Connector

Abstract

A lock arm (15) is in the form of a cantilever and hitting portions (25) are arranged at positions closer to the free end of the lock arm (15) than a lock portion (20), a distance from a supporting point of the resilient deformation of the lock arm (15) (leg portion (17)) to the hitting portions (25) can be made longer as compared to a seesaw-shaped lock arm. This means that larger moment forces of the hitting portions (25) can be ensured when the lock arm (15) is resiliently deformed. Therefore, a large hitting sound can be produced when two connector housings (10, 30) are properly connected.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a section showing a state where two connector housings are properly connected in one embodiment.

FIG. 2 is a section showing an intermediate state of the connecting operation of the two connector housings.

FIG. 3 is a side view of the female connector housing.

FIG. 4 is a plan view of the female connector housing.

FIG. 5 is a front view of the female connector housing.

FIG. 6 is a partial enlarged section showing a contact state of hitting portions and receiving portions.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

A connector in accordance with the invention is described with reference to FIGS. 1 to 6. The connector has a female housing 10 and a male housing 30 that are connectable with each other. In the following description, ends of the female and male housings 10, 30 that are to be connected are referred to as the fronts concerning forward and backward directions FBD or connecting direction CD.

The female housing 10 has a main body 11 in the form of a vertically long block with cavities 12 for receiving female terminals 13 that are connected with wires 14. The wires 14 are drawn from rear end of the main body 11.

A lock arm 15 is formed unitarily on the upper surface of the main body 11 of the female housing 10. The lock arm 15 has a beam 16 and a leg 17. The leg 17 extends up from the upper surface of the main body 11 at a position near the front end of the female housing 10. The beam 16 is cantilevered backward from the upper part of the leg 17 and extends substantially parallel with the connecting direction CD of the two housings 10, 30. The beam 16 of the lock arm 15 is resiliently deformable up and down towards and away from the upper surface of the main body 11 and in directions substantially normal to the connecting direction CD of the two connector housings 10, 30. The leg 17 is the support for the resilient deformation of the beam 16. In a free state where the lock arm 15 is not deformed, the beam 16 is substantially parallel to the connecting direction CD of the two housings 10, 30 and to the upper surface of the main body 11.

A front groove 18 is formed substantially at a widthwise middle of the upper surface of the beam 16 and extends from the front end of the beam 16 to a longitudinal middle position. The front groove 18 has a substantially rectangular cross section. A rear groove 19 is formed substantially at the widthwise middle of the upper surface of the beam 16 and extends from a position slightly behind the front groove 18 to the rear end of the beam 16. The rear groove 19 also has a substantially rectangular cross section. A lock 20 is formed on the upper surface of the beam 16 between the front and rear grooves 18 and 19. A middle groove 21 is formed in a widthwise middle part of the lock 20. The middle groove 21 is open in the upper and rear surfaces of the lock portion 20 and communicates with the rear groove 19. The upper surface of the lock 20 is slightly higher than the upper surface of the beam 16.

An operable portion 22 extends back from the rear end of the beam 16 and at the free end of the lock arm 15. The operable portion 22 is substantially transversely symmetrical similar to the beam 16. Two supports 23 project up and away from the housing main body 11 at opposite left and right sides of the beam 16 and project farther back from the rear end of the beam 16. A finger placing plate 24 couples the upper end ends of the supports 23 and is substantially parallel to the beam 16.

Two substantially transversely symmetrical hitting portions 25 are defined on parts of the side walls of the lock arm 15 on opposite sides of the rear groove 19 and are substantially continuous with the front ends of the supports 23 of the operable portion 22. The hitting portions 25 are behind the lock 20 with respect to the longitudinal direction of the lock arm 15 and are at an end of the lock arm 15 opposite the leg 17. Additionally, the hitting portions 25 are displaced out relative to the lock 20 in a width direction WD that is substantially normal to the connecting direction CD. Hitting surfaces 25S are defined on the tops of the hitting portions 25. The hitting surfaces 25S are substantially flat and substantially parallel to the connecting direction CD of the two housings 10, 30. Additionally, the hitting surfaces 25S are slightly higher than the upper surface of the lock 20. The beam 16 has a substantially constant width from the leg 17 to a longitudinal middle position of the lock 20. However, the operable portion 22 is wider than the beam 16. The width of the beam 16 gradually increases from the longitudinal middle position of the lock 20 to the front end of the operable portion 22, and the hitting portions 25 are arranged in this gradually widened area. Accordingly, the hitting surfaces 25S of the hitting portions 25 are widened gradually from the front ends toward the rear ends. More particularly, the hitting surfaces 25S have substantially trapezoidal shapes with oblique sides having different lengths since the inner surfaces of the supports 23 are substantially continuous extensions of the inner surfaces of the hitting portions 25 and are aligned substantially parallel to the connecting direction of the two housings 10, 30.

The male housing 30 has a receptacle 31 with an open front end for receiving the female housing 10. Long narrow male terminals 32 are accommodated in the receptacle 31. An engaging portion 34 projects down and in from an upper wall 33 of the receptacle 31 at a position near the opening edge of the receptacle 31. Receiving portions 35 are defined on parts of the upper wall 33 at opposite left and right sides of the engaging portion 34. Substantially flat receiving surfaces 35S are defined in the receptacle 31 on lower parts of the receiving portions 35 and are aligned substantially parallel to the connecting direction CD of the housings 10, 30.

The lock 20 and the engaging portion 34 interfere with each other as the female housing 10 is fit into the receptacle 31. As a result, the lock arm 15 deforms down towards the housing 11, as shown in FIG. 2, and a resilient restoring force accumulates in the lock arm 15. At this time, the hitting portions 25 are at positions substantially corresponding to or below the receiving portions 35. The lock 20 passes the engaging portion 34 as the female housing 10 is fit sufficiently to reach a properly connected state of the two housings 10, 30. Therefore, the lock arm 15 is restored resiliently towards its original posture, and the two hitting portions 25 strike the two receiving portions 35 to produce a hitting sound. The substantially flat hitting surfaces 25S achieve surface contact with the similarly flat receiving surfaces 35S to produce a large collision sound. In the properly connected state, the lock 20 and the engaging portion 34 engaged to lock the two housings 10, 30 together.

The lock arm 15 is cantilevered along the connecting direction CD of the two housings 10, 30, and the lock 20 is at a position closer to the leg 17 that supports the resilient deformation than to the free end of the lock arm 15. The hitting portions 25, however, are closer to the free end than the lock 20. Thus, a distance from the support of the resilient deformation of the lock arm 15 to the hitting portions 25 is longer as compared to the case where the lock arm 15 is seesaw-shaped. Accordingly, large moment forces of the hitting portions 25 with a center on the support of the resilient deformation of the lock arm 15 (leg 17) can be ensured when the lock arm 15 is deformed. Therefore, a large hitting sound can be produced when the two housings 10, 30 are connected properly.

The hitting portions 25 are offset from the lock 20 in the width direction WD. Thus, a degree of freedom is higher upon setting the positions of the hitting portions 25 in the longitudinal direction of the lock arm 15.

The lock arm 15 could incline in the width direction WD. In this case, a transversely offset hitting portion 25 might not contact the receiving portion 35. However, the hitting portions 25 preferably are arranged at opposite sides of the lock 20 in the width direction WD. Thus, at least one of the hitting portions 25 is certain to contact the receiving portion 35 even if the lock arm 15 is inclined, and a hitting sound is produced reliably.

The operable portion 22 for deforming the lock arm 15 in a direction to separate the lock 20 from the engaging portion 34 is at the free end of the lock arm 15. The operable portion 22 is wider than the area where the lock 20 is formed. Accordingly, an unlocking operation can be performed easily.

The hitting portions 25 that hit the receiving portions 35 gradually widen towards the operable portion 22 to increase the areas of the hitting surfaces 25S and efficiently utilize dead spaces resulting from a width difference between the formation area of the lock 20 and the operable portion 22. In this way, the sound volume of the hitting sound is increased.

The invention is not limited to the above described and illustrated embodiment. For example, the following embodiments are also embraced by the technical scope of the present invention as defined by the claims.

One, three or more hitting portions may be provided.

The hitting portions may be asymmetric with respect to the width direction WD.

The shape of the hitting surfaces of the hitting portions is not limited to the trapezoidal shape with oblique sides having different lengths, but may substantially be the shape of an isosceles trapezoid, a rectangle other than trapezoids, a triangle or the like.

Although the engaging portion, the receiving portions and the hitting portions are arranged at the same position with respect to the longitudinal direction of the lock arm in the foregoing embodiment, the engaging portion may be arranged at a position displaced from the receiving portions and the hitting portions in the longitudinal direction according to the present invention.

Claims

1. A connector, comprising: a housing (10) connectable with a mating housing (30), the housing (10) including a lock arm (15) cantilevered substantially along a connecting direction (CD) of the housing (10) with the mating housing (30), a lock (20) formed at a position of the lock arm (15) closer to a supporting point of the resilient deformation than a free end, and at least one hitting portion (25) arranged at a position on the lock arm (15) closer to the free end than the lock (20), andwherein the lock arm (15) is interfered with and resilient deformed by an engaging portion (34) of the mating housing (30) during a connecting operation of the housing (10) with the mating housing (30),wherein the lock (20) is engaged with the engaging portion (34) to hold the housing (10) with the mating housing (30) when the housing (10) is connected properly with the mating housing (30) and the lock arm (15) is restored resiliently, andwherein the at least one hitting portion (25) can hit at least one receiving portion (35) as the lock arm (15) is restored resiliently.

2. The connector of claim 1, wherein the hitting portion (25) is arranged at the position displaced from the lock (20) in a width direction (WD).

3. The connector of claim 2, wherein at least one pair of hitting portions (25) are arranged at substantially opposite sides of the lock (20) in the width direction (WD).

4. The connector of claim 1, wherein an operable portion (22) to be operated to deform the lock (20) in a direction separating the lock (20) from the engaging portion (34) is formed near the free end of the lock arm (15) and is wider than an area where the lock (20) is formed.

5. The connector of claim 4, wherein a hitting surface (25S) of the at least one hitting portion (25) to hit the receiving portion (35) is in the form of a substantially flat surface gradually widened towards the operable portion (22).

6. The connector of claim 5, wherein the inner surface of the hitting portion (25) is substantially parallel to the connecting direction (CD) of the housing (10) with the mating housing (30) so that the hitting surface (25S) has a substantially trapezoidal shape with oblique sides having different lengths.

7. A connector, comprising a housing (10) with a main body (11) having opposite front and rear ends, a lock arm (15) having a leg (17) joined to the main body (11) substantially adjacent the front end and a beam (16) cantilevered from the leg (17) towards the rear end of the main body (11), a lock (20) formed on a surface of the beam (16) facing away from the main body (11) and at a position along the beam (16) spaced rearward from the leg (17) and at least one hitting portion (25) formed on the surface of the beam (16) facing away from the main body (11) and at a position along the beam (15) so that the lock (20) is between the leg (17) and the hitting portion (25).

8. The connector of claim 7, wherein the hitting portion (25) gradually widens at positions farther from the lock (20).

9. The connector of claim 8, wherein the hitting portion (25) has a hitting surface (25S) facing away from the main body (11), the hitting surface (25S) being substantially planar.

10. The connector of claim 9, wherein the at least one hitting portion (25) comprises first and second hitting portions (25) offset laterally from one another.

11. The connector of claim 10, wherein the hitting portions (25) are offset laterally from the lock (20).

12. The connector of claim 7, further comprising an operable portion (22) at an end of the lock arm (15) remote from the leg (17), the operable portion (22) being wider than the beam (16).

13. A connector assembly, comprising: a first housing (10);a second housing (30) connectable with the first housing (10);a resiliently deformable lock arm (15) formed on the first housing (10) and cantilevered substantially along a connecting direction (CD) of the first and second housings (10, 30), a lock (20) formed on the lock arm (15) closer to a support of resilient deformation than a free end, and at least one hitting portion (25) at a position on the lock arm (15) closer to the free end than the lock (20);an engaging portion (34) formed on the second housing (30) at a position for interfering with the lock (20) during a connecting operation of the first housing (10) with the second housing (30), the lock arm (15) being restored resiliently when the housings (10, 30) are connected properly so that the lock (20) engages the engaging portion (34) to hold the first and second housings (10, 30) together; andat least one receiving portion (35) formed on the second housing (30) in a position to be engaged by the hitting portion (25) as the lock arm (15) is restored resiliently to generate a hitting sound indicating complete connection.

14. The connector assembly of claim 13, wherein the hitting portion (25) gradually widens at positions farther from the lock (20).

15. The connector assembly of claim 14, wherein the hitting portion (25) has a substantially planar hitting surface (25S).

16. The connector assembly of claim 15, wherein the at least one hitting portion (25) comprises first and second hitting portions (25) offset laterally from one another.

17. The connector assembly of claim 16, wherein the hitting portions (25) are offset laterally from the lock (20).

18. The connector assembly of claim 17, further comprising an operable portion (22) at the free end of the lock arm (15).