Slide rail component and automobile seat slide rail

Abstract

The present application relates to the field of automobile seats, and in particular to a slide rail component, comprising a track, at least two block assemblies sliding on the track, a lead screw rotating on the track for respectively driving the two block assemblies to move, two lead screws being provided, and the block assembly comprising a slider sliding on the track, a driving block and a supporting block provided on the slider, a single driving block on the slider being threadedly connected to the corresponding lead screw, and a single supporting block on the slider being slidingly provided with another lead screw, a shock-absorbing connection structure for installing the driving block and the supporting block being further provided on the slider, a driving assembly for driving the lead screw to rotate being provided at the end of the track, and the above scheme greatly reduces the swinging phenomenon of the two lead screws, thereby ensuring the normal operation of the slide rail component.

Description

Technical Field

[0001] The present application relates to the field of automobile seats, and in particular to a slide rail component and an automobile seat slide rail. Background Art

[0002] In existing cars, especially MPVs, a set of seat rails is required to move the front and rear rows of seats while also allowing the seats to rotate and adjust. This requires the seat rails to be at least two meters long to accommodate two different seats on one set of rails.

[0003] Existing systems typically utilize a motor and a gearbox, converting the high speed of the motor shaft to a higher speed by varying the transmission ratio. A lead screw, at least one meter long, is installed within the slideway. The gearbox's drive shaft and the lead screw are synchronously fixed, allowing the motor to drive the drive shaft within the gearbox, achieving synchronous rotation of the lead screw. A slider is provided on the slideway, threadedly connected to the lead screw. The seat is mounted on the slider, enabling movement and adjustment of the seat.

[0004] However, in actual production and customer feedback, it was found that the seat was not stable. The main reason was that the length of the screw was more than one meter. When the screw was driven to rotate at high speed, the vibrations at different parts were inconsistent, causing the screw to swing, which led to greater vibration and noise during the sliding of the seat. Summary of the Invention

[0005] In order to ensure the stability of seat adjustment, reduce vibration, and guarantee the customer's usage experience, the present application provides a slide rail component and a car seat slide rail.

[0006] The present application provides a slide rail component, which adopts the following technical solution:

[0007] A slide rail component comprises a track, at least two block assemblies slide on the track, a lead screw rotates on the track for driving the two block assemblies to move respectively, the lead screws are provided in two, the block assembly comprises a slider sliding on the track, a driving block and a support block provided on the slider, the driving block on a single slider is threadedly connected to the corresponding lead screw, and the support block on a single slider is slidingly arranged with another lead screw, the slider is also provided with a shock-absorbing connection structure for installing the driving block and the support block, and a driving assembly for driving the lead screw to rotate is provided at the end of the track.

[0008] By adopting the above technical solution, two lead screws are provided. During actual use, one block assembly is driven by one lead screw, and the other block assembly is driven by the other lead screw. Since each block assembly is provided with a support block and a driving block, the driving block is used to drive the corresponding slider, and the support block supports the lead screw at the corresponding slider position. At the same time, since the support block and the driving block mutually restrict the two lead screws, the swinging phenomenon of the two lead screws is greatly reduced, thereby ensuring the normal operation of the slide rail component. At the same time, the shock-absorbing connection structure, on the one hand, realizes shock absorption at the slider position, and on the other hand, ensures the stability of the support block and the driving block installed on the slider.

[0009] Optionally, the shock-absorbing connecting member structure includes a first groove on the side wall of the slider for embedding the driving block, a second groove for embedding the supporting block, rubber sleeves respectively sleeved on the outside of the driving block and the supporting block, and a clamping plate clamped on the two rubber sleeves. The slider is provided with a first hole for one of the screws to pass through, and the slider is also provided with a second hole for the other screw to pass through. A driving hole connected to the first hole is provided on the driving block, and a supporting hole connected to the second hole is provided on the support block. One of the screws passes through the driving hole and is threadedly connected to the driving block, and the other screw passes through the supporting hole and is clearance-matched with the support block.

[0010] By adopting the above technical solution, the driving block and the support block can be detachably installed on the slider, which is convenient for later maintenance. During the actual transmission process, the support hole realizes the support and limitation of the lead screw, and the driving hole cooperates with the lead screw to realize the driving of the slider; at the same time, the rubber sleeve reduces the amplitude of vibration on the one hand, and improves the stability of the installation of the driving block and the support block on the slider on the other hand.

[0011] Optionally, the driving hole includes a threaded hole and a mounting hole integrally formed at one end of the threaded hole, the inner diameter of the mounting hole is larger than the inner diameter of the threaded hole, a first plastic sleeve for supporting and limiting the swing of the screw is installed in the mounting hole, and a second plastic sleeve for supporting and limiting the swing of another screw is also installed in the supporting hole.

[0012] By adopting this technical solution, the lead screw drives the slider, which is driven by the threaded connection between the lead screw and the threaded hole. The first plastic sleeve supports the driven lead screw, with a clearance fit between the first plastic sleeve and the lead screw. The second plastic sleeve also has a clearance fit with the other lead screw, supporting and limiting the other lead screw. This prevents the two lead screws from swinging significantly during transmission, ensuring transmission stability.

[0013] Optionally, the drive assembly includes a brushless motor arranged at the end of the screw and a flexible square shaft coaxially fixed to the end of the brushless motor's rotating shaft. The brushless motor is fixedly mounted at the end of the track, and a square groove is opened at one end of the screw facing the brushless motor, and the square shaft is inserted into the square groove.

[0014] By adopting the above technical solution, the brushless motor is connected to the controller, and the rotation speed can be freely adjusted. Since the rotating shaft and the screw of the brushless motor are directly connected, the effective transmission loss is small. The square shaft is a flexible shaft and is connected by plug-in, which greatly improves the convenience of subsequent installation.

[0015] Optionally, the number of the block assemblies is four, and two adjacent block assemblies form a supporting component, wherein one lead screw is used to drive one of the supporting components to move, and the other lead screw is used to drive the other supporting component to move.

[0016] By adopting the above technical solution, due to the number of block assemblies provided, spaced supports are formed in the length direction of the lead screw, thereby making it difficult for the lead screw to swing during the process of driving the lead screw to rotate at high speed.

[0017] In the second aspect, the present application discloses a car seat slide rail, which adopts the following technical solution:

[0018] A car seat slide rail comprises two slide rail components, and the two slide rail components are arranged in parallel. A mounting seat is installed above the supporting component, and the ends of the mounting seat are fixedly connected to two sliding blocks respectively.

[0019] By adopting the above technical solution, the car seat is installed on the mounting seat, one of which is used to install the front seat, and the other is used to install the rear seat. Since the block components are set to four, support is formed for the screw at intervals in the length direction, making it difficult for the seat to swing during use, reducing noise.

[0020] Optionally, a wiring harness box is provided on one of the slide rail components, and the wiring harness box is provided on one side of the track. A tank chain is installed in the wiring harness box, and a wiring harness is passed through the tank chain. One end of the wiring harness is connected to the seat button, and the other end is connected to the seat controller.

[0021] By adopting the above technical solution, during actual use, the wiring harness box and the track are fixedly installed on the vehicle body. The wiring harness box is used to install the cable harness required for the seat. The mounting seat drives the tank chain to move during movement. Due to the bending and shrinkage of the tank chain itself, the cable can be retracted and extended freely during movement, making it difficult to get tangled.

[0022] Optionally, a plurality of guide wheels are provided at the opening of the harness box, the plurality of guide wheels form an arc-shaped passage for the sliding of the tank chain, and reinforcing ribs are evenly fixed on the upper portion of the track.

[0023] By adopting the above technical solution, the guide wheel makes it easier for the tank chain to retract and move, the reinforcing ribs enhance the overall strength of the track, and improve the stability of the seat slide rail.

[0024] Optionally, the reinforcing rib is bent toward one end of the wiring harness box to form an installation gap, and the installation gap is located between the wiring harness box and the track. A slide is fixed in the installation gap, and a limit block is fixed at the end of the reinforcing rib, and the limit block is located above the slide.

[0025] By adopting the above technical solution, the movement of the tank chain is limited, so that the mounting seat drives the end of the tank chain to move during the movement, and the tank chain and the wiring harness are unlikely to become entangled, thereby ensuring the stability of the sliding.

[0026] Optionally, a driving rod is rotatably arranged on the side wall of the slider, and limited swing components are respectively arranged at both ends of the driving rod, and the limited swing components include a first limiting arc plate and a second limiting arc plate that slide on the side wall of the slider. Both ends of the driving rod are provided with bidirectional threads, and the first limiting arc plate and the second limiting arc plate are arranged opposite to each other and are threadedly connected to the bidirectional thread at the same end, and the thread rotation directions of the first limiting arc plate and the second limiting arc plate are opposite.

[0027] By adopting the above technical solution, since the first plastic sleeve and the second plastic sleeve will be worn by the lead screw and the slider during movement, by rotating the driving rod, the first limiting arc plate and the second limiting arc plate threadedly connected to the end of the driving rod slide toward each other, thereby approaching the lead screw, further reducing the gap between the lead screw and the slider, and realizing the limitation of the swing of the lead screw.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. The driving block is used to drive the corresponding slider, and the support block supports the lead screw at the corresponding slider. At the same time, since the support block and the driving block on a single slider restrict each other for the two lead screws, the swing of the two lead screws is greatly reduced, ensuring the normal operation of the slide rail components.

[0030] 2. The first plastic sleeve supports the driven lead screw, with a clearance fit between them. The second plastic sleeve also has a clearance fit with the other lead screw, supporting and limiting the other lead screw. This prevents the two lead screws from swinging significantly during transmission, ensuring transmission stability.

[0031] 3. It is known that there are four screws on the two tracks. The controller is used to synchronously drive two of the screws on the two tracks to move the front seats, and the controller is used to synchronously drive the other two screws to move the rear seats. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the slide rail components.

[0033] Figure 2 This is a schematic diagram of the brushless motor part of the slide rail assembly.

[0034] Figure 3 This is a schematic diagram of the slider part of the slide rail assembly.

[0035] Figure 4 This is a cross-sectional view of the drive block in the slide rail assembly.

[0036] Figure 5 It is a cross-sectional view of the support block in the slide rail assembly.

[0037] Figure 6 It is a schematic diagram of the overall structure of the first embodiment of the automobile seat slide rail.

[0038] Figure 7 It is a schematic diagram of a wiring harness box of the first embodiment in a car seat slide rail.

[0039] Figure 8 This is a schematic diagram of the first embodiment of the harness box in the car seat slide, mainly used to display the tank chain.

[0040] Figure 9 This is a schematic diagram of the slider portion of the second embodiment of the automobile seat slide rail.

[0041] Reference numerals: 1, track; 2, block assembly; 3, lead screw; 4, slider; 5, drive block; 6, support block; 7, drive assembly; 8, first slot; 9, second slot; 10, rubber sleeve; 11, clamping plate; 12, first hole; 13, second hole; 14, drive hole; 15, support hole; 16, threaded hole; 17, mounting hole; 18, first plastic sleeve; 19, second plastic sleeve; 20, brushless motor; 21, flexible square shaft; 22, square slot; 23 , support component; 24, mounting seat; 25, wiring harness box; 26, tank chain; 27, guide wheel; 28, curved aisle; 29, reinforcement rib; 30, installation gap; 31, slide; 32, limit block; 33, drive rod; 34, swing limiting component; 35, first limit arc plate; 36, second limit arc plate; 37, bidirectional thread; 38, first screw rod; 39, second screw rod; 40, first support member; 41, second support member; 42, linear guide rail. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-9 This application is described in further detail.

[0043] In a first aspect, an embodiment of the present application discloses a slide rail component.

[0044] Reference Figure 1 A slide rail assembly includes a track 1 on which at least two block assemblies 2 are slidably disposed along the length of the track 1. In this embodiment, two groups of block assemblies 2 are provided, each group containing two block assemblies. In other words, four block assemblies 2 are provided on one track 1, with two adjacent block assemblies forming a group. Each group of block assemblies 2 is combined to form a support member 23, for a total of two groups. The two groups of block assemblies 2 are sequentially disposed along the length of the track 1.

[0045] Reference Figure 1 Two parallel lead screws 3 are rotatably mounted on the track 1. In this embodiment, one lead screw 3 is configured as a first lead screw 38, and the other lead screw 3 is configured as a second lead screw 39. The two support members 23 are configured as a first support member 40 and a second support member 41, respectively. Thus, the first lead screw 38 drives the first support member 40 to move, and the second lead screw 39 drives the second support member 41 to move.

[0046] Reference Figure 1 and Figure 2 A drive assembly 7 is provided at the end of the lead screw 3. The drive assembly 7 includes a brushless motor 20 and a flexible square shaft 21. Two brushless motors 20 are provided, one of which is used to drive the first lead screw 38, and the other is used to drive the second lead screw 39. To facilitate later maintenance and disassembly, the brushless motor 20 is fixedly connected to the end of the track 1 by bolts, and the flexible square shaft 21 is fixed to the end of the rotating shaft of the brushless motor 20. A square groove 22 is provided at the end of the corresponding lead screw 3. During the driving process, the end of the flexible square shaft 21 away from the brushless motor 20 is inserted into the square groove 22, thereby driving the corresponding lead screw 3 to rotate.

[0047] Reference Figure 1 、 Figure 2 and Figure 3 In the process of driving the screw 3 to rotate at high speed, in order to reduce the circular runout of the screw 3, the block assembly 2 includes a slider 4, a support block 6 and a driving block 5. The slider 4 is slidably set on the track 1. In order to further improve the stability of the sliding of the slider 4, a linear guide rail 42 is fixedly installed in the inner cavity of the track 1, and the slider 4 slides on the linear guide rail 42.

[0048] Reference Figure 3The slider 4 is also provided with a shock-absorbing connection structure for mounting the driving block 5 and the supporting block 6. The shock-absorbing connection structure includes a first slot 8 and a second slot 9, which are located on either side of the slider 4. The first slot 8 and the second slot 9 are both formed on the sidewall of the slider 4. The driving block 5 is mounted in the first slot 8, and the supporting block 6 is mounted in the second slot 9.

[0049] Reference Figure 3 The shock-absorbing connector structure also includes a rubber sleeve 10 and a clamping plate 11. Two rubber sleeves 10 are provided, one of which is mounted on the outside of the support block 6. The other rubber sleeve 10 is mounted on the outside of the drive block 5. The clamping plates 11 are bent at both ends, with one end of the clamping plate 11 abutting the outside of one rubber sleeve 10 and the other end abutting the outside of the other rubber sleeve 10. The clamping plates 11 thus clamp and mount the drive block 5 and support block 6 on the slider 4.

[0050] Reference Figure 1 and Figure 3 To further ensure the sliding stability of the slider 4, a first hole 12 and a second hole 13 are formed through the slider 4. The first hole 12 is connected to the first groove 8, and the first screw rod 38 is disposed in the first hole 12. The second hole 13 is connected to the second groove 9, and the second screw rod 39 is disposed in the second hole 13. A driving hole 14 is formed through the driving block 5 and is connected to the first hole 12. The first screw rod 38 is threadedly connected to the inner wall of the driving hole 14. A supporting hole 15 is formed through the supporting block 6 and is connected to the second hole 13. The second screw rod 39 passes through the supporting hole 15, and the second screw rod 39 and the supporting hole 15 are loosely fitted.

[0051] Reference Figure 1 、 Figure 4 and Figure 5 , in order to further improve the stability of the transmission and reduce the swing of the screw 3. The drive hole 14 includes a threaded hole 16 and a mounting hole 17. The mounting hole 17 is integrally formed at the end of the threaded hole 16, and the threaded hole 16 is threadedly connected to the first screw rod 38. The diameter of the mounting hole 17 is larger than the outer diameter of the first screw rod 38, and a first plastic sleeve 18 is installed in the mounting hole 17, and a gap of 0.05mm is formed between the first plastic sleeve 18 and the first screw rod 38. A second plastic sleeve 19 is also installed in the support hole 15. When the second screw rod 39 passes through the inner cavity of the second plastic sleeve 19, the gap between the second screw rod 39 and the inner wall of the second plastic sleeve 19 is 0.05mm. The support and limitation of the two screws 3 are achieved by the first plastic sleeve 18 and the second plastic sleeve 19.

[0052] In a second aspect, an embodiment of the present application discloses a car seat slide rail.

[0053] Example 1:

[0054] Reference Figure 1 、 Figure 3 and Figure 6 A car seat slide rail includes two slide rail components disclosed in the above-mentioned embodiment, arranged side by side. A mounting seat 24 is mounted on a support component 23, and the mounting seat 24 is used to be fixedly connected to the car seat. The two ends of the mounting seat 24 are respectively fixedly connected to the two sliders 4 in the support component 23. The support component 23 is divided into a first support member 40 and a second support member 41. The seat mounted on the first support member 40 is the front seat, and the seat mounted on the second support member 41 is the rear seat.

[0055] Reference Figure 7 and Figure 8 A wiring harness box 25 is mounted on the side wall of one of the tracks 1. The number of wiring harness boxes 25 is equal to the number of seats. Tank chains 26 are installed within the wiring harness boxes 25, through which the wiring harness for controlling seat adjustment is threaded. One end of the wiring harness is connected to the seat controller, and the other end passes through the tank chain 26 and is connected to the seat control button. When adjusting the seat, pressing the button on the seat causes the seat to move synchronously with the wiring harness connected to the end of the seat. By providing the tank chain 26, the wiring harness extends and retracts within the wiring harness box 25 as the seat moves, reducing the risk of wiring entanglement.

[0056] Reference Figure 7 In order to better ensure that the tank chain 26 moves with the movement of the seat, several guide wheels 27 are provided at the opening of the harness box 25. The several guide wheels 27 form an arc-shaped aisle 28. The free end of the tank chain 26 is embedded in the arc-shaped aisle 28 and is connected to the seat.

[0057] Reference Figure 7 To ensure the strength of track 1, reinforcing ribs 29 are evenly spaced and fixed to the outside of track 1. These ribs reinforce track 1. The ribs 29 extend out of track 1 toward the end of the wiring harness box 25 and bend to form an installation gap 30. Installation gap 30 is located between the wiring harness box 25 and track 1. A slideway 31 is fixed within installation gap 30. This slideway 31 is a U-shaped plate with an upward opening and is fixedly connected to the reinforcing ribs 29. The end of the slideway 31 closest to the opening of the wiring harness box 25 is connected to the wiring harness box 25.

[0058] Reference Figure 7 and Figure 8 The tank chain 26 extends out of the wiring harness box 25 and is embedded in the slide 31. A limit block 32 is fixed at the end of the reinforcement rib 29. The limit block 32 is located above the slide 31, so that the free end of the tank chain 26 can only slide along the length direction of the slide 31.

[0059] Example 2:

[0060] Reference Figure 2 and Figure 9 The difference between the second embodiment and the first embodiment is that a drive rod 33 is rotatably provided on the side of the slider 4 facing the brushless motor 20. The axial direction of the drive rod 33 is perpendicular to the axial direction of the lead screw 3. Both ends of the drive rod 33 are provided with bidirectional threads 37, which are formed by two sections of threads with different rotation directions.

[0061] Reference Figure 1 and Figure 9 At each end of the drive rod 33 are provided a swing limiting member 34, comprising a first arc-limiting plate 35 and a second arc-limiting plate 36. Both the first arc-limiting plate 35 and the second arc-limiting plate 36 are made of plastic. One swing limiting member supports the first screw rod 38, while the other swing limiting member 34 supports the second screw rod 39.

[0062] Reference Figure 2 、 Figure 4 、 Figure 5 and Figure 9 The first limiting arc plate 35 and the second limiting arc plate 36 are both slidably connected to the side wall of the slider 4. In the bidirectional thread 37 at one end, one of the threads is called the forward thread, and the other is called the reverse thread. The first limiting arc plate 35 is threadedly connected to the forward thread, and the second limiting arc plate 36 is threadedly connected to the reverse thread. After long-term use, the lead screw 3 will wear the first plastic sleeve 18 and the second plastic sleeve 19, resulting in poor support. Therefore, by rotating the drive rod 33, the two swing-limiting components 34 respectively support and limit the swing of the two lead screws 3, ensuring the normal use of the lead screw 3.

[0063] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A slide rail assembly, comprising a rail (1), characterized in that: At least two block assemblies (2) slide on the track (1), and a screw (3) is rotated on the track (1) for driving the two block assemblies (2) to move respectively. The screws (3) are provided in two numbers. The block assembly (2) includes a slider (4) sliding on the track (1), a driving block (5) and a support block (6) provided on the slider (4). The driving block (5) on a single slider (4) is threadedly connected to the corresponding screw (3), and the support block (6) on a single slider (4) is slidingly provided with another screw (3). The slider (4) is also provided with a shock-absorbing connection structure for installing the driving block (5) and the support block (6). A driving assembly (7) for driving the screw (3) to rotate is provided at the end of the track (1); The shock-absorbing connection structure comprises a first groove (8) provided on the side wall of the slider (4) for embedding the driving block (5), a second groove (9) for embedding the supporting block (6), a rubber sleeve (10) respectively sleeved on the outside of the driving block (5) and the supporting block (6), and a clamping plate (11) clamped on the two rubber sleeves (10); the slider (4) is provided with a first hole (12) for passing through one of the lead screws (3); the slider (4) is also provided with a second hole (13) for passing through the other lead screw (3); the driving block (5) is provided with a driving hole (14) connected to the first hole (12); the supporting block (6) is provided with a supporting hole (15) connected to the second hole (13); one of the lead screws (3) passes through the driving hole (14) and is threadedly connected to the driving block (5); the other lead screw (3) passes through the supporting hole (15) and is clearance-matched with the supporting block (6); The driving hole (14) includes a threaded hole (16) and a mounting hole (17) integrally formed at one end of the threaded hole (16); the inner diameter of the mounting hole (17) is larger than the inner diameter of the threaded hole (16); a first plastic sleeve (18) for supporting and limiting the swing of the lead screw (3) is installed in the mounting hole (17); and a second plastic sleeve (19) for supporting and limiting the swing of the other lead screw (3) is also installed in the supporting hole (15); The block assemblies (2) are arranged in four numbers, and two adjacent block assemblies (2) form a support component (23), wherein one lead screw (3) is used to drive one of the support components (23) to move, and the other lead screw (3) is used to drive the other support component (23) to move; The two slide rail components are arranged in parallel, and a mounting seat (24) is installed above the support component (23), and the ends of the mounting seat (24) are fixedly connected to the two sliders (4) respectively; A driving rod (33) is rotatably provided on the side wall of the slider (4), and limited swing components (34) are respectively provided at both ends of the driving rod (33). The limited swing components (34) include a first limiting arc plate (35) and a second limiting arc plate (36) sliding on the side wall of the slider (4). Both ends of the driving rod (33) are provided with bidirectional threads (37). The first limiting arc plate (35) and the second limiting arc plate (36) are arranged opposite to each other and are threadedly connected to the bidirectional threads (37) at the same end. The thread rotation directions of the first limiting arc plate (35) and the second limiting arc plate (36) are opposite to each other. The drive assembly (7) comprises a brushless motor (20) arranged at the end of a lead screw (3), and a flexible square shaft (21) coaxially fixed to the end of a rotating shaft of the brushless motor (20); the brushless motor (20) is fixedly mounted on the end of a track (1); a square groove (22) is formed at one end of the lead screw (3) facing the brushless motor (20), and the square shaft is inserted into the square groove (22).

2. A car seat slide rail, characterized by: The invention comprises two slide rail components as claimed in claim 1, wherein a wiring harness box (25) is provided on one of the slide rail components, the wiring harness box (25) is provided on one side of the track (1), a tank chain (26) is installed in the wiring harness box (25), a wiring harness is passed through the tank chain (26), one end of the wiring harness is connected to the seat button, and the other end is connected to the seat controller.

3. The car seat slide rail according to claim 2, characterized in that: A plurality of guide wheels (27) are provided at the opening of the harness box (25), and the guide wheels (27) form an arc-shaped passage (28) for the sliding of the tank chain (26), and reinforcing ribs (29) are evenly fixed on the upper portion of the track (1).

4. The automobile seat slide rail according to claim 3, characterized in that: The reinforcing rib (29) is bent toward one end of the harness box (25) to form an installation gap (30), and the installation gap (30) is located between the harness box (25) and the track (1). A slideway (31) is fixed in the installation gap (30), and a limit block (32) is fixed at the end of the reinforcing rib (29), and the limit block (32) is located above the slideway (31).

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