CN106411059A - Vibration motor grounding structure and automobile - Google Patents

Abstract

The invention discloses a grounding structure of a vibration motor and an automobile. The grounding structure of the vibration motor includes a metal bracket, a vibration motor and a metal connector, the vibration motor includes a motor body and a PCB board electrically connected to the terminals of the motor body, the motor body is fixed with the metal bracket, and the A connection hole is provided on the metal bracket; one end of the PCB board is a connection end, and the metal connector is fixed on the connection end, and the metal connector is provided with an outwardly protruding shrapnel, and the connection end and the The metal connecting piece protrudes into the connecting hole, and the elastic piece and the connecting end abut against the inner wall of the connecting hole respectively. In the grounding structure, the metal connector and the PCB board extend into the connection hole of the metal bracket, the contact between the metal connector and the metal bracket is reliable, the grounding effect of the motor is stable, and the metal connector has a simple structure and is easy to assemble.

Description

A vibration motor grounding structure and automobile

technical field

The invention relates to the technical field of motors, in particular to a vibration motor grounding structure and an automobile.

Background technique

The vibration motor of the automobile steering wheel needs good grounding and good electromagnetic compatibility (Electro Magnetic Compatibility, EMC), and the electronic components on the PCB board must be designed with a grounding structure. In the prior art, as shown in Figures 1-6, one end of the PCB board 4' is electrically connected to the terminal on the vibration motor, and the other end is connected to a metal connector 3', which is generally a stepped connector Among the two ends parallel to each other, one end is fixedly connected to the PCB board 4', and the other end is in contact with the casing of the vibrating motor to achieve a grounding effect. One end of the metal connector 3' in contact with the vibration motor has a plurality of bumps 31' protruding from the casing of the vibration motor, and the bumps 31' are in contact with the surface of the vibration motor, so as to realize the grounding design of the electronic components on the PCB board 4' .

However, in this grounding structure, only one end of the PCB board 4' is fixed to the vibrating motor. When the vibrating motor vibrates, it will drive the PCB board 4' to vibrate, thereby causing the metal connector 3' connected to the other end of the PCB board 4' to vibrate. , because the metal connector 3' has no other fixed structure, the contact between the metal connector 3' and the shell of the vibration motor cannot be guaranteed, and a stable grounding effect cannot be guaranteed; in addition, the metal connector 3' only connects with the vibration motor through an arc-shaped arc surface. This grounding structure requires high assembly accuracy of the PCB board 4' and the metal connector 3'. When the error is large, it is easy to cause the bumps to fail to contact the vibration motor shell, which is difficult to assemble.

Contents of the invention

The first object of the present invention is to provide a grounding structure for a vibration motor, which has a reliable grounding effect and is easy to assemble.

For reaching this purpose, the present invention adopts following technical scheme:

A grounding structure of a vibration motor, comprising a metal bracket, a vibration motor and a metal connector, the vibration motor includes a motor body and a PCB board electrically connected to the terminals of the motor body, the motor body is fixed to the metal bracket , the metal bracket is provided with a connection hole; one end of the PCB board is a connection end, and the metal connector is fixed on the connection end, and the metal connector is provided with an outwardly protruding shrapnel, and the connection The end and the metal connector protrude into the connection hole, and the elastic piece and the connection end abut against the inner wall of the connection hole respectively.

Wherein, the metal connecting piece protrudes from the elastic piece in a direction away from the connecting hole.

Wherein, the metal connecting piece is bent downward along the end surface of the connecting end to form a bent edge.

Wherein, the bent edge is an arc surface.

Wherein, the elastic sheet is made by stamping.

Wherein, the metal connector is connected to the PCB board through a rivet.

Wherein, both the metal connector and the PCB board are provided with a first positioning hole and a second positioning hole which are both circular, and the other is provided with a third positioning hole corresponding to the first positioning hole. The hole and the fourth positioning hole corresponding to the second positioning hole, the diameter of the third positioning hole is the same as that of the first positioning hole, and the size of the fourth positioning hole is larger than that of the second positioning hole.

Wherein, the fourth positioning hole is an oval hole.

Wherein, the metal connector is made of beryllium copper.

The second object of the present invention is to provide an automobile in which the grounding effect of the vibration motor is reliable and easy to assemble.

For reaching this purpose, the present invention adopts following technical scheme:

An automobile, including a steering wheel, the above-mentioned grounding structure of the vibration motor is arranged in the steering wheel.

Beneficial effects: the invention provides a grounding structure of a vibration motor and an automobile. The grounding structure of the vibration motor includes a metal bracket, a vibration motor and a metal connector, the vibration motor includes a motor body and a PCB board electrically connected to the terminals of the motor body, the motor body is fixed with the metal bracket, and the A connection hole is provided on the metal bracket; one end of the PCB board is a connection end, and the metal connector is fixed on the connection end, and the metal connector is provided with an outwardly protruding shrapnel, and the connection end and the The metal connecting piece protrudes into the connecting hole, and the elastic piece and the connecting end abut against the inner wall of the connecting hole respectively. In the grounding structure, the metal connector and the PCB board extend into the connection hole of the metal bracket, the contact between the metal connector and the metal bracket is reliable, the grounding effect of the motor is stable, and the metal connector has a simple structure and is easy to assemble.

Description of drawings

Fig. 1 is the assembly drawing of metal connector and PCB board in the prior art;

Fig. 2 is A-A to sectional view among Fig. 1;

Fig. 3 is a partial enlarged view of place B in Fig. 2;

Fig. 4 is a structural schematic diagram of a metal connector in the prior art;

Fig. 5 is a top view of a metal connector in the prior art;

Fig. 6 is a front view of a metal connector in the prior art;

7 is a schematic structural view of the grounding structure of the vibration motor in Embodiment 1 of the present invention;

Fig. 8 is a partial enlarged view of D in Fig. 7;

Fig. 9 is a partial cross-sectional view of the grounding structure of the vibration motor provided in Embodiment 1 of the present invention;

Figure 10 is a partial enlarged view at E in Figure 9;

Fig. 11 is a top view of the assembly of the metal connector and the PCB board provided by Embodiment 1 of the present invention;

Fig. 12 is a partial cross-sectional view of the assembly front view of the metal connector provided in Embodiment 1 of the present invention and the PCB board;

Fig. 13 is a partially enlarged view of C in Fig. 12 .

Fig. 14 is a schematic structural diagram of a metal connector provided in Embodiment 1 of the present invention;

Fig. 15 is a top view of the metal connector provided by Embodiment 1 of the present invention;

Fig. 16 is a front view of the metal connector provided by Embodiment 1 of the present invention;

Fig. 17 is a top view of the PCB board provided by Embodiment 1 of the present invention.

in:

1. Motor body; 2. Metal bracket; 3. Metal connector; 31. Shrapnel; 32. Bending edge; 33. Third positioning hole; 34. Fourth positioning hole; 4. PCB board; 41. First positioning hole; 42, the second positioning hole; 3', the metal connector; 31', the bump; 4', the PCB board.

detailed description

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

Example 1

As shown in Figures 7-17, this embodiment provides a grounding structure for a vibration motor, including a metal bracket 2, a vibration motor and a metal connector 3. The vibration motor includes a motor body 1 and a terminal electrically connected to the motor body 1. PCB board 4, the motor body 1 and the metal bracket 2 are fixed, and the PCB board 4 is used to control the vibration of the vibration motor body 1; a connection hole is provided on the metal bracket 2; one end of the PCB board 4 is a connection end, and the metal connector 3 is fixed on the connection end, the metal connector 3 is provided with an outwardly protruding elastic piece 31, the connecting end and the metal connecting piece 3 extend into the connection hole, and the elastic piece 31 and the connecting end respectively abut against the inner wall of the connection hole to realize the grounding of the vibration motor design.

Compared with the prior art, in this embodiment, the metal bracket 2 is provided with a connection hole for connecting the PCB board 4 and the metal connector 3, and the metal connector 3 is shown in Figure 7, and the metal connector 3 is provided with a shrapnel 31. The elastic piece 31 can be made by stamping or bending. The elastic piece 31 and the metal connecting piece 3 are of an integrated structure, which is simple in structure and easy to manufacture; the elastic piece 31 can also be fixed on the metal connecting piece 3 by welding or the like. The grounding structure extends the connecting end of the metal shrapnel 31 and the PCB 4 into the connecting hole, and the connecting ends of the shrapnel 31 in the metal connector 3 and the connecting end of the PCB 4 abut against the inner wall of the connecting hole to realize the grounding of the vibration motor. Compared with the contact between the bump 31' on the metal connector 3' and the shell of the vibration motor in the prior art, the contact between the metal connector 3 and the metal bracket 2 in this embodiment is reliable, and the grounding effect of the vibration motor is stable. , and the metal connector 3 has a simple structure and is easy to assemble.

In order to facilitate the insertion of the metal connector 3 into the connection hole, as shown in FIG. 9 , the metal connector 3 protrudes out of the elastic piece 31 in a direction away from the connection hole. When the metal connector 3 extends into the connecting hole, the inner wall of the connecting hole squeezes the elastic piece 31 along the side where the elastic piece 31 is connected with the metal connecting member 3 to realize the assembly of the connecting end of the metal connecting member 3 and the PCB board 4 with the connecting hole.

As shown in Figures 11-13, the metal connector 3 and the PCB board 4 can be connected by rivets, and the operation is simple; in order to reduce the manufacturing accuracy and installation accuracy requirements of the metal connector 3 and the PCB board 4, the metal connector 3 and the PCB Both plates 4, one is provided with a first positioning hole 41 and a second positioning hole 42 that are circular, and the other is provided with a third positioning hole 33 corresponding to the first positioning hole 41 and a third positioning hole 33 corresponding to the second positioning hole 42. Corresponding to the fourth positioning hole 34 , the diameter of the third positioning hole 33 is the same as that of the first positioning hole 41 , and the size of the fourth positioning hole 34 is larger than that of the second positioning hole 42 . In this embodiment, as shown in FIG. 8 and FIG. 10 , the metal dome 31 is provided with a third positioning hole 33 and a fourth positioning hole 34 , and the connecting end of the PCB board 4 is provided with a first positioning hole 41 and a second positioning hole 41 . Holes 42, in order to reduce manufacturing accuracy and facilitate installation, the fourth positioning hole 34 is an oval hole, and its size is larger than the second positioning hole 42. The metal connector 3 and the PCB board 4 are guaranteed by the first positioning hole 41 and the third positioning hole 33. The installation accuracy requirements of the grounding structure provide an adjustment range for the installation and positioning of the metal connector 3 and the PCB board 4 through the second positioning hole 42 and the fourth positioning hole 34 .

In addition, in order to facilitate the positioning and fixing of the metal connector 3 and the PCB 4 , as shown in FIG. 13 , the metal connector is bent downward along the end face of the connector to form a bent edge 32 . The bent edge 32 can be an arc surface, so that it can be sleeved at the corner of the connecting end, and the bent edge 32 also facilitates the insertion of the metal connector 3 and the PCB board 4 into the connecting hole. In order to improve the electrical conductivity and mechanical properties of the metal connector 3, the metal connector 3 can be made of beryllium copper, which is the best high-grade elastic material among copper alloys, and has high strength, elasticity, hardness and fatigue strength , Small elastic hysteresis, corrosion resistance, wear resistance, cold resistance, high electrical conductivity, non-magnetic, impact without sparks and a series of excellent physical, chemical and mechanical properties.

Example 2

This embodiment provides an automobile, including a steering wheel, and the grounding structure of the vibration motor provided in Embodiment 1 is arranged in the steering wheel. Compared with the contact between the bump 31' on the metal connector 3' and the shell of the vibration motor in the prior art, the contact between the metal connector 3 and the metal bracket 2 in the grounding structure of the vibration motor is reliable, and the grounding of the motor is reliable. The effect is stable, and the metal connector 3 has a simple structure and is easy to assemble.

The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. limits.

Claims (10)

1. a kind of ground structure of vibrating motor is it is characterised in that include metal rack (2), vibrating motor and metal connecting piece (3), described vibrating motor includes the pcb board (4) that motor body (1) and the terminal with described motor body electrically connect, described electricity Machine body (1) is fixing with described metal rack (2), and described metal rack (2) offers connecting hole；The one of described pcb board (4) Hold as connection end, described metal connecting piece (3) is fixed on described connection end, and described metal connecting piece (3) is provided with outwardly Shell fragment (31), described connection end and described metal connecting piece (3) stretch into described connection in the hole, and described shell fragment (31) and described company Connect end to abut with the inwall of described connecting hole respectively.

2. as claimed in claim 1 a kind of ground structure of vibrating motor it is characterised in that described metal connecting piece (3) edge Described shell fragment (31) is stretched out in direction away from described connecting hole.

3. as claimed in claim 1 a kind of ground structure of vibrating motor it is characterised in that described metal connecting piece (3) edge The end face of described connection end is bent to form downwards bending edge (32).

4. as claimed in claim 3 a kind of ground structure of vibrating motor it is characterised in that described bending edge (32) be arc Face.

5. as claimed in claim 2 a kind of ground structure of vibrating motor it is characterised in that described shell fragment (31) pass through punching press Make.

6. a kind of ground structure of the vibrating motor as described in any one of claim 1-5 is it is characterised in that described metal connects Part (3) passes through rivet interlacement with described pcb board (4).

7. as claimed in claim 6 a kind of ground structure of vibrating motor it is characterised in that described metal connecting piece (3) and Both described pcb boards (4), one is provided with the first location hole (41) being circle and the second location hole (42), and another sets It is equipped with threeth location hole (33) corresponding with described first location hole (41) and corresponding with described second location hole (42) 4th location hole (34), the 3rd location hole (33) is identical with the first location hole (41) diameter, the size ratio of the 4th location hole (34) Second location hole (42) is big.

8. as claimed in claim 7 a kind of ground structure of vibrating motor it is characterised in that described 4th location hole (34) is Elliptical aperture.

9. as claimed in claim 5 a kind of ground structure of vibrating motor it is characterised in that described metal connecting piece (3) by Beryllium copper is made.

10. a kind of automobile, it is characterised in that including steering wheel, is arranged in described steering wheel just like any one of claim 1-9 institute The ground structure of the vibrating motor stated.