Cable connector

Abstract

Provided is a coaxial cable connector capable of improving EMC (electromagnetic compatibility). A GND housing (210) is provided with a plurality of spring parts (211) having cantilever-shaped spring part bodies (211a) extending toward a GND housing (110) (referring to Figure 3) of a counterpart connector (100) (referring to Figure 3), the plurality of spring parts (211) being disposed at rotationally symmetrical positions with the center of the cylindrical GND housing (210) as the center of rotation. A long-hole-shaped hollow part 211b having a long side in the direction in which the spring part body 211a extends is formed in the center of the spring part body 211a of the plurality of spring parts 211.

Description

Technical Field

[0001] This case involves a coaxial cable connector. Background Art

[0002] In order to improve the performance of coaxial cable connectors for vehicles, it is necessary to optimize high-frequency transmission characteristics. For example, in coaxial cable connectors such as relay connector devices for relay cables, if the electromagnetic compatibility (EMC) is reduced due to gaps between the parts, the risk of electromagnetic interference increases.

[0003] [Patent Document 1] Japanese Patent Publication No. 2004-206908 Utility Model Content

[0004] Patent Document 1 discloses that a slit is provided at a spring contact to improve spring characteristics. In addition, in general, in a relay connector device, a connection is made by pressing a male GND shell with a spring provided on a female GND shell at a position where a male connector is inserted into a female connector.

[0005] On the other hand, it is known that the shape or arrangement of the spring provided on the female GND case affects EMC. Therefore, there is a demand for sufficiently fixing the male GND case and improving EMC by adjusting the shape or position of the spring provided on the female GND case.

[0006] The purpose of this case is to solve this problem and provide a coaxial cable connector that can improve EMC.

[0007] According to the viewpoint of the present case, a cable connector is provided, wherein the cable connector has a cylindrical GND shell electrically connected to the GND shell of the counterpart connector, the GND shell has a plurality of spring portions, the plurality of spring portions have a cantilever beam-shaped spring portion body extending toward the GND shell of the counterpart connector, the plurality of spring portions are arranged at rotationally symmetrical positions with the center of the cylindrical GND shell as the rotation center, and a long hole-shaped hollow portion having long sides in the extension direction of the spring portion body is formed in the central portion of the spring portion body.

[0008] According to the utility model, a coaxial cable connector capable of improving EMC can be provided.

[0009] The above and other objects, features and advantages of the present invention will become more fully understood from the detailed description and accompanying drawings given below, which are given by way of illustration only and thus should not be construed as limiting the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a perspective view showing an example of a male connector in the relay connector device according to the first embodiment.

[0011] Figure 2 This is a perspective view showing an example of the female connector in the relay connector device according to the first embodiment.

[0012] Figure 3 It is a cross-sectional view of the male connector and the female connector in the relay connector device according to the first embodiment.

[0013] Figure 4 This is an exploded perspective view showing and illustrating the components constituting the male connector in the relay connector device according to the first embodiment.

[0014] Figure 5 This is an exploded perspective view showing, by way of example, each member constituting the female connector in the relay connector device according to the first embodiment.

[0015] Figure 6 This is an enlarged perspective view of the GND shell of the female connector of the first embodiment.

[0016] Figure 7 This is a diagram showing the GND shell of the female connector of the first embodiment as viewed from the X direction.

[0017] Figure 8 This is a diagram showing an example of the comparison result of the EMC characteristics between the relay connector device of the first embodiment and the conventional relay connector device.

[0018] Fig. 9 It is an exploded perspective view showing, by way of example, each component constituting a female-side connector in a related relay connector device. DETAILED DESCRIPTION

[0019] The specific structure of the present embodiment is described below with reference to the accompanying drawings. The following description discloses the preferred embodiment of the present invention, but does not limit the scope of the present invention to the following embodiment. In the following description, the same reference numerals are used to disclose substantially the same contents. In order to avoid complication of the drawings, some reference numerals and hatching are omitted.

[0020] The coaxial cable connector of the embodiment is described. Hereinafter, as an example of the coaxial cable connector of the embodiment, a relay connector device for relaying a cable is described. In addition, the coaxial cable connector of the embodiment is not limited to a relay connector device, and may include other connector devices such as a coaxial connector device for fitting a cable to a substrate as long as it is a coaxial cable connector for connecting a coaxial cable.

[0021] Figure 1This is a perspective view showing an example of the exposed connector 100 in the relay connector device 10 according to the first embodiment. Figure 2 FIG. 2 is a perspective view showing an example of a connector 200 in the relay connector device 10 of the first embodiment. Figure 1 and Figure 2 In the figure, the external housing is omitted, and the relay connector device 10 can also be used separately from the external housing.

[0022] like Figure 1 and Figure 2 As shown, the relay connector device 10 includes a connector 100 and a connector 200. Here, the connector 100 is a male connector, and the connector 200 is a female connector. In addition, the connector 100 is connected to the end of the cable 190, and the connector 200 is connected to the end of the cable 290. Here, Figure 3 It is a cross-sectional view of the connector 100 and the connector 200 . In the relay connector device 10 , the connector 100 and the connector 200 are connected to connect the cable 190 and the cable 290 .

[0023] In addition, for the sake of convenience, the relay connector device 10 uses the coaxial axis direction as the X-axis direction. That is, when the connector 100 and the connector 200 are connected, the direction from the male connector 100 to the female connector 200 is the +X-axis direction, and the two directions orthogonal to the X-axis are the Y-axis direction and the Z-axis direction. In addition, the connector with a GND shell of the utility model is the female connector 200, and the counterpart connector is the male connector 100.

[0024] <Male connector 100>

[0025] First, the male-side connector 100 will be described. Figure 4 The figure is an exploded perspective view showing various components constituting the male connector 100 in the relay connector device 10. The male connector 100 includes a GND shell 110, an inner shell 130, a contact 140, a sleeve 150, an impedance adjustment member 160, an EMI shell 170, and an outer shell 180.

[0026] The GND shell 110 is in a substantially cylindrical shape and includes a conductor. As an example, the GND shell 110 is made of a metal including a conductor, but may also be made of a material other than a metal. In addition, the GND shell 110 is electrically connected to a ground potential. Here, the central axis of the GND shell 110 is configured in a manner that becomes the X-axis direction.

[0027] The inner shell 130, the contact 140, and the impedance adjusting member 160 are arranged inside the GND shell 110. In addition, the sleeve 150 and a part of the cable 190 are arranged inside the GND shell 110. The GND shell 110 has a portion covering at least a part of the inner shell 130, and the inner shell 130 can be pressed into the interior of the GND shell 110.

[0028] The internal housing 130 is arranged inside the GND shell 110. In addition, the internal housing 130 is provided with the contact 140 inside and supports the contact 140. For example, the end of the internal housing 130 on the -X axis direction side is located near the end of the contact 140 on the -X axis direction side. In addition, the end of the contact 140 on the -X axis direction side is connected to the core wire 191 of the cable 190 inside the internal housing 130.

[0029] In addition, a part of the impedance adjusting member 160 may be incorporated into the inner housing 130. For example, a part of the impedance adjusting member 160 on the +X axis direction side may be incorporated into the part of the inner housing 130 on the −X axis direction side.

[0030] The contact 140 is a rod-shaped member including a conductor, and functions as a transmission path for transmitting a high-frequency signal. One end of the contact 140 on the +X axis direction side is connected to the contact 240 of the female connector 200 .

[0031] The sleeve 150 has a cylindrical shape and is arranged so that the central axis is in the X-axis direction. For example, the sleeve 150 is formed by two cylindrical parts with different diameters connected side by side in the X-direction.

[0032] The small diameter cylindrical portion 151 is disposed inside the GND shell 110 and covers the shield member 193 exposed from the end of the outer cover 194 of the cable 190. On the other hand, the large diameter cylindrical portion 152 is disposed so as to cover the outer cover 194 of the cable 190.

[0033] The impedance adjusting member 160 has a substantially cylindrical shape and includes a conductor. Here, the impedance adjusting member 160 is arranged so that the central axis thereof is in the X-axis direction.

[0034] The impedance adjustment member 160 has a portion incorporated into the internal housing 130. The impedance adjustment member 160 is not electrically connected to the contact 140 and the core wire 191 as the transmission path of the high-frequency signal line, and may not be electrically connected to the ground potential. In this case, the impedance adjustment member 160 is a hollow ground potential that is not directly connected to other conductors. Alternatively, the impedance adjustment member 160 may also be electrically connected to the ground potential.

[0035] The EMI shell 170 has a semi-cylindrical shape and includes a conductor. The EMI shell 170 is electrically connected to the ground potential by being bonded to the GND shell 110. The EMI shell 170 covers a portion of the GND shell 110, thereby covering the gap of the GND shell 110.

[0036] The outer housing 180 has a square tube shape and includes an insulator. The outer housing 180 accommodates an assembly of the GND shell 110 , the inner housing 130 , the contact 140 , the sleeve 150 , the impedance adjusting member 160 , and the EMI shell 170 .

[0037] The cable 190 has a shape extending in one direction and is flexible. The cable 190 includes a core wire 191, a covering member 192, a shielding member 193, and an outer cover 194. The core wire 191, the covering member 192, the shielding member 193, and the outer cover 194 are arranged in a concentric layer with the core wire 191 as the center. That is, the covering member 192 covers the side of the core wire 191, the shielding member 193 covers the side of the covering member 192, and the outer cover 194 covers the side of the shielding member 193.

[0038] As an example, the core wire 191 includes a copper wire as a linear conductor. The covering member 192 is a tubular insulator. The shield member 193 is a tubular conductor and is electrically connected to the ground potential. The outer cover 194 is a tubular insulator.

[0039] <Female connector 200>

[0040] Next, the female-side connector 200 will be described. Figure 5 It is an exploded perspective view showing and illustrating each member constituting the female connector 200 in the relay connector device 10 .

[0041] The connector 200 includes a GND shell 210 , an inner shell 230 , a contact 240 , a sleeve 250 , an impedance adjustment member 260 , an EMI shell 270 , and an outer shell 280 .

[0042] In the connector 100 described above, the cable 190 is located on the -X axis direction side, whereas in the case of the connector 200, the cable 290 is located on the +X axis direction side of the connector 200. In addition, the basic structures and functions of the GND shell 210, the inner shell 230, the contact 240, the sleeve 250, the impedance adjustment member 260, the EMI shell 270, and the outer shell 280 of the connector 200 are the same as those of the GND shell 110, the inner shell 130, the contact 140, the sleeve 150, the impedance adjustment member 160, the EMI shell 170, and the outer shell 180 of the connector 100, respectively, and descriptions thereof may be omitted.

[0043] The GND shell 210 is substantially cylindrical and includes a conductor. The GND shell 210 is electrically connected to the ground potential. Here, the central axis of the GND shell 210 is arranged to be in the X-axis direction.

[0044] The inner housing 230, the contact 240, and the impedance adjusting member 260 are arranged inside the GND shell 210. In addition, the sleeve 250 and a part of the cable 290 are arranged inside the GND shell 210. The inner housing 230 is press-fitted into the GND shell 210.

[0045] Hereby, Figure 6 2 is an oblique view of the enlarged GND shell 210. Figure 6 As shown, a plurality of spring portions 211 are formed on the outer periphery of the front end of the GND shell 210, which abut against the GND shell 110 of the male connector 100 and press the connector 100. Here, the plurality of spring portions 211 are respectively a cantilever beam-shaped spring contact having one end as a fixed end and the other end as a free end and extending toward the male GND shell 110 as the counterpart. In addition, a spring portion body 211a of the spring portion 211 described later extends toward the male GND shell 110.

[0046] Figure 7 2 is a diagram showing the GND shell 210 from the perspective of the front end side. Figure 6 and Figure 7 As shown, for example, in the GND shell 210, eight spring portions 211 are provided. Figure 7 As shown, generally speaking, the eight spring portions 211 are arranged in an equiangular point-symmetrical manner with the center of the cylindrical GND case 210 as the rotation center.

[0047] In addition, the number of spring portions 211 provided in the GND shell 210 is not limited to 8, and the minimum number is 2. In addition, when the GND shell 210 is revealed from the perspective of the front end side, the plurality of spring portions 211 can be provided at line symmetric positions with a line passing through the center of the GND shell 210 as a line of symmetry.

[0048] In addition, in the GND shell 210, there is a gap between the spring parts 211. Here, as an example of the relationship between the width of the spring part 211 and the size of the gap, in the cross section in the YZ direction at the specified position where the spring part 211 is provided, the spring part 211 is provided in such a manner that the area in the circumferential direction covered by the spring part 211 is larger than the area of ​​the gap. In other words, the plurality of spring parts 211 are provided in such a manner that the area covered by the spring part 211 itself is larger than the gap formed between the spring parts 211.

[0049] In addition, if Figure 6As shown, the spring portion 211 is a leaf spring, comprising: a spring portion body 211a, extending in the extension direction of the cable 290, i.e., slightly in the X direction; a hollow portion 211b, hollowed out in the central portion of each spring portion body 211a to be a long hole with long sides in the extension direction of the cable 290; and a bent portion 211c, bent inward near the front end.

[0050] Hereby, Figure 8 1 is a graph comparing the EMC characteristics of a conventional relay connector device in decibel form with a relay connector device 10, wherein the conventional relay connector device has spring portions unevenly arranged in the circumferential direction in the female side GND shell and no hollow portion is formed in the spring portion, and the relay connector device 10 is, as shown in FIG. Figure 7 As shown, the spring portion 211 is symmetrically arranged at an equal angle point on the female side GND shell 210, and as shown Figure 6 As shown, a hollow portion 211 b is formed in the center of each spring portion body 211 a.

[0051] like Figure 8 As shown, in any relay connector device, there are multiple positions where the decibel value becomes a peak at a frequency of about 0 Hz to about 5300 Hz. However, it can be understood that compared with the existing relay connector device, the peak value of the relay connector device 10 in which the spring portion 211 is symmetrically arranged at equal angles and the hollow portion 211b is improved.

[0052] The number of spring portions 211 may be arbitrarily changed depending on the strength of the male GND shell 110 when pressed by the plurality of spring portions 211 or the shape of the outer housing 280 that avoids the spring portions 211 so as not to abut against the spring portions 211.

[0053] On the other hand, since it is understood that the area covered by the spring portion 211 affects the EMC characteristics, the area can be arbitrarily changed according to the required EMC characteristics.

[0054] Furthermore, other components of the female connector 200 will be described.

[0055] The internal housing 230 is arranged inside the GND shell 210. In addition, the internal housing 230 is provided with the contact 240 inside and supports the contact 240. For example, the end of the internal housing 230 on the -X axis direction side is located near the end of the contact 240 on the -X axis direction side. In addition, the end of the internal housing 230 on the +X axis direction side is located near the end of the contact 240 on the +X axis direction side. In addition, the end of the contact 240 on the +X axis direction side is connected to the core wire 291 of the cable 290 inside the internal housing 230.

[0056] The contact 240 is a rod-shaped member including a conductor, and functions as a transmission path for transmitting a high-frequency signal. One end of the contact 240 on the −X axis direction side is connected to the contact 140 of the male connector 100 .

[0057] The sleeve 250 has a cylindrical shape and is arranged so that the central axis is in the X-axis direction. For example, the sleeve 250 is formed by two cylindrical parts with different diameters connected side by side in the X-direction.

[0058] The small diameter cylinder 251 is disposed inside the GND shell 210 and covers the shield member 293 exposed from the end of the outer cover 294 of the cable 290. On the other hand, the large diameter cylinder 252 is disposed to cover the outer cover 294 of the cable 290.

[0059] The impedance adjusting member 260 has a substantially cylindrical shape and includes a conductor. Here, the impedance adjusting member 260 is arranged so that the central axis thereof is in the X-axis direction.

[0060] The impedance adjustment member 260 has a portion assembled into the internal housing 230. The impedance adjustment member 260 is not electrically connected to the contact 240 and the core wire 291 as the transmission path of the high-frequency signal line, and may not be electrically connected to the ground potential. In this case, the impedance adjustment member 260 is a hollow ground potential that is not directly connected to other conductors. Alternatively, the impedance adjustment member 260 may also be electrically connected to the ground potential.

[0061] The EMI shell 270 has a semi-cylindrical shape and includes a conductor. The EMI shell 270 is electrically connected to the ground potential by being bonded to the GND shell 210. The EMI shell 270 covers a portion of the GND shell 210, thereby covering the gap of the GND shell 210.

[0062] The outer housing 280 has a square tube shape and includes an insulator, and accommodates an assembly of the GND shell 210 , the inner housing 230 , the contact 240 , the sleeve 250 , the impedance adjusting member 260 , and the EMI shell 270 .

[0063] Thus, in the GND shell 210 of the female connector 200, the spring parts 211 are arranged point-symmetrically when viewed from the front end side, and the EMC characteristics can be improved by forming a slit-shaped hollow part 211b in the spring part body 211a of each spring part 211. In addition, the spring part 211 can adjust the strength of the spring force by forming the hollow part 211b in the spring part body 211a, and can adjust the force pressing the male connector 100 and achieve the desired improvement of the EMC characteristics.

[0064] In addition, the present invention is not limited to the above-mentioned embodiments, and can be appropriately changed within the scope of the main purpose. That is, the above-mentioned records are appropriately omitted and simplified in order to make the description clear, and those skilled in the art can easily change, add, and convert the various elements of the embodiments within the scope of the present invention.

[0065] For example, in the above description, although it is described that the female connector 200 includes the GND shell 210 and the EMI shell 270 as a single component, the present invention is not limited thereto.

[0066] That is, if Fig. 9 The female connector 300 shown may also be a structure including two GND shells 310, a GND shell 320, an inner shell 330, a contact 340, a sleeve 350, and an outer shell 380. In this case, in the connector 300, by adjusting the configuration of the spring portion 311 provided at the front end of the GND shell 310 and forming a hollow portion in the spring portion body of the spring portion 311 in advance, the force pressing the male connector can be adjusted and the required EMC characteristics can be improved.

Claims

1. A cable connector, characterized in that: The cable connector has a cylindrical GND shell electrically connected to the GND shell of the counterpart connector. The GND shell includes a plurality of spring portions, each of which has a cantilever beam-shaped spring portion body extending toward the GND shell of the counterpart connector. The plurality of spring portions are arranged at rotationally symmetrical positions with the center of the cylindrical GND shell as the rotation center. A hollow portion in the shape of a long hole having long sides in the extending direction of the spring portion body is formed in the central portion of the spring portion body.

2. The cable connector according to claim 1, wherein: The plurality of spring portions are arranged in such a manner that an area covered by the spring portions themselves is larger than a gap formed between the spring portions.

3. The cable connector according to claim 1 or 2, characterized in that: The plurality of spring portions are arranged at line-symmetric positions with respect to a line passing through the center of the cylindrical GND case as a line of symmetry.

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