CN1123065A - Connector equipped with filter - Google Patents

Abstract

An electrical connector with a filter, comprising a shield frame, a filter unit with a hole, a contact element inserted into the hole, and a leaf spring clamped between the shield frame and the filter unit; the filter unit has a filter function corresponding to the hole Components and grounding electrodes; grounding electrodes and shielding frames are electrically connected through leaf springs; filter units and shielding frames are kept mechanically fixed through leaf springs. In addition, an electrical connector with a filter includes a shielding frame, a filter unit with a hole, a contact element with a stopper inserted through the hole, a clamp for inserting the contact element, clamped between the shielding frame and the The leaf spring and the shell between the filter units; the filter unit has filter function parts and ground electrodes with corresponding holes; the ground electrode and the shielding frame are electrically connected through the leaf spring; the filter unit and the shielding frame are kept mechanically fixed by the leaf spring; contact The element is pressed against the filter unit with a clamp by means of a stop.

Description

Electrical Connector with Filter

technical field

The present invention relates to electrical connectors with filters.

Background technique

In recent years, with the improvement of functions and high-speed processing of electronic devices, it is increasingly required to suppress attenuation of accompanying interference signals and noise signals. For this reason, various electric connector schemes with filters have been proposed (Japanese Unexamined No. 59-184478, Unexamined No. 59-184479, Unexamined No. 62-180973, Unexamined No. 63-239900 Bulletin).

Conventional proposals have proposed a structure in which the shield frame and the filter unit are electrically connected by soldering and mechanical properties are maintained.

In the above structure, the shielding frame and the filter unit maintain electrical connection and mechanical performance through soldering. Firstly, the cost required for such soldering is relatively high. Secondly, due to the heat generated during soldering, cracks often occur in the filter unit. In addition, silver electrode corrosion may also occur due to soldering. Furthermore, the residue of the flux used for soldering adversely affects the components constituting the electrical connector with filter over time. Also, in the place where soldering is performed, due to the formation of a rigid structure, the resistance to expansion and contraction caused by temperature cycle changes is weak.

disclosure of invention

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an electrical connector with a filter that overcomes the various problems described above.

The present invention achieves the above object by providing an electrical connector with a filter having the following structure (hereinafter referred to as "the first invention").

The electrical connector with a filter includes a shield frame, a filter unit with a hole, a contact element inserted through the hole, and a leaf spring sandwiched between the shield frame and the filter unit;

The above-mentioned filter unit has a filter function part and a ground electrode corresponding to the above-mentioned holes;

The above-mentioned ground electrode and the above-mentioned shielding frame are electrically connected through the above-mentioned leaf spring;

The above-mentioned filter unit and the above-mentioned shield frame are held by the above-mentioned leaf spring, and are mechanically fixed.

In addition, the present invention achieves the above object by providing an electrical connector with a filter having the following structure (hereinafter referred to as "second invention").

The electrical connector with a filter includes a shielding frame, a filter unit having a hole, a contact element inserted through the hole and having a stopper, a clamp embedded in the contact element, clamped on the shielding frame and the filter unit. Leaf springs and housings between units;

The filter unit has a filter function element and a ground electrode corresponding to the hole;

The above-mentioned ground electrode and the above-mentioned shielding frame are electrically connected through the above-mentioned leaf spring;

The filter unit and the shield frame are mechanically fixed by the leaf spring;

The above-mentioned contact element is pressed against the above-mentioned filter unit by the above-mentioned clamp through the above-mentioned stopper.

In the following description, when referring to "the present invention", both the above-mentioned first invention and the above-mentioned second invention are included.

The electrical connector with a filter of the present invention can be satisfactorily used in noise-limited electronic devices and electronic equipment, etc., for example, can be satisfactorily used in communication equipment, automotive electronic devices, computer peripheral equipment, and automatic vending machines. , automatic ticket vending machines, and electronic game devices such as pinball machines and entertainment machines.

A brief description of the drawings

1 is an exploded perspective view showing a preferred state of an electrical connector with a filter of the first invention;

Fig. 2 is a sectional view along J-J ' line among Fig. 1;

Fig. 3 is a sectional view showing another state of the filter unit;

4 is a perspective view showing a preferred state of an electrical connector with a filter of the second invention;

Figure 5 is an exploded perspective view of the electrical connector with filter in Figure 4;

Fig. 6 is an exploded perspective view of another preferred state of the electric connector with a filter of the second invention;

Fig. 7 is a sectional view along K-K ' line among Fig. 6; And

8(A)-(C) are perspective views showing various states of the contact member with the stopper.

Best way to implement the invention

Hereinafter, the electric connector with filter of the first invention will be described in detail with reference to the drawings showing preferred states.

Fig. 1 is an exploded perspective view showing a preferred state of an electrical connector with a filter of the first invention, Fig. 2 is a sectional view along line J-J' in Fig. 1 , and Fig. 3 is a sectional view showing other states of the filter unit .

As shown in Fig. 1 and Fig. 2, the electrical connector with filter of the first invention comprises a shielding frame 32, a filter unit 20 having a hole 21, a contact element 33 inserted into the hole 21 and clamped on the shielding frame 32. And the leaf spring 31 between the filter unit 20 . The above-mentioned shield frame 32, the above-mentioned leaf spring 31, and the above-mentioned filter unit 20 are fixed with stopper pins. In addition, in addition to these components, the housing 34 can also be fixed together with these components as required, preferably so that the above-mentioned filter unit can be accommodated. The leaf spring 31 has a shape in contact with the ground electrode 14 formed on the filter unit 20 and the shield frame 32 so that the ground electrode 14 is electrically connected to the shield frame 32 . Furthermore, the above-mentioned leaf spring 31 mechanically holds and fixes the above-mentioned filter unit 20 and the above-mentioned shield frame 32 (including the housing 34 if necessary).

The filter unit 20 has one or more holes 21 provided for inserting the contact element 33 into the alumina ceramic substrate 11, and further has a filter function member and a ground electrode corresponding to the holes 21. Here, the so-called "filtering functional element corresponding to the hole" refers to a functional element capable of filtering the above-mentioned contact element 33 inserted through the hole. The above-mentioned filter functional parts 10 in FIG. 2 and FIG. 3 are arranged around the holes 21 respectively, but it is not necessary to be arranged around all the holes. In addition, it is not necessary to arrange around the hole 21 , for example, it may be arranged adjacent to the hole 21 .

The aforementioned holes 21 are generally the same as the number of contact elements 33 used.

The aforementioned filter function 10 is preferably formed from conductors as well as dielectrics and/or ferrites. Furthermore, when a high capacitance is required, it is preferable to use a multilayer printed ceramic capacitor as the filter function part 10 . When the above-mentioned filter functional part 10 is made of a conductor and a dielectric, as shown in FIG. The electrode 14 and the glass protective layer 15 of the dielectric layer 13 constitute. In the filter unit 20 shown in FIG. 2 , the above-mentioned upper electrode 14 also functions as the above-mentioned ground electrode.

In addition, the filter function part 10 shown in FIG. 3 is comprised from a conductor, a dielectric, and a ferrite. That is, in the filtering function part 10 shown in FIG. 3 , the ferrite 56 is arranged around the above-mentioned hole 21, the lower electrode 12 is arranged around it, and the upper electrode 14 is arranged and sandwiched between the lower electrode 12 and the upper electrode. The dielectric layer 13 and the glass protective layer 15 covering the upper electrode 14 and the dielectric layer 13. In the filter unit shown in FIG. 3 , the upper electrode 14 also functions as the ground electrode.

However, the above-mentioned filter unit 20 is not limited to the above-mentioned various shapes, and its material, shape, structure, manufacturing method, etc. can be appropriately changed.

The filter unit 20 mentioned above is preferably manufactured by printing technology, most preferably by thick film printing technology.

The above-mentioned filter function part 10 is not limited to be arranged on only one side of the above-mentioned alumina ceramic substrate 11 , but also can be arranged on both sides of the above-mentioned alumina ceramic substrate 11 or alternately arranged on the front and back sides.

In addition, if the above-mentioned filtering function part 10 is in the state shown in FIGS. The lower electrode 12 is used as a ground electrode, and the upper electrode 14 is connected to the contact member 33 . Furthermore, in some filter functional parts of the upper filter unit 20, the above-mentioned upper electrode 14 can also be used as a ground electrode, and the above-mentioned lower electrode 12 is connected on the above-mentioned contact element 33; Used as a ground electrode, the upper electrode 14 is connected to the contact member 33 .

The above-mentioned leaf spring 31 can be any material and/or structure as long as it has spring properties or elastic properties and electrical conductivity, for example, a plate, spring, washer, rubber or resin can be used.

The above-mentioned alumina ceramic substrate 11 is not particularly limited, and other materials may be used as long as they have insulating properties.

The above-mentioned dielectric is not particularly limited, preferably a dielectric with a lead-based perovskite structure, particularly preferably one containing Pb(Mg _1/3 Nb _2/3 )O ₃ , Pb(Zn _1/3 Nb _{2 /3} ) At least one dielectric material selected from the group consisting of O ₃ , PbTiO, and Bi ₂ O ₃ .

The contact element 33 is inserted into the hole 21 provided in the filter unit 20 and fixed by a fixing means. There is no special limitation on the fixing means, for example, the above-mentioned fixing element 33 can be fixed on one or both sides of the above-mentioned filter unit 20 by soldering. When the above-mentioned contact element 33 is fixed on the above-mentioned filter unit 20 by soldering, the above-mentioned filter unit 20 is preheated before soldering, so as to prevent the occurrence of cracks. In addition, if you perform ultrasonic cleaning after soldering, the residue of flux can be removed, so that there will be no bad influence over time.

When the above-mentioned filter unit 20 with the above-mentioned contact element 33 inserted and fixed is assembled on the above-mentioned shielding frame 32 (if necessary, the above-mentioned housing 34), the above-mentioned leaf spring 31 is clamped by the above-mentioned shielding frame 32 and the above-mentioned filter unit 20, without Soldering can electrically connect the above-mentioned ground electrode 14 of the above-mentioned filter unit 20 and the above-mentioned shielding frame 32 , and can also mechanically fix the above-mentioned filter unit 20 and the above-mentioned shielding frame 32 . The above-mentioned leaf spring is not limited to one, and a plurality of them may be used as necessary. The electrical connector 30 with filter assembled in this way does not use soldering because the shielding frame 30 and the filter unit 20 do not use soldering, so there will be no cracks due to the heat during soldering, no corrosion to the silver electrodes, and no soldering. When the flux residue, in addition to the periodic changes in temperature also has a strong adaptability.

The assembly sequence of the contact element 33 , the filter unit 20 , the housing 34 , the shield frame 32 , the leaf spring 31 and the stopper pin 35 varies according to the shape of the connector, and there is no special limitation thereto.

Hereinafter, the electric connector with filter of the second invention will be described in detail with reference to the figure showing the preferred state.

4 is a perspective view showing a preferred state of an electrical connector with a filter according to the second invention; FIG. 5 is an exploded perspective view of the electrical connector with a filter shown in FIG. 4; FIG. 6 is an electrical connector with a filter according to the second invention; An exploded perspective view of other preferred states of the connector, Fig. 7 is a cross-sectional view along the line K-K' in Fig. 6, and Fig. 8 (A)-(C) is a perspective view showing various states of the contact element with a stopper picture.

In the following description, the points that are the same as those in FIGS. 1 to 3 described in the first invention will not be repeated. The detailed description for FIGS. 1-3 also applies here. In addition, in FIGS. 4-8, the same components as those in FIGS. 1-3 are given the same symbols.

As shown in Figures 4-7, the electrical connector with filter of the second invention includes a shielding frame 32, a filter unit 20 having a hole, a contact element 33 inserted into the hole 21 and having a stopper 62, embedded in the contact The clamp 42 in the element 33 , the leaf spring 31 and the housing 34 sandwiched between the shield frame 32 and the filter unit 20 . Furthermore, the shield frame 32 , the plate spring 31 , the filter unit 20 , the contact member 33 , the clamp 42 , and the housing 34 are assembled and fixed with the fixing pin 35 .

Like the first invention, the leaf spring 31 has a shape in contact with the ground electrode 14 of the filter unit 20 and the shield frame 32 so that the ground electrode 14 and the shield frame 32 are electrically connected. Furthermore, the leaf spring 31 is sandwiched between the filter unit 20 and the shield frame 32 to mechanically hold and fix the filter unit 20 , the shield frame 32 and the housing 34 .

The contact element 33 is inserted into the hole 21 from below the filter unit. The clip 42 is inserted from below the contact element 33 and sandwiched between the filter unit 20 and the housing 34 . Preferably, the housing 34 can accommodate the filter unit 20 . The contact element 33 is pressed against the filter unit by the clip 42 through the stopper 62 and fixed.

The above-mentioned filter unit 20, the above-mentioned filter function member 10, and the above-mentioned ground electrode 14 are also applicable to the second invention in detail in the above-mentioned first invention.

In the assembly of the electric connector with filter of the second invention, the assembly is carried out in the order of the above-mentioned shield frame 32, the above-mentioned leaf spring 31, the above-mentioned filter unit 20, the above-mentioned contact element 33, the above-mentioned clamp 42 and the above-mentioned housing 34. , is fixed by the stopper pin 35, and the electrical connector with the filter can be made completely without soldering. But the order of assembling is different according to the shape of the connector, and there is no special limitation thereto.

Regarding the above-mentioned leaf spring 31, the detailed explanations in the above-mentioned first invention are also applicable to the second invention.

The clamp 42 can electrically connect the electrode formed by the conductor and the contact element 33 while mechanically fixing the contact element 33 , especially when the filter function component 10 is composed of a conductor and a dielectric. The material and shape of the clamp are not particularly limited, for example, washers, springs or rubber can be preferred. In FIGS. 4 and 5 , rubber is used as the jig 42 , and in FIGS. 6 and 7 , a washer is used as the jig 42 .

There is no special limitation on the shape of the stopper 62 in the contact element 33 , as long as it can cooperate with the clamp 42 to press the contact element 33 on the filter unit 20 , any shape is acceptable. For example, contact elements as shown in Figs. 8(A)-(C) may be used.

The electrical connector 30 with filter assembled in this way does not use soldering because the shielding frame 32 and the filter unit 20 do not use soldering, and the contact element 33 and the filter unit 20 do not use soldering, so it will not occur due to soldering. Cracks caused by heat, silver electrodes are not corroded at all, and there is no flux residue during soldering, and the adaptability to periodic changes in temperature is also enhanced.

Embodiments of the electrical connector with filter of the present invention will be described below. However, the electrical connector with filter of the present invention is not limited by the following embodiments. Example 1

Make electrical connectors with filters as shown in Figure 1 and Figure 2.

That is, at first, on the both sides of the alumina ceramic substrate 11 having the porous 21 and the inner wall surface of the hole 21, use the Ag-Pd series conductive paste to screen-print the pattern of each electrode of the filter function part 10, after drying, at 850 ℃ for 10 minutes to form the lower electrodes 12, 12'. Next, a dielectric paste mainly composed of Pb(Mg _1/3 Nb _2/3 )O ₃ and Pb(Zn _1/3 Nb _2/3 ) is screen-printed and dried to form an overlapping portion on the lower electrode 12 . Screen printing of the dielectric paste may be performed once or several times, but in this embodiment, screen printing and drying are performed three times. Next, sintering was carried out at a peak temperature of 900° C. for 10 minutes to form dielectric layer 13 . Furthermore, Ag-Pd based conductive paste was screen-printed and dried so as to overlap the conductive layer but not directly contact the lower electrode 12 , and then sintered at 900° C. for 10 minutes to form the upper electrode 14 . Then screen-print the exposed surface of the lower electrode and the parts other than the longitudinal ends of the upper electrode and dry the glass paste for coating the outer layer, then sinter at 530°C for 10 minutes to form a glass protective layer 15, thereby making a filter Unit 20.

Then, on the hole 21 of the filter unit 20, insert the contact element 33 through, after preheating at about 180°C, solder the contact element 33 from both sides of the filter unit 20 with solder, and fix the contact element 33 on the filter unit. At the same time, the cell 20 is electrically connected to the lower electrodes 12, 12'. Ultrasonic cleaning is then performed to remove the flux.

Subsequently, the leaf spring 31 is sandwiched between the filter unit 20 and the shielding frame 32 where the contact element 33 is fixed, and together with the housing 34, fixed with a fixing pin 35, an electrical connector with a filter is produced. The leaf spring 31 electrically connects the upper electrode 14 and the shield frame 32 , and as a result, the upper electrode 14 serves as a ground electrode, and together with the shield frame 32 , the electromagnetic wave shielding effect is enhanced. That is, the electrical connector with filter of this embodiment has a high noise attenuation effect. In addition, since the contact element 33 is soldered from both sides of the filter unit 20, the fixing strength is very strong and the reliability is also high. Example 2

Make an electrical connector with a filter as shown in Figure 3.

That is, first, a ferrite paste was screen-printed on the inner walls of the holes 21 of the alumina ceramic substrate 11 having the pores 21 , dried, and then fired at 900° C. for 10 minutes to form the ferrite layer 56 . Next, Ag—Pd conductive paste was screen-printed on one surface of the alumina ceramic substrate 11, dried, and then fired at 850° C. for 10 minutes to form the lower electrode 12 . Subsequently, a dielectric layer 13 , an upper electrode 14 , and a glass protective layer 15 were formed substantially in the same manner as in Example 1, thereby producing a filter unit 20 .

Then, in the hole 21 of the filter unit 20, insert the contact element 33 through, after preheating at about 180°C, solder the contact element 33 from one side of the filter unit 20 with solder, and fix the contact element 33 on the filter unit 20, while electrically connecting with the lower electrode 12. Next, ultrasonic cleaning is performed to remove flux.

Then, similarly to the first embodiment, the leaf spring 31 is sandwiched between the filter unit 20 and the shielding frame 32, and fixed together with the housing 34 with fixing pins to form the electrical connector 30 with a filter. The leaf spring 31 electrically connects the upper electrode 14 and the shield frame 32 , and as a result, the upper electrode 14 serves as a ground electrode, and together with the shield frame 32 , the electromagnetic wave shielding effect is improved. That is, the electric connector with filter of this embodiment has a high effect of attenuating noise. Example 3

Make electrical connectors with filters as shown in Figure 4 and Figure 5.

That is, first, the filter unit 20 having the filter function member 10 and the ground electrode is fabricated by substantially the same operation as in the first embodiment.

Next, insert the contact element 33 with the stopper 62 into the hole 21 through from the bottom of the filter unit 20 (the surface that does not form the filter function), and then insert the contact element insertion hole as a jig from the same direction. The rubber 42 engages on the contact element 33 . Then, assemble the shield frame 32, the plate spring 31, the filter unit 20 and the housing 34 in this order, fix them with the fixing pin 35, and make an electrical connector with a filter without soldering.

In the electrical connector with filter manufactured in this way, the upper electrode 14 of the filter function member 10 serving as a ground electrode is electrically connected to the shield frame 32 through the plate spring 31 . In addition, the contact element 33 pressed against the filter unit 20 by the rubber 42 via the stopper 62 is electrically connected to the lower electrode of the filter function part 10 . As a result, the electrical connector with filter of this embodiment has a high electromagnetic wave shielding effect and a high noise attenuation effect. Moreover, it is manufactured with a simplified assembly process without soldering, no cracks, no flux residues, strong resistance to cyclical changes in temperature, and high reliability. Example 4

Fabricate the electrical connector with filter shown in Fig. 6 and Fig. 7 .

That is, first, the filter unit 20 having the filter function member 10 and the ground electrode is fabricated by substantially the same operation as in the first embodiment.

Next, insert the contact element 33 with the stopper 62 into the hole 21 from the bottom of the filter unit 20 (the surface that does not form the filter function), and then from the same direction, insert the washer 42 as a clamp into the contact. Element 33. Subsequently, the shield frame 32, the leaf spring 31, the filter unit 20 and the housing 34 are assembled in this order, and they are assembled and fixed with the fixing pin 35 to make an electrical connector with a filter without soldering.

The electrical connector with a filter manufactured in this way electrically connects the upper electrode 14 of the filter kinetic element 10 which functions as a ground electrode and the shielding frame 32 through the leaf spring 31 . Furthermore, the contact element 33 , which is pressed against the filter unit 20 via the stop 62 with the washer 42 , is connected to the lower electrode of the filter function 10 . As a result, the electrical connector with filter of this embodiment has a high electromagnetic wave shielding effect and a high noise attenuation effect. Moreover, it is manufactured with a simplified assembly process without soldering, no cracks, no flux residues, strong resistance to temperature cycle changes, and high reliability. Example 5

Except that a spring is used instead of the washer 42 as the jig in Example 4, the same operation as in Example 4 is used to fabricate an electrical connector with a filter, and the same result as in Example 4 is obtained.

The preferred embodiments of the present invention have been described above, but they are only used for understanding the present invention, and various changes can be made as long as they do not exceed the scope of the present invention.

Industrial Applicability

The electric connector with filter of the present invention has high electromagnetic wave shielding effect and good effect of attenuating unnecessary signals of electromagnetic waves. Moreover, the filter unit and the shielding frame are not soldered, so there is no need to worry about cracks, strong resistance to temperature cycle changes, and high reliability. In particular, in the electric connector with filter of the first invention, the shielding frame, the plate spring, and the filter unit (and if necessary, the housing) are stacked, and electrical connection and mechanical fixation can be performed only by fixing pins. Simplify the process. In addition, especially in the electrical connector with filter of the second invention, since there is no soldering process at all, the assembly process is simplified, and at the same time, there are no cracks and no flux residues at all, and the resistance to temperature cycle changes is stronger. Higher reliability.

Claims (11)

1, the electric connector of band filter, comprise shielded rack, have the hole filter unit, insert the contact element in this hole and be clipped in this shielded rack and this filter unit between leaf spring, it is characterized in that:

Above-mentioned filter unit has the filter function spare and the grounding electrode in corresponding above-mentioned hole;

Above-mentioned grounding electrode and above-mentioned shielded rack are electrically connected by above-mentioned leaf spring;

Above-mentioned filter unit and above-mentioned shielded rack keep mechanical fixed by above-mentioned leaf spring.

2, the electric connector of the described band filter of claim 1 is characterized in that the matrix of filter unit inserts fixedly contact element.

3, the electric connector of the described band filter of claim 1 is characterized in that also having housing, and above-mentioned shielded rack, above-mentioned filter unit, above-mentioned leaf spring and above-mentioned housing are fixed.

4, the electric connector of the described band filter of claim 1 is characterized in that above-mentioned filter function spare is to be made of conductor and dielectric and/or ferrite.

5, the connector of the described band filter of claim 4 is characterized in that above-mentioned dielectric contains the (Mg from Pb _1/3Nb _2/3) O ₃, Pb (Zn _1/3Nb _2/3) O ₃, PbTiO ₃And Bi ₂O ₃Form select among the group at least a.

6, the electric connector of the described band filter of claim 1 is characterized in that above-mentioned leaf spring is plate, spring, packing ring, rubber or the resin with spring property or elastic force character and conductivity.

7, the electric connector of band filter, comprise shielded rack, have the hole filter unit, connect ground insert this hole and have retainer contact element, insert the anchor clamps of this contact element and be clipped in this shielded rack and this filter unit between leaf spring, it is characterized in that:

Above-mentioned filter unit has the filter function spare and the grounding electrode in corresponding above-mentioned hole;

Above-mentioned grounding electrode and above-mentioned shielded rack are electrically connected by above-mentioned leaf spring;

Above-mentioned filter unit and above-mentioned shielded rack keep mechanical fixed by above-mentioned leaf spring;

Above-mentioned contact element is pressed on the above-mentioned filter unit with above-mentioned anchor clamps by above-mentioned retainer.

8, the electric connector of the described band filter of claim 7 is characterized in that the above-mentioned functions part is to be made of conductor and dielectric and/or ferrite.

9, the electric connector of the described band filter of claim 8 is characterized in that above-mentioned dielectric contains the (Mg from Pb _1/3Nb _2/3) O ₃, Pb (Zn _1/3Nb _2/3) O ₃, PbTiO ₃And Bi ₂O ₃Form select among the group at least a.

10, the electric connector of the described band filter of claim 7 is characterized in that above-mentioned leaf spring is plate, spring, packing ring, rubber or the resin with spring property or elastic force character and electrical conductance.

11, the electric connector of the described band filter of claim 7 is characterized in that above-mentioned anchor clamps are packing ring, spring or rubber.

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