connector

Abstract

A connector having good transmission characteristics over a wide frequency band throughout high frequencies is provided. The connector 1 is provided with an outer housing 10, an outer shell 20, a front shell 30, a front housing 40, a pin 50, a rear housing 60, and a rear shell 70. Here, a cutout piece 22 is formed in a portion of the outer shell 20 that extends along the back surface of the outer housing 10. The cutout piece 22 elastically flexes against the rear shell 70. Thus, the rear shell 70 is pushed against the front shell 30 so that no gap is formed therebetween. Through this pushing, the rear shell 70 and the front shell 30 are electrically integrated, achieving good signal transmission characteristics.

Description

Technical Field

[0001] This invention relates to connectors suitable for transmitting high-frequency signals. Background Technology

[0002] In the transmission of high-frequency signals, signal reflection and other issues are prone to occur, making it challenging to achieve good transmission characteristics. In particular, the transmission of video signals requires good transmission characteristics across a wide bandwidth spanning high frequencies.

[0003] Here, Patent Document 1 discloses an invention that gathers the ends of a flat coaxial cable containing multiple coaxial cables and connects them via a common conductive component to form a circuit ground and a frame ground. The purpose of the invention in Patent Document 1 is to eliminate potential fluctuations and impedance discontinuities in the grounding side wiring.

[0004] Prior art literature

[0005] Patent documents

[0006] Patent document 1: Japanese Patent Application Publication No. 8-222325. Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] The purpose of this invention is to provide a connector with good transmission characteristics across a wide bandwidth covering high frequencies.

[0009] Solution for solving the problem

[0010] The connector of the present invention, which achieves the above-mentioned objectives, is characterized by comprising:

[0011] The housing has receiving spaces with openings on a front surface facing the other connector and a back surface facing away from the other connector;

[0012] An outer casing that covers the housing in such a way as to include the back surface of the housing;

[0013] The contact element housed within the aforementioned receiving space enables electrical conduction with the other connector; and

[0014] The inner shell, which is disposed in the aforementioned receiving space, covers the contact elements.

[0015] Between the outer shell and the inner shell, there is a spring portion that elastically pushes the inner shell forward.

[0016] The inner shell needs to house and cover the contact element, therefore a construction is considered that could be either divided into multiple parts, or even if connected as a single unit, partially separated. In this case, the inner shell may have gaps or insufficient contact when not pressed.

[0017] In the connector of this invention, the aforementioned spring portion is provided, and the inner shell is elastically pushed forward. Therefore, even if the inner shell has a structure with gaps or insufficient contact when not pushed, these gaps are filled or sufficient contact is achieved, resulting in good transmission characteristics across a wide frequency band.

[0018] In the connector of the present invention, it is preferable that the inner shell has a front shell and a rear shell that are separated from or partially connected to each other and cover the contact members in a manner that clamps them from the front and rear.

[0019] By constructing the inner shell as such a mutually separate or partially connected structure, the contacts can be covered in a clamping manner from the front and rear.

[0020] Furthermore, in the connector of the present invention, it is preferable that the spring portion is a cut piece provided on the outer shell that is obliquely cut in front and abuts against the inner shell and flexes elastically.

[0021] As a spring component, a cutting tab may be provided in the inner shell, cut rearward, and elastically flexed against the outer shell. In this configuration, the inner shell can also be elastically pushed forward. However, considering that having a cutting tab in the outer shell is more advantageous in signal transmission characteristics than having a cutting tab in the inner shell, having a cutting tab in the outer shell is more preferable.

[0022] Furthermore, whether it is set in the outer shell or the inner shell, the spring part can be constructed with a simple structure by having such a cut piece.

[0023] Furthermore, in the connector of the present invention, it is preferred that,

[0024] The contact has a first extension that extends forward and backward and conducts communication with the other connector, and a second extension that extends downward from the rear end of the first extension and bends to connect to the circuit board.

[0025] The aforementioned cut piece abuts against the inner shell at a position lower than the first extension in the vertical direction.

[0026] The contact element has a first extension extending forward and backward and a second extension extending downward, and the inner shell is also shaped to cover the shape of the contact element extending downward. Therefore, the center of gravity of the inner shell in the vertical direction is located lower than the first extension. Thus, by placing the cutting blade against a position lower than the first extension in the vertical direction, compared to placing it against a position at the same height or above the first extension, the entire inner shell can be pushed forward in a well-balanced manner.

[0027] Preferably, the cut piece is cut at an angle of 45° relative to the vertical direction.

[0028] In this case, a balance must be maintained between ensuring good signal transmission characteristics and sufficient thrust on the inner shell.

[0029] Alternatively, it is also preferable that the above-mentioned slits are cut at an angle smaller than 45° relative to the vertical direction.

[0030] The cutting disc abuts against the inner housing at the height of the second extension of the contact element, which extends upward and downward. When the cutting disc is cut at an angle smaller than 45° relative to the vertical direction, it is nearly parallel to the second extension of the contact element compared to when it is cut at a 45° angle. Therefore, this contributes to a further improvement in signal transmission characteristics.

[0031] Alternatively, it is also preferable to cut the slice at an angle greater than 45° relative to the vertical direction.

[0032] When the cutting blade is cut at an angle greater than 45° relative to the vertical direction, the inner shell can be pushed more forcefully compared to when it is cut at a 45° angle. Therefore, correspondingly, gaps or insufficient contact formed in the inner shell are eliminated more reliably, and the inner shell can be further firmly integrated.

[0033] Furthermore, in the connector of the present invention, it is preferred that,

[0034] It has an inner housing disposed in the aforementioned accommodating space and supporting the contact element.

[0035] The inner shell sandwiches the inner shell between the inner shells and covers the contact parts.

[0036] With the aforementioned inner shell, it is difficult for contact parts to shift, resulting in a more robust connector. Attached Figure Description

[0037] Figure 1 This is a perspective view of a connector according to one embodiment of the present invention.

[0038] Figure 2 Is Figure 1 The figure shows an exploded perspective view of the connector.

[0039] Figure 3 These are perspective views (A) showing the connector of this embodiment along the orientation that reveals its lower surface, and rear views (B) showing the connector of this embodiment.

[0040] Figure 4 It is along Figure 1 The cross-sectional view (A) and the three-dimensional cross-sectional view (B) of arrow AA are shown in the figure.

[0041] Figure 5 This is a graph showing the experimental results.

[0042] Figure 6 This is a graph showing the experimental results.

[0043] Figure 7 This is a diagram showing a modified example of the inner shell. Detailed Implementation

[0044] Figure 1 This is a perspective view of a connector according to one embodiment of the present invention.

[0045] The connector 1 is a connector that is fitted with the other connector (not shown) with its front facing towards it, as indicated by arrow F. Additionally, the connector 1 is mounted on a circuit board (not shown) located below it, as indicated by arrow Z, and soldered to the circuit board.

[0046] Figure 2 Is Figure 1 The figure shows an exploded perspective view of the connector.

[0047] The connector 1 has a housing 10 and a housing 20.

[0048] The housing 10 has a receiving space 11. This receiving space has openings on its front surface facing the other connector (towards the direction of arrow F) and its back surface facing away from the other connector. This housing 10 is an example of a housing described in this invention.

[0049] Additionally, the housing 20 serves as a shield and has a shape that covers the upper surface, left and right side surfaces, and back surface of the housing body 10. The housing 20 is provided with a plurality of pin-shaped solder joints 21 that extend downwards and are soldered to the circuit board.

[0050] In addition, the connector 1 has a front housing 30, a front shell 40, a pin 50, a rear housing 60, and a rear shell 70.

[0051] The pin 50 has a first extension 51 extending forward and backward, and a second extension 52 extending downward from the rear end of the first extension 51. The first extension 51 contacts and is electrically connected to a contact of the counterpart connector fitted into the connector 1. The second extension 52 is soldered to a circuit board disposed below. This pin 50 corresponds to an example of the contact described in this invention.

[0052] Furthermore, the front housing 40 and the rear housing 60 support the pin 50 in a manner that sandwiches it from the front and rear. The configuration of the front housing 40 and the rear housing 60 in this embodiment corresponds to an example of the inner housing described in this invention.

[0053] Furthermore, the front housing 30 and the rear housing 70 sandwich the front housing 40 and the rear housing 60, covering and shielding the pin 50. In the front housing 30, six pin-shaped welding connections 31 are formed, extending downwards and welded to the circuit board. In this embodiment, the configuration of these front housings 30 and the rear housing 70 corresponds to an example of the inner housing described in this invention.

[0054] Here, the assembly consisting of the front housing 30, the front housing 40, the pin 50, the rear housing 60, and the rear housing 70 is referred to as the "sub-assembly 80". This sub-assembly 80 is inserted into the main housing 10 from the back surface side. The sub-assembly 80, inserted into the main housing 10, covers the outer housing 20, completing the process. Figure 1 Connector 1 is shown in the image.

[0055] Figure 3 These are perspective views (A) showing the connector of this embodiment along the orientation that reveals its lower surface, and rear views (B) showing the connector of this embodiment.

[0056] exist Figure 3 In (A), the second extension 52 of pin 50, a plurality of welded connections 21 of housing 20, and a plurality of (6) welded connections 31 of front housing 30 are shown. The second extension 52 of pin 50, consisting of only one pin, is used for signal transmission. The other plurality of welded connections 21 of housing 20 and the six welded connections 31 of front housing 30 are used to fix the connector 1 to the circuit board and also for electrical grounding. Specifically, for grounding, the two rear welded connections 21a of the plurality of welded connections 21 of housing 20 and the eight welded connections 31 of front housing 30 serve this function. These eight welded connections 21a, 31 are arranged to surround the second extension 52 of pin 50.

[0057] In addition, Figure 3 (B) shows a cutting tab 22, a feature of this embodiment. This cutting tab 22 corresponds to an example of the spring portion and an example of the cutting tab described in this invention. The cutting tab 22 is provided in the region of the housing 20 facing the back surface of the housing body 10, and has a forward-facing (i.e., Figure 1 , Figure 2 The direction of arrow F shown in the image is the shape of the cut. See below for reference. Figure 4 The function of the cutting slice 22 is explained at the same time.

[0058] Figure 4 The connector in this embodiment is along Figure 1 The cross-sectional view (A) and the three-dimensional cross-sectional view (B) of arrow AA are shown in the figure.

[0059] Cut slice 22 forward ( Figure 1 , Figure 2 In this embodiment, the cut (as indicated by arrow F) is made at an angle of 45° relative to the vertical direction. Furthermore, the tip 22a of the cut piece 22 impacts the rear housing 70. Figure 4 The image shows the cut piece 22 embedded in the rear housing 70, but this is to show the original shape before the design deformation. In reality, the cut piece 22 impacts the rear housing 70 and elastically deforms, pushing the rear housing 70 forward (in the direction of arrow F). The rear housing 70 is pushed by the cut piece 22 so that it abuts against the front housing 30 without creating even a tiny gap between it and the front housing 30.

[0060] Here, the cutting piece 22 abuts against the rear housing 70 at a position lower than the first extension 51 of the pin 50, which extends forward and backward. The second extension 52 of the pin 50 extends downward from the first extension 51, thus the rear housing 70 also extends significantly lower than the first extension 51, and the center of gravity of the rear housing 70 is located lower than the first extension 51. Therefore, by placing the cutting piece 22 against the rear housing 70 at a position lower than the first extension 51, the rear housing 70 is pushed against the front housing 30 in a balanced and favorable manner.

[0061] In this embodiment, the spring portion of the present invention is achieved with a simple structure by forming such a cut piece 22.

[0062] Figure 5 , Figure 6 This is a graph showing the experimental results.

[0063] Here, in Figure 5 , Figure 6 In either of them, (A) is a diagram showing the front shell 30 and the rear shell 70 in a state where the rear shell 70 collides with the front shell 30, corresponding to an embodiment of the present invention. On the other hand, in Figure 5 , Figure 6 In either of them, (B) indicates that there is no cut slice 22 (see reference). Figure 3 , Figure 4 The diagram shows the front shell 30 and the rear shell 70 with a small gap G formed between the rear shell 70 and the front shell 30. This (B) corresponds to a comparative example with respect to the present invention.

[0064] Figure 5 (C) is a graph showing the measurement results of insertion loss (dB).

[0065] Regarding insertion loss (dB), close to 0dB is good, and the embodiment with the rear housing 70 in contact with the front housing 30 is particularly good in the high-frequency region of 2.0 to 3.0 GHz compared to the non-contact comparative example.

[0066] in addition, Figure 5 (D) is a graph showing the measurement results of the voltage standing wave ratio (VSWR) on the circuit board side.

[0067] A voltage standing wave ratio (VSWR) close to 1 is good, especially in the high-frequency region, where the embodiment of (A) is good.

[0068] in addition, Figure 6 (C) is a graph showing the measurement results of the impedance on the circuit board side.

[0069] It is good that the impedance remains stable at 50 ohms, and this impedance is also good in embodiment (A).

[0070] and then, Figure 6 (D) is a graph showing the measurement results of the shielding attenuation characteristics.

[0071] Low shielding attenuation characteristics are good, and regarding these shielding attenuation characteristics, the embodiment of (A) is also good.

[0072] Thus, in this embodiment, the connector 1 has a slit 22 formed in the outer shell 20, which pushes the rear shell 70 forward and pushes it against the front shell 0. As a result, the connector 1 of this embodiment achieves better signal transmission characteristics compared to the case where the slit 22 is not present.

[0073] Furthermore, in this embodiment, the cutting piece 22 is cut at an angle of 45° relative to the vertical direction. Thus, in this embodiment, a balance is maintained between the signal transmission characteristics and the pushing force between the rear housing 70 and the front housing 30.

[0074] However, the cutting disc 22 does not necessarily need to be cut at a 45° angle. For example, the cutting disc 22 can also be cut at an angle smaller than 45° relative to the vertical direction. The cutting disc 22 abuts against the rear housing 70 at the position of the second extension 52 of the pin 50 extending vertically upwards and downwards in the height direction. When the cutting disc 22 is cut at an angle smaller than 45°, it is closer to being parallel to the second extension 52 of the pin 50 compared to the case where it is cut at a 45° angle. Therefore, correspondingly, a further improvement in signal transmission characteristics can be expected.

[0075] Alternatively, the cutting piece 22 can be cut at an angle greater than 45°. In this case, compared to the case where the cutting piece 22 is cut at a 45° angle, the elasticity can be increased, and the rear shell 70 can be pushed forcefully. Therefore, correspondingly, the rear shell 70 can be forcefully pushed against the front shell 30, making the rear shell 70 and the front shell 30 fit together more firmly.

[0076] In this embodiment, a cutting piece 22 is provided on the outer casing 20. This cutting piece 22 is a cutting piece that is obliquely cut towards the front and elastically flexes against the rear casing 70. However, instead of this cutting piece 22, a cutting piece that is provided on the rear casing 70, cut towards the rear, and elastically flexes against the outer casing 20 may also be provided. In this configuration, the rear casing 70 can also be elastically pushed against the front casing 30.

[0077] Figure 7 This is a diagram showing a modified example of the inner shell. Here, for ease of understanding, the portions of the inner shell 90 that correspond to the front and rear shells in the above-described embodiments are referred to as the front shell 30 and the rear shell 70, respectively.

[0078] Even when adopting this Figure 7 In the case of the inner shell 90 shown in the diagram, the structures of all other parts except the inner shell 90 are constructed as described in the above-described embodiment.

[0079] The inner shell 90 has a front shell 30 and a rear shell 70 that are partially interconnected. In this way, by having the inner shell 90 as a partially connected structure of the front shell 30 and the rear shell 70, the number of parts is reduced compared to the case where they are separate, which is advantageous in terms of assemblability or cost.

[0080] The contact 50 and the inner housing consisting of the front housing 40 and the rear housing 60 supporting the contact 50 need to be installed into the interior of the inner housing 90. Therefore, at the point of installation, the rear housing 70 is positioned relative to the front housing 30 as shown in the image. Figure 7 (A) is shown in the open position as indicated by the dashed line. Then, after inserting the contact 50 and the inner housing (front housing 40 and rear housing 60), the rear housing 70 is positioned as... Figure 7 The posture shown by the solid line in (A). Maintaining the rear shell 70 in the posture shown by the solid line often results in maintaining a gap G between the front shell 30 and the rear shell 70.

[0081] The rear shell 70 was cut into piece 22 (see reference). Figure 3 , Figure 4 The material is pushed forward, causing the rear shell 70 to collide with the front shell 30. Figure 7 (B) shows the inner shell 90 in the state of being pushed. Through this pushing, the front shell 30 and the rear shell 70 are electrically integrated, achieving the following... Figure 5 , Figure 6 It demonstrates such excellent signal transmission characteristics.

[0082] Symbol Explanation

[0083] 1 Connector

[0084] 10. Outer shell

[0085] 11. Capacity

[0086] 20. Outer shell

[0087] 21, 21a Welded joint

[0088] 22 slices

[0089] 22a The tip of the slice

[0090] 30 Front Shell

[0091] 31 Welded joint

[0092] 40 Front housing

[0093] 50 sales

[0094] 51 First extension

[0095] 52 Second Extension

[0096] 60 rear shell

[0097] 70 back cover

[0098] 80 sub-components

[0099] 90 Inner shell.

Claims

1. A connector, characterized in that, have: The housing has receiving spaces with openings on a front surface facing the other connector and a back surface facing away from the other connector; An outer casing that covers the housing in such a manner that it includes the back surface of the housing; The contact element housed within the housing space enables electrical connection with the other connector; as well as The inner shell, disposed within the receiving space, covers the contact element. Between the outer shell and the inner shell, there is a spring portion that elastically pushes the inner shell forward. It has an inner housing disposed in the receiving space and supporting the contact element. The inner shell sandwiches the inner shell between itself and covers the contact element. The inner housing includes a front housing and a rear housing, which support the contact element in a manner that clamps it from the front and rear.

2. The connector according to claim 1, characterized in that, The inner shell has a front shell and a rear shell that are separated from each other or partially connected and cover the contact members in a manner that clamps them from the front and rear.

3. The connector according to claim 1 or 2, characterized in that, The spring portion is a cut piece disposed on the outer shell that is obliquely cut in front and abuts against the inner shell, elastically flexing.

4. The connector according to claim 3, characterized in that, The contact has a first extension that extends forward and backward and provides conduction with the other connector, and a second extension that extends downward from the rear end of the first extension and bends to connect to the circuit board. The cut piece abuts against the rear shell at a position lower than the first extension in the vertical direction.

5. The connector according to claim 4, characterized in that, The slit is cut at an angle of 45° relative to the vertical direction.

6. The connector according to claim 4, characterized in that, The slit is cut at an angle smaller than 45° relative to the vertical direction.

7. The connector according to claim 4, characterized in that, The slit is cut at an angle greater than 45° relative to the vertical direction.

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