Automobile electric appliance plug-in terminal connector

Abstract

The utility model discloses an automobile electric appliance plug-in terminal connector, which comprises a shell, at least one plug-in terminal, a circuit board and at least one elastic connecting piece, an installation cavity is formed in the shell, one end of the plug-in terminal is fixedly connected with the shell, and the other end of the plug-in terminal is connected with the elastic connecting piece in an inserted mode. The plugging direction of the plug-in terminal and the elastic connecting piece is a first direction; the circuit board is arranged in the mounting cavity, and at least one connecting hole formed in the first direction is formed in the circuit board; the elastic connecting piece is arranged in the connecting hole in the first direction, the outer side of the elastic connecting piece abuts against the inner side face of the connecting hole, a connecting cavity is defined by the inner side of the elastic connecting piece in the first direction, a connecting port is formed in the connecting cavity, and the plug-in terminal penetrates through the connecting port to be inserted into the connecting cavity. According to the utility model, the plug-in terminal and the elastic connecting piece as well as the elastic connecting piece and the circuit board are connected in a plug-in manner, so that the assembly is convenient, the process difficulty is reduced, and the manufacturing cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric connectors, in particular to an automotive electrical appliance plug-in terminal connector. Background Art

[0002] The electrical connection between the circuit board and the plug-in terminal of the shell of the electronic product is usually made by soldering. Specifically, a hole is made in the circuit board, and the terminals of the connector are inserted and then soldered to achieve electrical connection, or a flexible board is used to solder the circuit board and the connector terminals to achieve electrical connection.

[0003] This traditional solder connection structure has little impact on civilian electronic products, but it has defects in automotive electronic components. In environments such as severe vibration and falling, the deformation of the circuit board and the housing may cause the welding to break, resulting in product connection failure. Utility Model Content

[0004] The utility model aims to overcome the above technical deficiencies and provide an automotive electrical appliance plug-in terminal connector, which is used to solve the problem of low reliability of the connection method of automotive electrical appliances using welding in the prior art.

[0005] In order to achieve the above technical objectives, the technical solution of the utility model is as follows: an automotive electrical plug-in terminal connector, comprising a shell, at least one plug-in terminal, a circuit board and at least one elastic connector, wherein: the shell forms an installation cavity, one end of the plug-in terminal is fixedly connected to the shell, and the other end is plugged into the elastic connector, so that the plug-in direction of the plug-in terminal and the elastic connector is a first direction; the circuit board is arranged in the installation cavity, and the circuit board has at least one connecting hole formed along the first direction; the elastic connector is arranged in the connecting hole along the first direction, and the outer side of the elastic connector abuts against the inner side of the connecting hole, and the inner side is enclosed along the first direction to form a connecting cavity, the connecting cavity has a connecting port, and the plug-in terminal passes through the connecting port and is inserted into the connecting cavity.

[0006] Preferably, the elastic connecting member includes a stop portion and a plurality of spring sheets, the plurality of spring sheets are arranged around the first direction and connected to the stop portion, the spring sheet includes a first connecting portion, a second connecting portion and a third connecting portion which are connected in sequence in the reverse direction along the first direction, the first connecting portion is connected to the stop portion, the inner side of the first connecting portion abuts against the plug-in terminal, the outer side of the second connecting portion abuts against the inner side of the connecting hole, at least one of the third connecting portions is bent outward, and the inner side of at least one of the third connecting portions abuts against the plug-in terminal.

[0007] Preferably, the plug-in terminal is interference fit with the connecting cavity.

[0008] Preferably, the inner side of the connecting cavity bulges inward to form a boss.

[0009] Preferably, the connecting port is trumpet-shaped.

[0010] Preferably, the elastic connector includes an elastic connector body, a first bending portion, a second bending portion, a third bending portion and a fourth bending portion, wherein: the first bending portion, the second bending portion, the third bending portion and the fourth bending portion are arranged in sequence around the first direction, the first bending portion is fixedly connected to the second bending portion and the fourth bending portion respectively, the second connecting portion is fixedly connected to the third connecting portion, and at least one of the first bending portion, the second bending portion, the third bending portion and the fourth bending portion is fixedly connected to the elastic connector body; the elastic connector body, the first bending portion, the second bending portion, the third bending portion and the fourth bending portion together form the connecting cavity.

[0011] Preferably, bosses are formed on the sides of the first bending portion and the third bending portion that are close to each other.

[0012] Preferably, the first bending portion, the second bending portion, the third bending portion and the fourth bending portion are bent outwardly away from one side of the elastic connector body to form a bell mouth.

[0013] Compared with the prior art, the beneficial effects of the utility model include: the plug-in terminal and the elastic connector, as well as the elastic connector and the circuit board, are connected by plugging, which is convenient for assembly, reduces the process difficulty, saves manufacturing costs, and does not use welding connection, which is easy to disassemble. The plug-in terminal and the elastic connector, as well as the elastic connector and the circuit board, all achieve interference fit, and the connection is tight and reliable, which can effectively avoid failure of the electrical connection caused by vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is an exploded view of the automotive electrical plug-in terminal connector provided by the utility model;

[0015] Figure 2 It is a cross-sectional view of the automotive electrical appliance plug-in terminal connector provided by the utility model;

[0016] Figure 3 It is a three-dimensional diagram of the elastic connector of the automotive electrical plug-in terminal connector embodiment 1 provided by the utility model;

[0017] Figure 4 It is a partial cross-sectional view of the embodiment 1 of the automotive electrical appliance plug-in terminal connector provided by the utility model;

[0018] Figure 5It is another partial cross-sectional view of the embodiment 1 of the automotive electrical plug-in terminal connector provided by the utility model;

[0019] Figure 6 It is a three-dimensional diagram of the elastic connector of the second embodiment of the automotive electrical plug-in terminal connector provided by the utility model;

[0020] Figure 7 It is another stereoscopic view of the elastic connector of Embodiment 2 of the automotive electrical appliance plug-in terminal connector provided by the utility model.

[0021] Figure markings: 1-shell, 2-plug-in terminal, 3-circuit board, 4-elastic connector, 5-installation cavity, 31-connecting hole, 41-connecting cavity, 42-connecting port, 43-stop portion, 44-spring, 45-elastic connector body, 46-first bending portion, 47-second bending portion, 48-third bending portion, 49-fourth bending portion, 44a-first connecting portion, 44b-second connecting portion, 44c-third connecting portion. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] Embodiment 1:

[0024] See also Figure 1 and Figure 2 This embodiment provides an automotive electrical plug-in terminal connector, comprising a housing 1, at least one plug-in terminal 2, a circuit board 3 and at least one elastic connector 4, wherein:

[0025] The housing 1 forms a mounting cavity 5 for mounting the plug-in terminal 2 , the circuit board 3 and the elastic connector 4 .

[0026] See also Figure 2 and Figure 3 One end of the plug-in terminal 2 is fixedly connected to the housing 1. The plug-in terminal 2 and the housing 1 can be plugged together or integrally formed by injection molding. The other end of the plug-in terminal 2 is plugged into the elastic connector 4. The plug-in terminal 2 and the elastic connector 4 are plugged in the first direction. The plug-in terminal 2 and the connection cavity 41 are interference fit. Specifically, the inner side of the connection cavity 41 protrudes inward to form a boss. When the plug-in terminal 2 is inserted into the elastic connector 4 along the first direction, it contacts the boss, and the plug-in terminal 2 and the boss are squeezed against each other, thereby forming an interference fit.

[0027] The circuit board 3 is disposed in the mounting cavity 5 . The circuit board 3 defines at least one connection hole 31 . The connection hole 31 is formed along a first direction. To facilitate the formation of the connection hole 31 , the connection hole 31 is generally defined in a direction perpendicular to the circuit board 3 .

[0028] See also Figure 4 and Figure 5 , the elastic connector 4 is arranged in the connection hole 31 along the first direction, and the outer side of the elastic connector 4 abuts against the inner side of the connection hole 31 to realize the electrical connection between the elastic connector 4 and the circuit board 3. The inner side of the elastic connector 4 is surrounded along the first direction to form a connection cavity 41. The connection cavity 41 has a connection port 42. The plug-in terminal 2 passes through the connection port 42 and is inserted into the connection cavity 41. The elastic connector 4 abuts against the connection hole 31. The plug-in terminal 2, the elastic connector 4 and the circuit board 3 are assembled in sequence along the same direction. The elastic connector 4 includes a stopper 43 and a plurality of spring sheets 44. The number of spring sheets 44 can be set according to the shape of the plug-in terminal 2. In this embodiment, the cross-section of the plug-in terminal 2 is rectangular, and each elastic connector 4 has four spring sheets 44. A plurality of spring pieces 44 are arranged around the first direction and connected to the stopper 43. The spring pieces 44 include a first connection part 44a, a second connection part 44b and a third connection part 44c which are sequentially connected in the reverse direction of the first direction. The first connection part 44a is connected to the stopper 43. The inner side of the first connection part 44a abuts against the plug-in terminal 2 to form an electrical connection. The outer side of the second connection part 44b abuts against the inner side of the connection hole 31 to form an electrical connection. At least one third connection part 44c is bent outward to form a bell mouth. When the elastic connector 4 moves until the third connection part 44c abuts against the circuit board 3, the third connection part 44c can limit the elastic connector 4 from continuing to move in the first direction to form a limit. The inner side of at least one third connection part 44c abuts against the plug-in terminal 2 to form an electrical connection. In order to ensure the reliability of the connection hole 31 and the elastic connector 4 after installation, the connection hole 31 and the plurality of second connection parts 44b are interference fit, and because the first connection part 44a needs to pass through the connection hole 31. For this purpose, a "broken line" structure is adopted between the first connection part 44a and the second connection part 44b, and after assembly, the outer width of the second connection part 44b is greater than the outer width of the first connection part 44a.

[0029] As a preferred embodiment, the connection opening 42 is trumpet-shaped, so as to facilitate the insertion of the plug-in terminal 2 into the connection cavity 411 .

[0030] See also Figure 1 and Figure 4The following is a brief description of the assembly process of the automotive electrical plug-in terminal connector provided by this embodiment: First, the plug-in terminals 2 are respectively inserted into the elastic connectors 4. At this time, the stopper 43 abuts against the plug-in terminals 2 to form an electrical connection. Then, the circuit board 3 is moved and the bottom of the elastic connector 4 is inserted into the connecting holes 31 one by one. During the movement, the second connecting portion 44b is squeezed inward by the connecting hole 31, driving the elastic sheet 44 to deform as a whole, and the outer side of the second connecting portion 44b abuts against the inner side of the connecting hole 31 to form an electrical connection, until at least one third connecting portion 44c bent outward abuts against the circuit board 3, limiting the further movement of the elastic connector 4. After the assembly is completed, at least one third connection part 44c is in contact with the plug-in terminal 2 to form an electrical connection. In this embodiment, the spring pieces 44 on the opposite sides are paired, and the third connection parts 44c of one pair of spring pieces 44 are bent outward, and the third connection parts 44c of the other pair of spring pieces 44 are in contact with the plug-in terminal 2 to form an electrical connection. Since the cross-section of the plug-in terminal 2 and the elastic connector 4 in contact with each other in this embodiment is consistent, the inner width of this pair of spring pieces 44 is smaller than the outer width of the two second connection parts 44b, and the third connection parts 44c and the second connection parts 44b of this pair of spring pieces 44 can also be connected in a "broken line" shape. The plug-in terminal 2 and the elastic connector 4 must be made of conductive materials to achieve the electrical connection between the plug-in terminal 2 and the circuit board 3.

[0031] Embodiment 2:

[0032] Embodiment 2 is basically the same as Embodiment 1 and will not be described in detail here. The difference is that:

[0033] See also Figure 6 and Figure 7 The elastic connector 4 includes an elastic connector body 45, a first bending portion 46, a second bending portion 47, a third bending portion 48 and a fourth bending portion 49, which are sequentially arranged around the first direction, the first bending portion 46 is fixedly connected to the second bending portion 47 and the fourth bending portion 49 respectively, the second connecting portion 44b is fixedly connected to the third connecting portion 44c, and at least one of the first bending portion 46, the second bending portion 47, the third bending portion 48 and the fourth bending portion 49 is fixedly connected to the elastic connector body 45. In this embodiment, the first bending portion 46 is fixedly connected to the elastic connector body 45. The elastic connector body 45, the first bending portion 46, the second bending portion 47, the third bending portion 48 and the fourth bending portion 49 are surrounded to form a connecting cavity 41. With this structure, the elastic connector 4 can be formed by only stamping, shearing and bending, which greatly reduces the process difficulty and saves manufacturing costs.

[0034] As a preferred embodiment, bosses are formed on the sides of the first bending portion 46 and the third bending portion 48 that are close to each other, and their function is to form an interference fit with the plug-in terminal 2. Preferably, the bosses can be formed by stamping on the sides of the first bending portion 46 and the third bending portion 48 that are away from each other.

[0035] As a preferred embodiment, the first bending portion 46, the second bending portion 47, the third bending portion 48 and the fourth bending portion 49 are bent outward away from the side of the elastic connector body 45 to form a bell mouth, so as to facilitate the insertion of the plug-in terminal 2 into the connecting cavity 41. When the elastic connector 4 is assembled with the circuit board 3, the elastic connector 4 moves toward the connecting hole 31, and the first bending portion 46, the second bending portion 47, the third connecting portion 44c and the fourth bending portion 49 are squeezed by the connecting hole 31 and bent inward, and the bell mouth shrinks until it abuts against the plug-in terminal 2, thereby increasing the contact area between the elastic connector body 45, the first bending portion 46, the second bending portion 47 and the fourth bending portion 49 and the plug-in terminal 2, thereby improving the connection reliability.

[0036] In summary, the automotive electrical plug-in terminal connector provided by the utility model, the plug-in terminal 2 and the elastic connector 4, as well as the elastic connector 4 and the circuit board 3, all adopt a plug-in connection method, which is convenient to assemble, reduces the process difficulty, saves manufacturing costs, and does not adopt a welding connection method, which is easy to disassemble. The plug-in terminal 2 and the elastic connector 4, as well as the elastic connector 4 and the circuit board 3, all achieve interference fit, and the connection is tight and reliable, which can effectively avoid the failure of the electrical connection caused by vibration. The circuit board 3 is tightly connected to the plug-in terminal 2, which realizes the precise positioning of the circuit board 3, and there is no need to fix the circuit board 3 in advance, which reduces the process links and simplifies the assembly process.

[0037] The above specific implementation methods of the utility model do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. An automotive electrical plug-in terminal connector, characterized in that: It includes a housing, at least one plug-in terminal, a circuit board and at least one elastic connector, wherein: The housing forms a mounting cavity, one end of the plug-in terminal is fixedly connected to the housing, and the other end is plugged into the elastic connector, so that the plug-in terminal and the elastic connector are plugged in a first direction; The circuit board is arranged in the installation cavity, and the circuit board is provided with at least one connection hole formed along the first direction; The elastic connector is arranged in the connecting hole along the first direction, and the outer side of the elastic connector abuts against the inner side of the connecting hole, and the inner side is surrounded along the first direction to form a connecting cavity, the connecting cavity has a connecting port, and the plug-in terminal passes through the connecting port and is inserted into the connecting cavity.

2. The automotive electrical plug-in terminal connector according to claim 1, characterized in that: The elastic connecting member includes a stopper and a plurality of spring sheets, the plurality of spring sheets are arranged around the first direction and connected to the stopper, the spring sheet includes a first connecting portion, a second connecting portion and a third connecting portion which are sequentially connected in the reverse direction along the first direction, the first connecting portion is connected to the stopper, the inner side of the first connecting portion abuts against the plug-in terminal, the outer side of the second connecting portion abuts against the inner side of the connecting hole, at least one of the third connecting portions is bent outward, and the inner side of at least one of the third connecting portions abuts against the plug-in terminal.

3. The automotive electrical plug-in terminal connector according to claim 1, characterized in that: The plug-in terminal is interference-fitted with the connecting cavity.

4. The automotive electrical plug-in terminal connector according to claim 3, characterized in that: The inner side of the connecting cavity protrudes inward to form a boss.

5. The automotive electrical plug-in terminal connector according to claim 1, characterized in that: The connecting port is trumpet-shaped.

6. The automotive electrical plug-in terminal connector according to claim 2, characterized in that: The elastic connector includes an elastic connector body, a first bending portion, a second bending portion, a third bending portion and a fourth bending portion, wherein: The first bending portion, the second bending portion, the third bending portion and the fourth bending portion are sequentially arranged around the first direction, the first bending portion is fixedly connected to the second bending portion and the fourth bending portion respectively, the second connecting portion is fixedly connected to the third connecting portion, and at least one of the first bending portion, the second bending portion, the third bending portion and the fourth bending portion is fixedly connected to the elastic connecting member body; The elastic connector body, the first bending portion, the second bending portion, the third bending portion and the fourth bending portion together form the connecting cavity.

7. The automotive electrical plug-in terminal connector according to claim 6, characterized in that: The first bending portion and the third bending portion respectively form bosses on the sides close to each other.

8. The automotive electrical plug-in terminal connector according to claim 6, characterized in that: The first bending portion, the second bending portion, the third bending portion and the fourth bending portion are bent outward away from one side of the elastic connector body to form a bell mouth.

Images