阅读说明：本技术 制造温度测量装置的方法、中间组件和温度测量装置 (Method for producing a temperature measuring device, intermediate assembly and temperature measuring device ) 是由 M·姆巴伊 T·古林 E·费兰德 J·斯蒂克伯格 J·拉特 于 2021-03-19 设计创作，主要内容包括：本发明涉及制造温度测量装置的方法、中间组件和温度测量装置。用于温度测量装置的中间组件包括：温度传感器,所述温度传感器包括测量单元和两个金属分支；两个电连接引脚,每个电连接引脚具有附接部分和连接部分,两个所述金属分支分别在它们的附接部分处电链接到两个所述电连接引脚；所述两个引脚的所述附接部分在主平面中延伸并且所述测量单元的端部相对于所述电连接引脚的参考点占据预定位置；塑料壳体,所述塑料壳体由在所述主平面的任一侧抵靠所述电连接引脚定位的至少两个插入件形成,所述壳体限定夹具以沿着垂直于所述主平面的至少一个横向轴线保持所述测量单元。(The invention relates to a method for producing a temperature measuring device, an intermediate assembly and a temperature measuring device. An intermediate assembly for a temperature measuring device comprising: a temperature sensor comprising a measurement unit and two metal branches; two electrical connection pins, each having an attachment portion and a connection portion, the two metal branches being electrically linked to the two electrical connection pins at their attachment portions, respectively; the attachment portions of the two pins extend in a main plane and the ends of the measurement unit occupy a predetermined position with respect to a reference point of the electrical connection pin; a plastic housing formed of at least two inserts positioned against the electrical connection pins on either side of the major plane, the housing defining a clamp to hold the measurement unit along at least one transverse axis perpendicular to the major plane.)

1. A method of manufacturing a temperature measurement device, the method comprising the steps of:

a) providing a temperature sensor comprising a measurement unit and two metal branches, the measurement unit having a first free end and a second end fixed to the metal branches,

b) providing two electrical connection pins, each electrical connection pin having an attachment portion and a connection portion,

c) forming electrical connections between one of the metal branches and one of the electrical connection pins and between another of the metal branches and another of the electrical connection pins at their attachment portions, the attachment portions of the two electrical connection pins extending in a main plane;

the method is characterized in that:

-in step c), the electrical connection is made when the first free end of the measurement unit occupies a predetermined position with respect to a reference point of the electrical connection pin,

-said method comprises, after said step c), the steps of:

d) assembling a plastic housing formed by at least two inserts positioned against the electrical connection pins on both sides of the main plane so as to form an intermediate assembly for the temperature measurement device, the housing defining a clamp to hold the measurement unit along at least one transverse axis perpendicular to the main plane.

2. The method of manufacturing a temperature measurement device of claim 1, wherein the clamp of the housing is formed by two flexible arms bearing on two areas of the periphery of the measurement cell.

3. A method of manufacturing a temperature measurement device according to claim 1 or 2, wherein the two inserts are secured to each other by a hinge.

4. The method of manufacturing a temperature measurement device according to claim 1 or 2, further comprising the steps of:

e) overmolding the intermediate component positioned in a mold by injecting a thermoplastic material to form the temperature measurement device.

5. The method of manufacturing a temperature measurement device of claim 4, wherein step e) comprises: -wedging the intermediate component in the mould by means of at least two retaining elements cooperating with at least two recessed areas provided in the housing before injecting the thermoplastic material.

6. The method of manufacturing a temperature measurement device of claim 5, wherein each electrical connection pin forms an elbow outside the mold having an angle between 91 ° and 95 ° inclusive, and wherein at least one retaining element bears on the housing so as to bend the intermediate assembly and form an elbow in the mold having an angle of 90 °.

7. An intermediate assembly for a temperature measurement device, the intermediate assembly comprising:

a temperature sensor comprising two metal branches and a measuring unit having a first free end and a second end fixed to the metal branches,

-two electrical connection pins, each electrical connection pin having an attachment portion and a connection portion, the metal branches both being electrically linked at their attachment portions to both of the electrical connection pins, respectively; the attachment portions of the two electrical connection pins extend in a main plane;

said intermediate assembly being characterized in that said first free end of said measuring unit occupies a predetermined position with respect to a reference point of said electrical connection pins,

and, the intermediate assembly comprises a plastic housing formed by at least two inserts positioned against the electrical connection pins on both sides of the main plane, the housing defining a clamp to hold the measurement unit along at least one transverse axis perpendicular to the main plane.

8. Intermediate assembly according to claim 7, wherein the clamp of the housing is formed by two flexible arms bearing on two areas of the periphery of the measuring unit.

9. The intermediate assembly of claim 8, each flexible arm being capable of accommodating a deformation of less than or equal to 0.7mm along the transverse axis.

10. The intermediate assembly of any of claims 7 to 9, comprising at least two recessed regions arranged in the housing so as to cooperate with at least two retaining elements during overmolding of the intermediate assembly.

11. Intermediate assembly according to any one of claims 7 to 9, wherein each insert of the casing comprises at least one fastening system to allow assembly of the casing.

12. The intermediate assembly of any of claims 7 to 9, wherein the two inserts are secured to each other by a hinge.

13. The intermediate assembly of claim 11, wherein the fastening system comprises: a centering pin on one of the inserts and a slot on the other insert, the centering pin mating with the slot; and a male element of a clip on one of the inserts and a female element of the clip on the other of the inserts, the male element cooperating with the female element.

14. The intermediate assembly of any of claims 7 to 9, wherein the housing comprises an upper insert and a lower insert, the upper insert positioned on an outer surface of the attachment portion of the electrical connection pin, the lower insert positioned on an inner surface of the attachment portion.

15. A temperature measuring device obtained by overmolding an intermediate assembly according to any one of claims 7 to 14.

16. The temperature measurement device of claim 15, wherein the measuring head surrounding the measuring unit has a thickness of thermoplastic material less than or equal to 0.5mm, or even less than or equal to 0.3 mm.

Technical Field

The present invention relates to the field of fittings and connectors allowing fluid communication between pipes or tubes, in particular for motor vehicles. The invention relates in particular to a method of manufacturing a temperature measuring device adapted to be attached to a fluid connection fitting. The invention also relates to an intermediate assembly for manufacturing said device.

Background

In the field of fluid connectors for automobiles, it is often beneficial to have a quick-connect fitting that allows easy integration of a sensor that has good characteristics of robustness, sensitivity, and measurement reactivity and has minimal impact on the flow of fluid intended to pass through the fitting.

Document CN205877527 discloses a quick connector comprising a sensor held in a connectable support; the sensor is positioned laterally with respect to the flow of the fluid and a sensing head of the sensor is in direct contact with the fluid. The main drawbacks of this type of connector are the risk of corrosion of the sensitive head of the sensor and its metallic electrical connection lugs, in particular the risk of short circuits when the fluid is an electrical conductor, and finally the risk of leaks between the connectable support and the sensor.

Other quick connector solutions propose covering or overmolding the sensitive head with a polymer or resin, which eliminates the aforementioned risks of corrosion and short circuits. The over-molding of the sensor/connection pin assembly in the form of a connectable end piece also greatly limits the risk of fluid leakage. Such solutions are described in particular in documents EP2339306, US2016/305825 and CN 209084259U.

In order to obtain an accurate and fast detection of the temperature of the fluid, it is advantageous that the polymer or resin material placed on the sensitive head exhibits good thermal conductivity and/or that its thickness is small and very well controlled.

Document FR2699673 proposes a solution based on an insert for holding a temperature sensor. The sensor comprises a sensitive pad, the first end of which is free and the second end of which is connected to an electrical connection branch. The insert defines a cradle structure in which the second end of the sensitive insert is wedged. The carrier structure allows precision in the thickness of the thermoplastic material overmolded onto the liner to be achieved by mechanically retaining the liner during the overmolding operation. However, considering the dimensional tolerances of sensitive gaskets, which can be up to a few tenths of a millimeter, wedging the second end of the gasket in the bracket does not guarantee a low and well controlled thickness of the overmoulding on the first end of the gasket.

Disclosure of Invention

The present invention provides an alternative solution to the prior art solutions, which seeks to remedy all or part of the aforementioned drawbacks. The invention particularly relates to a method of manufacturing an integrated, robust, sensitive and reactive temperature measurement device suitable for attachment to a fluid connection fitting. The invention also relates to an intermediate assembly for overmoulding in a thermoplastic material to form the temperature measuring device.

The invention relates to a method for producing a temperature measuring device, comprising the following steps:

a) providing a temperature sensor comprising a measurement unit and two metal branches, the measurement unit having a first free end and a second end fixed to the metal branches,

b) providing two electrical connection pins, each electrical connection pin having an attachment portion and a connection portion,

c) forming electrical connections between one of the metal branches and one of the electrical connection pins and between another of the metal branches and another of the electrical connection pins at their attachment portions, the attachment portions of the two pins extending in a main plane; the electrical connection is made when the first free end of the measuring cell occupies a predetermined position with respect to a reference point of the electrical connection pin, and then,

d) assembling a plastic housing formed by at least two inserts positioned against the electrical connection pins on both sides of the main plane so as to form an intermediate assembly for the temperature measurement device, the housing defining a clamp to hold the measurement unit along at least one transverse axis perpendicular to the main plane.

According to other advantageous and non-limiting features of the invention, alone or in any technically feasible combination:

-forming said electrical connection when said first end of said measuring unit occupies a predetermined position with respect to said reference point along a longitudinal axis comprised in said main plane;

-the clamp of the housing is formed by two flexible arms bearing on two areas of the periphery of the measuring unit;

-the two regions bearing the flexible arms are symmetrical with respect to the longitudinal symmetry axis of the unit;

-the two inserts are fixed to each other by means of a hinge;

-each electrical connection pin forms an elbow, the attachment portion of which forms an angle with the connection portion thereof;

-the reference point of the electrical connection pin is formed by the elbow;

-the manufacturing method comprises a step e) comprising overmoulding the intermediate component positioned in a mould by injecting a thermoplastic material so as to form the temperature measurement device;

-step e) comprises: wedging the intermediate component in the mould by means of at least two retaining elements cooperating with at least two recessed areas provided in the casing, before injecting the thermoplastic material;

-each electrical connection pin forms an elbow outside the mould having an angle between 91 ° and 95 ° inclusive, and wherein at least one retaining element bears on the housing so as to bend the intermediate assembly and form an elbow in the mould having an angle of 90 °;

-said intermediate component has a shape defined as an overmoulding of a thermoplastic material of uniform thickness on said component during step e).

The invention relates to an intermediate assembly for a temperature measuring device, comprising:

a temperature sensor comprising two metal branches and a measuring unit having a first free end and a second end fixed to the metal branches,

-two electrical connection pins, each having an attachment portion and a connection portion, the metal branches being electrically linked at their attachment portions to both of the electrical connection pins, respectively; the attachment portions of the two electrical connection pins extend in a main plane and the first free end of the measurement unit occupies a predetermined position with respect to a reference point of the electrical connection pins,

-a plastic housing formed by at least two inserts positioned against the electrical connection pins on both sides of the main plane, the housing defining a clamp to hold the measurement unit along at least one transverse axis perpendicular to the main plane.

According to other advantageous and non-limiting features of the invention, alone or in any technically feasible combination:

-the first end of the measuring unit occupies a predetermined position with respect to the reference point along a longitudinal axis comprised in the main plane;

-the housing has, at least in a region extending from the measurement unit to the attachment portion, a substantially symmetrical shape with respect to a longitudinal axis comprised in the main plane;

-the clamp of the housing is formed by two flexible arms bearing on two areas of the periphery of the measuring unit;

-the two regions bearing the flexible arms are symmetrical with respect to the longitudinal symmetry axis of the unit;

-each flexible arm is able to accommodate deformations of less than or equal to 0.7mm along the transverse axis;

-each electrical connection pin forms an elbow, the attachment portion of which forms an angle with the connection portion thereof, and the connection portion defines a secondary plane;

-the intermediate component comprises at least two recessed areas arranged in the housing so as to cooperate with at least two retaining elements during overmoulding of the intermediate component;

-each insert of the casing comprises at least one fastening system to allow assembly of the casing;

-the two inserts are fixed to each other by means of a hinge;

-the fastening system comprises: a centering pin on one of the inserts and a slot on the other insert, the centering pin mating with the slot; and a male element of a clip on one of the inserts and a female element of the clip on the other of the inserts, the male element cooperating with the female element;

-the clip is placed as close as possible to the clamp of the housing;

-the housing comprises an upper insert positioned on an outer surface of the attachment portion of the electrical connection pin and a lower insert positioned on an inner surface of the attachment portion.

The invention finally relates to a temperature measuring device obtained by overmoulding the above-mentioned intermediate assembly.

The temperature measuring device comprises a measuring head surrounding the measuring unit, the measuring head having a thickness of thermoplastic material less than or equal to 0.5mm, or even less than or equal to 0.3 mm.

Drawings

Further features and advantages of the invention will become apparent from the following detailed description of the invention, with reference to the accompanying drawings, in which:

FIGS. 1a and 1b show a separate temperature measuring device mounted on a fluid connection fitting;

fig. 2a to 2e show steps in a method of manufacturing a temperature measuring device according to the invention;

fig. 3 shows a partial view of an intermediate assembly for a temperature measuring device according to the invention.

Detailed Description

The present invention relates to a method of manufacturing a temperature measurement device 100, an example of which is shown in fig. 1 a.

Such a temperature measuring device 100 is particularly suitable for being connected to a fluid connection fitting 150, allowing two pipes to be placed in communication, these pipes and the fluid connection fitting 150 being intended to be crossed by a fluid, such as fuel or coolant, for example in an engine of a motor vehicle.

As can be seen in the example of fig. 1b, the fluid connection fitting 150 may comprise a first end piece 120 intended to be connected to a first fluid conduit and a second end piece 130 intended to be connected to a second fluid conduit. Of course, the shape and connection configuration of the fitting 150 is not fixed and may be different from those shown in fig. 1 b.

Here, the first end piece 120 has a tubular shape and is provided with a quick female connector. The term "quick connector" is understood to mean a connector that does not require a special tool to make a connection between two elements: thus, quick connectors are typically based on a clamping or snap-fit mechanism. The second end piece 130 also has a tubular shape and is provided with, for example, a male connector.

The fluid coupling fitting 150 further includes a coupling member 110 that places the first end piece 120 and the second end piece 130 in communication. The coupling element 30 defines an inner tubular space in which fluid will circulate from the inner tubular space of the first end piece 120 to the inner tubular space of the second end piece 130. The coupling member 110 comprises an aperture at which the temperature measuring device 100 is fixed gas-tightly, for example by clamping or snap fastening or by laser welding.

The temperature measuring device 100 has a measuring head 101 (fig. 1a) which opens into the inner tubular space of the coupling member 110 and is in contact with the fluid, the temperature of which can be measured. At its other end 102, the temperature measurement device 100 allows access to electrical connection pins in order to connect the device to an external controller.

Note that temperature measurement device 100 may have a shape other than the right angle shape shown in fig. 1a, depending on installation and/or dimensional constraints.

The present invention therefore relates to a method of manufacturing such a temperature measurement device 100.

The method comprises a first step a): a temperature sensor 10 is provided comprising a measuring unit 11 and two metal branches 12, as shown in fig. 2 a. The temperature sensor 10 may in particular be formed by an NTC thermistor ("negative temperature coefficient") whose resistance decreases uniformly when the temperature increases and vice versa.

The measuring unit 11 has a first free end 11a and a second end 11b fixed to the metal branch 12. In the temperature measuring device 100 to be obtained at the end of the manufacturing method according to the invention, the measuring unit 11 (or a sensitive unit capable of measuring temperature) is placed in the measuring head 101.

The manufacturing method next comprises step b): two electrical connection pins 20 are provided, each having an attachment portion 21 and a connection portion 22 (fig. 2 b).

At the end of the manufacturing method of the device 100, the connection portion 22 is intended to extend towards the second end 102 of the temperature measurement device 100 for connection to an external controller.

The attachment portion 21 defines a main plane (x, z) and extends along a longitudinal axis z. Advantageously, they each have an electrical connection area 23 defined to facilitate the next step of connecting the metal branch 12 of the temperature sensor 10 to said portion 21.

Each electrical connection pin 20 may be planar or form an elbow as shown by way of example in fig. 2 b. In the latter case, the attachment portion 21 forms an angle with the connection portion 22. According to a particular embodiment, the elbow has an angle close to 90 °.

The connection portions 22 of the two electrical connection pins 20 define a secondary plane forming an angle greater than or equal to 0 ° with the primary plane (x, z). In the example of fig. 2b, the secondary plane corresponds to the plane (x, y), thus forming an angle of 90 ° with the primary plane (x, z).

The manufacturing method comprises a third step c) comprising the formation of an electrical connection of each metal branch 12 on each electrical connection pin 20, respectively, at the attachment portion 21 (fig. 2 c).

The formation of the electrical connection may, for example, comprise soldering between the metal branch 12 and the electrical connection pin 20. The welding of the metal branch 12 is performed on the welding area 23 of the attachment portion 21. Since at this stage there are no other parts than the metal parts to be welded, the quality of the weld is very good and is not contaminated by the potential deterioration of the plastic parts joined together, as is the case in the solutions of the prior art.

Alternatively, the electrical connection may be established by applying a bearing force to hold the branch 12 and the pin 20 in contact. Such a bearing force can be maintained, for example, in the next step d) of the method.

In all cases, an electrical connection is made when the first end 11a of the measuring cell 11 occupies a predetermined position P with respect to the reference point 26 of the electrical connection pin 20.

In the example of fig. 2c, the reference point 26 is realized by an elbow formed between the attachment portion 21 and the connection portion 22. The reference point 26 may alternatively be formed by a mark, shoulder and/or notch disposed on the pin 20. Still in the example of fig. 2c, the first end 11a occupies a predetermined position P along the longitudinal axis z with respect to the reference point 26. Alternatively, the predetermined position may be defined according to one or more other directions (3D).

Thus, step c) of the method advantageously comprises: a step of accurately positioning the temperature sensor 10 relative to the reference point 26 of the pin 20 before establishing the electrical connection. In particular, the positioning is controlled to +/-0.1mm, or even +/-0.05 mm. We will see below how this precise and controlled positioning of the first end 11a of the measuring cell 11 with respect to the pins 20 allows to obtain a low and controlled thickness of material on the cell 11, thus forming the measuring head 101 of the temperature measuring device 100.

By convention, we will refer to the outer surface 20a of the pin 20 as the surface with which the branch 12 of the sensor 10 is in contact, as can be seen in fig. 2 c; the outer surface 20a is applied to the attachment portion 21 and the connection portion 22 of the pin 20. We will refer to the inner surface 20b, i.e. the opposite surface of the pin 20, which is also applied to the attachment portion 21 and the connection portion 22.

Then, the manufacturing method comprises step d): the plastic housing 30 is assembled on the electrical connection pins 20 so as to form an intermediate assembly 50 for the temperature measurement device 100 (fig. 2 d). This assembly results in the housing 30 being fixed to the pin 20 (already in contact with the metal branch 12 of the sensor 10).

In the particular case where the metal branch 12 is only held in contact with the pin 20 (e.g. not welded), the assembly of the housing 30 provides a means of fixing and holding the metal branch 12 against the pin 20 by means of a support (bearing). In other words, the housing 30 sandwiches the branch 12 and the pin 20 so as to firmly contact each other.

The housing 30 is formed by at least two inserts, a so-called upper insert 31 and a so-called lower insert 32, which are positioned against the pins 20 on either side of the main plane (x, z). Upper insert 31 is positioned at least on outer surface 20a of attachment portion 21 of each pin 20, and lower insert 32 is positioned at least on inner surface 20b of attachment portion 21 of each pin 20.

According to a first variant, the two inserts 31, 32 are provided separately before assembling the housing 30 onto the pin 20. According to a second variant, the two inserts 31, 32 are fixed to each other by means of a hinge, for example formed by a plastic tongue. The two inserts 31, 32, although linked, can be easily positioned on either side of the pin 20 due to the hinging of the hinges.

The housing 30 defines a clamp 31a, 32a for holding the measuring unit 11 at least along a transversal axis y perpendicular to the main plane (x, z). In other words, the clamp prevents (or greatly limits) the translation of the measuring unit 11 along the transversal axis y. The clamps 31a, 32a may optionally have a larger cover shape than the cover shape shown in fig. 2 d: in this case, the measuring unit 11 can be stabilized along other axes contained in a plane (x, y) perpendicular to the longitudinal axis z.

Advantageously, the clamp is formed by two flexible arms 31a, 32a, which bear on two areas of the periphery of the measuring cell 11. These two regions may be symmetrical with respect to the longitudinal symmetry axis Z of the measuring unit 11, as shown in fig. 2d and 3. Each flexible arm 31a, 32a is preferably able to accommodate deformations along the transverse axis y of up to 0.7mm, in other words each of them is able to deform so as to increase the distance separating them along the transverse axis y by a value less than or equal to 0.7mm, with respect to a rest position in which the two arms 31a, 32a will face each other without deforming.

This flexibility makes it possible to adapt to differences in the shape or diameter of the measuring cell 11. In practice, the measuring cells are usually specified to have a maximum diameter, for example 2.5mm, but their diameter actually varies between 1.8mm and 2.5 mm. Thus, the flexible arms 31a, 32a of the clamp make it possible to keep the measuring unit 11 stable, at least along the transverse axis y, or even to re-centre it in the main plane (x, z), by adapting to tolerance problems on its diameter and without imposing excessive stresses to it that could damage the sensor 10.

The assembly of the two inserts 31, 32 can be carried out in various ways.

According to one embodiment, the two inserts may be glued or welded to each other to form the shell 30 of the intermediate assembly 50.

According to another embodiment, each insert 31, 32 comprises at least one fastening system 40 to allow assembling the casing 30. The fastening system may be based in particular on a clip. For example, the fastening system 40 may include a centering pin on one of the inserts that mates with a slot on the other insert. It may also include a male element of the clip on one of the inserts that mates with a female element of the clip on the other insert.

Advantageously, the clips are placed as close as possible to the clamps 31a, 32a of the housing 30, so that the assembled housing 30 is as rigid as possible in the vicinity of the measuring unit 11, and only the flexibility of the arms 31a, 32a accommodates the dimensional tolerances of the unit 11.

Lower insert 32 may include an elbow portion 32b, which is suitable for use where pin 20 has an elbow. Openings are then provided in lower insert 32 to engage connection portions 22 of pins 20. Advantageously, the connecting portion 22 comprises a wedge suitable for positioning and retaining the lower insert 32. These wedges may be carried by the connecting portion 22 or the insert 32.

In the intermediate assembly 50, the housing 30 preferably has a substantially symmetrical shape with respect to the longitudinal axis z, at least in the region extending from the measurement unit 11 to the attachment portion 21 (fig. 2 d). Since it is symmetrical, this overall shape has the advantage of facilitating the subsequent steps of overmoulding the intermediate assembly 50 and of making it easier and more reliable in order to form the temperature measurement device 100.

Advantageously, the intermediate component 50 also has a shape defined to overmould a uniform and substantially constant thickness of thermoplastic material on said component 50 during a subsequent overmoulding step. The defined shape is substantially imparted by the shape of the housing 30. The formation of a thermoplastic material of uniform thickness simplifies the overmolding step and makes it more reliable and improves the quality of the resulting device 100.

As mentioned above, the manufacturing method according to the invention may then carry out a step e) comprising overmoulding the intermediate component 50 positioned in the mould by injecting a thermoplastic material so as to form the temperature measurement device 100 (fig. 2 e).

The intermediate assembly 50 is mechanically retained in the mould, in particular it is fixed by at least two retaining elements cooperating with the shell 30. The fact that the measuring unit 11 is accurately positioned (predetermined position P) with respect to the pin 20 and therefore with respect to the housing 30 fixed to the pin 20 results in an accurate and controllable positioning of the measuring unit 11 in the mould. Thus, a thermoplastic material of very well controlled thickness can be overmoulded on the measuring cell 11. Any thickness can be reached, but in particular a thickness of less than or equal to 0.5mm, or even less than or equal to 0.3mm, can be achieved, with good uniformity on the free surface of the unit 11 (i.e. outside the region of the periphery of the unit 11 where the clamps 31a, 32a are supported), and in particular at the first end 11 a. The uniformity of the thickness over the measuring cell 11 may be better than +/-0.1 mm.

The thin and very well controlled thickness of the plastic material at the measuring head 101 of the temperature measuring device 100 gives the device 100 very good performance, such as reactivity and measurement accuracy, in addition to the associated robustness in overmolding the sensor 10.

As mentioned above, step e) comprises: the intermediate component 50 is wedged into the mold prior to injection of the thermoplastic material. Advantageously, at least two retaining elements allowing such wedging cooperate with at least two recessed areas 51, 52, 53 arranged in the housing 30.

When pin 20 has an elbow at a 90 ° angle (to form temperature measurement device 100 according to the configuration shown in fig. 1), a deviation of approximately 90 ° +/-2 ° is typically measured, which is related to the bending uncertainty of pin 20. Such deviations in the angle of the elbow are also observable on the intermediate assembly 50. Now, when targeting very low overmold thicknesses on the measurement unit 11, this order of magnitude of angular defects can significantly reduce the precision and uniformity of the overmold thickness.

Thus, according to a particular embodiment, the electrical connection pin 20 provided in step b) forms an elbow with an angle comprised between 91 ° and 95 °, inclusive, that is to say a target of 93 ° +/-2 °. During step e), at least one retaining element is supported on the casing 30 so as to bend the intermediate assembly 50 and form an elbow having an angle of 90 °.

Of course, the invention is not limited to the embodiments and examples that have been described, and alternative embodiments may be added thereto without departing from the scope of the invention as defined by the claims.