JP3042346B2 - Bolt tightening connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bolt tightening connector.

[0002]

2. Description of the Related Art Conventionally, a panel mounting connector shown in FIG. 11 has been known as this kind of bolt tightening connector.
The panel mounting connector includes a cylindrical inner connector 2 mounted from the inside of the panel 1 and an outer connector 3 mounted from the outer surface of the panel 1 into the inner connector 2. A nut 2a is fixed to the inner wall of the inner connector 2 by insert molding.
The outer connector 3 rotatably holds a bolt 4 that penetrates and projects toward the nut 2a.

When the bolt 4 is screwed into the nut 2a of the inner connector 2 while inserting the outer connector 3 into the cylindrical inner connector 2, the outer connector 3 is drawn into the inner connector 2. Therefore, both fit. At this time, the tightening torque of the bolt 4 was controlled with a torque wrench so that both fit into an appropriate position.

[0004]

In the nut side housing of the conventional bolt tightening connector described above, the nut 2a is insert-molded and fixed, so that the shaft center of the bolt 4 in the outer connector 3 and the nut 2a are fixed. It is necessary to screw obliquely depending on the variation in the position of the shaft center, which causes an unnecessary torque to be applied, which may cause an error in fitting management by the tightening torque.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a bolt tightening connector capable of accurately performing fitting management by tightening torque.

[0006]

To achieve the above object, according to the first aspect of the present invention, a mating connector can be inserted.
A nut is provided at the back of the bottomed cylindrical housing.
Screw with a bolt protruding from the mating connector.
To the bolt-tightened connector mated with the mating connector.
The housing is formed on the bottom of the bottomed cylindrical body.
Into the hole with resin using a nut separately from the body.
Insert the nut housing molded into the nut
The nut housing is located between the housing and the side wall of the hole.
Clearance to allow slight movement is provided, and nut housing
The hole is an elastic piece that projects obliquely from the side wall of the hole.
Energized toward the center and held non-rotatably in the hole
However, it has features.

[0007] The invention according to claim 2 is the invention according to claim 1.
In the nut side housing of the bolt tightening connector,
The housing is made of a resin that is relatively hard
It has a characteristic when molded.

[0008]

[0009]

According to the bolt tightening connector of the first aspect, the nut
Nut housing with insert molding
Clearance with the hole formed in the bottom of the
It is possible to move the nut and bolt of the mating connector.
Even if misalignment occurs, due to slight movement of the nut housing
Unnecessary tightening torque because the axes of the nut and bolt are aligned
No problem occurs and both connectors can be easily mated
You. Moreover, the nut housing is located at the center of the hole with an elastic piece.
Nuts and bolts in the initial state.
The situation in which the center is misaligned by a large angle is also prevented .

[0010] Further, in the invention according to claim 2 configured as described above, the nut housing is more compa- nable than the main body.
On the other hand, since the insert molding is made of a hard resin, the nut to which a force is applied can be covered with the hard resin and held firmly.

[0011]

[0012]

As described above, according to the present invention, the nut can be finely moved so as to eliminate the deviation of the shaft center from the bolt, so that unnecessary torque is prevented from being applied and the fitting control by the tightening torque is performed. Can be performed accurately .

According to the second aspect of the invention, both the softness required for the main body and the hardness required for holding the nut can be satisfied.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing an inner connector of a panel mounting connector according to one embodiment of the present invention.
Indicates an assembled state. The inner connector 10 is formed in a bottomed cylindrical shape having a hood portion, and has a housing 20 formed with a plurality of terminal fitting accommodating chambers on its bottom surface for accommodating male terminal fittings, and crosses the terminal fitting accommodating chamber. The retainer 30a, 30b is inserted into retainer holding holes 20a, 20b formed in the bottom side wall of the housing 20 to fix the male terminal fitting, and the panel is engaged and held by the opening side wall of the housing 20. And a metal lock arm 40 which is detachably engaged with the lock arm 40.

As shown in FIGS. 3 and 4, the housing 20 has a bottomed cylindrical main body 21 that forms a hood portion with a cylindrical portion, and a rectangular hole having a rectangular cross section formed on the bottom surface of the main body 21. And a nut housing 22 having a rectangular cross section which can be inserted into the nut housing 21a. The main body 21 has a terminal fitting accommodating chamber 21b formed on the bottom wall, and has a resin lance 21b1 inside thereof. Since the lance 21b1 needs a certain degree of elasticity, the main body 21 is molded using a soft resin. On the other hand, the rectangular hole 2
The nut housing 22 that can be inserted into the
a is inserted inside and the outside is formed by insert molding with a hard resin. Since a large force is applied to the nut 22a at the time of tightening, a hard resin that can withstand this is used. As described above, the housing 20 is required to have partially soft and hard properties, and both requirements can be satisfied by molding the main body 21 and the nut housing 22 with different resins. The term “hard” or “soft” means hardness enough to withstand the force at the time of tightening and softness satisfying the bending performance as a lance.

In the middle of the rectangular hole 21a of the main body 21 in the depth direction, a partition wall 2 having a bolt insertion hole 21c1 formed at the center.
1c, and fixed locks 21d, 21d, whose tips project obliquely toward the partition wall 21c, are formed on the side wall of the rectangular hole 21a facing the opening side of the partition wall 21c.
21d is formed. There is a gap between the tip of each fixed lock 21d and the partition wall 21c.
Flanges 22b, 22b are formed at the ends of the second member 2 so that the flanges 22b, 22b can enter the gap. The flanges 22b, 22b protrude from opposite sides,
The length of both ends is longer than the distance between the tips of the fixed locks 21d, 21d.

In this embodiment, only one pair of fixed locks 21d, 21d are formed on the opposing side walls of the rectangular hole 21a. However, the fixed lock 21d is formed on the four wall surfaces, and the flange 22b is also formed on the four sides. It is good also as composition which performs. Further, since it is sufficient to engage and fix each other, an engagement hole may be formed in the side surface of the nut housing 22 so that the tip of the fixed lock 21d enters the engagement hole. Also, since the fixed lock 21d is an elastic piece, the nut housing 22 is always urged toward the center from both side surfaces. In the case where the elastic piece is used, the elastic piece may be a metal spring piece or a rubber cushion material.

The clearance between the distance between the front ends of the flanges 22b and 22b and the distance between the side walls of the rectangular hole 21a includes a tolerance including a tolerance.
Can move slightly around. In the present embodiment, the nut housing 22 can be finely moved by making the nut housing 22 detachable from the rectangular hole 21a by utilizing the clearance generated by itself. However, it is sufficient that the nut housing can be finely moved. After that, the structure may be such that it cannot be detached, or a gap may be formed beyond the clearance for detachment. Further, it may be arranged such that the axial center direction is displaceably held like a universal joint.

In such a configuration, the nut housing 22
Are inserted from the opening side of the hood-shaped main body 21 in the directions shown by the arrows in FIGS. 3 and 4. Flanges 22b, 22
b is inserted into the rectangular hole 21a in the bottom wall, the ends of the flanges 22b, 22b push the ends of the fixed locks 21d, 21d, and the nut housing 22 is separated from the partition wall 2 by the nuts 22.
1c, the flanges 22b, 22b pass through the tips of the fixed locks 21d, 21d. Then, the fixed locks 21d, 21d that have been bent protrude inward again, the flanges 22b, 22b are sandwiched between the partition wall 21c and the fixed locks 21d, 21d, and the nut housing 22 is fixed in the rectangular hole 21a. .

Since the nut housing 22 can be finely moved by clearance even in the rectangular hole 21a, an outer connector (not shown), which is a mating connector, is connected to the main body 21.
When the bolt is pressed against the nut 22a in the nut housing 22 and rotated, the nut housing 22 is moved slightly and the nut 22a and the bolt are aligned and screwed together. In such a state, unnecessary torque generated in a state where the shaft center is displaced is unnecessary, and the screw is smoothly screwed. Therefore, the tightening torque directly indicates the fitted state. Therefore, the fitting state can be accurately controlled only by controlling the tightening torque. Of course, the rectangular hole 21a and the nut housing 22 are rectangular in cross section and cannot rotate with each other.

FIGS. 7 and 8 show another embodiment of the present invention. The members corresponding to the above-described embodiments are denoted by the same reference numerals with the same lower two digits. In the present embodiment, no partition wall is formed in the rectangular hole 221a, which is a rectangular opening, and the nut housing 222, which has a rectangular cross section, can penetrate into and out of the main body 221 through the rectangular hole 221a. Further, a flange is not formed at the rear end of the nut housing 222, but a groove 222c is formed in the side wall surface near the rear end to go around three outer peripheral surfaces. A lock groove 221c is formed on the inner peripheral surface of the rectangular hole 221a corresponding to the groove 222c. Lock groove 22
1c has an opening 221d in the side wall surface of the main body 221, and is a space into which a plate-shaped lock plate 223 can be inserted from the opening 221d so as to cross the rectangular hole 221a.

The lock plate 223 is cut into a central portion at the tip to form a fork, and has a cutout 223a formed therebetween. The notch 223a is formed in the groove 222 of the nut housing 222.
The size is such that it can be engaged with the portion c, and a slight clearance is generated when both are engaged. The nut housing 222 is inserted into the rectangular hole 221a, and the groove 222c of the nut housing 222 is
21c, the lock plate 223 is attached to the opening 2
When inserted from 21d toward the rectangular hole 221a, the notch 223a at the tip of the lock plate 223 engages 222c in the nut housing 222. This state is shown in FIG.
Is shown in The lock plate 223 is inserted into the lock groove 221c and cannot move in the axial direction of the rectangular hole 221a.
3 and cannot move in the axial direction. As a result, the nut housing 222 is prevented from coming off, and since the rectangular hole 221a and the nut housing 222 are mutually rectangular, they cannot be rotated. In addition, there is a clearance for the purpose of inserting the nut housing 222 into the rectangular hole 221a, so that the nut housing 222 can be finely moved.

FIGS. 9 and 10 show another embodiment of the present invention. The members corresponding to the above-described embodiments are denoted by the same reference numerals with the same lower two digits. Also in this embodiment, no partition wall is formed in the rectangular hole 321a which is a rectangular opening, and the nut housing 322 also having a rectangular cross section can be inserted into the main body 321 through the rectangular hole 321a. I have. However, nut housing 3
Since a flange 322a is formed at the rear end of 22,
Large-diameter portion 321a formed at the opening of rectangular hole 321a
No. 1 can be inserted, but if the flange 322a hits the step 321e at the boundary with the small diameter portion 321a2, it cannot be inserted any further. Flexible arms 321f, 321f protrude inward from the inner peripheral wall surface of the small-diameter portion 321a2 in the rectangular hole 321a, and bias toward the center when the nut housing 322 is inserted.

An opening communicating with the retainer holding holes 320a, 320b is formed on the inner peripheral side surface of the large-diameter portion 321a1 of the rectangular hole 321a, and protrusions 330a1, which can be inserted into the openings, are formed at the tips of the retainers 330a, 330b. 330b
1 is formed. Therefore, the retainers 330a, 330
When b is inserted into the retainer holding holes 320a and 320b, the projections 330a1 and 330b1 protrude into the large diameter portion 321a1. The protrusions 330a1 and 330b1 are the flanges 32
2a and 322a, which protrude toward the opening side from the back surface, and the flanges 322a and 322a
a1, 330b1 to prevent it from falling off.

Also in this embodiment, the nut housing 3
The nut housing 322 is finely movable by a clearance generated between the nut 22 and the rectangular hole 321a.
The slight movement eliminates the deviation of the bolt (not shown) from the axis. Further, the arms 321f, 321f urge the nut housing 322 toward the center, and are held substantially at the center, so that they can be easily screwed with the bolt. As described above, the inner connector 10 has the bottomed cylindrical housing 20 having the hood portion, the rectangular hole 21a is formed in the inner wall, and the nut housing 22 insertable into the rectangular hole 21a is separately provided. Have. When the nut housing 22 is inserted into the rectangular hole 21a and is engaged and held by the fixed lock 21d, the nut housing 22 can be finely moved by the clearance, and the shaft center of the nut 22a provided inside by insert molding is replaced with a bolt. It can be finely moved to match the axis. Thereby, the fitting state can be managed by the tightening torque without unnecessary torque.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an inner connector according to one embodiment of the present invention.

FIG. 2 is a perspective view of the inside connector.

FIG. 3 is a cross-sectional view of the inner connector taken along the line III in FIG. 2;

FIG. 4 is a cross-sectional view of the inner connector taken along the line IV in FIG. 2;

FIG. 5 is a cross-sectional view when the nut housing in FIG. 3 is engaged.

6 is a cross-sectional view when the nut housing in FIG. 4 is engaged.

FIG. 7 is a schematic exploded perspective view of an inner connector according to another embodiment.

FIG. 8 is a schematic bottom view of the inside connector.

FIG. 9 is a schematic exploded perspective view of an inner connector according to another embodiment.

FIG. 10 is a schematic sectional view of a principal part of the inside connector.

FIG. 11 is a schematic exploded perspective view of a conventional panel mounting connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Inner connector 20 ... Housing 20a, 20b ... Retainer holding hole 21 ... Main body 21a ... Rectangular hole 21d ... Fixed lock 22 ... Nut housing 22a ... Nut 221 ... Body 221a ... Rectangular hole 221c ... Lock groove 221d ... Opening 222 ... Nut housing 222c ... groove 223 ... lock plate 223a ... notch 320a, 320b ... retainer holding hole 321 ... body 321a ... rectangular hole 321a1 ... large diameter part 321a2 ... small diameter part 321e ... step part 321f, 321f ... arm 322 ... nut housing 322a ... flange 330a, 330b ... retainer 330a1, 330b1 ... projection

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-215846 (JP, A) JP-A-6-275336 (JP, A) JP-A-8-64264 (JP, A) 62674 (JP, U) JP 1-143082 (JP, U) JP 61-149612 (JP, U) JP 6-72178 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) H01R 13/639

Claims (2)

(57) [Claims] 1. A bottomed cylindrical shape into which a mating connector can be inserted.
A nut is provided at the back of the housing.
By screwing with a bolt protruding from the hand side connector,
Bolt tightening connector to be mated with mating connector
The housing has a hole formed in the bottom surface of the bottomed cylindrical main body.
Then, using the nut separately from the main body,
Inserted nut housing is inserted , between the nut housing and the side wall of the hole,
Clearance is provided to allow slight movement of the nut housing
The nut housing projects obliquely from the side wall of the hole.
Urged toward the center of the hole by the elastic piece
A bolt held non-rotatably in the bore
Tightening connector. 2. The nut housing is smaller than the main body.
Characterized by a relatively hard resin
The bolt tightening connector according to claim 1.