Seat backrest unlocking pull rod process structure

Abstract

The utility model discloses a seat backrest unlocking pull rod process structure, which relates to the technical field of automobile part manufacturing, and comprises a bottom plate, a first return spring, a second return spring and an opening rod, two connecting shafts are arranged on the bottom plate, a ratchet wheel is arranged on one connecting shaft, and a gasket, a pawl and a locking piece are sequentially arranged on the other connecting shaft; a return shaft is arranged on the locking sheet; the gasket is sleeved with the first return spring, and the two ends of the first return spring are connected with the bottom plate and the pawl correspondingly. Two ends of the second return spring are respectively connected with the return shaft and the ratchet wheel; one end of the opening rod is connected with the pawl through a connecting piece, and the other end of the opening rod is sequentially provided with a first bent section and a second bent section. The unlocking device is more reasonable in structure, and unlocking stability and reliability are improved; the strength of the pull rod is increased, and unlocking failure quality claims are reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts manufacturing technology, specifically a process structure for unlocking a seat back lever. Background Technology

[0002] The seat frame is a key component in the seat assembly. The connection and fixation between the frame and the vehicle body is not only a critical connection point for assembly, but also a key part for unlocking the seat. Therefore, the rationality of the design directly affects the quality of the seat assembly. Due to the simple structure and low cost of this unlocking lever, most manufacturers continue to use it. However, they often overlook the resulting cost of quality claims. Over time, under the influence of gravity during vehicle operation, deformation occurs, leading to ineffective unlocking and affecting the safety of the entire vehicle and the personal safety of passengers. Therefore, structural optimization of the unlocking lever is imperative to meet customer needs. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a more reasonable structure for unlocking a seat backrest lever, which improves unlocking stability and reliability; increases lever strength, and reduces quality claims due to unlocking failure.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a seat back unlocking lever structure, including a base plate, a first return spring, a second return spring, and an opening lever; the base plate is provided with two connecting shafts, one of which is provided with a ratchet, and the other connecting shaft is provided with a washer, a pawl, and a locking plate in sequence; the locking plate is provided with a return shaft; the first return spring is sleeved outside the washer, and both ends of the first return spring are respectively connected to the base plate and the pawl; both ends of the second return spring are respectively connected to the return shaft and the ratchet; one end of the opening lever is connected to the pawl through a connector, and the other end of the opening lever is provided with a first bent section and a second bent section in sequence.

[0005] A further improvement is that the base plate is provided with two limiting holes, one end of the connecting shaft is provided with a limiting groove that matches the limiting holes, and the other end of the connecting shaft is provided with a retaining edge.

[0006] A further improvement is made in that: the pawl is provided with a first fixing hole; one end of the opening rod is provided with a connecting plate, and the connecting plate is provided with a second fixing hole; the connecting member includes a connecting plate, one side of the connecting plate is provided with a first connecting protrusion that matches the first fixing hole, and the other side of the connecting plate is provided with a second connecting protrusion that matches the second fixing hole.

[0007] A further improvement is that a gasket is provided between the connecting plate and the connecting component.

[0008] A further improvement is that: the locking plate is provided with a connecting hole, one end of the return shaft is provided with a reduced diameter portion that matches the connecting hole, and the other end of the return shaft is provided with a slot for connecting the second return spring.

[0009] A further improvement is that: the ratchet is provided with a positioning hole, one end of the second return spring is provided with a first connecting foot that matches the positioning hole, and the other end of the second return spring is provided with a second connecting foot that matches the slot.

[0010] A further improvement is that a sponge strip is provided inside the second return spring.

[0011] A further improvement is that: one end of the first return spring is provided with a first hook part for connecting to the base plate, and the other end of the first return spring is provided with a second hook part for connecting to the pawl.

[0012] A further improvement is that the plane where the opening rod is located is perpendicular to the plane where the second bent section is located.

[0013] A further improvement is that the free end of the second bent section is provided with a hook.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. In this utility model, by optimizing the process structure of the seat back unlocking lever, the unlocking problem caused by the deformation of the seat back unlocking lever is solved, realizing the upgrade of the company's seats from product design and process, reducing customer complaints, reducing costs, and the parts have been approved by customers and completed type testing and vehicle road testing. Attached Figure Description

[0016] Figure 1 This is a front view of the seat back unlocking lever process structure in this utility model embodiment;

[0017] Figure 2 for Figure 1 A sectional view of the AA direction;

[0018] Figure 3 for Figure 1 The left view;

[0019] Figure 4 This is an exploded view of the seat back unlocking lever process structure in this utility model embodiment;

[0020] Figure 5 This is a schematic diagram of the structure of the base plate in an embodiment of this utility model;

[0021] Figure 6 This is a schematic diagram of the connecting shaft in an embodiment of the present utility model;

[0022] Figure 7 This is a schematic diagram of the ratchet structure in an embodiment of the present invention;

[0023] Figure 8 This is a schematic diagram of the pawl structure in an embodiment of the present invention;

[0024] Figure 9 This is a schematic diagram of the locking plate in an embodiment of the present invention;

[0025] Figure 10 This is a schematic diagram of the structure of the first return spring in an embodiment of this utility model;

[0026] Figure 11 This is a schematic diagram of the opening rod in an embodiment of the present utility model;

[0027] Figure 12 This is a schematic diagram of the connector structure in an embodiment of this utility model;

[0028] Figure 13 This is a schematic diagram of the return shaft in an embodiment of the present invention;

[0029] Figure 14 This is a schematic diagram of the structure of the second return spring in an embodiment of this utility model.

[0030] Figure label:

[0031] 1-Base plate; 1-1-Limiting hole; 2-Connecting shaft; 2-1-Limiting groove; 2-2-Side guard; 3-Ratchet; 3-1-Positioning hole; 4-Washer; 5-Pawl; 5-1-First fixing hole; 6-Locking piece; 6-1-Connecting hole; 7-First return spring; 7-1-First hook part; 7-2-Second hook part; 8-Opening rod; 8-1-Connecting plate; 8-2-Second fixing hole; 8-3-First bending section; 8-4-Second bending section; 8-5-Return hook part; 9-Connecting piece; 9-1-Connecting disc; 9-2-First connecting protrusion; 9-3-Second connecting protrusion; 10-Washer; 11-Returning shaft; 11-1-Reduced diameter part; 11-2-Slot; 12-Second return spring; 12-1-First connecting foot; 12-2-Second connecting foot. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0033] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0035] The following description, in conjunction with the accompanying drawings, further illustrates specific embodiments of the present invention, making the technical solution and beneficial effects of the present invention clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0036] See Figures 1-4 As shown, this utility model embodiment provides a seat back unlocking lever structure, including a base plate 1, a first return spring 7, a second return spring 12, and an opening lever 8; the base plate 1 is provided with two connecting shafts 2, one of which is provided with a ratchet 3, and the other connecting shaft 2 is provided with a washer 4, a pawl 5, and a locking plate 6 in sequence; the locking plate 6 is provided with a return shaft 11; the first return spring 7 is sleeved on the washer 4, and both ends of the first return spring 7 are connected to the base plate 1 and the pawl 5 respectively; both ends of the second return spring 12 are connected to the return shaft 11 and the ratchet 3 respectively; one end of the opening lever 8 is connected to the pawl 5 through a connector 9, and the other end of the opening lever 8 is provided with a first bent section 8-3 and a second bent section 8-4 in sequence. Specifically, the plane where the opening lever 8 is located is perpendicular to the plane where the second bent section 8-4 is located. The free end of the second bent section 8-4 is provided with a hook portion 8-5. The connection point between the opening rod 8 and the first bent section 8-3 is the first stress point, and the connection point between the first bent section 8-3 and the second bent section 8-4 is the second stress point. The unlocking stress point is distributed from one point to two points, and the tensile strength is increased from one point to two points. The strength is increased, the deformation under stress is reduced, and the unlocking stability and reliability are improved.

[0037] See Figure 5 and Figure 6 As shown, the base plate 1 is provided with two limiting holes 1-1, one end of the connecting shaft 2 is provided with a limiting groove 2-1 that matches the limiting holes 1-1, and the other end of the connecting shaft 2 is provided with a retaining edge 2-2.

[0038] See Figure 8 , Figure 11 and Figure 12 As shown, the pawl 5 is provided with a first fixing hole 5-1; one end of the opening rod 8 is provided with a connecting plate 8-1, and the connecting plate 8-1 is provided with a second fixing hole 8-2; the connecting member 9 includes a connecting plate 9-1, one side of the connecting plate 9-1 is provided with a first connecting protrusion 9-2 that matches the first fixing hole 5-1, and the other side of the connecting plate 9-1 is provided with a second connecting protrusion 9-3 that matches the second fixing hole 8-2. Specifically, a gasket 10 is provided between the connecting plate 8-1 and the connecting member 9.

[0039] See Figure 9 and Figure 13 As shown, the locking plate 6 is provided with a connecting hole 6-1, one end of the return shaft 11 is provided with a reduced diameter part 11-1 that matches the connecting hole 6-1, and the other end of the return shaft 11 is provided with a groove 11-2 for connecting the second return spring 12.

[0040] See Figure 7 and Figure 14 As shown, the ratchet 3 is provided with a positioning hole 3-1, one end of the second return spring 12 is provided with a first connecting foot 12-1 that matches the positioning hole 3-1, and the other end of the second return spring 12 is provided with a second connecting foot 12-2 that matches the slot 11-2. Specifically, a sponge strip is provided inside the second return spring 12.

[0041] See Figure 10 As shown, one end of the first return spring 7 is provided with a first hook part 7-1 for connecting to the base plate 1, and the other end of the first return spring 7 is provided with a second hook part 7-2 for connecting to the pawl 5.

[0042] In the description of this specification, references to terms such as "an embodiment," "preferred," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. Illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] Based on the above description of the structure and principle, those skilled in the art should understand that this utility model is not limited to the specific embodiments described above. Improvements and substitutions based on this utility model using techniques known in the art all fall within the protection scope of this utility model and should be defined by the claims.

Claims

1. A process structure of a seat back un-locking pull rod, comprising a bottom plate (1), characterized in that: It also comprises a first return spring (7), a second return spring (12) and an opening lever (8); The bottom plate (1) is provided with two connecting shafts (2), one of which is provided with a ratchet wheel (3), and the other is sequentially provided with a washer (4), a pawl (5) and a locking sheet (6); the locking sheet (6) is provided with a return shaft (11); The first return spring (7) is sleeved outside the washer (4), and the two ends of the first return spring (7) are connected with the bottom plate (1) and the pawl (5) respectively; The two ends of the second return spring (12) are connected with the return shaft (11) and the ratchet wheel (3) respectively; One end of the opening lever (8) is connected with the pawl (5) through a connecting piece (9), and the other end of the opening lever (8) is sequentially provided with a first bending section (8-3) and a second bending section (8-4).

2. The seat back unlatching pull rod process structure of claim 1, wherein: The bottom plate (1) is provided with two limiting holes (1-1), one end of the connecting shaft (2) is provided with a limiting groove (2-1) matched with the limiting hole (1-1), and the other end of the connecting shaft (2) is provided with a stopping edge (2-2).

3. The seat back unlatching pull rod process structure of claim 1, wherein: The pawl (5) is provided with a first fixing hole (5-1); one end of the opening lever (8) is provided with a connecting plate (8-1), and the connecting plate (8-1) is provided with a second fixing hole (8-2); the connecting piece (9) comprises a connecting disc (9-1), one side of the connecting disc (9-1) is provided with a first connecting protrusion (9-2) matched with the first fixing hole (5-1), and the other side of the connecting disc (9-1) is provided with a second connecting protrusion (9-3) matched with the second fixing hole (8-2).

4. The seat back unlatching pull rod process structure of claim 3, wherein: A gasket (10) is arranged between the connecting plate (8-1) and the connecting piece (9).

5. The seat back unlatching pull rod process structure of claim 1, wherein: The locking sheet (6) is provided with a connecting hole (6-1), one end of the return shaft (11) is provided with a reduced diameter portion (11-1) matched with the connecting hole (6-1), and the other end of the return shaft (11) is provided with a clamping groove (11-2) for connecting the second return spring (12).

6. The seat back unlatching pull rod process structure of claim 5, wherein: The ratchet wheel (3) is provided with a positioning hole (3-1), one end of the second return spring (12) is provided with a first connecting leg (12-1) matched with the positioning hole (3-1), and the other end of the second return spring (12) is provided with a second connecting leg (12-2) matched with the clamping groove (11-2).

7. The seat back unlatching pull rod process structure of claim 1, wherein: A sponge strip is arranged in the second return spring (12).

8. The seat back unlatching pull rod process structure of claim 1, wherein: One end of the first return spring (7) is provided with a first hanging part (7-1) for connecting the bottom plate (1), and the other end of the first return spring (7) is provided with a second hanging part (7-2) for connecting the pawl (5).

9. The seat back unlatching pull rod process structure of claim 1, wherein: The plane where the opening lever (8) is located is perpendicular to the plane where the second bending section (8-4) is located.

10. The seat back unlatching pull rod process structure of claim 1, wherein: The free end of the second bending section (8-4) is provided with a hook part (8-5). The free end of the second bending section (8-4) is provided with a hook part (8-5).

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