JP2018085230A - Wire holding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure tenacity of electric wire.SOLUTION: A wire holding member is a shield connector 10 including a covered conductor 20 where a core wire 21 is covered with an insulation coating 22, and a housing 40 for housing the covered conductor 20 by inserting in the cross direction, while providing an exposed part 23 where the core wire 21 is exposed at the front end of the covered conductor 20. The housing 40 includes a locking cylinder part 45 having a positioning protrusion 48 locking to the front end of the insulation coating 22 from the front, and a biting portion 49 biting into the insulation coating 22. A binding band 60 for pressing the locking cylinder part 45 toward the insulation coating 22 is fixed to the locking cylinder part 45.SELECTED DRAWING: Figure 5

Description

  The technology disclosed by this specification is related with an electric wire holding device.

For example, what is described in Unexamined-Japanese-Patent No. 2014-26746 (the following patent document 1) is known as an electric wire holding | maintenance apparatus holding the some electric wire to which the terminal was connected.
This electric wire holding device has a pair of holding members that are assembled so as to face each other in the vertical direction, and a plurality of electric wires can be obtained by sandwiching each electric wire from both sides in the vertical direction by arc-shaped holding grooves provided in each holding member. It is held by a pair of holding members.

JP 2014-26746 A

  By the way, generally, there is a tendency that a slight variation occurs in the wire diameter as the wire diameter increases. For this reason, when the electric wire holding device as described above is applied to a thick electric wire having a large electric wire diameter, when the electric wire diameter is slightly narrowed, the electric wire is easily displaced in the holding groove, and the electric wire When the holding force is reduced, the electric wire may be detached from the holding member. Moreover, also when an electric wire diameter becomes thin by age-related deterioration of an electric wire, the holding force holding an electric wire will fall.

  In this specification, the technique of ensuring the retention strength of an electric wire is disclosed.

  The technology disclosed in this specification is provided with an electric wire in which a core wire is covered with an insulating coating and an exposed portion in which a part of the core wire is exposed, and the electric wire is inserted in the extending direction of the electric wire. An electric wire holding device comprising: a housing that engages the insulating coating at an end portion of the insulating coating on the exposed portion side from the exposed portion side in the extending direction of the electric wire. It has a latching portion that is in a stagnation state, and a pressing member that presses the latching portion toward the insulating coating is fixed to the housing.

  According to the electric wire holding device having such a configuration, the end portion of the insulating coating and the locking portion are locked in the front-rear direction, and the holding portion bites into the insulating coating, thereby securing the holding force of the electric wire with respect to the housing. Thus, it is possible to prevent the electric wire from being displaced in the direction in which the electric wire extends with respect to the housing or from being detached from the housing. As a result, for example, even when the wire diameter varies, or when the wire deteriorates with age and the wire diameter becomes thin, the wire is prevented from being displaced relative to the housing, or the wire is not detached from the housing. be able to.

The electric wire holding device disclosed by this specification is good also as the following structures.
The locking portion is extended in the front-rear direction, which is the extending direction of the electric wire, and protrudes from the extended piece toward the electric wire side, and is an end on the exposed portion side in the insulating coating It is good also as a structure which has the positioning protrusion latched from the front to the front-end part which is a part, and the biting part which protrudes toward the said electric wire side from the said extension piece, and bites into the outer surface of the said insulation coating.

According to such a configuration, since the biting portion bites into the opposite surface of the insulation coating, even when an external force is applied to the electric wire in the front-rear direction, the electric wire is displaced in the direction in which the electric wire extends with respect to the housing. The electric wire can be prevented from being detached from the housing.
In addition, when an external force is applied to the front of the electric wire, the front end of the insulating coating and the positioning protrusions are locked in the front-rear direction in addition to the biting portion, so that the front of the electric wire is stopped against the housing. be able to. Thereby, it can hold stably in the state where the electric wire was positioned with respect to the housing.

The front end portion of the biting portion may be perpendicular to the extending direction of the electric wire, and the insulating coating of the electric wire may be a locking surface that contacts from the front.
According to such a configuration, when the electric wire is pulled backward, the engagement surface of the biting portion that has digged into the insulating coating of the electric wire and the insulating coating of the electric wire are locked in the front-rear direction, so that the housing is The electric wire can be further prevented from being displaced rearward, and the holding force of the electric wire can be further increased.

The electric wire may be inserted into the housing from the rear, and the biting portion may be configured as a guide surface that is inclined toward the electric wire as the rear end portion moves forward.
According to such a configuration, when the electric wire is inserted into the housing, the insulating coating of the electric wire is guided to the front end guide surface, so that, for example, the biting portion and the insulating coating of the electric wire are caught and insulated. It is possible to prevent the coating from being damaged. As a result, it can suppress that the latching force of a positioning protrusion and a biting part, and insulation coating falls.

  The extending piece is provided to extend forward, and when the electric wire is inserted into the housing, the biting portion, the positioning protrusion, and the insulating coating interfere with each other in a direction away from the electric wire. When the electric wire is elastically displaced and the electric wire is disposed at a proper receiving position, interference between the positioning protrusion and the insulating coating is released, and the positioning protrusion is arranged immediately before the front end portion of the insulating coating, and the biting portion It is good also as a structure which bites into the said insulation coating.

  According to such a configuration, when the electric wire is inserted into the housing, the biting portion, the positioning protrusion, and the insulating coating interfere with each other so that the extension piece is elastically displaced, and the electric wire is arranged at the proper accommodation position. Since the positioning projection and the front end of the insulation coating can be locked in the front-rear direction, and the biting portion bites into the insulation coating, for example, after the electric wire is arranged at a normal assembly position with respect to the housing, the insulation coating Compared with the case where the positioning protrusion is disposed in the front and the biting portion is bitten into the insulating coating, the locking structure between the locking portion and the electric wire can be easily configured.

A plurality of the locking portions may be arranged on the outer periphery of the electric wire so as to surround the electric wire.
According to such a configuration, since a plurality of locking portions are arranged on the outer periphery of the electric wire so as to surround the electric wire, for example, only one locking portion is provided, or the locking portion is provided biased to the electric wire. Compared with the case where it is, the electric wire can be locked in the circumferential direction with a good balance. Thereby, the holding force of the electric wire with respect to a housing can be made still higher, and an electric wire can be hold | maintained stably.

The said pressing member is good also as a structure provided in the strip | belt shape which bundles these latching | locking parts collectively and presses the said extension piece toward the said electric wire.
According to such a configuration, by extending the band-shaped pressing member around the outer periphery of the plurality of locking portions and bundling them, the extended pieces at the plurality of locking portions can be pressed together toward the electric wire. Thereby, compared with the case where a clip-shaped press member is assembled | attached, for example, the biting part in the extension piece of a some latching | locking part can be deeply and easily bitten by insulation coating with respect to insulation coating.

  The pressing member has a belt shape wider in the front-rear direction than the length dimension in the front-rear direction of the biting part, and is arranged on the outer side opposite to the inner side where the biting part is arranged in the extending piece. It is good also as composition which has.

  According to such a configuration, the extending piece can be pressed toward the electric wire side from the outside of each biting portion by a pressing member wider in the front-rear direction than the biting portion. Compared to a pressing member arranged outside the pressing member and the biting portion of the extended piece, the biting portion can be surely bited by the insulating coating.

  According to the technology disclosed in this specification, it is possible to ensure the holding force of the electric wire.

Perspective view of shield connector Cross section of shield connector Longitudinal section of shield connector Sectional drawing in the AA line of FIG. 4 is a partially enlarged cross-sectional view of the shield connector corresponding to the cross section taken along line BB in FIG. Partially exploded perspective view of shield connector Top view of housing Front view of housing DC sectional view of FIG. DD sectional view of FIG. Longitudinal sectional view showing a state where a covered electric wire is inserted into the housing A longitudinal sectional view showing a state where a round terminal is connected to a covered electric wire inserted through a housing

<Embodiment>
An embodiment of the technology disclosed in this specification will be described with reference to FIGS.
The present embodiment illustrates a shield connector (an example of “electric wire holding device”) 10 that is assembled to a case (not shown) of the device.

  As shown in FIGS. 1 to 3, the shield connector 10 includes a covered electric wire (an example of “electric wire”) 20, a round terminal 30 connected to the end of the covered electric wire 20, and a housing 40 that houses the covered electric wire 20. And a shield shell 80 assembled to the housing 40. In FIG. 1, the shield shell 80 is not shown.

  As shown in FIGS. 2 to 5, the covered wire 20 forms a core wire 21 by twisting a plurality of metal wires excellent in conductivity, and covers the periphery of the core wire 21 with an insulating coating 22 made of synthetic resin. It is formed by that. The front end portion of the covered electric wire 20 (the end portion of the covered electric wire 20) is an exposed portion 23 where the core wire 21 is exposed, as shown in FIGS. In addition, the front end portion of the insulating coating 22 protrudes radially outward from the exposed portion 23 (core wire 21) over the entire circumference.

  The round terminal 30 is configured by pressing a metal plate having excellent conductivity and is connected to a flat terminal connection portion 31 and a covered electric wire 20 as shown in FIGS. 1 to 3. The electric wire connection part 32 and the connection part 33 which connects the terminal connection part 31 and the electric wire connection part 32 are comprised.

  The terminal connection portion 31 is provided with a bolt hole 31 </ b> A through which a bolt (not shown) can be inserted so as to penetrate in the vertical direction, which is the thickness direction of the terminal connection portion 31. The terminal connecting portion 31 is superposed on a case-side terminal (not shown) provided in the case, and is bolted with a bolt inserted into the bolt hole 31A, thereby being bolted to the case-side terminal. Yes.

  The electric wire connecting portion 32 is a so-called open barrel type in which a pair of barrel pieces 34 are provided on the side edges on both sides in the width direction of the bottom plate on which the core wire 21 of the covered electric wire 20 is placed. The electric wire connecting portion 32 has a pair of barrel pieces 34, and the pair of barrel pieces 34 are wound from both sides in the width direction around the core wire 21 exposed by peeling off the insulating coating 22 at the end of the covered electric wire 20. By being crimped, the core wire 21 of the covered electric wire 20 is electrically connected.

  The connecting portion 33 extends slightly forward from the wire connecting portion 32 and then extends obliquely forward and downward, and the terminal connecting portion 31 is connected to the front edge of the connecting portion 33.

  The housing 40 is made of synthetic resin and has a cylindrical shape that penetrates in the front-rear direction as shown in FIGS. 2, 3, 9 and 10, and is fitted into a mounting hole (not shown) provided in the case. It has a substantially cylindrical housing body 41 that can be mated.

  As shown in FIGS. 2 and 3, a seal mounting groove 42 in which an annular rubber ring R is mounted is formed in the front outer peripheral surface of the housing body 41. The rubber ring R seals between the inner peripheral surface of the mounting hole and the inner surface 42A of the seal mounting groove 42 when the housing body 41 is fitted into the mounting hole of the case.

  In the housing main body 41, the covered electric wire 20 is accommodated in a state of being inserted from the rear so as to penetrate in the front-rear direction. As shown in FIGS. 2, 3, and 5, when the covered electric wire 20 is disposed at the proper housing position in the housing main body 41, the insulating coating 22 of the covered electric wire 20 is drawn forward from the housing main body 41. It becomes a state.

  As shown in FIGS. 2, 3, and 5, the inside of the housing body 41 is a rubber plug housing portion 44 whose rear side is wider than the front side of the housing body 41 in the front-rear direction substantially central portion. In the rubber plug housing portion 44, an annular rubber plug 70 that is externally fitted to the covered electric wire 20 is housed from behind.

  As shown in FIG. 6, the rubber plug 70 includes a plurality of outer peripheral lips 70A formed on the outer peripheral surface of the rubber plug 70 and a plurality of inner peripheral lips 70B formed on the inner peripheral surface of the rubber plug 70. Have. As shown in FIGS. 2, 3, and 5, when the rubber plug 70 is housed in a regular rubber plug housing position, which is the front end portion in the rubber plug housing section 44, the outer peripheral lip 70 </ b> A becomes the rubber plug housing section 44. The inner peripheral lip 70B is in close contact with the outer peripheral surface of the insulating coating 22 of the covered electric wire 20 over the entire periphery, so that the inner peripheral lip 70B is in close contact with the inner peripheral surface. It is designed to seal.

  In addition, a back retainer 72 that prevents the rubber plug 70 from coming off backward is attached to the rear end portion of the rubber plug housing portion 44. As shown in FIGS. 2, 3 and 6, the back retainer 72 includes a substantially cylindrical retainer main body 73, and a rubber plug retaining portion 74 provided in a flange shape at the outer peripheral edge of the front end of the retainer main body 73. It is configured with.

  The retainer main body 73 has a shape that is long in the front-rear direction, and a pair of ribs 73 </ b> A protruding outward are provided at both ends of the retainer main body 73 in the vertical direction over the entire length of the retainer main body 73. Is formed. In addition, the covered electric wire 20 can be inserted in the retainer main body portion 73 in the front-rear direction, and the covered electric wire 20 is inserted into the retainer main body portion 73 so that the covered electric wire 20 is rearward from the housing 40. It is drawn straight out.

  The rubber stopper retaining portion 74 can be accommodated in the rear end portion of the rubber stopper accommodating portion 44. When the rubber stopper retaining portion 74 is accommodated at a proper retaining position in the rubber stopper accommodating portion 44, the rubber stopper is stopped. The front end surface of the retaining portion 74 is in contact with the rear end surface of the rubber plug 70, and the rear end surface of the housing main body 41 and the rear end surface of the rubber plug retaining portion 74 are flush with each other.

  Further, as shown in FIG. 3, the both ends in the vertical direction of the outer peripheral surface of the rubber plug retaining portion 74 can be fitted into locking holes 41A provided through the inside and outside of the vertical ends of the housing body 41. A locking projection 75 is provided. When the rubber plug retaining part 74 is accommodated in the regular retaining position in the rubber stopper accommodating part 44, the locking projection 75 is fitted into the locking hole 41A, thereby causing the rubber stopper retaining part 74 to be authorized. The rubber stopper 70 is held in the retaining position to prevent the rubber stopper 70 from falling off the housing 40.

  The shield shell 80 is made of a conductive metal. As shown in FIGS. 2 and 3, the shield shell 80 is formed in a substantially cylindrical shape covering the entire circumference of the covered electric wire 20 drawn backward from the back retainer 72, and the outer peripheral surface of the shield shell 80. A braided wire (not shown) that covers the covered electric wire 20 drawn rearward from the shield shell 80 is electrically connected. The shield shell 80 is electrically connected to the outer surface of the case by being bolted to a case (not shown).

  The housing 40 has a substantially cylindrical locking cylinder portion (an example of a “locking portion”) 45 provided at the front end portion of the housing body 41 as shown in FIGS. 2, 3, and 5. ing. The locking cylinder portion 45 is formed to have a smaller diameter than the housing main body 41, and extends along the covered electric wire 20 from the front wall 44 </ b> A of the rubber plug housing portion 44 in the housing main body 41 to a position where the core wire 21 of the covered electric wire 20 is exposed. It is set as the form extended straight ahead toward the front. Therefore, the front end portion of the housing main body 41 is configured such that the large-diameter cylindrical portion 43 having the seal mounting groove 42 is disposed on the outer periphery of the locking cylindrical portion 45.

  As shown in FIG. 5, the inner diameter dimension D <b> 1 of the locking cylinder portion 45 is a dimension that matches the outer diameter dimension D <b> 2 of the covered electric wire 20, and the housing body 41 is inserted into the locking cylinder portion 45. The covered electric wire 20 is inserted in an adapted state having a slight gap S1.

  Further, as shown in FIGS. 6 to 10, the locking cylinder portion 45 has a plurality of slits 46 extending in the front-rear direction from the front end of the locking cylinder portion 45 to a position slightly behind the front end position of the housing body 41. Is provided.

  As shown in FIG. 8, each slit 46 is provided so as to penetrate the locking cylinder portion 45 inward and outward, and a total of four positions including two diagonally upper portions and two diagonally lower portions of the locking cylindrical portion 45. Is formed. Therefore, the latching cylinder portion 45 is divided by the slits 46 so that the front end portion is a free end and elastically displaced outward in the radial direction with a base end portion between the rear end positions of the adjacent slits 46. A total of four elastic pieces (an example of an “extending piece”) 47 that can be vertically and horizontally are formed.

  In other words, each elastic piece 47 has a form extending toward the front with the front end portion as a free end and the rear end position between adjacent slits 46 as a base end portion. It is equally arranged on the outer periphery of the covered wire 20 so as to surround the wire 20.

  Further, as shown in FIGS. 5 and 8 to 10, each elastic piece 47 has a front end face of the insulating coating 22 in the covered electric wire 20 when the covered electric wire 20 is arranged at a proper accommodating position of the housing body 41. A positioning projection 48 that can be locked to the front from 22A and a biting portion 49 that bites into the outer surface of the insulating coating 22 are provided.

  As shown in FIGS. 8 to 10, the positioning protrusion 48 is arranged at the substantially central portion in the circumferential direction at a position slightly rearward from the front end of the elastic piece 47. It is provided in the place. As shown in FIG. 2, the protruding dimension D <b> 3 of the positioning protrusion 48 is set to be substantially the same as the dimension D <b> 4 in which the insulating coating 22 protrudes from the core wire 21 in the covered electric wire 20.

  As shown in FIG. 5, the front end portion of the positioning projection 48 is provided with an inclined surface 48 </ b> A that is inclined radially inward (in the direction of the covered electric wire 20) toward the rear, and the rear end portion of the positioning projection 48. A positioning locking surface 48B perpendicular to the front-rear direction, which is the extending direction of the covered electric wire 20, is provided so as to face rearward. Then, when the covered electric wire 20 is arranged at the regular accommodation position of the housing main body 41, the positioning locking surfaces 48B are arranged at four positions that are substantially equidistant in the circumferential direction, as shown in FIGS. The insulating coating 22 is disposed close to the straight line of the front end face 22A, and the insulating coating 22 can be locked from the front by the four positioning protrusions 48.

  On the other hand, as shown in FIGS. 8 to 10, the biting portions 49 are arranged in pairs at a position slightly closer to the inside in the radial direction than both side edge portions of the elastic piece 47 at the substantially central portion in the front-rear direction of the elastic piece 47. In the locking cylinder portion 45, eight places are provided at substantially equal intervals in the circumferential direction. As shown in FIG. 5, the protruding dimension D5 of each biting portion 49 is slightly smaller than the positioning protrusion 48 and larger than the dimension D6 of the gap S1 between the locking cylinder portion 45 and the covered electric wire 20. Is set.

  The front end portion of the bite portion 49 is provided with a locking surface 49A that is perpendicular to the front-rear direction, which is the extending direction of the covered electric wire 20, so as to face the front side. The guide surface 49B which inclines toward radial inner side (covered electric wire 20 side) is provided so that it goes to.

  Therefore, in the insertion process in which the covered electric wire 20 is inserted into the locking cylinder portion 45 from the rear, the insulating coating 22 of the covered electric wire 20 is smoothly guided forward by the guide surface 49B of the biting portion 49 and the biting portion 49. The elastic pieces 47 are elastically displaced outward in the radial direction by riding on the insulating coating 22. When the covered electric wire 20 is arranged at the proper housing position of the housing body 41, the elastic piece 47 returns to the natural state in which it extends straight forward, and a binding band ("pressing member") described later. An example) As shown in FIGS. 4 and 5, eight biting portions 49 arranged in the circumferential direction bite into the outer peripheral surface of the insulating coating 22 by the tightening force of 60, and the insulating coating 22 is applied to each locking surface 49A. Will be in contact from the front.

  Moreover, the outer peripheral surface of the part which protruded ahead from the front end of the housing main body 41 in the latching cylinder part 45 is made into the fixing | fixed part 50 to which the binding band 60 is fixed, as shown in FIGS.

  The binding band 60 has a band shape, and is, for example, a known binding band made of synthetic resin or metallic. As shown in FIG. 5, the width dimension D7 of the binding band 60 is larger than the length dimension D8 in the front-rear direction of the biting portion 49, and the length in the front-rear direction of the locking cylinder portion 45 protruding from the front end of the housing body 41. The length dimension is set smaller than the dimension D9.

  As shown in FIG. 4, the binding band 60 is fixed by being wound around the outer peripheral surface of the substantially central portion in the front-rear direction of the fixing portion 50 so that the elastic pieces 47 are bundled together. The elastic piece 47 is pressed against the covered electric wire 20 by a tightening force (winding force), and the biting portion 49 is forced to bite into the outer peripheral surface of the insulating coating 22. In other words, the binding band 60 is fixed to the outer side in the radial direction which is the opposite side to the inner side where the biting portion 49 is arranged in each elastic piece 47.

  On the other hand, drop-off prevention protrusions 51 are provided at the front end positions of both ends in the up-and-down direction of the fixed portion 50 (elastic pieces 47 at both ends in the up-and-down direction).

  The drop-off prevention protrusion 51 is provided on the radially outer side so as to protrude from the block strip, and the binding band 60 is locked from the front by locking the binding band 60 wound and fixed around the fixing portion 50. It is designed to prevent falling forward.

The present embodiment is configured as described above. Next, the assembly procedure of the shield connector 10 will be briefly described, and the operation and effect will be described.
In assembling the shield connector 10, first, the rubber plug 70 and the back retainer 72 are passed through the covered electric wire 20 before the insulation coating 22 is peeled off, and the covered electric wire 20 is moved from the rear to the housing main body 41 of the housing 40. The covered electric wire 20 is inserted into the housing 40 in the front-rear direction.

  In the process of inserting the covered electric wire 20, when the covered electric wire 20 enters the locking cylinder portion 45 and the covered electric wire 20 is inserted up to the position of the biting portion 49, the insulating coating 22 of the covered electric wire 20 is moved to each elastic piece 47. It contacts the guide surface 49B in the biting portion 49. When the covered electric wire 20 is further inserted as it is, the biting portion 49 and the insulating coating 22 interfere with each other, whereby the insulating coating 22 is smoothly guided by the guide surface 49B, and each positioning protrusion 48 rides on the insulating coating 22. Each elastic piece 47 is elastically displaced toward the radially outer side. When the covered electric wire 20 is further inserted as it is, the positioning projection 48 and the insulating coating 22 interfere with each other, and the elastic pieces 47 are further elastically displaced toward the radially outer side, so that the covered electric wire 20 moves the housing 40 in the front-rear direction. It penetrates so that it may penetrate.

  Next, as shown in FIG. 11, the insulation coating 22 at the front end, which is the terminal portion of the covered electric wire 20, is peeled off. As a result, the front end portion of the insulating coating 22 protrudes radially outward from the core wire 21 over the entire circumference.

  Then, as shown in FIG. 12, the pair of barrel pieces 34 of the wire connection portion 32 in the round terminal 30 is crimped to the exposed core wire 21, and the round terminal 30 is electrically connected to the covered wire 20.

  Next, when the covered electric wire 20 is pulled back and the covered electric wire 20 is pulled back to the normal housing position with respect to the housing 40, the interference between the positioning protrusions 48 and the insulating cover 22 is released, and the elastic pieces 47 are elasticized. Elastically returns toward the inside in the radial direction. As a result, each biting portion 49 is in a state of biting into the outer peripheral surface of the insulating coating 22. At this time, although the interference between the positioning projection 48 and the insulating coating 22 is released, the biting portion 49 and the insulating coating 22 remain interfering with each other, so that the elastic restoring force of the elastic piece 47 is small. When the elastic piece 47 does not return completely elastically and the elastic return force of the elastic piece 47 is large, the elastic piece 47 is almost in the same state as when it is completely elastically returned.

  Finally, the binding band 60 is wound around the substantially central portion in the front-rear direction of the fixing portion 50 in the locking cylinder portion 45, and the elastic pieces 47 (locking cylinder portions 45) are collectively tightened, and FIGS. As shown in FIG. 5, each elastic piece 47 is pressed against the covered electric wire 20. As a result, each biting portion 49 bites deeper into the insulating coating 22, and the positioning projection 48 is disposed in proximity to the front of the front end face 22A of the insulating coating 22, and the shield connector 10 is completed.

  As shown in FIGS. 8 to 10, the shield connector 10 assembled as described above is provided with the positioning protrusion 48 and the biting portion 49 evenly on the outer periphery of the covered electric wire 20 in the locking cylinder portion 45. When the covered electric wire 20 is disposed at a normal accommodation position with respect to the housing 40, the positioning protrusion 48 is disposed in front of the front end surface 22A of the insulating coating 22 and the biting portion 49 is provided on the insulating coating 22. The biting portion 49 can be deeply bitten into the insulating coating 22 by fixing the binding band 60 to the fixing portion 50 of the locking cylinder portion 45.

  That is, the positioning locking surface 48B of each positioning projection 48 and the front end surface 22A of the insulating coating 22 of the covered wire 20 are locked in the front-rear direction at four locations in the circumferential direction, so that the front of the covered wire 20 with respect to the housing 40 can be obtained. Stopped.

  Further, each biting portion 49 bites into the outer peripheral surface of the insulating coating 22, so that the insulating coating 22 comes into contact with the eight locking surfaces 49 </ b> A in the circumferential direction, and the rear end of the covered electric wire 20 with respect to the housing 40 is stopped. At the same time, securing the holding power of the covered electric wire 20 to the housing 40 prevents the covered electric wire 20 from being detached from the housing 40.

  That is, as in the conventional case, for example, when the thick wire having a large wire diameter is applied, the wire diameter varies as compared with the case where the covered wire is held by sandwiching the covered wire from both sides in the vertical direction by a pair of holding members. Even when the outer diameter of the covered electric wire 20 is slightly reduced due to deterioration of the covered electric wire 20 over time, the covered electric wire 20 may be displaced in the front-rear direction with respect to the housing 40, or The electric wire 20 can be prevented from being detached from the housing 40, and the covered electric wire 20 can be stably held by the housing 40.

  Further, for example, the holding power of the covered wire 20 with respect to the housing 40 is increased in a balanced manner as compared with a case where only one elastic piece is provided or a case where a plurality of elastic pieces are provided with a bias with respect to the covered wire. The covered electric wire 20 can be stably held by the housing 40.

  Moreover, according to this embodiment, although it is necessary to fix the binding band 60 lastly, the covered electric wire 20 is inserted into the locking cylinder portion 45 of the housing 40, and the covered electric wire 20 is pulled back to the proper accommodation position. As a result, the positioning locking surface 48B of the positioning projection 48 can lock the front end surface 22A of the insulating coating 22 from the front, and a locking structure in which the biting portion 49 has bited into the insulating coating 22 can be configured. For example, compared with the case where the covering wire 20 is disposed in the normal accommodation position with respect to the housing and the positioning protrusion 48 is disposed in front of the insulating coating 22 and the biting portion is bitten into the insulating coating, A locking structure with the housing 40 can be easily configured.

  Further, according to the present embodiment, the biting portion 49 of each elastic piece 47 is provided with the guide surface 49B that is inclined inward in the radial direction toward the front, so that the insulating coating 22 of the covered electric wire 20 is directed forward. Can be guided smoothly. Thereby, it can suppress that the insulation coating 22 damages, for example by the biting part 49 and the insulation coating 22 of the covered electric wire 20 being caught. As a result, it can suppress that the latching force of the insulation coating 22, the positioning protrusion 48, and the biting part 49 falls.

  Further, according to the present embodiment, the binding band 60 is wound around the outer peripheral surface of the fixing portion 50 at the substantially central portion in the front-rear direction by winding the binding band 60 wider than the length D8 in the front-rear direction. 49, since each elastic piece 47 is uniformly pressed against the insulating coating 22 of the covered electric wire 20 so that the biting portion 49 is deeply bited into the insulating coating 22, for example, from the biting portion. However, the biting portion 49 can be surely bitten by the insulating coating 22 as compared with the pressing member arranged outside the pressing member that is narrow in the front-rear direction and the biting portion of the elastic piece. That is, the holding force of the covered electric wire 20 with respect to the housing 40 can be increased in a balanced manner in the circumferential direction, and the covered electric wire 20 can be firmly held by the housing 40.

<Other embodiments>
The technology disclosed in the present specification is not limited to the embodiments described with reference to the above description and drawings, and includes, for example, the following various aspects.
(1) In the said embodiment, it was set as the structure by which only one latching cylinder part 45 was provided in the housing 40. As shown in FIG. However, the present invention is not limited to this, and a plurality of locking cylindrical portions may be provided in the housing, so that a plurality of round terminals and covered electric wires may be held in the housing.

  (2) In the said embodiment, it was set as the structure which crimped | bonded the pair of barrel pieces 34 in the electric wire connection part 32 of the round terminal 30 to the core wire 21 of the covered electric wire 20. FIG. However, the present invention is not limited thereto, and a pair of barrel pieces of male and female terminals or a closed barrel may be crimped to the core wire of the covered electric wire.

  (3) In the above embodiment, the locking cylinder portion 45 is configured by the four elastic pieces 47 on the top, bottom, left, and right. However, the present invention is not limited to this, and the locking cylinder portion may be configured by three or less elastic pieces or five or more elastic pieces. Moreover, you may comprise a latching cylinder part with a half-divided body instead of a cylinder shape.

  (4) In the above embodiment, each elastic piece 47 is provided with one positioning protrusion 48 and two biting portions 49. However, the present invention is not limited to this, and a plurality of positioning protrusions may be formed on each elastic piece, or three or more biting portions or one biting portion that is large in the circumferential direction may be provided.

10: Shield connector (an example of “electric wire holding device”)
20: Covered wire (an example of “wire”)
21: Core wire 22: Insulation coating 40: Housing 45: Locking cylinder part (an example of "locking part")
47: Elastic piece (an example of “extending piece”)
48: Positioning projection 49: Biting portion 49A: Locking surface 49B: Guide surface 60: Binding band (an example of “pressing member”)

Claims (8)

An electric wire with a core wire covered with an insulation coating;
A wire holding device comprising a housing that houses the electric wire in the extending direction of the electric wire in a state in which an exposed portion that exposes a part of the core wire is provided,
The housing has a locking portion that locks into the end portion of the insulating coating on the exposed portion side from the exposed portion side in the extending direction of the electric wire, and that is in a state of biting into the insulating coating,
An electric wire holding device in which a pressing member that presses the locking portion toward the insulating coating is fixed to the housing. The locking portion extends in the front-rear direction, which is the direction in which the electric wire extends, and
A positioning projection protruding from the extension piece toward the electric wire side and locking from the front to the front end which is an end of the exposed portion of the insulating coating;
The electric wire holding device according to claim 1, further comprising a biting portion that protrudes from the extending piece toward the electric wire side and bites into an outer surface of the insulating coating.   The electric wire holding device according to claim 2, wherein a front end portion of the biting portion is perpendicular to an extending direction of the electric wire and is an engaging surface with which the insulating coating of the electric wire contacts from the front. The electric wire is inserted into the housing from behind,
The electric wire holding device according to claim 2 or 3, wherein a rear end portion of the biting portion is a guide surface that is inclined toward the electric wire side toward the front.   The extending piece is provided to extend forward, and when the electric wire is inserted into the housing, the biting portion, the positioning protrusion, and the insulating coating interfere with each other in a direction away from the electric wire. When the electric wire is elastically displaced and the electric wire is disposed at a proper receiving position, interference between the positioning protrusion and the insulating coating is released, and the positioning protrusion is arranged immediately before the front end portion of the insulating coating, and the biting portion The wire holding device according to any one of claims 2 to 4, wherein the bite cuts into the insulating coating.   The electric wire holding device according to any one of claims 2 to 5, wherein a plurality of the locking portions are arranged on an outer periphery of the electric wire so as to surround the electric wire.   The wire holding device according to claim 6, wherein the pressing member is provided in a belt shape that bundles the plurality of locking portions together and presses the extending piece toward the electric wire.   The pressing member has a strip shape wider in the front-rear direction than the length dimension in the front-rear direction of the biting part, and is arranged on the outer side opposite to the inner side where the biting part of the extension piece is arranged. The electric wire holding device according to claim 7.

Images