KR20170004802A

KR20170004802A - Waterproof connector housing

Info

Publication number: KR20170004802A
Application number: KR1020150153846A
Authority: KR
Inventors: 요시지 키노시타
Original assignee: 메구로 셋케이 고우도우 카이샤; 어드밴스 일렉트로닉스 가부시키가이샤
Priority date: 2015-07-01
Filing date: 2015-11-03
Publication date: 2017-01-11
Also published as: JP2017016898A

Abstract

[PROBLEMS] To provide a waterproof connector housing that can be surely prevented from slipping into a terminal accommodating chamber without interposing an external member even on a small terminal metal fitting.
[MEANS FOR SOLVING PROBLEMS] In a waterproof connector housing having a housing main body made of synthetic resin and a retainer, the housing main body is formed in a cantilever shape from the rear end side to the front side on the bottom wall of the square- An upper lance having a lower lance having a lower locking projection engaged with a locking hole of the bottom plate and an upper locking projection formed on the upper wall in a cantilever shape from the front end side to the rear side and engaging with the upper plate of the terminal connection portion; A lower space for receiving the displacement and an upper space for receiving the elastic displacement of the upper lance, and the retainer has a lower wedge-shaped projection projecting into the lower space and the upper space to regulate the elastic displacement of the lower lance and the upper lance, And a wedge-shaped projection.

Description

Waterproof connector housing {WATERPROOF CONNECTOR HOUSING}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof connector housing having, for example, a terminal accommodating chamber for accommodating female terminal fittings or male terminal fittings, and more particularly to means for preventing the terminal fittings from coming off.

BACKGROUND ART Conventionally, an automotive connector used for connecting a wire harness or the like is a waterproof type connector housing, in which a terminal metal fitting, which is connected to a rear end side, is inserted into a terminal accommodating chamber formed in a housing main body, It is general that the terminal metal fitting is prevented and fixed by being pulled in by the retainer. In general, the male and female connector housings have a front end shape in which the housing main bodies into which the retainers are inserted fit each other. When the male and female connector housings are fitted, the front ends of the terminal accommodating chambers corresponding to each other come in contact with each other, The metal fitting and the male terminal fitting are connected.

The electric wire 10 is connected to the rear end side of the female terminal metal fitting 1a inserted into the terminal accommodating chamber 101 formed in the housing main body 100 as shown in the example of the female terminal connector housing of Fig. The terminal metal fitting is formed by pressing a metallic plate member, and has a terminal connecting portion in a square shape in the front region. In the female terminal fitting 1a, an elastic connecting piece 5 which is folded back from the front of the bottom plate 3a in a leaf spring shape is disposed inside the terminal connecting portion 2a. In the male terminal fitting, A male terminal tab is extended from the front end. The male terminal tab inserted from the front of the terminal connecting portion 2a of the female terminal metal fitting 1a elastically contacts between the elastic connecting piece 5a and the upper plate 6a so that the electrical connection between the male terminal fitting and the female terminal fitting .

The wire 10 is covered with a synthetic resin insulation cloth 12 around the core wire 11 and a terminal core wire 11 having the wire 10 as a wire connection part is peeled off from the rear side area of the terminal connection part 2a. A wire barrel 7a for crimping the wire barrel 7a and an insulation barrel 8a for the rear side of the wire barrel 7a.

In the waterproof connector, a rubber stopper (13) is fitted on the insulating cover (12) behind the terminal core wire (10) which is normally crimped by the wire barrel (7a) of the wire (10). The terminal accommodating chamber 101 is an angular cylinder type chamber 102 in which a front end portion of the terminal accommodating chamber 101 is inserted into which a female terminal fitting 1a is inserted and a rear cylindrical portion 103 ). When the female terminal fitting 1a is inserted into the terminal accommodating chamber 101, the rubber stopper 13 is fitted to the cylindrical space 103 in the rear region to thereby perform watertight sealing (see, for example, Patent Document 1).

The rubber stopper 13 has a small diameter attaching barrel 15 at its tip end area and a rubber stopper 13 is fixed to the caulking roll 15 by the insulation barrel 8a together with the wire 10. [ And is compressed. The rubber stopper 13 is a thick cylindrical member through which the electric wire 10 penetrates and has a lip portion 14 formed on the outer circumferential surface of which the outermost diameter is slightly larger than the inner diameter of the cylindrical housing chamber 103 of the terminal accommodating chamber 101 The sealing force for the cylindrical chamber 103 is obtained.

In addition, a cantilever-shaped lance 104 is formed on the bottom wall of the barrel-shaped body 102 as a base portion extending forward. A locking protrusion 105 having a slanting face rising in a tapered shape toward the front of the housing main body 100 and a vertical cross-section perpendicular to the free end of the lance 104 is formed. Below the lance 104 is formed a lower space 106 for receiving the elastic displacement of the lance 104 and the locking protrusion 105 is also elastically displaceable in the vertical direction.

A rectangular locking hole 4a is formed in the bottom plate 3a of the female terminal fitting 1a. When the female terminal fitting 1a is inserted into the terminal accommodating chamber 101, the bottom surface of the bottom plate 3a of the terminal connecting portion 2a becomes flat as the square terminal connecting portion 2a advances in the square- The locking projection 105 is pressed into the lower space 106 while bending the lance 104 by contacting the locking projection 105. [ When the insertion of the terminal connecting portion 2a further proceeds and the locking hole 4a reaches the locking protrusion 105, the locking protrusion 105 ascends in the locking hole 4a by the elastic restoration.

When the retainer 110 is fitted to the front end side of the housing main body 100 from the front after the insertion of the female terminal metal fitting 1a into the terminal accommodating chamber 101 is completed, the wedge-shaped protrusion 111 formed on the retainer 110, Is inserted into the lower space 106 of the lance 104 and the elastic displacement of the lance 104 is regulated. The state in which the front end surface of the locking protrusion 105 contacts the inner circumferential front end surface of the locking hole 4a is maintained and the return of the terminal connecting portion 2a to the rear side is restricted, The pull-out preventing state with respect to the main body 100 is obtained. In the waterproof connector housing for a vehicle, the terminal connection portion of the male terminal metal fitting is coupled by the lower lance in the locking hole formed in the lower surface thereof by the same structure, and by the engagement of the wedge- The pull-out preventing state can be obtained.

Japanese Patent Application Laid-Open No. 11-146206

As described above, in the conventional waterproof connector housing, the terminal fittings are prevented from slipping out by the engagement of the locking projections of the lance formed in the bottom wall of the terminal accommodating chamber and the locking holes formed in the bottom plate of the terminal connection portion. Further, due to the integration of the present connectors and the miniaturization of the terminal metal fittings, the metal plates constituting the terminal metal fittings are also thinner, the terminal connecting portions themselves are also small in width, and are easily deformed by external pressure. Therefore, the locking force for retaining the terminal metal fittings is also weak, so that any one of the terminal fittings can be moved rearward in the terminal accommodating chamber by the pushing resistance when the male terminal tabs of the male terminal fittings are inserted into the terminal connecting portions of the female terminal fittings So that there is a fear that the electrical connection becomes poor.

The connector housing may have a structure in which a separate locking member is inserted and interposed from the outside in the middle of the terminal accommodating chamber. However, in the waterproof connector, a region for inserting a rubber stopper or a sealing member in the housing has already been formed So that an additional solution is not practical in that an additional external member intervening region is added to enlarge the overall connector. Further, by forming the insertion hole on the wall surface of the connector side, the waterproof function may be impaired.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a waterproof connector housing capable of reliably preventing a small terminal metal fitting from slipping out in a terminal accommodating chamber without interposing an external member.

In order to attain the above object, a waterproof connector housing according to a first aspect of the present invention includes: a housing body made of synthetic resin having at least one terminal accommodating chamber in which a terminal metal fitting connected to a wire terminal is inserted forwardly from a rear end thereof, A waterproof connector housing having a retainer made of a synthetic resin that is fitted to the front end side of the terminal housing chamber of the housing main body from the front to prevent the terminal metal fittings from slipping out,

Wherein the terminal accommodating chamber is formed in a front region of the terminal accommodating chamber and has an angular terminal-shaped chamber in which an angular terminal connection portion of the terminal bracket provided with a contact piece for obtaining electrical connection with a terminal of the opponent terminal, And a cylindrical space for inserting a waterproof rubber stopper fitted around a wire extending from a rear end side of the female terminal metal fitting,

The hatchery chamber has a lower lance which is elastically displaceable in a vertical direction formed in a cantilever shape forward from a rear end side of the square barrel on a bottom wall, and a lower lance which is elastically displaceable in a vertical direction and which is formed in a cantilever shape rearward from the front end side of the square- And an upper lance capable of elastic displacement,

Wherein the lower lance has a lower locking projection formed in the vicinity of the free end thereof and engaged from below with a locking hole formed in the bottom plate of the terminal connection portion when the terminal connection portion of the female terminal fitting is inserted into the square-

Wherein the upper lance is formed at its free end and has an upper locking protrusion that is engaged with the upper plate of the terminal connecting portion at a position behind the lower locking protrusion when the terminal connecting portion of the female terminal fitting is inserted into the square-

The housing main body has a lower space below the lower lance for receiving elastic displacement of the lower lance and an upper space for receiving elastic displacement of the upper lance on the upper lance,

Wherein the retainer has a lower wedge-shaped projection portion which is respectively inserted into the lower space and the upper space when fitting the front end side of the terminal housing chamber of the housing body from the front to regulate the elastic displacement of the lower lance and the upper lance, And is provided with a protruding portion.

According to a second aspect of the present invention, in the waterproof connector housing for a female terminal according to the first aspect of the present invention, the hatch-shaped chamber is formed as a hollow chamber in a columnar convex portion fitted in the recess formed in the retainer,

The upper lance is configured to be partially displaced by the coaxial slit from the upper wall of the square barrel-shaped wall made up of the plate-shaped wall of the columnar convex portion to be elastically displaceable,

And the slit is sealed by engagement of the concave portion of the retainer with the columnar convex portion.

According to a third aspect of the invention, in the waterproof connector housing according to the first or second aspect, the upper lance and the upper locking protrusion are disposed at a position where a rear end surface thereof is projected in the opening face of the cylindrical loss chamber.

(Effects of the Invention)

In the waterproof connector housing for a female terminal according to the present invention, the lower locking projection of the lower lance formed on the bottom wall of the terminal accommodating chamber and the upper locking projection of the upper lance formed on the upper wall prevent slippage of the female terminal fitting at two places. Since the upper and lower lances are configured to be elastically displaceable in the vertical direction at the time of insertion of the female terminal fittings, even a small female terminal fitting formed of a thin and small-width metal can be inserted into the terminal accommodating chamber well without distortion, So that it is stably held in the terminal accommodating chamber.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a longitudinal sectional view showing a schematic partial structure of a waterproof connector housing for a female terminal according to an embodiment of the present invention, and is a side sectional view in a state in which a female terminal fitting is housed.
Fig. 2 is a partial cross-sectional perspective view of the waterproof connector housing for a female terminal of Fig. 1. Fig.
3 is a rear view showing the housing main body of the waterproof connector housing for the female terminal shown in Fig. 1 in a state in which the female terminal metal fitting is not received.
4 is a cross-sectional view of the housing body of FIG. 3 taken along line AA.
Fig. 5 is a side cross-sectional view in a state in which a male terminal fitting is housed, which shows a schematic partial structure of a waterproof connector housing for a male member, which is a counterpart of the female connector waterproof connector housing of Fig.
Fig. 6 is a partial cross-sectional perspective view of the waterproof connector housing for the implement of Fig. 5;
7 is a schematic partial cross-sectional view showing another locking bracket of the upper lance in the waterproof connector housing according to the present invention.
Fig. 8 is a vertical cross-sectional view showing an example of a conventional waterproof connector housing for female terminals. Fig. 8 (a) shows a state in which a retainer has not been inserted yet, and Fig. 8 (b) shows a state in which a retainer has been fully inserted.

A waterproof connector housing for a female terminal according to the present invention comprises a housing main body made of a synthetic resin having at least one terminal accommodating chamber and a synthetic resin member which is fitted to the front end side of the terminal housing chamber of the housing main body from the front to prevent the female terminal fittings from coming off A waterproof connector housing provided with a resin retainer is provided with an angular cylinder chamber in which an angular terminal connection portion of a terminal metal fitting provided with a contact piece for obtaining electrical connection with a terminal of a counterpart is formed in a front region of the terminal accommodating chamber, Wherein a cylindrical lid for inserting a waterproofing rubber stopper fitted around a wire extending from a rear end side of the terminal metal fitting is formed in a rear region of the square tubular body so as to extend from the rear end side of the square tubular body to the bottom wall, A lower lance which is elastically displaceable in a vertical direction and which is formed in a cantilever shape toward the upper wall, In the up-and-down direction is formed in a cantilever-like toward the rear from the front end side of the square tube-type lost is provided with a top lance is elastically displaced. Further, in the waterproof connector housing of the present invention, the insertion (advancing) direction of the terminal fitting is forward and the electric wire side is rearward.

The lower lance has a lower locking projection formed in the vicinity of its free end and engaged with a locking hole formed in the bottom plate of the terminal connection portion from the lower side when the terminal connection portion of the terminal fitting is inserted into the square- And the housing main body has an upper locking protrusion which is formed at the free end thereof and engages with the upper plate of the terminal connecting portion when the terminal connection portion of the terminal fitting is inserted into the square barrel, A lower space is formed in the lower lance and an upper space for receiving elastic displacement of the upper lance is formed on the upper lance. When the retainer is fitted to the front end side of the terminal accommodating chamber of the housing main body from the front, And the upper wedge-shaped protruding portion protrudes from the lower space Respectively, to regulate the elastic displacement of the lower lance and the upper lance.

Therefore, in the waterproof connector housing of the present invention, since the terminal connecting portion of the terminal metal fitting is prevented from being dislodged by the upper lance as well as the lower lance, the terminal metal fitting is small and the metal plate constituting the metal fitting is very thin, So that it can be stably maintained in the room. In addition, since the detachment preventing state of the lower lance and the upper lance is fixed by the engagement of the retainer, there is no risk that the terminal metal fitting is returned from the terminal accommodating chamber due to the pressing at the time of fitting with the other terminal metal fitting,

In the present invention, when the terminal accommodating chamber is inserted into the terminal accommodating chamber, each of the terminal connecting portions is brought into contact with the respective locking protrusions at the time of inserting the terminal accommodating chambers. Since the upper lance and the lower lance are both resiliently displaced into the outer space, the terminal connecting portion is smoothly inserted into the square barrel without any resistance, so that no pressing force is generated substantially to cause bending deformation in the terminal connecting portion.

The locking of the upper lance with the terminal connection portion may be configured such that a locking hole is formed in the upper plate of the terminal connection portion in the same manner as the lower lance so that the upper locking projection is engaged with the locking hole when the terminal connection portion is inserted into the square- And a coupling mechanism in which the protrusion locks to the rear edge of the upper plate of the terminal connection portion. In manufacturing, it is preferable that a locking hole is not required to be formed on the upper plate, as long as it is a mechanism that locks to the rear edge of the terminal connection portion upper plate, and it is possible to mount the same with the conventional small terminal fitting.

Since the square tubular seal is generally formed of a hollow chamber in a columnar convex portion which is conventionally engaged with a concave portion formed in the retainer, as a constitution for forming the upper lance, the square tubular wall of the columnar convex portion, Shaped slit to form a cantilever-like portion that can be elastically displaced. However, the slit is sealed by the engagement of the concave portion of the retainer and the columnar convex portion so that the waterproof function is not damaged by the slit.

It is preferable that the upper lance and the upper locking protrusion are disposed such that their rear end faces are projected in the opening face of the cylindrical body. That is, the arrangement is such that the upper lance and the upper locking protrusion are housed in the opening of the terminal accommodating chamber when viewed from the rear end side of the cylindrical housing in the state where the terminal metal fitting is not received. With this configuration, the upper lance is not increased in size as compared with the conventional connector even in a configuration including a plurality of terminal accommodating chambers without substantially affecting the gap between the upper lance and the adjacent terminal accommodating chamber.

(Example)

The waterproof connector housing as one embodiment of the present invention is shown in Figs. 1 to 6 as an example of a pair of waterproof connector housings for a female terminal for a plurality of small female terminal fittings and a female terminal fitting for a footwear. 1 is a longitudinal cross-sectional view of a portion where one terminal accommodating chamber accommodating a small female terminal fitting of a female terminal waterproof connector housing and one terminal accommodating chamber accommodating a large female terminal fitting above the terminal accommodating chamber, and FIG. 2 is a cross- And Fig. Fig. 3 is a schematic plan view of the housing main body of the waterproof connector housing for female terminals, and Fig. 4 is a cross-sectional view taken along line A-A of Fig. Figs. 1 and 2 show a state in which the female terminal fitting is inserted, and Figs. 3 and 4 show the female terminal fitting in a non-inserted state, respectively. Fig. 5 is a partially longitudinal side sectional view of the waterproof connector housing for a vehicle, which is a counterpart of the waterproof connector housing for a female terminal of Fig. 1, and Fig. 6 is a sectional perspective view of the terminal housing chamber. In the present embodiment, the small female terminal fittings held in the terminal accommodating chambers have the same configuration as that shown in Fig. 8, and the same reference numerals are given to common portions. In addition, the insertion (advancing) direction of the terminal metal fittings into the terminal accommodating chamber was forward and the electric wire side was rearward. That is, in Fig. 1, the left side is the front side and the right side is the rear side toward the ground, and in Fig. 5, the right side is the front side and the left side is the rear side.

The waterproof connector housing 20 for a female terminal according to the present embodiment includes a terminal accommodating chamber 22 in which a small female terminal metal fitting 1a is received and a terminal accommodating chamber 122 in which a large female terminal fitting is accommodated A synthetic resin housing body 21 and a synthetic resin retainer 35 fitted to the front end side of the terminal accommodating chamber from the front. In Fig. 1, the retainer 35 is shown by a solid line before fitting and the broken line is shown by a complete line. Fig. 2 shows the state in which the retainer 35 is completely engaged.

The terminal accommodating chamber 22 is formed in an inverted tubular shape in which the terminal connecting portion 2a of the female terminal fitting 1a has an angular cylindrical shape and into which the front region is inserted, Diameter cylindrical portion 24 into which a waterproof rubber stopper 13 inserted in the electric wire 10 extending from the rear end of the female terminal metal fitting 1a is inserted.

A lower lance 26 in the form of a cantilever extending forward with the rear side as the base portion is formed in the bottom wall 25 of the square barrel type chamber 23, And a lower locking protrusion 27 having a vertical cross-section is formed upright on the inclined surface rising upward in a tapered manner. The lower locking protrusion 27 is formed at the bottom of the terminal connecting portion 2a when the terminal connecting portion 2a of the female terminal fitting 1a is inserted into the square barrel 23 in the vicinity of the inside of the square- And is disposed at a position overlapping the locking hole 4a formed in the plate 3a. A lower space 28 is formed below the lower lance 26 to receive the elastic displacement of the lower lance 26 accompanying the lower locking projection 27 in the up and down direction.

A cantilever-shaped upper lance 30 extending rearward with the front side as a base portion is formed in the upper wall 29 of the barrel-shaped body chamber 23. A housing main body 21 An upper locking protrusion 31 having an inclined surface rising in a tapered shape toward the front from the rear side is formed. The upper locking protrusion 31 is formed on the top surface of the terminal connecting portion 2a when the terminal connecting portion 2a of the female terminal fitting 1a is inserted into the square box- And is disposed at a position corresponding to the rear edge of the rear surface 6a. An upper space 32 is formed at an upper portion of the upper lance 30 to receive the elastic displacement of the upper lance 30 with the upper locking lug 31 in the vertical direction.

The retainer 35 is provided with a lower wedge-shaped protrusion 37 which is inserted into the lower space 28 when fitting with the housing main body 21 and an upper wedge-shaped protrusion 38 which is inserted into the upper space 32, A male terminal insertion port 39 communicating with the front end of the male terminal 2a is formed.

When the female terminal fittings 1a are inserted into the terminal accommodating chambers 22 in the housing main body 21 having the above-described configuration, the square tubular terminal connection portions 2a at the tip end side are connected to the large- The upper surface of the upper plate 6a of the terminal connecting portion 2a first comes into contact with the upper upper locking projection 31 immediately before the upper end of the upper terminal plate 6a. However, since the upper lance 30 is elastically displaceable in the vertical direction, the terminal connecting portion 2a can be advanced forward while pushing the upper locking protrusion 31 into the upper space 32. [

Subsequently, the lower surface of the bottom plate 3a of the terminal connecting portion 2a contacts the lower locking projection 27 in the vicinity of the inner side, but the lower lance 26 is elastically displaceable in the vertical direction, The locking protrusion 27 can be advanced forward while pushing down the lower space 28. At this time, the terminal connecting portion 2a simultaneously comes in contact with the upper locking projection 31 and the lower locking projection 27 from above and below, but both are elastically displaced upward and downward. The pressing force acting on the terminal connecting portion 2a is transmitted to the terminal connecting portion 2a can not be deformed.

When the front end of the terminal connecting portion 2a reaches the front end of the terminal accommodating chamber 22 and the insertion of the terminal connecting portion 2a into the square box 23 is completed, the lower locking protrusion 27 is resiliently upward And is lifted from the lower side in the locking hole 4a of the bottom plate 3a of the terminal connecting portion 2a to be coupled to the locking hole 4a and the upper locking protrusion 31 is also elastically restored downward, Is engaged with the rear end edge of the upper plate 6a of the connecting portion 2a so that the female terminal fitting 1a can be prevented from slipping out by the upper and lower portions.

When the retainer 35 is then fitted into the housing main body 21 from the front side, the lower wedge-shaped projection 37 is inserted into the lower space 28 to restrict the elastic displacement of the lower lance 26 and the upper wedge- 38 are inserted into the upper space 32 and the elastic displacement of the upper lance 30 is regulated. As a result, the engaged state of the lower locking protrusion 27 and the upper locking protrusion 31 with respect to the terminal connecting portion 2a is fixed and the locking state of the female terminal fitting 1a in the terminal accommodating chamber 22 is fixed . By the above-described upward / downward direction stopping, the retention of the small female terminal metal fitting 1a in the terminal accommodating chamber 22 becomes more reliable and stable.

In the present embodiment, the square barrel 23 is formed as a hollow chamber in a columnar convex portion 34 which is fitted in the concave portion 36 formed in the retainer 35. [ The upper lance 30 has an elastically displaceable cantilever shape in which the upper lance 30 has been partially cut off by the coaxial slit 33 shown in Fig. 4 from the upper wall 29 of the square barrel formed by the plate-shaped wall of the columnar convex portion 34 As shown in Fig. Therefore, in this configuration, the upper space 32, in which the upper lance 30 can be elastically displaced, is disposed on the upper side of the columnar convex portion 34, and the lower space 26 in which the lower lance 26 is elastically displaceable An upper wedge-shaped projection 38 is formed above the edge portion of the recess 36 of the retainer 35 and a lower wedge projection 37 is formed downward.

Even if the slit 33 is formed on the side of the terminal accommodating chamber 22 in this embodiment, the recess 36 of the retainer 35 is engaged with the columnar protrusion 34, Is sealed so that the waterproof function required of the waterproof connector housing 20 for the female terminal is not impaired. 5, the upper lance 30 and the upper locking projection 31 are housed in the inner space of the terminal accommodating chamber 22 when viewed from the side of the cylindrical housing chamber 24, Respectively. Therefore, even when the upper lance 30 has a plurality of terminal accommodating chambers without substantially affecting the gap between the upper lance 30 and the adjacent terminal accommodating chambers, the upper lance 30 does not become larger than the conventional connector.

5, the retainer 55 and the housing main body 21 are connected to each other by a female terminal (not shown) having an external shape different from that of the retainer 55 and the housing main body 21, The configuration of the terminal accommodating chamber 42 formed in the housing main body 41 is substantially the same as the configuration of the terminal accommodating chamber 22 for the female terminal .

That is, the terminal accommodating chamber 42 has an inverted-U-shaped lower chamber 43 in which the terminal connecting portion 2b of the male terminal metal fitting 1b is fitted in the front region, And the communicating rear region is a large-diameter cylindrical chamber 44 into which a waterproof rubber stopper 13, which is embroidered on the electric wire 10 extending from the rear end of the male terminal metal fitting 1b, is inserted.

A cantilever-shaped lower lance 46 extending forward with the rear side as a base portion is formed in the bottom wall 45 of the square barrel type chamber 43 and a front end of the housing main body 41 is connected to a free end assembly of the lower lance 46 A lower locking protrusion 47 having a vertical cross section is formed upright on an inclined surface that rises in a tapered manner. The lower locking protrusion 47 is formed at the bottom of the terminal connecting portion 2b when the terminal connecting portion 2b of the male terminal fitting 1b is inserted into the square barrel 43 in the vicinity of the inside of the square- And is disposed at a position overlapping the locking hole 4b formed in the plate 3b. A lower space 48 is formed below the lower lance 46 to receive a vertical elastic displacement of the lower lance 46 accompanied by the lower locking projection 47.

A cantilever-like upper lance 50 extending rearward is formed at the front side of the upper wall 49 of the square barrel type chamber 43. A housing main body 41 is fixed to the free end of the upper lance 50, An upper locking protrusion 51 having an inclined surface rising in a tapered shape from the rear to the front is formed upright. The upper locking protrusion 51 is formed on the upper surface of the terminal connecting portion 2b when the terminal connecting portion 2b of the male terminal fitting 1b is inserted into the square box- Is disposed at a position corresponding to the rear end edge of the rear end portion 6b. An upper space 52 is formed above the upper lance 50 to receive an elastic displacement in the vertical direction of the upper lance 50 accompanying the upper locking protrusion 51. [

The retainer 55 is provided with a lower wedge-shaped protrusion 57 which is inserted into the lower space 48 when fitting with the housing main body 41, an upper wedge-shaped protrusion 58 which is inserted into the upper space 52, (Male terminal tab) 5b serving as a contact piece on the male terminal side extending in the horizontal direction from the front end 2b of the male terminal through-hole 59 is formed.

Therefore, when the male terminal fittings 1b are inserted into the terminal accommodating chambers 42 in the housing main body 41, the terminal connecting portions 2b of the square tubular form are inserted into the cylindrical cavity 43 through the large- The upper surface of the upper plate 6b of the terminal connecting portion 2b is brought into contact with the upper upper locking projection 51 and the upper lance 50 is elastically displaced to move the upper locking projection 51 in the upper space 52 And the lower surface of the bottom plate 3b of the terminal connecting portion 2b is brought into contact with the lower side locking projection 47 in the vicinity of the inner side so that the lower side lance 46 is elastically displaced and the lower side locking projection 47 ) Into the lower space 48 and proceeds forward. When the insertion of the terminal connecting portion 2b into the barrel-shaped lower chamber 43 is completed, the lower locking protrusion 47 is elastically restored upward so as to be elastically restored to the inside of the locking hole 4b of the bottom plate 3b of the terminal connecting portion 2b And the upper locking protrusion 51 is also elastically restored downward to be engaged with the rear end edge of the upper plate 6b of the terminal connecting portion 2b, The detachment of the male terminal fittings 1b is prevented.

When the retainer 55 is then fitted into the housing main body 41 from the front, the lower wedge-shaped protrusion 57 is inserted into the lower space 48 to restrict the elastic displacement of the lower lance 46, and the upper wedge- 58 are inserted into the upper space 52 and the elastic displacement of the upper lance 50 is regulated. As a result, the engaged state of the lower locking protrusion 47 and the upper locking protrusion 51 with respect to the terminal connecting portion 2b is fixed and the disengagement of the male terminal fitting 1b in the terminal accommodating chamber 42 is fixed . Such small-sized male terminal fittings 1b in the terminal accommodating chamber 42 can be held more securely and stably by preventing the two upper and lower portions from slipping off.

In the waterproof connector housing 40 for the vehicle occupant, the square barrel type cavity 43 is formed as a hollow chamber in the columnar convex portion 54 that is fitted in the recess 56 formed in the retainer 55, and the upper lance 50 are formed as cantilever-like portions that can be elastically displaced, which are partially cut off from the upper wall 49 of the square cylinder-like shape of the plate-shaped wall of the columnar convex portion 54 by the chevron-shaped slit 53. The slit 53 is sealed by the engagement of the concave portion 56 of the retainer 55 and the columnar convex portion 54 and the waterproof function required for the waterproof connector housing 40 is maintained.

Therefore, when the waterproof connector housing 20 for the female terminal and the waterproof connector housing 40 for the male member having the above configuration are inserted into each other, the number of the male terminal brackets 1b extending forward from the front end of the terminal housing chamber 42 The terminal tab 5b is inserted into the terminal accommodating chamber 42 from the male terminal insertion port 39 and press-fitted between the elastic connecting piece 5a in the terminal connecting portion 2a and the upper plate 6a. At this time, the female terminal metal fitting 1a and the male terminal fitting 1b are pressurized to the rear of the terminal accommodating chambers mutually, but are stably retained in the respective terminal accommodating chambers by preventing them from falling off at the two positions as described above Therefore, reliable electrical connection is established without being pushed backward.

In the above embodiment, the upper locking protrusion is engaged with the rear end edge of the upper surface as the locking fitting with the terminal connection portion of the upper lance. However, the present invention is not limited to this, and other locking fittings It is also possible. For example, an upper locking hole 9 is formed in the upper plate 6a of the terminal connecting portion 2a as shown by the waterproof connector housing 60 for the female terminal shown in Fig. 7, and the upper locking hole 9 is formed on the upper side of the upper lance 70 And the locking protrusion 71 is engaged.

The cantilever-like upper lance 70 is formed on the upper wall 69 of the barrel-shaped resilient chamber 63 of the terminal accommodating chamber 62 from the front to the rear in the same manner as in the above embodiment, The upper locking lug 71 formed on the free end of the upper lance 70 is fixed to the upper end of the upper lance 70 by the terminal fitting 70. [ When the terminal connecting portion 2a of the terminal block 1a is inserted into the barrel-shaped lower chamber 63, the terminal connecting portion 2a is formed in a position overlapping the upper locking hole 9.

As a result, when the terminal connecting portion 2a is inserted into the barrel-shaped lower chamber 63, the bottom surface 3a of the terminal connecting portion 2a is brought into contact with the lower locking projection 67 of the lower lance 66 into the lower space 68 The upper surface 6a is pushed up and the upper locking projection 71 of the upper lance 70 is pushed upward into the upper space 72 and the terminal connecting portion 2a is completely drawn into the square- These upper and lower lances 70 and 66 are resiliently restored and the respective locking protrusions 67 and 71 are raised and engaged in the corresponding locking holes 4a and 9, respectively. The lower wedge-shaped projection 77 and the upper wedge-shaped projection 78 are inserted into the lower space 68 and the upper space 72 by the engagement of the retainer 75 and the elastic displacement of the upper and lower lances is regulated The terminal connection portion 2a is reliably prevented from slipping out in the two locking holes of the bottom plate 3a and the top plate 6a.

1a: female terminal bracket 1b: male terminal bracket
2a, 2b: terminal connecting portions 3a, 3b:
4a, 4b: locking hole 5a: elastic connecting piece
5b: male terminal tabs 6a, 6b: upper plate
7a, 7b: wire barrel 8a, 8b: insulation barrel
9: upper locking hole 10: wire
11: Core wire 12: Insulation cloth
13: rubber stopper 14: lip
15: Attachment barrel
20: Waterproof connector housing for female terminal
40: waterproof connector housing for the user 21, 41, 61: housing body
22, 62: Terminal holding room (for small arm terminal fittings)
42: Terminal storage room (for small water terminal)
23, 43, 63: square mold loss 24, 44, 64: cylindrical loss
25, 45, 65: bottom wall 26, 46, 66: lower lance
27, 47, 67: lower side locking protrusion 28, 48, 68:
29, 49, 69: upper wall 30, 50, 70: upper lance
31, 51, 71: upper locking protrusion 32, 52, 72:
33, 53, 73: a U-shaped slit 34, 54, 74: a columnar convex portion
35, 55, 75: retainer 36, 56, 76:
37, 57, 77: Lower wedge-
38, 58, 78: upper wedge-
39: Male terminal opening 59: Male terminal opening
100: housing body 101: terminal accommodating chamber
102: Hollow die 103: Cylinder loss
104: Lance 105: Locking projection
106: downward space 107:
108: sealing material 110: retainer
111: wedge-
122: Terminal holding room (for large arm terminal fittings)

Claims

A housing main body made of a synthetic resin having at least one terminal accommodating chamber in which a terminal metal fitting connected to a wire terminal is inserted and received forwardly from a rear end of the terminal accommodating chamber, A waterproof connector housing having a retainer made of a synthetic resin for preventing detachment of the waterproof connector housing,
Wherein the terminal accommodating chamber is formed in a front region of the terminal accommodating chamber and has an angular terminal connecting portion in which the terminal connecting portion of the terminal fitting is provided with a contact piece for obtaining electrical connection with the opponent terminal, And a cylindrical lid in which a waterproof rubber stopper fitted around a wire extending from a rear end side of the terminal metal fitting is inserted,
The hatching chamber has a lower lance which is elastically displaceable in a vertical direction formed in a cantilever shape forward from the rear end side of the square cylinder chamber on the bottom wall and a lower lance which is elastically displaceable in the vertical direction and which is formed in a cantilever shape from the front end side of the square- And an upper lance capable of elastic displacement,
The lower lance has a lower locking projection formed in the vicinity of the free end thereof and engaged from below with a locking hole formed in a bottom plate of the terminal connection portion when the terminal connection portion of the terminal fitting is inserted into the square-
Wherein the upper lance has an upper locking protrusion formed on its free end and engaging with an upper plate of the terminal connecting portion when the terminal connecting portion of the terminal fitting is inserted into the barrel-
The housing main body has a lower space below the lower lance for receiving elastic displacement of the lower lance and an upper space for receiving elastic displacement of the upper lance on the upper lance,
Wherein the retainer has a lower wedge-shaped protrusion portion which is respectively inserted into the lower space and the upper space when fitting the front end side of the terminal housing chamber of the housing main body to restrict the elastic displacement of the lower lance and the upper lance, And a protruding portion formed on the protruding portion.

The method according to claim 1,
The hollow cylindrical chamber is formed as a hollow chamber in a columnar convex portion which is fitted in the concave portion formed in the retainer,
The upper lance is configured to be partially displaced by the coaxial slit from the upper wall of the square barrel comprising the plate-shaped wall of the columnar convex portion to be elastically displaceable,
And the slit is sealed by engagement between the recessed portion of the retainer and the columnar convex portion.

3. The method according to claim 1 or 2,
Wherein the upper lance and the upper locking protrusion are disposed at a position where a rear end surface thereof is projected in an opening surface of the cylindrical loss chamber.