Automobile seat adjusting device

Abstract

The application relates to a kind of automobile seat adjusting devices, including the seat body 1 that angle is adjustable relative to vehicle body, the seat body 1 is movably sleeved in the first rotating rod 3, and the first rotating rod 3 is provided with operating handle 2, the operating handle 2 is movably arranged relative to seat body 1, and the operating handle 2 is provided with mechanical locking mechanism 4;The application improves the structure of the existing automobile seat adjusting device, the motor adjustment is changed into mechanical adjustment after improvement, so that when the motor is damaged, the seat can still play the role of adjustment.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, and more specifically to an automotive seat adjustment device. Background Technology

[0002] Vehicle seats typically consist of a frame, seat cushion, backrest, and adjustment mechanism. Currently, most adjustable seats seen in the domestic market are found in imported cars. These seats come in various types, including two-way, four-way, and six-way adjustable seats. Six-way adjustable seats allow for forward and backward horizontal movement, vertical height adjustment, and backrest angle adjustment. International seat design is also trending towards lightweight and low-cost designs, with increasingly sophisticated manufacturing technologies and lightweight materials being widely applied to modern automotive seat design.

[0003] With the rapid development of the automotive industry, people's requirements for seats are also getting higher and higher. In order to further improve the comfort and safety of seats, major global automakers and auto parts suppliers are also continuously increasing their R&D efforts in seats, focusing on the research and application of new seat structures, new processes, and new materials. They are developing various types of suspension seats, electric seats, computer memory seats, and other new types of seats. Various auxiliary devices such as massage devices and seats with auxiliary heating and cooling are also constantly emerging.

[0004] Currently, most adjustment devices used in vehicle seats are driven by motors, which offer advantages such as ease of operation and simple control. However, once adjustment is complete, the system relies on the motor for control, meaning that if the motor fails, the adjustment function is lost. To address these issues, this invention proposes a new automotive seat adjustment device. Summary of the Invention

[0005] (1) Technical problems to be solved

[0006] The purpose of this invention is to overcome the shortcomings of the prior art, adapt to practical needs, and provide an automobile seat adjustment device to solve the above-mentioned technical problems.

[0007] (2) Technical solution

[0008] To achieve the objectives of this invention, the technical solution adopted is as follows:

[0009] An automotive seat adjustment device includes a seat body with an adjustable angle relative to the vehicle body. The seat body is movably sleeved outside a first rotating rod, and an operating handle is provided outside the first rotating rod. The operating handle is movably disposed relative to the seat body, and a mechanical locking mechanism is provided inside the operating handle.

[0010] Furthermore, the mechanical locking mechanism includes a fixed plate fixed outside the first rotating rod, and a plurality of limiting protrusions are provided on the circumference of the fixed plate. There is a limiting groove between two adjacent limiting protrusions. The mechanical locking mechanism also includes a locking component for locking the limiting protrusions. The locking component is located inside the operating handle and is connected to one end of the pressing rod. The pressing rod is movably inserted into the operating handle, and the other end of the pressing rod extends outside the operating handle. A first support spring is wound around the pressing rod, and the two ends of the first support spring are respectively fixedly connected to the side wall of the pressing rod and the inner side wall of the operating handle.

[0011] Furthermore, the locking assembly includes a locking protrusion movably disposed within the limiting groove, and the locking protrusion is fixedly disposed on the support plate. A guide limiting mechanism is fixedly connected to the support plate, and the free end of the guide limiting mechanism is fixedly connected to the inner side wall of the operating handle. A first rack is also connected to the support plate, and the first rack meshes with a drive gear. The drive gear is fixedly sleeved outside the second rotating rod, and the second rotating rod is rotatably disposed inside the operating handle. The drive gear meshes with the second rack, and the second rack is connected to the pressing rod.

[0012] Furthermore, the guide limiting mechanism includes a guide limiting rod, a guide limiting cylinder, and a guide limiting spring. The guide limiting rod is movably inserted into the guide limiting cylinder, and the guide limiting spring is wound around the outside of the guide limiting rod. The two ends of the guide limiting spring are respectively fixedly connected to the side wall of the guide limiting rod and the outer side wall of the guide limiting cylinder.

[0013] Furthermore, the operating handle is provided with a connecting mechanism, which includes a first push-pull rod with one end hinged to the pressing rod, and the other end of the first push-pull rod hinged to the side wall of the U-shaped connecting plate. The operating handle is provided with a connecting rod that matches the U-shaped connecting plate. The connecting rod is movably inserted into an arc-shaped hole, and the arc-shaped hole is opened on the operating handle. The connecting rod is fixedly connected to the seat body.

[0014] Furthermore, the connecting mechanism also includes a first support slider connected to the U-shaped connecting plate, and the first support slider is slidably disposed in a first support groove. The first support groove is fixedly connected to a fixed seat, and the fixed seat is fixedly disposed in the operating handle.

[0015] Furthermore, a fastening mechanism is provided on the U-shaped connecting plate.

[0016] Furthermore, the fastening mechanism includes a fastening plate movably disposed within the U-shaped connecting plate. The fastening plate has an arc-shaped structure and is provided with anti-slip grooves. A guide slide rod is fixedly connected to the side wall of the fastening plate, and the guide slide rod is movably inserted into the U-shaped connecting plate. A second support spring is wound around the guide slide rod, and the two ends of the second support spring are respectively fixedly connected to the side wall of the guide slide rod and the side wall of the U-shaped connecting plate.

[0017] Furthermore, one end of the second push-pull rod is hinged to the fastening plate, and the other end of the second push-pull rod is hinged to the clamping plate. The clamping plate is connected to the U-shaped connecting plate via a hinge, and one end of the fourth support spring is connected to the end of the U-shaped connecting plate. The other end of the fourth support spring is fixedly connected to the side wall of the clamping plate.

[0018] Furthermore, the second push-pull rod and the fastening plate are connected by an anti-jamming assembly. The anti-jamming assembly includes a second support slider that is hinged to the second push-pull rod and is slidably disposed in a second support groove. The second support groove is opened on the fastening plate. One end of a third support spring is fixedly connected to the side wall of the second support slider, and the other end of the third support spring is fixedly connected to the side wall of the second support groove.

[0019] (3) Beneficial effects:

[0020] This invention improves the structure of existing car seat adjustment devices. The improved car seat adjustment device replaces motor adjustment with mechanical adjustment, which can prevent the seat from still being adjusted even if the motor is damaged.

[0021] The mechanical locking mechanism of this invention can lock the seat body when the angle of the seat body does not need to be adjusted, and can be easily unlocked when the angle of the seat body needs to be adjusted. Specifically, pressing the pressing rod to the right will cause the supporting plate to move away from the fixed plate through the second rack, drive gear and the first rack. The movement of the supporting plate will cause the locking protrusion to disengage from the locking groove, thereby allowing the seat body and the operating handle to rotate relative to the first rotating rod for angle adjustment.

[0022] In the prior art, the seat body and the control handle are an integrated structure, which makes it impossible to adjust between the seat body and the control handle. The seat body and the control handle in this invention can be adjusted relative to each other, thus making the device more widely applicable. Of course, when it is necessary to adjust the angle of the seat body, the seat body and the control handle need to be fixed together. Specifically, when the pressing rod is pressed and moved to the right, the first push-pull rod will push the U-shaped connecting plate to move to the lower right. The movement of the U-shaped connecting plate will lock the connecting rod, thereby fixing the seat body and the control handle together.

[0023] The fastening mechanism provided in this invention is used to make the U-shaped connecting plate and the connecting rod more securely fixed. Specifically, during the movement of the U-shaped connecting plate toward the connecting rod, the fastening plate will come into contact with the connecting rod, thereby reducing the gap at the contact point and increasing the friction, thus achieving a further fixing effect. After the connecting rod and the fastening plate come into contact, the fastening plate will move to the left relative to the U-shaped connecting plate. The leftward movement of the U-shaped connecting plate will pull the clamping plate to rotate through the second push-pull rod and move it toward the connecting rod. Through the clamping action, the connecting rod will be more securely fixed in the fastening plate. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of an embodiment of the car seat adjustment device of the present invention;

[0025] Figure 2 This is a cross-sectional view of the operating handle in the car seat adjustment device of the present invention;

[0026] Figure 3 This is an enlarged schematic diagram of structure A in the car seat adjustment device 3 of the present invention;

[0027] Figure 4 This is a schematic diagram of the connecting mechanism in the car seat adjustment device of the present invention;

[0028] Figure 5 This is a schematic diagram of the fastening mechanism in the car seat adjustment device of the present invention.

[0029] The attached figures are labeled as follows:

[0030] Seat body 1, operating handle 2, first rotating rod 3, mechanical locking mechanism 4, fixed plate 41, limiting protrusion 42, locking assembly 43, locking protrusion 431, support plate 432, guide limiting mechanism 433, guide limiting rod 4331, guide limiting cylinder 4332, guide limiting spring 4333, first rack 434, drive gear 435, second rotating rod 436, second rack 437, pressing rod 44, first support spring 45, connecting mechanism 5, first push-pull rod 51, U-shaped connecting plate 52, first support slider 53, first support slide groove 54, fixed seat 55, connecting rod 56, arc-shaped hole 57, fastening mechanism 6, fastening plate 61, guide slide rod 62, second support spring 63, second support slide groove 64, second support slider 65, third support spring 66, second push-pull rod 67, clamping plate 68, hinge 69, fourth support spring 610. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-5 The present invention is further illustrated by the embodiments:

[0032] A car seat adjustment device includes a seat body 1 with an adjustable angle relative to the vehicle body. The seat body 1 is movably sleeved outside a first rotating rod 3, and an operating handle 2 is provided outside the first rotating rod 3. The operating handle 2 is movably arranged relative to the seat body 1, and a mechanical locking mechanism 4 is provided inside the operating handle 2. The present invention improves the structure of the existing car seat adjustment device. The improved car seat adjustment device changes the motor adjustment to mechanical adjustment, which can prevent the seat from still being adjusted even if the motor is damaged.

[0033] Figure 2 This is a cross-sectional view of the operating handle in the car seat adjustment device of the present invention, with reference to... Figure 2As shown, in this embodiment, the mechanical locking mechanism 4 includes a fixed disk 41 fixed outside the first rotating rod 3, and a plurality of limiting protrusions 42 are provided on the circumference of the fixed disk 41. There are limiting grooves between two adjacent limiting protrusions 42. The mechanical locking mechanism 4 also includes a locking component 43 for locking the limiting protrusions 42. The locking component 43 is disposed inside the operating handle 2, and the locking component 43 is connected to one end of the pressing rod 44. The pressing rod 44 is movably inserted into the operating handle 2, and the other end of the pressing rod 44 extends outside the operating handle 2. A first support spring 45 is wound around the pressing rod 44, and the two ends of the first support spring 45 are respectively fixedly connected to the pressing rod 44. On the side wall of 4 and the inner side wall of the operating handle 2, the mechanical locking mechanism 4 of the present invention is provided to lock the seat body 1 when the angle of the seat body 1 does not need to be adjusted, and to unlock it through convenient operation when the angle of the seat body 1 needs to be adjusted. Specifically, pressing the pressing rod 44 to the right will cause the supporting plate 432 to move away from the fixed plate 41 through the second rack 437, the drive gear 435 and the first rack 434. The movement of the supporting plate 432 will cause the locking protrusion 431 to disengage from the locking groove, thereby allowing the seat body 1 and the operating handle 2 to rotate relative to the first rotating rod 3 for angle adjustment.

[0034] In this embodiment, the locking component 43 includes a locking protrusion 431 movably disposed within the limiting groove, and the locking protrusion 431 is fixedly disposed on the support plate 432. A guide limiting mechanism 433 is fixedly connected to the support plate 432, and the free end of the guide limiting mechanism 433 is fixedly connected to the inner side wall of the operating handle 2. A first rack 434 is also connected to the support plate 432, and the first rack 434 meshes with a drive gear 435. The drive gear 435 is fixedly sleeved outside the second rotating rod 436, and the second rotating rod 436 is rotatably disposed within the operating handle 2. The drive gear 435 meshes with a second rack 437, and the second rack 437 is connected to a pressing rod 44. The locking component 43 is used to lock and unlock the seat body 1 and the operating handle 2 with the first rotating rod 3. During the locking process, the leftward movement of the pressing rod 44 will cause the first rack 434 to move to the lower left through the second rack 437 and the drive gear 435. The movement of the first rack 434 will push the support plate 432 with the locking protrusion 431 into the limiting groove, thereby realizing the locking process.

[0035] In this embodiment, the guide limiting mechanism 433 includes a guide limiting rod 4331, a guide limiting cylinder 4332, and a guide limiting spring 4333. The guide limiting rod 4331 is movably inserted into the guide limiting cylinder 4332, and the guide limiting spring 4333 is wound around the outside of the guide limiting rod 4331. Both ends of the guide limiting spring 4333 are respectively fixedly connected to the side wall of the guide limiting rod 4331 and the outer side wall of the guide limiting cylinder 4332. The guide limiting mechanism 433 serves both to guide and support the movement of the support plate 432, and to provide power for the resetting movement of the support plate 432.

[0036] In this embodiment, the operating handle 2 is provided with a connecting mechanism 5. The connecting mechanism 5 includes a first push-pull rod 51 with one end hinged to the pressing rod 44, and the other end of the first push-pull rod 51 hinged to the side wall of the U-shaped connecting plate 52. The operating handle 2 is provided with a connecting rod 56 that matches the U-shaped connecting plate 52. The connecting rod 56 is movably inserted into an arc-shaped hole 57, and the arc-shaped hole 57 is opened on the operating handle 2. The connecting rod 56 is fixedly connected to the seat body 1. The connecting mechanism 5 also includes a first support slider 53 connected to the U-shaped connecting plate 52, and the first support slider 53 is slidably disposed in a first support groove 54. The first support groove 54 is fixedly connected to the... The seat body 1 and the operating handle 2 are fixedly mounted on the fixed base 55. In the prior art, the seat body 1 and the operating handle 2 are an integral structure, which makes it impossible to adjust between the seat body 1 and the operating handle 2. In this invention, the seat body 1 and the operating handle 2 can be adjusted relative to each other, thus making the device more widely applicable. Of course, when it is necessary to adjust the angle of the seat body 1, the seat body 1 and the operating handle 2 need to be fixed together. Specifically, when the pressing rod 44 is pressed and moved to the right, the first push-pull rod 51 will push the U-shaped connecting plate 52 to move to the lower right. The movement of the U-shaped connecting plate 52 will lock the connecting rod 56, thereby fixing the seat body 1 and the operating handle 2 together.

[0037] In this embodiment, a fastening mechanism 6 is provided on the U-shaped connecting plate 52. The fastening mechanism 6 includes a fastening plate 61 movably disposed within the U-shaped connecting plate 52. The fastening plate 61 has an arc-shaped structure and is provided with an anti-slip groove. A guide slide rod 62 is fixedly connected to the side wall of the fastening plate 61, and the guide slide rod 62 is movably inserted into the U-shaped connecting plate 52. A second support spring 63 is wound around the guide slide rod 62, and the two ends of the second support spring 63 are respectively fixedly connected to the side wall of the guide slide rod 62 and the side wall of the U-shaped connecting plate 52. One end of a second push-pull rod 67 is hinged to the fastening plate 61, and the other end of the second push-pull rod 67 is hinged to a clamping plate 68. The clamping plate 68 is connected to the U-shaped connecting plate 52 via a hinge 69. One end of the fourth support spring 610 is connected to the end of the 2, and the other end of the fourth support spring 610 is fixedly connected to the side wall of the clamping plate 68. The fastening mechanism 6 provided in this invention is used to make the U-shaped connecting plate 52 and the connecting rod 56 more firmly fixed. Specifically, during the process of the U-shaped connecting plate 52 moving towards the connecting rod 56, the fastening plate 61 will contact the connecting rod 56, thereby reducing the gap at the contact point and increasing the friction, thereby achieving a further fixing effect. After the connecting rod 56 and the fastening plate 61 are connected, the fastening plate 61 will move to the left relative to the U-shaped connecting plate 52. The leftward movement of the U-shaped connecting plate 52 will pull the clamping plate 68 to rotate through the second push-pull rod 67 and move closer to the connecting rod 56. Through the clamping action, the connecting rod 56 will be more firmly fixed in the fastening plate 61.

[0038] In this embodiment, the second push-pull rod 67 and the fastening plate 61 are connected by an anti-jamming assembly. The anti-jamming assembly includes a second support slider 65 hinged to the second push-pull rod 67, and the second support slider 65 is slidably disposed in a second support groove 64. The second support groove 64 is formed on the fastening plate 61. One end of a third support spring 66 is fixedly connected to the side wall of the second support slider 65, and the other end of the third support spring 66 is fixedly connected to the side wall of the second support groove 64. The anti-jamming component is designed to prevent jamming. Specifically, by setting up the anti-jamming component, it ensures that the clamping plate 68 has sufficient rotation range to clamp and fix the connecting rod 56. Specifically, when the connecting rod 56 abuts against the fastening plate 61 and moves to the left relative to the U-shaped connecting plate 52, the second push-pull rod 67 pulls the clamping plate 68 to rotate and clamp the connecting rod 56. As the connecting rod 56 continues to abut, the fastening plate 61 will continue to move to the left relative to the U-shaped connecting plate 52. The presence of the anti-jamming component ensures that the above movement process can proceed smoothly.

[0039] Beneficial effects of this invention:

[0040] This invention improves the structure of existing car seat adjustment devices. The improved car seat adjustment device replaces motor adjustment with mechanical adjustment, which can prevent the seat from still being adjusted even if the motor is damaged.

[0041] The mechanical locking mechanism 4 provided in this invention can lock the seat body 1 when the angle of the seat body 1 does not need to be adjusted, and can be easily unlocked when the angle of the seat body 1 needs to be adjusted. Specifically, pressing the pressing rod 44 to the right will cause the supporting plate 432 to move away from the fixed plate 41 through the second rack 437, the drive gear 435 and the first rack 434. The movement of the supporting plate 432 will cause the locking protrusion 431 to disengage from the locking groove, thereby allowing the seat body 1 and the operating handle 2 to rotate relative to the first rotating rod 3 for angle adjustment.

[0042] In the prior art, the seat body 1 and the operating handle 2 are an integral structure, which makes it impossible to adjust between the seat body 1 and the operating handle 2. In the present invention, the seat body 1 and the operating handle 2 can be adjusted relative to each other, thus making the device more widely applicable. Of course, when it is necessary to adjust the angle of the seat body 1, the seat body 1 and the operating handle 2 need to be fixed together. Specifically, when the pressing rod 44 is pressed and moved to the right, the first push-pull rod 51 will push the U-shaped connecting plate 52 to move to the lower right. The movement of the U-shaped connecting plate 52 will lock the connecting rod 56, thereby fixing the seat body 1 and the operating handle 2 together.

[0043] The fastening mechanism 6 provided in this invention is used to make the U-shaped connecting plate 52 and the connecting rod 56 more securely fixed. Specifically, during the movement of the U-shaped connecting plate 52 toward the connecting rod 56, the fastening plate 61 will come into contact with the connecting rod 56, thereby reducing the gap at the contact point and increasing the friction, thereby achieving a further fixing effect. After the connecting rod 56 and the fastening plate 61 come into contact, the fastening plate 61 will move to the left relative to the U-shaped connecting plate 52. The leftward movement of the U-shaped connecting plate 52 will pull the clamping plate 68 to rotate through the second push-pull rod 67 and move it toward the connecting rod 56. Through the clamping action, the connecting rod 56 will be more securely fixed in the fastening plate 61.

[0044] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of the present invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. An automobile seat adjusting device comprising a seat body (1) which is angularly adjustable with respect to a vehicle body, characterized by, The seat body (1) is movably sleeved outside the first rotating rod (3), and an operating handle (2) is provided outside the first rotating rod (3). The operating handle (2) is movably arranged relative to the seat body (1), and a mechanical locking mechanism (4) is provided inside the operating handle (2). The mechanical locking mechanism (4) includes a fixed plate (41) fixed outside the first rotating rod (3), and a plurality of limiting protrusions (42) are provided on the circumference of the fixed plate (41). There is a limiting groove between two adjacent limiting protrusions (42). The mechanical locking mechanism (4) also includes Includes a locking component (43) for locking the limiting protrusion (42), and the locking component (43) is located inside the operating handle (2), and the locking component (43) is connected to one end of the pressing rod (44), the pressing rod (44) is movably inserted into the operating handle (2), and the other end of the pressing rod (44) extends outside the operating handle (2), a first support spring (45) is wound around the pressing rod (44), and the two ends of the first support spring (45) are respectively fixedly connected to the side wall of the pressing rod (44) and the inner side wall of the operating handle (2); The locking assembly (43) includes a locking protrusion (431) movably disposed in the limiting groove, and the locking protrusion (431) is fixedly disposed on the support plate (432). A guide limiting mechanism (433) is fixedly connected to the support plate (432), and the free end of the guide limiting mechanism (433) is fixedly connected to the inner side wall of the operating handle (2). A first rack (434) is also connected to the support plate (432), and the first rack (434) meshes with the drive gear (435). The drive gear (435) is fixedly sleeved outside the second rotating rod (436), and the second rotating rod (436) is rotatably disposed inside the operating handle (2). The drive gear (435) meshes with the second rack (437), and the second rack (437) is connected to the pressing rod (44).

2. The automobile seat adjusting apparatus according to claim 1, characterized by: The guide limiting mechanism (433) includes a guide limiting rod (4331), a guide limiting cylinder (4332), and a guide limiting spring (4333). The guide limiting rod (4331) is movably inserted into the guide limiting cylinder (4332), and the guide limiting spring (4333) is wound around the outside of the guide limiting rod (4331). The two ends of the guide limiting spring (4333) are respectively fixedly connected to the side wall of the guide limiting rod (4331) and the outer side wall of the guide limiting cylinder (4332).

3. The automobile seat adjusting apparatus according to claim 1, wherein: The operating handle (2) is provided with a connecting mechanism (5). The connecting mechanism (5) includes a first push-pull rod (51) with one end hinged to the pressing rod (44). The other end of the first push-pull rod (51) is hinged to the side wall of the U-shaped connecting plate (52). The operating handle (2) is provided with a connecting rod (56) that matches the U-shaped connecting plate (52). The connecting rod (56) is movably inserted into the arc-shaped hole (57), and the arc-shaped hole (57) is opened on the operating handle (2). The connecting rod (56) is fixedly connected to the seat body (1).

4. The automobile seat adjusting apparatus according to claim 3, wherein: The connecting mechanism (5) further includes a first support slider (53) connected to the U-shaped connecting plate (52), and the first support slider (53) is slidably disposed in the first support groove (54). The first support groove (54) is fixedly connected to the fixed seat (55), and the fixed seat (55) is fixedly disposed in the operating handle (2).

5. The automobile seat adjusting apparatus according to claim 3, wherein: The U-shaped connecting plate (52) is provided with a fastening mechanism (6).

6. The automotive seat adjustment apparatus according to claim 5, characterized by: The fastening mechanism (6) includes a fastening plate (61) movably disposed within the U-shaped connecting plate (52). The fastening plate (61) has an arc-shaped structure and is provided with an anti-slip groove. A guide slide rod (62) is fixedly connected to the side wall of the fastening plate (61), and the guide slide rod (62) is movably inserted into the U-shaped connecting plate (52). A second support spring (63) is wound around the guide slide rod (62), and the two ends of the second support spring (63) are respectively fixedly connected to the side wall of the guide slide rod (62) and the side wall of the U-shaped connecting plate (52).

7. The automotive seat adjustment apparatus according to claim 6, characterized by: One end of the second push-pull rod (67) is hinged to the fastening plate (61), and the other end of the second push-pull rod (67) is hinged to the clamping plate (68). The clamping plate (68) is connected to the U-shaped connecting plate (52) via a hinge (69), and one end of the U-shaped connecting plate (52) is connected to the end of the fourth support spring (610). The other end of the fourth support spring (610) is fixedly connected to the side wall of the clamping plate (68).

8. The automotive seat adjustment apparatus according to claim 7, characterized by: The second push-pull rod (67) and the fastening plate (61) are connected by an anti-jamming assembly. The anti-jamming assembly includes a second support slider (65) hinged to the second push-pull rod (67), and the second support slider (65) is slidably disposed in the second support groove (64). The second support groove (64) is opened on the fastening plate (61). One end of a third support spring (66) is fixedly connected to the side wall of the second support slider (65), and the other end of the third support spring (66) is fixedly connected to the side wall of the second support groove (64).

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