CN111293492A - A waterproof connector for instrument shell - Google Patents

Abstract

A waterproof connector for an instrument shell comprises the instrument shell and a PCB arranged on the inner side of the instrument shell, wherein a connector base used for connecting the PCB with a waterproof female end connector of a wiring harness of an electric vehicle controller is arranged on the instrument shell, the connector base comprises a base main body, a waterproof connector male end which is integrally formed at one end of the base main body and is used for connecting the waterproof female end connector of the wiring harness of the electric vehicle controller, and a boss which is integrally formed in the middle of the periphery of the base main body and is used for limiting, and the plurality of metal needle conductors are fixed at the other end of the base main body, the front ends of the plurality of metal needle conductors penetrate through the instrument shell and are electrically connected with different connection points on a PCB (printed circuit board) arranged on the inner side of the instrument shell, and the other ends of the metal needle conductors are connected with a wire harness waterproof female end connector of the electric vehicle controller through a waterproof connector male end in the base main body, so that the instrument and an external controller can normally communicate. The invention has simple assembly, easy operation, high production efficiency and low production cost.

Description

A waterproof connector for instrument shell

technical field

The invention relates to a connection structure of an instrument housing and a connecting wire harness. In particular, it relates to a waterproof connector for an instrument housing.

Background technique

At present, the instrument housings used in the electric bicycle industry all need to lead out a connecting line, which is connected to the waterproof connector of the whole vehicle wiring harness to achieve the purpose of system connection.

During the production and installation of the traditional instrument housing and the connecting wire, various adhesives are generally used to bond and fix the connecting wire and the instrument casing, and there are many problems. The positioning, glue amount and curing during bonding and fixing all need to be strictly controlled, and any deviation will cause scrap. The use of adhesives is prone to problems such as looseness, waste of adhesives, time-consuming drying of adhesives, and adhesion of adhesives everywhere or to other substances. In addition, the length of the outlet of the connecting line will be different for different models, so that the same product has multiple production types at the same time, which destroys the feasibility of mass production of the product, resulting in extremely low production efficiency, long time consumption, and large waste. This line on the instrument shell not only brings trouble to the production and packaging, but also needs to scrap and replace the entire instrument shell once the wiring harness is damaged during use, resulting in unnecessary waste.

At present, there are two connector solutions on the market that improve the above-mentioned traditional gluing method, but there are still obvious shortcomings; one is that the upper end of the connector base is inserted into the instrument shell using a standard threaded structure, and then a separate nut is used. It is screwed and fixed on the instrument shell. This solution adopts the split nut and bolt fixing method, the operation is relatively complicated, and there is no rotation angle positioning, resulting in the multi-frequency metal needle conductor on the base and the PCB board in actual use. The communication welding jacks are not easy to match and plug, this defect makes this solution unsuitable for mass production; another solution is that the connector base adopts a non-cylindrical structure and is directly inserted into the meter housing through the wall of the meter housing The communication welding jack on the PCB is fixed by welding, which can solve the problem of rotation and positioning matching between the base and the communication welding jack on the PCB. However, since the connector base is directly fixed on the PCB, the connector base When the male end of the conventional waterproof head at the lower end of the seat and the female end of the conventional waterproof head of the other controller end are often plugged and unplugged, all the force is concentrated on the welding point between the PCB and the multi-frequency metal needle conductor on the base. The male and female ends of the head are often plugged and unplugged with great force, which will cause the PCB board to deform and destroy the solder connection of the existing SMD devices, which is easy to cause communication failures. This defect will make this solution unable to be widely promoted. use.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a waterproof connector for an instrument housing which is accurate in rotation and positioning and can greatly improve production efficiency.

The technical scheme adopted in the present invention is: a waterproof connector for an instrument shell, comprising an instrument shell and a PCB circuit board arranged inside the instrument shell, the instrument shell is provided with the PCB circuit board for the instrument shell A connector base connected with the waterproof female end joint of the outlet harness of the electric vehicle controller, the connector base includes a base body, and an integrally formed one end of the base body is used for connecting the electric vehicle The waterproof connector male end of the waterproof female end connector of the controller outlet harness, a boss for limiting integrally formed in the middle of the outer periphery of the base body, and several metal needle conductors fixed on the other end of the base body , the front ends of the several metal needle conductors pass through the meter housing and are electrically connected to different connection points on the PCB circuit board arranged inside the meter housing, and the other ends of the metal needle conductors pass through the base body. The male end of the waterproof connector is connected to the waterproof female end connector of the outlet harness of the electric vehicle controller, so that the instrument can communicate with the external controller normally.

Electrical connection jacks for inserting corresponding metal pin conductors are respectively formed on the connection points on the PCB circuit board used for electrical connection with the external controller, and the metal pin conductors are inserted into the electrical connection jacks and inserted into the electrical connection jacks. It is fixedly connected to the corresponding electrical connection points on the PCB circuit board by soldering.

An external thread is formed on the outer peripheral surface of the base body on the side of the boss adjacent to the instrument shell, and the corresponding instrument shell is sequentially formed with a thread for embedding the boss from the outer side to the inner side. Insert slot, and female thread for threading with male thread on base body.

A silica gel sealing ring is arranged between the boss and the embedding groove.

The rotation angle of the external thread formed on the base body and the internal thread formed on the instrument housing when they are screwed with each other is to ensure that several metal pin conductors are inserted into the electrical connection jacks on the PCB circuit board and are just in the right position. Corresponding circuit connection points, so as to ensure the normal communication between the instrument and the external controller.

The base body is formed with a circle of inner columns whose diameter is smaller than that of the base body on the side adjacent to the metal needle conductors, and the ends of the inner columns are integrally formed with non-circular metal needle conductors for fixing the metal needle conductors. Fixing plate, the maximum width of the metal needle conductor fixing plate is equal to the outer diameter of the base body, so that a groove structure is formed at the inner column of the base body, and the corresponding instrument shell is formed by the outer diameter. Inwardly, there are sequentially formed insertion grooves into which the bosses are inserted, and non-circular through holes having the same shape as the metal pin conductor fixing plate on the base body and capable of penetrating the metal pin conductor fixing plate.

A silica gel sealing ring is arranged between the boss and the embedding groove.

The non-circular metal needle conductor fixing plate and the through hole are oval, triangular or rectangular structures.

The metal needle conductor fixing plate formed on the base body penetrates the non-circular through hole on the instrument case and is rotated to the right or left by a set angle, and several metal needle conductors on the metal needle conductor fixing plate are inserted into The electrical connection jacks on the PCB circuit board are located at the corresponding circuit connection points, and the side wall part of the through hole of the instrument housing is clamped in the groove structure on the base body, so as to ensure the instrument and external control. The device communicates normally.

The invention provides a waterproof connector for an instrument housing, which provides an accurate rotational positioning, an integrated self-contained threaded rotational locking, and in the subsequent use process, the lower end of the conventional waterproof male and female ends are inserted and pulled out of the force point. Between the instrument housing and the base connector, it not only improves the production efficiency, but also avoids the easy damage of the PCB board in the later use process, which causes the communication failure of the instrument housing with a waterproof connector structure. The invention avoids the use of various adhesives, and the number of assembly parts is small. At the same time, the structural design of the invention can realize precise screwing and positioning, and ensure the connection between the conductors on the connector base and the wiring jacks on the PCB circuit board. The precise matching of the product can avoid the offline rework caused by the inaccurate matching and positioning of the conductor and the jack during the production process, as well as the circuit failure caused by the frequent plugging and unplugging of the conventional male and female waterproof heads during the use of the product by consumers. The invention is simple to assemble and easy to operate, greatly improves the production efficiency, reduces the production cost, and is suitable for mass production.

Description of drawings

1 is a schematic diagram of the exploded structure of the first embodiment of a waterproof connector for an instrument housing of the present invention;

2 is a schematic structural diagram of a connector base in the first embodiment of the present invention;

FIG. 3 is a schematic structural diagram of the interior of the instrument housing in the first embodiment of the present invention;

4 is a schematic diagram of the exploded structure of a second embodiment of a waterproof connector for an instrument housing of the present invention;

5 is a schematic structural diagram of a connector base in a second embodiment of the present invention;

Fig. 6 is the top view of Fig. 5;

Fig. 7 is the partial structure schematic diagram of the outer side surface of the instrument housing in the second embodiment of the present invention;

Fig. 8 is the sectional view of Fig. 7;

9 is a schematic structural diagram of the connector base being inserted into the instrument housing and rotated to set the angle according to the second embodiment of the present invention;

FIG. 10 is a plan view of FIG. 9 .

pictured

1: Instrument housing 1.1: Embedded groove

1.2: Female thread 1.3: Through hole

2: PCB circuit board 2.1: Electrical connection jack

3: Connector Base 3.1: Base Body

3.2: Waterproof connector male end 3.3: Boss

3.4: Metal pin conductor 3.5: External thread

3.6: Metal pin conductor fixing plate 3.7: Inner column

3.8: Groove structure 4: Silicone sealing ring

5: Electric vehicle controller outlet harness waterproof female end connector

Detailed ways

A waterproof connector for an instrument housing of the present invention will be described in detail below with reference to the embodiments and the accompanying drawings.

As shown in FIG. 1 and FIG. 2 , a waterproof connector for an instrument casing of the present invention includes an instrument casing 1 and a PCB circuit board 2 arranged inside the instrument casing 1. The instrument casing 1 is provided with useful For the connector base 3 connected with the PCB circuit board 2 and the waterproof female end connector 5 of the electric vehicle controller outlet harness, the connector base 3 includes a base body 3.1, which is integrally formed on the base. One end of the base body 3.1 is used to connect the waterproof connector male end 3.2 of the waterproof female end connector 5 of the electric vehicle controller outlet harness, and a boss 3.3 for limiting is integrally formed in the middle of the outer periphery of the base body 3.1 , and several metal needle conductors 3.4 fixed on the other end of the base body 3.1, the front ends of the several metal needle conductors 3.4 penetrate through the meter housing 1 and the PCB circuit board arranged inside the meter housing 1 The different connection points on 2 are electrically connected, and the other end of the metal needle conductor 3.4 is located in the base body 3.1 through the waterproof connector male end 3.2 to connect the electric vehicle controller outlet harness waterproof female end connector 5, so that the instrument and external control The device communicates normally. The waterproof connector male end 3.2 of the present invention is a detachable universal waterproof connector male end connector 5 used in the electric vehicle industry for connecting the instrument accessories with the electric vehicle controller outlet harness waterproof female end connector 5 in the vehicle. end. The conventional waterproof connector male end 3.2 is used for plug-and-socket connection with the electric vehicle controller outlet harness waterproof female end connector 5 to ensure normal communication between the instrument and the controller; the waterproof connector male end 3.2 Available in the market as general purpose parts.

As shown in FIG. 1 and FIG. 4 , electrical connection jacks 2.1 for inserting corresponding metal pin conductors 3.4 are respectively formed on the connection points on the PCB circuit board 2 for electrical connection with the external controller. The metal needle conductors 3.4 are inserted into the electrical connection jacks 2.1 and fixedly connected to the corresponding electrical connection points on the PCB circuit board 2 by soldering.

As shown in Figures 2 and 3, as the first embodiment of the present invention, an outer thread 3.5 is formed on the outer peripheral surface of the base body 3.1 in the present invention on the side of the boss 3.3 adjacent to the instrument housing 1, Correspondingly, an insertion groove 1.1 for embedding the boss 3.3 and an inner thread 1.2 for screwing with the outer thread 3.5 on the base body 3.1 are sequentially formed on the instrument housing 1 from the outer side to the inner side. A silica gel sealing ring 4 is arranged between the boss 3.3 and the embedding groove 1.1 to ensure that the instrument housing 1 can achieve waterproof sealing inside and outside at the position of the embedding groove 1.1.

The rotation angle of the external thread 3.5 formed on the base body 3.1 and the internal thread 1.2 formed on the instrument housing 1 is to ensure that several metal needle conductors 3.4 are inserted into the electrical connection on the PCB circuit board 2 when they are screwed together. When connecting jack 2.1, it is located at the corresponding circuit connection point, so as to ensure the normal communication between the instrument and the external controller.

As shown in Figure 4, Figure 5, Figure 6, Figure 7, Figure 8, as the second embodiment of the present invention, the base body 3.1 described in the present invention is formed with a circle of diameter on the side adjacent to the metal needle conductor 3.4 Smaller than the inner column 3.7 of the base body 3.1, the end of the inner column 3.7 is integrally formed with a non-circular metal needle conductor fixing plate 3.6 for fixing the metal needle conductor 3.4. The maximum size of the metal needle conductor fixing plate 3.6 The width is equal to the outer diameter of the base body 3.1, so that a groove structure 3.8 is formed at the inner column 3.7 of the base body 3.1. Correspondingly, the instrument housing 1 is formed sequentially from the outside to the inside for embedding. The embedding groove 1.1 of the boss 3.3 and the non-circular through hole 1.3 having the same shape as the metal needle conductor fixing plate 3.6 on the base body 3.1 and capable of penetrating the metal needle conductor fixing plate 3.6. A silica gel sealing ring 4 is arranged between the boss 3.3 and the embedding groove 1.1 to ensure that the instrument housing 1 can achieve waterproof sealing inside and outside at the position of the embedding groove 1.1. The non-circular metal pin conductor fixing plate 3.6 and the through hole 1.3 described in the second embodiment of the present invention may be oval, triangular, rectangular, or the like.

As shown in Fig. 9 and Fig. 10, the metal needle conductor fixing plate 3.6 formed on the base body 3.1 penetrates the non-circular through hole 1.3 on the instrument case 1 and is rotated to the right or left by a set degree. When the metal needle conductors 3.4 on the needle conductor fixing plate 3.6 are inserted into the electrical connection jacks 2.1 on the PCB circuit board 2, they are located at the corresponding circuit connection points. It is embedded in the groove structure 3.8 on the base body 3.1, so as to ensure the normal communication between the instrument and the external controller.

A method of using a waterproof connector for an instrument housing of the present invention:

During the assembly and production process of the instrument, the connector base 3 with the metal needle conductor 3.4 is mounted on the silicone sealing ring 4, and it is directly inserted into the embedding groove 1.1 on the instrument shell 1 by rotation. The cooperation between the inner thread 1.2 in the groove 1.1 and the outer thread 3.5 on the connector base 3 can be tightened to the stop position. The silicone sealing ring 4 is pressed so as to realize the sealing and waterproofing of the inside and outside of the instrument housing at the position of the embedded groove 1.1. Then put the PCB circuit board 2 into the instrument housing 1 according to its positioning requirements, and several metal pin conductors 3.4 on the connector base 3 can be accurately inserted into the electrical connection jacks 2.1 on the PCB circuit board 2, and then click Solder the fixed connection, which completes the assembly of the connector and the instrument end. The standard waterproof connector male end 3.2 on the connector base 3 is then connected to the electric vehicle controller outlet harness waterproof female end connector 5 during the whole vehicle assembly process.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (9)

1. A waterproof connector for an instrument casing, comprising an instrument casing (1) and a PCB circuit board (2) arranged inside the instrument casing (1), the instrument casing (1) being provided with a The connector base (3) connecting the PCB circuit board (2) with the waterproof female end connector (5) of the electric vehicle controller outlet harness is characterized in that the connector base (3) includes a base The base body (3.1) is integrally formed at one end of the base body (3.1) and is used to connect the waterproof connector male end (3.2) of the electric vehicle controller outlet harness waterproof female end connector (5), integrally formed A boss (3.3) for position-limiting in the middle of the outer periphery of the base body (3.1), and several metal needle conductors (3.4) fixed on the other end of the base body (3.1), the number of The front ends of the metal needle conductors (3.4) pass through the meter housing (1) and are electrically connected to different connection points on the PCB circuit board (2) arranged inside the meter housing (1), and the metal needle conductors (3.4) ) in the base body (3.1) through the waterproof connector male end (3.2) to connect the electric vehicle controller outlet harness waterproof female end connector (5), so that the instrument communicates with the external controller normally. 2 . The waterproof connector for an instrument housing according to claim 1 , wherein the connection points used for electrical connection with the external controller on the PCB circuit board ( 2 ) are respectively formed for insertion The corresponding electrical connection jacks (2.1) of the metal pin conductors (3.4), the metal pin conductors (3.4) are inserted into the electrical connection jacks (2.1) and fixedly connected to the PCB circuit board (2) by welding on the corresponding electrical connection points. 3. A waterproof connector for an instrument housing according to claim 1, characterized in that, the outer peripheral surface of the base body (3.1) is located on the boss (3.3) adjacent to the instrument housing ( 1) An external thread (3.5) is formed on one side, and an embedding groove (1.1) for embedding the boss (3.3) is formed on the corresponding instrument housing (1) from the outer side to the inner side in turn, and an embedding groove (1.1) for embedding the boss (3.3) is formed on the corresponding instrument housing (1) in turn. Internal thread (1.2) threaded with external thread (3.5) on base body (3.1). 4 . The waterproof connector for an instrument housing according to claim 3 , wherein a silicone sealing ring ( 4 ) is arranged between the boss ( 3.3 ) and the embedding groove ( 1.1 ). 5 . . 5. A waterproof connector for an instrument housing according to claim 2 or 3, characterized in that the external thread (3.5) formed on the base body (3.1) and the outer thread (3.5) formed on the instrument housing (1) The angle of rotation of the internal threads (1.2) when they are screwed to each other is to ensure that several metal pin conductors (3.4) are inserted into the electrical connection jacks (2.1) on the PCB circuit board (2) just in the corresponding circuit connection point to ensure proper communication between the instrument and the external controller. 6. A waterproof connector for an instrument housing according to claim 1, characterized in that the base body (3.1) is formed with a circle on the side adjacent to the metal needle conductor (3.4) with a diameter smaller than that of the base The inner column (3.7) of the main body (3.1), the end of the inner column (3.7) is integrally formed with a non-circular metal needle conductor fixing plate (3.6) for fixing the metal needle conductor (3.4), the metal The maximum width of the pin conductor fixing plate (3.6) is equal to the outer diameter of the base body (3.1), so that a groove structure (3.8) is formed at the inner column (3.7) of the base body (3.1), corresponding to The instrument housing (1) is formed with an insertion groove (1.1) for embedding the boss (3.3) in sequence from the outside to the inside, and the metal needle conductor fixing plate (3.6) on the base body (3.1) ) non-circular through holes (1.3) of the same shape that can penetrate through the metal pin conductor fixing plate (3.6). 7 . The waterproof connector for an instrument housing according to claim 6 , wherein a silicone sealing ring ( 4 ) is arranged between the boss ( 3.3 ) and the embedding groove ( 1.1 ). 8 . . 8. The waterproof connector for an instrument housing according to claim 6, wherein the non-circular metal needle conductor fixing plate (3.6) and the through hole (1.3) are oval or triangular or rectangular structures. 9. A waterproof connector for an instrument housing according to claim 2 or 6, characterized in that the metal pin conductor fixing plate (3.6) formed on the base body (3.1) penetrates the instrument housing (1) After the non-circular through hole (1.3) on the upper part is rotated to the right or left to set the angle, several metal pin conductors (3.4) on the metal pin conductor fixing plate (3.6) are inserted into the PCB circuit board (2) When the electrical connection jack (2.1) is located at the corresponding circuit connection point, and the side wall part of the through hole (1.3) of the instrument housing (1) is inserted into the groove structure on the base body (3.1) (3.8), so as to ensure the normal communication between the instrument and the external controller.

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