the first slide rail, the slide rail member comprises a moving member (212) and a first guide rail portion (211), the first guide rail portion (211) is arranged on a side perpendicular to the extension direction of the first slide rail (21), two groups of the moving members (212) are arranged at intervals along the extension direction perpendicular to the first slide rail (21), and the two groups of the moving members (212) are respectively connected to the first guide rail portion (211), the slide rail body (221) comprises a second guide rail portion (2211), the first guide rail portion (211) is embedded in the second guide rail portion (2211), each of the two groups of the moving members (212) are respectively located in the second guide rail portion (2211), and are used to move relative to the second guide rail portion (2211); and the synchronous belt (33) is located between the moving member (212) and the second guide rail portion (2211).

21. The electric guide rail device according to claim 20, characterized in that: The slide rail body (221) further comprises a support portion (2212), wherein the support portion (2212) is arranged between the two second guide rail portions (2211), and the top surface of the support portion (2212) is lower than the bottom surface of the second guide rail portion (2211).

22. The electric guide rail device according to claim 20, characterized in that: It also includes a connecting member (4), the connecting member (4) includes a first connecting seat (41) and a second connecting seat (42), the first connecting seat (41) is connected to the first guide rail portion (211) of the first slide rail (21), the first connecting seat (41) is connected to the second connecting seat (42), and the first connecting seat (41) and / or the second connecting seat (42) are provided with a mounting groove, and part of the synchronous belt (33) is passed through the mounting groove, and the first connecting seat (41) is connected to the second connecting seat (42).

23. A seat assembly, characterized in that: It comprises an electric guide rail device as described in any one of claims 1 to 22, and also comprises a seat body (5), wherein the seat body (5) is connected to a first slide rail (21) of the electric guide rail device; the extension direction of the first slide rail (21) and the second slide rail (22) is parallel to the movement direction of the seat body (5).

24. A central armrest box, characterized in that: It comprises an electric guide rail device as described in any one of claims 1 to 22, and also comprises an armrest box body, wherein the armrest box body is connected to the first slide rail (21) of the electric guide rail device; the extension direction of the first slide rail (21) and the second slide rail (22) is parallel to the movement direction of the armrest box body.

25. A car, characterized in that: It comprises the seat assembly as claimed in claim 23, or the central armrest box as claimed in claim 24, or the electric guide rail device as claimed in any one of claims 1 to 22.

Images