Unlocking mechanism for sliding rail and vehicle seat comprising unlocking mechanism

Abstract

The invention relates to an unlocking mechanism for a sliding rail and a vehicle seat comprising the unlocking mechanism, the sliding rail comprises a lower rail and an upper rail, and the upper rail has a locking state in which the upper rail is locked on the lower rail and an unlocking state in which the upper rail is unlocked with the lower rail through the unlocking mechanism so as to be capable of sliding relative to the lower rail. The unlocking mechanism comprises an operating rod and an unlocking rod, the operating rod comprises an operating part used for being pulled by a user, and the unlocking rod is connected with the operating rod in a hinged mode; the unlocking mechanism is configured to enable the operating rod to drive the unlocking rod to rotate so as to trigger unlocking of the upper rail and the lower rail when the operating part is subjected to upward first unlocking force, and enable the operating rod to independently rotate relative to the unlocking rod when the operating part is subjected to downward pressure. The unlocking mechanism not only adapts to the seat with the sunken seat cushion, but also can meet the comfort requirement of a user for unlocking operation.

Description

Technical Field

[0001] This invention relates to the field of vehicle component technology. More specifically, this invention relates to an unlocking mechanism for a slide rail and a vehicle seat including the same. Background Technology

[0002] The vehicle seat includes a seat frame, slide rails, and an unlocking mechanism. The slide rails consist of a lower rail and an upper rail. The lower rail is fixedly connected to the vehicle floor. The upper rail has a locked state where it is locked to the lower rail, and an unlocked state where it can slide back and forth relative to the lower rail via the unlocking mechanism. The upper rail is also fixedly connected to the seat frame. The unlocking mechanism includes an operating lever. The user can unlock the upper and lower rails by pulling the lever, thereby adjusting the seat's fore-and-aft position within the passenger compartment by moving the upper rail relative to the lower rail.

[0003] Some vehicles feature recessed rear seats, where the backrests fold forward and over the seat cushion, causing the cushion to drop downwards to increase cargo space. However, this downward movement can interfere with the unlocking mechanism's lever, making existing unlocking mechanisms difficult to apply to recessed seats. Even when used, the lever's operating part needs to be positioned very low to accommodate the recessed seat, making unlocking difficult and inconsistent with comfort and ergonomics. Summary of the Invention

[0004] The purpose of this invention is to provide an unlocking mechanism for a sliding rail, which is not only suitable for recessed seats, but also meets the user's comfort requirements for unlocking operations.

[0005] To this end, a first aspect of the present invention provides an unlocking mechanism for a slide rail, the slide rail including a lower rail and an upper rail, the upper rail having a locked state locked to the lower rail and an unlocked state unlocked relative to the lower rail by means of the unlocking mechanism, wherein the unlocking mechanism includes an operating lever and an unlocking lever, the operating lever including an operating part for a user to pull, the unlocking lever being hinged to the operating lever, wherein the unlocking mechanism is configured such that when the operating part is subjected to an upward first unlocking force, the operating lever can drive the unlocking lever to rotate to trigger the unlocking of the upper rail and the lower rail, and when the operating part is subjected to a downward pressure, the operating lever can rotate independently relative to the unlocking lever.

[0006] Based on the above-described technical concept, the present invention may further include any one or more of the following optional forms.

[0007] In some alternative forms, the operating lever includes a pair of connecting portions extending from both ends of the operating part, and the unlocking lever includes a pair of connecting rods fixedly connected to each other by a first synchronizing rod, the pair of connecting rods being hinged to the pair of connecting portions respectively.

[0008] In some alternative forms, each connecting part includes a first abutment and each connecting rod includes a second abutment, wherein the unlocking mechanism is configured to hold each first abutment against a corresponding second abutment when the operating part is subjected to the first unlocking force so that the operating rod can push the unlocking rod to rotate, and to separate each first abutment from the corresponding second abutment when the operating part is subjected to the pressure.

[0009] In some alternative forms, one of the first abutting portion and the second abutting portion is provided with a first damping element to absorb abnormal noise when it impacts and abuts with the other of the first abutting portion and the second abutting portion.

[0010] In some alternative forms, the unlocking mechanism further includes at least one first reset spring, one end of which is connected to a connecting portion and the other end to a corresponding connecting rod, to drive the operating rod to rotate and reset when the pressure is released.

[0011] In some alternative forms, the unlocking mechanism further includes a pair of support seats for fixed connection with the upper rail, with the two ends of the first synchronizing rod respectively connected to the pair of support seats, and capable of rotating the first synchronizing rod around its central axis when the operating part is subjected to the first unlocking force.

[0012] In some alternative forms, the unlocking mechanism further includes at least one second return spring, one end of which is connected to a connecting rod and the other end to a corresponding support, to drive the unlocking rod to rotate and reset when the first unlocking force is released.

[0013] In some alternative forms, the unlocking lever further includes a pair of trigger levers fixedly connected to each other via a second synchronizing lever, the pair of trigger levers being connected to the first synchronizing lever or the pair of connecting levers and used to trigger the unlocking of the upper rail and the lower rail.

[0014] In some alternative configurations, each trigger lever is fixedly connected to the first synchronizing lever adjacent to its corresponding connecting lever, or each trigger lever is fixedly connected to its corresponding connecting lever.

[0015] In some alternative configurations, each trigger lever is connected to the first synchronizing lever adjacent to its corresponding connecting lever and is capable of rotating independently around the first synchronizing lever when subjected to a second unlocking force to trigger the unlocking of the upper rail and the lower rail.

[0016] In some alternative forms, each connecting rod includes a third abutment and each trigger rod includes a fourth abutment, wherein the unlocking mechanism is configured to hold each third abutment against the corresponding fourth abutment when the operating part is subjected to the first unlocking force, so that each connecting rod can push the corresponding trigger rod to rotate.

[0017] In some alternative forms, one of the third and fourth abutting portions is provided with a second damping element to absorb abnormal noise when it impacts and abuts with the other of the third and fourth abutting portions.

[0018] In some alternative forms, the unlocking mechanism further includes at least one third reset spring, one end of which is connected to a trigger rod and the other end to a corresponding connecting rod or for connection to the upper rail, so as to drive each trigger rod to rotate and reset when the second unlocking force is released.

[0019] In some alternative forms, the unlocking mechanism further includes a pull cord connected to a trigger lever and used to be pulled to provide the second unlocking force.

[0020] A second aspect of the invention provides a vehicle seat, including a seat frame, a lower rail, an upper rail, and an unlocking mechanism according to a first aspect of the invention, the seat frame including a cushion frame that is vertically and elliptically connected to the upper rail via a linkage and a push rod connected to the linkage, so as to provide the pressure to the operating part via the push rod when the cushion frame is lowered.

[0021] In some alternative forms, the lower rail includes a first locking portion, the upper rail includes a second locking portion capable of engaging with the first locking portion and an unlocking pin connected to the second locking portion, and the unlocking lever includes a trigger protrusion for pushing the unlocking pin to move, thereby causing the second locking portion to separate from the first locking portion.

[0022] In some alternative forms, the trigger protrusion is provided with a third damping element for impacting and abutting against the unlocking pin.

[0023] The unlocking mechanism for slide rails according to the present invention has several beneficial technical effects, especially: by setting the operating rod of the unlocking mechanism to be hinged to the unlocking rod, when unlocking is not required by using the operating rod, the operating end of the operating rod can rotate independently downward relative to the unlocking rod. Therefore, the unlocking mechanism can not only be adapted to seats with sinking cushions, that is, provide clearance for the sinking of the cushion, but also avoid setting the operating part of the operating rod in a very low position, thus meeting the user's operating comfort requirements. Attached Figure Description

[0024] Other features and advantages of the invention will be better understood through the following detailed description of preferred embodiments in conjunction with the accompanying drawings. In the drawings, the same reference numerals denote the same or similar parts.

[0025] Figure 1A This is a perspective view of a vehicle seat, showing the seat frame, slide rails, and a first embodiment of the unlocking mechanism according to the invention.

[0026] Figure 1B This is a schematic diagram of the assembly of the unlocking mechanism and the slide rail.

[0027] Figure 2A and Figure 2B These are a 3D view and an exploded view of the unlocking mechanism.

[0028] Figure 3A yes Figure 2A A magnified view of region A in the image.

[0029] Figure 3B This is an enlarged view of the unlocking mechanism at the location of the second damping element.

[0030] Figure 3C and Figure 3D They are Figure 2A Enlarged views of regions B and C in the image.

[0031] Figure 3E This is an enlarged schematic diagram of the second damping element installed on the connecting rod.

[0032] Figure 4 This is a schematic diagram of the unlocking operation of the unlocking mechanism under the first working condition.

[0033] Figure 5A and Figure 5B These are schematic diagrams of the unlocking mechanism in the locked state under the first working condition, namely, a schematic diagram of its principle and a schematic diagram of its structure.

[0034] Figure 6A and Figure 6B These are schematic diagrams of the unlocking mechanism in the unlocked state under the first working condition, namely, a simplified principle diagram and a simplified structural diagram.

[0035] Figure 7 This is a side view of the unlocking mechanism with the trigger lever in its initial position during the unlocking process.

[0036] Figure 8A and Figure 8B These are a side view and a perspective view of the unlocking mechanism with the trigger lever in the middle position during the unlocking process.

[0037] Figure 9A and Figure 9BThese are a side view and a perspective view of the unlocking mechanism with the trigger lever in the unlocked position during the unlocking process.

[0038] Figures 10A to 10D This is a schematic diagram of the forward folding process of the seat back frame in the vehicle.

[0039] Figure 10E This is a schematic diagram of the unlocking mechanism under the second working condition.

[0040] Figures 11A to 11C These are schematic diagrams from various perspectives showing how the operating lever of the unlocking mechanism is pushed by the push rod of the seat frame.

[0041] Figure 12A and Figure 12B These are schematic diagrams of the unlocking mechanism in its design state under the second working condition, representing both the principle and the structure.

[0042] Figure 13A and Figure 13B These are schematic diagrams of the unlocking mechanism in the second working condition, showing the backrest flattened and locked.

[0043] Figure 14A and Figure 14B These are schematic diagrams of the unlocking mechanism in the second working condition, showing the backrest flattened and unlocked.

[0044] Figure 15A and Figure 15B These are a schematic diagram of the unlocking mechanism in the third working condition and a simplified diagram of the unlocking process principle.

[0045] Figure 16A and Figure 16B These are schematic diagrams of the unlocking mechanism in its design state under the third working condition, including both a principle diagram and a structural diagram.

[0046] Figure 17A and Figure 17B These are schematic diagrams of the unlocking mechanism in the unlocked state under the third working condition, representing both the principle and the structure.

[0047] Figure 18A and Figure 18B This is a schematic diagram of the spatial avoidance effect of the unlocking mechanism, in which the seat cushion is in the sitting position and the sunken position respectively.

[0048] Figure 19 This is a schematic diagram of the unlocking mechanism when the backrest is in the flat position.

[0049] Figure 20 This is a perspective view of a second embodiment of the unlocking mechanism according to the present invention.

[0050] The elements in the accompanying drawings are shown for simplicity and clarity and are not necessarily drawn to exact scale. It should be understood that these drawings are not only for explaining and illustrating the invention, but also, where necessary, for defining the invention. Detailed Implementation

[0051] The implementation and use of specific embodiments are discussed in detail below. However, it should be understood that the specific embodiments discussed are merely illustrative of particular ways of implementing and using the invention, and are not intended to limit the scope of the invention.

[0052] In this specification, the descriptions of structural positions, such as up, down, front, and rear, are not absolute but relative, and are specifically defined with reference to the position of each component in the vehicle. These directional descriptions are appropriate when the components are positioned as shown in the figures, but should be changed accordingly when the positions of the components change.

[0053] In this specification, unless otherwise expressly specified and limited, terms such as "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this specification according to the specific circumstances.

[0054] like Figure 1A and Figure 1B As shown, the vehicle seat includes a slide rail disposed on the vehicle floor, a seat frame mounted to the slide rail, and an unlocking mechanism 100. More specifically, the slide rail includes a lower rail 210 and an upper rail 220. The lower rail 210 is fixedly connected to the vehicle floor, and the upper rail 220 has a locked state that is locked to the lower rail 210 to remain stationary with respect to the lower rail 210, and an unlocked state that is unlocked by the unlocking mechanism 100 to allow it to slide back and forth relative to the lower rail 210. The seat frame includes a backrest frame 310, a seat cushion frame 320, a pair of links 330, a pair of brackets 340, and a push rod 350. The backrest frame 310 is hinged to the seat cushion frame 320 to allow it to flip forward and backward relative to the seat cushion frame 320 and fold over the seat cushion frame 320. The upper end of each link 330 is hinged to the bottom of the seat cushion frame 320, and the lower end is hinged to the corresponding bracket 340. Each bracket 340 is fixedly connected to the upper rail 220 by screws 221, thereby allowing the seat cushion frame 320 to be vertically and vertically connected to the upper rail 220 via the pair of links 330. The push rod 350 is fixedly connected between the pair of links 330, and its function will be described in detail below. Therefore, when the upper rail 220 is in the unlocked state, the seat frame can move with the upper rail 220 relative to the lower rail 210 to adjust the fore-and-aft position of the seat in the passenger compartment.

[0055] like Figures 2A to 3E As shown, according to the first embodiment, the unlocking mechanism 100 includes an operating lever 110, an unlocking lever, and a pair of support seats 160. The operating lever 110 is for pulling by a user, and the unlocking lever is supported on the pair of support seats 160 and connected to the operating lever 110 to trigger the unlocking of the upper rail 220 and the lower rail 210. The pair of support seats 160 are fixedly connected to the upper rail 220, for example, by a first rivet 222 (see reference). Figure 1B More specifically, the operating lever 110 includes a generally U-shaped operating portion 111 for the user to pull and a pair of connecting portions 112 extending rearward from both ends of the operating portion 111. The unlocking lever includes a pair of connecting rods 120 fixedly connected to each other via a first synchronizing rod 140 and a pair of triggering rods 130 fixedly connected to each other via a second synchronizing rod 150 for triggering unlocking. The front ends of the pair of connecting rods 120 are hinged to the rear ends of the pair of connecting portions 112 of the operating lever 110, and the front end of each triggering rod 130 is hinged to the first synchronizing rod 140 adjacent to the corresponding connecting rod 120. The first synchronizing rod 140 is rotatably connected to a pair of support seats 160. For example, as... Figure 3C and Figure 3D As shown, the two ends 141 of the first synchronizing rod 140 are respectively engaged in the engaging grooves 161 formed on a pair of support seats 160, and can rotate about its own central axis relative to the pair of support seats 160.

[0056] like Figure 2B and Figure 3A As shown, each connecting rod 120 has a first opening 121 at its front end, allowing it to be hinged to the corresponding connecting portion 112 of the operating rod 110 via a second rivet 122 and a bushing 123 passing through the first opening 121. Furthermore, each connecting portion 112 includes a first abutting portion 113 located behind the second rivet 122, which is the lower edge of the connecting portion 112 in this embodiment, and each connecting rod 120 includes a second abutting portion 124 located behind the second rivet 122, which is the bottom bent flange 124 of the connecting rod 120 in this embodiment. When the operating portion 111 of the operating rod 110 is rotated by an upward first unlocking force (i.e., the user's pulling force), each first abutting portion 113 remains abutting against the corresponding second abutting portion 124, allowing the rotation of the operating rod 110 to drive each connecting rod 120 to rotate and cause the first synchronizing rod 140 to rotate around its central axis. When the operating part 111 is subjected to downward pressure, each first abutment part 113 separates from the corresponding second abutment part 124, allowing the operating lever 110 to rotate independently relative to each connecting rod 120 about the axis of the second rivet 122.

[0057] The present invention does not limit the specific construction of the first abutting part 113 and the second abutting part 124. Preferably, one of the first abutting part 113 and the second abutting part 124 is provided with a first damping element, such as a rubber pad, for absorbing the impact energy and abnormal noise generated when it impacts and abuts with the other of the first abutting part 113 and the second abutting part 124. Figure 2B and Figure 3A As shown, the unlocking mechanism 100 preferably also includes at least one first return spring 171, such as the pair of first return springs 171 shown, one end of each first return spring 171 being connected to a first limiting hole 114 at the rear end of a corresponding connecting portion 112 of the operating lever 110 and the other end being connected to a second limiting hole 125 at the front end of a corresponding connecting lever 120, so as to drive the operating lever 110 to rotate and reset when the downward pressure applied to the operating portion 111 is released. Figure 3D As shown, the unlocking mechanism 100 also preferably includes at least one second reset spring 172, one end of which is connected to the first limiting groove 126 at the rear end of one of the connecting rods 120 and the other end is connected to the second limiting groove 162 on the corresponding support 160, so as to drive a pair of connecting rods 120 and the first synchronizing rod 140 to rotate and reset when the upward first unlocking force applied to the operating part 111 is released.

[0058] like Figure 2B As shown, each trigger rod 130 has a second opening 131 at its front end, and a first synchronizing rod 140 passes through the second opening 131 of each trigger rod 130 and is hinged to the trigger rod 130. Furthermore, as... Figures 3B to 3D As shown, each connecting rod 120 includes a third abutment portion 127 located in front of the first synchronizing rod 140, which is the upper edge of the connecting rod 120 in this embodiment. Each trigger rod 130 includes a fourth abutment portion 132 located in front of the first synchronizing rod 140, which is the top bent flange 132 of the trigger rod 130 in this embodiment. When the operating part 111 of the operating rod 110 is subjected to an upward first unlocking force, each third abutment portion 127 remains abutted against the corresponding fourth abutment portion 132, allowing the rotation of each connecting rod 120 to drive the corresponding trigger rod 130 to rotate, thereby triggering the unlocking of the upper rail 220 and the lower rail 210. When it is impossible to apply an upward first unlocking force to the operating part 111 to rotate the connecting rod 120, a second unlocking force can be directly applied to at least one trigger rod 130 to cause each trigger rod 130 to rotate independently around the first synchronizing rod 140, thereby triggering the unlocking of the upper rail 220 and the lower rail 210. Specific unlocking conditions will be described in detail below with reference to the accompanying drawings.

[0059] The present invention does not limit the specific construction of the third abutment portion 127 and the fourth abutment portion 132. Preferably, one of the third abutment portion 127 and the fourth abutment portion 132 is provided with a second damping member 181 to absorb the impact energy and abnormal noise generated when it collides and abuts with the other of the third abutment portion 127 and the fourth abutment portion 132. For example, the second damping member 181 is... Figures 3B to 3E The rubber rings shown, fitted onto the body of each connecting rod 120, are used to absorb the impact energy between each connecting rod 120 and its corresponding trigger rod 130 or support base 10, thereby reducing noise. Figure 3C As shown, the unlocking mechanism 100 also includes at least one third return spring 173, one end of which is connected to the third limiting hole 134 of one of the trigger rods 130 and the other end is connected to the third limiting groove 163 on the corresponding support 160 (i.e., connected to the upper rail 220), so as to drive each trigger rod 130 to rotate and reset when the second unlocking force is released. According to one embodiment, the other end of the third return spring 173 may also be connected to the corresponding connecting rod 120.

[0060] Figures 4 to 9B The first operating condition of the unlocking mechanism 100 according to the first embodiment is shown. When a user is normally seated in the vehicle, the unlocking mechanism 100 is in the following position: Figure 5A and Figure 5B In the locked state shown, the upper rail 220 is locked to the lower rail 210 and remains stationary relative to the lower rail 210, preventing the seat frame from moving back and forth within the carriage. When the user needs to adjust the seat's position in the carriage, the user can do so as follows: Figure 4 As shown, pulling the operating lever 110 upward applies an upward first unlocking force F1 to the operating part 111 of the operating lever 110 (reference). Figure 6A As mentioned earlier, since each first abutment portion 113 of the operating lever 110 remains abutted against the second abutment portion 124 of the corresponding connecting lever 120, rotation of the operating lever 110 can drive rotation of each connecting lever 120. Furthermore, since the third abutment portion 127 of each connecting lever 120 remains abutted against the fourth abutment portion 132 of the corresponding trigger lever 130, rotation of each connecting lever 120 can drive rotation of the corresponding trigger lever 130 until the unlocking mechanism 100 reaches the desired position. Figure 6A and Figure 6B The unlocked state shown triggers the unlocking of the upper rail 220 and the lower rail 210. When the user releases the operating lever 110, the second reset spring 172 can drive each connecting lever 120 and the operating lever 110 to rotate and reset, and the third reset spring 173 can drive each trigger lever 130 to rotate and reset.

[0061] Figures 7 to 9BThe unlocking process of the trigger lever 130 of the unlocking mechanism 100 is shown. As illustrated in these figures, in this embodiment, the lower rail 210 includes a first locking portion 211, i.e., the rack shown, the upper rail 220 includes a second locking portion 223 capable of locking with the first locking portion 211, i.e., the toothed plate shown, and includes an unlocking pin 224 connected to the second locking portion 223, and each trigger lever 130 includes a trigger protrusion 133 (see reference). Figure 2B The trigger protrusion 133 is used to impact and push the unlocking pin 224 up and down, thereby causing the second locking part 223 to separate from the first locking part 211 to achieve unlocking. The trigger protrusion 133 is preferably provided with a third damping element 182, such as a rubber sleeve, for impacting and abutting against the unlocking pin 224 to absorb impact energy and reduce noise. During the unlocking process, when the trigger rod 130 is in the position shown... Figure 7 In the initial position shown, the trigger protrusion 133 and the third damping element 182 are separated from the unlocking pin 224 by a distance, and the upper end is limited by the limiting plate 164 fixed on the support base 160, so that the trigger rod 130 cannot rotate upward; when the trigger rod 130 rotates to the ... Figure 8A and Figure 8B At the intermediate position shown, the third damping element 182 strikes the top of the unlocking pin 224 and begins to push the unlocking pin 224 downward; when the trigger lever 130 rotates to the position shown... Figure 9A and Figure 9B When the unlocked position (i.e., the lowest position) is shown, the trigger protrusion 133 and the third damping member 182 push the unlocking pin 224 to the lowest position, thereby causing the second locking part 223 of the upper rail 220 to separate from the first locking part 211 of the lower rail 210, thus unlocking the upper rail 220 and the lower rail 210. In addition, the upper rail 220 also includes a spring 225, one end of which is connected to the support base 160 and the other end is connected to the second locking part 223, so that when the unlocking force is released, it can drive the unlocking pin 224 to return upward and cause the second locking part 223 to relock with the first locking part 211.

[0062] Figures 10A to 14B The second operating condition of the unlocking mechanism 100 of the first embodiment is shown. During the forward folding process of the backrest frame 310, the backrest frame 310 can be unlocked from... Figure 10A The design shown flips the seating position forward to... Figure 10B The first seat shown; then flipped over to Figure 10C As shown in the forward tilt position, in this position, the seat frame 320 begins to sink, and the push rod 350 begins to... Figure 11A The operating part 111 of the downward operating lever 110 is shown; until the backrest frame 310 is finally flipped to Figure 10D The folded position shown is approximately horizontal above the seat cushion frame 320, in which the operating lever 110 is as follows: Figure 11B and Figure 11C As shown, the push rod 350 is pressed down to its lowest position (the push rod 350 is in...). Figure 11B (Seen in dashed lines), but it can maintain a safe clearance with the vehicle floor to allow for the seat frame to move back and forth. When the operating lever 110 is pressed down due to the sinking of the seat cushion frame 320, the user cannot unlock the upper rail 220 and lower rail 210 by pulling the operating lever 110 upwards, but a second unlocking force can be applied to one of the trigger levers 130 by a drive component on the rear side of the seat, causing each trigger lever 130 to rotate independently downwards about the first synchronizing rod 140, thereby triggering the unlocking of the upper rail 220 and lower rail 210 without affecting the operating lever 110 and the connecting rod 120. The drive component is, for example, Figure 10E The pull cord 190 shown in this embodiment has a third opening 135 on the trigger rod 130 (see reference). Figure 3C and Figure 3D One end of the pull cord 190 is connected to the third opening 135 and the other end extends from the rear side of the seat frame for the user to pull. The seat frame also includes a limit frame 360. The pull cord 190 passes through the limit frame 160 so that the section 191 of the pull cord 190 located in front of the limit frame 360 ​​extends downward from front to back, thereby causing the pull cord 190 to rotate the trigger lever 130 downward when the user pulls the pull cord 190.

[0063] More specifically, when the backrest frame 310 is in Figure 10A or Figure 10B When in the indicated seating position, the unlocking mechanism 100 is in the position as shown. Figure 12A and Figure 12B In the design configuration shown, the upper rail 220 is thus locked to the lower rail 210 to remain stationary relative to the lower rail 210, preventing the seat frame from moving back and forth within the carriage. When it is necessary to move the backrest frame 310 as shown... Figure 10D When the seat is folded above the seat frame 320 to increase the trunk storage space, the downward movement of the seat frame 320 causes the push rod 350 to apply downward pressure F2 to the operating lever 110, which can cause the unlocking mechanism 100 to reach the desired position. Figure 13A and Figure 13B The backrest is shown in the flat and locked position. In this state, when the user needs to adjust the seat's fore-and-aft position in the cabin, the user can do so as follows: Figure 10E As shown, pulling the pull cord 190 backward applies a second unlocking force F3 to the trigger lever 130, causing the pull cord 190 to rotate the trigger lever 130 downward until the unlocking mechanism 100 reaches the desired position. Figure 14A and Figure 14BThe backrest is shown in a flattened and unlocked state to trigger the unlocking of the upper rail 220 and the lower rail 210. When the user releases the pull cord 190, the third return spring 173 can drive each trigger lever 130 to rotate and reset; and when the seat frame 320 rises back to the sitting position, the first return spring 171 can drive the operating lever 110 to rotate and reset.

[0064] Figures 15A to 17B The third operating condition of the unlocking mechanism 100 of the first embodiment is shown. When the seat frame 320 is not depressed, the same operation can be performed. Figure 15A and Figure 15B As shown, a second unlocking force is applied to the trigger lever 130 via the pull cord 190 on the rear side of the seat, causing the trigger lever 130 to rotate independently downward around the first synchronizing lever 140, thereby triggering the unlocking of the upper rail 220 and the lower rail 210 without affecting the operating lever 110 and the connecting lever 120. More specifically, when the backrest frame 310 and the seat cushion frame 320 are in the sitting position, the unlocking mechanism 100 is in the position as shown in the diagram. Figure 16A and Figure 16B In the design configuration shown, the upper rail 220 is locked to the lower rail 210 to remain stationary relative to the lower rail 210, preventing the seat frame from moving forward or backward within the carriage. In this configuration, when the user needs to adjust the seat's forward or backward position within the carriage, the user can pull the pull cord 190 backward to apply a second unlocking force F3 to the trigger lever 130, causing the pull cord 190 to rotate the trigger lever 130 downward until the unlocking mechanism 100 reaches the desired position. Figure 17A and Figure 17B The unlocked state shown triggers the unlocking of the upper rail 220 and the lower rail 210. When the user releases the pull cord 190, the third reset spring 173 can drive each trigger lever 130 to rotate and reset.

[0065] Therefore, this unlocking mechanism 100 is particularly suitable for seats with recessed cushions. For example, according to one embodiment, when the cushion CU is in the position of... Figure 18A In the indicated seating position, the distance D1 between the top of the seat cushion CU and the vehicle floor is approximately 310 mm, and the distance D2 between the top of the operating lever 110 and the vehicle floor is approximately 126 mm; when the seat cushion CU is lowered to the position shown... Figure 18BAt the lowest position shown, when the distance D1' between the top of the seat CU and the vehicle floor decreases to approximately 163mm, the operating lever 110 is pressed down by the push rod 350 until the distance D2' between the top of the operating lever 110 and the vehicle floor decreases to approximately 58mm, while the connecting rod 120 and the trigger rod 130 remain stationary. In other words, the downward movement of the operating lever 110 provides a maximum of 68mm of vertical clearance for the seat CU to sink; when the seat CU rises back to the seating position, the operating lever 110 can automatically return to its original position. This design also avoids placing the operating part 111 of the operating lever 110 in a very low position, meeting the user's requirements for unlocking comfort. Furthermore, as... Figure 19 As shown, when the backrest BR is folded above the seat cushion CU and the seat cushion CU is lowered, the user cannot unlock the seat by pulling the operating lever 110. However, the user can pull the pull cord 190 on the back of the seat to cause the trigger lever 130 to rotate downward independently of the operating lever 110 and the connecting rod 120, thereby triggering the unlocking of the upper rail 220 and the lower rail 210.

[0066] Figure 20 A second embodiment of the unlocking mechanism 100 is shown, differing from the first embodiment in that each trigger rod 130 is fixedly connected to the first synchronizing rod 140 adjacent to its corresponding connecting rod 120, for example, by welding; that is, each trigger rod 130 cannot rotate relative to the first synchronizing rod 140. According to a variation, each trigger rod 130 may also be fixedly connected to its corresponding connecting rod 120, meaning a pair of trigger rods 130 are fixedly connected to a pair of connecting rods 120 adjacent to both ends of the first synchronizing rod 140. Compared to the first embodiment, the unlocking mechanism 100 of this second embodiment can also provide vertical clearance space for the sinking of the seat cushion by moving the operating rod 110 downwards, but it cannot unlock the upper rail 220 and lower rail 210 by rotating the trigger rod 130 downwards independently of the operating rod 110 and connecting rod 120. It is understood that the unlocking mechanism 100 of this second embodiment therefore does not require the aforementioned third return spring 173.

[0067] The technical content and features of the present invention have been disclosed above. However, it is understood that under the creative concept of the present invention, those skilled in the art can make various flexible changes and improvements to the above-disclosed concept, but all of them fall within the protection scope of the present invention.

[0068] The above description of the embodiments is exemplary and not restrictive, and the scope of protection of the present invention is determined by the claims.

Claims

1. An unlocking mechanism for a slide rail, the slide rail comprising a lower rail (210) and an upper rail (220), the upper rail (220) having a locked state locked to the lower rail (210) and an unlocked state unlocked by the unlocking mechanism (100) to the lower rail (210) so as to be able to slide relative to the lower rail (210). Its features are, The unlocking mechanism (100) includes an operating lever (110) and an unlocking lever. The operating lever (110) includes an operating part (111) for the user to pull. The unlocking lever is hinged to the operating lever (110). The unlocking mechanism (100) is configured such that when the operating part (111) is subjected to an upward first unlocking force, the operating lever (110) can drive the unlocking lever to rotate to trigger the unlocking of the upper rail (220) and the lower rail (210), and when the operating part (111) is subjected to a downward pressure, the operating lever (110) can rotate independently relative to the unlocking lever.

2. The unlocking mechanism according to claim 1, characterized in that, The operating lever (110) includes a pair of connecting portions (112) extending from both ends of the operating part (111), and the unlocking lever includes a pair of connecting rods (120) fixedly connected to each other via a first synchronizing rod (140), and the pair of connecting rods (120) are respectively hinged to the pair of connecting portions (112).

3. The unlocking mechanism according to claim 2, characterized in that, Each connecting part (112) includes a first abutment part (113), and each connecting rod (120) includes a second abutment part (124), wherein the unlocking mechanism (100) is configured to hold each first abutment part (113) against the corresponding second abutment part (124) when the operating part (111) is subjected to the first unlocking force so that the operating rod (110) can push the unlocking rod to rotate, and to separate each first abutment part (113) from the corresponding second abutment part (124) when the operating part (111) is subjected to the pressure.

4. The unlocking mechanism according to claim 2, characterized in that, The unlocking mechanism (100) further includes at least one first reset spring (171), one end of which is connected to a connecting part (112) and the other end is connected to a corresponding connecting rod (120) to drive the operating rod (110) to rotate and reset when the pressure is released.

5. The unlocking mechanism according to claim 2, characterized in that, The unlocking mechanism (100) further includes a pair of support seats (160) for fixed connection with the upper rail (220). The two ends of the first synchronizing rod (140) are respectively connected to the pair of support seats (160), and the first synchronizing rod (140) can be driven to rotate around its central axis when the operating part (111) is subjected to the first unlocking force.

6. The unlocking mechanism according to claim 5, characterized in that, The unlocking mechanism (100) further includes at least one second reset spring (172), one end of which is connected to a connecting rod (120) and the other end is connected to a corresponding support (160) to drive the unlocking rod to rotate and reset when the first unlocking force is released.

7. The unlocking mechanism according to claim 2, characterized in that, The unlocking lever also includes a pair of trigger levers (130) fixedly connected to each other via a second synchronizing lever (150). The pair of trigger levers (130) are connected to the first synchronizing lever (140) or the pair of connecting levers (120) and are used to trigger the unlocking of the upper rail (220) and the lower rail (210).

8. The unlocking mechanism according to claim 7, characterized in that, Each trigger rod (130) is fixedly connected to the first synchronization rod (140) adjacent to the corresponding connecting rod (120), or each trigger rod (130) is fixedly connected to the corresponding connecting rod (120).

9. The unlocking mechanism according to claim 7, characterized in that, Each trigger rod (130) is connected to the first synchronizing rod (140) adjacent to the corresponding connecting rod (120) and can rotate independently around the first synchronizing rod (140) when subjected to a second unlocking force to trigger the unlocking of the upper rail (220) and the lower rail (210).

10. The unlocking mechanism according to claim 9, characterized in that, Each connecting rod (120) includes a third abutment (127), and each trigger rod (130) includes a fourth abutment (132), wherein the unlocking mechanism (100) is configured to hold each third abutment (127) against the corresponding fourth abutment (132) when the operating part (111) is subjected to the first unlocking force so that each connecting rod (120) can push the corresponding trigger rod (130) to rotate.

11. The unlocking mechanism according to claim 9, characterized in that, The unlocking mechanism (100) further includes at least one third reset spring (173), one end of which is connected to a trigger rod (130) and the other end is connected to a corresponding connecting rod (120) or for connection to the upper rail (220) to drive each trigger rod (130) to rotate and reset when the second unlocking force is released.

12. The unlocking mechanism according to claim 9, characterized in that, The unlocking mechanism (100) also includes a pull cord (190) which is connected to a trigger rod (130) and is used to be pulled to provide the second unlocking force.

13. A vehicle seat, characterized in that, The device includes a seat frame, a lower rail (210), an upper rail (220), and an unlocking mechanism according to any one of claims 1 to 12. The seat frame includes a cushion frame (320) that is vertically and vertically connected to the upper rail (220) via a link (330) and a push rod (350) connected to the link (330) to provide the pressure to the operating unit (111) via the push rod (350) when the cushion frame (320) is lowered.

14. The vehicle seat according to claim 13, characterized in that, The lower rail (210) includes a first locking part (211), the upper rail (220) includes a second locking part (223) that can be locked with the first locking part (211) and an unlocking pin (224) connected to the second locking part (223), and the unlocking rod includes a trigger protrusion (133) for pushing the unlocking pin (224) to move and thereby causing the second locking part (223) to separate from the first locking part (211).

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