JP2018206657A - Half-fitting preventive and waterproof connector - Google Patents

Abstract

To provide a half-fitting preventive and waterproof connector capable of achieving simple assembly and improvement of productivity by reducing the number of components.SOLUTION: A half-fitting preventive and waterproof connector 10 comprises: one connector 20 having one terminal 26 in a hood part 22, and a lock arm 23 in the outside of the hood part 22; the other connector 30 having the other terminal 36 in a terminal housing part 32, and a connector fitting chamber 35 in which the hood part 22 is fitted to the outside of the terminal housing part 32; and a waterproof member 38 that is provided in the connector fitting chamber 35, is elastically deformed by pressurization of the hood part 22, and makes a gap between the terminal housing part 32 and the hood part 22 sealable, and has an elastic force for separating both connectors 20 and 30 by energizing the one connector 20 in an anti-fitting direction B during semi-fitting of both the connectors 20 and 30 until a lock part 24 of the lock arm 23 is locked to a locking part 34a of the other connector 30.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a half-fitting prevention waterproof connector having a half-fitting prevention function and a waterproof function.

  As this type of semi-fitting prevention waterproof connector, those shown in FIGS. 5 and 6 are known. As shown in FIGS. 5 and 6, the semi-fitting prevention waterproof connector 1 has a male terminal 2 having a male terminal 4 in the hood portion 3a of the male housing 3 and a lock arm 3b outside the hood portion 3a. A female connector 5 having a female terminal 7 in the terminal accommodating portion 6a of the female housing 6, and a connector fitting chamber 6b in which the hood portion 3a is fitted outside the terminal accommodating portion 6a, and a connector fitting chamber 6b. A waterproof packing 8 that seals between the terminal housing portion 6a and the hood portion 3a when the tip of the hood portion 3a comes into contact with the inside of the spring housing portion 6d formed at the center of the terminal housing portion 6a. By the pressing portion 3d protruding to the center of the hood portion 3a when the connectors 2 and 5 are half-fitted until the locking projection 3c of the locking arm 3b is locked to the locking projection 6c of the female housing 6. Compression deformed male connector The and a, a compression coil spring 9 to separate the two connectors 2,5 urges the B (opposite direction of the mating direction A) anti-fitting direction.

  Then, in order to prevent half-fitting (half-way fitting), the repulsive force of the compression coil spring 9 is made stronger than the insertion force when the male and female connectors 2 and 5 are fitted, so that the lock arm 3b of the male housing 3 is obtained. The male housing 3 is pushed back by the elastic force (restoring force) of the compression coil spring 9 until the male terminal 4 and the female terminal 7 do not contact each other until the locking projection 3c of the female housing 6 and the locking projection 6c of the female housing 6 are locked. When the male and female connectors 2 and 5 are half-fitted, the male terminal 4 and the female terminal 7 do not conduct.

JP-A-9-129313

  However, in the conventional half-fitting prevention waterproof connector 1, since the compression coil spring 9 for preventing half-fitting and the waterproof packing 8 are separate members, the number of parts is correspondingly increased and it takes time to assemble. Etc., productivity is getting worse.

  Accordingly, the present invention has been made to solve the above-described problems, and provides a small-sized semi-fitting prevention waterproof connector that can be easily assembled and improved in productivity by reducing the number of parts. For the purpose.

  The present invention is a semi-fitting prevention waterproof connector having a semi-fitting prevention function and a waterproof function, having one terminal in the hood part, and one connector having a lock arm outside the hood part, The other terminal having the other terminal in the terminal accommodating portion, and the other connector having the connector fitting chamber in which the hood portion is fitted outside the terminal accommodating portion, and the hood portion provided in the connector fitting chamber When the two connectors are half-fitted until they are elastically deformed by pressing so that the terminal housing portion and the hood portion can be sealed, and the lock portion of the lock arm is locked to the locking portion of the other connector. And a waterproof member having an elastic force for biasing the one connector in the anti-fitting direction to separate the two connectors.

  Further, the waterproof connector for semi-fitting prevention according to the present invention is formed by forming the connector fitting chamber with an inner housing serving as the terminal accommodating portion and an outer housing provided outside via a partition wall from the inner housing, The waterproof member is compressed and deformed by the tip of the hood portion when the two connectors are fitted, and the space between the inner housing and the hood portion can be sealed.

  According to the present invention, the waterproof member that seals between the hood portion of one connector and the terminal accommodating portion of the other connector is biased in the anti-fitting direction when the two connectors are half-fitted. By using both as a biasing member that separates both connectors, the number of parts can be reduced correspondingly, and assembly can be facilitated and productivity can be improved. Further, since an elastic member such as a spring is not used, the entire connector can be reduced in size.

It is a perspective view which shows the principal part of the half-fitting prevention waterproof connector of one Embodiment of this invention in a cross section. It is sectional drawing which shows the state before a waterproof member elastically deforms before fitting of the said semi-fitting prevention waterproof connector. It is sectional drawing which shows the state which a waterproof member elastically deforms in the middle of the fitting of the said semi-fitting prevention waterproof connector. It is sectional drawing which shows the fitting completion state of the said semi-fitting prevention waterproof connector. It is explanatory drawing which shows the state before the fitting of the conventional semi-fitting prevention waterproof connector. It is explanatory drawing which shows the state of the completion of fitting of the said conventional semi-fitting prevention waterproof connector.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing a main part of a half-fitting prevention waterproof connector according to an embodiment of the present invention in cross section, FIG. 2 is a cross-sectional view showing a state before the waterproof member is elastically deformed before the connector is fitted, FIG. 3 is a cross-sectional view showing a state in which the waterproof member is elastically deformed during the fitting of the connector, and FIG. 4 is a cross-sectional view showing a completed state of the connector.

  As shown in FIGS. 1 to 4, the semi-fitting prevention waterproof connector 10 has a plurality of male terminals (one terminal) 26 in a cylindrical hood portion 22 of a male housing 21 made of hard synthetic resin. A plurality of female terminals (other terminals) 36 are provided in a male connector (one connector) 20 having a pair of lock arms 23, 23 on the outside of the hood portion 22 and a terminal accommodating portion 32 of a female housing 31 made of hard synthetic resin. A female connector (the other connector) 30 having a connector fitting chamber 35 in which the hood portion 22 is fitted to the outside of the inner housing (terminal accommodating portion) 32, and a hood provided in the connector fitting chamber 35. The inner housing 32 and the hood portion 22 are elastically deformed by the pressing of the tip 22a of the portion 22 so that the space between the inner housing 32 and the hood portion 22 can be freely sealed. When the connectors 20 and 30 are half-fitted until they are locked by the pair of locking projections (locking portions) 34a and 34a of the outer housing 34 of the outer housing 34, the male connector 20 is anti-fitted (reverse of the fitting direction A). And a cylindrical waterproof member 38 made of a rubber material or the like having an elastic force (restoring force) that urges the connector 20 or 30 in the direction (B).

  A plurality of pin-shaped male terminals 26 project from the hood portion 22 of the male connector 20. An electric wire 27 is connected to the male terminal 26.

  Further, on the outer peripheral surface of the male housing 21 of the male connector 20, there are lock protrusions 24 that are respectively engaged with a pair of locking protrusions 34 a and 34 a that are integrally formed on the outer peripheral surface of the outer housing 34 of the female housing 31. The pair of lock arms 23, 23 are integrally formed to project. At this time, the holding force is greater than the repulsive force of the waterproof member 38.

  The inner housing 32 of the female connector 30 is formed in a cylindrical shape and has a plurality of terminal accommodating chambers 32a. An electric wire 37 is connected to the cylindrical female terminal 36 accommodated in the terminal accommodating chamber 32a.

  Further, the connector fitting chamber 35 of the female connector 30 is formed by an inner housing 32 serving as a terminal accommodating portion, and an outer housing 34 provided outside the inner housing 32 via a disk-shaped partition wall 33, When the hood portion 22 is fitted into the connector fitting chamber 35 when the two connectors 20 and 30 are fitted, the waterproof member 38 is pressed and compressed and expanded by the tip 22a of the hood portion 22, and the inner housing 32 and the hood The space between the portions 22 can be freely sealed. The repulsive force generated at this time is larger than the connector detachment force. Note that one end side of the waterproof member 38 is attached to the inner surface 33 a of the partition wall 33.

  Further, as the waterproof member 38 having elasticity, for example, various rubber materials such as nitrile rubber, fluorine rubber, silicone rubber, ethylene propylene rubber, chloroprene rubber, urethane rubber, plasticizer, antioxidant, A product in which processing aids, fillers, cross-linking agents, etc. are blended and the blending ratio is adjusted in a timely manner so as to achieve the following physical characteristics is used.

<Physical properties>
JIS A hardness: 50 to 90 (optimum is 60 to 75)
-Tensile strength (MPa): 12-32 (optimum is 17-26)
Elongation rate (%): 150 to 400 (optimum is 180 to 350)
Elastic force (MPa): 0.3 to 40 (optimum is 2 to 10), MPa = N / mm ²
Further, a cross-linked product is used.

  According to the half-fitting prevention waterproof connector 10 of the above embodiment, as shown in FIG. 3, in order to prevent half-fitting (half-way fitting) of the male and female connectors 20, 30, a waterproof member 38 having elasticity is provided. Until the locking projection 24 of the locking arm 23 of the male connector 20 is locked to the locking projection 34 a of the female housing 31 by having a repulsive force greater than the connector detachment force that separates the male and female connectors 20, 30. The male connector 20 is pushed back to the state where the male terminal 26 and the female terminal 36 of the female connector 30 do not contact each other, and the conduction in the half-fitting is lost.

  Furthermore, as shown in FIG. 4, the waterproof member 38 having elasticity has a repulsive force equal to or less than the lock strength of the lock projection 24 of the lock arm 23 of the male housing 21 and the locking projection 34 a of the female housing 31. The locking state of the locking projection 24 of the locking arm 23 of the male housing 21 and the locking projection 34a of the female housing 31 is maintained. In addition, in order to waterproof the semi-fitting prevention waterproof connector 10, when the male and female connectors 20 and 30 are fitted, the waterproof member 38 having elasticity is pressed and compressed by the tip 22 a of the hood portion 22, so that the female The inner housing 32 of the housing 31 and the waterproof member 38 having elasticity are in close contact with each other, and the half-fitting prevention waterproof connector 10 has a waterproof function.

  As described above, the waterproof member 38 having elasticity that seals between the hood portion 22 of the male connector 20 and the inner housing 32 as the terminal accommodating portion of the female connector 30 is used when the connectors 20 and 30 are half-fitted. Since the connector 20 is urged in the anti-fitting direction B to be used as an urging member for separating the connectors 20 and 30 (for both half-fitting prevention and waterproofing), the number of parts is reduced accordingly. As a result, assembly is facilitated and productivity can be improved. Moreover, since an elastic member such as a spring is not used, the entire semi-fitting prevention waterproof connector 10 can be reduced in size.

  In addition, according to the said embodiment, although the latching | locking part of the female housing to which the locking part of a locking arm latches was a latching protrusion, it is good also as a latching recessed part, and a lock arm is not a pair, Three or more may be sufficient. Furthermore, although the male and female housings are formed in a cylindrical shape or a columnar shape, they may be formed in a rectangular box shape or a rectangular shape.

  In this embodiment, a silicone rubber having the following physical properties that has been crosslinked is used as the waterproof member 38.

<Physical properties>
・ JIS A hardness: 70
-Tensile strength (MPa): 22
・ Elongation rate (%): 330
-Elastic force (MPa): 6 (N / mm ² )
Further, the contact portion area to the distal end 22a of the hood portion 22 of the waterproof member 38 is a 11 mm ^2, the elastic force (N) was used things 66N (6MPa × 11mm ^2).

10 Half-fitting prevention waterproof connector 20 Male connector (one connector)
22 Hood part 22a Tip 23 Lock arm 24 Lock protrusion (lock part)
26 Male terminal (one terminal)
30 Female connector (the other connector)
32 Inner housing (terminal receiving part)
33 Partition 34 Outer housing 34a Locking protrusion (locking portion)
35 Connector fitting chamber 36 Female terminal (the other terminal)
A mating direction B counter mating direction

Claims (2)

One connector having one terminal in the hood portion, and one connector having a lock arm outside the hood portion;
The other connector having the other terminal in the terminal accommodating portion, and having a connector fitting chamber in which the hood portion is fitted outside the terminal accommodating portion,
It is provided in the connector fitting chamber and is elastically deformed by the pressing of the hood portion so that the terminal accommodating portion and the hood portion can be sealed, and the lock portion of the lock arm is engaged with the locking portion of the other connector. A waterproofing member having an elastic force to urge the one connector in the anti-fitting direction at the time of half-fitting of the two connectors until it is stopped, and to separate the two connectors;
A semi-fitting prevention waterproof connector characterized by comprising: The waterproof connector for semi-fitting prevention according to claim 1,
The connector fitting chamber is formed by an inner housing serving as the terminal accommodating portion and an outer housing provided outside from the inner housing via a partition wall, and when the two connectors are fitted, by the tip of the hood portion The waterproof connector for semi-fitting prevention, wherein the waterproof member is compressed and deformed so that the inner housing and the hood portion can be sealed.

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