JPH08138793A - Drip-proof type pin connector - Google Patents

Abstract

PURPOSE: To effectively prevent water droplets from entering a holder by which a terminal is removably held, without sacrificing the performance of the terminal pin in going out of the holder, i.e., the controllability of the terminal pin, in a dripproof pin connector for use in charging and discharging a battery power source. CONSTITUTION: A terminal pin 3 energized in a projecting direction by a coil spring 6 is enclosed in a holder 1. Rubber packing 4 is secured to the terminal pin 3, and a rubber lid 5 is mounted on the holder 1, so that the packing 4 is intimately contacted with the shaft portion 31 of the terminal pin 3 with the outer peripheral surface of the lid 5 intimately contacted with the inner peripheral surface of the holder 1. The cylindrical portion 42 of the packing 4 is fitted into the space between the boss portion 51 of the lid 5 and the holder 1 to form a meandering gap in that portion that keeps water droplets out.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a drip-proof pin connector.

[0002]

2. Description of the Related Art A conventional pin connector used for charging and discharging a battery is described in Japanese Utility Model Laid-Open No. 63-25467. This is one in which a terminal pin is held in a bottomed cylindrical holder so that it can be pulled out and retracted, and the terminal pin is constantly urged in the protruding direction by the elastic force of a coil spring built in the holder. Is slidably inserted into a hole provided at one end of the holder.

On the other hand, various electric devices such as portable telephones and video tape recorders that can be carried and use a charge / discharge type battery as a power source are recently required to have a drip-proof (waterproof) specification. In many cases, therefore, drip-proof type connectors have also been required for pin connectors.

[0004]

However, the conventional pin connector described in the above publication does not take any drip-proof measure.

The present invention has been made in view of the above circumstances, and holds the terminal pin in a retractable manner without sacrificing the withdrawal performance of the terminal pin with respect to the holder, that is, the operability of the terminal pin. It is an object of the present invention to provide a drip-proof pin connector that can effectively prevent water droplets from entering the holder.

Another object of the present invention is to provide a drip-proof type pin connector which can maintain the watertightness of its mounting portion when it is mounted on a device or a battery.

[0007]

According to a first aspect of the present invention, there is provided a drip-proof type pin connector in which a metal terminal pin is retracted from a holder having a cylindrical shape with a bottom in a protruding direction. In the pin connector which is held as possible, a boss having a through hole is provided with a rubber lid body provided at one end with a flange larger than the outer diameter of the boss, and a hole is provided in the center. And a packing material made of rubber having a tubular portion protruding from the outer periphery of the bottom plate portion, the collar portion of the lid body being attached to one end opening edge portion of the holder, and the outer peripheral surface of the collar portion being the opening edge portion. The terminal pin is slidably inserted into the through hole of the boss portion of the lid, and the terminal pin is press-fitted into the hole of the packing material slidably accommodated in the holder. The terminal pin and the packing material are joined together, and the boss and the holder are The space between the inner circumferential surface of the cylindrical portion of the packing material is rush, is that.

A drip-proof pin connector according to a second aspect of the present invention is the electrical connector according to the first aspect, wherein the holder is made of metal and is interposed between the terminal pin and the bottom of the holder in a compressed state. The terminal pin is always elastically biased in the protruding direction by the coil spring.

A drip-proof type pin connector according to a third aspect of the present invention is the one according to the second aspect, wherein a stepped annular lid receiving surface is provided at an opening edge portion of one end of the holder, and the lid receiving surface has a lid body. The outer peripheral portion of the collar portion is overlapped, and the outer peripheral portion of the collar portion is pressed between the annular bent piece portion formed by bending the opening edge portion inward and the lid receiving surface. It has been done.

A drip-proof pin connector according to a fourth aspect of the present invention is the one according to the second or third aspect, wherein the coil spring is attached to the end face of the boss portion of the lid when no load is applied to the terminal pin. It is configured such that the inner surface of the bottom plate portion of the packing material is pressed into contact with the elastic force of and the protruding position of the terminal pin is regulated.

According to a fifth aspect of the present invention, there is provided a drip-proof type pin connector according to the fourth aspect, wherein the terminal pin is provided with a brim-shaped support plate portion which overlaps an outer surface of the bottom plate portion of the packing material. , Is.

According to a sixth aspect of the present invention, there is provided a drip-proof pin connector according to the fourth or fifth aspect, wherein the inner surface of the bottom plate portion of the packing material is pressed against the end surface of the boss portion of the lid. In the full stroke range between the protruding position of the terminal pin and the retracted position when a load is applied to the terminal pin and the terminal pin moves to the retracted limit, the inner circumference of the boss and the holder The axial lengths of the boss portion and the tubular portion are determined so that the tubular portion of the packing material projects into the space between the surfaces.

The drip-proof pin connector of the invention according to claim 7 is the holder according to any one of claim 1, claim 2, claim 3, claim 4, claim 5, and claim 6, A collar-shaped mounting portion having a diameter larger than the outer peripheral diameter of the holder is integrally provided at the axially intermediate portion of the holder, and one end portion of the holder is projected from the mounting portion, and the protruding portion is the mounted body. And a ring-shaped groove into which the cylindrical protrusion provided in the mounted body is fitted, is provided in the mounting portion. is there.

[0014]

According to the first aspect of the invention, at the one-end opening edge of the bottomed cylindrical holder on which the flange of the rubber lid is mounted, the outer peripheral surface of the flange of the lid is the above-mentioned opening. Watertightness is maintained by closely adhering to the inner peripheral surface of the edge. Similarly, at the joint between the terminal pin and the packing material, the hole of the packing material is in close contact with the terminal pin to maintain watertightness. On the other hand, between the boss portion of the lid and the terminal pin inserted in the through hole of the boss portion, between the boss portion and the tubular portion of the packing material, and between the packing material and the inner peripheral surface of the holder. , In connection with the fact that the terminal pin's withdrawal / removal performance must be ensured, there may be gaps that cannot completely maintain watertightness.
The gaps are connected in a meandering manner by the cylindrical portion of the packing material protruding into the space between the boss portion of the lid and the inner peripheral surface of the holder, so that water droplets of the holder pass through these gaps. It is extremely unlikely that it will get inside. Further, according to the invention of claim 6, since the gap which is continuously connected in a meandering shape is ensured in the entire stroke range of the terminal pin, even when the terminal pin is retracted into the holder, it is possible to pass through the gap. It is unlikely that water will get inside the holder.

Further, according to the third aspect of the invention, the one end opening edge portion of the bottomed cylindrical holder to which the flange portion of the rubber lid body is mounted is folded to the stepped annular lid receiving surface. Since the outer peripheral portion of the collar portion of the lid is pressed by the bent piece portion,
Together with the outer peripheral surface of the flange portion being in close contact with the inner peripheral surface of the opening edge portion, a higher degree of watertightness is maintained.

According to the fourth aspect of the present invention, when no load is applied to the terminal pin, that is, when the pin connector is not used, the above-described meandering gap is formed in the boss portion of the lid. The end face and the inner surface of the bottom plate portion of the packing material are pressure-contacted to each other so as to be watertight. Therefore, there is no passage for water droplets to penetrate into the holder.
In this case, in particular, according to the invention as claimed in claim 5, since the bottom plate portion of the packing material is backed up by the brim-shaped support plate portion provided on the terminal pin, the action of blocking the gap that is continuous in a meandering shape is surely performed. To be demonstrated.

According to the invention of claim 7, when the drip-proof pin connector is attached to the body to be attached, the protrusion of the body to be attached and the attachment in which the protrusion is fitted are attached at the attachment points. Since the gap inevitably formed between the groove portion and the groove portion is U-shaped, it is difficult for water droplets to penetrate into the inside of the mounted body from the mounting portion.

According to the second aspect of the invention, the terminal pin and the holder are surely electrically connected by the coil spring.

[0019]

1 is a front view of a drip-proof pin connector according to an embodiment of the present invention, FIG. 2 is a plan view of the connector, and FIG. 3 is a plan view of the connector mounted on a mounted body 100 when not in use. FIG. 4 is a vertical cross-sectional view of the same connector mounted on the mounted body 100 in a use state, and FIG. 5 is an enlarged vertical cross-sectional view of a main part of FIG.

The holder 1 of this drip-proof type pin connector is made of metal and is formed into a cylindrical shape with a bottom, and a projection 12 for inserting into a bottom portion 11 of the holder 1 is provided in a hole portion on the wiring board (not shown) side. Is provided. The protrusion 12 can be used as a terminal for soldering to the wiring board. Further, a collar-shaped mounting portion 2 having a diameter larger than the outer peripheral diameter of the holder 1 (that is, the body portion 13) is provided at an axially middle portion of the holder 1, specifically, an axial middle portion of the cylindrical body portion 13. The mounting portion 2 is integrally provided with an annular groove portion 21.
One end of the holder 1 is slightly projected from the mounting portion 2, and the projecting portion is denoted by reference numeral 14. Further, as can be seen in FIG. 5, the holder 1 (ie the body 1
3) A stepped annular lid receiving surface 15 is provided at one end opening edge.

The terminal pin 3 is made of metal and has a shaft portion 31 and a collar-shaped support plate portion 32 provided on the base portion of the shaft portion 31, and the outer diameter of the support plate portion 32 is as described above. It is slightly smaller than the inner diameter of the body 13 of the holder 1.

Reference numeral 4 denotes a rubber packing material, which is a disk-shaped bottom plate portion 41 and a cylindrical portion 42 protruding from the outer periphery of the bottom plate portion 41.
And a hole portion 43 having a diameter slightly smaller than the outer diameter of the shaft portion 31 of the terminal pin 3 is provided at the center of the bottom plate portion 41. In this packing material 4, the bottom plate portion 41
The shaft portion 31 of the terminal pin 3 is press-fitted into the hole portion 43 of the terminal pin 3 so that the terminal pin 3 and the packing material 4 are coupled, and
The support plate portion 32 of the terminal pin 3 overlaps the outer surface 44 of the bottom plate portion 41 of the packing material 4. The outer diameter of the packing material 4 is substantially the same as the outer diameter of the support plate portion 32 of the terminal pin 3, and is slightly smaller than the inner diameter of the body portion 13 of the holder 1.

The lid 5 is made of rubber, and has a disk-shaped flange 53 having a diameter larger than the outer diameter of the boss 51 at one end of the boss 51 having the through hole 52.

Reference numeral 6 is a coil spring, and this coil spring 6
Is made of a conductor such as metal.

As shown in FIGS. 3 and 4, the support plate portion 32 of the terminal pin 3 connected to the packing material 4 is attached to the holder 1.
The coil spring 6 is accommodated in the body portion 13 of the holder 1 so as to be retractable and retractable, and the coil spring 6 is interposed between the support plate portion 32 and the bottom portion 11 of the holder 1. Further, the shaft portion 31 of the terminal pin 3 is slidably inserted into the through hole 52 of the boss portion 51 of the lid body 5. Then, the collar portion 53 of the lid 5 is attached to the holder 1
(That is, the body portion 13) is attached to one end opening edge portion.

Attachment point a of the lid 5 to the holder 1
(Refer to FIGS. 4 and 5) has the following specific configuration. That is, as shown in FIG. 5, the outer peripheral portion of the collar portion 5 is superposed on the lid receiving surface 15 at the opening edge portion at one end of the holder 1 (that is, the body portion 13), and the collar portion 53 is press-fitted into the opening edge portion. The outer peripheral surface 54 of the body is in close contact with the inner peripheral surface 16 of the opening edge portion of the body portion 13. In this state, the opening edge portion of the body portion 13 is bent inward, and an annular shape formed by the bending is formed. The lid 5 is provided between the bent piece portion 17 and the lid receiving surface 15.
The outer peripheral portion of the collar portion 53 is pressed.

With the above structure, the coil spring 6 is compressed in the state where the lid 5 is attached to the holder 1, and the terminal pin 3 is always elastically ejected in the protruding direction by the force of the coil spring 6 to restore. It is energized. The tubular portion 42 of the packing material 4 projects into the space between the boss portion 51 of the lid 5 and the inner peripheral surface of the holder 1 (that is, the body portion 13).

Here, as shown in FIG. 5, a gap A is secured between the shaft portion 31 of the terminal pin 3 and the boss portion 51 of the lid body 5, and the boss portion 51 of the lid body 5 and the packing material 4 are secured. A gap B is secured between the tubular portion 42 and the supporting plate portion 32 of the terminal pin 3 and the inner peripheral surface of the body portion 13. These gaps A, B, C are narrow gaps through which water droplets cannot freely pass, and the gap A is secured, so that the shaft portion of the terminal pin 3 is not attached to the boss portion 51 of the lid body 5. 31 is capable of sliding smoothly, and the gap B is ensured so that the tubular portion 42 can slide smoothly with respect to the boss portion 51.
Since the clearance C is ensured, the tubular portion 42 and the support plate portion 32 can slide smoothly with respect to the body portion 13. Therefore, the gaps A, B, and C are unavoidable when the terminal pin 3, the lid 5, and the packing material 4 are assembled as shown in FIGS. It can be said that it is a gap that occurs in.

In this embodiment, when the load on the terminal pin 3 is not applied, that is, when the drip-proof type pin connector is not used, the terminal pin 3 is not pushed in, and the spring of the coil spring 6 is elastic. When the terminal pin 3 is projected from the holder 1 due to the force, the coil spring 6 is applied to the end surface 55 of the boss portion 51 of the lid 5 as shown in FIGS.
The inner surface 45 of the bottom plate portion 41 of the packing material 4 is pressed by the elastic force of the above, and the protruding position of the terminal pin is regulated. In addition, the protruding position of the terminal pin 3 when the inner surface 45 of the bottom plate portion 41 of the packing material 4 is pressed against the end surface 55 of the boss portion 51 of the lid body 5 and the drip-proof pin connector is used. As shown in FIG. 4, the boss portion 51 has a full stroke range between the terminal pin 3 and the retracted position when the terminal pin 3 is moved to the retracted limit as shown in FIG. In the space S between the inner peripheral surface of the holder 1 (that is, the body portion 13) and the packing material 4
So that the tubular portion 42 of the
1 and the axial length of the tubular portion 42 are defined.

The drip-proof pin connector described above is shown in FIG.
And it is attached to the attached body 100 with the structure shown in FIG. The mounted body 100 is provided with a mounting hole 110, a cylindrical protrusion 120 is provided on the peripheral edge of the mounting hole 110 on the back surface side, and is provided at an appropriate position around the mounting hole 110 on the back surface side. Engaging claw 13 with elasticity
0 ... is provided. The attached body 100 corresponds to a battery casing, an outer panel of devices, and the like. The drip-proof pin connector fits the protruding portion 14 provided at one end of the holder 1 into the mounting hole 110, and
The mounting portion 2 of the holder 1 is mounted on the mounted body 100 by fitting and locking the mounting portion 2 into the plurality of engaging claws 130 by utilizing its elasticity. In this way, the protrusion 120 fits into the groove 21 of the mounting portion 2.

Next, the operation will be described.

In the above-mentioned drip-proof type pin connector, the metal terminal pin 3 and the metal holder 1 are surely electrically connected by the coil spring 6 made of a conductor.
Therefore, by pressing the counterpart electrode 150 shown by the phantom line in FIG. 4 against the tip of the shaft portion 31 of the terminal pin 3 and retracting the terminal pin 3 into the holder 1 against the elastic force of the coil spring 6. The charging path or discharging path (not shown) is closed to charge or discharge the battery (not shown). It is in use.

Next, at the attachment point a of the lid 5 to the holder 1, the outer peripheral surface 54 of the collar portion 53 of the lid 5 is
Is in close contact with the inner peripheral surface 16 of the opening edge portion, and the outer peripheral portion of the collar portion 53 is pinched by the lid receiving surface 15 and the bent piece portion 17, so that high watertightness is achieved. Is secured. In addition, the terminal pin 3 and the packing material 4 shown in FIG.
At the connecting point b with, the hole portion 43 of the packing material 4 press-fitted into the shaft portion 31 of the terminal pin 3 comes into close contact with the shaft portion 31, and a high degree of watertightness is maintained. On the other hand, the three gaps A, B and C described in FIG.
In addition to narrowing B and C so that water droplets cannot pass freely, the tubular portion 42 of the packing material 4 is provided between the boss portion 51 of the lid 5 and the inner peripheral surface of the body portion 13 of the holder 1. Space S
Since it is connected in a meandering shape by being rushed into (see FIG. 4), it is extremely unlikely that water droplets will penetrate into the holder 1 through the gaps A, B, and C. This action is exhibited in the entire stroke range of the terminal pin 3. Moreover, when the pin connector is not used, the gaps A, B, and C that are continuous in a meandering shape are water-tight by the pressure contact between the end surface 55 of the boss portion 51 of the lid 5 and the inner surface 45 of the bottom plate portion 41 of the packing material 4. Since there is no path for water droplets to be penetrated into the holder 1 by being blocked, the water droplets are reliably prevented from entering the holder 1. Furthermore, the support plate portion 32 of the terminal pin backs up the bottom plate portion 41 of the packing material 4 to prevent its deformation, so that intrusion of water droplets can be prevented more reliably.

In addition, at the mounting location between the drip-proof pin connector and the mounted body 100, which is indicated by reference numeral c in FIGS. 3 and 4, the protruding section 120 of the mounted body 100 and the protruding section 12 are attached.
The gap unavoidably formed between the annular groove 21 of the mounting portion 2 into which 0 is fitted has a U shape. This structure is a structure in which water droplets do not easily penetrate into the inside of the mounted body 100 from the mounting point c, and therefore it is difficult for water drops to enter the inside of the mounted body 100.

In this embodiment, when the pin connector is not used, the meandering gaps A, B and C are formed in the end surface 55 of the boss portion 51 of the lid 5 and the bottom plate portion 41 of the packing material 4. The pressure contact with the surface 45 prevents water from penetrating the inside of the holder 1 in a watertight manner so that the penetration path of water droplets can be eliminated. The gaps A, B, and C may be configured to be watertightly blocked by the pressure contact between the flange portion 53 of the lid 5 and the tubular portion 42 of the packing material 4.

[0036]

According to the first aspect of the invention, the watertightness is maintained at the place where the rubber lid is attached to the holder and the joint between the terminal pin and the packing material, and the boss portion of the lid is provided. The gaps formed inevitably formed between the terminal pins, between the boss and the tubular part of the packing material, and between the packing material and the inner peripheral surface of the holder are connected in a meandering manner, so that water droplets may pass through these gaps. It is extremely unlikely that the situation of entering the inside of the holder occurs, and as a result, the effect of effectively preventing the entry of water droplets into the inside of the holder without sacrificing the operability of the terminal pin is exhibited. According to the invention of claim 6, since a gap that is continuous in a meandering shape is always secured in the entire stroke range of the terminal pin, the drip-proof pin connector is in use (in a state where the terminal pin is pushed in).
The above-mentioned effect is surely exhibited regardless of whether or not it is in use (when the terminal pin is protruding).

According to the third aspect of the invention, there is an effect that a high degree of watertightness is maintained at the place where the lid is attached to the holder.

According to the inventions of claims 4 and 5,
In particular, high watertightness is maintained when the drip-proof pin connector is not used.

According to the invention of claim 7, there is an effect that it is easy to maintain the watertightness of the attachment point of the drip-proof type pin connector and the attached body.

According to the second aspect of the present invention, it is possible to obtain a drip-proof pin connector having high reliability of electrical contact between the terminal pin and the holder.

[Brief description of drawings]

FIG. 1 is a front view of a drip-proof pin connector according to an embodiment of the present invention.

FIG. 2 is a plan view of the connector.

FIG. 3 is a vertical cross-sectional view of the same connector attached to an attached body in a non-use state.

FIG. 4 is a vertical cross-sectional view of the same connector attached to an attached body in a use state.

5 is an enlarged vertical sectional view of a main part of FIG.

[Explanation of symbols]

 1 Holder 2 Mounting Part 3 Terminal Pin 4 Packing Material 5 Lid Body 6 Coil Spring 14 Projection Part 15 Lid Receiving Surface 16 Inner Surface of Opening Edge 17 Bending Piece 21 Groove 32 Support Plate 41 Bottom Plate 42 Cylindrical 43 Hole portion 44 Outer surface 45 Inner surface 51 Boss portion 52 Through hole 53 Collar portion 54 Collar portion outer peripheral surface 55 Boss end surface 100 Attached object 110 Mounting hole 120 Projection S S Between boss portion and inner peripheral surface of holder Space

Claims (7)

[Claims] 1. A pin connector in which a metal terminal pin is held in a cylindrical holder with a bottom so as to be able to move in and out in a state where it is always elastically urged in a protruding direction, and one end of a boss portion having a through hole A rubber lid provided with a flange portion having a diameter larger than the outer diameter of the boss portion, and a rubber packing material having a cylindrical portion protruding from the outer periphery of the bottom plate portion having a hole in the center The flange portion of the lid body is attached to the one end opening edge portion of the holder, the outer peripheral surface of the collar portion is in close contact with the inner peripheral surface of the opening edge portion, and in the through hole of the boss portion of the lid body. The terminal pin is slidably inserted, and the terminal pin is press-fitted into the hole of the packing material slidably accommodated in the holder so that the terminal pin and the packing material are coupled to each other and the boss portion and The tubular portion of the packing material is projected into the space between the inner peripheral surface of the holder. Drip-type pin connector, characterized in that there. 2. The holder is made of metal, and the terminal pin is constantly elastically urged in the protruding direction by a coil spring made of a conductor interposed in a compressed state between the terminal pin and the bottom of the holder. Item 1. A drip-proof pin connector according to item 1. 3. A stepped annular lid receiving surface is provided at one end opening edge of the holder, and an outer peripheral portion of a collar portion of the lid is superposed on the lid receiving surface, and the opening edge is inwardly formed. 3. The outer peripheral portion of the collar portion is clamped between the annular bent piece portion formed by being bent in the direction of the arrow and the lid receiving surface.
Drip-proof pin connector described. 4. When the load on the terminal pin is not applied, the inner surface of the bottom plate portion of the packing material is pressed against the end surface of the boss portion of the lid body by the elastic force of the coil spring to regulate the protruding position of the terminal pin. It is constituted so that it may be constituted.
Alternatively, the drip-proof pin connector according to claim 3. 5. The drip-proof pin connector according to claim 4, wherein the terminal pin is provided with a brim-shaped support plate portion that overlaps the outer surface of the bottom plate portion of the packing material. 6. The protruding position of the terminal pin when the inner surface of the bottom plate portion of the packing material is pressed against the end surface of the boss portion of the lid, and the terminal pin is retracted when a load is applied to the terminal pin. The boss so that the tubular portion of the packing material is inserted into the space between the boss portion and the inner peripheral surface of the holder in the entire stroke range between the retracted position and the retracted position. The drip-proof pin connector according to claim 4 or 5, wherein the axial lengths of the cylindrical portion and the cylindrical portion are defined. 7. A collar-shaped mounting portion having a diameter larger than the outer peripheral diameter of the holder is integrally provided at an axially intermediate portion of the holder, and one end portion of the holder projects from the mounting portion and The protruding portion can be fitted in a mounting hole provided in the mounted body, and the mounting portion is provided with an annular groove portion into which the cylindrical protruding portion provided in the mounted body is fitted. The drip-proof pin connector according to claim 1, claim 2, claim 3, claim 4, claim 5, or claim 6.