This application is based on and claims priority from Japanese Patent Application No. 2019-219228, filed on Dec. 4, 2019, with the Japan Patent Office, the disclosure of which is incorporated herein in their entireties by reference.
The present disclosure relates to a terminal fitting, a method of producing the same, and a connector provided therewith.
A terminal (hereinafter, referred to as a terminal fitting) such as a female terminal disclosed in Japanese Patent Laid-open Publication No. 2014-222650 includes a box-shaped housing portion (hereinafter, referred to as a body portion). The body portion includes a fourth wall portion (hereinafter, referred to as an outer wall portion) along a width direction. An upper guard piece is provided on a front end part of the outer wall portion while being bent downward. The terminal fitting of this type is also disclosed in Japanese Patent Laid-open Publication No. 2003-022859 and Japanese Patent Laid-open Publication No. 2011-154944.
Although not described in Japanese Patent Laid-open Publication No. 2014-222650, the terminal fitting is normally inserted into a cavity of a connector housing and locked by a locking lance. In this case, if a bent part of the upper guard piece is structured to contact the locking lance, the locking lance is smoothly deflected and the insertion workability of the terminal fitting can be improved.
However, the terminal fitting is often provided with a stabilizer for guiding an insertion operation into the connector housing. Here, if the stabilizer is structured to project from a wall portion other than the outer wall portion in the body portion, there is a problem of reducing a yield of the terminal fitting.
Accordingly, the present disclosure aims to improve a yield related to a terminal fitting.
This object is solved according to the invention by the features of the independent claims. Particular embodiments of the invention are subject of the dependent claims.
According to one aspect, there is provided a terminal fitting with a body portion substantially having a tubular shape and substantially extending in a front-rear direction, wherein the body portion includes an outer wall portion arranged from one end toward another end in a width direction, and the outer wall portion includes at least one bent portion curved inwardly on one end side in the width direction and having a curved outer side surface facing forward, at least one stabilizer having a bent shape and projecting outward on another end side in the width direction, and cutout portions open in a front end of the outer wall portion on both widthwise sides of the bent portion.
Accordingly, if the bent portion contacts a locking lance when the terminal fitting is inserted into a cavity of a connector housing, the locking lance can be smoothly deflected and deformed along the outer side surface of the bent portion and the insertion workability of the terminal fitting can be improved. Further, the stabilizer can guide an insertion operation of the terminal fitting into the housing. Particularly, according to the above configuration, since the stabilizer and the bent portion are efficiently and collectively provided in a formation range of the outer wall portion in the front-rear direction and the width direction, a yield can be improved.
According to a particular embodiment, the cutout portion located on the other widthwise side of the bent portion, out of the cutout portions, is open in a part of the stabilizer. According to this configuration, a width of the outer wall portion can be made smaller as compared to the case where the stabilizer, the cutout portion and the bent portion are respectively arranged side by side in the width direction. As a result, the terminal fitting can be miniaturized in the width direction.
Particularly, the stabilizer includes: a first leg portion and a second leg portion paired in the width direction, and a top portion arranged between the first and second leg portions, (i) wherein a second bent corner portion is located on another widthwise side of the top portion and connects the second leg portion and the top portion, (ii) wherein a first bent corner portion s located on one widthwise side of the top portion and connects the first leg portion and the top portion, and/or (iii) wherein a base end corner portion connects the first leg portion and the one end side in the width direction of the outer wall portion.
Further particularly, the cutout portion located on the other widthwise side of the bent portion, out of the cutout portions, is open in the base end corner portion, the first leg portion and the first bent corner portion.
Further particularly, the stabilizer includes a first leg portion and a second leg portion paired in the width direction, a top portion arranged between the first and second leg portions, a second bent corner portion located on another widthwise side of the top portion and connecting the second leg portion and the top portion, a first bent corner portion located on one widthwise side of the top portion and connecting the first leg portion and the top portion, and a base end corner portion connecting the first leg portion and the one end side in the width direction of the outer wall portion, and the cutout portion located on the other widthwise side of the bent portion, out of the cutout portions, is open in the base end corner portion, the first leg portion and the first bent corner portion. According to this configuration, since the rigidity of each of the base end corner portion and the first bent corner portion can be reduced by the cutout portion, the base end corner portion and the first bent corner portion can be easily bent and the bent shape of the stabilizer can be accurately formed.
Further particularly, the body portion includes a side wall portion arranged in a direction intersecting the outer wall portion and one corner portion connecting the outer wall portion and the side wall portion on the one end in the width direction, and the cutout portion located on the one widthwise side of the bent portion, out of the cutout portions, is open in the one corner portion. According to this configuration, since a corner shape of the one corner portion is eliminated by the cutout portion, a situation where a one-piece rubber plug is damaged due to interference with the one corner portion having the corner shape can be avoided when the terminal fitting passes through a seal hole of the rubber plug.
Further particularly, the body portion includes a side wall portion intersecting the outer wall portion on the one end in the width direction, and the side wall portion includes a fixing portion for locking either the outer wall portion or an inner wall portion at least partly overlapping the outer wall portion and retaining the tubular shape of the body portion. According to this configuration, the one end side in the width direction of the outer wall portion is a part hardly deformed by the side wall portion including the fixing portion. Thus, the positional accuracy of the bent portion located on the one end side in the width direction of the outer wall portion can be enhanced. As a result, the smoothness of a deflection operation of the locking lance can be ensured when the bent portion contacts the locking lance to deflect and deform the locking lance.
Further particularly, the stabilizer substantially is bent into a gate shape by bending the outer wall portion a plurality of times, and/or wherein the stabilizer is provided over the substantially entire length in the front-rear direction of the outer wall portion.
Further particularly, a front surface of the bent portion is arranged to substantially face forward on the front end of the outer wall portion and/or wherein a front end of the bent portion is arranged at the substantially same position as or retracted rearwardly from the front end of the stabilizer, the side wall portion and/or a base wall portion of the body portion.
According to another aspect, there is provided a connector comprising: a connector housing having at least one cavity provided therein; and at least one terminal fitting according to any one of the preceding claims at least partly insertable into the cavity.
According to another aspect, there is provided a method of producing a terminal fitting, in particular according to the above aspect or a particular embodiment thereof, comprising the following steps: providing a body portion substantially having a tubular shape and substantially extending in a front-rear direction, wherein the body portion includes an outer wall portion arranged from one end toward another end in a width direction, and forming in the outer wall portion: (i) at least one bent portion being curved inwardly on one end side in the width direction and having a curved outer side surface substantially facing forward; (ii) at least one stabilizer having a bent shape and projecting outward on another end side in the width direction; and (iii) cutout portions open in a front end of the outer wall portion on both widthwise sides of the bent portion.
According to the above, it is possible to provide a terminal fitting capable of improving a yield.
The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
In the following detailed description, reference is made to the accompanying drawings, which form a part hereof. The illustrative embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented here.
A specific example of the terminal fitting of the present disclosure is described below with reference to the drawings. Note that the present disclosure is not limited to these illustrations and is intended to be represented by claims and include all changes in the scope of claims and in the meaning and scope of equivalents.
A terminal fitting 10 of one particular embodiment is formed, such as by bending a conductive (particularly metal) plate. The terminal fitting 10 substantially has an elongated shape in a front-rear direction. As shown in
Specifically, the insulation barrel portion 13 is arranged behind the wire barrel portion 12. The wire barrel portion 12 is to be crimped or folded or bent and connected to a conductor 92 (e.g. stranded wire or the like) exposed by removing a coating 91 particularly in a front end part of the wire 90. The insulation barrel portion 13 is to be crimped or folded or bent and connected to the coating 91 (coating 91 located adjacent to or behind the exposed conductor 92) particularly in the front end part of the wire 90.
Particularly, a length in the front-rear direction of the body portion 11 is longer than the wire connection portion (particularly than the sum of those of the wire barrel portion(s) 12 and the insulation barrel portion(s) 13).
As shown in
The base wall portion 14 particularly is a lower wall of the body portion 11, substantially arranged along the width direction and connected to the wire connection portion (particularly the wire barrel portion 12) via a coupling portion 19. Specifically, the (both) side wall portion(s) 15, 16 substantially is/are arranged along a vertical direction. The inner wall portion 18 particularly constitutes an upper wall of the body portion 11 and/or particularly is arranged substantially in parallel to the base wall portion 14 while being spaced apart from the base wall portion 14. The outer wall portion 17 particularly constitutes the upper wall of the body portion 11 and/or particularly is arranged to at least partly overlap the inner wall portion 18 from above (outside). The upper wall of the body portion 11 particularly at least partly has a double wall structure by being composed of the inner wall portion 18 and the outer wall portion 17. Rear end lower part(s) of the (particularly both) side wall portion(s) 15, 16 particularly is/are connected to one or more side portions 46 of the coupling portion 19 as shown in
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The outer wall portion 17 includes at least one stabilizer 29 projecting upward or outward (particularly substantially on a half part) on the other widthwise end side. Specifically, the stabilizer 29 is bent into a gate shape by bending the outer wall portion 17 a plurality of times. The stabilizer 29 particularly is provided over the substantially entire length in the front-rear direction of the outer wall portion 17.
Specifically, as shown in
Specifically, the stabilizer 29 includes a base end corner portion 34 connecting the one widthwise end side of the outer wall portion 17 and the first leg portion 31, a first bent corner portion 35 at least partly connecting the top portion 32 and the first leg portion 31 on the one widthwise end of the top portion 32, and/or a second bent corner portion 36 at least partly connecting the top portion 32 and the second leg portion 33 on the other widthwise end of the top portion 32. The lower end of the top portion 32 particularly is a free end facing the other corner portion 25 from above.
The outer wall portion 17 includes one or more, particularly a pair of cutout portions 37, 38 open (particularly substantially in the form of rectangular recesses) in a front end. The cutout portion 37 located on the one widthwise side 1WS is open in the front ends of the one widthwise side 1WS of the outer wall portion 17, the one corner portion 26 and/or the first side wall portion 15. As shown in
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Specifically, a base end part of the bent portion 43 is curved by being bent. An outer side surface (curved outer side surface, front surface) of the bent portion 43 is arranged to substantially face forward on the front end of the outer wall portion 17. The front end of the bent portion 43 particularly is arranged at the same position as or retracted rearwardly from the front ends of the stabilizer 29, the first side wall portion 15, the second side wall portion 16 and the base wall portion 14. The lower end of the bent portion 43 is arranged to face the contact piece 21 from above.
The inner wall portion 18 includes at least one escaping recess 44 particularly open in a front end on the one widthwise end side 1WS. As shown in
Further, each of the first side wall portion 15, the second side wall portion 16, the inner wall portion 18 and the stabilizer 29 particularly includes at least one chamfered portion 45 on the front end of the outer surface thereof.
As shown in
Further, in the process of at least partly inserting the terminal fitting 10 into the cavity 61, a slope portion 63 of a locking lance 62 at least partly contacts the outer side surface of the bent portion 43, whereby the locking lance 62 is deflected and deformed. The slope portion 63 of the locking lance 62 and the outer side surface of the bent portion 43 particularly are inclined with respect to the front-rear direction to substantially conform to an inclined posture of the deflected and deformed locking lance 62. Thus, the locking lance 62 is smoothly deflected by the contact of the slope portion 63 of the locking lance 62 and the outer side surface of the bent portion 43.
If the insertion operation of the terminal fitting 10 proceeds, the locking lance 62 contacts the outer surface of the outer wall portion 17 on the one widthwise end side 1WS and the deflected state of the locking lance 62 is maintained. Thereafter, when the terminal fitting 10 is properly inserted into the cavity 61, the locking lance 62 resiliently at least partly returns and a locking projection 64 of the locking lance 62 is arranged to substantially face the rear end of the body portion 11, particularly the rear end of the stabilizer 29. In this way, the terminal fitting 10 is locked by the locking lance 62 and held and retained in the cavity 61 of the connector housing 60.
Note that, if an unillustrated one-piece resilient plug (particularly rubber plug) is mounted into the connector housing 60, the terminal fitting 10 passes through a seal hole of the one-piece resilient (rubber) plug before being inserted into the cavity 61. The seal hole has a circular cross-section and the wire 90 is inserted thereinto in a fluid-tight manner (particularly liquid-tight manner). Here, the front ends of four corners of the body portion 11 may interfere with an opening edge of the seal hole of the one-piece resilient (rubber) plug to damage the one-piece rubber plug.
In the case of this embodiment, out of the front ends of the four corners of the body portion 11, the cutout portion 37 particularly is provided in the front end of the one corner portion 26 and/or the one side recess 41 and/or the other side recess 42 is/are provided in the front ends of two corners on the side of the base wall portion 14. The cutout portion 37, the one side recess 41 and the other side recess 42 are shaped to be able to avoid contact with the opening edge of the seal hole of the one-piece resilient (rubber) plug. Thus, the damage of the one-piece resilient (rubber) plug due to interference with one or more of the four corners of the body portion 11 can be prevented.
As described above, according to this embodiment, the locking lance 62 can be smoothly deflected and deformed by the contact of the locking lance 62 with the outer side surface of the bent portion 43.
The cutout portions 37, 38 particularly paired in the width direction are provided to be open in the front end of the outer wall portion 17, and/or the bent portion 43 is provided between the pair of cutout portions 37, 38 on the one widthwise end side 1WS of the outer wall portion 17. The stabilizer 29 having a bent shape is provided on the other widthwise end side 2WS of the outer wall portion 17. Thus, the bent portion 43 and the stabilizer 29 are efficiently and collectively provided without largely projecting in the front-rear direction and the width direction of the outer wall portion 17. As a result, a yield can be improved when the terminal fitting 10 is formed or manufactured.
Further, since the cutout portion 38 particularly is also open in a part of the stabilizer 29, a width of the outer wall portion 17 can be made smaller as compared to the case where the stabilizer 29, the cutout portion 38 and the bent portion 43 are respectively arranged side by side in the width direction in the outer wall portion 17.
In addition, the cutout portion 38 particularly is open in the front ends of the base end corner portion 34, the first leg portion 31 and the first bent corner portion 35 in the stabilizer 29. Thus, the rigidity of each of the base end corner portion 34 and the first bent corner portion 35 is reduced by the cutout portion 38 and the base end corner portion 34 and the first bent corner portion 35 can be easily bent.
Further, the first side wall portion 15 of the body portion 11 particularly is provided with the fixing portion 27. By fitting the fixing piece 28 of the inner wall portion 18 into the fixing portion 27, the tubular shape of the body portion 11 is retained. Thus, the one widthwise end side 1WS of the outer wall portion 17 is hardly deformed due to the presence of the fixing portion 27.
Since the bent portion 43 is provided on the one widthwise end side 1WS of the outer wall portion 17, the positional accuracy of the bent portion 43 is enhanced. As a result, the smoothness of a deflection operation of the locking lance 62 can be ensured when the bent portion 43 deflects and deforms the locking lance 62.
The embodiment disclosed this time should be considered to be illustrative in all aspects, rather than restrictive.
Although the terminal fitting particularly is a female terminal fitting to be connected by having the tab inserted into the body portion in the case of the above embodiment, the terminal fitting may be a male terminal fitting including a tab projecting from a body portion as another embodiment.
Although the upper wall of the body portion particularly has the double wall structure by being composed of or comprising the inner wall portion and the outer wall portion in the case of the above embodiment, an upper wall of a body portion may be composed only of an outer wall portion as another embodiment.
Although the bent portion particularly is provided on the half part of the outer wall portion on the one widthwise side and the stabilizer is provided on the half part of the outer wall portion on the other widthwise side in the case of the above embodiment, a bent portion may include a part extending to the other widthwise side beyond the half part of the outer wall portion on the one widthwise side or a stabilizer may include a part extending to the one widthwise side beyond the half part of the outer wall portion on the other widthwise side as another embodiment.
Although the fixing piece to be locked by the fixing portion particularly is provided on the inner wall portion in the case of the above embodiment, a fixing piece may be provided on an outer wall portion as another embodiment.
Accordingly, it is aimed to provide a terminal fitting capable of improving a yield. Thus, a terminal fitting 10 is provided with a body portion 11 substantially having a tubular shape and/or substantially extending in a front-rear direction. The body portion 11 includes an outer wall portion 17 substantially arranged from one end toward another end in a width direction. The outer wall portion 17 includes a bent portion 43 curved on one end side in the width direction and having a curved outer side surface substantially facing forward, at least one stabilizer 29 having a bent shape and substantially projecting outward on another end side in the width direction, and one or more cutout portions 37, 38 open in a front end of the outer wall portion 17 on at least one of (particularly both) widthwise sides of the bent portion 43.
From the foregoing, it will be appreciated that various exemplary embodiments of the present disclosure have been described herein for purposes of illustration, and that various modifications may be made without departing from the scope and spirit of the present disclosure. Accordingly, the various exemplary embodiments disclosed herein are not intended to be limiting, with the true scope and spirit being indicated by the following claims.
Number | Date | Country | Kind |
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2019-219228 | Dec 2019 | JP | national |