CN220948140U - Steering wheel loudspeaker contact deflection preventing structure - Google Patents

Abstract

The utility model provides a steering wheel horn contact deflection preventing structure, wherein three horn trigger units are integrated on a supporting plate of a steering wheel safety airbag module, an upper contact is arranged on an upper plate surface of the supporting plate corresponding to the exposed part of a lower contact in the horn trigger units, and an anti-rotation convex block corresponding to the upper contact is arranged on the supporting plate adjacent to the side of the upper contact. When the lower contact base in the loudspeaker trigger unit rotates around the fixed pin, the protruding part on the shell of the lower contact base can be blocked by the anti-rotation convex block, so that poor contact between the upper contact and the lower contact caused by the rotation of the lower contact base is avoided, and normal ringing can be ensured when the loudspeaker is pressed.

Description

Steering wheel loudspeaker contact deflection preventing structure

Technical Field

The utility model relates to the technical field of automobile accessories, in particular to a steering wheel horn contact deflection preventing structure.

Background

An automobile steering wheel is one of the most frequently used vehicle parts contacted by a driver, and an automobile steering wheel horn has an important function of warning pedestrians and other vehicles. At present, more floating horn structures are applied to the automobile market, namely a horn triggering unit is integrated on a driver safety airbag module, a return spring is arranged on the horn triggering unit, when the driver presses the safety airbag module, the return spring is compressed, and an upper contact and a lower contact are contacted to transmit a triggering signal to a horn executing unit through a transmission line so as to sound the horn executing unit. When the air bag module is loosened, the air bag module is reset by the return spring, the upper contact and the lower contact are separated, the horn loop is disconnected, and ringing stops.

In order to make the pressing hand feel of the steering wheel loudspeaker more comfortable and reduce the noise of the contact part, technical research and development personnel are more biased to the design structure of flexible connection, and the technical scheme disclosed in the patent entitled "air bag connection structure of steering wheel" (CN 115556699A) comprises a damping unit arranged on a bottom shell of an air bag assembly, a reducing clamping groove adjacent to a conical pin end is arranged on a damping pin body in the damping unit, and the damping unit is inserted into a pipe hole of an installation seat on a framework of the steering wheel. In the technical scheme, the U-shaped terminal in the mounting seat is abutted against the damping pin, and the mounting seat and the components inside the mounting seat are not fixedly connected with the damping pin, namely, the mounting seat can rotate around the damping pin axis under the action of external force. When the steering wheel loudspeaker is pressed in practical application of the product, the mounting seat can deflect to deviate the U-shaped terminal and the contact, so that a circuit cannot be normally connected, and the loudspeaker cannot sound.

Disclosure of utility model

The utility model aims to provide a steering wheel horn contact deflection preventing structure, which ensures that upper and lower contacts of a steering wheel horn can normally contact when the horn is pressed by the arrangement of a deflection preventing convex block.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

The utility model provides a steering wheel loudspeaker contact prevents deflection structure, the layer board has been arranged to the air bag module dorsal part of steering wheel, it has three loudspeaker trigger unit that winds air bag module central symmetry distribution to integrate on the layer board, loudspeaker trigger unit includes the fixed pin of pole rectangular perpendicular to layer board face, overlaps respectively locates the buffer unit, loudspeaker spring and the lower contact base of tube-shape on the fixed pin, and metal banding lower contact runs through in the base shell of lower contact base, lower contact is equipped with two bards in the nozzle department of base shell, go up the contact and arrange on the layer board face corresponding with bards, lower contact and lower contact base constitute spacing cooperation in the circumference around the fixed pin, and lower contact can follow lower contact base synchronous displacement in the axial, be equipped with the protruding portion on the urceolus wall of base shell, the side that is close to the upper contact on the layer board is arranged with the corresponding anti-rotation boss of upper contact.

The utility model mainly sets the corresponding anti-rotation convex block near the side of the upper contact on the supporting plate, when the lower contact base has the trend of rotating around the fixed pin, the protruding part on the lower contact base shell can be blocked by the anti-rotation convex block, namely the anti-rotation convex block limits the freedom degree of the protruding part of the base shell on the horizontal plane, thereby avoiding poor contact of the upper contact and the lower contact caused by the rotation of the lower contact base and ensuring normal ringing when the loudspeaker is pressed.

Drawings

FIG. 1 is an isometric view of a steering wheel airbag module;

FIG. 2 is a schematic illustration of a steering wheel horn contact;

FIG. 3 is an isometric view of the steering wheel airbag module with the lower contact mount removed;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is an isometric view of a steering wheel blade;

fig. 6 is a partial enlarged view at B in fig. 5.

Detailed Description

Referring to the steering wheel horn contact deflection preventing structure shown in fig. 1-6, the airbag module 10 shown in fig. 1 and 3-6 is a view angle shown for convenient observation of deflection preventing and related structures, and in the actual use situation after the assembly, the outer side plate surface of the supporting plate 20 faces away from the roof shed direction, that is, the upper contact 21 is located above the lower contact 42 in the drawing, so that the directions of "up", "down", and the like appearing herein are all default expression directions for convenience of description.

The back side of the airbag module 10 of the steering wheel is provided with a supporting plate 20, three horn trigger units which are symmetrically distributed around the center of the airbag module 10 are integrated on the supporting plate 20, each horn trigger unit comprises a fixed pin 50, a buffer assembly, a horn spring and a cylindrical lower contact base 40, the rod length direction of each fixed pin is perpendicular to the surface of the supporting plate 20, each buffer assembly is sleeved on each fixed pin 50, each lower contact 42 in a metal strip shape penetrates through a base shell 41 of each lower contact base 40, two exposed parts 421 are arranged at a barrel opening of each lower contact 42 in the base shell 41, each upper contact 21 is arranged on the upper surface of the supporting plate 20 corresponding to each exposed part 421, each lower contact 42 and each lower contact base 40 form limit fit in the circumferential direction around each fixed pin 50, each lower contact 42 can synchronously displace along with each lower contact base 40 in the axial direction, each outer barrel wall of the base shell 41 is provided with a protruding part 411, and a rotation preventing boss 30 corresponding to the upper contact 21 is arranged beside the upper contact 21 on the supporting plate 20.

In the above scheme, the airbag module 10 is clamped with the corresponding clamp spring on the steering wheel skeleton through the clamping groove at the tail end of the fixing pin 50, and the supporting plate 20 is integrated with the horn insert 22 for connecting the anode. As shown in fig. 2, the lower contact 42 is made of strip-shaped metal, the lower contact 42 is bent along the wall surface of the nozzle at the edge of the nozzle of the lower contact base 40 to form a exposed part 421, the middle part of the lower contact 42 is annular and is positioned in the bottom of the nozzle of the lower contact base 40, and the middle part of the lower contact 42 is sleeved on the fixing pin 50 and is in abutting contact with the fixing pin 50. The buffer assembly is in abutting engagement with the retaining pin 50, and the lower contact base 40 is in snap engagement with the horn spring and the buffer assembly. In the whole horn trigger unit, the whole body formed by the lower contact 42, the lower contact base 40, the horn spring and the buffer assembly is abutted with the fixed pin 50 instead of being fixedly connected, and the upper contact 21 is fixed on the supporting plate 20, so that the lower contact base 40 can rotate on the axis of the fixed pin 50, and the exposed part 421 of the lower contact 42 is driven to rotate and deviate from the upper contact 21, and a circuit between the upper contact 21 and the lower contact 42 cannot be normally completed when the steering wheel horn is pressed. Therefore, the rotation preventing protrusions 30 corresponding to the upper contacts 21 are disposed on the pallet 20 adjacent to the sides of the upper contacts 21, and the rotation preventing protrusions 30 are adjacent to the upper contacts 21 and do not interfere with the lower contact bases 40. However, if the outer contour of the lower contact base housing 41 is a regular cylinder, the rotation preventing protrusion 30 cannot limit the rotation of the lower contact base 40, so that the protrusion 411 is designed on the outer cylinder wall of the base housing 41 to cooperate with the rotation preventing protrusion 30, when the lower contact base 40 tends to rotate, the rotation path of the protrusion 311 is blocked by the rotation preventing protrusion 30, so that the lower contact base 40 can rotate only in a very small range, and it is ensured that the relative positions of the upper contact 21 and the lower contact 42 cannot deviate greatly to cause circuit disconnection.

In order to facilitate the mating installation of the lower contact 42 and the base housing 41, the exposed portion 421 is disposed at an end portion of the protruding portion 411 on the side close to the pallet 20. The anti-rotation boss 30 is cylindrical overall, the length direction of the column is perpendicular to the plate surface of the supporting plate 20, and one side of the anti-rotation boss 30 facing the protruding portion 411 is a plane. In the above-described embodiment, the lower contact point 42 is inserted into the protruding portion 411 in the plumb direction. Preferably, the protruding portion 411 has a cylindrical shape as a whole, and two protruding portions are symmetrically provided on the lower contact base 40, and the upper and lower cylindrical surfaces of the protruding portion 411 are aligned with the bottom and top surfaces of the lower contact base 40, respectively. The upper cylindrical surface of the cylindrical anti-rotation boss is higher than the lower cylindrical surface of the protruding portion to ensure that the anti-rotation boss 30 can block the protruding portion 411. The side of the rotation preventing protrusion 30 facing the protruding portion 411 is a plane, so that sharp sounds can be prevented when the protruding portion 411 collides with the rotation preventing protrusion 30.

In order to limit the degree of freedom of rotation of the lower contact base 40 about the axis of the fixed pin 50, the two anti-rotation stops 30 beside the same horn trigger unit are located on the same side of the line in which their corresponding two upper contacts 21 are located. In the above-described embodiment, the protrusion 411 is blocked by the rotation preventing boss 30 at the side thereof regardless of whether the rotation tendency of the lower contact base 40 about the axis of the fixing pin 50 is clockwise or counterclockwise. On the contrary, if two rotation preventing protrusions 30 are provided on opposite sides of the straight line where the two upper contacts 21 are located, the rotation preventing pins 30 will limit only one rotation direction of the lower contact base 40, and there is a possibility that the lower contact 42 and the upper contact 21 deviate from each other.

For the convenience of the fixed installation of the anti-rotation convex block 30, a fixed sleeve 31 is arranged on the mounting hole of the supporting plate 20 corresponding to the horn triggering unit, the anti-rotation convex block 30 is fixedly connected to the fixed sleeve 31 through a connecting rod 32, one end of the connecting rod 32 is connected to the cylinder of the anti-rotation convex block 30, and the other end is connected to the outer annular wall of the fixed sleeve 31. The anti-rotation boss 30, the fixing sleeve 31 and the connecting rod 32 are integrally formed through injection molding. In the above scheme, the fixing sleeve 31 is only required to be fixedly arranged on the mounting hole of the supporting plate 20 corresponding to the horn triggering unit, and the position of the anti-rotation convex block 30 is fixed accordingly; in addition, the fixing sleeve 31 also has the function of fixedly mounting the horn trigger unit, so that the assembly process of parts is simplified at the same time.

Claims (6)

1. Steering wheel loudspeaker contact prevents deflection structure, air bag module (10) dorsal part of steering wheel has arranged layer board (20), it has three loudspeaker trigger unit around air bag module (10) central symmetry distribution to integrate on layer board (20), loudspeaker trigger unit includes fixed pin (50) that pole rectangular direction perpendicular to layer board (20) face, the buffer module of cover on fixed pin (50) respectively, loudspeaker spring and tubular lower contact base (40), and metal strip lower contact (42) run through in base shell (41) of lower contact base (40), lower contact (42) are equipped with two bared portion (421) in the nozzle department of base shell (41), go up contact (21) and arrange on the face on layer board (20) corresponding with bared portion (421), its characterized in that: the lower contact (42) and the lower contact base (40) form limit fit in the circumferential direction around the fixed pin (50), the lower contact (42) can synchronously displace in the axial direction along with the lower contact base (40), a protruding part (411) is arranged on the outer cylinder wall surface of the base shell (41), and an anti-rotation convex block (30) corresponding to the upper contact (21) is arranged on the side, close to the upper contact (21), of the supporting plate (20).

2. The steering wheel horn contact deflection preventing structure according to claim 1, wherein: the exposed portion 421 is arranged at an end portion of the protruding portion 411 near the pallet 20 side.

3. The steering wheel horn contact deflection preventing structure according to claim 1 or 2, wherein: two anti-rotation convex blocks (30) beside the same loudspeaker triggering unit are positioned on the same side of two corresponding upper contacts (21).

4. A steering wheel horn contact deflection preventing structure according to claim 3, wherein: the anti-rotation convex block (30) is integrally cylindrical, the length direction of the column is perpendicular to the plate surface of the supporting plate (20), and one side of the anti-rotation convex block (30) facing the protruding part (411) is a plane.

5. A steering wheel horn contact deflection preventing structure according to claim 3, wherein: the support plate (20) is arranged with a fixed sleeve (31) corresponding to the mounting hole of the horn triggering unit, the anti-rotation convex block (30) is fixedly connected with the fixed sleeve (31) through a connecting rod (32), one end of the connecting rod (32) is connected with the anti-rotation convex block (30) column, and the other end is connected with the outer annular wall of the fixed sleeve (31).

6. The steering wheel horn contact deflection preventing structure according to claim 5, wherein: the anti-rotation convex block (30), the fixing sleeve (31) and the connecting rod (32) are integrally formed through injection molding.