JP2902654B2 - Electrical connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electrical connector in which a detachable contact is arranged on an outer peripheral side to facilitate repair and the like.

2. Description of the Related Art In general, in an electric device, a signal or driving power can be provided through an electric connector.

As the electrical connector, those having a structure in which a contact is attached to an insulator are widely used. This contact may be one that is not detachable from the insulator or one that is detachable from the insulator. As the non-detachable type, there is a type in which an insulator and a contact are integrally formed as disclosed in Japanese Utility Model Laid-Open No. 59-77507. In addition, there are those which are fixed to the insulator in a watertight manner to ensure watertightness, and those which are fixed so that the connector can be reduced in size with a simple structure by eliminating the attaching / detaching mechanism. These are to be soldered to the contacts when wiring the wires.

On the other hand, as a detachable structure, for example, when connecting a contact to an electric wire, a type is performed by crimping (when crimping is not possible if the contact is fixed to the insulator)
This is effective in the case of a shield contact. This is because the electric wire has a double structure of the inner conductor and the outer conductor,
This is because, in order to connect it to a coaxial contact having the same double structure, crimping can be performed faster than soldering, and the work is easier.

On the other hand, in recent years, electronic endoscopes with a built-in CCD at the tip of the insertion section are becoming widely used, but the electric wires that electrically connect the CCD and a video processor with a signal processing system , Various signals such as a DC signal, an AC signal, and a high-frequency signal are transmitted. Naturally, high-frequency components affect other signals as noise, so shielded wires are used for high-frequency signal wires. Therefore, a single wire or a shielded wire is mixed in the wire connecting the CCD and the video processor. This means that a single contact and a shield contact are similarly mixed in one insulator for the electrical connector provided between the CCD and the video processor.

In an electrical connector having such mixed contacts, it takes a long time to remove an electric wire with a non-removably fixed contact, but it is easy to remove a detachably mounted contact from an insulator. is there.

On the other hand, the inner conductor of the shield wire is thin and the inner contact of the shield contact is rotatable with respect to the outer contact, so that the inner conductor is easily disconnected from the inner conductor. That is, there is a situation that the shield contact is easily broken and the frequency of repair is higher than other single contacts.

[Problems to be Solved by the Invention] Conventionally, a contact layout that can effectively cope with the above situation has not been considered.

The present invention has been made in view of the above points, and has as its object to provide an electrical connector that can be easily repaired.

[Means for Solving Problems and Action] In the present invention, a layout is adopted in which the detachable contacts are arranged on the outer peripheral side of the non-removable contacts with respect to the insulator, so that the contacts that often need to be repaired are located on the outer peripheral side. So it is easy to repair.

EXAMPLES Hereinafter, the present invention will be described specifically with reference to the drawings.

1 to 5 relate to a first embodiment of the present invention, and FIG. 1 is a sectional view showing a structure of an electric connector according to the first embodiment.
FIG. 2 is a block diagram showing the overall configuration of the video endoscope apparatus having the first embodiment, FIG. 3 is a front view of FIG. 1, FIG. 4 is a cross-sectional view showing the structure of a shield contact portion, FIG. The figure is an explanatory view showing a state where the shield wire fixing pipe is deformed by caulking.

As shown in FIG. 2, a video scope apparatus 1 having the first embodiment includes a video scope 2 and the video scope 2.
, A video processor 6 including a drive circuit 4 for applying a drive signal to the video scope 2 and a signal processing circuit 5 for performing signal processing, and a video signal output from the video processor 6. And a color monitor 7 for displaying

The video scope 2 has an elongated insertion section 8, a light guide 12 is inserted into the insertion section 8 and a universal cord 11 extending from the operation section 9, and a distal end of the universal cord 11 has a scope connector. By connecting the light source connector 14 of the scope connector 13 to the connector receiver 15 of the light source device 3, the white light of the light source lamp 16 is condensed by the condenser lens 17 and the incident end face of the light guide 12 is provided. Is irradiated. This light guide 12
The illumination light transmitted in the above is irradiated from the emission end face toward the subject in front. The illuminated subject is moved by the CCD 1 placed on the focal plane by the objective lens 18 attached to the tip.
An image is formed on the imaging surface 9. Note that a mosaic filter 21 is attached to the imaging surface of the CCD 19, and separates the colors into, for example, R, G, and B.

The CCD 19 is connected to one end of a signal wire 22. The signal wire 22 is inserted through the insertion portion 8 and the universal cord 11, and reaches the scope-side electrical connector 23 of the first embodiment formed on the scope connector 13. . The scope-side electrical connector 23 can be connected to a VP-side electrical connector receiver 25 attached to one side of the connection cord 24, and the VP-side electrical connector 26 attached to the other side of the connection cord 24 is connected to the video processor 6.
The connector 27 can be connected to the electrical connector receiver 27.

The electrical connector receiver 25 of the connection cord 24 and the electrical connector 26 are respectively the electrical connector 23 of the scope connector 13,
By connecting to the electrical connector receptacle 27 of the video processor 6, a CCD drive signal from the drive circuit 4 is applied to the CCD 19, and a signal read from the CCD 19 is input to the signal processing circuit 5. The signal processing circuit 5 processes the signal and the color monitor 7 displays the subject image in color.

The electrical connector receiver 25 and the electrical connector 26 attached to each end of the connection cord 24 are attached to mounting rings 28 and 29, respectively.
The electrical connector 23 and the electrical connector receiver 27 of the first embodiment
It is removable.

FIG. 1 shows the structure of the electrical connector 23 of the first embodiment.

The flange 32 of the cylindrical base 31 is fixed to the scope connector main body 34 by screws 33. A cylindrical insulating frame 35 is fitted into the base 31, and a guide member 36 is fitted inside the insulating frame 35.

On the inner circumference from the rear end of the guide member 36, a locking projection 37 is provided.
A cover member 38, an insulator 39 covered by the cover member 38, and a substrate 41 are superimposed on the protrusion 37, and a guide member 36 is provided from a rear portion of the substrate 41 by a substrate stopper 42.
Is fixedly screwed to the rear end. Guide member for screw fixing
36 is fixed while being positioned by the positioning pins 43 engaged with the base 31 and the insulating frame 35. In the case of fixing with the board stopper 42, a watertight packing 44 is interposed between the outer peripheral portion of the board stopper 42 and the inner periphery of the rear end of the base 31. Is done.

A cylindrical shield frame 45 is screwed to the rear end of the substrate stopper 42. At the rear end of the shield frame 45, a shield member 46 provided with an opening through which the signal wires 22 pass is fixed with screws 47. The signal wire 22 is also sandwiched between the cushion members 48, 48 at the shield member 46, and is further fixed with screws 51 with the cable stopper plate 49 superposed.

By the way, a plurality of holes are formed in the insulator 39, and the single pin contacts 52, 52,.
It is fixed irremovably by adhesive. A shield contact 54 is detachably attached to the insulator 39. Single pin contact attached to this insulator 39
The arrangement state of 52, post 53, and shield contact 54 is as shown in FIG.

In other words, post 53 in the center and single pin contact 5 around it
Are arranged, and shield contacts 54, 54,... Are arranged on the outer peripheral side of the single pin contacts 52, 52,. A single wire 55 forming the signal wire 22 is connected and fixed to the rear end of each of the single pin contacts 52 by soldering. The shield (coaxial) wire 56 is connected to the shield contact 54 fitted into the insulator 39.

In FIG. 3, a ventilation port 61 is provided on the outer peripheral side opposite to the shield contacts 54, 54,...
The sheet press ring 63 is fixed to the insulator 39 by a ventilation cap 64. That is, the vent 61 does not allow water to pass, but allows air to pass. Thus, a waterproof cap (not shown) is attached to the electric connector 23, air is sent into a vent provided on the waterproof cap, and the inside of the video scope 2 is pressurized to check for water leakage. In FIG. 3, P0 is a vent 61, outermost contacts P1, P2, P11, and P12 are single pin contacts, and P3 to P10 are shield contacts 54. Also, P
13 to P30 single pin contacts 52 are arranged, and the central P31 is a post.
53.

The single pin contacts 52, 52,... And the posts 53 are soldered to land portions of the substrate 41.

When a single wire 55 is connected to each single pin contact 52, the wiring work can be easily performed by starting before the shield contact 52 attached to the outer peripheral side is fitted.

The base 31 is provided with a base pin 65 protruding from the base 31 to position the bearing at the time of mounting. The guide member 36 is provided with a guide groove 36a as shown in FIG.

Incidentally, the structure of the shield contact 53 is shown in FIG.

An outer conductor 67 is provided around the outer periphery of the cylindrical insulating material 66, and the outer conductor 67
A support member 68 is irremovably fixed to the outer periphery of the support member 68. An inner conductor 69 is fitted inside the insulating material 66, a support sleeve 71 is housed inside the outer conductor 67 behind the inner conductor 69, and a shield wire fixing pipe 72 is covered over the outer conductor 67. The inner conductor 69, the support sleeve 71, and the (shielded) fixing pipe 72 are separated before mounting.

Thus, the coaxial wire 56 in the signal wire 22 is preformed, the inner conductor 56b is exposed from the inner sheath 56a, and the tip is inserted into the recess of the inner conductor 69 and soldered. Next, the inner conductor 69 is pushed into the insulating material 66 by using the support sleeve 71. This inner conductor 69 can be attached to the insulating material 66,
You cannot leave.

Next, the outer conductor 56d is exposed from the outer sheath 56c, and the outer conductor 56 (d) is arranged with the outer conductor 67 on the outer periphery of the rear end. And caulking as shown in FIGS. 5 (a) and 5 (b). This caulking may be performed once, but the range that can be caulked at one time is 50% to 90% of the entire circumference. Therefore, in this embodiment, in order to completely caulk, the two locations A and B are caulked in the axial direction, and the caulking portion is caulked by changing its orientation as shown in FIGS. 5 (a) and 5 (b). I have. It is not always necessary to perform caulking as shown in FIG.

As described above, the shield wire 56 is connected to the shield contact 54 in advance, and the mounting on the insulator 39 is performed first by using the single wire 55.
Is performed after wiring to the single pin contact 52. That is, after connecting the single wire 55 to the single pin contact 52, the shield contact 54 is fitted into the insulator 39.

In this case, a gill-shaped elastic member 73 is provided on the outer conductor 67. When the shield contact 54 is inserted into the mounting hole of the insulator 39, the elastic member 73 is depressed when passing through the narrow hole of the mounting hole. However, after passing through, it is prevented from spreading out by elastic force. Note that a stopper 74 serving as a stopper is provided at the rear end of the support member 68.

The inner conductor 56b is very thin, and the inner conductor 69 can rotate with respect to the insulating material 66.Therefore, by repeatedly attaching and detaching the electrical connector 23, the inner conductor 56b may be determined and the frequency of failure is high. Since the shield contact 54 is laid out on the outer peripheral side of the insulator 39, repair is easy.

The electrical connector 23 of the first embodiment can be applied to the electrical connector 26 connected to the video processor 6 shown in FIG.

 The following effects are obtained in addition to the effects of the first embodiment.

When repairing the inside contact (failure due to disconnection or the like), the outside wiring must be disconnected. However, the easy-to-remove contact (for each contact) is provided on the outer periphery, so the repair time can be shortened.

The coaxial shield contact 54 is mainly used for a cable for transmitting a high-frequency component. By arranging the noise source on the outermost periphery, mutual influence can be minimized.

In the first embodiment, the electrical connector 23 (or 26) and the electrical connector receiver to which the electrical connector 23 (or 26) is connected.
Although applied to one of the 25 (or 27), it can also be applied to the other, that is, the electrical connector receiver 25 (or 27). In addition, the present invention can be applied to such a pair.

FIG. 6 shows a videoscope device 81 to which the first embodiment of the present invention is applied.

In this embodiment, a television camera external scope 85 in which a television camera 84 is attached to an eyepiece 83 of a fiber scope 82 is used instead of the video scope 2 of the first embodiment.

The fiber scope 82 is different from the video scope 2 shown in FIG. 2 in that an incident end face of an image guide 80 is disposed on a focal plane of the objective lens 18 and an optical image is formed on an emission end face on the eyepiece section 83 side by the image guide 80. Transmitted. An eyepiece 86 is provided opposite to the exit end face of the image guide 80 of the eyepiece 83, so that an optical image transmitted through the eyepiece 86 can be visually observed.

When a television camera 84 is attached to the eyepiece 83, a CCD 88 is formed by an imaging lens 87 facing the eyepiece 86.
To form an optical image. A mosaic color filter 89 is mounted on the imaging surface of the CCD 88.

A light guide cable 91 extends from the operation unit 9 of the fiber scope 82, and the distal end of the light guide cable 91 connects the light source connector 92 to the light source device 3 to supply illumination light.

On the other hand, a signal wire 94 is connected to the CCD 88 of the television camera 84, the signal wire 94 is inserted through a camera cord 95, and reaches a camera-side electrical connector 96 attached to the end of the camera cord 95. The camera-side electrical connector 96 can be connected to the electrical connector receptacle 27 of the video processor 6, and has the same configuration as that of the first embodiment.

The electrical connector 96 is attached by a mounting ring 97.
Can be mounted on the VP side electrical connector receiver 27.

Other configurations are the same as those of the first embodiment,
The same reference numerals are given.

FIG. 7 shows an imaging apparatus 10 to which the first embodiment of the present invention is applied.
Indicates 1.

A television camera 103 mounted on a tripod 102 includes an objective lens 104 and a CCD 1 disposed on a focal plane of the objective lens 104.
05 and the signal wire 106 connected to the CCD 105
Are inserted through the camera code 107. Note that a mosaic filter 108 is attached to the CCD 105.

A camera-side electric connector 109 having the same structure as that of the first embodiment is attached to the end of the camera cord 107 so that the camera cord 107 can be connected to the electric connector receiver 27 of the video processor 6.

FIG. 8 shows an electrical connector 110 according to a second embodiment of the present invention.

This electrical connector 110 is the electrical connector 2 of the first embodiment.
3 is a waterproof structure.

The single pin contact 52, the post 53, and the ventilation cap 64 are soldered to the post portions 111a, 111b, 111c (see FIG. 10) of the substrate 41 (shown by reference numeral 115 in FIG. 8) to have a waterproof structure. After arranging the shield coaxial wire 56 on the shield wire 54 and wiring the single wire to the single pin contact 52, the shield contact 54 is connected to the insulator 39.
Fit it. As shown in FIG. 9, the shield contact 54 first flows a low-viscosity silicone adhesive 112 through the opening of the fixed pipe 72, exposes the inner conductor 56b,
It is poured into the space between 6a, the internal conductor 69 and the insulating material 66 to be solidified.
Next, a silicone-based adhesive 113 having a high viscosity is poured from the opening of the fixed pipe 72, and is hardened near the opening of the fixed pipe 72. The former waterproofs the inner conductor 56b and the inner covering 56a and substantially fixes the inner conductor 69 and the insulating material 66 so that the inner conductor cannot rotate.Therefore, fixing the inner conductor 69 may break the inner conductor 56b. Has an effect that can be effectively prevented.

The latter adhesive 113 waterproofs the fixed pipe 72 and the outer coating 56c, waterproofs the fixed pipe 72 and the inner conductor 56b, and also reinforces the shield coaxial cable 56 when it is pulled.

As shown in FIG. 8, a high-viscosity silicon-based adhesive 113 is poured into the gap between the shield contact 54 and the substrate 41 and solidified.
Waterproofing is also performed between the substrate stopper 42 and the substrate 41 with a silicon adhesive 113 having high viscosity. The space between the base 31 and the board stopper 42 is waterproofed by a packing 43.

In this manner, the moisture entering from the opening of the base 31 is waterproofed by the line of the base 31, the substrate stopper 42 and the substrate 41.

Partially soldered between the shield contact 54 and the substrate 41 (reference numeral 11).
4), the adhesive 113 may be prevented from peeling off in the axial movement of the shield contact 54. However, in this case, the operation of filling the adhesive in the shield contact 54 may be performed after this soldering. In this case, the substrate
The portion where the shield contact 54 of the 41 is soldered can be formed by a partial land 111d provided in the outer peripheral direction as shown in FIG. In this way, soldering can be performed without increasing the space between the adjacent shield contacts 54, 54.

In addition, the entire area between the shield contact 54 and the board 41 may be soldered to omit the adhesive at this portion. It is necessary to increase the distance between the contacts 54, 54, and the size of the connector itself becomes large, so that it becomes difficult to perform a soldering operation at the time of removal.

At the time of repair, the adhesive 113 flowing between the shield contact 54 and the substrate 41 is removed, and the shield contact 54 is pulled out with a jig while melting the solder. The jig has a pipe shape, the outer circumference of which is smaller than the widened portion of the shield contact mounting hole of the insulator 39, and the inner diameter of which is larger than the outer diameter of the support member 68.
Insert from the left side of the figure, work to close the elastic member 73,
The shield contact 54 can be pulled out to the right.

According to the second embodiment, when the user accidentally submerges the scope without attaching the waterproof cap, it is possible to prevent water from entering the scope although it is not good for the electrical connector 110.

By the way, when the scope 2 or the television camera 84 shown in FIG. 2 or FIG.
The waterproof cap 121 as shown in FIG.
Alternatively, water can be prevented from entering these electrical connectors 23 and 96 by attaching them to 96 or both. For example, the base 31 of the electrical connector 23 is provided with a base pin 65 as shown in FIG. 1 or FIG. This connector receiver 25 is engaged with the bayonet groove provided on the
It is fixed to 23. Similarly, the electrical connector 96 is provided with a rotatable mounting ring 97 on the connector 96 as shown in FIG. 13, and a bayonet groove 122 mounted on the mounting ring 97 is provided on the outer periphery of the VP-side electrical connector receiver 27. Engage the provided base pins and connect the electrical connector 96
And the electrical connector receiver 27 are fixed. Thus, the electrical connector 23 has the base pin 65 and the electrical connector 96
Are provided with mounting rings 97 each having a bayonet groove 122. The waterproof cap 121 is attached to both types of bases (for example, 31).
A bayonet groove 123 and a mounting pin 124 are provided in the mounting portion.

FIG. 12 shows a view in which the waterproof cap 121 is attached to the electric connector 23 of the video scope 2. As shown in FIG. 12, the base pin 65 is engaged with the bayonet groove 123 and fixed. The packing 125 built into the waterproof cap 121 has
As shown in FIG. 12, a watertight portion 125a and an elastic body 125b are provided. The elastic pin 125b is provided with a cap pin 65 in a bayonet groove.
When the user is in the locking portion 123a of the 123 (see FIG. 11), the repelling force presses the base pin 65 against the locking portion 123a, and the waterproof cap
As well as making the 121 itself difficult to rotate, it also becomes a click when mounted.

FIG. 13 shows a state in which the waterproof cap 121 is attached to the electric connector 96. As can be seen from this figure, the mounting pin enters the bayonet groove 122 of the mounting ring 97 and is fixed by its locking part.

When the waterproof cap 121 is attached to the electrical connector 23, the inner surface of the waterproof cap 121 and the outer periphery of the electrical connector 23 are fitted. On the other hand, when the waterproof cap 121 is attached to the electrical connector 96, the outer surface of the waterproof cap 121 is attached to the mounting ring 97.
Are fitted to the inner surface of

Thus, the waterproof cap 121 is attached to the video scope 2
In addition, since it can be used for both the TV camera 84 and the TV camera 84, erroneous assembly and complexity of the user can be eliminated.

[Effects of the Invention] As described above, according to the present invention, the detachable contacts are arranged on the outer peripheral side of the contacts that are non-detachably attached to the insulator. Repair of the detachable contact that is easy to perform can be easily performed.

[Brief description of the drawings]

1 to 5 relate to a first embodiment of the present invention.
FIG. 1 is a cross-sectional view showing the structure of the electrical connector of the first embodiment, FIG. 2 is an overall configuration diagram of a videoscope device provided with the first embodiment, and FIG. FIG. 4 is a front view showing the arrangement, FIG. 4 is a sectional view showing the structure of the shield contact,
FIG. 5 is an explanatory view showing a state in which a fixing pipe provided outside the external conductor is caulked, FIG. 6 is an overall configuration diagram of a video scope apparatus to which the first embodiment is applied, and FIG. FIGS. 8 to 10 relate to a second embodiment of the present invention, and FIG. 8 is a cross-sectional view of an electric connector of the second embodiment, and FIGS. FIG. 10 is a sectional view showing the structure of the shield contact, FIG. 10 is an enlarged rear view showing the arrangement of the contact as viewed from the substrate side in FIG. 8, and FIG. 11 shows the structure of the waterproof cap that can be attached to the first embodiment. Cross-sectional views shown in FIG. 12 and FIG.
FIG. 13 is a cross-sectional view showing a state where the waterproof cap of FIG. 11 is attached to an electric connector of a video scope and an electric connector of a television camera, respectively. 1 Video scope device 2 Video scope 3, Light source device 4 Video processor 5, Color monitor 22 Signal wire 23, 26 Electrical connector 24 Connection code 25, 27 Electrical connector receptacle 28,29 …… Mounting ring

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-138854 (JP, A) JP-A-61-248374 (JP, A) JP-A-2-114474 (JP, A) Japanese Utility Model No. 57- 199977 (JP, U) JP-A 2-126372 (JP, U) JP-A 62-200267 (JP, U) JP-A 52-15793 (JP, U) JP-A 55-87503 (JP, U) J. 50-50544 (JP, Y1) (58) Field surveyed (Int. Cl. ⁶ , DB name) H01R 13/46 H01R 23/26 H01R 23/02

Claims (1)

(57) [Claims] 1. An electrical connector comprising an insulator, a non-removable contact on the insulator, and a detachable contact on the insulator, wherein the detachable contact is disposed on an outer peripheral side of the non-removable contact. An electrical connector, characterized in that: