JP3930427B2 - Electrical connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electrical connector used in an electronic device or an electrical device, and more particularly to an electrical connector that matches the characteristic impedance while maintaining the elasticity of the contact.
[0002]
[Prior art]
As a general connector, a required number of contacts and a housing having a fitting port into which a mating connector or a board is inserted are fixed, and the contacts are fixed by press-fitting, a lance or the like. The contact includes a contact portion that contacts a mating connector or a substrate, a fixed portion that is fixed to the housing, and a connection portion that is connected to the substrate. In order to match the characteristic impedance, the distance between adjacent contacts is generally the same. Further, in order to ensure the elasticity of the contact, it is necessary to distribute the stress on the spring, thin the contact portion side, things like thickening the side closer to the fixed portion has been common practice .
[0003]
[Patent Document 1]
SUMMARY OF THE INVENTION According to the abstract of Japanese Patent Application Laid-Open No. 2000-340282, it is intended to provide a low inductance electrical connector for connecting an electrical component to a circuit board, a horizontal base, a slot for accommodating an edge of the electrical component, and a plurality of terminals A housing having a cavity, and having a plurality of conductive terminals having a tail portion extending from the base and a resilient contact portion attached to the terminal cavity, the contact portion having a minimum overall length. The contact portion has a substantially flat main body portion extending substantially vertically in the terminal cavity and a bump formed on the main body portion projecting inward into the slot. In this document 1, in order to match the characteristic impedance and at the same time improve the elasticity with the contact portion, only the portion in contact with the counterpart as shown in FIGS. 4 and 8 is bent by bending.
[0004]
[Patent Document 2]
According to the summary of Japanese Patent Laid-Open No. 5-159931, a high-density connector in which jack terminals in which a longitudinal cross section in a straight region excluding a contact portion is formed in a U-shape are arranged at high density on an insulator, The purpose is to reduce the amount of capacitance that can exist between adjacent terminals, thereby suppressing the occurrence of crosstalk between adjacent terminals and improving the characteristics as a connector. A plurality of jack terminals whose other ends are formed as external connection terminals after passing through the straight portion formed in the shape of "", and the jack terminals are arranged in a matrix of a plurality of rows at the straight portion. A high-density connector having at least an insulator to be fixed, wherein the jack terminal has a straight portion and a facing area reduction means between the jack terminal adjacent in the row direction. It has been configured to include a hole and chipping in. As described in Paragraph No. 0029 of the specification, this document 2 can reduce a facing area between adjacent terminals by providing a contact hole and appropriately setting the size of the hole. Therefore, the capacitance generated between the terminals can be reduced and the crosstalk between the terminals is reduced.
[0005]
[Patent Document 3]
According to the summary of Japanese Utility Model Application Laid-Open No. 5-73882, a connector body in which a corresponding connector is connected to the front side of the connector is provided on the rear side with the object of providing a connector having a good high-frequency characteristic without variation in characteristic impedance. A mounting body to be connected to the substrate B is provided, the mounting body is substantially L-shaped, a plurality of terminals are provided on one end side, a connection hole for inserting the contact 1 is provided on the other end side, and a corner of the mounting body is provided. An inclined part is provided inside the part, and a wiring pattern connecting the upper half contact and the rear half terminal is formed on the inclined part, and these are formed to have a uniform width and are used for signal lines. Arrange ones for ground lines alternately at equal intervals. Similarly, a signal line wiring pattern and a ground line wiring are formed on the outside of the insulator from the lower half to the front half to connect the contacts and the terminals. As described in Paragraph No. 0016 of this specification, since the width and interval of the signal line wiring pattern and the ground line wiring are uniform, the characteristic impedance in the connector differs depending on the conductor part. However, there is a description in which a square hole is provided in the contact as shown in FIG. 2, but the purpose is not described.
[0006]
[Patent Document 4]
According to the summary of Japanese Patent Application Laid-Open No. 11-31260, an object of the present invention is to provide an electrical connector capable of high-speed transmission without causing crosstalk even with a tuning hawk-type socket contact arranged at a narrow pitch. A connecting part that is held and fixed to the insulator and connected to the substrate on one end side, a fixing part that is fixed to the insulator at a substantially central part, and a contact part that contacts the mating contact on the other end side are arranged in parallel. In the electrical connector comprising a socket contact composed of two contact pieces, a hole is provided in the vicinity of the center of the fixed portion of the socket contact. FIG. 1 of this document 4 discloses a square hole, and paragraph number 0010 of the specification states that the shape of the hole may be circular, square, or triangular.
[0007]
[Problems to be solved by the invention]
In a typical connector structure as described above, in order to ensure consistency of the characteristic impedance, to be the same distance between adjacent contacts, the width of the fixing portion and the contact portion had to be the same . Further, in order to ensure the elasticity of the contact, it is necessary to distribute the stress on the spring, thin the contact portion side, there is necessary to increase the side closer to the fixed portion. As described above, there is a problem to be solved that there is a contradictory relationship between matching the characteristic impedance and ensuring the elasticity of the contact.
If the characteristic impedance is not matched, a transmission loss occurs, and high-speed transmission cannot be achieved. If the elasticity of the contact is not ensured, it will be permanently deformed immediately after repeated insertion / extraction with a counterpart (connector, board, etc.), resulting in poor connection.
[0008]
The present invention has been made in view of such a conventional problem, and provides an electrical connector capable of matching the characteristic impedance while ensuring the elasticity of the contact portion of the contact.
This object can also be achieved in Document 1, but this method is not suitable for removal of a large number of members because of high contact pressure. Documents 2 to 4 have a description that holes are provided in the contacts, but all have different purposes.
[0009]
[Means for Solving the Problems]
The above object is achieved by a required number of contacts 14 having a contact portion 16 that contacts a mating connector or substrate, a fixing portion 18 fixed to the housing 12, and a connection portion 22 connected to the substrate, and the contacts 14 are fixed. And an electrical connector 10 including a housing 12 having a fitting port 28 into which a mating connector or board is inserted.
In order to match the characteristic impedance, by making the width dimension between the contact portion 16 and the fixed portion 18 of the contact 14 the same, the distance between the contacts 14 in the longitudinal direction is made equal, and the contact In order to improve the elasticity of the contact portion 16 of the contact hole 14, the side close to the contact portion 16 is wide between the contact portion 16 and the fixing portion 18 of the contact 14, and the hole becomes narrower as the fixing portion 18 is approached. This can be achieved by providing 20.
[0010]
Between the contact 14 in the longitudinal direction of the adjacent to the same interval, achieving characteristic impedance matching, and, in order to improve the elasticity of the contact portion 16 of the contact 14, wider closer to the contact portion 16, the The hole 20 is provided so as to become thinner as it approaches the fixing portion 18. The shape of the hole 20 is a triangle.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The connector of the present invention will be described based on the drawings.
FIG. 1 is a perspective view of a partial connector of the present invention. FIG. 2 is an explanatory diagram of the contact arrangement.
The connector 10 of the present invention mainly includes a housing 12 and contacts 14.
[0012]
It described the components of the connector 10 of the present invention based on FIG.
First, the contact 14 which is the point of the present invention will be described. The contact 14 is made of metal and is manufactured by a known press working. Examples of the material include brass, beryllium copper, phosphor bronze, and other copper alloys in consideration of springiness and conductivity. Considering conductivity and springiness, beryllium copper is ideal.
[0013]
The contact 14 is provided mainly with said connecting portion 22 connected to the fixed portion 18 and the substrate or the like and the contact portion 16 that contacts the mating connector and the substrate is fixed to the housing 12. The contact portion 16 protrudes into a convex shape so that it can easily come into contact with the mating connector or the substrate. In this embodiment, the contact 14 has a substantially L shape and is fixed to the housing 12 by press-fitting or lance (hook).
[0014]
In order to match the characteristic impedance, the contacts 14 are arranged so that the contacts 14 adjacent in the longitudinal direction have the same spacing as shown in FIG. That is, the from the contact portion 16 of the contact 14 to the same width dimension between the fixing portion 18, and between the contact 14 adjacent the longitudinal direction so that the same interval. Characteristic impedance matching is achieved by making the distance between adjacent contacts 14 in the longitudinal direction the same. In order to match the characteristic impedance, it is necessary to at least make the dimension between the substrate connecting portion and the contact portion of the adjacent contact the same.
[0015]
When the mating connector and the substrate or the like is inserted into the fitting opening 28 of the housing 12, the contact 14 is displaced in the fulcrum the fixing portion 18, and is connected to the mating connector or the like. As described above, since the fixed portion 18 is displaced as a fulcrum, it must be dispersed so that stress is not concentrated on this portion. Therefore, a hole 20 is provided between the contact portion 16 and the fixed portion 18 of the contact 14. That is, the hole 20 is for improving the elasticity of the contact portion 16 of the contact 14 while achieving characteristic impedance matching, wide closer to the contact portion 16, as coming close to the fixed portion 18 I try to make it thinner. The shape of the hole 20 is appropriately designed so as to satisfy the above role, but in the present embodiment, it is a triangle.
In the present embodiment, the connection portion 22 is a surface mount type (SMT), but may be a dip type.
[0016]
It described the components of the connector 10 of the present invention based on FIG.
Next, the housing 12 will be described. The housing 12 is an electrically insulating plastic and is manufactured by a known technique of injection molding. The material is appropriately selected in consideration of dimensional stability, workability, cost, etc. Generally, polybutylene terephthalate is used. (PBT), polyamide (66PA, 46PA), liquid crystal polymer (LCP), polycarbonate (PC), and synthetic materials thereof.
[0017]
The housing 12 has a fitting opening 28 of the mating connector and the substrate is inserted is provided, also, the insertion hole 26 is provided with the contact 14 of the required number is attached, the said contact 14 contact portion 16 is fixed by the fitted in press-fitting, hooking to project abutment within 28 (lancing), welding or the like. The insertion hole 26 of the contact 14 of the required number is attached are provided so as to correspond to the contact portion of the mating connector and the substrate, the size thereof as long fixing said contacts 14, size of the contact 14 and the The housing 12 is designed appropriately in consideration of the strength. The size of the fitting port 28 may be any size as long as the mating connector or board can be inserted, and is appropriately designed according to the size of the mating connector or board.
[0018]
In the present embodiment, flange portions 24 are provided on both sides in the longitudinal direction of the housing 12, and the mounting holes 32 in which the fixing tools 30 for fixing the electrical connector 10 to the board are mounted in the flange portions 24. Is provided. The size of the mounting hole 32 is appropriately designed in consideration of the miniaturization of the electrical connector 10 and the strength of the housing 12.
[0019]
Finally, the fixture 30 used in the present embodiment will be described.
The fixture 30 is made of metal and is manufactured by a known press working process, and examples of the material include brass, beryllium copper, phosphor bronze, and other copper alloys in consideration of springiness and conductivity. .
The fixture 30 is mounted to the mounting hole 32 of the housing 12, so that it can be fixed to the substrate, and suitably designing the shape and size.
[0020]
【The invention's effect】
As apparent from the above description, according to the connector 10 of the present invention, excellent effects as follows can be obtained.
(1) between the longitudinal direction of the contact 14 to the same interval, because the hole 20 is provided between the contact portion 16 and the fixed portion 18 of the contact 14, between the contacts 14 of adjacent longitudinal the becomes equal intervals, it is possible to mow FIG matching of characteristic impedances, it is possible to ensure the elasticity of the contact portion 16 of the contact 14.
(2) wide closer to the contact portion 16, since the provided the hole 20 such that tapered toward the fixing portion 18, while ensuring easy elasticity of the contact 14, the matching of the characteristic impedance Can be planned.
(3) the shape of the hole 20 by the triangle, it is possible to secure easily the elasticity of the contact 14.
[Brief description of the drawings]
FIG. 1 is a perspective view of a connector of the present invention, partially cut away.
FIG. 2 is a diagram illustrating an arrangement of contacts.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Connector 12 Housing 14 Contact 16 Contact part 18 Fixing part 20 Hole 22 Connection part 24 Flange part 26 Insertion hole 28 Fitting port 30 Fixing tool 32 Mounting hole

Claims (1)

A required number of contacts having a contact portion that contacts the mating connector or board, a fixing portion that is fixed to the housing, and a connection portion that is connected to the board, and a fitting in which the mating connector or board is inserted while the contact is fixed In an electrical connector comprising a housing having a joint,
By from the contact portion of the contact in order to ensure consistency of the characteristic impedance at the same width dimension between the fixed portion and between the contacts arranged in the longitudinal direction at the same intervals, and the of the contact the contact part of the contact in order to improve the elasticity of the contact portion with the wide side closer to the contact portion between the fixing portion, the electrical connector and providing a narrowing hole as it approaches the fixed part .

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