JP2007173073A - Drip-proof connector and its connection structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drip-proof connector capable of suppressing corrosion, rise of a resistance value and destabilization of connection by preventing intrusion of a droplet; and its connection structure. <P>SOLUTION: This drip-proof connector is composed of: a housing 1 made of a resin; a plurality of conductive pins 10 incorporated in the housing 1 and each having both ends respectively exposed from both its front and back surfaces; an elastically-deformable drip-proof cover 20 covering at least exposed parts exposed from the front surface of the housing 1 of the plurality of conductive pins 10; and a frame 30 detachably fitted to the drip-proof cover 20. The drip-proof connector is nipped between a circuit board 40 of a pulmonic dosing appliance and an electrode of a replaceable cartridge 50 to electrically connect them to each other. Since the drip-proof cover 20 covers the exposed part of each conductive pin 10 to restrain and prevent a droplet from intruding between a body pin 11 of the conductive pin 10 and a movable pin 12, corrosion, rise of a resistance value and destabilization of connection of the conductive pin 10 are never caused. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a drip-proof connector that electrically connects, for example, a circuit board of a transpulmonary medication apparatus and a cartridge, and a connection structure thereof.

  Conventionally, a pressure contact type connector is used for electrical conduction connection between a circuit board of an electronic device and an electrical joint, and this type of pressure contact type connector is composed of a resin housing (not shown), and this housing. A plurality of conductive pins that are built in and exposed at both ends from both sides thereof are interposed between the circuit board of an electronic device such as a mobile phone and the electrode of the electrical joint to electrically connect them.

  Each conductive pin includes a hollow body pin built in the housing, a movable pin inserted into the body pin so as to reciprocate and a tip portion protruding from the housing, and a movable pin interposed between the body pin and the movable pin. A coil spring that is elastically biased in a direction away from the body pin (see Patent Document 1).

By the way, in recent years, a transpulmonary dosing device has been attracting attention by inhaling a mist-like drug from the mouth instead of painful injection (see Patent Document 2). If the conventional pressure contact type connector can be used for the conductive connection between the circuit board and the replaceable medicine cartridge, it is possible to achieve a reduction in weight and size, which is very beneficial.
JP 2002-100431 A JP 2004-350971 A

  However, since the conventional pressure contact type connector is configured without the premise of adhesion of water drops such as medicines, when it is used as it is for the conductive connection between the circuit board of the transpulmonary medication apparatus and the cartridge, it is conductive. There is a big problem that water drops enter between the body pin of the pin and the movable pin, causing corrosion, an increase in resistance value, and unstable connection.

  The present invention has been made in view of the above, and it is an object of the present invention to provide a drip-proof connector and a connection structure thereof that can prevent the ingress of water droplets and suppress corrosion, increase in resistance value, instability of connection, and the like. It is said.

In order to solve the above-described problems, the present invention includes a conductive pin that is built in a housing and that is exposed at both ends from both sides thereof, and a drip-proof cover that covers at least the exposed portion of the conductive pin that is exposed from the housing. There,
The conductive pin is a conductive hollow fuselage pin built in the housing, a conductive movable pin inserted into the fuselage pin so as to reciprocate and a tip portion protruding from the housing, and interposed between the fuselage pin and the movable pin. And a conductive spring member that urges the movable pin in a direction away from the body pin,
The drip-proof cover is formed in a substantially U-shaped cross section that can be elastically deformed.

In addition, either one of the opposing surfaces of the body pin and the movable pin of the conductive pin is inclined with respect to the reciprocating direction of the movable pin, and the distal end surface of the movable pin is formed into a substantially flat surface or a substantially semicircular cross section. can do.
Moreover, it is preferable to form a fitting groove that fits with the flat portion of the drip-proof cover on the peripheral surface of the movable pin of the conductive pin.

Moreover, either a conductive elastomer or a conductive thin wire can be attached to the tip of the movable pin and exposed from the flat portion of the drip-proof cover.
In addition, the drip-proof cover can incorporate an elastomer that supports the load.
Moreover, the flange which contacts a housing can be formed in the free end part of a drip-proof cover.

It is also possible to form a locked portion on the peripheral surface of the housing and to form a locking portion that engages with the locked portion of the housing on the flange of the drip-proof cover.
Moreover, it is good to include the holding | suppressing hollow body detachably fitted to the drip-proof cover and supported by the flange of the drip-proof cover.
Further, it is possible to form a concave portion on one of the flange of the drip-proof cover and the facing surface of the holding hollow body, and a convex portion that fits the concave portion on the other.

  Furthermore, in the present invention, in order to solve the above-mentioned problem, the drip-proof connector according to any one of claims 1 to 9 is interposed between the electrodes of a plurality of opposing electrical joints. It is said.

  Here, the housing, the conductive pin, and the drip-proof cover in the claims are not particularly limited to a plurality. The housing is not particularly limited to a plate shape, a block shape, a cylindrical shape or the like. The drip-proof cover can be formed into a U-shaped cross-section using an elastically deformable elastomer or sheet, or a cap shape similar to this, a bottomed cylindrical shape, or the like. The body pin of the conductive pin may be a hollow bottomed cylindrical shape, a hollow convex shape, or the like. Moreover, the movable pin may penetrate the flat part of a drip-proof cover, and may not be so.

  The restraining hollow body can be formed in a ring shape or a frame shape. In addition, the electrical joint includes at least a printed circuit board, a flexible substrate, a medical component, a liquid crystal component, an acoustic component, a small motor, a communication component, and the like. Further, the drip-proof connector is mainly used for electrical connection between the circuit board of the transpulmonary medication apparatus and the drug cartridge, but is not limited thereto. For example, you may use for the connection of the electrical junction of a camera, a mobile telephone, and a toy, and the connection of electrical junctions to which adhesion of a water droplet is hardly considered.

According to the present invention, when a plurality of electrical joints are electrically connected, the body pin of the conductive pin of the drip-proof connector is connected to the electrode of the electrical joint, and the movable pin of the conductive pin and another electrical joint are connected. If the electrodes are brought into contact with each other, a plurality of electrical junctions can be connected.
At this time, the movable pin of the drip-proof connector reciprocates in response to contact with another electrical joint, and the drip-proof cover is deformed accordingly. Further, the drip-proof cover having the waterproof function suppresses liquid from entering between at least the body pin of the conductive pin and the movable pin.

According to the present invention, there is an effect that water droplets can be prevented from entering and corrosion, increase in resistance value, connection instability, and the like can be suppressed.
In addition, if a fitting groove that fits with the flat part of the drip-proof cover is formed on the peripheral surface of the movable pin of the conductive pin, when the movable pin protrudes through the drip-proof cover, It is possible to suppress the fluid entry path between the two.
Further, if a flange that contacts the housing is formed at the free end of the drip-proof cover, it is possible to prevent the drip-proof cover on the housing from being inclined and deteriorating its posture due to an increase in the contact area.

In addition, if the flange of the drip-proof cover is held down by the holding hollow body, it is possible to suppress the intrusion of liquid or water droplets from the gap between the housing and the drip-proof cover.
Furthermore, if a concave portion is formed on one of the flange of the drip-proof cover and the opposing surface of the holding hollow body, and a convex portion that fits the concave portion is formed on the other side, the load of the holding hollow body is formed by the convex portion and the concave portion. It is possible to suppress the electrical joint from being damaged by reducing. Furthermore, there is an effect that a sealing function can be obtained by the engagement of the convex portion and the concave portion.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. A drip-proof connector according to this embodiment is built in a resin housing 1 and the housing 1 as shown in FIGS. A plurality of conductive pins 10 whose both ends are exposed from both the front and back surfaces, an elastically deformable drip-proof cover 20 that covers at least the exposed portions of the plurality of conductive pins 10 exposed from the surface of the housing 1, and A holding frame 30 fitted to the drop cover 20, and is sandwiched between electrodes of a replaceable medicine cartridge 50 and a circuit board 40 of the transpulmonary medication apparatus, and functions to electrically connect them. .

  As shown in FIGS. 1 to 6, the housing 1 is basically formed into a flat plate having a substantially rectangular plane using a predetermined resin, and a plurality of through-holes 2 extending in the longitudinal direction are spaced apart. The bosses 3 that are perforated in a row and that exhibit a guiding function and a reinforcing function are integrally formed on the peripheral edge of the surface of each mounting hole 2.

  Examples of the predetermined resin for the housing 1 include general-purpose engineering plastics excellent in heat resistance, dimensional stability, and moldability, specifically, polyphenylene sulfide, liquid crystal polymer, polyamide 9T, modified polyamide 6T, polypropylene, polycarbonate, and the like. It is done. Among these, polyphenylene sulfide which is excellent in impact resistance, water resistance and acid resistance is optimal.

  As shown in FIG. 5 and FIG. 6, each conductive pin 10 is inserted into a hollow body pin 11 that is press-fitted into the mounting hole 2 of the housing 1, and is inserted into the body pin 11 so as to be able to reciprocate. And a coil spring 17 interposed between the inner bottom surface of the body pin 11 and the bottom surface of the movable pin 12.

  The body pin 11 and the movable pin 12 of the conductive pin 10 are manufactured using a nickel-plated or gold-plated conductive material such as copper, brass, or aluminum. The coil spring 17 is manufactured using metal wires such as phosphor bronze, beryllium copper, spring steel, and piano wire, or fine metal wires obtained by subjecting these metal wires to nickel plating or gold plating.

  The body pin 11 is formed in a bottomed cylindrical shape having a substantially U-shaped cross section, and a flat bottom portion which is an end portion is exposed to be aligned with the back surface of the housing 1, and the bottom portion is an electrode on the circuit board 40. Conductive connection is made via solder.

  The movable pin 12 is formed in a solid convex shape including a disc portion 13 slidably contacting the inner peripheral surface of the body pin 11 and a cylindrical pin portion 14 rising from the disc portion 13. A pin portion 14 having a smaller diameter than the disc portion 13 passes through the boss 3 and protrudes upward from the surface of the housing 1, and the tip portion 15 of the pin portion 14 elastically contacts the electrode of the cartridge 50 as an electrode. To do.

  The movable pin 12 is formed such that the bottom surface of the disc portion 13 facing the flat inner bottom surface of the body pin 11 is inclined at an angle of 10 to 30 °, preferably about 15 ° with respect to the reciprocating direction. A fitting groove 16 that fits into the drip-proof cover 20 is notched endlessly on the peripheral surface, and the tip surface of the tip portion 15 of the pin portion 14 is formed in a substantially semicircular shape with a small curvature.

  The coil spring 17 is fitted into the body pin 11 and functions to elastically bias the movable pin 12 in a direction separating the body pin 11 from the body pin 11, in other words, in a surface direction of the housing 1 (upward in FIG. 1).

  As shown in FIGS. 2 to 6, the drip-proof cover 20 is opposed to a large portion of the surface of the housing 1 with a gap, and has a substantially rectangular flat portion 21 that penetrates the movable pin 12 of the conductive pin 10. The flat surface 21 is formed in a substantially U-shape with a shallow horizontal cross section with a short vertical wall 22 extending from the peripheral edge of the flat portion 21 to the surface of the housing 1, in other words, extending downward. At the end, a flat frame-shaped flange 23 that is laminated and bonded to the peripheral edge of the surface of the housing 1 is formed horizontally outward.

  The drip-proof cover 20 is formed using a predetermined elastomer made of, for example, silicone rubber, fluorine rubber or the like having excellent chemical resistance, weather resistance, etc., and the movable pin 12 is fitted in the longitudinal direction of the flat portion 21. A plurality of through holes 24 tightly fitted in the joint groove 16 are formed in a row at intervals. When the drip-proof cover 20 is formed of silicone rubber, the drip-proof cover 20 has a hardness of 10 to 70 ° Hs, preferably 20 to 50 ° Hs, and the through hole 24 has a smaller diameter than that of the movable pin 12 so as to be in close contact therewith. Perforated.

  As shown in FIGS. 1, 2, and 6, the holding frame 30 is formed into a flat frame plate having a substantially rectangular plane larger than the surface of the housing 1 and the drip-proof cover 20 using a predetermined material, The hollow portion is tightly detachably fitted to the drip-proof cover 20 from the outside, and is horizontally mounted and supported on the flat flange 23 of the drip-proof cover 20, so that it is aligned with the surface of the flat portion 21 of the drip-proof cover 20. It functions to prevent water droplets from entering the inside of the housing 1.

  The predetermined material of the holding frame 30 is a general-purpose engineering plastic excellent in heat resistance, dimensional stability, and moldability, specifically, ABS resin, polycarbonate, polypropylene, vinyl chloride resin, polyethylene, stainless steel, and the like. can give.

  In the above, when the circuit board 40 of the transpulmonary medication apparatus and the cartridge 50 are electrically connected, first, the body pins 11 of the drip-proof connector are mounted on the electrodes of the circuit board 40 by solder, and the drip-proof of the drip-proof connector The circuit board 40 and the cartridge 50 can be electrically connected by press-fitting the holding frame 30 to the cover 20 and then press-fitting the electrode of the cartridge 50 onto the movable pin 12 of the drip-proof connector from above. .

  At this time, the movable pin 12 protruding from the drip-proof cover 20 of the drip-proof connector reciprocates while compressing the coil spring 17 according to the contact with the cartridge 50, and accordingly, the flat portion 21 of the drip-proof cover 20 is moved. Deforms following the reciprocating direction.

  According to the above, the drip-proof cover 20 having a waterproof function covers most of the plurality of conductive pins 10 other than the tip portions, and water drops made of a drug are between the body pins 11 and the movable pins 12 of the conductive pins 10. Since the intrusion is suppressed and prevented, there is no possibility that the conductive pin 10 is corroded, the resistance value is increased, and the connection is unstable. Further, the tip surface of the tip portion 15 of the movable pin 12 is formed in an arc shape, the bottom surface of the movable pin 12 is inclined at an angle of 10 to 30 °, and the coil spring 17 is pressed against the bottom surface of the body pin 11. Since the inner peripheral surface and the peripheral surface of the movable pin 12 are brought into contact with each other, the contact can be ensured and extremely good conductivity and low resistance can be obtained.

  In addition, since the bottom surface of the movable pin 12 is not inclined at an angle of less than 10 °, the inner peripheral surface of the body pin 11 and the movable pin 12 can be reliably brought into contact with each other. Moreover, since the bottom surface of the movable pin 12 is not inclined at an angle exceeding 30 °, the sliding of the movable pin 12 is not hindered. Further, since the tip surface of the tip portion 15 of the movable pin 12 is not pointed and has a substantially semicircular cross section that can be expected to increase the contact area, even if the electrode of the cartridge 50 is small, non-contact and displacement are prevented. It becomes possible.

  Further, since the fitting groove 16 of the movable pin 12 and the through hole 24 of the drip-proof cover 20 are closely fitted without any gap, it is possible to effectively suppress and prevent water droplets from entering between the movable pin 12 and the drip-proof cover 20. It becomes possible to do. Further, since the holding frame 30 firmly holds the flange 23 around the drip-proof cover 20, it is possible to prevent a gap from being formed between the housing 1 and the drip-proof cover 20. 10 and water droplets can be effectively prevented from entering the conducting portion of the transpulmonary medication apparatus.

  Furthermore, since the restraining frame body 30 is horizontally mounted and supported on the flange 23 of the drip-proof cover 20, stabilization of the posture of the restraining frame body 30 can be greatly expected. Furthermore, since the drip-proof cover 20 is made of an elastically deformable elastomer, a good click feeling can be greatly expected.

  Next, FIG. 7 shows a second embodiment of the present invention. In this case, the movable pin 12 of the conductive pin 10 is formed to be shorter than the flat portion 21 of the drip-proof cover 20 and has a flat tip. A disc-shaped conductive elastomer 18 functioning as an electrode is bonded to the tip surface of the portion 15, and the conductive elastomer 18 is fitted into the through hole 24 of the drip-proof cover 20 and exposed from the surface of the flat portion 21 of the drip-proof cover 20. I try to let them. The other parts are the same as those in the above embodiment, and the description thereof is omitted.

  In this embodiment, the same effect as that of the above embodiment can be expected. In addition, the configuration of the conductive pin 10 and the drip-proof cover 20 can be diversified, and the fitting groove 16 can be omitted from the peripheral surface of the movable pin 12. It is clear that the configuration can be simplified.

  Next, FIG. 8 shows a third embodiment of the present invention. In this case, a flat substantially frame-shaped locked portion 4 is formed to protrude on the entire peripheral surface of the housing 1, and the drip-proof cover 20. A locking portion 25 having a substantially L-shaped cross section that extends downward and is detachably fitted and locked to the locked portion 4 of the housing 1 is integrally formed to be bent. The other parts are the same as those in the above embodiment, and the description thereof is omitted.

  In this embodiment, the same effect as that of the above embodiment can be expected, and water droplets enter the inside of the drip-proof cover 20 due to the locking of the locked portions 4 and the locking portions 25 facing each other. Obviously, it is possible to effectively suppress and prevent the above.

Next, FIG. 9 shows a fourth embodiment of the present invention. In this case, instead of mounting a single large drip-proof cover 20 on the surface of the housing 1, a plurality of drip-proof covers 20A are provided. Are arranged in a horizontal row so that each drip-proof cover 20A covers at least an exposed portion of the conductive pin 10 exposed from the surface of the housing 1.
The drip-proof cover 20 </ b> A is formed in a cap shape having a substantially U-shaped cross section, and a flange 23 that overlaps the surface of the housing 1 is integrally formed outwardly at the free end of the vertical wall 22.

In this case, although not shown, the holding frame body 30 is formed by arranging a plurality of fitting holes that fit into the drip-proof cover 20A in a horizontal row on a plate that is detachably mounted on the surface of the housing 1. It is formed into a restrained hollow body. The other parts are the same as those in the above embodiment, and the description thereof is omitted.
In the present embodiment, it is obvious that the same effects as those of the above-described embodiment can be expected, and that the configuration of the drip-proof cover 20A and the holding frame 30 and the assembly can be diversified.

  Next, FIG. 10 shows a fifth embodiment of the present invention. In this case, a rib-like convex portion 26 is formed on the surface of the flange 23 of the drip-proof cover 20A so as to protrude into a flat frame shape, and the restraining frame. A recess 31 is cut out in the shape of a plane frame on the lower surface of the body 30 so that the protrusion 26 and the recess 31 are closely fitted to each other. The other parts are the same as those in the above embodiment, and the description thereof is omitted.

  In the present embodiment, the same effects as those of the above embodiment can be expected. Moreover, when the frame 30 is pressed against the flange 23 of the drip-proof cover 20, the bottom surface of the frame 30 is held by the flange 23 of the drip-proof cover 20A. The contact of the convex portion 26 and the concave portion 31 having a small contact area is not brought into contact, but the load of the holding frame 30 is reduced and dispersed, and the circuit board 40 and the electrode of the cartridge 50 are damaged. It is clear that it can be suppressed. Further, since the elastically deformable convex portion 26 and the concave portion 31 mesh with each other and function as a seal gasket, further improvement in the drip-proof function can be expected.

Next, FIG. 11 shows a sixth embodiment of the present invention. In this case, the housing 1 is formed not in a large plate shape but in a small cylindrical shape to incorporate a single conductive pin 10. A single drip-proof cover 20A having a substantially U-shaped cross section is bonded to the surface of the housing 1, and a substantially cylindrical load supporting elastomer 27 is incorporated therein.
The drip-proof cover 20A is formed into a cap shape having a substantially U-shaped cross section, and the flange 23 is omitted. The other parts are the same as those in the above embodiment, and the description thereof is omitted.

  Also in this embodiment, the same effect as the above embodiment can be expected, and the load supporting elastomer 27 having a repulsive force prevents the drip-proof cover 20A from being recessed more than necessary or preventing the drip-proof cover 20A from being restored while being recessed. Obviously you can. Further, the flange 23 and the holding frame 30 can be omitted, and the configuration can be simplified and the number of parts can be reduced.

  Next, FIGS. 12 and 13 show a seventh embodiment of the present invention. In this case, the housing 1 is divided into cylindrical first and second housings 1A and 1B. A single conductive pin 10 is built in each of the second housings 1A and 1B, and the conductive pin 10 of the first housing 1A and the conductive pin 10 of the second housing 1B are electrically connected through the bottom of the body pin 11. The movable pins 12 of the conductive pins 10 in the first and second housings 1A and 1B are respectively covered with the drip-proof cover 20A. The other parts are the same as those in the above embodiment, and the description thereof is omitted.

  In this embodiment, the same effects as those of the above embodiment can be expected, and it is clear that the configuration of the housing 1 can be diversified and the drip-proof connector can be downsized.

  In the above embodiment, the plurality of conductive pins 10 are arranged in the housing 1 in 1 × 3, but the present invention is not limited to this. For example, the plurality of conductive pins 10 may be arranged in 1 × 5, 2 × 2, 2 × 3, 3 × 2, 3 × 3, or the like. The boss 3 may be appropriately formed in a hollow convex shape, ring shape, cylinder shape, frame shape, or the like. In the above embodiment, the bottom surface of the disc portion 13 of the movable pin 12 is inclined. However, the inner bottom surface of the body pin 11 may be inclined with respect to the reciprocating direction of the movable pin 12.

  In addition, a leaf spring or the like can be used in place of the coil spring 17 if it does not hinder use. Further, a necessary number of fine metal wires such as wires are bonded to the tip surface of the tip portion 15 of the movable pin 12, and the fine metal wires are fitted into the through holes 24 of the drip-proof cover 20 from the surface of the flat portion 21 of the drip-proof cover 20. It can also be exposed. Furthermore, the load supporting elastomer 27 can be increased or decreased.

It is a whole perspective explanatory view showing typically an embodiment of a drip-proof connector concerning the present invention. 1 is an exploded perspective view schematically showing an embodiment of a drip-proof connector according to the present invention. It is a perspective explanatory view showing typically the state where the control frame in the embodiment of the drip-proof connector concerning the present invention was removed. FIG. 4 is a perspective explanatory view schematically showing a state in which a drip-proof cover is removed from the drip-proof connector of FIG. 3. It is principal part sectional explanatory drawing which shows typically the state which removed the restraining frame in embodiment of the drip-proof connector which concerns on this invention. It is a partial section explanatory view showing typically an embodiment of a drip-proof connector concerning the present invention, and its connection structure. It is a fragmentary sectional view showing typically a 2nd embodiment of a drip-proof connector concerning the present invention, and its connection structure. It is a perspective section explanatory view showing typically a 3rd embodiment of a drip-proof connector concerning the present invention, and its connection structure. It is a perspective explanatory view showing typically a 4th embodiment of a drip-proof connector concerning the present invention, and its connection structure. FIG. 10 is a partial cross-sectional explanatory view schematically showing a fifth embodiment of the drip-proof connector and the connection structure thereof according to the present invention. It is a fragmentary sectional view showing typically a 6th embodiment of a drip-proof connector concerning the present invention, and its connection structure. It is explanatory drawing which shows typically 7th Embodiment of the drip-proof connector which concerns on this invention, and its connection structure. It is a decomposition explanatory view showing typically a 7th embodiment of a drip-proof connector concerning the present invention, and its connection structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing 1A 1st housing 1B 2nd housing 4 Locked part 10 Conductive pin 11 Body pin 12 Movable pin 13 Disc part 14 Pin part 15 Tip part 16 Fitting groove 17 Coil spring (spring member)
18 conductive elastomer 20 drip-proof cover 20A drip-proof cover 21 flat part 23 flange 24 through-hole 25 locking part 26 convex part 27 load-supporting elastomer (elastomer supporting load)
30 Restraining frame (restraining hollow body)
31 Concave 40 Circuit board (electrical joint)
50 cartridge (electrical joint)

Claims (10)

A drip-proof connector comprising a conductive pin incorporated in a housing and exposed at both ends from both sides thereof, and a drip-proof cover covering at least an exposed portion of the conductive pin exposed from the housing,
The conductive pin is a conductive hollow fuselage pin built in the housing, a conductive movable pin inserted into the fuselage pin so as to reciprocate and a tip portion protruding from the housing, and interposed between the fuselage pin and the movable pin. And a conductive spring member that urges the movable pin in a direction away from the body pin,
A drip-proof connector, wherein the drip-proof cover is formed in a substantially U-shaped cross section that can be elastically deformed.   Any one of the opposing surfaces of the body pin and the movable pin of the conductive pin is inclined with respect to the reciprocating direction of the movable pin, and the distal end surface of the movable pin is formed into a substantially flat surface or a substantially semicircular cross section. Item 2. A drip-proof connector according to item 1.   The drip-proof connector according to claim 1 or 2, wherein a fitting groove that fits with the flat portion of the drip-proof cover is formed on the peripheral surface of the movable pin of the conductive pin.   The drip-proof connector according to claim 1, wherein either one of a conductive elastomer and a fine conductive wire is attached to the tip of the movable pin so as to be exposed from the flat portion of the drip-proof cover.   The drip-proof connector according to any one of claims 1 to 4, wherein an elastomer that supports a load is incorporated in the drip-proof cover.   The drip-proof connector according to claim 1, wherein a flange that contacts the housing is formed at a free end portion of the drip-proof cover.   The drip-proof connector according to claim 6, wherein a locked portion is formed on the peripheral surface of the housing, and a locking portion that engages with the locked portion of the housing is formed on the flange of the drip-proof cover.   The drip-proof connector according to claim 6 or 7, comprising a holding hollow body that is detachably fitted to the drip-proof cover and is supported by a flange of the drip-proof cover.   9. The drip-proof connector according to claim 8, wherein a concave portion is formed on one of the facing surface of the flange of the drip-proof cover and the holding hollow body, and a convex portion that fits the concave portion is formed on the other. A connection structure for a drip-proof connector, wherein the drip-proof connector according to any one of claims 1 to 9 is interposed between electrodes of a plurality of opposing electrical joints.

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