JPH07326427A - Electric connector - Google Patents

Abstract

PURPOSE:To provide an electric connector which can prevent a solid image- sensing device from being damaged by an attaching or removing operation. CONSTITUTION:A signal connector 130 connected to a solid-state image sensing device has a single-pin contact 137 and is freely releasably connected to the single-pin contact 138 of a signal connector receiver 131 connected to a video processor. The single-pin contacts 1371, 137m (only one is shown in Figure 9) of the single-pin contact 137 which are connected respectively to power sources VDD and GND are made longer than the other contact pins, are preferentially connected to a single pin 138 during connection to the signal connector receiver 131 and are the last to be removed during disconnection, so as to prevent damage to the solid-state image sensing device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric connector which is connected to a solid-state image pickup device to prevent damage.

[0002]

2. Description of the Related Art Recently, an image pickup device using a solid-state image pickup device (hereinafter abbreviated as SID) such as a charge coupled device (abbreviated as CCD) as an image pickup means has been put into practical use. This image pickup apparatus has a built-in SID in the image pickup unit, once converts an optical image into an electric signal, inputs the converted electric signal into a video processor (hereinafter abbreviated as VP), performs signal processing, and displays it on an observation monitor. Images can be displayed and recorded on a VTR or the like.

The SID signal line has a drive power source (direct current), an output signal (several MHz), and a horizontal synchronizing pulse (several MH).
z), vertical synchronizing pulse (several tens of KHz), etc., signals of various frequencies are mixed, and the connector provided at the end of this signal line is detachably connected to the connector receiver on the VP side.

[0004]

For example, if the connector is connected to the connector receptacle on the VP side while the power of the VP is on, and if a signal other than the power is applied to the SID before the power is supplied to the SID, There is a risk of damage.

The present invention has been made in view of the above points, and an object of the present invention is to provide an electrical connector capable of preventing the SID or the like from being damaged during attachment / detachment.

[0006]

According to the present invention, there is provided an electrical connector comprising a connector having a plurality of contact pins, and a connector receiver having contact pin receivers electrically connected to the contact pins. And, the connector receiver is a contact pin that is connected to the power supply and ground when connected, and the contact pin that is connected to the other contact pin and the contact pin receiver takes precedence over the connection of other contact pins and contact pins, and that is connected to the power supply and ground when disconnected. By making the contact pin receiver separate from the connection of other contact pins and contact pin receivers last, even if the connector receiver and connector are detached while the power is on, the power supply and the ground are connected at the time of connection. Connected contact pins and contact pin receivers have priority over other contact pins and contact pin receivers, and disconnect Sometimes the contact pins and contact pin receivers connected to the power supply and ground come off lastly than the connection of other contact pins and contact pin receivers, so that the SID etc. connected to the connector etc. can be prevented from being damaged by attachment / detachment. I have to.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. 1 to 3 relate to a first embodiment of the present invention, FIG. 1 shows a structure of a connector in the first embodiment, FIG. 2 shows an electronic endoscope apparatus, and FIG. 3 shows a tip of an electronic endoscope. The structure of the part is shown.

An electronic endoscope apparatus 1 as an example of the image pickup apparatus of the present invention includes an electronic endoscope (also referred to as an electronic scope) 2 and a universal cord 3 of the electronic scope 2 as shown in FIG. A signal processing device 5 which is connectable to a connector 4 attached to an end thereof and a video processor (hereinafter abbreviated as VP) 6 in the signal processing device 5 are connected,
It is composed of a monitor 7 for displaying an image. The electronic scope 2 has an elongated insertion portion 8 for easy insertion into a body cavity or the like, and an operation portion 9 is provided at the rear end of the insertion portion 8.

A light guide 11 for transmitting illumination light is inserted into the insertion portion 8, and the light guide 11 is further extended from the operation portion 9 to the outside of the universal cord 3.
By inserting the connector 4 into the signal processing device 5, the illumination light of the light source lamp 13 forming the light source unit 12 housed in the signal processing device 5 is applied to the incident end surface of the light guide 11. It This light guide 1
An illumination connector 14 is formed on the incident end face side of 1.

The illumination light supplied to the entrance end face by the light source lamp 13 is transmitted to the exit end face side and is irradiated to the subject side through the illumination lens 15 arranged immediately before the exit end face. The subject illuminated through the illumination lens 15 is
By the objective lens 16 attached to the tip of the insertion portion 8,
An image is formed on a solid-state image sensor (abbreviated as SID) 17 arranged on the focal plane.

One end of a signal cable 18 consisting of a plurality of signal lines is connected to the SID 17, and is inserted into the insertion portion 8 and the universal cord 3 and the other end is a connector 4.
Is connected to the signal connector (or electric connector) 21. The signal connector 21 is electrically connected to the VP 6 by connecting to the signal connector receiver (or electric connector receiver) 22 of the signal processing device 5. By the way, the insertion portion 8 has a curved portion 23 (see FIG. 3) formed on the front side of the flexible portion, and a tip forming portion 24 is formed further on the front portion of the curved portion 23.

As shown in FIG. 3, the tip forming member 25 forming the tip forming portion 24 is a substantially cylindrical member and is made of metal, ceramics or the like. The tip of an insulating jacket 26 is fixed to the outer peripheral surface of the tip forming member 25, and the outer periphery and front end surface on the front side are covered with an insulating tip cover 27. An objective lens 16 attached to a lens frame 29 via an insulating frame 28 is attached to the tip forming member 25 by providing a through hole parallel to the axis of the cylinder.

A nozzle 31 is provided in a small-diameter hole formed adjacent to the objective lens 16 so as to project toward the outer surface of the objective lens 16. The nozzle 31 communicates with an air / water supply passage of an air / water supply tube 33 attached to the rear end side of the small hole via a mouthpiece member 32.

Further, a through hole is provided in the tip forming member 25, and the emitting end of the light guide 11 is fixed via the base member 34. The base member 34 fixed to this through hole projects rearward and covers the light guide 11.
The front end of is fixed. An illumination lens 15 is attached immediately before the exit end face of the light guide 11. Further, the through hole formed in the tip constituent member 25 has a mouthpiece member 3
Tube 38 forming forceps channel 37 through 6
The front end of the is stuck.

By the way, on the outer periphery of the lens frame 29, S
The SID frame 39 to which the ID 17 is attached is fitted and fixed with the screw 41. In this case, the SID frame 39 is slid relative to the lens frame 29, and the light receiving surface of the SID 17 is adjusted to a position where it becomes the focal plane and fixed with screws 41.

Leads 42, ..., 42 are provided so as to project from the back surface (back surface) of the SID 17, and the leads 42 ,.
Are connected to the inner conductors 44A, ..., 44A of the shield wires 44, ..., 44 in the signal cable 18 via the substrates 43, 43 arranged in parallel, for example.

The signal cable 18 is formed into a stranded wire, for example, and is inserted through the protective tube 45.
At the rear part of the cable stopper 46, the outer conductors 44B, ...
4B is fixed by soldering or the like. This cable stop 46
Is fixed to a pipe stop 47, and the pipe stop 47 has a rear end of a pipe 48, the front end of which is solidified, fixed to the outer periphery of the SID frame 39 to which the SID 17 is attached.

The outer peripheral surface of the pipe 48 is further covered with an insulating tube 49. This insulating tube 49
The outer side surface of the SID frame 39 extends forward of the front end and rearward of the rear end of the cable stop 46 to cover the electrical component section 50.

The electric component section 50 includes the SID 17 and the S
, 42, which is an electrical mounting portion with the end portion of the signal cable 18 connected to the leads 42, ..., 42 of the ID 17, and this electrical component portion 50 is a lens frame 29 made of metal, and is fitted to the lens frame 29. SID frame 39 made of metal fixed with, and a pipe 4 made of metal having its front end fixed to the SID frame 39
8. The rear end of the pipe 48 is shielded by a metal pipe stop 47 fixed to the pipe stop 47 and a metal cable stop 46 fixed to the pipe stop 47.

The electrical component section 50, which is insulated and coated with the insulating tube 49, has the lens frame 29 fixed to the SID frame 39.
It is assembled by inserting the insulating frame 28 into the through hole of the tip forming member 25 (from the rear) and fixing it with a screw 51. After fixing the screw 51, it is fixed with an adhesive. Then, by removing the screw 51, the electrical component section 50 can be removed from the tip forming member 25 for replacement or repair. A peripheral groove is formed on the outer peripheral surface of the insulating frame 28, and a watertight O-ring 52 is housed therein.

Since the electrical component section 50 covers the outer peripheral surface of the SID frame 39 with the insulating tube 49, the shield portion can be attached to the tip forming member 25 by attaching it to the tip forming member 25.
Does not conduct with. In this way, since the electric component section 50 is shielded, it is possible to prevent external noise from entering when the forceps channel 37 is used through a high-frequency treatment instrument.

The electrical component section 50 is housed in a cylindrical pipe 53 whose front end is fixed to the tip forming member 25, and a bending piece 54 is rotatably supported at the rear end of the cylindrical pipe 53. The portion of an appropriate length behind the pivot portion serves as the curved portion 23. In FIG. 2, the operation unit 9 is provided with a switch 55, which is connected to the VP 6 side via the single wires 56, 56 so that, for example, switching between a moving image and a still image can be performed.

The structure of the signal connector 21 and the signal connector receiver 22, which are the main parts of the first embodiment, is shown in FIG.

This connector 21 basically divides a plurality of signal lines 44, ..., 44 into high frequency and low frequency,
Inner shield frame 61 provided inside outer shield frame 60
, 62a and 62b, ..., 6 which are made of metal and have a single pin structure which is arranged inside and outside and is partitioned by
2b, while the connector receiver 22 to which this connector 21 is connected has the same structure.

That is, in the connector 21, a detachable metal shield frame 64 having a screw hole is provided on the base side of an outer metal shield frame 60 covered with an insulating frame 63. . The insulating frame 63 is covered with a (metal) connector exterior member 65 shown by a dotted line.

The shield frame 60 has a cylindrical shape, and a disk-shaped insulator 66b having a circular opening at the center inside thereof is overlapped with an insulator 67b having substantially the same shape, and a tightening ring 68b provided with a screw on the outer peripheral surface. The shield frame 60
It is fixed by being screwed into the screw hole on the inner peripheral surface of the. An inner shield frame 61 is fitted in the opening provided at the center of the insulator 66b, and an insulator 67a having substantially the same shape as the disc-shaped insulator 66a is further laid inside the shield frame 61 and fixed by a tightening ring 68a. To be done.

A plurality of small holes are provided in the insulators 66a and 66b and the insulators 67a and 67b which are superposed on the insulators 66a and 66b, and the contact pins 62a having a single pin structure,
, 62a and 62b, ..., 62b are penetrated. The contact pin 62a or 62b is formed with a large-diameter flange at an intermediate portion near the base portion, and the flange portion is fitted into the enlarged diameter step portion of the insulator 67a or 67b.
The movement is restricted by the tightening rings 68a and 68b, respectively. Further, each shield frame 60, 61 has a small diameter on the front side and is provided with stepped portions 60A, 61A. The insulators 66b, 66a are brought into contact with the stepped portions 60A, 61A, respectively, so that the forward movement thereof is restricted. , And are fixed by tightening rings 68a and 68b.

By the way, the end portions of the respective signal lines 44, ..., 44 in the signal cable 18 for high frequency use, for example, a base side opening 6 in the inner shield frame 61.
The inner conductor 44A and the outer conductor 44B are separated from each other when they are accommodated at a distance equal to or larger than the radius of 1B. Then, the outer conductors 44B, ..., 44B are collectively soldered to the contact pins 62a in the inner shield frame 61 and soldered to the inner wall surface of the shield frame 61 by the shield connecting line 72a.

The inner conductors 44A, ..., 44A are soldered to the contact pins 69a, respectively. The low frequency signal lines 44, ..., 44 are also divided into an inner conductor 44A and an outer conductor 44B when they are within a distance equal to or larger than the radius of the base side opening 60B of the shield frame 60.
The outer conductors 44B, ..., 44B are collectively soldered to the inner wall surface of the outer shield frame 60 by the shield connecting line 72b and soldered to the contact pins 62b, so that the inner conductors 44A ,. Contact pin 62b,
..., 62b is soldered to the base.

A screw is provided on the base side of the outer shield frame 60, and the shield frame 64 can be detachably attached by screwing the screw. Then, the shield frame 60
Is fixed to a metallic connector exterior 65 that becomes a high frequency noise source during treatment with a high frequency treatment tool. The single signal line 56 is connected to the connection pin 62b on the outer side of the shield frame 61.

On the other hand, in the connector receiver 22, the metal contact pin receivers 81a, ..., 81a and 81b, ..., 81b, which are the receiving members for the contact pins 62a, ..., 62a and 62b ,. It is provided separately inside and outside the shield frame 82. Contact pin receiver 81a, ...,
81a is an insulator 83a and an insulator 84.
It is sandwiched by a and abut against the stepped portions 82A and 82B of the shield frame 82, and is tightened and fixed by a tightening ring 85.

At this time, the insulator 84a is firmly fixed by the stepped portion 82A and the tightening ring 85, but the insulator 83a is clamped only by being sandwiched between the insulator 84a and the stepped portion 82A. In addition, a slight margin is provided in the radial direction so that even if the contact pin 62a on the connector 21 side comes in with a slight deviation, the insulator 83a can be displaced in the radial direction. On the other hand, the contact pin receiver 81b arranged outside the shield frame 82 is an insulator 86b.
And the insulator 87b, and is abutted against the stepped portions 88A and 88B of the outer metal shield frame 88, and is tightened and fixed by the tightening ring 89. Also at this time, the shield frame 82 and the insulator 86
b and the contact pin receiver 81b can be slightly displaced in the radial direction. The contact pin receiver 81a inside the shield frame 82 can also be slightly displaced in the radial direction.

The contact pin receivers 81a and 81b are connected to the signal line 44. In this case, the branch portion of the inner conductor 44A and the outer conductor 44B in the signal line 44 is the opening 8 of the inner shield frame 82 in the case of high frequency.
It is stored in the back (the left side in FIG. 1 is the back) for a distance equal to or larger than the radius of 2C. Similarly, in the case of low-frequency ones, the branch portion is housed inside the shield frame 88 for a distance equal to or larger than the radius of the opening (not shown) of the outer shield frame 88.

The contact pin receivers 81a and 81b to which the outer conductor 44B is connected are shield connecting wires 91, respectively.
a and 91b are electrically connected to the inner wall surfaces of the inner shield frame 82 and the outer shield frame 88 by soldering or the like.

The internal conductor 44A in the high-frequency signal line 44 is connected to the contact pin receiver 81a, and the low-frequency internal conductor 44A is connected to the contact pin receiver 81b. Then, in the connected state in which the connector 21 is connected to the connector receiver 22, the contact pins 62a and 62b are inserted into the contact pin receivers 81a and 81b, respectively, and are electrically connected.

Further, the tip outer peripheral portion 6 of the inner shield frame 61
1D is inserted into the tip inner peripheral portion 82D of the shield frame 82 on the connector receiving 22 side with a sufficient gap (for reducing the amount of force). Therefore, the electrical connection is not particularly intended, but it may happen that some of them are in contact with each other due to dimensional variations, eccentricity, or the like and are electrically connected. The shield frame 61 and the shield frame 82 are electrically connected to each other by the contact pin 6 connected to the high frequency external conductor 44B.
2a and the contact pin receiver 81a are connected.

Further, the tip inner surface 60 of the outer shield frame 60
C is fitted to the outer peripheral surface 86A of the outer insulator 86b on the connector receiving 22 side with a gap, and serves as a guide when the connector 21 is attached to and detached from the connector receiving 22. The tip surface 60D of the outer shield frame 60 contacts the tip surface 88D of the outer shield frame 88.

Incidentally, the tip surface 60D and the tip surface 88D
May have a gap large enough to prevent noise from entering. Further, the tip surfaces 60D and 88D may or may not be in electrical contact. Incidentally, the shield frames 60 on both outer sides,
88 is a contact pin 6 connected to the low frequency outer conductor 44B
2b and the contact pin receiver 81b electrically connect.

The amount of force when the connector 21 is attached to the connector receiver 22 is only friction between the contact pins 62a and 62b and the contact pin receivers 81a and 81b. In order to give a feeling, a click feeling may be given by using a C ring or the like (not shown), and by using the C ring or the like, the front end face 60D of the outer shield frame 60 is shielded on the connector receiving 22 side. The tip surface 88D of 88 may be biased. The insulators 66a, 67a, 66b, 67b, etc. are made of an insulating material.

According to the first embodiment having the electrical connection means with the connector 21 and the connector receiver 22 as described above, each high-frequency signal line 44 includes the shield frames 61 and 8.
Since the structure is shielded by 2 and connected, noise is not given to the low frequency signal line 44.

In the first embodiment constructed as described above, the outer shield frame 60, the outer conductor 44B, and the cable stopper 4 are provided.
6. Shield by a pipe stopper 47, SID frame 39, lens frame 29 against disturbance such as high-frequency treatment, and shield by a shield frame 61 for protecting low-frequency signals against high-frequency signals at a single-pin connection portion in the connector means. Of 2
There are different types of shields.

If high frequency treatment is not performed, the outer shield frames 60 and 88 need not be shielded. Further, although only high frequencies are shielded collectively, only low frequencies may be shielded collectively. Further, both low frequency and high frequency may be shielded collectively.

The shield frames 60, 61 or the shield frames 82, 88 are formed concentrically, respectively.
The structure is not limited to this, and an eccentric structure may be used.
Further, the cross section may be irregular instead of the cylindrical shield.
(In order to reduce the size, the layout may be an appropriate shape.) In the present embodiment, two groups of high frequency and low frequency were divided, but they may be divided into several groups, and some of them may be shielded collectively. However, this will be described in the second embodiment described later.

According to the first embodiment described above, since the connection is realized by the single pin structure, the size can be reduced and the life can be extended. Since the high frequency and / or low frequency are grouped and shielded, it is possible to realize an SN ratio similar to that when a coaxial contact is used. FIG. 4 shows a schematic configuration of the second embodiment of the present invention. This is the case when a plurality of collective shields are performed.

The input / output terminal of the SID 17 built in the tip of the insertion portion 8 of the endoscope device 101 is connected to the V of the signal processing device 5.
By the signal cable 18 to the input / output terminal of each board of P6,
It is electrically connected.

The signal cable 18 is used for transmitting the next signal. That is, Vout: SID output signal (~
Several MHz, dummy: noise canceller signal line (up to several MHz), VDD: SID drive power source (DC), φV
1 to 4: Vertical sync pulse (several 10 kHz), φH1 to 2:
Horizontal sync pulse (several MHz), φR: reset pulse (several MHz). Among them, Vout, dummy, φV1 to 4, φH
Since 1 to 2 and φR are high-frequency waves, they become a noise source to the outside, so shield lines are used as signal lines.
Since D and GND do not become a noise source to the outside, they are transmitted using the single wire 56.

At the connecting portion of the connector 21 'and the connector receiver 22', the shield wire 44 is divided into an inner conductor 44A and an outer conductor 44B, and a contact pin 62 and a contact pin receiver 81.
Will be connected in. Furthermore, since the signal cable 18 has a combination of high-frequency signals and noise-free signals, Vout and dummy, φV1 to 4, and φH1 to 2,
It is divided into 4 groups with φR (where φR is 1
Books only), collective shield frames 103a, 103b, 103
It is shielded collectively by c and 103d. The inner conductors 44A each include one set of contact pins 62i (i = a, b,
c, d) Connected by the contact pin receiver 81i, the outer conductor 4
4B are grouped into one within each group, and shield frame 1
After being connected to 03i, they are connected by the shield connecting line 104i via the contact pin 62i and the contact pin receiver 81i.

The Vout and dummy signal lines 44 are connected to the SID via the contact pin 62a and the contact pin receiver 81a.
It is connected to the power supply and signal processing circuit 105. Also, V
DD and GND are connected to the contact pins 62,
It is connected to the SID power supply and signal processing circuit 105 via the contact pin receiver 81. Also, φV1 to 4 are
A vertical synchronizing pulse generation circuit (abbreviated as φV circuit in the drawing) 106 via a contact pin 62b and a contact pin receiver 81b arranged in the collective shield frame 103b.
Connected to.

Further, φH1 to 2 are collective shield frames 103c
It is connected to a horizontal synchronizing pulse generating circuit 107 (abbreviated as φH circuit in the drawing) via a contact pin 62c and a contact pin receiver 81c arranged inside. Further, φR is connected to the reset circuit 108 via the contact pin 62d and the contact pin receiver 81d arranged in the shield frame 103d.

In the first embodiment, the outer conductor 44B is connected inside the collective shield, but in the second embodiment, it is connected outside. The VP6 is adapted to be supplied with power from a commercial power source via a transformer 109 for isolation, and is connected to the GND or SID of the VP6.
The GND of 17 is not connected to the GND of the signal processing device 5 or the ground, and can be set to the same potential as the patient by floating so that an electric shock accident can be prevented.

This embodiment shows an example in which the signal cables 18 are divided into a plurality of groups and shielded collectively, and it is natural that the number and type (name) of the signal cables 18 differ if the SID 17 is different. Of course, the present embodiment can be applied to each SID by dividing it into a group in which no noise is exchanged. As in the first embodiment, the metallic tip forming portion, the bending portion, and the flexible portion are covered with an insulating jacket. Also, the connection is made in a state of being covered with the insulating member of the connector portion.

The opening of the outer conductor 44B is located inside the opening of the shield frame 103i so that noise does not leak from the opening of the collective shield frame 103i. The effects of the second embodiment are almost the same as those of the first embodiment.
FIG. 5 shows a third embodiment of the present invention.

In this embodiment, an O-ring is used to provide a waterproof structure (water-tight adhesion may be used instead of the O-ring). For example, in the connector 21 of the first embodiment shown in FIG. 1, an insulator 66a having a small hole penetrating each contact pin 62a is provided with a diameter-increasing concave portion at the end of the small hole on the scope side for waterproofing. It contains the ring 111. Similarly, the insulator 66b having a small hole penetrating the contact pin 62b also has a diameter-increasing recess formed at the end of the small hole on the scope side to accommodate the waterproof O-ring 112. Further, the peripheral edges of the insulators 67a, 67b on the side of the stacked insulators 66a, 66b are notched in a taper shape to house the waterproof O-rings 113, 114, respectively, and thus the connector 11 having a waterproof structure is provided.
5 has been realized.

Others are the same as those in the first embodiment. When coaxial contacts are used, it is almost impossible to make the connector waterproof, and conventionally, when the endoscope is washed with water or immersed in a chemical solution, the user attaches a waterproof cap to the electrical connector to waterproof it. However, this is a very troublesome work, and if you forget to add it and soak it in the liquid, water will enter the endoscope and you will not be able to use it VP indirectly Although there is a risk of breakage, if the connector 115 in the third embodiment is used, the connector 115 has a single pin structure, so that the structure can be a waterproof structure with a simple structure.

The O-rings 111, 112, 113, 1
14 can be disassembled. On the other hand, these O-rings 111 and 11
A watertight adhesive may be used without using 2, 113 and 114, and in this case, there is an effect that it can be made compact.

FIG. 6 shows the main part of the connector 121 in the fourth embodiment of the present invention. In this embodiment, in the connector 21 shown in FIG.
Disc-shaped or hollow disc-shaped rubber packings 122 and 123 as shown in FIGS. 7 and 8 are laid on the surface 6b on the surface opposite to the insulators 67a and 67b, and further, the packings are respectively attached by rubber pressers 124 and 125. 122, 12
It has a structure that compresses 3.

The packing 122 or 123 is provided on the contact pins 6 of the insulators 66a and 66b, respectively.
A small hole 126 is provided in communication with the small hole (through which 2a or 62b passes). When each small hole 126 is pressed by the insulator 66a and the rubber receiver 124 or the insulator 66b and the rubber receiver 125, the inner peripheral surface of the small hole 126 is in close contact with the outer periphery of the contact pin 62a or 62b so as to be waterproof. There is.

The insulators 66a and 66b are formed by notching the packing-side peripheral edge of the small hole in the portion through which the contact pin 62a or 62b penetrates in a tapered shape.
When 2 or 123 is pressed, the packings 122 and 123 are deformed and adhered to the outer circumference of the contact pin 62a or 62b in a wide area to increase the waterproof function.

The rubber pressers 124 and 125 are also provided with small holes communicating with the small holes of the insulators 66a and 66b, and the peripheral portions of the small holes are similarly tapered. In addition, the peripheral edges of the insulators 66a, 66b or the rubber pressers 124, 125 are also notched in a tapered shape, while the packings 122, 123 are thickened on the outer circumference or the outer circumference and the inner circumference.

According to the fourth embodiment, the tightening ring 68
Each packing 122, 123 can be attached and detached by a or 68b, and it is easy to disassemble and replace when the characteristics deteriorate. Further, it can be made more compact than the case of using the O-ring.

9 to 14 relate to the fifth embodiment of the present invention, FIG. 9 shows a signal connector 130 and a signal connector receiver 131, FIG. 10 shows a part thereof, and FIG. 11 shows that of FIG. FIG. 12 shows an arrangement of contacts of the signal connector, FIG. 12 shows a pattern of the substrate 132 in a cross section taken along the line AA of FIG. 9, and FIG. 13 shows an electrical connection diagram of the SID 17 and the VP 6 in this embodiment. 14 (a) and 14 (b) show the internal structure of the signal cable.

As shown in FIG. 9, the contacts in this embodiment are shield contacts 133, 134, protective contacts 135,
136 and single pin contacts 137 and 138. The shield contact 133 has a contact pin 139 and this pin 139.
The coaxial cable 142 includes an insulating frame 140 that covers the outer periphery of the coaxial cable 142 and a shield frame 141 that surrounds the insulating frame 140.
The inner conductor 142a of the
2b are connected to the shield frame 141, respectively.

On the other hand, the shield contact 134 includes the contact pin receiver 143 and the insulators 144, 1 provided in front and rear around the contact pin receiver 143.
45 and shield frames 146 and 147 that cover these insulators 144 and 145. The inner conductor 148a of the coaxial cable 148 is connected to the contact pin receiver 143 and the outer conductor 148.
b is connected to the shield frames 146 and 147.

For the assembly of the shield contact 134, the insulator 144 and the contact pin receiver 1 are attached to the shield frame 146.
43 and the insulator 145 are inserted in this order, and the coaxial cable 148
Through the shield frame 147 in advance, and
8a is connected to the contact pin receiver 143, and the shield frame 146
The shield frame 147 is inserted into the shield frame 147, and the outer conductor 148b is connected to the shield frame 146 by soldering, and at the same time, the shield frame 147 is fixed to the shield frame 146 to be easily assembled.

For this reason, in the coaxial cable 148, the outer coating 151 is peeled off only in the middle of the cable, and the portion 151a on the tip side of the outer coating 151 is left as the outer coating.
The fray of 48b is prevented so that the shield effect of the coaxial cable 148 can be maintained up to the tip side.

On the outer circumference of the shield frame 141, a cap 150 for shielding the wiring portion of the cable wired to the shield contact 133 constitutes a first shield means together with the shield frame 146. Above protective contact 135
Is a contact pin 152, an insulator 153, and a protective frame 154.
It has a structure that prevents the fingers from easily touching the contact pins 152. This can be used where there is a risk of electric shock when the user touches the contact pin 152.

The other protective contact 136 includes a contact pin receiver 155 and protective frames 156 and 157. The protective frames 156 and 157 are provided to regulate the position of the contact pin receiver 155. Further, the pin 158 is not a normal contact pin, is longer than the other contact pins, and is connected to the GND of the circuit.
It is made to project in the approximate center of. This is because the user's charged fingers preferentially touch or approach the pin 158 before touching the contact pin, so that the charged static electricity can be discharged and the SID 17 and the like can be protected.

The shield contact 133 and the protective contact 13
5, the single pin contact 137 and the pin 158 are assembled to the insulators 159 and 160, soldered to the substrate 132, and electrically connected to the pattern of the substrate 132. The contacts 133, ..., 135, ..., 137 ,.
11 and 12, the single contact is arranged on the center side and the shield contact is arranged on the outer side. Each pin of the signal connector 130 shown in FIG. 12 is used to connect a signal for driving the SID 17 shown in FIG. 13 and an output signal.

Shield contacts 133a, 133b (one of those represented by the shield contact 133. The same applies hereinafter)
Is, for example, 8 MHz horizontal synchronizing pulses φH1, φH2,
The shield contact 133c has a reset pulse φR of about 16 MHz, and the shield contact 133d has about 16 MHz provided to remove noise mixed in the output signal of the SID17.
The dummy cable for z and the shield contact 133e are about 16M
Hz SID output signal, pin contacts 137a, 137b,
137c and 137d are vertical synchronizing pulses φ of about 16 KHz
Used for connecting V1 to .phi.V4, respectively.

Among these, regarding the exchange of noise between the respective signals, since the high frequency signal gives noise to the low frequency signal and the exchange of noise between the low frequencies is small, a group of vertical synchronizing pulses φV1 to φV4 and horizontal It can be divided into four groups, that is, a group of synchronizing pulses φH1 and φH2, a group of reset pulses φR, and a group of output signals Vout and dummy signals.

The output signal Vout and the dummy signal are about 1 each other.
It has a high frequency of 6 MHz, but because the signals are similar,
Since there is little noise exchange, they can be treated as the same group. Further, it is desirable to treat them as the same group in order to equalize the noise mixed in both as much as possible.

In the first embodiment, these grouped signals are shielded between the groups by the group shield, but in this embodiment, shield contacts are used as individual contacts as described above (however, the vertical synchronizing signal φV1 ~ ΦV
(Excluding 4), only the connection of the shield part is divided into groups, and the connection is made with one shielded single pin contact.

That is, as shown in FIG. 12, the shields of the horizontal synchronizing pulses φH1 and φH2 are put together on the patterns Sa and Sb provided on the substrate 132, and the single pin contact 1
It is connected to 37e. Also, since there is only one reset pulse φR, the shield is directly used for pattern S.
It is connected to the single pin contact 137f by c.

The output signal Vout and the dummy shield are collectively connected to the single pin contact 137g by the patterns Sd and Se. The group of vertical sync pulses φV1 to φV4 is
Since other signals are shielded, the signal connector 1
The inner conductor is not shielded at 30, and each inner conductor is a single pin contact 1
37a, 137b, 137c, 137d, each outer conductor is a single pin contact 137h, 137i, 137j, 137k.
Respectively connected to.

Also in this case, the outer conductors are combined into one and
Although it may be connected to one single-pin contact, it is difficult to wire the four outer conductors to one single-pin contact, and therefore one wire is used for each. Besides this, SI
There are power supplies VDD and GND for driving D17, which are wired to single-pin contacts 137l and 137m, respectively.

These two single pin contacts 137l and 137m
Is longer than the other contact pins as shown in FIG. 9 (only one is shown in FIG. 9), and the signal connector receiver 131
When connecting with, it is preferentially connected to the single pin contact 138,
Further, when detached from the signal connector receiver 131, it is detached last.

This is because when the signal connector 130 and the signal connector receiver 131 are connected while the power source of the VP6 is on, signals other than the power source VDD are supplied to the SID17.
If applied earlier, the SID 17 may be damaged, so the structure is such that connection can be made first to prevent this. The single-pin contacts 137n and 137o are for detecting that the signal connector 130 and the signal connector receiver 131 are connected, and are made conductive on the pattern of the substrate 132.

Insulator 15 incorporating these contacts
9, 160 and the substrate 132 are the signal connector receiver 13
It is fixed by a retaining ring 162 to a guide frame 161 provided with a guide groove when inserting 1. An insulating frame 163 is provided on the outer periphery of the guide frame 161, and an electric connector base 16 is provided on the outer side thereof.
4 is arranged and fixed while being positioned by the angle pin 165.

The guide frame 161 and the retaining ring 162
Form second shield means for shielding the in-connector wiring portion of the cable. The stop ring 162 is further connected to one end of a shield frame 166 forming the second shield means, and the other end of the shield frame 166 is connected to a member 167 forming the second shield means with a screw. There is. This member 167 is electrically connected to the overall shield 168 of the cable. The wiring portion of the cable wired to the shield contact 133 is a cap 150.
The shield frame 146 and the shield frame 146 constitute a first shield means.

In the case of this embodiment, the total shield 168 is divided into seven or four groups of SID signal cables as shown in FIG. And a total shield 168 is provided on the outer periphery thereof, and the outer sheath 1 having an insulating property is further provided on the outer periphery.
Covered with 70b.

The total shield 168 is electrically connected to the second shield means, and the cable, the signal connector receiver 131, and the signal connector 130 are connected to the circuit board of the VP6.
Further, a double shield structure is provided up to the cable connected to the SID 17 so that a double shield effect can be obtained.

On the other hand, in the signal connector receiver 131, each shield contact 134, protection contact 136, single pin contact 13
8 is sandwiched between the insulators 171 and 172,
It is mounted on the connector base 173 and fixed by a retaining ring 174. At this time, the insulators 171, 17
2 is positioned by angle pins 175 and 176,
The angle pins 175 and 176 also serve as guides when mounted on the signal connector 130.

Since all the pins on the signal connector 130 side are fixed, the contacts on the signal connector receiving 131 side absorb the backlash, so that it cannot be fixed to the insulators 171 and 172. Therefore, the shield frames 146, 147 and the single-pin contact 138 (corresponding to the pattern of the substrate 132) cannot be attached and wired.
It is made conductive by 7.

With the signal connector 130 and the signal connector receiver 131 mounted, the cap 150 and the shield frames 141, 146, 147 serve as the first shield means,
The shield frame 166, the member 167, the guide frame 161, the retaining ring 162, and the connector mouthpiece 173 serve as the second shield means. The first shield means is connected to the outer conductor of each cable and the second shield means is connected to the general shield 168.

Further, since the second shield means is assembled to the electric connector base 164 via the insulating frame 163, it is insulated from the exterior metal. This is to prevent the influence of disturbance (for example, high-frequency noise, etc.) entering by the exterior metal. Further, the first shield means includes shield frames 141, 146 as shown in FIG.
A gap is provided so as not to contact with each other, and another single pin contact is used for conduction.

This prevents an increase in the amount of force due to the contact between the shield frames, and the characteristic impedance due to the shield contact causes the contact between the shield frames.
This prevents fluctuations due to non-contact and disturbance of the obtained signal. That is, the characteristic impedance is kept constant.

Note that FIG. 14A shows a structure in which seven signal lines are coaxial lines, and FIG.
And the signal line (type B) of VDD is covered with the conductor 181 1
The single line covered with 82 and the Vout and dummy signal lines (type A) are formed by coaxial lines as shown in FIG. Each coaxial line has an inner conductor 142a and an inner coating 18
3, the outer circumference is covered with the outer conductor 142b, and the outer circumference is covered with the outer covering 184. By the way, as described above, the double shield structure is formed by the general shield 168.

However, in FIG. 13, conductors 190, 19
The effect is slightly different depending on whether or not to connect with 1. Wiring the conducting wire 190 enhances the shielding effect against high frequency radiation noise radiated from the internal coaxial cable.
Since a closed circuit is formed between the general shield 168 and the GND 192 to create an inductance and receive high frequency noise, the shield effect against high frequency noise from the outside is slightly reduced.

On the other hand, if the conducting wire 190 is not wired, on the contrary, a closed circuit is not formed, so that the circuit is strong against high frequency noise from the outside, but radiation noise (from the inside) leaking from the opening near the SID 17 increases. . The same can be said for the conductor 191. Therefore, wiring may be performed according to the purpose. However, in the former case, it is better not to conduct the total shield 168 to the SID frame 39, the pipe 48, and the pipe stopper 47, but to connect them by loosening the shield wires and wrapping them in evenly so that there is no gap. .

Gore sheet 178 of signal connector 130
Is for covering the electric connector cap 164 with a waterproof cap (not shown) so that the air sent by the pressure cap provided on the waterproof cap can pass only the air without passing moisture. The one and the ring 1
It is watertightly fixed at 79.

The user does not accidentally put on the waterproof cap so that it will not pass through even when it is soaked in water. Further, for that reason, all the constituents of the respective contacts 133 and 135 are fixed in a watertight manner to provide waterproof contacts. Also,
The contacts 133, 135, 137 and the pin 158 are watertightly fixed to the insulator 160.

Furthermore, the insulator 160, the guide frame 161, the insulating frame 163, and the electrical connector base 164 are also watertightly fixed. A watertight O-ring 195 is mounted around the outer periphery of the electrical connector base 164. Reference numeral 197 is a guide pin used to attach a waterproof cap (not shown) to a cam ring (not shown) used when inserting the signal connector receiver 131.

Although the combination of the signal connector 130 and the signal connector receiver 131 is one in FIG. 13,
This may be plural. Further, it is natural that the number of signal lines or the frequency differs depending on the type of the SID 17, and the grouping may be carried out accordingly.

According to this embodiment, since the shield frame of the shield contact is not a normal contact but a single pin contact having higher resistance, the resistance can be increased. Further, in the case of the signal connector 130, the shield contact can be easily made into a waterproof structure, and a waterproof connector can be realized as a whole.

FIG. 15 shows an image pickup apparatus 2 according to the sixth embodiment of the present invention.
Indicates 01. The imaging device 201 includes an imaging unit 202 and
It is composed of a CCU 204 connected via a signal cable 203. The CCU 204 is connected to a peripheral device 205 such as a display to display an imaged image, or an image is recorded by a recording device such as a video tape recorder (VTR). You can also do it.

In the image pickup section 202, an image pickup tube 207 is arranged on the focal plane of the objective lens 206, and the signal photoelectrically converted by the image pickup tube 207 is amplified by the amplification circuit 208, and the image pickup section 2 is obtained.
02 is guided to the signal connector receiver 211 attached to the housing 209. By connecting the connector 212 attached to one end of the signal cable 203 to the connector receiver 211 and connecting the connector 213 attached to the other end of the cable 203 to the connector receiver 214 of the CCU 204, an amplifier circuit The signal amplified at 208 can be sent to the CCU 204 side. This CCU20
The signal processing circuit 215 in the signal processing unit 415 converts the signal into an NTSC composite video signal or an RGB signal.

As the connectors 212 and 213 and the connector receivers 211 and 214, the connectors and connector receivers of the above-described embodiments can be applied. FIG. 16 shows an image pickup device 221 according to the seventh embodiment of the present invention.

In this image pickup device 221, for example, the TV camera 222 is used as the image pickup section in the sixth embodiment.
The TV camera 222 has a connector receiver 211 to which the connector 212 of the signal cable 203 can be connected.
Is provided. Also in this embodiment, the connectors 212, 2
The above-mentioned connector can be used as 13, and the same applies to the connector receivers 211 and 214.

FIG. 17 shows an image pickup apparatus 2 according to the eighth embodiment of the present invention.
31 is shown. In this embodiment, the image pickup device 231 is configured by a CCU built-in camera that has a built-in CCU 232.
In this embodiment, a CCD is provided on the focal plane of the objective lens 206.
233 is arranged, and this CCD 233 is connected to the CCU 232 via a signal line.

In this embodiment, the image pickup device 231 and the peripheral device 205 are provided with signal connector receivers 211 and 21 respectively.
4 is provided, and signals can be transmitted by connecting the connectors 212 and 213 to the respective connector receivers 211 and 214. The connectors 212, 213,
The connectors and connector receivers described above can be used as the connector receivers 211 and 214. The connector 21
2 and 213 may have the same structure or different structures. The same applies to the signal connector receivers 211 and 214.

[0101]

As described above, according to the present invention, an electrical connector including a connector having a plurality of contact pins and a connector receiver having contact pin receivers electrically connected to the contact pins, When the connector and the connector receiver are connected, the contact pin and the contact pin receiver that are connected to the power supply and the ground are connected prior to the connection of other contact pins and the contact pin receiver, and are connected to the power supply and the ground when disconnected. Since the contact pins and contact pin receivers are detached lastly from the connection of other contact pins and contact pin receivers, even if the connector receiver and connector are detached while the power is on, the power and The contact pin and contact pin receiver connected to the ground are connected and disconnected with priority over the connection of other contact pins and contact pin receivers. Sometimes, the contact pin and the contact pin receiver connected to the power supply and the ground are disconnected lastly from the connection of other contact pins and the contact pin receiver, so that the SID or the like connected to the connector or the like can be prevented from being damaged by the detaching operation. .

[Brief description of drawings]

1 to 3 relate to a first embodiment of the present invention,
FIG. 1 is a perspective view showing a signal connector and a signal connector receiver in the first embodiment.

FIG. 2 is a configuration diagram showing an entire first embodiment.

FIG. 3 is a cross-sectional view showing the structure on the distal end side of the electronic endoscope.

FIG. 4 is an explanatory view showing a structure of a main part of a second embodiment of the present invention.

FIG. 5 is a perspective view showing a part of a signal connector according to a third embodiment of the present invention.

FIG. 6 is a perspective view showing a part of a signal connector according to a fourth embodiment of the present invention.

FIG. 7 is a perspective view showing a part of one packing in the fourth embodiment.

FIG. 8 is a perspective view showing a part of the other packing in the fourth embodiment.

FIG. 9 is a sectional view showing a structure of a signal connector and a signal connector receiver in a fifth embodiment of the present invention.

10 is a cross-sectional view showing a part of the signal connector and the signal connector receiver in a cross section different from that in FIG. 9;

11 is a diagram showing an arrangement of contacts of the signal connector of FIG.

12 is a cross-sectional view taken along the line AA of FIG.

FIG. 13 is an electrical connection diagram of a solid-state image sensor and a video processor in the fifth embodiment.

FIG. 14 is a cross-sectional view showing the structure of a cable.

FIG. 15 is a configuration diagram showing a sixth embodiment of the present invention.

FIG. 16 is a configuration diagram showing a seventh embodiment of the present invention.

FIG. 17 is a configuration diagram showing an eighth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Electronic endoscope apparatus 2 ... Electronic scope 3 ... Universal cord 4 ... Connector 5 ... Signal processing apparatus 6 ... Video processor (VP) 17 ... SID 18 ... Signal cable 21 ... Signal connector 22 ... Signal connector receiving 44 ... Signal line 44A ... Inner conductor 44B ... Outer conductor 60, 61 ... Shield frame 62a, 62b ... Contact pin 66a, 66b, 67a, 67b ... Insulator 81a, 81b ... Contact pin receiver 82, 88 ... Shield frame 84a, 87b ... Insulator

Claims (1)

[Claims] 1. A connector having a plurality of contact pins,
An electrical connector comprising the contact pin and a connector receiver having a contact pin receiver electrically connected to each other, wherein the connector and the connector receiver are connected to a power supply and a ground at the time of connection, and the contact pin receiver is another contact pin. And the connection of the contact pin receiver is prioritized, and at the time of disconnection, the contact pin and the contact pin receiver connected to the power source and the ground are disconnected lastly than the connection of other contact pins and the contact pin receiver. An electrical connector characterized in that