JP4420696B2 - Coaxial connector for electronic endoscope - Google Patents

Description

  The present invention relates to a coaxial connector for an electronic endoscope.

In the electronic endoscope, a coaxial connector for connecting a coaxial cable to the other party is arranged at a connector portion connected to the video processor, and the female connector of the coaxial connector of such an electronic endoscope. The member is configured such that a slit is formed in the front end cylindrical portion, and the signal line is connected and fixed from the rear end side from the rear, and the member is water-tightly inserted and bonded to the inside of the electrically insulating insulating cylinder ( For example, Patent Documents 1 and 2).
JP-A-5-300874 JP-A-5-317248

  FIG. 6 shows a coaxial connector of a conventional electronic endoscope as described above, wherein 91 is a female connector member, 92 is a signal line of the coaxial cable, 93 is an insulating tube, and 94 is a tip tube of the signal line 92. It is a slit formed in the shape part in a direction parallel to the axis.

  FIG. 7 shows the latter half of the process when assembling the above-described coaxial connector. An adhesive 95 is applied to the outer peripheral surface of the female connector member 91 to which the signal line 92 is connected and fixed to the rear end by soldering or the like. The female connector member 91 in this state is inserted into the insulating cylinder 93 from the rear, and the outer peripheral surface of the female connector member 91 and the inner peripheral surface of the insulating cylinder 93 are fixed in a watertight manner with the adhesive 95.

  However, in the assembly process of such a part, if the adhesive 95 is excessively applied to the outer peripheral surface of the female connector member 91, the adhesive 95 flows into the slit 94 portion at the tip of the female connector member 91 and May cause poor connection.

  However, if the amount of the adhesive 95 applied to the outer peripheral surface of the female connector member 91 is reduced, the watertightness in the state of being fixed to the inner peripheral surface of the insulating cylinder 93 becomes insufficient, and externally during cleaning and disinfection. There is a risk of causing water leakage.

  In addition, as shown in FIG. 6, the inspection for checking such a defect can be performed only after it is completed, and if there is a defect, the entire unit including the coaxial cable is discarded. There was a lot of waste.

  Therefore, the present invention can greatly suppress the occurrence of defects such as poor water tightness and adhesive flow in the assembly process, and if there is a defect, there are few parts to be discarded and there is little manufacturing efficiency. An object is to provide a coaxial connector for an endoscope.

  In order to achieve the above object, the coaxial connector of the electronic endoscope according to the present invention is such that a female connector member having a slit formed in a distal end cylindrical portion is water-tightly inserted and bonded inside an electrically insulating insulating cylinder. In the coaxial connector of the electronic endoscope in which the signal line of the coaxial cable is connected and fixed to the rear end side of the female connector member from the rear side, the female connector member is formed on the inner side of the insulating tube with a slit formed in the distal end cylindrical portion. A female connector portion that is watertightly fitted and bonded, and a signal line connecting portion that is inserted and connected to the female connector portion from the rear in a state where the signal line is connected and fixed to the rear end portion, and the female connector portion An adhesive reservoir space for storing an excessively applied adhesive is formed in the fitting portion with the insulating cylinder.

  In the second half of the female connector portion, a connection hole for inserting and connecting the signal line connecting portion may be formed from the rear so as not to communicate with the inside of the distal end cylindrical portion. The connection part may be provided with a check mechanism for preventing the signal line connection part from coming out of the female connector part after the signal line connection part is inserted and connected to the female connector part.

  According to the present invention, an assembly for adhering a female connector member to an insulating cylinder is formed by forming an adhesive reservoir space for accumulating extra applied adhesive at a fitting portion between the female connector member and the insulating cylinder. Since a sufficient amount of adhesive can be applied so as not to leak out in the process, it is possible to greatly suppress the occurrence of problems such as poor water tightness and adhesive flow, and the female connector member can be Therefore, when there is a problem in the bonding between the female connector member and the insulating tube, there are few parts to be discarded and the manufacturing loss can be reduced.

  The female connector member has a slit formed in the front end cylindrical portion, and is fitted and bonded to the inside of the insulating tube in a watertight manner, and the rear end of the female connector portion with the signal line connected and fixed to the rear end portion. An adhesive reservoir space for storing an excessively applied adhesive is formed in a fitting portion between the female connector portion and the insulating cylinder.

Embodiments of the present invention will be described with reference to the drawings.
In FIG. 2, reference numeral 1 denotes an endoscope cart that can be moved by placing a set of endoscope inspection apparatuses. An electronic endoscope 3 is suspended from an endoscope support stand 2 provided on the side of the cart. Held in a lowered state.

  Reference numeral 4 denotes a video processor, to which the connector portion 5 of the electronic endoscope 3 is detachably connected, and an imaging signal of an endoscopic observation image taken by the electronic endoscope 3 is processed in various process circuits to obtain an image. The signal is output to the monitor 6.

  FIG. 3 shows a connection portion of the connector portion 5 of the electronic endoscope 3 to the video processor 4, and a large number of contact pins 51 project from the connector tube 50, and a video signal is located at the center axis position. A coaxial connector 10 connected to a coaxial plug (not shown) on the processor 4 side is disposed. Reference numeral 11 denotes a female connector member into which the mating contact pin is inserted, and reference numeral 31 denotes a signal line of the coaxial cable 30 connected to the rear side of the coaxial connector 10.

  FIG. 4 shows the coaxial connector 10, and a stepped cylindrical shape in which the rear half is thicker than the front half in the front half of the conductive shield connection tube 12 that covers the coaxial connector 10 by an electrical insulating material. The formed insulating cylinder 14 is fixed in a watertight manner by insertion and adhesion. Reference numeral 13 denotes an elastic claw for locking the coaxial connector 10 to the connector tube 50.

  The female connector member 11 includes a distal female connector portion 11A in which a slit 16 having a cut opening at the distal end is formed in the distal tubular portion 15 in a direction parallel to the axis, and a signal line 31 of the coaxial cable 30 is a rear end portion. The rear signal line connecting portion 11B is fixed and connected to the rear signal line connecting portion 11B.

  When assembling the coaxial connector 10, first, as shown in FIG. 1, the insulating tube 14 is fixed inside the shield connecting tube 12 and the female connector portion 11 </ b> A is fixed inside the insulating tube 14. The female connector portion 11 </ b> A is inserted into the insulating cylinder 14 from behind and is fixed in a watertight manner by the adhesive 17.

  As shown in FIG. 4, the adhesive portion between the female connector portion 11 </ b> A and the insulating cylinder 14 is used to store an extra portion of the adhesive 17 applied to the female connector portion 11 </ b> A. The adhesive reservoir space 18 is formed at two locations with a gap between the outer diameter of the female connector portion 11 </ b> A and the inner diameter of the insulating cylinder 14.

  Therefore, when the female connector portion 11A and the insulating cylinder 14 are bonded, even if a sufficient amount of the adhesive 17 is applied to the outer peripheral portion of the female connector portion 11A, the excessively applied adhesive 17 remains on the tip side. It can adhere | attach on the state in which watertightness was ensured reliably, without flowing out to the slit 16 part.

  Then, the adhesive 17 is cured in a state where the female connector portion 11A is adhered to the insulating tube 14 fixed in the shield connection tube 12, and the water tightness and the outflow state of the adhesive 17 can be checked. Therefore, if there is an assembly failure, it is only necessary to discard them, and there is no need to discard the coaxial cable 30 or the like.

  As described above, when the female connector portion 11A is bonded and fixed to the insulating tube 14, the process proceeds to a process of assembling the latter half portion of the coaxial connector 10. As shown in FIGS. 4 and 1, the female connector portion 11A A connecting hole 19 for inserting the signal line connecting portion 11B in the axial direction from the rear is formed in the rear half so as not to communicate with the distal end tubular portion 15.

  Further, the signal connector 11A and the signal connector 11B are connected to the connector 11A after the signal connector 11B is inserted and connected to the connector 11A. A check mechanism 20 for blocking is provided.

  The check mechanism 20 of this embodiment is configured so that a check claw 20A formed by bending toward the inner connection hole 19 so as to elastically deform the female connector portion 11A itself and the check claw 20A are engaged. And a recess 20B formed on the outer peripheral surface of the signal line connecting portion 11B.

  Then, as shown in FIG. 5, before inserting the signal line connecting portion 11B into the female connector portion 11A, the shield conductive tube 23 is fitted with the rear insulating tube 22 interposed in the rear outer peripheral portion of the female connector portion 11A. The shield conductive cylinder 23 is mechanically caulked and fixed in the shield connection cylinder 12 by bending the caulking end 24 formed at the rear end of the shield connection cylinder 12 inward.

  On the other hand, in the signal line connecting portion 11B, the tip of the signal line 31 of the coaxial cable 30 is inserted into the signal line connecting hole 21 formed in the rear half portion from the rear side, and is connected and fixed by soldering 35. In this state, the signal line connecting portion 11B is inserted into the female connector portion 11A from the rear.

  Then, as shown in FIG. 4, the signal line connecting portion 11B is locked to the female connector portion 11A by the check mechanism 20, and the signal line 31 of the coaxial cable 30 and the female connector portion 11A are electrically connected. To do.

  Then, the shield 32 of the coaxial cable 30 is connected and fixed to the shield conductive tube 23 by soldering 25, whereby the shield 32 is brought into conduction with the shield connection tube 12, and the assembly of the coaxial connector 10 is completed.

  The present invention is not limited to the above embodiment. For example, the coaxial connector 10 is used in a portion other than the connector portion 5 of the electronic endoscope 3 connected to the video processor 4. There is no problem.

It is side surface sectional drawing which shows the state of the process of the assembly first half of the coaxial connector of the electronic endoscope of the Example of this invention. It is a perspective view in the state where the endoscope apparatus of the example of the present invention was put on the cart. It is side surface sectional drawing which shows a part of connector part of the electronic endoscope of the Example of this invention. It is side surface sectional drawing of the coaxial connector of the electronic endoscope of the Example of this invention. It is side surface sectional drawing which shows the state of the process of the assembly latter half of the coaxial connector of the electronic endoscope of the Example of this invention. It is side surface sectional drawing of the coaxial connector of the conventional electronic endoscope. It is side surface sectional drawing which shows the state of the process of the assembly latter half of the coaxial connector of the conventional electronic endoscope.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Coaxial connector 11 Female connector member 11A Female connector part 11B Signal line connection part 14 Insulation cylinder 15 End cylindrical part 16 Slit 17 Adhesive agent 18 Adhesive reservoir space 19 Connection hole 30 Coaxial cable 31 Signal line

Claims (3)

A female connector member with a slit formed at the distal end cylindrical portion is watertightly inserted and bonded to the inside of the electrically insulating insulating tube, and the signal line of the coaxial cable is fixedly connected to the rear end side of the female connector member from behind. In the coaxial connector of the made electronic endoscope,
In the state where the female connector member is connected and fixed to the rear end portion, the female connector portion in which the slit is formed in the tip cylindrical portion and the watertightly inserted and bonded inside the insulating tube. An adhesive for accumulating an extra applied adhesive in a fitting portion between the female connector portion and the insulating tube by dividing the female connector portion into a signal line connecting portion that is inserted and connected from the rear. A coaxial connector for an electronic endoscope, wherein a pool space is formed. 2. The electronic interior view according to claim 1, wherein a connection hole for inserting and connecting the signal line connection portion is formed in the rear half portion of the female connector portion from the rear so as not to communicate with the distal end tubular portion. Mirror coaxial connector. The female connector portion and the signal line connecting portion have a check mechanism for preventing the signal line connecting portion from coming out of the female connector portion after the signal line connecting portion is inserted and connected to the female connector portion. The coaxial connector of the electronic endoscope according to claim 1 or 2, wherein

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