JPH0418221Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention relates to a connector in which contacts housed in a housing are secondarily locked by a secondary locking portion that is integrated with the housing.

"Prior art" This type of conventional connector is shown in Figs. 18 and 19.
It was configured as shown in the figure. That is, a contact accommodating chamber 12 extending in the front-rear direction is formed in the rectangular parallelepiped-shaped housing 11, and a socket contact 13 is inserted into each contact accommodating chamber 12 from the rear and accommodated therein. Although not shown in the drawings, the contact 13 has a locking pawl that is locked to a stepped portion in the contact housing chamber 12 to prevent it from coming off. A cable 14 is connected to the rear end of the contact 13.

Openings 15 suitable for the contact accommodating chambers 12 are formed in the rear portions of the upper and lower surfaces of the housing 11, respectively, and a secondary locking portion 16 is arranged to close the openings 15. The front surface of the locking protrusion 17 formed on the inner surface of the secondary locking portion 16 closely opposes the back surface of the protrusion (stabilizer) 18 formed integrally with the contact 13, thereby preventing the contact 13 from coming off from the rear. In other words, secondary locking of the contacts 13 is achieved. The front edge of the secondary locking part 16 is integrally connected to the housing 11 by a hinge 19, and the secondary locking part 1
A locking pawl 21 formed on the rear inner surface of the housing 11 engages with a rear portion 22 formed on the housing 11, so that the opening 15 is kept covered by the secondary locking portion 16.

In this conventional connector, when the secondary locking part 16 is repeatedly opened and closed, stress is locally concentrated on the hinge 19, causing the hinge 19 to break or deteriorate.
In some cases, the second locking portion 16 could not be opened or closed. Also, if excessive force is applied to the secondary locking part 16 when packing or transporting the connector,
In some cases, the hinge 19 was damaged. Furthermore, when manufacturing the housing 11, the mold is manufactured with the secondary locking portion 16 open, so there is a drawback that the mold becomes large.

In addition, there is a device in which the secondary locking part is connected to the housing with a band as shown in Utility Model Application No. 61-168575, but in this case, the band is long and the band is more likely to come into contact with other objects, causing damage to the band. I was afraid.

"Means for Solving the Problem" According to this invention, an opening reaching the contact storage chamber is formed at the rear of the bottom of the housing, and a secondary locking part that closes the opening is detachably attached to the housing. Next, the back surface of the protrusion of the contact is engaged with the front surface of the locking portion to lock the contact, and the rear portions of the left and right side walls of the housing are expanded outward from each other, and a slit is formed from the rear at the bottom of the expanded portion. An engaging recess is formed from the front slightly below the slit, and an elastic engaging part that can be bent left and right and up and down is integrally formed, and a secondary locking part is formed in the engaging recess of these elastic engaging parts. Engagement claws integrally protruded from the left and right ends of the U-shaped band are inserted into and engaged with each other, and both ends of the U-shaped band are inserted into the bottom surfaces of both elastic engagement parts and the left and right ends of the secondary locking part, respectively. An insertion groove that is integrally connected and extends back and forth on the inner surface of the secondary locking portion facing each partition between the contact storage chambers is formed, and the groove width on the groove bottom side of the rear part of the insertion groove is is enlarged to form a groove recess, and a locking protrusion that is inserted into and engaged with the groove recess is formed protruding from a lower side surface of the rear portion of the partition wall.

In this way, according to the connector of this invention, the secondary locking part is connected to the housing with a U-shaped band, so even if the secondary locking part is repeatedly attached and detached, the band does not easily deteriorate, and it is easy to pack and transport. Even if the secondary locking part receives a shock inside, the band will not be easily damaged, and since the band is relatively short, there is less risk of it being hit by other objects, and the secondary locking part can be inserted forward rather than backward. To attach it to the housing in this way,
It has the ability to insert the contact to the correct position even if the contact is inserted halfway, and the locking between the housing and the secondary locking part is not only the locking between the elastic locking part and the locking claw, but also the locking between the partition wall and the secondary locking part. Since the contact is also engaged with the insertion groove, the holding force of the secondary engagement with respect to the housing is high, and it is possible to reliably prevent the contact from coming off from the rear.

``Example'' Figures 1 to 4 show a housing in an example of this invention, Figures 5 and 6 show the housing partially cut away and the contacts removed, Figures 7 and FIG. 8 shows the state in which the contacts are housed. The housing 31 has a substantially rectangular parallelepiped shape and is made of a synthetic resin molded product. A plurality of contact accommodating chambers 32 are formed in the housing 31 and are arranged on the left and right sides, extending in the front and rear of the housing 31 . As shown in FIGS. 5 and 6, each contact housing chamber 32 has a stepped portion 33 in the front-rear direction at the front portion of the upper surface of its inner surface.

A socket contact 34 is inserted into each contact housing chamber 32 from the rear thereof. At this time,
As shown in FIGS. 7 and 8, a locking pawl 35 cut and raised at the front end of the contact 34 is locked to the stepped portion 33 to prevent the contact 34 from coming off. Cable 3 connected to the rear end of the contact 34
6 is led out from the housing 31 rearward.

An opening 37 that reaches the contact housing chamber 32 is formed in the rear part of the bottom surface of the housing 31.
A secondary locking portion 38 is disposed opposite to the second locking portion 38 . Engagement pawls 39 are integrally formed on both left and right ends of the secondary locking portion 38 to protrude from each other. On the other hand, elastic engagement portions 41 that can be bent in the left-right direction are integrally formed on both left and right side surfaces of the housing 31. As shown in FIG. 4, the elastic engagement part 41 protrudes from the side surface of the housing 31, and has a slit 42 cut from the rear and extending in the front-rear direction, and an engagement recess 43 cut from the front to provide elasticity. It is made to be flexible.

The bottom surfaces of the left and right elastic engagement portions 41 and the secondary locking portion 3
A U-shaped band 44 is placed between the bottom surface of both left and right ends of 8.
are integrally formed. As will be made clear later, the left and right engaging claws 39 can be inserted into and engaged with the engaging recesses 43, respectively. A secondary locking portion 38 faces the partition wall 45 between adjacent contact storage chambers 32.
An insertion groove 46 that extends back and forth is formed on the inner surface side. The bottom surface of the rear end of the insertion groove 46 is a groove recess 47 , and a locking protrusion 48 to be inserted into the groove recess 47 projects from the bottom surface of the rear end of the partition wall 45 . A front end portion of the secondary locking portion 38 between the insertion grooves 46 is an insertion portion 49 inserted between the partition walls 45 of the housing 31 .

The secondary locking portion 38 is attached to the housing 31 in the following manner. First, as shown in FIGS. 9 and 10, insert the insertion portion 49 side of the secondary locking portion 38 into the opening 3.
7 into the contact housing chamber 32. Next, as shown in FIGS. 11 and 12, a first
Push the rear end of the secondary locking portion 38 into the contact housing chamber 32 as shown by the arrow in FIG. In this state, as shown in FIGS. 13 and 14, the front surface of the insertion portion 49 of the secondary locking portion 38 is closely opposed to the back surface of the protrusion (stabilizer) 51 of the contact 34, and the contact 34 is moved backward. Double-locked against slippage.

Also, at this time, the engaging claws 3 at both ends of the secondary locking part 38
9 elastically expands both the elastic engagement parts 41 of the housing 31 to the left and right, and then the 15th
As shown in FIG. 16, the engaging claw 39 is inserted. Further, as shown in FIGS. 13 and 14, the locking protrusion 4 of the partition wall 45 is inserted into the groove recess 47 of the secondary locking portion 38.
8 is inserted. Therefore, the secondary locking portion 38 is prevented from coming out of the housing 31 rearward, and is also locked in the vertical direction. Further, in this example, press-fit protrusions 52 are formed on both sides of every other locking protrusion 48, and the press-fit protrusions 52 are press-fitted into the groove recesses 47, so that the secondary locking parts 38 are attached to the housing 31 in the vertical direction. It is locked.

"Effect of the invention" As described above, in this invention, the housing 31 and the secondary locking part 38 are connected not by a hinge but by a band 44 that is a long hinge.
When attaching and detaching the secondary locking portion 38 to and from the housing 31, stress is not locally concentrated, and the band 44
is difficult to cut.

The secondary locking portion 38 can be easily attached to the housing 31, and at the same time, the contact 34 can be easily attached to the housing 31.
Even if it is in the half-inserted state as shown in Fig. 17,
The insertion portion 49 of the secondary locking portion 38 pushes the protrusion 51 of the contact 34, and the contact 34 can be inserted to its normal insertion position.

Since the secondary locking portion 38 is adjacent to the bottom surface of the housing 31 and the band 44 connects the bottom surface of the elastic engagement portion 41 and the secondary locking portion, the band 44
The width H (Fig. 2) can be made relatively large,
Moreover, since the length of the band 44 can be shortened, other objects are less likely to come into contact with the band 44, and there is no risk of damage even if impact is applied to the secondary locking part 38 during packaging or transportation.

Further, in the above example, the housing 31 and the secondary locking portion 38 are locked not only by the locking between the elastic locking portion 41 and the locking claw 39, but also by press-fitting or hooking between the partition wall 45 and the insertion groove 46. Since the secondary locking portion 38 has a high holding force against the housing 31, it is possible to reliably prevent the contact 34 from coming off from the rear.

[Brief explanation of the drawing]

FIG. 1 is a front view of the housing 31 used in the socket of this invention, FIG. 2 is a right side view thereof, FIG. 3 is a rear view of FIG. 1, FIG. 4 is a perspective view of FIG. 1, and FIG. The figure is a perspective view showing one half of the housing 31 and the contact 34, FIG. 6 is a sectional view thereof, FIG. 7 is a perspective view showing the contact 34 inserted into the housing 31, and FIG. 8 is a sectional view thereof. , No. 9
The figure is a perspective view showing the beginning of mounting the secondary locking part 38 on the housing 31, FIG. 10 is a sectional view thereof, and FIG.
12 is a sectional view thereof, FIG. 13 is a perspective view showing one half of the connector of this invention, and FIG. 14 is a sectional view thereof. Figure 15 is a right side view of this connector, Figure 16 is a rear view with the secondary locking part attached to the housing, and Figure 17 shows the half-insertion contact being inserted with the secondary locking part 38. A sectional view, Fig. 18 is an exploded view of a conventional connector, Fig. 19
The figure is a sectional view of a conventional connector.

Claims (1)

[Scope of Claim for Utility Model Registration] A rectangular parallelepiped housing is made of synthetic resin, and a plurality of contact housing chambers extending in the front and back direction are arranged on the left and right sides of the housing, and each of the contacts is housed in the rear part of the bottom of the housing. An opening reaching the chamber is formed, and a contact is inserted into each of the contact housing chambers from the rear, and each contact has a locking claw that engages with a stepped portion in the contact housing chamber to close the opening. A secondary locking part is removably attached to the housing, and the back surface of the protrusion of the contact is engaged with the front surface of the secondary locking part to lock the contact, and the rear part of the left and right side walls of the housing are enlarged outward from each other, a slit is formed from the rear at the bottom of the enlarged part, and an engagement recess is formed from the front slightly below the slit, and an elastic engagement part that can be bent left and right and up and down is integrated. and engaging claws integrally protruding from both left and right ends of the secondary locking portion are inserted into and engaged with the locking recesses of the elastic locking portions, respectively, and the bottom surfaces of both the elastic locking portions are formed. Both ends of a U-shaped band are integrally connected to both the left and right ends of the secondary locking part, and the ends of the U-shaped band are integrally connected to the left and right ends of the secondary locking part, and on the inner surface side of the secondary locking part, facing each partition between the contact storage chambers. An insertion groove extending back and forth is formed, the width of the groove bottom side of the rear part of the insertion groove is expanded to form a groove recess, and the lower part of the side surface of the rear part of the partition wall is inserted into and engaged with the groove recess. A connector with a protruding locking protrusion.