A collapse structure of a steering column

Abstract

The application discloses a collapsing structure of a steering column, which comprises a C-shaped support, an energy-absorbing sheet, a toothed rock assembly and a cam block. One side of a column pipe is provided with the C-shaped support and the energy-absorbing sheet. The C-shaped support is connected with the upper plane of the energy-absorbing sheet through a rivet. The energy-absorbing sheet is provided with a toothed structure with bidirectional tooth patterns. The column pipe provided with the C-shaped support and the energy-absorbing sheet is externally sleeved with a support sleeve. The support sleeve is provided with the toothed rock assembly in a through hole on one side of the toothed structure. One end of the toothed rock assembly is engaged with the bidirectional tooth patterns of the toothed structure through the support sleeve. The other end of the toothed rock assembly is in contact with the cam block. The cam block is arranged on a handle shaft. The application can reduce the jamming phenomenon, effectively prevent the collapsing function from failing and improve the user experience.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of collapsing structure, and particularly relates to a collapsing structure of a steering column. BACKGROUND

[0002] When a traffic collision accident occurs to a car, especially a front collision accident, the driver often inclines forward due to inertia, so that the distance between the driver's chest and the steering wheel is suddenly reduced, and the driver's chest may be injured by colliding with the steering wheel. In addition, the space occupied by the deployment of the safety airbag in the steering wheel will further increase the impact force on the driver's chest. In order to reduce the impact force on the driver's chest, the car increases the collapsing structure on the steering column to reduce the damage transmitted from the steering column to the human body due to the collision.

[0003] The existing collapsing structure includes a cam block, a cam disc, a tooth stone and a tooth sheet. The cam block is arranged on a handle shaft. One side of the cam block is provided with the cam disc. The cam disc is connected to a support through the handle shaft. The tooth stone is arranged on the cam disc. The tooth sheet is assembled on the column pipe by interference or clamping. When the handle is rotated, the handle shaft rotates with the cam block. The cam block rotates to press the cam disc to separate or engage the tooth stone and the tooth sheet. When the tooth stone and the tooth sheet are separated, the length adjustment function of the column pipe can be realized. When the tooth stone and the tooth sheet are engaged, the column pipe is in a clamped state. When collapsing, the tooth sheet cannot move because the tooth stone has engaged with the tooth sheet, but the column pipe will move downward along the AB line of the steering column. Therefore, the relative movement of the tooth sheet and the column pipe generates a collapsing force. However, this structure increases the adapter (cam disc), so that the manufacturing tolerance is affected, and the collapsing function is invalid or the user experience is poor. Therefore, how to ensure that the collapsing structure can realize the length adjustment of the column pipe and reduce the occurrence of the jamming phenomenon, prevent the collapsing function from being invalid, and improve the user experience is a technical problem that needs to be solved by the person skilled in the art. SUMMARY

[0004] The purpose of the present application is to solve the above problems, and to provide a collapsing structure of a steering column which can reduce the jamming phenomenon, effectively prevent the collapsing function from being invalid, and improve the user experience.

[0005] In order to achieve the above purpose, the present application provides a collapsing structure of a steering column, which comprises a C-shaped support, an energy-absorbing sheet, a tooth stone assembly and a cam block. One side of a column pipe is provided with the C-shaped support and the energy-absorbing sheet. The C-shaped support is connected to the upper plane of the energy-absorbing sheet through a rivet. The energy-absorbing sheet is provided with a tooth-shaped structure with bidirectional tooth patterns. The column pipe provided with the C-shaped support and the energy-absorbing sheet is sleeved with a support sleeve. The support sleeve is provided with the tooth stone assembly in the through hole on one side relative to the tooth-shaped structure. One end of the tooth stone assembly is engaged with the bidirectional tooth patterns of the tooth-shaped structure through the support sleeve. The other end of the tooth stone assembly is in contact with the cam block. The cam block is arranged on a handle shaft.

[0006] As further optimization, the gear assembly comprises a gear frame, a gear subassembly and a large spring, the gear frame comprises a gear frame body, opposite sides of the gear frame body are provided with connecting parts, the gear frame is connected to one side of the support sleeve through the connecting parts, the gear frame body is provided with a through hole, the gear subassembly is arranged in the through hole, and the gear subassembly is provided with the large spring between the gear frame.

[0007] As further optimization, the gear subassembly is provided with a gear cap at one end away from the gear frame.

[0008] As further optimization, the gear subassembly comprises a gear, the gear comprises a gear body, two sides of one end of the gear body close to the gear frame body are provided with tooth-shaped parts, the two sides of the tooth-shaped parts are engaged with bidirectional tooth patterns of the tooth-shaped structure, the gear body is arranged in the through hole of the gear frame body through the large spring, the other end of the gear body is provided with a gear platform, the gear platform is abutted against the large spring, the gear body at one end with the gear platform is provided with a blind hole, opposite sides of the blind hole are provided with slots, a small spring and a gear shaft are sequentially arranged in the blind hole, opposite sides of the gear shaft are provided with through holes, and a limiting pin is arranged in the blind hole through the through holes and the slots and can move up and down along the slots.

[0009] As further optimization, the cam block comprises a handle connecting part and a gear pressing part, the handle connecting part is provided with a spline through hole, the cam block is connected to the handle shaft through the spline through hole, one side of the handle connecting part is provided with the gear pressing part, and the gear pressing part is provided with a boss for extruding the gear assembly relative to one side of the gear assembly.

[0010] As further optimization, the boss comprises a flat area, a buffer area and a pressing area, the flat area is connected with the pressing area through the buffer area, the height of the pressing area is greater than the height of the buffer area, and the height of the buffer area is greater than the height of the flat area, so that the boss forms a handle pressing and loosening area from high to low.

[0011] As further optimization, the energy-absorbing sheet comprises an upper plane, a lower plane and a bending part, the upper plane is connected with the lower plane through the bending part, the energy-absorbing sheet is connected with the column pipe through the lower plane, longitudinal two sides of the upper plane are provided with stepped flanges extending to the lower plane, opposite sides of one end of the lower plane away from the bending part are provided with brake bosses, the brake bosses are abutted against steps of the stepped flanges, and one end of the lower plane away from the bending part is provided with an avoiding hole.

[0012] Advantages and beneficial effects of the present application

[0013] 1. The tooth stone assembly of the present application is directly installed on the support sleeve through bolts, reducing the adapter, thereby reducing the influence of manufacturing tolerance, reducing the generation of jamming phenomenon, effectively preventing the failure of collapse function, and improving the user experience.

[0014] 2. The tooth stone subassembly of the present application comprises tooth stone, small spring, tooth stone shaft and limit pin, the blind hole of the tooth stone is sequentially provided with small spring and tooth stone shaft, the opposite sides of the tooth stone shaft are provided with through holes, and the opposite sides of the tooth stone are provided with slots, the limit pin is inserted into the slots and the through holes to connect the tooth stone and the tooth stone shaft, since the tooth stone shaft is in interference fit with the limit pin through the through hole, and the limit pin connected with the tooth stone shaft is in clearance fit with the tooth stone through the long circular hole slot, the small spring can drive the tooth stone shaft and the limit pin to move up and down in the slot of the tooth stone, avoiding the rigid connection of the tooth stone shaft and the tooth stone, and preventing the problem that the tooth tips of the tooth-shaped parts on the two sides of the tooth stone are abutted on the tooth tips of the bidirectional tooth-shaped structure of the tooth-shaped structure, and the handle cannot be closed.

[0015] 3. The tooth stone of the present application is provided with two tooth-shaped parts at the bottom, and the meshing tooth-shaped structure is provided with bidirectional tooth-shaped structure, so that the length adjustment function bidirectional holding force can be improved through the cooperation of the tooth stone and the tooth-shaped structure.

[0016] 4. The upper plane of the energy absorbing sheet is provided with a stepped flange extending in the downward plane direction, and the lower plane of the energy absorbing sheet is provided with a brake boss away from the bending end, the brake boss and the flange are matched with each other to prevent the steering column from moving towards the driver.

[0017] 5. The present application has simple and compact structure, which can meet the requirements of customers and installation space, and facilitate the arrangement of other structures in the installation space. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0019] Figure 1 is the overall structure schematic diagram of the column pipe and the support sleeve assembled according to the embodiment of the present application;

[0020] Figure 2 is the overall explosion structure schematic diagram of the tooth stone according to the embodiment of the present application;

[0021] Figure 3 is the overall rear view of the tooth stone according to the embodiment of the present application;

[0022] Figure 4This is a general sectional view of the dental cartilage provided in an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the energy-absorbing sheet and C-shaped support provided in the embodiment of the present invention being installed on the column tube;

[0024] Figure 6 This is an exploded view of the energy-absorbing sheet, C-shaped support, and column tube provided in the embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the cam block structure provided in an embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the energy-absorbing sheet structure provided in an embodiment of the present invention;

[0027] Figure 9 This is a partial enlarged view of the handle in the closed state provided in an embodiment of the present invention;

[0028] Figure 10 This is a schematic diagram of the overall structure of the handle in the closed state provided in an embodiment of the present invention;

[0029] Figure 11 This is a schematic diagram of the structure of the non-toothed stone holder with the handle in the closed state provided in an embodiment of the present invention;

[0030] Figure 12 This is a schematic diagram of the overall structure of the handle in the open state provided in an embodiment of the present invention;

[0031] Figure 13 This is a partial enlarged view of the handle in the open state provided in an embodiment of the present invention;

[0032] Figure 14 This is a schematic diagram of the structure of a toothed stone holder with the handle in the open state, provided in an embodiment of the present invention.

[0033] Reference numerals: 1. Column tube; 2. C-shaped support; 3. Energy-absorbing plate; 3. Upper plane; 3-1. Lower plane; 3-2. Bending point; 3-3. Flanged edge; 3-4. Braking boss; 3-5. Clearance hole; 3-6. Toothed structure; 4. Support sleeve; 5. Toothed stone assembly; 6. Toothed stone frame; 6-1. Toothed stone frame body; 6-1-1. Connecting part; 6-1-2. Toothed stone sub-assembly; 6-2. Toothed stone; 6-2-1. Toothed stone body; 6-2-1-1. Toothed stone platform; 6. -2-1-2, blind hole 6-2-1-3, slot 6-2-1-4, toothed part 6-2-1-5, small spring 6-2-2, toothed stone shaft 6-2-3, limit pin 6-2-4, large spring 6-3, toothed stone cap 6-4, cam block 7, handle connecting part 7-1, toothed stone pressing part 7-2, boss 7-3, flat area 7-3-1, buffer zone 7-3-2, pressing area 7-3-3 and handle shaft 8. DETAILED DESCRIPTION

[0034] The specific embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0035] As shown in Figure 1 , Figure 9 and Figure 13 , a collapse structure of a steering column comprises a C-shaped support 2, an energy-absorbing sheet 3, a toothed stone assembly 6 and a cam block 7. One side of a column tube 1 is provided with the C-shaped support 2. The outer part of one end of the C-shaped support 2 is provided with the energy-absorbing sheet 3. The C-shaped support 2 is used to support the energy-absorbing sheet 3. As shown in Figure 8 , the energy-absorbing sheet 3 comprises an upper plane 3-1, a lower plane 3-2 and a bending part 3-3. The upper plane 3-1 is connected with the lower plane 3-2 through the bending part 3-3. The lower plane 3-2 of the energy-absorbing sheet 3 is connected with the column tube 1 through a bolt. The upper plane 3-1 is connected with the C-shaped support 2 through a rivet. The longitudinal two sides of the upper plane 3-1 are provided with stepped flanges 3-4 extending to the direction of the lower plane 3-2. The opposite two sides of the end of the lower plane 3-2 away from the bending part 3-3 are provided with brake bosses 3-5. The brake bosses 3-5 are located at the steps of the stepped flanges 3-4. The mutual cooperation of the brake bosses 3-5 and the flanges 3-4 can prevent the steering column from moving to the direction of the driver when collapse occurs. The end of the lower plane away from the bending part 3-3 is provided with an avoiding hole 3-6. The avoiding hole 3-6 can avoid the rivet, so that the upper plane 3-1 of the energy-absorbing sheet 3 is connected with the C-shaped support 2 through the rivet. The outer wall of the upper plane 3-1 is provided with a toothed structure 4 with bidirectional teeth. The bidirectional teeth of the toothed structure 4 are cooperated with the toothed stone assembly 6, so that the column tube 1 is in a clamped state or realizes the length adjustment function. The column tube 1 provided with the C-shaped support 2 and the energy-absorbing sheet 3 is sleeved with a support sleeve 5. The support sleeve 5 can be an aluminum cast tube. The side of the support sleeve 5 opposite to the toothed structure 4 is provided with the toothed stone assembly 6. One end of the toothed stone assembly 6 penetrates through the support sleeve 5 and is cooperated with the bidirectional teeth of the toothed structure 4. The other end of the toothed stone assembly 6 is exposed outside the support sleeve 5 and is in contact with the cam block 7. The cam block 7 is connected with a handle shaft 8. The rotation of the handle shaft 8 drives the rotation of the cam block 7. The rotation of the cam block 7 extrudes the toothed stone assembly 6 and the toothed structure 4 to engage or separate.

[0036] As shown in Figures 2-4As shown, the tooth stone assembly 6 comprises a tooth stone frame 6-1, a tooth stone subassembly 6-2 and a large spring 6-3, the tooth stone frame 6-1 comprises a tooth stone frame body 6-1-1, opposite sides of the tooth stone frame body 6-1-1 are provided with connecting parts 6-1-2, the connecting parts 6-1-2 are connected to one side of the support sleeve 5 by bolts, the tooth stone frame body 6-1-1 is provided with a through hole, the tooth stone subassembly 6-2 is arranged in the through hole, the tooth stone subassembly 6-2 comprises a tooth stone 6-2-1, the tooth stone 6-2-1 comprises a tooth stone body 6-2-1-1, opposite sides of one end of the tooth stone body 6-2-1-1 close to the tooth stone frame body 6-1-1 are provided with tooth-shaped parts 6-2-1-5, the other end of the tooth stone body 6-2-1-1 is provided with a tooth stone platform 6-2-1-2, the tooth stone body 6-2-1-1 passes through the large spring 6-3 and the through hole in the tooth stone frame body 6-1-1, so that the tooth-shaped parts 6-2-1-5 are matched with the bidirectional tooth pattern of the tooth-shaped structure 4, when the tooth-shaped parts 6-2-1-5 on both sides are engaged with the tooth-shaped structure 4, the column pipe 1 can be in a clamped state, when the tooth-shaped parts 6-2-1-5 are separated from the tooth-shaped structure 4, the length adjustment function of the column pipe 1 is realized, the large spring 6-3 is arranged between the tooth stone platform 6-2-1-2 and the tooth stone frame 6-1, the large spring 6-3 can quickly separate the tooth stone 6-2-1 from the tooth stone frame 6-1, so that the phenomenon that the tooth stone 6-2-1 cannot normally pop up is prevented, the tooth stone body 6-2-1-1 at one end of the tooth stone platform 6-2-1-2 is provided with a blind hole 6-2-1-3, opposite sides of the blind hole 6-2-1-3 are provided with slots 6-2-1-4, a small spring 6-2-2 and a tooth stone shaft 6-2-3 are sequentially arranged in the blind hole 6-2-1-3, opposite sides of the tooth stone shaft 6-2-3 are provided with through holes, a limiting pin 6-2-4 passes through the through holes and the slots 6-2-1-4 to arrange the tooth stone shaft 6-2-3 in the blind hole 6-2-1-3, the limiting pin 6-2-4 and the through holes on the tooth stone shaft 6-2-3 are interference fit, so that the tooth stone shaft 6-2-3 and the limiting pin 6-2-4 are prevented from being separated, the limiting pin 6-2-3 and the slots 6-2-1-4 are clearance fit, so that the limiting pin 6-2-4 connected with the tooth stone shaft 6-2-3 can move up and down along the slot 6-2-1-4 in the shape of a long circular hole under the action of the small spring 6-2-2, one end of the tooth stone shaft 6-2-3 away from the tooth stone frame 6-1 is fixedly connected with a tooth stone cap 6-4, the tooth stone cap 6-4 is made of soft material, so that the noise generated when the tooth stone shaft 6-2-3 rubs against the cam block 7 can be eliminated.

[0037] As Figure 7As shown, the cam block 7 includes a handle connecting portion 7-1 and a toothstone pressing portion 7-2, the handle connecting portion 7-1 has a spline through hole, the cam block 7 is connected to the handle shaft 8 through the spline through hole, one side of the handle connecting portion 7-1 has the toothstone pressing portion 7-2, the toothstone pressing portion 7-2 has a boss 7-3 for pressing the toothstone assembly 6 relative to one side of the toothstone assembly 6, the boss 7-3 includes a flat area 7-3-1, a buffer area 7-3-2 and a pressing area 7-3-3, the flat area 7-3-1 is connected to the pressing area 7-3-3 through the buffer area 7-3-2, the height of the pressing area 7-3-3 is greater than the height of the buffer area 7-3-2, and the height of the buffer area 7-3-2 is greater than the height of the flat area 7-3-1, so that the boss 7-3 forms a handle compression and release area from high to low, when the handle is closed, it will drive the handle shaft 8 to rotate, the handle shaft 8 rotates to drive the cam block 7 to rotate, the cam block 7 rotates to make the toothstone assembly 6 slide from the flat area 7-3-1 to the pressing area 7-3-3 through the buffer area 7-3-2, because the pressing area 7-3-3 is higher than the flat area 7-3-1, the magnet assembly 6 is engaged with the tooth-shaped structure 4, so that the column pipe 1 is in a clamped state, when the handle is opened, the handle shaft 8 will drive the cam block 7 to rotate, at this time the toothstone assembly 6 slides from the pressing area 7-3-3 to the flat area 7-3-1, because the flat area 7-3-1 is lower than the pressing area 7-3-3, the toothstone assembly 6-2 is separated from the tooth-shaped structure 4 under the action of the large spring 6-3, realizing the length adjustment function of the column pipe 1.

[0038] Working process

[0039] When the handle is opened, the handle rotation will drive the handle shaft 8 to rotate, the handle shaft 8 rotates to drive the cam block 7 to rotate, at this time the flat area 7-3-1 contacts the toothstone assembly 6-2 to release space for the toothstone assembly 6-2, the large spring 6-3 changes from the original compressed state to the stretched state, driving the toothstone assembly 6-2 to separate from the tooth-shaped structure 4, and the steering column realizes the length adjustment function.

[0040] When the handle is closed, the handle rotation drives the handle shaft 8 to rotate, the handle shaft 8 rotates to drive the cam block 7 to rotate, at this time the pressing area 7-3-3 presses the toothstone assembly 6-2 to move in the direction of the tooth-shaped structure 4, and finally engages with the tooth-shaped structure 4, thereby clamping the column pipe 1.

[0041] When the car collides, under the impact of the airbag, the column tube 1 of the steering column will move downward along the AB line of the steering column, while the support sleeve 5 remains stationary, so the tooth assembly 6 connected to the support sleeve 5 remains stationary. Since the tooth 6-2-1 on the tooth assembly 6 is engaged with the toothed structure 4, the upper plane 3-1 of the energy-absorbing sheet 3 with the toothed structure 4 remains stationary, while the lower plane 3-2 of the energy-absorbing sheet 3 connected to the column tube 1 moves downward along the AB line of the steering column. At this time, the upper plane 3-1 and the lower plane 3-2 produce relative motion, causing the rivet connected to the energy-absorbing sheet 3 and the C-shaped support 2 to break and produce a collapse force peak. At the same time, the energy-absorbing sheet 3 produces bending deformation, thereby reducing or avoiding the damage of the steering wheel to the driver in the event of a frontal collision.

[0042] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, and not to limit them; although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the embodiments of the present application.

Claims

1. A collapsible structure for a steering column, characterized in that: Includes a C-shaped support (2), an energy-absorbing plate (3), a toothed stone assembly (6), and a cam block (7). A C-shaped support (2) and an energy-absorbing plate (3) are provided on one side of the column tube (1). The C-shaped support (2) is connected to the upper plane (3-1) of the energy-absorbing plate (3) by rivets. The energy-absorbing plate (3) has a toothed structure (4) with bidirectional teeth. A support sleeve (5) is fitted outside the column tube (1) with the C-shaped support (2) and the energy-absorbing plate (3). A toothed stone assembly (6) is provided in the through hole on the side of the support sleeve (5) opposite to the toothed structure (4). One end of the toothed stone assembly (6) passes through the support sleeve (5) and meshes with the bidirectional teeth of the toothed structure (4). The other end of the toothed stone assembly (6) contacts the cam block (7). The cam block (7) is provided on the handle shaft (8). The energy-absorbing sheet (3) includes an upper plane (3-1), a lower plane (3-2), and a bend (3-3). The upper plane (3-1) is connected to the lower plane (3-2) through the bend (3-3). The energy-absorbing sheet (3) is connected to the column tube (1) through the lower plane (3-2). The upper plane (3-1) has stepped flanges (3-4) extending downward to the lower plane (3-2) on both longitudinal sides. The lower plane (3-2) has braking bosses (3-5) on opposite sides at the end away from the bend (3-3). The braking bosses (3-5) abut against the steps of the stepped flanges (3-4). The lower plane has a clearance hole (3-6) at the end away from the bend (3-3).

2. The crumple zone structure of a steering column according to claim 1, characterized in that: The toothed stone assembly (6) includes a toothed stone frame (6-1), a toothed stone sub-assembly (6-2), and a large spring (6-3). The toothed stone frame (6-1) includes a toothed stone frame body (6-1-1). The toothed stone frame body (6-1-1) has connecting parts (6-1-2) on opposite sides. The toothed stone frame (6-1) is connected to one side of the support sleeve (5) through the connecting parts (6-1-2). The toothed stone frame body (6-1-1) has a through hole. The toothed stone sub-assembly (6-2) is provided in the through hole. The large spring (6-3) is provided between the toothed stone sub-assembly (6-2) and the toothed stone frame (6-1).

3. The collapsible structure of a steering column according to claim 2, characterized in that: The toothed stone sub-assembly (6-2) is provided with a toothed stone cap (6-4) at the end away from the toothed stone frame (6-1).

4. A collapsible structure for a steering column according to claim 2 or 3, characterized in that: The toothed stone assembly (6-2) includes a toothed stone (6-2-1), which includes a toothed stone body (6-2-1-1). The toothed stone body (6-2-1-1) has toothed portions (6-2-1-5) on both sides of one end near the toothed stone frame body (6-1-1). These toothed portions (6-2-1-5) engage with the bidirectional teeth of the toothed structure (4). The toothed stone body (6-2-1-1) passes through a large spring (6-3) and is located within the through hole of the toothed stone frame body (6-1-1). The other end of the toothed stone body (6-2-1-1) has a toothed stone platform (6-2-1-2). The toothed stone body (6-2-1-1) with a toothed stone platform (6-2-1-2) rests against the large spring (6-3). It has a blind hole (6-2-1-3) on one end. The blind hole (6-2-1-3) has slots (6-2-1-4) on opposite sides. The small spring (6-2-2) and the toothed stone shaft (6-2-3) are arranged in sequence in the blind hole (6-2-1-3). The toothed stone shaft (6-2-3) has through holes on opposite sides. The limiting pin (6-2-4) passes through the through holes and the slots (6-2-1-4) to set the toothed stone shaft (6-2-3) in the blind hole (6-2-1-3) and can move up and down along the slots (6-2-1-4).

5. The crumple zone structure of a steering column according to claim 1, characterized in that: The cam block (7) includes a handle connecting part (7-1) and a toothed stone pressing part (7-2). The handle connecting part (7-1) has a spline through hole. The cam block (7) is connected to the handle shaft (8) through the spline through hole. The handle connecting part (7-1) has a toothed stone pressing part (7-2) on one side. The toothed stone pressing part (7-2) has a boss (7-3) on the side opposite to the toothed stone assembly (6) for pressing the toothed stone assembly (6).

6. The crumple zone structure of a steering column according to claim 5, characterized in that: The boss (7-3) includes a flat area (7-3-1), a buffer zone (7-3-2), and a pressing area (7-3-3). The flat area (7-3-1) is connected to the pressing area (7-3-3) through the buffer zone (7-3-2). The height of the pressing area (7-3-3) is greater than the height of the buffer zone (7-3-2), and the height of the buffer zone (7-3-2) is greater than the height of the flat area (7-3-1), so that the boss (7-3) forms a handle pressing and releasing area from high to low.

Images