JPH10223299A - Block connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deformation of a locking part and make a connector compact. SOLUTION: A dovetail groove-shaped locking groove 21 is formed over the whole width on the front end side on the upper surface of a lower side housing 2, and a dovetail-shaped locking rib 22 which is capable of fitting by applying pressure to the locking groove 21 is formed on the lower surface of an upper side housing 1. The locking rib 22 is divided into three, so as to have gaps between and differing projecting heights. The locking groove 21 is formed so as to have step differences. A recess 32 for constituting a jig insertion hole is formed, so as to correspond to a gap in the midway part of the locking rib 22. By inserting the locking rib 22 into the locking groove 21 with applied pressure, they are locked. From the assembly state, a disassembling jig is inserted into the jig insertion hole, the front end sides of upper and lower housings 1, 2 are separated, the locking rib 22 is guided by an inclined side surface, and removed from the locking groove 21. Continuing further, the front end side of the upper side housing 1 is rotated, and rear side lock is also unlocked.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a block connector formed by stacking a plurality of housings.

[0002]

2. Description of the Related Art As an example of a conventional block connector,
The thing shown in FIG. 25 is known. This connector is constructed by stacking connector housings a in three stages, and the rear half of the upper surface of each housing a is opened so as to perform a pressure welding operation of electric wires with terminal fittings (not shown) incorporated therein. ing. In the upper housing a of the housings a that are overlapped with each other, locking pieces b project downward from the front and rear ends of the left and right side surfaces, respectively. Are formed so as to correspond to each other, and when the respective housings a are overlapped, the locking pieces b are elastically locked to the locking protrusions c of the housing a located thereunder. Thus, the respective housings a are connected to each other, and an integrated block connector is assembled. When the block connector is disassembled for maintenance or the like, the jigs are used to open the locking pieces b and detach them from the locking projections c to separate the housings a.

[0003]

By the way, in the conventional block connector, a lock portion for holding the overlapping housings a in a connected state is provided so as to be exposed on the outer surface of the housing a. In this case, there is a problem that the locking piece b may be deformed or damaged, and a protrusion may be formed on a side surface of the connector, thereby increasing the width of the connector. An object of the present invention is to provide a block connector provided with a lock means in order to solve the above-mentioned problems.

[0004]

According to a first aspect of the present invention, there is provided a block connector formed by stacking a plurality of housings. Is characterized in that a rib and a groove which are releasably engaged with each other are formed so as to linearly cross the alignment surface.

According to a second aspect of the present invention, in the first aspect of the present invention, the rib is formed in a divided shape with a gap in a longitudinal direction, and a jig for a disassembling operation is provided at a position corresponding to the gap. The feature is that the configuration is such that the insertion portion is provided. According to a third aspect of the present invention, in the first or second aspect of the invention, the rib and the groove are formed in a step shape having a height or a depth that changes in the middle of the length direction. It has features.

According to a fourth aspect of the present invention, in the first, second or third aspect of the present invention, one of the rib and the groove has a constant cross-sectional shape over its entire length, while the other has a cross-sectional shape. A part of the side edge is cut off, a clearance fit is formed between the rib and the groove through the cutout portion, and an interference fit is formed between the rib and the groove through the non-cutout portion. Is characterized in that it is configured.

According to a fifth aspect of the present invention, in the first, second or third aspect of the present invention, the rib and the groove are set so as to form an interference fit, and
At least one of the side walls of the groove is slit along the length direction, and the rib is configured to allow narrow width deformation and the groove allows widening deformation. Having.

[0008]

Actions and effects of the present invention

<Invention of Claim 1> The ribs are press-fitted into the grooves and latched, so that the two housings are assembled together, and when an external force is applied to expand the space between the two housings, the ribs come out of the grooves while coming out of the grooves. The housing is disassembled. Since the locking means is set on the matching surface of the housing and is not exposed to the outside, it is prevented from being accidentally deformed or damaged, and the locking means does not protrude from the outer surface of the housing, so the whole is compact as a whole Can be summarized. Moreover, since the rib and the groove are provided so as to cross the alignment surface linearly, a large locking area is taken,
The holding power can be increased. Further, since the ribs have high strength, they are not likely to be deformed even during transportation before assembly.

<Invention of Claim 2> By performing the operation of inserting the jig into the insertion portion and widening the space between the two housings, the ribs can be pulled out of the grooves to disassemble the two housings. The operation of disassembling the housing can be easily performed. <Invention of claim 3> By abutting on the stepped portion, lateral displacement between the superposed housings can be prevented.

<Invention of Claim 4> By providing a portion forming an interference fit between the rib and the groove, both housings are reliably prevented from rattling in the width direction of the rib and the groove. On the other hand, since a portion that forms a clearance fit is also provided by providing the cutout portion, it is possible to reduce press input as a whole.

<Invention of Claim 5> When the rib is press-fitted into the groove, the rib is deformed to have a narrow width so as to close the slit, or the groove is also deformed to widen so as to close the slit. It is pushed in with elastic deformation. After being pushed in, the rib and the groove are elastically tightly fitted by being restored and deformed. While suppressing the press input to a small value, it is possible to reliably prevent the two housings from rattling in the width direction of the rib and the groove.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Various embodiments of the present invention will be described below with reference to the accompanying drawings. <First Embodiment> First, a first embodiment of the present invention will be described with reference to FIGS. The block connector of this embodiment is a female connector. As shown in FIGS. 1 and 2, an upper housing 1 and a lower housing 2 are stacked, and a cover 3 is attached to the lower surface of the lower housing 2. Be composed. Both housings 1 and 2 are female terminal fittings 4
Is press-fitted to the electric wire W (see FIG. 7) in a state where it is assembled in the cavity 5.

The female terminal fitting 4 assembled to each of the housings 1 and 2 will be briefly described. The female terminal fitting 4 is formed by bending a conductive thin metal plate, and a connecting portion 8 is formed on the front side (the front side in FIG. 1) into which the tab of the mating male terminal fitting is inserted. In addition, a press-contact portion 9 for pressing the core wire of the electric wire W and a barrel 10 for caulking the coating of the electric wire W are sequentially formed.

The upper housing 1 is formed of a synthetic resin material, and a plurality of cavities 5 are formed in the interior of the upper housing 1 in a horizontal line, and the female terminal fittings 4 described above are provided on the rear side (the back side in FIG. 1). It is designed to be inserted and assembled. The rear half of the lower surface of the upper housing 1 is open, and a pressure welding jig (not shown) is inserted into each of the cavities 5 through this opening. Pressure welding work can be performed.

A lock arm 12 is formed on the upper surface of the upper housing 1 in a cantilever manner.
2, a lock projection 13 that can be engaged with the mating connector housing and a release operation unit 14 that bends to unlock the mating connector are formed. Protective walls 15 are formed on both left and right edges of the upper surface to prevent foreign substances from entering the lower side of the lock arm 12. A warp restricting portion 16 is formed for restricting the warp in the direction opposite to the bending direction.

The lower housing 2 is also formed of a synthetic resin material, and has a plurality of cavities 5 arranged in a row in the same manner as the upper housing 1. In each cavity 5, the female terminal fitting 4 is inserted and assembled from the rear side. The lower housing 2 also has an opening in the rear half of the lower surface in the same manner as the upper housing 1, and the pressing jig can be inserted into each cavity 5 through this opening. The pressure welding work of the electric wire W can be performed with the terminal fitting 4 assembled. On the upper surface of the lower housing 2, a plurality of ribs 18 facing in the front-rear direction are arranged in parallel.
Each rib 18 presses and holds the electric wire W pressed into contact with the female terminal fitting 4 incorporated in the upper housing 1 by being overlapped on the lower surface of the upper housing 1.

The cover 3 is made of a synthetic resin material and has a size to close the opening of the lower housing 2.
A plurality of vertical ribs 18 are arranged on the upper surface. When the cover 3 is mounted at a position that closes the opening of the lower housing 2, each rib 18 presses the electric wire W pressed against each female terminal fitting 4 assembled in the lower housing 2. I have.

Next, a lock mechanism between the upper housing 1 and the lower housing 2 will be described. In this embodiment, lock portions are provided at two places on the front side and the rear side. First, the structure of the front lock portion will be described. As shown in FIG. 3, the upper surface of the lower housing 2 has a dovetail-shaped locking groove 21 at a position within a predetermined dimension from the fitting surface.
Are formed over the entire width. On the other hand, at a corresponding position on the lower surface of the upper housing 1, a locking rib 22 having a dovetail shape capable of being pressed into the locking groove 21 is formed.
However, as shown in FIG. 2, the locking rib 22 is divided into three parts while leaving a gap 23 of a predetermined size, and the dividing rib 22A at the center is connected to the dividing rib 22B at both ends. It is formed with a lower protruding height. Correspondingly, on the locking groove 21 side, a central portion is formed in a stepped shape with a depth smaller than both end portions. As shown in FIG. 4, the shallow portion 24 is formed in an area between the inner end face of the split rib 22B at both ends and a position corresponding to the inner end face.

That is, when the locking ribs 22 are fitted into the locking grooves 21 in a state where the locking ribs 22 are press-fit into the locking grooves 21 and their removal is regulated, and when an external force is applied to separate the upper and lower housings 1 and 2, the locking ribs 22 are engaged. The stop ribs 22 and the oblique side surfaces 26 of the locking grooves 21,
The locking rib 22 can be pulled out from the locking groove 21 while being guided by 27 and elastically expanding the opening edge of the locking groove 21. That is, it has a semi-lock structure in which the inclined side surfaces 26 and 27 are also used as a locking surface and a release guide surface.

Next, the structure of the rear lock portion will be described. On both left and right edges of the rear end of the upper surface of the lower housing 2, a housing portion 28 for housing rear ends of the left and right side walls of the upper housing 1 is formed. A locking hole 29 having a shape is formed. On the other hand, locking projections 30 that can be fitted into the locking holes 29 are formed at the rear end portions on both left and right sides of the upper housing 1. As shown in FIG. 6, the locking projection 30 has a locking surface 30 </ b> A that projects substantially perpendicularly from the side surface of the upper housing 1.
And a guide surface 30B inclined downward. In addition, a C surface 30C is formed at a corner between the locking surface 30A and the guide surface 30B, and the C surface 30C is formed.
The leading edge portion at C is cut off obliquely and the release guide surface 30
D is formed. Note that the release guide surface is the locking projection 30.
It may be provided not on the side but on the locking hole 29 side.

Therefore, when the upper housing 1 is stacked on the lower housing 2, the locking projections 30
9 is elastically fitted and locked. Also, the locking projection 30
With the above structure, when the two housings 1 and 2 are rotated in the direction of separating the rear end from the center, the locking projection 30 comes out of the locking hole 29 while being guided by the release guide surface 30D. It has become. In this case, the center of rotation may be any position as long as it is behind the locking projection 30. In other words, the rotation center may be any position at which the locking projection 30 and the locking hole 29 can be separated from each other by a rotating operation.

At the front edge of the upper surface of the lower housing 2, there are formed two diagonally notched concave portions 32 on the left and right sides. A jig insertion hole 33 for inserting the disassembly jig G is formed as shown in FIG. Each jig insertion hole 33 is provided at a position corresponding to the front of each of the gaps 23 of the divided ribs 22A and 22B.

At the left and right ends of the rear end of the cover 3, there are formed receiving portions 35 for receiving the rear ends of the left and right side walls of the lower housing 2. A locking hole 36 is formed in the outer wall of the housing 35, and when the cover 3 is mounted at a position that closes the opening of the lower housing 2, locking protrusions formed on the left and right sides of the lower housing 2 are formed. 37 is fitted.

The first embodiment has the above-described structure, and its operation will be described below. First, to assemble the block connector, connect the female terminal fitting 4 to each housing 1,
Then, the electric wire W is pressed against each of the female terminal fittings 4 by using a pressing jig. The electric wire W pressed into contact with the female terminal fitting 4 is pulled out from the rear surface of each of the housings 1 and 2.

Then, when the upper housing 1 is stacked on the upper surface of the lower housing 2, as shown in FIG.
B is press-fitted into the locking groove 21 of the lower housing 2 while expanding the opening edge. On the other hand, on the rear side, the locking projection 30 of the upper housing 1 is guided by the guide surface 30B and fits into the locking hole 29, and the locking surface 30A is locked to the upper edge of the locking hole 29. Thereby, both housings 1 and 2 are held in a stacked state. And the lower housing 2
By attaching the cover 3 to the lower surface of the block connector, assembling work of the block connector is completed as shown in FIG. In the assembled state, as shown in FIG. 5, the split ribs 22B on both sides abut the stepped surface 25 of the locking groove 21,
Lateral displacement between the upper and lower housings 1 and 2 is prevented.

When the block connector assembled as described above is disassembled from the necessity of repair or the like, the following is performed. First, as shown in FIG. 7, the tip of the disassembling jig G is inserted into the jig insertion hole 33. Then, as shown in FIG. 8, the disassembling jig G is pryed to lift the upper housing 1. Then, the front end sides of both housings 1 and 2 are displaced in a direction in which they are separated from each other. Here, behind the jig insertion hole 33, a gap 2 between the divided ribs 22A and 22B is provided.
When the disassembly jig G is further squeezed while being inserted into the gap 23, the two housings 1 and 2 are separated more efficiently. As a result, the locking rib 22 is guided by the inclined side surfaces 26 and 27 and escapes from the locking groove 21 while widening the opening edge, and the lock between the locking rib 22 and the locking groove 21 is released.

Subsequently, as shown in FIG. 9, the two housings 1 and 2 are pivoted about their rear ends so as to further open the pry open front ends. Then, as shown in FIG. 10, the locking projection 30 provided on the rear end side is guided by the release guide surface 30 </ b> D, and comes out of the locking hole 29. Thereby, the engagement between the locking projection 30 and the locking hole 29 on the rear end side is also released, and the housings 1 and 2 can be completely separated. Thus, the disassembling operation of the two housings 1 and 2 is completed.

As described above, according to the first embodiment, the following advantages can be obtained. In the front locking portion, the locking means (locking rib 22 and locking groove 21) are set on the matching surfaces of the upper and lower housings 1 and 2 and are not exposed to the outside. Is prevented. In addition, since the locking means does not protrude from the side surfaces of the housings 1 and 2, the width direction can be compacted accordingly. Since the locking ribs 22 and the locking grooves 21 are provided over the entire width, a large locking area is provided, and a high holding force can be obtained even in a semi-lock structure. In addition, since the connector is also connected at the center portion in the width direction of the alignment surface, even if the connector has a large width, for example, there is no gap between the two housings at the center portion.

Further, since the jig insertion hole 33 is provided, the operation of separating the housings 1 and 2 to release the front lock can be easily performed. Moreover, since the gap 23 is provided in the middle of the locking rib 22 corresponding to the jig insertion hole 33, the disassembly jig G
Can be inserted deeper and the prying operation can be performed in the immediate vicinity of the locking rib 22, so that the detaching operation of the housings 1 and 2 can be performed efficiently.

Further, since the locking means are provided at the front and rear ends of the housings 1 and 2, respectively, the housings 1 and 2 can be more reliably held in an overlapped state.
Moreover, even in such a case, after the front lock portion is unlocked by the operation of the disassembling jig G, the rear lock portion can be unlocked by rotating the front end of the released upper housing 1. The disassembling operation can be easily performed. Since the jig insertion hole 33 is formed on the fitting surface side and is on the opposite side to the side from which the electric wire W is drawn out, the disassembling jig G
When performing the disassembling operation or the rotation operation of the front end portion, the electric wire W does not interfere, and the disassembling operation can be easily performed even when the electric wire W is connected. Further, since the locking rib 22 and the locking groove 21 are formed in a stepped shape, it is possible to effectively prevent a lateral displacement between the upper and lower housings 1 and 2 in an assembled state.

<Second Embodiment> FIG. 11 shows a second embodiment of the present invention. In the second embodiment, the sectional shapes of the locking grooves and the locking ribs are changed, and the locking grooves 41 and the locking ribs 42 are inclined surfaces 43 and 44 only on one side surface.
Are formed. The inclined surfaces 43 and 44 serve both as a locking surface and a release guide surface. The same operation and effect as in the first embodiment can be obtained.

Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIGS. The block connector according to the third embodiment is configured by stacking an upper housing 101 and a lower housing 102 and mounting a cover 103 on the lower surface of the lower housing 102 as shown in FIGS. The other structure except for the lock portion is the same as that of the first embodiment.
Portions having the same function are denoted by the same reference numerals, and redundant description will be omitted. The lock portion will be described below.

In this embodiment, lock portions are provided at two positions on the front side and the rear side. First, the structure of the lock portion on the rear side will be described. On both left and right edges at the rear end of the upper surface of the lower housing 102, there are formed accommodation portions 120 for accommodating the rear ends of the left and right side walls of the upper housing 101,
A rectangular locking hole 1 is formed in an outer wall 121 of the accommodation portion 120.
22 are formed. On the other hand, locking projections 124 that can be fitted into the locking holes 122 are formed at the rear ends of the left and right side surfaces of the upper housing 101. The locking protrusion 124 is provided with a locking surface 125 projecting substantially perpendicularly from the side surface of the upper housing 101 and a guide surface 126 inclined downward. Therefore, when the upper housing 101 is stacked on the lower housing 102, the outer wall 121 of the housing portion 120 is pushed in while being bent and deformed along the guide surface 126, and when pushed to a predetermined position, the wall 121 is restored and deformed. The locking projection 124 is fitted into the locking hole 122 while being locked by the locking surface 125.

Next, the structure of the front lock portion will be described. On the upper surface of the lower housing 102, at a position that is a predetermined dimension from the mating surface with the mating connector housing, as shown in FIG. 14, a dovetail groove gradually increasing in the depth direction is formed. A locking groove 128 is formed over the entire width of the lower housing 102. The cross-sectional shape of the locking groove 128 is the same over the entire length.

On the other hand, at a position corresponding to the lower surface of the upper housing 101, a locking rib 130 that can be fitted into the locking groove 128 is formed. The locking rib 130 as a whole has a dovetail shape gradually increasing in the protruding direction, and is set so as to form an interference fit between the locking rib 130 and the locking groove 128. More specifically, the locking rib 130 is divided into five divided ribs as shown in FIG. Of the five split ribs, 3 at the center and both ends
In the divided rib 131A, a cutout surface 133 is formed by cutting a predetermined length of the side surface on the far side in the width direction. In the remaining two divided ribs 131B, the side surface on the front side is cut out by the same dimension in the width direction to form a cut surface 133.

For this reason, in the entire locking rib 130, cut surfaces 133 are alternately provided at the side edges on the back side and the near side, and the locking ribs 130 are locked by the non-cut surfaces 134 on both sides of the adjacent divided ribs 131A and 131B. An interference fit is formed between the groove and the groove 128. The locking ribs 130 are fitted into the locking grooves 128 in a state in which removal is restricted by being press-fitted into the locking grooves 128. When an external force is applied to separate the upper and lower housings 101 and 102, the locking ribs 130 are engaged. And the corresponding oblique side surface 12 of the locking groove 128
9, the locking rib 130 can be pulled out of the locking groove 128, that is, the non-removed surface 134 of the locking rib 130 and the side surface 129 of the locking groove 128 are connected to the locking surface and the release guide surface. The semi-lock structure is also used for

At the left and right ends of the rear end of the cover 103, there are formed receiving portions 120 for receiving the rear ends of the left and right side walls of the lower housing 102. A locking hole 122 is formed in an outer wall 121 of the housing portion 120,
When the cover 103 is mounted at a position that closes the opening of the lower housing 102, locking projections 124 formed on both left and right side surfaces of the lower housing 102 are fitted.

The third embodiment has the above structure, and its operation will be described below. To assemble the block connector, connect the female terminal fitting 4 to each housing 10.
The electric wire W is press-fitted to each of the female terminal fittings 4 using a press-fitting jig. The electric wire W pressed into contact with the female terminal fitting 4 is pulled out from the rear surface of each of the housings 101 and 102. When the upper housing 101 is stacked on the upper surface of the lower housing 102, the locking protrusion 124 of the upper housing 101 is guided by the guide surface 126 and fits into the locking hole 122 on the rear side, as described above. The locking surface 125 is locked on the upper edge of the locking hole 122.

On the other hand, on the front side, the locking rib 130 is pressed into the locking groove 128 as shown by the arrow in FIG. At this time, as shown in FIG. 3B, the non-cut surface 134 of each of the divided ribs 131A and 131B hits the corresponding opening edge of the locking groove 128, and the opening edge is widened. 131B is press-fitted while being bent and deformed on the side where the cut surface 133 is provided. Then, when the upper and lower housings 101 and 102 are overlapped, the locking ribs 130 fit completely into the locking grooves 128 as shown in FIG.
The non-cut surface 134 is elastically pressed against the corresponding side surface 129 of the locking groove 128 while the A and 131B are restored and deformed. That is, the locking rib 130 is connected to the adjacent divided rib 13.
The non-cut surfaces 134 on both sides of 1A and 131B are fitted in a tight fit with the locking groove 128, and the upper and lower housings 101 and 102 are assembled without rattling in the front-rear direction. Then, by attaching the cover 103 to the lower surface of the lower housing 102, the assembling work of the block connector is completed as shown in FIG.

When disassembling the block connector assembled as described above from the necessity of repair or the like, the following is performed. First, using a disassembly jig (not shown), the wall 121 of the housing portion 120 constituting the rear lock portion is opened to release the locking projection 124 from the locking hole 122, and the upper and lower housings 101 and 102 are simultaneously removed. A force is exerted so as to pull them apart. Then, each divided rib 131
A and 131B are pulled out from the locking groove 128 while the non-removed surface 134 is guided by the corresponding side surface 129 of the locking groove 128 and is deformed to the side where the cut surface 133 is provided.
Thereby, the lock between the locking rib 130 and the locking groove 128 is also released, and the upper and lower housings 101 and 102 can be separated and disassembled.

According to the third embodiment, the following advantages can be obtained. The front locking portion has a structure in which the locking ribs 130 and the locking grooves 128 provided over the entire widths of the alignment surfaces of the upper and lower housings 101 and 102 are connected to each other. Both housings 101, 10 in the center
There is no gap between the two. Further, because of the semi-lock structure, the housings 101 and 102 can be disassembled by pulling out the locking rib 130 from the locking groove 128 by applying an external force of a predetermined value or more to the housings 101 and 102 in the separating direction. .

Further, adjacent divided ribs 131A, 131B
Is formed between the non-removed surfaces 134 on both sides of the locking groove 128 and the locking groove 128, the locking rib 130 does not shift in the width direction within the locking groove 128, that is, the upper and lower housings 101, 102 is prevented from rattling in the front-back direction. On the other hand, the locking rib 130 has the locking groove 12.
8 is provided with a cut-off surface 133 which forms a clearance fit, and is divided into five divided ribs 131A and 131B and can be flexibly deformed, so that the press-in force as a whole can be suppressed to be small.

<Fourth Embodiment> FIG. 17 shows a fourth embodiment of the present invention. In the fourth embodiment, as in the third embodiment, a locking groove 128 having the same cross-sectional shape and a groove shape is formed over the entire width of the upper surface of the lower housing 102, as in the third embodiment. At a corresponding position on the lower surface of the upper housing 101, a barbed locking rib 140 that can be fitted into the locking groove 128 is formed. The locking rib 140 is set so as to form an interference fit between the locking rib 128 and the locking groove 128 as a whole, and is divided into five regions along the length direction. In the three regions 141A, the rear side surface is cut out by a predetermined size in the width direction to form a cut surface 133. In the remaining two regions 141B, the front side surface is cut out by the same size in the width direction to cut the cut surface 133. Are formed.

Therefore, in this locking rib 140, the cut surfaces 133 are provided alternately at the side edges on the back side and the near side, and the non-cut surfaces 1 on both sides of the adjacent regions 141A and 141B.
34 forms an interference fit with the locking groove 128. A semi-lock structure is used in which the non-removed surface 134 of the locking rib 140 and the side surface 129 of the locking groove 128 also serve as a locking surface and a release guide surface.

The operation of the fourth embodiment is as follows. When the locking rib 140 is press-fitted into the locking groove 128, each of the non-removed surfaces 134 of the locking rib 140 faces the locking groove 12.
8 are pushed in while spreading against the corresponding opening edges. In a state where the upper and lower housings 101 and 102 are overlapped, the adjacent regions 141A and
The locking groove 128 is formed by the non-cut surfaces 134 on both sides of
And the upper and lower housings 101 and 102 are assembled without rattling in the front-rear direction. On the other hand, on both sides of the locking ribs 140, the cut surfaces 133 constituting the clearance fit are provided alternately.
Press-in is reduced as much as possible.

<Fifth Embodiment> FIGS. 18 and 19 show a fifth embodiment of the present invention. In the fifth embodiment, contrary to the third and fourth embodiments, the cross-sectional shape of the locking groove 146 is changed to form a gap fitting portion. That is, over the entire width of the lower surface of the upper housing 101, the locking rib 144 having the same cross-sectional shape is formed over the entire length. On the other hand, at the corresponding position on the upper surface of the lower housing 102, the locking rib 14 is provided.
4 is formed with a groove-shaped locking groove 146 that can be fitted. The locking groove 146 is provided with a locking rib 144 as a whole.
And is configured to form an interference fit between them, and is divided into left and right regions from the center in the length direction,
In the right region 147A viewed from the front, the front side is cut in the width direction to form a cut surface 148, and in the left region 147B, the back side is cut in the width direction to the same size and the cut surface 148 is formed. Are formed.

Therefore, in the locking groove 146, the cut surfaces 148 are provided alternately at the front and rear side edges, and the remaining non-cut surfaces 149 form a tight fit between the locking groove 144 and the locking rib 144. Will be done. Then, the side surface 145 of the locking rib 144 and the non-cut surface 14 of the locking groove 146 are formed.
9 has a semi-lock structure that also serves as a locking surface and a release guide surface.

The operation of the fifth embodiment is as follows. As shown in FIG. 19A, when the locking rib 144 is press-fitted into the locking groove 146, the side edge of the locking rib 144 hits the opening edge of the locking groove 146 on the non-removed surface 149 side and spreads it. Pushed while pushing. Upper and lower housing 10
In the state in which the first and second superposed portions 1 and 2 are overlapped with each other, as shown in FIG. The housings 101 and 102 are assembled without play in the front-rear direction. On the other hand, since the cut surfaces 148 forming the clearance fit are provided alternately on both sides of the locking groove 146, the press input is reduced as much as possible.

The left and right regions 147A and 147B of the locking groove 146 may be provided in a divided manner with a partition wall interposed therebetween. In such a case, it is necessary to divide the mating rib 144 into right and left so as to allow the partition wall to escape, so that the divided rib can be press-fit into the cutout surface 148 side of the locking groove 146 while being flexibly deformed. As a result, the press-in force can be further reduced.

<Sixth Embodiment> FIG. 20 shows a sixth embodiment of the present invention. In the sixth embodiment, the locking groove 128 is formed to have the same cross-sectional shape over the entire length, while the locking rib 150 is formed so as to gradually increase in width from one end to the other end. I have. Therefore, the locking rib 1
A gap fit is formed between the narrow side 50 and the locking groove 128, and an interference fit is formed on the wide side. Therefore, when the locking rib 150 is press-fitted into the locking groove 128, the two housings 101 and 102 are prevented from rattling by being fitted in a tightly fitted state on the wide side of the locking rib 150. Since the narrower width of the locking rib 150 is fit into the gap, the overall pressure input can be reduced.

In contrast to the sixth embodiment, the ribs are formed in the same cross-sectional shape over the entire length, while the locking grooves are
It is formed so that the width gradually increases from one end side to the other end side, a clearance fit is formed between the wide side of the locking groove and the rib, and an interference fit is configured on the narrow side. You may. Similar effects can be obtained. Further, the same effect can be obtained by sequentially changing the protruding length of the locking rib and the depth of the locking groove in the length direction.

<Seventh Embodiment> Next, a seventh embodiment of the present invention will be described with reference to FIGS. This seventh
In the embodiment, both the locking groove 160 and the locking rib 161 are formed to have the same cross-sectional shape over the entire length, and are set to form an interference fit. In addition, a slit 162 opened on the protruding surface is cut over the entire length at the center in the width direction of the locking rib 161.

In the seventh embodiment, when the locking rib 161 is pressed into the locking groove 160 as shown by the arrow in FIG. 22A, the locking rib 161 hits the opening edge of the locking groove 160. Thereafter, as shown in FIG. 13B, the locking rib 161 is pushed in while being elastically narrowly deformed so as to crush the slit 162. And the upper and lower housings 101, 1
02 is superimposed, as shown in FIG.
The locking rib 161 is restored and opened, and its side surface 163 is elastically pressed against the corresponding side surface 164 of the locking groove 160. As a result, the locking rib 161 fits into the locking groove 160 without rattling, and the upper and lower housings 101 and 1 are fitted.
02 is prevented from rattling in the front-rear direction.
By being able to flex and deform the 61 over its entire length, the press-in force can be reduced.

<Eighth Embodiment> FIGS. 23 and 24 show an eighth embodiment of the present invention. In the eighth embodiment, both the locking groove 170 and the locking rib 171 are formed to have the same cross-sectional shape over the entire length, and are set to form an interference fit. In addition, both side walls 17 of the locking groove 170
2, a slit 173 opened in the alignment surface is cut over the entire length.

In the eighth embodiment, when the locking rib 171 is pressed into the locking groove 170 as shown by the arrow in FIG. 24A, the locking rib 171 hits the opening edge of the locking groove 170. Thereafter, as shown in FIG. 13B, the side wall portion 172 is deformed outward while crushing the slit 173, that is, the side wall portion 172 is pushed in while the elastic groove 170 is elastically widened. Then, in a state where the upper and lower housings 101 and 102 are overlaid, as shown in FIG.
Is restored and closed, and its side surface 174 is
Are elastically clamped. As a result, the locking rib 171 fits into the locking groove 170 without rattling, preventing rattling of the upper and lower housings 101 and 102 in the front-rear direction, and elastically extending the locking groove 170 over the entire length. Since the width can be increased, the press-in force can be reduced. Note that the slit 173 is provided on one of the side wall portions 1.
Even if it is provided at 72, it is effective to reduce the press-in force.

<Other Embodiments> The present invention is not limited to the embodiments described above with reference to the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition, various changes can be made without departing from the scope of the invention. (1) The shape of the locking rib and the locking groove is not limited to the shape of the dovetail and the dovetail groove, but the point is that the locking rib has a cross-sectional shape having a portion that becomes gradually wider in the protruding direction. The groove may have any cross-sectional shape that has a portion that gradually becomes wider in the depth direction. (2) Contrary to the above embodiments, the locking groove may be provided in the upper housing and the locking rib may be provided in the lower housing.

(3) The locking groove and the locking rib need not always be provided over the entire width, but may be provided at appropriate positions in the width direction. (4) In the first embodiment, when the gap between the jig insertion hole and the dividing rib is provided in a communicating manner, the disassembling jig can be inserted deep from the beginning, and the disassembling operation can be performed more efficiently. be able to.

(5) In the case where the matching surface of the housing is almost entirely closed, such as a block connector in which a crimp terminal is inserted, a locking groove and a locking rib are provided on both front and rear sides of the housing. It is also possible to employ a lock mechanism. (6) The present invention can be similarly applied to the male block connector.

[Brief description of the drawings]

FIG. 1 is a perspective view of a block connector according to a first embodiment of the present invention before being assembled.

FIG. 2 is a front view thereof.

FIG. 3 is a partial side view showing a state in which a locking groove and a locking rib are separated from each other.

FIG. 4 is a sectional view thereof.

FIG. 5 is a cross-sectional view of a state in which a locking rib is pressed into a locking groove.

FIG. 6 is a perspective view showing a locking projection of a locking portion on the rear end side.

FIG. 7 is a perspective view of the block connector in an assembled state.

FIG. 8 is a side view showing a release operation by the disassembly jig.

FIG. 9 is a side view showing a rotation operation.

FIG. 10 is an enlarged perspective view showing a part of the locking projection on the rear end side where the locking projection comes off.

FIG. 11 is a sectional view of a locking groove and a locking rib according to a second embodiment.

FIG. 12 is a perspective view of a block connector according to a third embodiment of the present invention before assembly.

FIG. 13 is a front view thereof.

FIG. 14 is an exploded perspective view showing a structure of a locking groove and a locking rib.

FIG. 15 is an enlarged side view illustrating a press-fitting operation.

FIG. 16 is a perspective view of the block connector in an assembled state.

FIG. 17 is an exploded perspective view illustrating a structure of a locking groove and a locking rib according to a fourth embodiment.

FIG. 18 is an exploded perspective view showing a structure of a locking groove and a locking rib according to a fifth embodiment.

FIG. 19 is an enlarged side view illustrating the press-fitting operation.

FIG. 20 is an exploded perspective view showing a structure of a locking groove and a locking rib according to a sixth embodiment.

FIG. 21 is an exploded perspective view showing a structure of a locking groove and a locking rib according to a seventh embodiment.

FIG. 22 is an enlarged side view for explaining the press-fitting operation.

FIG. 23 is an exploded perspective view showing a structure of a locking groove and a locking rib according to an eighth embodiment.

FIG. 24 is an enlarged side view illustrating the press-fitting operation.

FIG. 25 is an exploded perspective view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Upper housing 2 ... Lower housing 21 ... Locking groove 22 ... Locking rib 22A, 22B ... Split rib 23 ... Gap (between split ribs 22A and 22B) 25 ... Stepped surface (of locking groove 21) 32 recessed part 33 jig insertion hole G disassembly jig 41 locking groove 42 locking rib 101 upper housing 102 lower housing 128 locking groove 130 locking rib 131A, 131B split rib 133 ... cut surface 134 ... non-cut surface 140 ... locking rib 144 ... locking rib 146 ... locking groove 148 ... cut surface 149 ... non-cut surface 150 ... locking rib 160 ... locking groove 161 ... locking rib 162 ... slit 170: locking groove 171: locking rib 172: side wall portion 173: slit

Claims (5)

[Claims] 1. A block connector constituted by stacking a plurality of housings, wherein a releasably engaging rib and a groove linearly cross the alignment surfaces on alignment surfaces of the housings which are overlapped with each other. A block connector characterized by being formed in. 2. The method according to claim 1, wherein the rib is formed in a divided shape with a gap in the length direction, and an insertion portion of a jig for disassembling operation is provided at a position corresponding to the gap. The block connector according to claim 1. 3. The block connector according to claim 1, wherein the rib and the groove are formed in a stepped shape whose height or depth changes in the middle of the length direction. 4. One of the rib and the groove has a constant cross-sectional shape over the entire length, while the other has a part of a side edge cut off, and the rib is cut through the cut part. 3. A clearance fit is formed between the rib and the groove, and an interference fit is formed between the rib and the groove via a non-cut portion. 3. The block connector according to 3. 5. A slit is formed between the rib and the groove so as to form an interference fit, and a slit is formed in at least one of the rib and a side wall of the groove along the length direction. The block connector according to claim 1, wherein the rib is configured to allow narrow width deformation in the rib and widening deformation in the groove. 5.