JPH086377Y2 - Waterproof electrical connector - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof type electrical connector, and more particularly to a multi-pin type waterproof type electrical connector suitable for relaying power supply between a power source mounted on transportation equipment and electrical equipment. In particular, it is possible to prevent a short circuit between the electric wires caused by water flowing in due to a capillary action or the like through a very small gap between the core wire of each electric wire and the insulating coating around the core wire. Regarding the improvement of.

[0002]

2. Description of the Related Art As is well known, a large number of relay electrical connectors are used between a power source mounted on transportation equipment and electrical equipment, or between electrical equipment. Although there are various performances required of these electrical connectors, waterproof performance is strongly demanded among them, and some improvements have been conventionally made on this waterproof performance.

One of them is that when a pin connector having a plurality of pin terminals and a socket having a plurality of contacts for connecting to the pin terminals are fitted to each other, water is flooded through a gap between the fitting surfaces. In order to prevent this, it is known that the sealing member is arranged over the entire fitting surface of the housing, that is, not around the individual pin terminals or contacts. For example, Jitsukai Sho 60-156678
There is a technique known in Japanese Patent Publication No. 58-186178. According to this, although it is possible to prevent water from seeping from the mating surface of the housings of each other, the capillary action passes through the minute gap between the core wire that constitutes each electric wire of the plurality of electric wires and the insulating coating around it. Due to this, there is a risk of short-circuiting between the multiple electric wires due to the inundation of the incoming water. This is because each electric wire, that is, the connection point between one contact and the pin terminal and the connection point between another contact adjacent to it and the pin terminal communicate with each other.

Another technique is disclosed in JP-A-61-918.
As seen in Japanese Patent Publication No. 86, a pin connector or socket having a seal member capable of directly sealing each of a plurality of electric wires has been proposed.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The technique described in Japanese Patent No. 886 can seal water entering between the housing and each electric wire by a seal member in the portion, and enables the above-mentioned sealing for each electric wire. However, the water that enters by capillary action into the connection part between the pin terminal and the contact through the very small gap between the core wire that constitutes each wire and the insulation coating causes the connection part between the pin terminal and the contact of each wire. There is a risk of short circuit between them. That is, in the case of the conventional technique disclosed in Japanese Patent Laid-Open No. 61-91886, if water infiltrates between the core wire of each electric wire and the insulating coating, the water reaches the connecting portion between the pin terminal and the contact. At this point, the wall of the housing is located around the connection part of this one pin terminal and the contact, but that one connection position communicates with the connection position of another adjacent pin terminal and contact. Since there is no seal member, water may infiltrate into the connecting portion between the pin and the contact which are adjacent to each other and may cause a short circuit between the electrodes.

Therefore, paying attention to the connection point between the pin terminal of each electric wire and the contact, the above-mentioned sealing member is arranged directly around the contact into which each pin terminal is inserted, and the connection point between the pin terminal and the contact of each electric wire. Although it is conceivable to seal each contact, each contact can be elastically deformed to generate an appropriate contact pressure to the pin terminal when each pin terminal is inserted. In reality, it is not possible to directly dispose the seal member around the circumference of.

In addition, there has been a demand for miniaturization of this type of electrical connector.

[0008]

[Purpose] Therefore, the main object of the present invention is to provide an electric connector having multiple pins and multiple contacts, in which each wire is configured to a connecting portion of the individual pins and contacts forming the multiple pins and multiple contacts group. Even when water is flooded through the core wire, it effectively prevents water from flooding the connection part of the adjacent pin and contact,
Another object of the present invention is to provide a protection type electrical connector capable of preventing electrical connection between pins forming a multi-contact group and contact connection points. More specifically, the core wire is connected to the connection point of one pin terminal and one contact without hindering the elastic displacement at the time of contact of each contact at the place to which each pin terminal of each electric wire is connected. SUMMARY OF THE INVENTION It is an object of the present invention to provide a means for effectively preventing the water, which is caused by the capillary action to pass through between the insulating coatings, from adhering to the connection points of the adjacent pin terminals and contacts.

Another object is to seal each part of the sealing surface by forming each insertion hole of the seal member around each contact accommodating cylinder wall surrounding the connection part of each pin terminal and contact with a circular cross section. Of the contact receiving cylinder wall and the plurality of insertion holes of the seal member are vertically arranged.
It is an object of the present invention to provide an electrical connector which is formed in a staggered arrangement of steps and has a plurality of contact cylindrical peripheral walls, whose height can be suppressed to a low level, and which can achieve the main purpose.

[0010]

In order to achieve the above object, the present invention has the following technical means. That is, this will be described with reference to the reference numerals in the accompanying drawings corresponding to the embodiment. The socket housing 9 has a plurality of contact receiving cylindrical walls 13a, 13
.. are integrally formed, and each of the plurality of contacts 10a, 10b ..., is individually accommodated in each of the contact accommodating cylinder walls 13a, 13b. The sockets 2 arranged, and the contact housing 5 has the contact housing cylindrical wall 13a of the socket 2,
.. is formed, and a tip 17 of the fitting recess 7 is disposed in the fitting recess 7 so as to face a bottom surface 18 of the fitting recess 7. Individual insertion holes 19a, 19b, 19c of the sealing member 14
.... Pin terminals 6a, 6b so that they are located in the inside
In the electrical connector including the pin connector 1 in which each of the ... Is arranged, when the pin connector 1 and the socket 2 are fitted, each insertion hole 19a of the seal member 14 in the fitting recess 7 The contact receiving cylinder walls 13a, 13b, ... Enter inside the contact receiving cylinder walls 13a, 13b ,. , 19b, 19c ...
.. are formed in close contact with each other, and the contact receiving cylindrical walls 13a, 13b ... Are formed in a circular cross section, and the circular contact receiving cylindrical walls 13a, 13b. .. Each of the insertion holes 19a, 19b, 19c of the seal member 14 that are in close contact with the outer peripheral surface 21 of.
······································· .. A plurality of the seal members 14 arranged in a staggered arrangement of two upper and lower rows in conformity with the staggered arrangement of two upper and lower rows, and through which the plurality of pin terminals 6a, 6b ... Insertion holes 19a, 19 of
b, 19c, ... Also the contact accommodating cylinder wall 13a,
The waterproof electrical connector is characterized by being arranged in a staggered arrangement of two upper and lower stages corresponding to the staggered arrangement of two upper and lower stages of 13b.

[0011]

According to the above construction, water invades due to a capillary action or the like through a very small gap between the core wire of the electric wire 11 and the insulating coating which are terminated to the contacts 10a and 10b in the socket housing 9. , The pin terminals 6a, 6b, ... And the contacts 10a, 10 connected to each other
Even if water is infiltrated at the connection position of b ..., the pin connector housing 5 and the socket housing 9 are fitted,
Each pin terminal 6a, 6b, ... And each contact 10a,
.. are connected, the contact accommodating cylinder walls 13a and 13b are provided so as to surround the respective connection points, and the seal members 14 are closely arranged around the contact accommodating cylinder walls 13a and 13b, respectively. When attention is paid to one pin terminal and contact, other pin terminals and contacts adjacent to the pin terminal are insulated from each other with the seal member 14 in between. Therefore, it is sealed that the water that has been temporarily submerged in the connection portion between one pin terminal and the contact is submerged in the connection portion between the pin terminal and the contact adjacent to it. That is, since the sealing member 14 seals each connection point, electrical connection is prevented. Further, the seal member 14 is not directly and closely arranged around each of the contacts 10a, 10b ..., And each of the contacts 10a, 10b. Since the above-mentioned action is achieved by being closely arranged around the cylindrical peripheral walls 13a and 13b, the elastic change at the time of connection of each contact of the counterpart to which each pin terminal is connected is not hindered.

Then, each contact accommodating tubular peripheral wall 13
a, 13b, ... Insertion holes 19a, 19b around the
19c ... Is circular, and the sealing surface 22 is the outer peripheral surface 2 of each contact accommodating tubular peripheral wall 13a, 13b.
Since it touches 1 evenly, the overall sealing property is good,
In addition, such contact accommodating tubular peripheral walls 13a, 13
.., and the contact-accommodating cylindrical peripheral walls 13a, 13b ..., because the insertion holes 19a, 19b, 19c .. The height of the entire electrical connector can be kept low.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 shows a pin connector 1 having multiple pin terminals, FIG. 2 shows a socket 2 having multiple contacts, and FIG. 3 shows a mating connection state of the pin connector 1 and the socket 2. In these figures, the pin terminal group and the contact group are arranged in a staggered manner in the upper and lower two steps, respectively, and therefore these sectional views are line segments along the staggered arrangement of the pin terminals or contacts. It is shown as a cut-away cross-section. Next, FIGS. 4 to 7 show only the seal member, and FIGS. 8 to 13 show only the seal stopper.

In these figures, first, the pin connector 1
The pin connector 1 includes a contact housing 5 and a plurality of pin terminals 6a, 6b, ... Attached to the connector housing 5. A socket fitting recess 7 is formed in the connector housing 5, and the tips 3 of the pin terminals 6a, 6b ... Moreover, a lock concave portion 8 with which the lock convex portion 12 of the socket housing can be engaged is formed on the outer peripheral surface of the front portion 4 of the connector housing 5. On the other hand, the socket 2 includes a socket housing 9 and a plurality of contacts 10a, 10b ...
.., each of the contacts 10a, 10b ...
An electric wire 11 is connected to each of.

Of course, each of these contacts 10a, 10b
... and the pin terminals 6a, 6b of the pin connector described above.
.. are arranged in a zigzag pattern on the upper and lower sides, and are arranged in the respective housings so that they can be connected to each other. In this example, the contacts 10a, 1
0b ... Each is shown as a so-called crimp type terminal.

The contact housing cylindrical walls 13a, 13b, ... Cylindrical to integrally surround the contacts 10a, 10b.
To form. Therefore, the contact accommodating cylinder walls 13a, 1
.. are also arranged in a staggered manner in the upper and lower two stages, and each of the contacts 10a, 10b .. .. is surrounded by the contact housing cylindrical walls 13a, 13b. It is installed inside. By doing so, when the socket housing 9 is fitted in the fitting recess 7 of the pin connector 1 and the contacts 10a, 10b, ... Are connected to the pin terminals 6a, 6b ,. Each pin terminal that can be connected to the contact is connected to the contact accommodating cylinder wall 13a in a two-tiered staggered arrangement.
Surrounded by 13b. Moreover, the cross-sectional shape of each of the contact accommodating cylinder walls 13a and 13b is circular.

In addition, in the above-mentioned connected state, the present invention is such that the seal member 14 is closely provided around each contact accommodating cylindrical wall 13a, 13b ... is there. This will be specifically described with reference to FIGS. 4 to 7. The entire outer peripheral surface 15 of the seal member 14 is in close contact with the inner peripheral surface 16 of the fitting recess 7 of the connector housing 5, and the tip 17 thereof is fitted. Bottom surface 1 of recess 7
8, the fitting recess 7 of the connector housing 5 in a state of facing 8
It is installed inside. And this one-piece seal member 1
4, each of the contact accommodating cylinder walls 13a, 13b ...
..Circular insertion holes 19a, 19b, 1 at places where
.. are formed, and these insertion holes 19a, 19 are formed.
b, 19c ...- Areas around the respective seal parts 20
It is divided as. In addition, the upper and lower stairs are arranged in a staggered manner, and these insertion holes 19a, 19 are formed.
b, 19c ...- The above-mentioned contact accommodating cylinder wall 13
A, 13b, ... Are arranged in a staggered upper and lower two rows so that they can be inserted. In this example, one insertion hole 19 is provided in the upper stage X.
a and another insertion hole 19c are shown, and the insertion hole 1 is shown in the lower stage.
Insertion holes 19b that are staggered with respect to 9a and 19c are shown.

Focusing on each of the seal portions 20, a valley portion 23 and a ridge portion 24 are alternately formed on the seal surface 22 that is in close contact with the outer peripheral surface 21 of each of the contact accommodating cylinder walls 13a and 13b. 24 is in close contact with the outer peripheral surface 21. Therefore, when the socket housing 9 is fitted in the connector housing fitting concave portion 7 of the pin connector 1, the contact receiving cylinder walls 13a, 13b, ...
Are inserted into the insertion holes 19a, 19b, 19c, ... of the contact receiving cylinder walls 13a, 13c.
The area around b ... Is sealed by the sealing surface 22 of the sealing portion 20 of the sealing member 14. That is, the pin terminals and the contacts that can be connected to each other are individually and independently sealed around them. Of course, the water that enters the water between the outer peripheral surface of the socket housing 9 and the inner peripheral surface of the connector housing 5 is caused by the outer peripheral surface 15 of the sealing member 14 being in close contact with the inner peripheral surface 16 of the fitting recess 7. Will be prevented
Pin terminal 6a attached to the pin connector housing 5,
.. and the pin connector housing 5 are appropriately sealed, and the socket housing 9 and the electric wire 11 are also sealed by, for example, a seal packing 25 as shown in the drawing.

In addition, the seal member 14 having the seal portion 20 integrated therewith is provided with a means for preventing the seal member 14 from being detached at the time of insertion / removal. That is, it has a seal stopper 26. One specific example of this is shown in FIGS. That is, one end 27 of the seal stopper 26 is engaged with the engaging convex portion 29 of the front portion 28 of the connector housing 5, and the other end surface 30 of the seal stopper 26 is abutted against the rear end surface 31 of the seal member 14 of the connector housing 5. It is mounted on the inner surface. The seal stopper 26 is also formed as an integral body, and the insertion hole 3 into which the contact housing cylindrical walls 13a and 13b can be inserted.
2a, 32b, 32c are formed, and when the socket housing 9 is fitted into the fitting recess 7 of the connector housing 5,
The contact-accommodating cylinder walls 13a and 13b are provided with the insertion holes 32.
It is fitted through a, 32b and 32c. Therefore, each seal portion 20 of the seal member 14 is held by each end surface 30 of the seal stopper 26. Of course, the seal member 14
Is an integral body, but when focusing on one seal portion 20 of that portion, the seal portion 20 is formed in a circumferential shape so as to surround the contact housing cylindrical wall 13a, and
Since the end surface of the seal stopper 26 is also formed circumferentially, the seal portion 20 is held circumferentially.

The operation will be described based on the above configuration.
When the pin connector 1 and the socket 2 are fitted to each other, the contact housing cylindrical walls 13 a, 13 of the socket housing 9 are
b ... Each of which is an insertion hole 32 of the seal stopper 26.
., and inserted into the respective insertion holes 19a, 19b, 19c ... Of the seal member 14, and in this state, each of the contacts 10a, 10b ..., And the pin terminals 6a, 6b. ... connect to each other. This state is shown in FIG. Here for some reason,
It is assumed that water has entered due to a capillary action or the like through a very small gap between the core wire of the electric wire 11 and the insulating coating. In the case of the example of this figure, focusing on the connection location of one pin terminal 6a and one contact 10a connected to it, the water that has invaded here is transmitted through the inner wall of the contact housing cylindrical wall 13a,
Moreover, it tries to enter the connection location of the adjacent pin terminal 6b and contact 10b through the contact surface between the tip end 33 of the contact housing cylinder wall 13 and the bottom surface 18 of the fitting recess 7. However, the seal portion 20 of the seal member 14 is arranged around the contact housing cylinder wall 13a. Since the tip end 17 of the seal portion 20 faces the bottom surface 18 of the fitting recessed portion 7, water is prevented from entering therethrough, and especially the ridge portion 24 of the seal portion 20 is resilient to the contact accommodating cylinder wall 13a. Close to. Therefore, water is prevented from entering along the outer peripheral surface of the contact housing cylinder wall 13a. This is the same even when attention is paid to the connection location between the other pin terminal 6b and the contact 10b. Therefore, each pin terminal and contact that can be connected to each other are individually sealed and are prevented from being electrically short-circuited with each other.

In addition, the seal member 14 is used for each contact 1
0a, 10b, ... are not directly and closely arranged around each contact 10a, 10b when fitted.
... Cylindrical peripheral walls 13a, 13b surrounding the respective ...
Since the above-mentioned action is achieved by closely arranging the contacts around, the elastic change at the time of connection of each contact of the counterpart to which each pin terminal is connected is not hindered.

By the way, each contact accommodating tubular peripheral wall 13a,
13b ... Each insertion hole 19a, 19b, 19 around
.. is circular, and the sealing surface 22 evenly contacts the outer peripheral surface 21 of each of the contact housing cylinder walls 13a, 13b .. Further, even if such contact accommodating tubular peripheral walls 13a, 13b ... Are provided, the insertion holes 19a, 19b,
19c ... Each peripheral wall 13a, 1 for accommodating each contact
Since 3b ... Also has a staggered arrangement of two steps, the height of the entire electrical connector can be reduced.

Further, since the seal member 14 as a whole is held by the seal stopper 26, there is no possibility that the seal member 14 will come out of the specified position even if the pin connector 1 and the socket 2 are repeatedly inserted and removed.

Further, since the respective seal portions 20 of the seal member 14 are suppressed by the end surface 30 of the stopper 26, the seal portions 20 come into close contact with the resilient contact contact cylindrical walls 13a and 13b of the peak portion 24 of each seal portion 20. The state is increased and the sealing property is better maintained.

[0025]

[Effect] As described in detail above, the present invention has the following effects. That is, in a multi-pin, multi-contact electrical connector, water infiltrates through a very small gap between the core wire of the wire and the insulating coating due to capillary action, etc. Even if it reaches, each connection point,
Since they are individually sealed by the seal members that are in close contact with the outer peripheral surface of each tubular peripheral wall, there is no risk of water infiltration from one connection point to another connection point or vice versa, and they are adjacent to each other. This has an advantage that the connecting points are not electrically short-circuited. In addition, the seal member is not directly and closely arranged around each contact, but each contact is surrounded by the cylindrical peripheral wall, and when each pin terminal and each contact are fitted and connected, Since the sealing member is brought into close contact with the outer peripheral surface of the cylindrical peripheral wall, each connecting portion of each pin terminal and each contact is sealed to the connecting portion of the adjacent pin terminal and contact, so that each contact The above advantages are enabled without interfering with the elastic change function of the. Further, the adhesion of the seal member to each contact accommodating cylinder wall becomes better, and a better seal between the contact and the pin terminal can be achieved. In addition, since the seal member is held by the seal stopper, there is an advantage that the seal member does not fall off when it is inserted or removed.

In addition, the insertion hole of the seal member around each contact accommodating cylinder wall is circular, and the sealing surface is evenly contacted with the outer peripheral surface of each contact accommodating cylinder wall, so that the overall sealing performance is good and Even if such a contact accommodating cylinder wall is provided, since the insertion holes of the seal member and the contact accommodating cylinder walls are arranged in a zigzag pattern in two steps, the height of the entire electrical connector can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a pin connector (a cross-sectional view shown by a line segment cut along the arrangement of pin terminals arranged in a staggered pattern).

FIG. 2 is a sectional view of a socket (a sectional view taken along a line segment cut along the arrangement of contacts arranged in a staggered manner).

FIG. 3 is a sectional view showing a place where the pin contact and the socket shown in FIGS. 1 and 2 are fitted and connected.

FIG. 4 is a front view of a seal member.

FIG. 5 is a rear view of the seal member.

6 is a cross-sectional view taken along the line YY 'of FIG.

7 is a sectional view taken along line XX ′ of FIG.

FIG. 8 is a front view of a seal stopper.

FIG. 9 is a plan view of a seal stopper.

FIG. 10 is a rear view of the seal stopper.

FIG. 11 is a right side view of the seal stopper.

FIG. 12 is a sectional view taken along line ZZ ′ of FIG.

13 is a cross-sectional view taken along the line WW of FIG.

[Explanation of symbols]

1 pin connector 2 socket 5 pin connector housing 6a, 6b pin terminal 7 fitting recess 9 socket housing 10a, 10b contact 11 wire 14 seal member 15 outer peripheral surface of seal member 16 inner peripheral surface 17 of fitting recess 17 tip of seal member 18 Bottom of Fitting Recess 20 Sealing Part of Sealing Member 23 Valley 24 Crest 26 Seal Stopper 30 End Face of Seal Stopper 31 Sealing Member 1 with which End Face of Seal Stopper Hits
End of 4

Front page continuation (72) Minor Sano Minoru Sano 4-9-14 Fukamidai Yamato-shi, Kanagawa Green Heights 101 (72) Masahiro Sakano 74-3 Kamisuda-cho, Hodogaya-ku, Yokohama-shi, Kanagawa

Claims (1)

[Scope of utility model registration request] 1. The socket housing 9 is formed by integrally forming a plurality of contact accommodating cylinder walls 13a, 13b ..., Each of the plurality of contacts 10a, 10b ... 13a, 13b, ..., and sockets 2 arranged so as to be individually housed therein, and a fitting for housing the contact housing cylindrical walls 13a, 13b, ... of the socket 2 in the contact housing 5. The fitting recess 7 is formed, and each insertion hole 19 of the seal member 14 is disposed in the fitting recess 7 such that the tip 17 thereof faces the bottom surface 18 of the fitting recess 7.
In the electrical connector comprising the pin connector 1 in which the pin terminals 6a, 6b ... Are arranged so as to be located inside the pin connector 1 and the socket. When the two are fitted, the insertion holes 19a, 19b, 1 of the seal member 14 in the fitting recess 7 are inserted.
9c ... Each contact accommodating cylinder wall 13a, 13b
..., and each contact accommodating cylinder wall 13a, 13b
... Sealing surface 2 for partitioning the insertion holes 19a, 19b, 19c of the sealing member 14 on the outer peripheral surface 21 of
2 are closely contacted with each other, and each of the contact accommodating cylinder walls 13a, 13b ... Is formed in a circular cross section, and each of the circular contact accommodating cylinder walls 13a, 13b.
The insertion holes 19a, 19b, 19c ... Of the seal member 14 that are in close contact with the outer peripheral surface 21 are also formed in a circular cross section and the plurality of contacts 10a, 10b.
.. for accommodating each of the contact receiving cylinder walls 13
a, 13b, ... Are a plurality of contacts 10a, 10a
The seal member is arranged in a staggered arrangement of two upper and lower stages in accordance with the staggered arrangement of two upper and lower stages of b ..., And the plurality of pin terminals 6a, 6b ... The plurality of insertion holes 19a, 19b, 19c, ... of 14 are also arranged in a staggered arrangement of two upper and lower stages corresponding to the staggered arrangement of the upper and lower two stages of the contact housing cylindrical walls 13a, 13b. A waterproof type electrical connector characterized by having.