JP2518935Y2 - Electrical connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an electrical connector suitable for repair and the like.

[Prior Art] Since a camera-separated electronic camera using a solid-state image sensor such as a CCD as an image pickup means is a separate body from a video processor, both are naturally provided with an electrical connector for electrical connection. .

Signals sent from the video processor to the CCD include power supply signals for power supply and CCD drive signals, and output signals sent from the CCD to the video processor include direct current and high frequency, and signals of various frequencies are mixed. are doing.

As is well known, high-frequency components can act as noise sources and adversely affect other signals, so shielded cables are used for cables. For example, as in Japanese Patent Application No. 62-200293, shielded contacts are used even in electrical connectors. It is preferable to use.

However, in order to make the shield contact compact and have good workability, for example, Japanese Patent Application No. 63-284
It is often used for cabling as in No. 109.

In the contact using the caulked wiring, if the wiring is removed for repair or the like, it cannot be reused and will be essentially thrown away.

The electrical connector generally becomes expensive, though it depends on the number of contacts, and therefore, it is desirable that only the contacts can be replaced at the time of repair or the like. Therefore, in Japanese Patent Application No. 63-284109, the shield contact is detachable from the electric connector.

In order to wire the contacts in the electric connector, a printed circuit board may be provided in the electric connector and the contacts may be soldered thereto.

[Problems to be solved by the invention] Since the durability of attachment / detachment of the shield contact is significantly lower than that of the single contact, it is desirable that the shield contact can be repaired many times. It is not good to repeatedly repair the shield contact in this way, because the land portion of the soldered portion is repeatedly subjected to thermal stress, and the pattern peels off. Therefore, the actual development Sho 61-201365 or the actual development Sho 54-33
It is effective to reinforce the land by providing another small through hole in the land of the through hole or screw hole like No.954.

However, in consideration of repairability, if the land of the soldering portion of the contact is provided on the entire circumference, the soldered solder cannot be removed, and repair may not be performed in some cases. Due to the compactness of the electrical connector, the shorter the contact separation, the more difficult the repair.

The present invention has been made in view of the above points, and an object thereof is to provide an electrical connector that is resistant to repeated repairs and is easy to repair.

[Means and Actions for Solving Problems] In the present invention, in an electrical connector having a detachable contact, a partial land is provided in a hole of a substrate through which the contact is inserted, and a through hole is formed in the partial land. The soldering can be easily removed and repaired in a shorter time than in the case of all-round land, and the structure with through holes can prevent peeling even during repeated repairs, thus improving durability. I have it.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 to 4 relate to a first embodiment of the present invention, FIG. 1 shows the vicinity of a shield contact portion to which a shield wire is connected, and FIG. 2 shows an imaging system having the first embodiment. FIG. 3 shows the structure of the electrical connector of the first embodiment,
FIG. 4 shows the substrate viewed from the direction A in FIG. 3 with the contacts removed.

As shown in FIG. 2, the imaging system 1 including the first embodiment is a video processor including an electronic camera 2 and a socket 5 to which a plug 4 of a signal cable 3 extending from the electronic camera 2 is connected. 6 and this video processor 6
And a peripheral device 8 such as a TVR for recording the video signal and the like, and a monitor 7 for displaying a standard video signal generated by signal processing.

The electronic camera 2 has a CCD 10 on the focal plane of the imaging lens 9.
Are arranged to photoelectrically convert the formed optical image. This CC
A color mosaic filter 11 is attached to the light receiving surface of D10, and color separation is performed for each pixel. The CCD 10 is read from the CCD 10 by applying a drive signal from the (CCD) drive circuit 12 in the video processor 6, and the read video signal is amplified by the amplifier 13.
The signal amplified by the amplifier 13 is transmitted by the signal cable 3, and the plug 4 constituting the electrical connector of the first embodiment,
It is input to the signal processing circuit 14 via the socket 5. The signal processing circuit 14 performs signal processing to generate a standard video signal.

This standard video signal is transmitted to the color monitor 7 via the socket 15, the plug 16 and the cable 17, and the subject image captured by the electronic camera 2 is displayed in color.

Also, it can be transmitted to the peripheral device 8 through the socket 18, the plug 19 and the cable 20, and the video signal can be recorded.

The signal cable 3 is used for transmitting drive signals, etc.
In addition to the CCD output signal transmission line, it includes a power supply line for the power supply 21 and other signal lines.

The signals transmitted by the signal cable 3 are a mixture of direct current, low frequency signals and high frequency signals. In order to prevent mutual interference between signals, a shield wire 3b is used for transmitting a high-frequency signal that becomes a noise source as shown in FIG. 3, and a single wire 3a is used for transmitting other signals.

Therefore, as shown in FIG. 3, the shield contacts 25, 26 and the single contacts 27, 28 are also used as the contacts in the plug 4 and the socket 5 constituting the electric connector 24 of the first embodiment.

The single line point 27 in the plug 4 is the insulator 31, 32.
And the shield contact 25 is inserted into the insulator 31. These single contacts 27 and shield contacts 25 are
It is wired to the board 33 by soldering (shown as so in FIG. 3), and in that state, it is screwed and fixed to the insulator receiver 34 by the board stopper 35.

The insulator receiver 34 is fixed to the base 37 via an insulating member 36.

Each of the single wires 3a is wired to the single contact 27 by soldering, and the shield wire 3b is wired to the shield contact 25. In order to prevent noise from flowing out from these wiring portions, it is surrounded by a frame-shaped shield member 38 (some shield wires 3b
May be wired to a single line point. ).

An external member 39 is attached to the base 37,
A guide member 41 and an exterior member 42, which are integrally fixed to the outer periphery, are rotatably provided.

The guide member 41 is provided with a cam groove, and when the plug 4 is attached to or detached from the socket 5, the cap pin 44 of the socket 5 is pulled in or projected. still,
Although not shown, the guide member 41 and the exterior member 42 are provided with a click mechanism for giving a click feeling when the plug 4 is attached.

On the other hand, in the socket 5, the single contact 28 is sandwiched between the insulators 45 and 46, and the shield contact 26 is inserted into the insulator 45.

The insulators 45 and 46 are insulator receivers 47.
It is screwed and fixed by an insulator stopper 48. The insulator receiver 47 is provided with a pin 49 and a nut 50, and the pin 49 serves as a guide for the insulator receiver 34 when the plug 4 is mounted (the insulator receiver 34 is provided with a guide groove). The nut 50 positions the insulator 46 at an angle with respect to the insulator receiver 47. In other words, the pin 49 and the nut 50 allow the insulators 31 and 32 on the plug 4 side and the socket 5
The side insulators 45 and 46 are positioned at an angle.

The insulator receiver 47 has an insulating base 51,
It is fixed by screws 52, and the single wire 3a and the shield wire 3b are wired inside this. A base 53 is further fixed to the base 51 with screws 54, the base 53 projects from the panel 55, and the base pin 44 described above projects on a part of the outer periphery. In FIG. 3, the center contact is the post 5b. Next, the structure of the shield contacts 25 and 26 is shown in FIG.

The shield contact 25 consists of the inner contact 25a and the insulating material 2
5b, an external contact 25c on the outer circumference thereof, a retaining biasing member 25d and a caulking ring 25e provided on the outer circumference.

The insulating material 25b, the external contact 25c, and the biasing member 25d are integrally formed in advance, while the internal contact 25a and the caulking ring 25e are separate bodies.

Then, when wiring the shielded wire 3b, the shielded wire 3b is preformed to an appropriate length in advance, and the inner conductor 3ba exposed from the inner coating 3bb is put into the hole portion of the inner contact 25a and soldered, Insulation material 25
Push it into b. Then, with the inner coating 3bb slackened, the outer conductor 3bc exposed from the outer coating 3bd is sandwiched between the outer contact 25c and the caulking ring 25e, and the caulking ring 25e is caulked and fixed.

The internal contact 25a is formed with a concave portion in the vicinity of the central portion in the longitudinal direction in a stepped state, and is fitted to the convex portion of the inner peripheral surface of the insulating material 25b so that it cannot be removed once inserted.

Further, the biasing member 25d provided on the outer periphery of the external contact 25c is
A part is an elastic member protruding in a gill shape, the shield contact 25 is inserted into the insulator 31 from the substrate 33 side, and the biasing member 25d spreads at the step of the insulator 31,
It is designed so that it can be done without fail.

With this wiring method, the shield wire 3b is connected to the shield contact 25.
After the wiring, the shield contact 25 is inserted into the insulator 31 and fixed.

When repairing, use the shield wire 3b at the left end of the external contact 25c.
Then, the shield contact 25 is pushed inward by the pipe-shaped removing jig to push the biasing member 25d inward, and the shield contact 25 is placed on the substrate 3
Do by pulling to the 3 side.

On the other hand, the shield contact 26 on the socket side has substantially the same structure as the shield contact 25 on the plug side, but partly differs.

That is, the shield contact 26 includes the inner contact 26a, the insulating material 26b,
With the external contact 26c, the biasing member 26d, and the caulking ring 26e,
It is composed of an insulating material 26f inside the external contact 26c.

The inner conductor 3ba of the shielded wire 3b is connected to the inner contact 2
It is fixed to 6a by caulking, not by soldering.

Also on this socket side, the shield wire 3b is wired to the shield contact 26, and then the shield contact 26 is attached to the insulator 45.

By the way, as shown in FIG. 4, the board 33 is provided with through holes 62 having lands 61 on the front and back sides for single contact attachment, and also with a shield contact attachment (contact) hole 63. .

For the shield contact attachment, each hole 63 which is not a through hole is provided with a partial land 64 in a part of this hole periphery, and a small through hole 65 for reinforcing the partial land 64 in a part of the partial land 64, 65 is provided.

A circular land 66 is provided on the back surface side of each through hole 65. Note that FIG. 1 also shows the holes 63, the partial lands 64, the through holes 65, and the partial lands 66.

On the board 33, in order to enhance the shield effect of the shield contact 25, the external metal of the shield contact 25 can be connected to the ground, and on this board 33, the partial land 64 and the through hole 62 for mounting the ground single contact are provided. The wiring pattern 67 is connected to the land 61 ′.

Then, the shield contact 25 is soldered and fixed to the partial land 64 as shown in FIG.

Since this soldering is performed only on the partial lands 64, the solder can be removed more easily than when soldering is performed on the entire circumference during repair. Also, this hole
Since 63 is not a through hole, it is possible to prevent solder from entering the inside as in the case of a through hole.

Further, since the through holes 65 for reinforcement are provided in the partial lands 64, the partial lands 64 are prevented from peeling off from the substrate 33 even when the soldering is repeatedly removed.

The operation of the first embodiment thus constructed will be described below.

As shown in FIG. 1, the shield contact 25 has a complicated structure and is much more durable than other single contacts, and therefore often requires repair.

As described above, since the external metal of the shield contact 25 is soldered to the partial land 64 of the substrate 33 in order to drop it to the ground, the solder that has been soldered must be removed at the time of repair. Since the hole 63 is not a through hole, the solder does not enter the hole during soldering, so that the removal can be easily performed. Also, partial land 64
Since it is not the entire circumference, the time for removing the solder can be shortened and it can be removed with less heat stress. Further, even if the repair is repeated, the through hole 65 provided in the partial land 64 can improve the resistance to peeling of the partial land 64.

FIG. 5 shows the vicinity of the hole portion for the shield contact in the second embodiment of the present invention.

In the second embodiment, as in the first embodiment, the partial land 74 is provided in the shield contact hole 73, and each partial land 74 has two holes.
In the case where the two through holes 75, 75 are provided, the reinforcing wire 76 is passed through the two through holes 75, 75 and folded back on the back side. The land 77 on the back side is both through holes 75,7.
It is a pattern-shaped land that connects the five, and the wire 76 folded back at the land 77 portion is fixed by soldering. The cross section taken along the line BB 'of FIG.
Shown in the figure.

With the structure of the second embodiment, the resistance of the partial land 74 to peeling can be improved as compared with the first embodiment.

In each of the above-described embodiments, the case where the shield contact is made detachable is described, but the shield contact having two or more cores is also applicable.

[Advantages of the Invention] As described above, according to the present invention, in an electrical connector having a structure in which detachable contacts are electrically connected to a board by soldering, a partial land is provided in a hole of the board, and
Since the through holes are provided in the partial lands, the solder can be easily removed at the time of repair, and the resistance to peeling of the lands at the time of removing the solder can be improved.

[Brief description of drawings]

1 to 4 relate to a first embodiment of the present invention.
FIG. 4 is a cross-sectional view showing the structure of the shield contact in the first embodiment, FIG. 2 is a block diagram of the image pickup system including the first embodiment, and FIG. 3 is a cross-sectional view showing the structure of the first embodiment. FIG. 5 is a front view showing the substrate viewed from the direction A in FIG. 3, FIG. 5 (a) is a front view showing a part of the substrate in the second embodiment of the present invention, and FIG. 5 (b) is the same diagram. FIG. 6A is a rear view and FIG. 6 is a sectional view taken along the line BB ′ of FIG. 1 ... Imaging system, 2 ... Electronic camera, 3 ... Signal cable, 3b ... Shielded wire, 4 ... Plug, 5 ... Socket, 6 ... Video processor, 10 ... CCD, 24 ... Electrical connector, 25 ... Shield contact, 26 …… Shield contact 27 …… Single contact, 28 …… Single contact 31,32 …… Insulator 33 …… Board, 64 …… Partial land 65 …… Through hole, 66 …… Circular land

Claims (1)

(57) [Scope of utility model registration request] 1. An electrical connector comprising an insulator to which a detachable contact is attached and a wiring board which is arranged to face the insulator and has a hole through which the contact penetrates. A partial land is provided in the hole of the board. And an through hole is provided in the partial land.