JP2000021511A - Connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance reliability for preventing a connector housing from being pulled out by a lancer. SOLUTION: A regulating part 55 to regulate displacing of a core wire Wa (wire) to a position where it interferes with a lance 41M is protrusively formed at the rear end surface of a connector housing 11M. Even if the core wire Wa is inclined to move toward a position where it abuts on the lance 41M, since it is blocked by the regulating part 55, the lance 41M is prevented from being dislocated from the connector housing 11M, and reliability for preventing the connector housing 11M from being pulled out by the lance 41M is enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication No. 9-22755 describes a connector in which a connector housing having an electric wire extending from a rear end face is inserted into a holder and prevented from being pulled out by a lance. In this connector, as shown in FIG. 14, a terminal fitting b connected to an electric wire a is inserted into a connector housing c from behind, and a shield cover e fixed to a shield layer d of the electric wire a is then attached to the connector housing c. It is connected to the externally mounted shield shell f while moving in the axial direction from the rear of the connector housing c, whereby the entire range from the electric wire a to the connector housing c is shielded. In this way, the assembled body of the connector housing c, the seal cover e, the shield shell f, and the terminal portion of the electric wire a is inserted from the rear into the cylindrical holder h in order to prevent the conductive portion from being exposed. You. The inserted assembly is retained and retained by engaging the lance g provided on the holder h with the rear end surface of the connector housing c.

[0003]

In such a connector,
As shown in FIG. 15, as the shield cover e is assembled to the connector housing c from the rear, the electric wire a extending to the rear of the connector housing c is folded. However, the space in which the electric wire a is folded is also a space for the lance g to engage with the connector housing c. For this reason, the electric wire a is elastically restored and hits the lance g, and is displaced toward the outer peripheral side (in a direction in which the electric wire a is detached from the connector housing c). The present invention has been made in view of the above circumstances, and has as its object to improve the reliability of retaining a connector housing by a lance.

[0004]

According to a first aspect of the present invention, there is provided a connector housing having an electric wire extending from a rear end face, and a holder for fitting the connector housing therein. A connector adapted to restrict the detachment of the connector housing by engaging with the rear end face of the connector housing, wherein the wire is displaced to a position where the electric wire interferes with the lance on the rear end face of the connector housing. The regulation section that regulates is formed suddenly.

According to a second aspect of the present invention, in the first aspect of the invention, the restricting portion is formed in a thin plate shape so as to partition between the position near the lance and the electric wire. .

[0006]

[Operation and effect of the invention] [Invention of claim 1] Even if the electric wire is displaced to a position where it comes into contact with the lance, the displacement is regulated by the regulating portion. Accordingly, the lance is prevented from being disengaged from the connector housing due to the interference of the electric wire, and the reliability of preventing the connector housing from being detached by the lance is improved.

According to the second aspect of the present invention, since the restricting portion is formed in a thin plate shape so as to partition from the position near the lance to the electric wire, the restricting portion is arranged at a position far from the lance and has a thick wall. As compared with the case described above, it is possible to ensure the maximum space for housing the electric wire behind the connector housing.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [Embodiment 1] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The connector according to the present embodiment includes a male connector 10M and a female connector 10F that can be fitted to each other.
0M and 10F are connector housings 11M and 1 capable of accommodating the terminal 45 connected to the terminal of the shielded electric wire W.
1F, shield shells 20M and 20F fitted around the outer periphery of the connector housings 11M and 11F, a shield cover 30 capable of shielding between the shielded electric wire W and the connector housings 11M and 11F, and these components can be accommodated. And the holders 40M and 40F.

The shielded electric wire W is composed of a plurality of core wires Wa each of which is separately coated with a resin (an electric wire which is a constituent element of the present invention), and a thin conductive metal wire surrounding the core wires Wa. It is composed of a shield layer Wb woven in a net shape and a sheath Wc provided so as to surround the shield layer Wb. This shielded electric wire W is stripped of the sheath Wc to expose the shield layer Wb for connection with the terminals 45M and 45F, and the shield layer Wb is folded back to form the core wire Wa.
Is prepared in a state in which is exposed.

First, the male connector 10M will be described. A male terminal 45M is connected to the end of each core wire Wa of the shielded electric wire W by crimping.
Since the male terminals 45M are inserted one by one from the rear into the connector housing 11M,
It is necessary to position the subsequent male terminal 45M behind the connector housing 11M in the insertion direction.
Therefore, the extension length of the core wire Wa from the terminal of the shield layer Wb is assured as a length obtained by combining the length of the male terminal 45M with a margin.

The connector housing 11M is made of a synthetic resin material, and has a columnar shape as a whole as shown in FIG. A plurality of cavities 12M are formed in the connector housing 11M at both front and rear end surfaces thereof. Each of the cavities 12M accommodates a male terminal 45M inserted from a rear opening.
A tab 46M at the tip of M projects forward from the front opening to the front of the connector housing 11M.

On the outer periphery of the connector housing 11M, there are formed two ribs 13M, which are elongated from the rear end toward the front by a certain length and are spaced at an angular interval of about 90 ° in the circumferential direction. These ribs 13M are for positioning a shield shell 20M described later with respect to the connector housing 11M. Connector housing 1
On the outer periphery of 1M, a flange 15M whose diameter is enlarged along the rear edge is formed over the entire periphery. This flange 1
A part of 5M crosses the rib 13M. The diameter of the flange 15M is set to the same size as the outer diameter of a shield shell 20M described later. At two predetermined positions on the outer peripheral surface of the flange 15M, an engaging projection 14M having an enlarged diameter portion at the tip is substantially 18
It is formed at an angular interval of 0 °. These engagement projections 14M are provided in the engagement grooves 3 of the shield cover 30 described later.
3, the shield cover 30 is connected to the connector housing 11M.

The shield cover 30, which will be described later, includes one rib 13M and the other rib 13M including both engagement protrusions 14M.
It fits within a region of approximately 270 ° over M. And
Flange 1 in fitting area of shield cover 30
A 5M rear end edge has a tapered guiding slope 18M inclined with respect to the fitting direction (axial direction) of the shield cover 30.
Are formed. The guide slope 18M functions to smoothly fit the shield cover 30.

In a region other than the fitting region of the shield cover 30 except for the two engaging protrusions 14M and at a substantially 90 ° region, the rear end edge of the flange 15M becomes an engaging portion 19M with a lance 41M described later. I have. The rear end face of the flange 15M constituting the engaging portion 19M is a shield cover 30.
The rear end surface and the outer peripheral surface of the engaging portion 19M are joined in an angular state. The front end face of the connector housing 11M is cut out from the peripheral edge to the outer periphery to form two positioning recesses 16M.
Are formed at an angular interval of 180 °. The positioning recess 16M is for positioning the connector housing 11M in the circumferential direction with respect to a holder 40M described later.

The shield shell 20M is made of a conductive metal material, and has a cylindrical shape as a whole as shown in FIG. The length of the shield shell 20M in the front-rear direction is set shorter than the connector housing 11M by the dimension of the flange 15M, and the inner diameter of the shield shell 20M is set to be the same as the outer dimensions of the connector housing 11M. The shield shell 20M is fitted into the connector housing 11M by being fitted from the front.

A guide groove 21M is formed in the shield shell 20M by notching forward from two positions at the rear edge matching the rib 13M, and the guide groove 21M is formed in the guide groove 21M.
Is fitted to the rib 13M while being fitted to the connector housing 11M. When the shield shell 20M and the connector housing 11M are in a regular fitting state in which the front and rear ends thereof match each other, the rear end of the guide groove 21M abuts on the front end of the rib 13M, and the rear end of the shield shell 20M faces the front end of the flange 15M. As a result, the rearward movement of the shield shell 20M from the normal position is restricted. In addition, a retaining portion 22M formed in the guide groove 21M so as to gradually narrow its width toward the front bites into the side surface of the rib 13M, so that the shield shell 2 is formed.
The forward movement of 0M is restricted.

At the front edge of the shield shell 20M, there are formed contact projections 24M which protrude forward from four positions at an angular interval of 90 °. These contact projections 24M are for making electrical contact with a shield shell 20M of the female connector 10F described later.
As shown in FIG. 5, the shield cover 30 is formed by bending a conductive metal plate, and includes a semi-cylindrical main body portion 31 and a crimping portion 32 provided continuously behind the main body portion 31. ing. The inner circumference of the main body 31 is the shield shell 2.
It has a diameter dimension that can be closely attached to the outer periphery of 0M. This body 3
1 is externally fitted to the connector housing 11M and the shield shell 20M within a range of a 270 ° fitting region including both engaging projections 14M between the two ribs 13M. The length of the main body 31 in the front-rear direction is set such that the male terminal 45M completely projects forward of the main body 31 when the shield cover 30 is crimped to the shielded electric wire W and the core wire Wa is straightened. ing.

The main body 31 is formed with an engagement groove 33 extending rearward from two positions at the front edge thereof which are aligned with the engagement protrusions 14M of the connector housing 11M. The engagement groove 33 includes an introduction portion 33a extending straight rearward from the rear end edge of the main body portion 31, a turning portion 33b extending in the circumferential direction by changing the direction from the rear end of the introduction portion 33a, and From the back end of the part 33b to the introduction part 33a
A holding portion 33 that is bent slightly at an acute angle diagonally forward to the side.
c. When the shield cover 30 is externally fitted to the shield shell 20M, the engagement protrusions 14M and the holding portions 33c are fitted, so that the shield cover 30
From the shield shell 20M is restricted.

The crimping portion 32 comprises a bent portion 32a projecting inward from the rear end of the main body portion 31, and a barrel portion 32b extending rearward from the tip of the bent portion 32a. The shield portion Wb of the shielded electric wire W is pressure-bonded to the barrel portion 32b so as to be wrapped therein, so that the shield layer Wb and the shield cover 30 are electrically connected to each other. In the crimped state, the shielded electric wire W is arranged almost concentrically with respect to the shield cover 30. The shield cover 30 is a male connector 10M.
It is a common part used not only for the female connector 10F but also for the female connector 10F.

The holder 40M has a cylindrical shape as a whole,
As shown in FIG. 1, inside the connector housing 11M, the shield shell 20M, the shield cover 30
The shield wire W and the terminal portion of the shielded wire W are inserted and accommodated from behind. Holder 40
On the inner periphery of the front end of M, a positioning projection (not shown) is formed which fits into the positioning recess 16M when the connector housing 11M is inserted into a regular position. By fitting the positioning projections and the positioning recesses 16M, the connector housing 11M is positioned with respect to the holder 40 in such a manner that movement in the circumferential and forward directions is restricted.

On the inner periphery of the holder 40M, a lance 41 extending cantilevered rearward and having an inward claw at its tip is provided.
M is formed. During insertion of the connector housing 11M, the lance 41M elastically bends outward by engaging a claw with the outer periphery of the shield shell 20M, and when the connector housing 11M reaches the regular insertion position, the lance 41M is elastically returned to its original position. The pawl is engaged with the flange 15M at the rear end of the connector housing 11M, thereby restricting the connector housing 11M from coming off rearward. At this time, the position where the claw of the lance 41M engages is the flange 15
Instead of the guiding slope 18M of M, it becomes the engaging portion 19M.

Further, a regulating portion 55 for preventing the core wire Wa from interfering with the lance 41M is formed on the rear end surface of the connector housing 11M. Regulatory department 5
Reference numeral 5 denotes a thin plate along an arc concentric with the circular shape of the rear end face of the connector housing 11M. This regulating part 55
Is formed in an eaves-like shape on the rear end surface of the connector housing 11M over a position where the lance 41M is engaged in the circumferential direction and a region covering both sides of the engaged position, and in the radial direction, the lance It is arranged at a position as close as possible (a position on the outer peripheral side as much as possible) within a range that does not interfere with 41M. The inner peripheral side of the regulating portion 55 is the core wire Wa.
It is a space for accommodating.

The holder 40M is formed with a fitting cylindrical portion 42M protruding forward, and a female-side holder 40F is fitted into the fitting cylindrical portion 42M.
Further, the female side holder 40F is attached to the fitting cylindrical portion 42M.
By engaging with the lock arm 43F of the
A lock hole 43M capable of holding 0M and 40F in a fitted state is formed. Next, the female connector 10F will be described. A part of the female connector 10F is the male connector 1
Since the configuration is the same as that of 0M, for the same components, the numerals in the reference numerals attached to the male connector 10M are shared, and the letter “M” is replaced by “F”.
And the description is omitted. Since the shield cover 30 is common to the male connector 10M, the same reference numerals are given and the description is omitted. Hereinafter, a configuration different from the male connector 10M will be described. As shown in FIG. 8, four relief recesses 17F are formed on the outer periphery of the front end of the connector housing 11F so as to be aligned with the male contact projections 24M. Then, as shown in FIG. 9, the front end of the shield shell 20F has a contact recess 24F instead of the one corresponding to the male contact protrusion 24M.
Are formed. The contact concave portion 24F is fitted into the relief concave portion 17F of the connector housing 11F, and can be fitted in an electrically conductive state with the male contact protrusion 24M. As shown in FIG.
Is not provided with a part corresponding to the fitting cylinder part 42M of the male-side holder 40M, and the front end is fitted into the fitting cylinder part 42M, and the projection 44F of the lock arm 43F is engaged with the lock hole 43M. By fitting, the fitting state is maintained.

Next, a structure for assembling the connector according to the present embodiment will be described. First, the assembly of the male connector 10M will be described. As shown in FIG.
Of the male terminal 45M to each core wire Wa, crimping of the shield cover 30 to the shield layer Wb, insertion of each male terminal 45M to the connector housing 11M, fitting of the shield shell 20M to the connector housing 11M. I do. The order of these steps can be arbitrarily set except that the male terminal 45M is crimped to the core wire Wa and then inserted into the connector housing 11M.

In the state in which the core wire Wa is straightened by assembling as described above, the male terminal 45M is located at a position protruding forward from the front end of the shield cover 30, and the front end of the shield cover 30 and the connector housing 1 are connected.
An interval is left between the rear end of 1M. In this state, the shield cover 30 is moved closer to the connector housing 11M in the axial direction, and the main body 31 of the shield cover 30 is externally fitted to the flange 15M and the shield shell 20M, and the engagement protrusions 14M are formed in the engagement grooves 33. Is inserted.

At this time, since the main body 31 is fitted into the area where the guide slope 18M of the flange 15M is formed, even if the leading edge of the main body 31 is shielded by the shield shell 20M.
The main body 31 is guided to the outer peripheral surface of the flange 15M and the outer peripheral surface of the shield shell 20M by the inclination of the guide slope 18M even if the main body 31 is displaced in the radial direction. After the shield cover 30 is moved forward with respect to the connector housing 11M until the engagement protrusion 14M hits the inner end of the introduction portion 33a of the engagement groove 33, the engagement protrusion 14M
3 until it hits the end of the turning part 33b.
0, and finally pull backward while rotating the shield cover 30 in the return direction. Thereby, the engagement protrusion 1
4M is engaged with the holding portion 33c at the innermost end of the engagement groove 33. In this state, even if the shield cover 30 is pulled backward, it does not come off from the connector housing 11M (see FIG. 7). .

In the above assembling step, the core wire Wa is bent as the shield cover 30 approaches the connector housing 11M, and the shield cover 30 is moved backward with respect to the connector housing 11M by the restoring force of the core wire Wa. It will receive a force in the direction of separation. Due to the force in the separating direction, the engaging projection 14M causes the engaging groove 3
3, the connector housing 11M and the shield shell 20
M, the shield cover 30 and the terminal of the shielded electric wire W are integrally assembled.

In this assembled state, the shield cover 30 comes into contact with the shield shell 20M so as to be electrically conductive, and the terminal of the shield layer Wb connects to the connector housing 11M.
The region reaching the front end of M is shielded by the shield cover 30 and the shield shell 20M. The tab 46M at the tip of the male terminal 45M protrudes forward of the connector housing 11M, but this tab 46M is shielded by the female-side shield shell 20F by fitting into a female terminal 45F described later. .

As for the length in the front-rear direction from the terminal of the shield layer Wb to the rear end of the connector housing 11M, as described above, the extension of the core wire Wa is at least as long as the length of the male terminal 45M. Since the size is required, the length of the shield cover 30 is considerably long.
Before assembling to the connector housing 11M, as shown in FIG. 6, the extension of the long core wire Wa is substantially the same as the shield layer Wb and the connector housing 11M.
The dimension L is between L and M. On the other hand, in the assembled state shown in FIG. 7, since the core wire Wa is bent, the dimension S is shorter than the extension length of the core wire Wa.

The connector housing 11M integrally assembled with the components as described above is inserted into the holder 40M from the rear and positioned at a predetermined position and posture. In the inserted state, the claw at the tip of the lance 41M is
The rearward engagement of the connector housing 11M is restricted by engaging the engagement portion 19M of the M from the rear. In the engagement portion 19M with the lance 41M, the rear end face is orthogonal to the direction in which the connector housing 11M comes off and is connected to the outer peripheral surface of the flange 15M in an angular manner. Engaging part 1
It is hard to come off from 9M. At the rear of the connector housing 11M, the bent core wire Wa is about to return to the extended state due to its elastic restoring force. When it hits the inner periphery of the portion 55, further approach to the lance 41M is restricted. Therefore, lance 4
1M is not displaced to the outer peripheral side by the pressing of the core wire Wa and dissociated from the rear end face of the connector housing 11M.

After the insertion of the connector housing 11M, the waterproof rubber plug 50 and the retaining ring 51, which have been sheathed in advance on the shielded electric wire W, are fitted to the rear end of the holder 40M. Thus, the assembly of the male connector 10M is completed. On the other hand, the female connector 10F is also assembled. The mounting of the female connector 10F is performed in the same manner as the mounting of the male connector 10M, and therefore is illustrated in FIGS. 10 and 11, and the description is omitted.
Further, for the same reason as the male connector 10M, the dimension S between the shield layer Wb and the connector housing 11F in the assembled state is shorter than the dimension L before the assembly.

The assembled male connector 10M and female connector 10F are fitted together (see FIG. 1). In this state, the male terminal 45M and the female terminal 45F
Are fitted to each other so as to be electrically conductive, and the contact projection 24M of the male shield shell 20M and the contact concave portion 24F of the female shield shell 20M are fitted and brought into contact with each other. The shield shells 20M and 20F are electrically connected to each other. As a result, the entire region from the male shield layer Wb to the female shield layer Wb is shielded by the shield cover 30 and the shield shells 20M and 20F.

As described above, in the connector of the present embodiment, the restricting portion 55 is formed on the rear end surfaces of the connector housings 11M and 11F, and the core wire Wa whose elasticity is to be restored is displaced to a position where it comes into contact with the lances 41M and 41F. Therefore, disassociation from the rear end surface of the connector housing 11M due to the interference of the core wire Wa is prevented. That is, the reliability of the function of preventing the connector housings 11M and 11F from coming off by the lances 41M and 41F is high.
Further, since the restricting portion 55 is configured to protrude in a thin plate shape so as to partition between the lances 41M and 41F and the core wire Wa, the restricting portion 55 is positioned far from the lances 41M and 41F (the inner peripheral side). In the connector housing 11 as compared with the case where the connector housing 11
The accommodation space for the core wire Wa behind the M and 11F can be secured to the maximum. Therefore, the bending stress of the core wire Wa can be reduced.

In addition, resin flanges 15M and 15F integral with the connector housings 11M and 11F are formed in a region where the main body 31 of the shield cover 30 is externally fitted, and the guide slopes 18 are formed on the flanges 15M and 15F.
M, 18F are formed. Thereby, even if the position of the main body 31 is shifted in the radial direction with respect to the shield shells 20M, 20F at the time of fitting, the guiding slopes 18M, 18F
Of the main body 31 due to the inclination of the shield shell 20
M and 20F are guided without being caught on the outer peripheral surface. Therefore, the fitting operation of the shield cover 30 can be easily performed. Even if there is an inward burr at the leading edge of the main body 31, the main body 31 is guided to the outer peripheral surfaces of the shield shells 20M and 20F without being caught by the inclination of the guide slopes 18M and 18F. Will be done.

The resin lances 41M and 41F for restricting the connector housings 11M and 11F inserted into the holders 40M and 40F are engaged with the engagement portions of the resin flanges 15M and 15F. 19M, 1
9F. Therefore, there is no danger that the lances 41M and 41F will be sheared by the action of a strong pulling force unlike the case where the lances 41M and 41F are engaged with the edges of the metal shield shells 20M and 20F. Reliability has been increased.

Further, the rear end faces of the engaging portions 19M, 19F are orthogonal to the direction in which the connector housings 11M, 11F come out, and the rear end face, the outer peripheral face, and the connection portion are formed in an angular shape. As a result, even if a detaching force acts on the connector housings 11M and 11F, no force acts on the lances 41M and 41F in a direction away from the engaging portions 19M and 19F. Improving the performance. When removing the connector housings 11M and 11F from the holders 40M and 40F, a jig (not shown) is inserted from the rear of the holders 40M and 40F to bend the lances 40M and 41F from the engagement portions 19M and 19F. What should I do?

The connector of the present embodiment has a core wire Wa.
Of the connector housing 1 and the shield layer Wb in the assembled state.
1M can be made shorter than the length of the core wire Wa extending from the shield layer Wb, and the length in the front-rear direction compared to a conventional connector that is assembled with the core wire Wa extended. Are becoming shorter and smaller. still,
In the present embodiment, since the main body 31 of the shield cover 30 has a semi-cylindrical shape, the shield from the upper side in FIG. 1 with respect to the core wire Wa is provided between the shield layer Wb and the shield shells 20M and 20F. The shield layer Wb and the shield shells 20M, 20F
Is narrowed by the bending of the core wire Wa, there is no possibility that the shielding effect is greatly reduced.

[Other Embodiments] The present invention is not limited to the embodiment described above and illustrated in 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) In the above-described embodiment, the regulating portion 55 has a thin plate curved eave shape. However, according to the present invention, the regulating portion 55 may have a flat plate shape, or may have a cylindrical shape that surrounds the core wire accommodating space all around. Good.

(2) In the above embodiment, the shield layer is constituted by a braid formed by knitting a conductive metal thin wire in a tubular net shape.
The present invention can also be applied to a structure in which a shield layer is formed by a method such as coating by vapor deposition, plating, or plasma spraying, or spirally winding a metal wire. (3) In the above embodiment, an example in which the present invention is applied to a shielded connector is described, but the present invention can be applied to a connector other than the shielded connector.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an assembled state of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a perspective view of a male connector housing.

FIG. 4 is a perspective view of a male shield shell.

FIG. 5 is a perspective view of a shield cover.

FIG. 6 is a partially cutaway side view showing a state in which the male connector is being assembled.

FIG. 7 is a partially cutaway side view showing a state in which the assembly of the male connector is partially completed.

FIG. 8 is a perspective view of a female connector housing.

FIG. 9 is a perspective view of a female shield shell.

FIG. 10 is a partially cutaway side view showing a state in which the female connector is being assembled.

FIG. 11 is a partially cutaway side view showing a state in which the female connector has been partially assembled.

FIG. 12 is a partially enlarged cross-sectional view showing a restricting portion on the male connector side.

FIG. 13 is a partially enlarged cross-sectional view showing an engaging portion on the male connector side.

FIG. 14 is a cross-sectional view showing a state in which a conventional connector is being assembled.

FIG. 15 is a sectional view showing a state in which the connector of the related art is being assembled.

[Explanation of symbols]

 11M: Connector housing 40M: Holder 41M: Lance 55: Regulator Wa: Core wire (electric wire) 11F: Connector housing 40F: Holder 41F: Lance

Claims (2)

[Claims] 1. A connector housing having an electric wire extending from a rear end face thereof, and a holder for internally fitting the connector housing, wherein a lance formed in the holder is engaged with the rear end face of the connector housing. A connector that restricts the connector housing from coming off, wherein a restricting portion that restricts displacement of the electric wire to a position where the electric wire contacts the lance is formed on a rear end surface of the connector housing. And connectors. 2. The connector according to claim 1, wherein the restricting portion projects from a position near the lance in a thin plate shape so as to partition between the lance and the electric wire.