Connector equipped with insertion detecting member for terminal metal parts

Abstract: There are provided the resilient engaging piece (3) to the terminal metal part (C) provided through the resilient displacement permissible space (4) opposite to the terminal accommodating cavity (1) formed at connector body portion of the connector, and the insertion detecting member (7) corresponding to the resilient displacement permissible space (4) at the main frame portion (6) of the insertion detecting member for terminal metal part (B) and the pair of manipulating pieces (8) at both side thereof. The insertion detecting member for terminal metal part (B) causes the main frame portion (6) to come into contact with the inside wall surface of the hood portion (A2), with it moved freely. The pair of manipulating pieces (8) are exposing both sides of the housing body portion (A1) from the window (10) of the hood portion (A2) at the provisional engaging position, the insertion detecting body (7) enters into the resilient displacement permissible space (4) at the formal engaging position.

Description: The present invention relates to a connector equipped with an insertion detecting member for terminal metal parts which is capable of detecting incomplete insertion of the terminal metal parts. In Figs. 16 and 17, (a) is a female type connector housing with a hood portion (a1) in front thereof, (b) is an insertion detecting member for a terminal metal part. The insertion detecting member (b) is provided with an introducing portion (b1) divided into two followed by detecting portion (b2). An insertion guide portion (b3) is formed at both side of the detecting portion (b2) and a turned downward arch-shaped manipulating portion (b4) is provided in the direction of the lower part of the introducing portion (b1). A pair of guide grooves (d),(d) are formed at an opposite position of an inside wall of hood portion (a1) of the female type connector housing (a). It causes the insertion detecting member (b) to press into the hood portion (a1) while engaging the insertion guide portions (b3), (b3) with the guide grooves (d), (d). It causes the manipulating portion (b4) to protrude toward the outside from the window (e) formed from the hood portion (a1) to a housing body (a2) (referring to Figs. 17 and 18). Fig. 18 shows a provisional engagement condition of the insertion detecting member (b). It permits a provisional engaging projection (f) to engage with a rear end of a connecting portion (g) of the female connector housing (a). In the provisional engagement condition, it causes the terminal metal part (c) to insert into a terminal accommodating cavity (a3) from the rear while bending downward a resilient engaging piece (h) through displacement permissible space (i). After complete insertion of the terminal metal part (c), it causes the engaging projection (h1) of the resilient engaging piece (h) which is restored to the original state to engage with it inserted into an engaging hole of the terminal metal part (c). In this condition, it causes the insertion detecting member (b) to press into the female connector housing (a) by taking the manipulating portion (b4), and it causes the detecting portion (b2) to position into the displacement permissible space (i). It causes the formal engaging projection (j) to connect to the rear end of the connecting portion (g), and it causes the introducing detecting member (b) to fix with the formal engaging condition as shown in Fig. 19. As shown in Fig. 20, when the terminal metal part (c) is inserted incompletely, it becomes impossible that it causes the insertion detecting member (b) to move toward the formal engaging position, since the resilient engaging piece (h) which is forced to be deformed by the terminal metal part (c) inserted incompletely is positioned in the displacement permissible space (i) as a result thereof, it becomes possible to detect the terminal metal part (c) inserted incompletely. In the above described prior art, since the guide grooves (d), (d) are formed at the inside wall of the hood portion (a1), the hood portion (a1) is prone to deform. If it gives body and substance to the surroundings of the guide grooves (d), (d) to prevent this deformation, they are at a disadvantage in that the external shape dimension becomes large. Further since it causes the arch-shaped manipulating portion (b4) to protrude toward the outside of the female connector housing (a), a large notching for forming the window (e) from the hood portion (a1) to the housing body portion (a2) becomes necessary. Furthermore, since it causes the insertion detecting member (b) engaged with the guide groove (d) to move to the formal engaging position by the manipulating portion (b4) protruded at one side of the detecting member (b), the scuffing is prone to generate at the insertion detecting member (b) in case of manipulating with the insertion detecting member (b) moved, they are at a disadvantage in that movement can not be performed smoothly. US-A-5 071 369 discloses a connector comprising a connector housing and an insertion detecting member for detecting the position of a terminal metal part, wherein the connector housing has a terminal accomodating cavity receiving a resilient engaging piece, and the insertion detecting member has a main frame portion and an insertion detecting body, wherein the insertion detecting member is inserted into the connector housing by depressing the resilient engaging piece into the terminal accomodating cavity. In view of the foregoing, it is an object of the present invention to provide a connector equipped with an insertion detecting member for terminal metal parts which does not fail the strength of the connector housing even if the insertion detecting member is provided, and the insertion detecting member is capable of moving smoothly in case of operating. According to the invention, this is achieved by the features of claim 1. Advantageous further embodiments are described in the subclaims. As stated above, the connector equipped with the insertion detecting member for terminal metal part according to the invention in which it permits the insertion detecting member for terminal metal part to move by pulling one pair of the manipulating pieces exposed to the side direction of the housing body portion from the provisional engaging position to the formal engaging position, at this time if there exists a terminal metal part with an incomplete insertion, since the insertion detecting body comes into contact with the resilient engaging piece positioned into the resilient displacement permissible space, the insertion detecting member for terminal metal part is not capable of being moved. Next, according to an embodiment of the invention it causes the formal engaging projection to engage with the lock connecting portion by pulling one pair of the manipulating pieces exposed thereby it causes the insertion detecting member to proceed to the formal engaging portion for the female connector. In the formal engaging portion, the insertion detecting member enters into the resilient displacement permissible space thereby it ensures the preventing omission of the terminal metal part with the displacement of the resilient engaging piece avoided. The above and further objects and novel features of the invention will be more fully understood from the following detailed description when the same is read in connection with the accompanying drawings. It should be expressly understood, however, that the drawings are for purpose of illustration only and are not intended as a definition of the limits of the invention. Fig. 1 is a perspective view showing a separated condition between the connector and the insertion detecting member for terminal metal parts of an embodiment according to the present invention; Fig. 2 (A) is a sectional view showing a provisional engaging condition of the insertion detecting member for terminal metal parts to the connector; Fig. 2 (B) is a sectional view along an insertion axis direction of Fig. 2 (A); Fig. 3 (A) is a perspective view showing a formal engaging condition of the insertion detecting member for terminal metal parts to the connector; Fig. 3 (B) is a sectional view along the insertion axis direction of Fig. 3 (A); Fig. 4 is a perspective view showing a separated condition between the connector and the insertion detecting member for terminal metal parts of an other embodiment according to the present invention; Fig. 5 is a perspective view showing a provisional engaging condition of Fig. 4; Fig. 6 is a perspective view showing a formal engaging condition of Fig. 4; Fig. 7 is a perspective view showing a separated condition between the connector and the insertion detecting member for terminal metal parts of an another embodiment according to the present invention; Fig. 8 is a side view showing a provisional engaging condition of Fig. 7; Fig. 9 is a perspective view showing a formal engaging condition of Fig. 7; Fig. 10 is a side view showing a formal engaging condition according to the other embodiment of the present invention; Fig. 11 is a perspective view showing a separated condition between the connector and the insertion detecting member for terminal metal parts according to the another embodiment of the present invention; Fig. 12 is a perspective view showing a provisional engaging condition of Fig. 11; Fig. 13 is a perspective view showing a formal engaging condition of Fig. 11; Fig. 14 is a side view showing a provisional engaging condition of Fig. 11; Fig. 15 is a side view showing a formal engaging condition of Fig. 11; Fig. 16 is a perspective view showing a separated condition between the connector and the insertion detecting member for terminal metal parts according to the conventional embodiment; Fig. 17 is a perspective view showing a provisional engaging condition of Fig. 16; Fig. 18 is a sectional view along an insertion axis direction of Fig. 17; Fig. 19 is a sectional view showing a formal engaging condition of Fig. 17; and Fig. 20 is a sectional view showing an incomplete insertion condition of the terminal metal parts of Fig. 17. A preferred embodiment of the present invention will now be described in detail referring to the accompanying drawings. In Figs. 1 to 3 (B), A is a female connector, B is an insertion detecting member for a terminal metal part C. The female connector A comprises a housing body portion A1 and a hood portion A2 extended through a step portion A3 in front thereof. A plurality of terminal accommodating cavities 1 are provided at the housing body portion A1 each two stairs-like configuration. In each terminal accommodating cavity, a stopper 2 is provided in front end thereof, and a cantilevered resilient engaging piece 3 extending forward through a supporting base portion 3a is provided at a lower portion. An engaging projection 3b is provided at a free end portion in front of the resilient engaging piece 3. A resilient displacement permissible space 4 is formed downward opposite side of the terminal accommodating cavity 1. A connecting frame portion for locking 5 is provided at an upper portion of the hood portion A2. A lock connecting portion 5' is formed at a rear end open part of the connecting frame portion for locking 5. The insertion detecting member B for the terminal metal parts C has a middle portion of a main frame portion 6 shaped narrow width in back and forth direction and a plurality of insertion detecting bodies 7 extending forward corresponding to the resilient displacement permissible space 4 in the lower part thereof. A pair of manipulating pieces 8 extending forward are provided at both sides thereof and a resilient locking arm 9 extending forward is provided in the upper part. The resilient locking arm 9 has a provisional engaging projection 9a at forward end, and a formal engaging projection 9b at middle portion thereof. In the above described construction, it causes the insertion detecting member B to insert into the hood portion A2 while contacting the main frame portion 6 to the interior of the hood portion A2 beforehand. The insertion detecting member is combined with the female connector A at the provisional engaging position in which it causes the provisional engaging projection 9a of the resilient locking arm 9 to engage the lock engaging portion 5'. At this time, one pair of manipulating pieces 8 are exposed at the side portion of the housing body portion A1 from the window 10 (referring to Fig. 1) of the step portion A3. (referring to Fig. 2 (A)) It causes the terminal metal part C to insert into the terminal accommodation cavity 1 from the rear direction of the housing body A1. At this time, the terminal metal part C is inserted into the terminal accommodating cavity 1 while deforming the resilient engaging piece 3 through the resilient displacement permissible space 4. After complete insertion of the terminal metal part C, it causes the engaging projection 3b of the resilient engaging piece 3 which is restored to the original state to engage with the shoulder portion 11 thereby it causes the omission of the terminal metal part C to prevent.(referring to Fig. 2 (B)) Next, it causes the formal engaging projection 9b to engage with the lock connecting portion 5' by pulling one pair of the manipulating pieces 8 exposed thereby it causes the insertion detecting member B to proceed to the formal engaging portion for the female connector A. In the formal engaging portion, the insertion detecting body 7 enters into the resilient displacement permissible space 4 thereby it ensures the preventing omission of the terminal metal part C with the displacement of the resilient engaging piece 3 avoided. (referring to Fig. 3 (B)) In the case of incomplete insertion condition of the terminal metal part C, since the resilient engaging piece is positioned into the resilient displacement permissible space 4, the insertion detecting member B is not capable of being moved to the formal engaging position in that the insertion detecting body 7 can not enter into the resilient displacement permissible space 4, thereby the incomplete insertion of the terminal metal part C can be detected. In the construction as shown in Figs. 4 to 6, a manipulating piece 8' formed as a resilient frame body is provided at both sides of a main frame portion 6' of a insertion detecting member for terminal metal part B', a cone-shaped provisional engaging projection 8a' and a formal engaging projection 8b' are formed at the upper and lower parts of the manipulating pieces 8', a cone-shaped provisional engaging projection 12a and a formal engaging projection 12b are provided protrusively at a guide rib 12 of the side wall outer surface of a housing body A1'. Fig. 5 shows a joined condition at the provisional engaging position to the female connector A' and the insertion detecting member B', the provisional engaging projection 8a' exposed at the side portion of the housing body portion A1' through the window 10 of the step portion A3' from the inside of the hood portion A2' engages with the provisional engaging projection 12a formed at the guide rib 12 in the upper part. It causes the insertion detecting member B' to move by means of the pair of manipulating piece using the fingers, at this time, the formal engaging projections 8b' and 12b are engaged with each other in that the manipulating piece 8' formed by the resilient frame body is bent, thereby the formal engaging position of the insertion detecting member B' is ensured. In the construction as shown in Figs. 7 to 10, the manipulating piece 13 made of resilient frame body is provided both sides of main frame portion 6' of the insertion detecting member for terminal metal part B1, provisional engaging projections 13a, 13a of the outside of the upper and lower parts of the free end side are symmetrically formed to the center line L1 of the manipulating piece 13. The formal engaging projection 13b, 13b are formed at the symmetrical position through the center line L1 of the inside of the upper and lower parts which is offset to the main frame portion 6'. A pair of provisional engaging projections 14a, 14a which are opposite each other are formed at the guide rib 12 in the side wall outer surface 14 of the housing body A1'. A columnar formal engaging projection 14b is provided protrusively on the center line L1 at the middle portion of the pair of guide rib 12, 12 offset to the step portion A3'. A tapered connecting guide surface 13a1 at the front in the direction of travel of the provisional engaging projection 13a and a vertical connecting surface 13a2 at the rear in the direction of travel of the provisional engaging projection 13a are formed. A tapered connecting guide surface 13b1 at the front in the direction of travel of the formal engaging projection 13b and a tapered connecting surface 13b2 at the rear in the direction of travel of the formal engaging projection 13b are formed. A tapered connecting guide surface 13a2 at the front in the direction of back and forth of the housing body A1' at the provisional engaging projection 14a of the housing body A1' and a vertical engaging surface 14a1 at the rear in the direction of back and forth of the housing body A1' at provisional engaging projection 14a of the housing body A1' are formed. Further 13c is a manipulating portion for fingers. In the above constitution, the provisional engaging projections 13a, 13a of the manipulating piece 13 engage with the provisional engaging projection 14a, 14a in the provisional engaging condition of the insertion detecting member B1. (referring to Fig. 8) In this condition, it causes the insertion detecting member B1 to pull out by the manipulating portion 13c with fingers. At this time, it permits the pair of formal engaging projection 13b, 13b to contact with the formal engaging projection 14b and the pair of formal engaging projection 13b, 13b climb over the formal engaging projection 14b while deforming themselves in the direction of up and down, be restored to their original state. There becomes the formal engaging condition. (referring to Fig. 9 ) In the above construction, since the pair of provisional engaging projection 13a, 13a and the formal engaging projection 13b, 13b concerning the manipulating piece 13 are provided symmetrically with regard to the center line L1, the movement thereof is stabilized in that it is avoided that the formal engaging projections 13b, 13b move with inclined condition. In the construction shown in Fig. 10, a formal engaging projection 14b' provided protrusively at the side wall outer surface 14 of the housing body A1' is formed in the shape of octagonal pillar, it causes the angle of the taper of the tapered engaging guide surface 13b1 at the formal engaging projection 13b of the insertion detecting member B1 to set properly thereby a voluntary insertion force and insertion feeling can be obtained. In the construction shown in Figs. 11 to 15, the manipulating piece 15 made of the frame body is provided both of main frame portion 6' of the insertion detecting member for terminal metal part B2, the manipulating piece 15 has a keeping shape frame portion 15' at upper half part and a resilient displacement frame portion 15" at lower half part. A provisional engaging projection 15a is formed at the outer side of the resilient displacement frame portion 15". A formal engaging projection 15b is formed at the outer side of the keeping shape frame portion. A provisional engaging projection 16a is formed in the supporting groove 17 extending to the back and forth at the lower part of the side wall outer surface 16 of the housing body A1 of the female connector A". The formal engaging projection 16b is formed at the step portion 18 provided opposite to the supporting groove 17 on the inside of upper part of the side wall outer surface. In the insertion detecting member B2, a tapered connecting guide surface 15a1 at the front in the direction of travel of the provisional engaging projection 15a and a vertical connecting surface 15a2 at the rear in the direction of travel of the provisional engaging projection 15a are formed. Vertical connecting surfaces 15b1, 15b2 are formed at the front and the rear of the formal engaging projection 15b respectively. A tapered connecting guide surface 16a2 at the front in the direction of back and forth of the housing body A1" at the provisional engaging projection 16a of the housing body A1" and a vertical engaging surface 16a1 at the rear in the direction of back and forth of the housing body A1" at provisional engaging projection 16a of the housing body A1" are formed. Vertical connecting surfaces 16b1, 16b2 are formed at the front and the rear of the formal engaging projection 16b respectively. A manipulating portion for fingers 15c is formed at the end portion of the keeping shape frame portion 15. In the above described constitution, at the provisional engaging condition of the insertion detecting member B2, the provisional engaging projection 15a of the resilient displacement frame portion 15" exposed at the side wall outer surface 16 from the window 10 of the step portion A3" and the hood portion A2" engages with the vertical connecting surface 16a1 of the provisional engaging projection 16a of the housing body A1. The formal engaging projection 15b of the keeping shape frame portion 15' engages with the vertical connecting surface 16b1 of the formal engaging projection 16b of the housing body A1". (referring to Figs. 12 and 14 ) It causes the manipulating piece 15 to pull out with it pushed downward by the manipulating portion 15c with fingers at this time, the formal engaging projections 15b climbs over the formal engaging projection 16b in that the resilient displacement frame portion 15" is deformed without difficulty by depression, when the depression is removed the formal engaging projection 15b is restored to its original state, and is engaged with the vertical connecting surface 16b2. There becomes the formal engaging condition. (referring to Figs. 13 and 15 ) In the above described construction, there is provided the keeping shape frame portion and resilient displacement frame portion for the frame-shape manipulating piece, the formal engaging projection is provided for the keeping shape frame portion so that it causes the engagement operation to ensure, and it is capable of being facilitated the movement from the provisional engaging position to the formal engaging position by means of resilient displacement frame portion. As described above, according to the present invention there are provided the connector equipped with the hood portion in front thereof, and the insertion detecting member for terminal metal part provided movably from the provisional engaging position to the formal engaging position in the hood portion. The resilient engaging piece to the terminal metal part is provided through the resilient displacement permissible space opposite to the terminal accommodating cavity formed at connector body portion of the connector. There are provided the insertion detecting body corresponding to the resilient displacement permissible space at the main frame portion of the insertion detecting member for terminal metal part and the pair of manipulating pieces at both side thereof. The insertion detecting member for terminal metal part causes the main frame portion to come into contact with the inside wall surface of the hood portion, moving freely. The pair of manipulating pieces are exposing both sides of the housing body portion from the window of the hood portion at the provisional engaging position, the insertion detecting body enters into the resilient displacement permissible space at the formal engaging position, therefore it is not necessary to enlarge the housing to keep the strength of the hood portion, the insertion detecting member for the terminal metal part is capable of being provide movably within the hood portion, and it can cause the insertion detecting member for terminal metal part of the provisional engaging position to move smoothly toward the formal engaging position by the pair of the manipulating portions.

Claims: A connector comprising a connector housing and an insertion detecting member (B, B', B1, B2) for detecting the position of a terminal metal part (C), wherein said connector housing has a housing body portion (A1, A1', A1'') and a hood portion (A2, A2', A2'') in front thereof to accomodate said insertion detecting member (B, B', B1, B2) therein, the housing body portion (A1, A1', A1'') being provided with a terminal accomodating cavity (1) having a resilient engaging piece (3) to engage the terminal metal part (C), said resilient engaging piece (3) existing between said terminal accomodating cavity (1) and a resilient displacement permissible space (4) opposite to said terminal accomodating cavity (1), and said hood portion (A2, A2', A2'') being provided with an inside wall surface and a pair of windows (10) directed to opposite sides of said housing body portion (A1, A1' , A1''), and said insertion detecting member (B, B', B1, B2) has a main frame portion (6, 6') being capable of coming into freely moveable contact with said inside wall surface and being provided with a pair of manipulating pieces (8, 8', 13, 15) on opposite sides thereof, and an insertion detecting body (7) provided on said main frame portion (6, 6') in an inserting direction of said insertion detecting member (B, B', B1, B2), wherein in a provisional engaging position, said insertion detecting member (B, B', B1, B2) provisionally engages said hood portion (A2, A2', A2'') in a state wherein said pair of manipulating pieces (8, 8', 13, 15) is exposed at the opposite sides of said housing body portion (A1, A1', A1'') from said pair of windows (10) of said hood portion (A2, A2', A2''), the resilient engaging piece (3) being permitted to be deflected into the resilient displacement permissible space (4) so as to enable said terminal metal part (C) to enter into said terminal accomodating cavity (1), and in a formal engaging position, said insertion detecting member (B, B', B1, B2) has proceeded further in its inserting direction so that the insertion detecting body (7) enters into said resilient displacement permissible space (4) so as not to permit the resilient engaging piece (3) to be deflected into the space (4). The connector according to claim 1, wherein each manipulating piece (8', 13, 15) is made of a resilient frame body, and a provisional engagement and a formal engagement are carried out between said manipulating piece (8', 13, 15) and said housing body portion (A1', A1''). The connector according to claim 2, wherein a pair of provisional engaging projections (13a) and a pair of formal engaging projections (13b) are provided symmetrically to said resilient frame body. The connector according to claim 3, further comprising a pair of formal engaging projections (14b, 14b') provided to said housing body portion (A1') oppositely to each other for the inside of said resilient frame body and being positioned correspondingly to a middle portion of said pair of formal engaging projections (13b) of said resilient frame body. The connector according to claim 4, wherein each formal engaging projection (14b') of said housing body portion (A1') is an octagonal pillar. The connector according to claim 2, wherein said manipulating piece (15) comprises a keeping shape frame portion (15') and a resilient displacement frame portion (15''), a provisional engaging projection (15a) being provided to said resilient displacement frame portion (15''), and a formal engaging projection (15b) being provided to said keeping shape frame portion (15').

Inventors: HANAZAKI HISASHI, OHTAKA KAZUTO, SAITO HITOSHI, SAKAI HIROSHI, HANAZAKI, HISASHI, OHTAKA, KAZUTO, SAITO, HITOSHI, SAKAI, HIROSHI, Hanazaki, Hisashi, Yazaki Parts Co., Ltd., Ohtaka, Kazuto, Yazaki Parts Co., Ltd., Saito, Hitoshi, Yazaki Parts Co., Ltd., Sakai, Hiroshi, Yazaki Parts Co., Ltd.
Applicants: YAZAKI CORP, YAZAKI CORPORATION
Application year: 1996
Main classification: H01R13
IPC codes: H01R13