CN219495107U - Integral injection molding type camshaft position sensor device - Google Patents

Abstract

A one-piece injection molded camshaft position sensor device has a Hall element, a metal terminal, a one-shot molded part and a two-shot molded part in an integrated configuration. And (3) carrying out hot melt welding on pins of the Hall element and the metal terminal, and fixing the Hall element and the pins of the metal terminal into a circuit integrated piece. The circuit integrated part is formed into a one-time injection molding structural part through injection molding. The primary injection molding structural piece forms a secondary injection molding structural piece integrating the characteristics of the plug hole, the mounting hole, the sealing and the like through an injection molding process. The integral injection molding type camshaft position sensor adopts an integral configuration design thought, solves the problem of excessive sub-parts, reduces the sub-parts to 6 pieces, greatly reduces the product cost and is beneficial to market popularization. The utility model improves the circuit structure, the connecting structure and the plug-in positioning structure of the cam shaft position sensor, thereby reducing the number of the product sub-parts by 60 percent and reducing the cost of the sub-parts by 28 percent.

Description

Integral injection molding type camshaft position sensor device

Technical Field

The utility model relates to automobile part production, in particular to an automobile part camshaft position sensor.

Background

The camshaft position sensor is a very important sensor in a vehicle engine control system. The ignition system of the vehicle, as well as the fuel injection system, requires the sensor to be used together. The camshaft position sensor is generally arranged at the front end of an engine intake and exhaust camshaft cover and is fixed by using a screw. The conventional camshaft position sensor structurally comprises 15 split-type sub-parts, and is high in number and cost, so that the camshaft position sensor is unfavorable for product production and market popularization.

Therefore, there is a need for a product that solves the above-mentioned problems.

Disclosure of Invention

The utility model aims to provide an integral injection molding type camshaft position sensor device, which adopts an integral configuration structure, reduces the number of sub-parts to 6, greatly reduces the product cost and is beneficial to product production and market popularization.

In order to achieve the above object, the present utility model provides a one-piece injection molded camshaft position sensor device including a circuit integral piece including a hall element and a metal terminal. The hall element includes an integrated columnar shoe and sensor circuit board. And three connecting pins of the sensor circuit board vertically extend upwards from one side of the columnar bottom support along the direction vertical to the bottom surface of the columnar bottom support to form a three-fork-shaped connecting pin structure. The sensor circuit board is provided with an integrated built-in filter circuit integrated with corresponding resistor, capacitor and electronic circuit on the internal wafer. The top of the connecting pin is a welding connection point. The metal terminal is of an inverted L-shaped hook body structure, and the bottom of the inverted L-shaped hook body structure is a welding connection point. The welding connection point at the top of the connecting pin is a square bonding pad which is used for welding two ends to be quickly and correctly lapped and positioned. And the welding connection point of each hook body structure and the welding connection point of each connecting pin are mutually welded together, so that the bottom of each metal terminal vertically extends upwards along the extending direction parallel to the corresponding welded connecting pin, and a vertical three-fork structure formed by the connecting pin and the metal terminal is formed. And, the hook body parts at the top of the vertical three fork body structure are parallel to each other, and the hook body parts are provided with chamfers for smoothly inserting the matched female terminals into place.

Preferably, the circuit integrated part is formed into a one-shot molded part by injection molding, and the molded part is an integrated structure of the circuit integrated part and the fixed connection part, and the structure enables the sensor device to have the function of fixing the electric parts. The primary injection molding structural piece is a fixed connecting piece of an E-shaped structure, the main connecting part of the fixed connecting piece is a rectangular hollow upright post, the top of the upright post is provided with a strip-shaped through hole which is perforated along the vertical direction, the top of the through hole extends out of a hook body part of a vertical three-fork body structure, the rectangular hollow upright post of the main connecting part of the middle fixed connecting piece wraps the vertical three-fork body structure, and the bottom of the main connecting part is communicated with a semicircular boss base and the base wraps a Hall element. The middle part of the rectangular hollow upright post is communicated with a semicircular column type decompression boss.

Preferably, a strip-shaped boss structure is fixed at the bottom of the semicircular column boss base. The strip boss structure is used for axially fixing the Hall element, so that the requirement of the detection distance of the sensor is met.

As a preferred mode, an annular groove is formed along the circumferential direction of the bottom of the semicircular column type boss base and is used for radially positioning the hall element, so that the phase precision of the output signal of the sensor is met.

Preferably, the rectangular hollow upright post is a flat column structure, and through holes penetrating through the front side plane are formed in the upper part and the middle part of the back side plane of the flat column structure.

Preferably, the rectangular hollow upright post top has a curved hollow cylinder structure matching the hook shape of the hook portion of the vertical trifurcate structure.

Preferably, the primary injection molding structural member forms a secondary injection molding structural member integrating the characteristics of the plug hole, the mounting hole, the sealing and the like through an injection molding process, the main body of the structural member is of a full-coverage inverted L-shaped cylinder structure, and the structural member is of an integrated structure of the primary injection molding structural member and the secondary injection molding structural member. The semi-cylindrical decompression boss and the semi-cylindrical boss base of the fixed connecting piece of the E-shaped structure are respectively wrapped by a middle bearing cylinder and a bottom bearing semi-cylinder of the inverted L-shaped cylinder structure. A connecting column structure for wrapping the rectangular hollow upright column is communicated between the middle bearing cylinder and the bottom bearing half-column, one side of the connecting column structure is provided with a reinforcing rib for improving the connection strength of the sensor body, and the reinforcing rib is communicated with the middle bearing cylinder and the bottom bearing half-column. The top of this inverted L cylinder structure is provided with cylindric plug groove, and this cylindric plug groove nests in the hook body part outside of vertical trident body structure.

Preferably, a semicircular column type mounting arm is integrally fixed to the middle upper portion of the inverted L-shaped column structure in a lateral extending direction of the opposite side of the cylindrical plug groove, and the semicircular column type mounting arm can clamp the sensor body to be attached to the engine mounting surface.

In a preferred mode, the integral injection molding type camshaft position sensor device further comprises a metal bushing, wherein the metal bushing is nested above the semi-cylindrical pressure reducing boss and used for reinforcing the bonding strength of the plastic part through secondary injection molding, and a screw mounting round hole is formed in the metal bushing and meets the pressure requirement of mounting screws.

In a preferred mode, the integrally molded camshaft position sensor device further comprises an outer sealing ring, wherein the outer sealing ring is sleeved in the circumferential groove of the middle bearing cylinder of the two-shot molded structural part.

Compared with the prior art, the camshaft position sensor adopts an integrated configuration structure, the number of sub-parts is reduced to 6, the product cost is greatly reduced, and the camshaft position sensor is favorable for product production and market popularization.

Compared with the prior art, the utility model has the advantages that the circuit structure, the connecting structure and the plug-in positioning structure of the camshaft position sensor are improved, so that the number of the sub-parts of the product is reduced by 60 percent, and the cost of the sub-parts is reduced by 28 percent. Specifically, the present utility model improves the following aspects:

1. the circuit structure of the utility model is changed from a split structure of the Hall element and the filter circuit in the prior art into an integrated filter circuit structure of the Hall element, thereby greatly simplifying the circuit structure of the sensor. The circuit structure of the sensor adopts an integrated circuit design, the high-integration Hall element U1 is used for replacing the original Hall element U, and the filter circuit-resistor element R1, the capacitor elements C1 and C2 and the circuit are manufactured on the internal wafer of the U1, so that the external filter circuit in the prior art is effectively replaced, on one hand, the conventional design of the sub-parts such as the capacitor C1, the resistor R1, the capacitor C2 and the circuit board are saved, and on the other hand, external plug-in connection is not needed, so that the structural strength of the sensor is effectively improved. The design of the chamfer at the top of the metal terminal has the function of being smoothly inserted into place with the matched female terminal. The middle part of the metal terminal is straight, which is beneficial to improving the productivity and saving the materials. And due to the design of the welding end shape bonding pad of the metal terminal, the welding ends can be quickly and correctly overlapped and positioned, and the welding efficiency is improved.

2. The fixed connecting piece of the E-shaped structure of the primary injection molding structural piece is perfectly nested outside the circuit structure of the inverted L-shaped hook body structure, so that an integrated connection reinforcing structure of the circuit structure is formed, the E-shaped structure body is subjected to 90-degree cladding injection molding, accurate positioning of a secondary injection molding head of a product is facilitated, the product interface precision is improved, the strength of an injection molding finished product is greatly enhanced, and the injection molding failure rate is effectively reduced. The biconvex platform structure of the E-shaped structure body can adjust injection molding pressure, so that dislocation caused by forced deformation and movement of internal parts is avoided. The strip-shaped boss features of the boss base can axially fix the Hall element, so that the requirement of the detection distance of the sensor is met. The annular groove feature of the boss base is beneficial to radially positioning the Hall element, so that the effect of the phase precision characteristic of the output signal of the sensor is met. The metal bushing can strengthen the bonding strength of the plastic part of the product, so that the pressure requirement of the mounting screw can be met. The flat column structure can meet the requirement of filling and flowing of injection molding materials, and the injection molding qualification rate is greatly improved.

3. The secondary injection molding structural member is an integrated full-coverage structure of the primary injection molding structural member and the secondary injection molding structural member, and the main body of the secondary injection molding structural member is an inverted L-shaped cylinder structure, and the structure integrates the characteristics of a plug hole, a mounting hole, sealing and the like. This configuration adds integrated plug slots, mounting arms and reinforcing ribs. The reinforcing rib can save plastics and improve the connection strength of the sensor body. The mounting arm facilitates the function of holding the sensor body against the mounting surface of the engine. The plug slot is beneficial to being matched with the female end slot, so that reliable electric connection between the sensor and an external circuit is ensured. The cylindrical profiling feature of the inverted L-shaped cylinder structure uniformly coats the cylindrical Hall element, and can provide reliable external protection. The cylinder circumference direction at the middle part of the inverted L-shaped cylinder structure is provided with an annular groove which can be tightly attached to and fixed with an annular sealing ring. The annular groove and annular sealing ring structure is beneficial to filling the gap between the sensor and the engine mounting hole.

The utility model has the innovative improvement point that the camshaft position sensor adopts an integrated configuration structure, and the camshaft position sensor is manufactured by using the least number of parts, thereby greatly reducing the cost of products and being beneficial to the production and market popularization of the products.

Drawings

Fig. 1 is a schematic structural view of a prior art camshaft position sensor.

FIG. 2 is a schematic diagram of a first mounting assembly process of a prior art camshaft position sensor.

FIG. 3 is a schematic diagram of a second mounting assembly process of a prior art camshaft position sensor.

FIG. 4 is a schematic diagram of a third mounting assembly process for a prior art camshaft position sensor.

FIG. 5 is a schematic diagram of a fourth mounting assembly process for a prior art camshaft position sensor.

FIG. 6 is a schematic diagram of the overall assembly process of the camshaft position sensor of the present utility model.

Fig. 7 is a circuit diagram of a prior art sensor.

Fig. 8 is a circuit diagram of an improved sensor of the present utility model.

Fig. 9 is a schematic diagram of an installation and combination process of the circuit integrated component of the present utility model.

FIG. 10 is a schematic view of the assembly process of the one shot molded part of the present utility model.

FIG. 11 is a schematic view of the assembly process of the overmolding configuration of the present utility model.

Fig. 12 is a schematic structural diagram of an integrated circuit component according to the present utility model.

Fig. 13 is a schematic view of the structure of the one shot molded part of the present utility model.

Fig. 14 is a schematic structural view of the over-molded part of the present utility model.

FIG. 15 is a schematic structural view of a finished camshaft position sensor formed from an installed overmold configuration of the present utility model.

Detailed Description

Hereinafter, embodiments of the integrally injection molded camshaft position sensor device of the present utility model will be described with reference to the accompanying drawings.

The embodiments described herein are specific embodiments of the present utility model, which are intended to be illustrative and exemplary of the inventive concept, and should not be construed as limiting the scope of the utility model and embodiments of the utility model. In addition to the embodiments described herein, those skilled in the art can adopt other obvious solutions based on the disclosure of the claims and specification of the present application, including those adopting any obvious substitutions and modifications to the embodiments described herein.

The drawings in the present specification are schematic views, which assist in explaining the concept of the present utility model, and schematically show the shapes of the respective parts and their interrelationships. Note that, in order to clearly show the structures of the components of the embodiments of the present utility model, the drawings are not necessarily drawn to the same scale. The same reference numerals are used to designate the same or similar parts. In addition, in the description with reference to the drawings, orientation words such as "upper", "lower", etc. are used for convenience of description, and they do not constitute a specific limitation on the structure of the features.

Fig. 1 shows a structure of a related art camshaft position sensor. As shown in FIG. 1, the conventional camshaft position sensor is split in structure, has 15 sub-parts in total, is more in number and higher in part cost, and is not beneficial to product marketing. The camshaft position sensor in the prior art includes: injection molding material 1', inner sealing ring 2', metal terminal 3', C1 capacitor 4', R1 resistor 5', C2 capacitor 6', circuit board 7', solder 8', soldering flux 9', diluent 10', hall element 11', filler material 12', metal bushing 13', plastic housing 14', outer sealing ring 15'.

Fig. 2 shows a first mounting combination process of a camshaft position sensor of the related art. Fig. 3 shows a second mounting combination process of a camshaft position sensor of the related art. Fig. 4 shows a third mounting combination process of a camshaft position sensor of the related art. Fig. 5 shows a fourth mounting combination process of a camshaft position sensor of the related art.

The assembly steps of the prior art are as follows:

1. as shown in fig. 2, the metal terminals 3 'are fixed in the injection molding material 1' by an injection molding process to form an integral piece a ', the integral piece a' fixing the metal terminals and other electronic parts.

2. As shown in fig. 3, the hall element 11 'and the circuit board 7' are mounted in the set position of the integral part a, and the soldering process and the material solder 8', the soldering flux 9', the diluent 10 'are applied to the connection points of the circuit parts by welding, so as to complete circuit connection and form the terminal assembly B'.

3. As shown in fig. 4, the terminal assembly B is fitted into the inner seal ring 2', placed in a plastic housing 14' containing the filler material 12 'according to a prescribed angle (the metal bushing 13' is formed into the plastic housing 14 'by injection molding), and is snap-fitted into the sensor assembly C'.

4. As shown in fig. 5, the sensor assembly C ' is fitted with an outer seal ring 15' to become a camshaft position sensor assembly D '.

The main improvement points of the utility model are as follows:

the integral injection molding type camshaft position sensor adopts an integrated configuration design thought, solves the problem of excessive sub-parts, greatly reduces the product cost and is beneficial to market popularization. The parts in the simplified and improved prior art are 10 parts in total, namely an inner sealing ring 2', a C1 capacitor 4', an R1 resistor 5', a C2 capacitor 6', a circuit board 7', soldering tin 8', soldering flux 9', a diluent 10', a filling material 12', a plastic shell 14 and an outer sealing ring 15'.

The present utility model provides a one-piece injection molded camshaft position sensor assembly as described in detail below with reference to the accompanying drawings. Fig. 6 shows the overall installation and assembly process of the camshaft position sensor of the present utility model. As shown in fig. 6, 6 sub-parts of the present utility model are: the Hall element 1, the metal terminal 2, the primary injection molding structural member 3, the secondary injection molding structural member 4, the metal bushing 5 and the outer sealing ring 6 are integrated.

Fig. 9 shows the mounting and assembling process of the circuit integrated part of the present utility model. Fig. 10 illustrates the assembly of the one shot molded part of the present utility model. Fig. 11 illustrates the assembly of the overmolding configuration of the present utility model. Fig. 12 shows the structure of the circuit integrated part of the present utility model. Fig. 13 shows the structure of the one shot molded part of the present utility model. Fig. 14 shows the structure of the over-molded construction of the present utility model. Fig. 15 shows the structure of the finished camshaft position sensor formed from the installed overmold of the present utility model.

As shown in fig. 9-14, the sensor device of the present utility model generally comprises an integrated circuit body, a primary injection molded configuration, and a secondary injection molded configuration.

As shown in fig. 9-11, the assembly steps of the present utility model are as follows:

1. as shown in fig. 9, the resistance welding process is designed to fix the pins of the hall element 1 and the metal terminal 2 into a circuit integrated part a by hot-melt welding, thereby completing the sensor circuit connection

2. As shown in fig. 10, the circuit integrated part a is formed into a one-shot injection molded part B by injection molding, and the one-shot injection molded part B has a function of fixing the electric parts

3. As shown in fig. 11, the primary injection molding member B forms the secondary injection molding member C that integrates the features of the insertion hole, the mounting hole, the seal, and the like, through an injection molding process.

The design of the primary injection molding structural member 3 and the secondary injection molding structural member 4 solves the difficult problem of injection molding by using the conventional plastic thin wall, eliminates the risk of damage to the Hall element 11 'caused by high pressure and high temperature in the injection molding process, saves the sub-parts such as the inner sealing ring 2', the filling material 12', the plastic shell 14' and the like of the conventional design structure, and improves the strength of the whole structure.

Further preferably, the present embodiment includes the hall element 1 and the metal terminal 2 as an integral piece of the circuit, as shown in fig. 9 and 12. The hall element 1 includes an integrated columnar shoe and sensor circuit board. And three connecting pins of the sensor circuit board vertically extend upwards from one side of the columnar bottom support along the direction vertical to the bottom surface of the columnar bottom support to form a three-fork-shaped connecting pin structure.

Fig. 7 shows a prior art sensor circuit diagram. Fig. 8 shows a circuit diagram of an improved sensor of the present utility model. As shown in fig. 7-8, the sensor circuit board is provided with an integrated built-in integrated filter circuit integrated with corresponding resistor, capacitor, and electronic circuits on the internal wafer.

As shown in fig. 7-8, the utility model adopts an integrated circuit design, and a filter circuit-a resistor element R1, capacitor elements C1 and C2 and a circuit are manufactured on a wafer inside the U1 by using a highly integrated Hall element U1 to replace the original Hall element U, so that an external filter circuit is replaced, and the conventional design of C1 capacitor 4', R1 resistor 5', C2 capacitor 6', circuit board and other sub-parts 7' are saved.

The utility model adopts the design of the resistance welding process, replaces the original soldering electric process in the prior art, completes the circuit connector between the metal terminal 2 and the pin of the Hall element 1, and saves the sub-parts of soldering tin 8', soldering flux 9' and diluent 10' of the conventional soldering process.

The tops of three connecting pins of the sensor circuit board are welded connection points 21. The metal terminal 2 is an inverted-L-shaped hook structure, and the bottom of the inverted-L-shaped hook structure is a welding connection point 21. The solder connection points 21 at the top of the connection pins are square pads for quick and correct snap-on positioning of the solder two ends. And, the welding connection point 21 of each hook structure and the welding connection point 21 of each connection pin are mutually welded together, so that the bottom of each metal terminal 2 vertically extends upwards along the extending direction parallel to the corresponding welded connection pin, and a vertical three-fork structure 22 formed by the connection pin and the metal terminal 2 is formed. And, the hook body portions 23 at the top of the vertical three-fork structure 22 are parallel to each other, and the hook body portions 23 have chamfers for smoothly inserting the mating female terminals into place.

Further preferably, as shown in fig. 10 and 13, the circuit integrated part is formed into a one-shot molded part 3 by injection molding, which is an integrated structure of the circuit integrated part and the fixing connection part, and the structure provides the sensor device with a function of fixing the electric parts.

The primary injection molding structural member 3 is a fixed connecting member of an E-shaped structure, the main connecting part of the fixed connecting member is a rectangular hollow upright post 31, the top of the upright post is provided with a strip-shaped through hole which is perforated along the vertical direction, the top of the through hole extends out of the hook body part 23 of the vertical three-fork body structure 22, the rectangular hollow upright post 31 of the main connecting part of the middle fixed connecting member wraps the vertical three-fork body structure 22, the bottom of the rectangular hollow upright post is communicated with a semicircular column type boss base 34, and the base wraps the Hall element 1. The middle part of the rectangular hollow upright column 31 is communicated with a semicircular column type decompression boss 33.

Further preferably, the bottom of the semi-cylindrical boss base 34 is fixed with a strip boss structure 341. The strip boss structure 341 is used for axially fixing the hall element 1, thereby meeting the requirement of the detection distance of the sensor.

It is further preferable in this embodiment that an annular groove 342 is provided along the bottom circumferential direction of the semicircular column-shaped boss base 34, and the annular groove 342 is used for radially positioning the hall element 1 so as to satisfy the sensor output signal phase accuracy.

Further preferably, the rectangular hollow column 31 is a flat column structure, and the upper and middle portions of the back side plane of the flat column structure are provided with through holes (311, 312) penetrating the front side plane.

It is further preferred that the rectangular hollow column 31 has a curved hollow cylinder structure 32 at the top that matches the hook shape of the hook portion 23 of the vertical trifurcate structure 22.

Further preferably, as shown in fig. 11 and 14, the primary injection molding structural member 3 forms the secondary injection molding structural member 4 integrating the features of the insertion hole, the mounting hole, the sealing and the like through an injection molding process, the main body of the structure is a fully covered inverted L-shaped column structure 40, and the structure is an integrated structure of the primary injection molding structural member 3 and the secondary injection molding structural member 4.

The semi-cylindrical decompression boss 33 and the semi-cylindrical boss base 34 of the fixed connection of the E-shaped structure are respectively wrapped by a middle bearing cylinder 41 and a bottom bearing semi-cylinder 42 of the inverted L-shaped cylinder structure 40. A connecting column structure for wrapping the rectangular hollow upright column 31 is communicated between the middle bearing cylinder 41 and the bottom bearing half-column 42, one side of the connecting column structure is provided with a reinforcing rib 43 for improving the connection strength of the sensor body, and the reinforcing rib 43 is communicated with the middle bearing cylinder 41 and the bottom bearing half-column 42. The inverted L-shaped cylinder structure 40 is provided at the top with a cylindrical plug slot 44, which cylindrical plug slot 44 is nested outside the hook body portion 23 of the vertical trifurcate structure 22.

In this embodiment, it is further preferable that a semicircular column type mounting arm 45 is integrally fixed to the middle upper portion of the inverted L-shaped column structure 40 in the lateral extending direction of the opposite side of the cylindrical plug groove 44, and the semicircular column type mounting arm 45 is capable of holding the sensor body so as to be attached to the engine mounting surface.

Further preferably, as shown in fig. 6 and 13, the integrally injection molded camshaft position sensor device of the present utility model further includes a metal bushing 5, wherein a metal bushing 5 is nested above the semi-cylindrical pressure reducing boss 33, the metal bushing 5 is used for reinforcing the bonding strength of the plastic part by two-shot molding, and one, two or more screw mounting round holes 51 are provided on the metal bushing 5, and the screw mounting round holes 51 meet the pressure requirement of mounting screws.

Fig. 15 shows the structure of the finished camshaft position sensor formed by the overmoulded part 4 according to the utility model.

Further preferably, as shown in fig. 6, 11 and 15, the integrally molded camshaft position sensor device of the present utility model further comprises an outer seal ring 6, wherein the outer seal ring 6 is sleeved in a circumferential groove of the middle bearing cylinder 41 of the two-shot molded structure 4.

Compared with the prior art, the camshaft position sensor adopts an integrated configuration structure, reduces 15 sub-parts in the prior art to 6 parts, greatly reduces the product cost, and is beneficial to product production and market popularization.

Compared with the prior art, the utility model has the advantages that the circuit structure, the connecting structure and the plug-in positioning structure of the camshaft position sensor are improved, so that the number of the sub-parts of the product is reduced by 60 percent, and the cost of the sub-parts is reduced by 28 percent. Specifically, the present utility model improves the following aspects:

1. the circuit structure of the utility model is changed from the split structure of the Hall element 1 and the filter circuit in the prior art into the integrated filter circuit structure of the Hall element 1, thereby greatly simplifying the circuit structure of the sensor. The circuit structure of the sensor adopts an integrated circuit design, the high-integration Hall element U1 is used for replacing the original Hall element U, and the filter circuit-resistor element R1, the capacitor elements C1 and C2 and the circuit are manufactured on the internal wafer of the U1, so that the external filter circuit in the prior art is effectively replaced, on one hand, the conventional design of the sub-parts such as the capacitor C1, the resistor R1, the capacitor C2 and the circuit board are saved, and on the other hand, external plug-in connection is not needed, so that the structural strength of the sensor is effectively improved. The metal terminal 2 has a chamfer design at the top and has the function of being smoothly inserted into place with a matched female terminal. The middle part of the metal terminal 2 is straight, which is beneficial to improving the productivity and saving the materials. And the welding end shape bonding pad design of the metal terminal 2 is beneficial to quick and correct lap joint positioning of the two welding ends, and improves the welding efficiency.

2. The fixed connecting piece of the E-shaped structure of the primary injection molding structural piece 3 is perfectly nested outside the circuit structure of the inverted L-shaped hook body structure, so that an integrated connection reinforcing structure of the circuit structure is formed, the E-shaped structure body is subjected to 90-degree cladding injection molding, accurate positioning of a secondary injection molding head of a product is facilitated, the product interface precision is improved, the strength of an injection molding finished product is greatly enhanced, and the injection molding failure rate is effectively reduced. The biconvex platform structure of the E-shaped structure body can adjust injection molding pressure, so that dislocation caused by forced deformation and movement of internal parts is avoided. The strip-shaped boss feature of the boss base can axially fix the Hall element 1, so that the requirement of the detection distance of the sensor can be met. The annular groove 342 of the boss base is beneficial to radially positioning the hall element 1 so as to meet the effect of the phase precision characteristic of the output signal of the sensor. The metal bushing 5 can strengthen the bonding strength of the plastic part of the product so as to meet the pressure requirement of the mounting screw. The flat column structure can meet the requirement of filling and flowing of injection molding materials, and the injection molding qualification rate is greatly improved.

3. The secondary injection molding structural member 4 is an integrated full-coverage structure of the primary injection molding structural member 3 and the secondary injection molding structural member 4, and the main body of the secondary injection molding structural member is an inverted L-shaped cylinder structure 40, and the structure integrates the characteristics of a plug hole, a mounting hole, sealing and the like. This configuration adds an integral cylindrical plug slot 44, semi-cylindrical mounting arms 45 and reinforcing ribs 43. The reinforcing ribs 43 can save plastic and improve the connection strength of the sensor body. The semi-cylindrical mounting arm 45 facilitates the function of holding the sensor body against the engine mounting surface. The cylindrical plug slot 44 facilitates mating with the female slot, thereby ensuring a reliable electrical connection of the sensor to external wiring. The cylindrical profiling feature of the inverted-L cylinder structure 40 uniformly encapsulates the cylindrical hall element 1, providing reliable external protection. The circumferential direction of the cylinder in the middle of the inverted-L cylinder structure 40 is provided with an annular groove 342, which can be tightly attached to and fixed with an annular sealing ring. The annular groove 342 and annular seal ring configuration facilitates filling the sensor and engine mounting hole gap.

The utility model has the innovative improvement point that the camshaft position sensor adopts an integrated configuration structure, and the camshaft position sensor is manufactured by using the least number of parts, thereby greatly reducing the cost of products and being beneficial to the production and market popularization of the products.

The above description has been given of the embodiment of the integrally injection molded camshaft position sensor device of the present utility model, and the purpose of this utility model is to explain the spirit of the present utility model. Note that modifications and combinations of the features of the above-described embodiments can be made by those skilled in the art without departing from the spirit of the present utility model, and therefore, the present utility model is not limited to the above-described embodiments. The specific features, such as shape, size and position, of the integrally molded camshaft position sensor assembly of the present utility model may be specifically designed with the effects of the features disclosed above, all of which are within the ability of those skilled in the art. Moreover, each feature disclosed above is not limited to the combination of the features disclosed with other features, and other combinations of features may be made by those skilled in the art in accordance with the purpose of the present utility model, so as to achieve the purpose of the present utility model.

Claims (10)

1. The integral injection molding type camshaft position sensor device is characterized by comprising a circuit integrated piece, wherein the circuit integrated piece comprises a Hall element and a metal terminal; wherein, the liquid crystal display device comprises a liquid crystal display device,

the Hall element comprises an integrated columnar collet and a sensor circuit board; and, in addition, the processing unit,

three connecting pins of the sensor circuit board vertically extend upwards from one side of the columnar bottom support along the direction perpendicular to the bottom surface of the columnar bottom support to form a three-fork-shaped connecting pin structure; the sensor circuit board is provided with an integrated built-in filter circuit integrated with corresponding resistor, capacitor and electronic circuit on the internal wafer;

the top of the connecting pin is a welding connection point; the metal terminal is of an inverted L-shaped hook structure, and the bottom of the inverted L-shaped hook structure is a welding connection point; the welding connection point at the top of the connecting pin is a square welding pad which is used for welding two ends to be quickly and correctly lapped and positioned; and, in addition, the processing unit,

the welding connection point of each hook body structure and the welding connection point of each connecting pin are mutually welded together, so that the bottom of each metal terminal vertically extends upwards along the extending direction parallel to the corresponding welded connecting pin to form a vertical three-fork structure formed by the connecting pin and the metal terminal; and, the hook body parts at the top of the vertical three fork body structure are parallel to each other, and the hook body parts are provided with chamfers for smoothly inserting the matched female terminals into place.

2. The integrally molded camshaft position sensor assembly of claim 1, wherein the circuit integrated part is formed into a one-shot molded part by injection molding, the molded part being an integrated structure of the circuit integrated part and the fixed connection part, the structure providing the sensor assembly with a function of fixing electrical parts; the primary injection molding structural piece is a fixed connecting piece of an E-shaped structure, the main connecting part of the fixed connecting piece is a rectangular hollow upright post, the top of the upright post is provided with a strip-shaped through hole which is perforated along the vertical direction, the top of the through hole extends out of a hook body part of a vertical three-fork body structure, the rectangular hollow upright post of the main connecting part of the middle fixed connecting piece wraps the vertical three-fork body structure, the bottom of the main connecting part is communicated with a semicircular boss base, and the base wraps the Hall element; the middle part of the rectangular hollow upright post is communicated with a semicircular column type decompression boss.

3. The integrally molded camshaft position sensor assembly of claim 2, wherein a bar-shaped boss structure is fixed to the bottom of the semi-cylindrical boss base; the strip boss structure is used for axially fixing the Hall element, so that the requirement of the detection distance of the sensor is met.

4. A one-piece injection molded camshaft position sensor assembly as claimed in claim 2, wherein,

an annular groove is formed in the circumferential direction of the bottom of the semicircular column boss base and is used for radially positioning the Hall element, so that the phase precision of the output signal of the sensor is met.

5. The integrally molded camshaft position sensor assembly of claim 2, wherein the rectangular hollow pillar is a flat pillar structure, and the upper and middle portions of the back side plane of the flat pillar structure are provided with through holes penetrating the front side plane.

6. A one-piece injection molded camshaft position sensor assembly as claimed in claim 2, wherein the rectangular hollow post top has a curved hollow cylinder structure matching the hook shape of the hook portion of the vertical trifurcate structure.

7. The integrally molded camshaft position sensor assembly of any one of claims 2-6, wherein the primary injection molded part is formed into a secondary injection molded part integrating the features of the insertion hole, the mounting hole, the seal, etc. by an injection molding process, the main body of the configuration is a fully covered inverted L-shaped cylinder structure, and the configuration is an integrated structure of the primary injection molded part and the secondary injection molded part;

the semi-cylindrical decompression boss and the semi-cylindrical boss base of the fixed connecting piece of the E-shaped structure are respectively wrapped by a middle bearing cylinder and a bottom bearing semi-cylinder of the inverted L-shaped cylinder structure; a connecting column structure for wrapping the rectangular hollow upright column is communicated between the middle bearing cylinder and the bottom bearing half-column, one side of the connecting column structure is provided with a reinforcing rib for improving the connection strength of the sensor body, and the reinforcing rib is communicated with the middle bearing cylinder and the bottom bearing half-column; the top of this inverted L cylinder structure is provided with cylindric plug groove, and this cylindric plug groove nests in the hook body part outside of vertical trident body structure.

8. A one-piece injection molded camshaft position sensor assembly as claimed in claim 7, wherein,

the middle upper part of this inverted L type cylinder structure, the lateral direction extension direction integration of cylindric plug groove contralateral side is fixed with the semicircle pillar-shaped installation arm, and this semicircle pillar-shaped installation arm can centre gripping sensor body makes it laminating engine mounting face.

9. The integrally molded camshaft position sensor assembly of claim 7, further comprising a metal bushing, wherein the metal bushing is nested above the semi-cylindrical pressure relief boss, the metal bushing is used for secondarily molding and reinforcing the bonding strength of the plastic part, and a screw mounting round hole is formed in the metal bushing, and meets the pressure requirement of mounting screws.

10. The integrally molded camshaft position sensor assembly of claim 7, further comprising an outer seal ring, wherein the outer seal ring is nested within a circumferential groove of the central bearing cylinder of the overmold.