CN220661559U

CN220661559U - Sensor in-mold secondary injection molding contact pin structure

Info

Publication number: CN220661559U
Application number: CN202322008268.7U
Authority: CN
Inventors: 王进丁; 王正中; 胡勇杰; 施传敏
Original assignee: Changhui Auto Electrical System Anhui Co ltd
Current assignee: Changhui Auto Electrical System Anhui Co ltd
Priority date: 2023-07-28
Filing date: 2023-07-28
Publication date: 2024-03-26
Anticipated expiration: 2033-07-28

Abstract

The utility model provides a secondary injection molding pin structure in a sensor die, which comprises a plurality of groups of pins, wherein every two adjacent groups of pins are fixedly connected through connecting ribs to form pin rows, the pin rows are connected in a fixing piece in an injection molding mode and then form pin assemblies through connecting rib cutting structures, and the pin assemblies are connected in a shell in an injection molding mode to form plug assemblies. The utility model solves the problem that the positions of the pins are easy to deviate when the plurality of metal pins are subjected to secondary injection molding in the traditional mode.

Description

Sensor in-mold secondary injection molding contact pin structure

Technical Field

The utility model relates to the technical field of connectors, in particular to a sensor in-mold secondary injection molding contact pin structure.

Background

At present, in the existing sensor manufacturing process, a plurality of metal pins of a sensor are directly injection-molded in a plastic shell when the secondary injection molding is carried out, and the injection molding mode is simple. Because the circuit board of some sensors is designed to be smaller, the welding position of the pins and the circuit board is limited by space, and a small welding interval is required to be designed between the pins, so that each pin needs to be made to be thin. And the two ends of the contact pin are inlaid in the mould during injection molding, the middle part of the contact pin is suspended in the cavity of the mould core, when the injection molding is performed in a metal mould with a larger volume, the fast flowing plastic liquid impacts the middle part of the thinner metal contact pin, so that the contact pin can be bent and deformed, the length of the contact pin extending out of a plastic piece after injection molding is inconsistent, the positioning dimensional accuracy error is larger, and the rejection rate is increased. Therefore, there is a need to invent a sensor in-mold overmolding pin structure.

Disclosure of Invention

The utility model aims to provide a secondary injection molding pin structure in a sensor die, which solves the problems that pins are easy to deform and the rejection rate is increased due to larger positioning dimensional accuracy errors of the pins after injection molding when a plurality of thinner metal pins are subjected to secondary injection molding in the traditional mode.

The utility model provides a sensor in-mould secondary contact pin structure of moulding plastics, includes a plurality of groups contact pins, all forms the contact pin row through connecting rib fixed connection between every adjacent two groups contact pins, the contact pin row mould plastics and connect and form the contact pin subassembly through connecting rib cut-off structure after in the mounting, the contact pin subassembly mould plastics and connect and form plug assembly in the shell.

Further, the fixing piece is provided with a cutting groove at the position corresponding to each group of connecting ribs.

Further, the cutting groove is a through groove penetrating through the fixing piece.

Further, a circuit board is arranged in the shell and is electrically connected with the pin assembly.

Further, a plurality of groups of side limiting bosses used for limiting the circuit board are arranged on the inner side wall of the shell.

Further, the lateral limiting bosses are arranged in a triangular mode.

Further, an inner limit boss for limiting the circuit board is arranged in the middle of the inner bottom surface of the shell.

The utility model has the beneficial effects that: the utility model adopts the structure that the connecting ribs are connected with the pins, then the pin area impacted by the plastic liquid is connected and reinforced, the reinforced pins are subjected to secondary injection molding to form the pin assembly, and the pin assembly at the moment can well avoid the problem of pin deflection after being subjected to injection molding with the shell.

The utility model will be described in more detail below with reference to the drawings and examples.

Drawings

Fig. 1 is a block diagram of a plug assembly according to the present utility model.

Fig. 2 is an exploded view of the plug assembly of the present utility model.

Fig. 3 is a block diagram of a pin assembly according to the present utility model.

Fig. 4 is a top perspective view of a pin assembly of the present utility model.

Fig. 5 is a block diagram of a pin row according to the present utility model.

Fig. 6 is a structural diagram of the mold insert with the connecting ribs and the cutting grooves matched during mold opening.

Fig. 7 is a view showing another structure of the connecting rib and the cutting groove when the mold core is opened.

Fig. 8 is a structural view of the insert engaged with the rib and the cutoff groove during mold closing.

Fig. 9 is a structural diagram of the cooperation of the lower mold insert and the pin row.

Detailed Description

The secondary injection molding pin structure in the sensor die shown in fig. 1 to 5 comprises a plurality of groups of pins 1, wherein every two adjacent groups of pins 1 are fixedly connected through connecting ribs 11 to form pin rows, the pin rows are connected in a fixing piece 2 through secondary injection molding and then form pin assemblies through connecting rib cut-off structures, and the pin assemblies are connected in a shell 3 through secondary injection molding to form plug assemblies.

Preferably, in combination with the above scheme, in order to facilitate punching and cutting off the connecting ribs 11, the fixing member 2 is provided with cutting grooves 21 corresponding to each group of connecting ribs 11.

Preferably, in combination with the above solution, in order to facilitate better cutting of the connecting rib 11 and dropping of the scrap, the cutting groove 21 is a through groove penetrating the fixing member 2.

Preferably, in combination with the above solution, in order to be electrically connected to the pin assembly, a circuit board 4 is disposed in the housing 3, and the circuit board 4 is electrically connected to the pin assembly.

Preferably, in combination with the above scheme, in order to facilitate the lifting of the edge of the limiting circuit board 4, a plurality of sets of side limiting bosses 31 for limiting the circuit board 4 are disposed on the inner side wall of the housing 3.

Preferably, in combination with the above solution, the lateral limiting boss 31 is arranged in a triangle shape in order to increase the stability of the limiting structure.

Preferably, in combination with the above scheme, in order to facilitate the lifting of the middle position of the limiting circuit board 4, an inner limiting boss 32 for limiting the circuit board 4 is disposed in the middle of the inner bottom surface of the housing 3.

The novel use method and principle are as follows:

the plug assembly of the utility model is a harness connector connection in an automotive angle sensor. As shown in fig. 5, the pins 1 and the pins 1 are connected through the connecting ribs 11 to form a pin row for reinforcement, and then the reinforced pin row is subjected to primary secondary injection molding to form a pin assembly, wherein the pin 1 is subjected to connection reinforcement in the area of the pins 1 impacted by plastic liquid during injection molding, so that bending deformation of the pins 1 during secondary injection molding can be well avoided;

as shown in fig. 3 and fig. 4, after the injection molding of the pin assembly is completed, the connecting material part (connecting rib 11) of the pin 1 is punched out by using a simple stamping die, and at this time, the pin is already secondarily injection-molded into the pin assembly, and the strength of the pin 1 is not greatly influenced by cutting out the connecting rib 11;

and the contact pin assembly is put into the shell injection mold again to be molded into the plug assembly, and the fracture of the contact pin row cut-off connecting rib 11 is cut off after electroplating, so that the exposed non-electroplated notch can be filled with the plastic of the shell 1, and the adverse problems such as rust and the like can not be caused.

As shown in fig. 6 to 9, in order to enable the structure of the cutoff groove 21 to be injection-molded, the connecting rib 11 is exposed, the upper mold core 5 is disposed at the position of the injection molding cavity in the upper mold, the lower mold core 6 is disposed at the position of the lower mold core 5, the lower end of the upper mold core 5 is provided with a plurality of groups of upper bosses 51 (two groups are disposed in the drawing) according to the number of the cutoff grooves 21, the upper end of the lower mold core 6 is provided with a lower support stand 61 adapted to the cutoff groove 21, the upper end of the lower support stand 61 is provided with a plurality of groups of lower bosses 62 (four groups are disposed in the drawing) corresponding to the position of the upper bosses 51, the left and right gaps between the left and right adjacent lower bosses 62 are adapted to the width of the pin 1, and the gaps between the front and rear adjacent lower bosses 62 are adapted to the width of the connecting rib 11, and meanwhile, the lower end faces of the upper bosses 51 and the upper end faces of the pin row are provided with gaps (as shown in fig. 8). And other structures of the upper and lower mold injection cavities belong to conventional structures in the field, so that the description is omitted.

In the present utility model, all directional indications (such as up, down, left, right, front, rear, etc.) are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture shown in the drawings, and if the particular posture is changed, the directional indication is changed accordingly.

While the utility model has been described above by way of example with reference to the accompanying drawings, it will be apparent that the utility model is not limited to the specific embodiments described above, but is intended to cover various modifications of the method concepts and technical solutions of the utility model, or applications without modifications, as such are within the scope of the utility model.

Claims

1. The utility model provides a sensor in-mould secondary contact pin structure of moulding plastics, includes a plurality of groups contact pin (1), characterized by, all forms the contact pin row through connecting rib (11) fixed connection between every adjacent two groups contact pin (1), the contact pin row mould plastics and connect and form the contact pin subassembly through connecting rib cut-off structure after in mounting (2), the contact pin subassembly mould plastics and connect and form plug subassembly in shell (3).

2. The sensor in-mold secondary injection molding pin structure according to claim 1, wherein the fixing member (2) is provided with a cutting groove (21) corresponding to each group of connecting ribs (11).

3. The sensor in-mold overmolding pin structure of claim 2, wherein the cutoff slot (21) is a through slot penetrating the fixture (2).

4. The sensor in-mold overmolding pin structure of claim 1, wherein a circuit board (4) is disposed in the housing (3), and the circuit board (4) is electrically connected to the pin assembly.

5. The sensor in-mold secondary injection molding pin structure according to claim 4, wherein a plurality of groups of side limiting bosses (31) for limiting the circuit board (4) are arranged on the inner side wall of the shell (3).

6. The in-mold overmolding pin structure of claim 5, wherein the lateral limiting boss (31) is triangularly arranged.

7. The sensor in-mold secondary injection molding pin structure according to claim 4, wherein an inner limit boss (32) for limiting the circuit board (4) is arranged in the middle of the inner bottom surface of the housing (3).