JP2012069464A - Connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector capable of smoothly and reliably controlling a rotational posture of a circular terminal by a lance.SOLUTION: An engagement edge 3p of a lance 3 is in contact with a corner 24c of a rotation direction posture control part 24 of a circular terminal 20 with an approximate rectangular section, so as to rotate the rotational direction posture control part 24. The engagement edge 3p of the lance 3 is formed in a chevron shape having inclined planes on both sides of the circular terminal 20 in a rotational direction, and having a peak 3a at a center in a width direction corresponding to a center O of a terminal insertion hole 2. In particular, the incline planes include a steep inclined plane 3b provided near the peak, and a gradual inclined plane 3c extending and inclined at an angle milder than the steep inclined plane 3b in a direction for separating from the peak 3a. Thereby, regardless of a rotation position of the rotational direction posture control part 24, action directions γ1, γ2 of load applied to the rotational direction posture control part 24 from the lance 3 are made coincide with directions ω1, ω2 of a rotation moment generated to the rotational direction posture control part 24 as much as possible.

Description

  The present invention relates to a connector for preventing a terminal inserted into a terminal insertion hole from behind by a flexible lance provided so as to face the internal space of the terminal insertion hole.

  In many conventional connectors used for vehicles, for example, as shown in Patent Document 1, for example, a rectangular terminal insertion hole is formed in a connector housing, and a rectangular electric connection portion is provided in the front portion of each terminal insertion hole. It has a configuration in which a square terminal is inserted. However, when using a square terminal, it is necessary to confirm the direction around the axis of the terminal when it is inserted into the terminal insertion hole, but when the terminal is downsized as the connector is downsized, the terminal It becomes difficult to confirm the directionality of the terminal at the time of insertion, so that becomes small.

  On the other hand, the example of the connector using the round terminal with a cylindrical-shaped electric wire connection part is shown in patent document 2 and patent document 3, for example. In this type of connector, the lance on the connector housing side is engaged with the rear end of the cylindrical electrical connection portion of the round terminal, so that the terminal can be inserted into the terminal insertion hole without worrying about the directionality. It is like that.

JP 2008-65985 A JP-A-5-258895 JP 2008-123913 A

  However, even when the conventional round terminal is used, it may be necessary to ensure the directionality of the mating connector with respect to the terminal. For example, when the male tab terminal of the mating connector is received in the electrical connection part of the round terminal and the contact pressure between the terminals is secured with a leaf spring built in the electrical connection part, Round terminals must be assembled to the connector housing to ensure proper orientation. Even in other cases, there may be many cases where it is necessary to ensure the directionality of the round terminals in the future.

  However, when the terminal is downsized, it is very difficult to assemble the terminal to the connector housing while confirming the directionality, not only for the square terminal but also for the round terminal.

  Therefore, when inserting the terminal into the terminal insertion hole of the connector housing, the terminal can be inserted into the terminal insertion hole without worrying about the directionality, and when the terminal is completely inserted, the terminal is rotated due to the round terminal. There was a request to use the ease to automatically correct the terminal orientation by the biasing force of the lance.

  In order to meet such a demand, the present applicant has previously developed a round terminal and a connector as shown in FIGS.

  2 is a schematic cross-sectional view of the connector, FIG. 3 is a perspective view showing the external appearance of the round terminal, and FIGS. 4A to 4C are diagrams in which the round terminal is inserted into the circular terminal insertion hole of the connector housing. The position of the round terminal in the rotational direction is corrected by the action of the lance, and then the spacer is inserted to the final locking position until the round terminal is double locked by the lance and the spacer in the proper posture. It is sectional drawing which shows the process of.

  This connector includes a connector housing 101 having terminal insertion holes 102 extending in the front-rear direction, terminals 20 inserted into the terminal insertion holes 102 of the connector housing 101 from the rear, and secondary locking of the inserted terminals 20. And a spacer 30 to be (mainly locked). Each terminal insertion hole 102 of the connector housing 101 has a flexible lock that prevents the terminal 20 from coming back (primary lock) when the terminal 20 is inserted into the terminal insertion hole 102 from the rear. A lance 103 as an arm is provided.

  The terminal insertion hole 102 is formed of a circular hole, and the terminal 20 is formed of a round terminal having a cylindrical electrical connection portion 21 that is fitted and connected to a terminal on the mating connector side.

  In addition to the terminal insertion hole 102, the connector housing 101 is provided with a spacer insertion recess 35 from the outer peripheral surface (the lower surface in this example) toward the inside. The spacer 30 is inserted in a direction (upward in this example) intersecting the insertion direction of the terminal 20 with respect to the spacer insertion recess 35, and is finally locked to the connector housing 101 while being inserted in the spacer insertion recess 35. By doing so, it plays a role of engaging with the terminal 20 and secondarily locking the movement of the terminal 20 in the front-rear direction.

  The lance 103 is provided above the inner periphery of the terminal insertion hole 102 (directly above the center of the cross section of the terminal insertion hole 102), and in the vertical direction (radial direction of the terminal insertion hole 102 = direction of arrow A in FIG. 4). It is possible to bend. Further, the spacer 30 is provided with a recess (arc-shaped notch) 31 for inserting a terminal, and an engaging convex portion 33 is provided on the inner bottom portion of the recess 31. The upper end edge of the engaging convex portion 33 is an engaging edge portion 33 a for the terminal 20.

  On the other hand, the round terminal 20 has a cylindrical box portion 21 as an electrical connection portion for receiving the male terminal of the mating connector at the front portion, and is engaged with the lance 103 of the connector housing 101 at the rear side of the box portion 21. In addition, an engaging portion 25 for positioning the round terminal 20 in the rotating direction in the engaging process is provided, and an electric wire connecting portion 27 is further provided on the rear side thereof.

  The engagement portion 25 of the round terminal 20 is formed with an engagement recess 23 formed by recessing the opposing two surfaces of the cylindrical peripheral wall constituting the box portion 21 by substantially the same dimension, and this engagement recess 23 is formed. Four corners 24c (FIG. 4 (a)) having a substantially rectangular cross section with the cylindrical peripheral wall remaining in position as the short side 24b and the inner bottom wall 23a of the engagement recess 23 as the long side 24a are used to generate a force for generating a rotational moment. And a rotation direction / posture control unit 24 as a receiving action point. The engaging portion 25 can also be used as a core caulking portion of the electric wire W.

  The engagement recess 23 is provided to prevent the movement of the round terminal 20 in the front-rear direction by fitting the engagement edge 103 c of the movable end of the lance 103 and the engagement edge 33 a of the spacer 30. The inner bottom wall 23a of the engaging recess 23 serves as a positioning surface on which positioning in the rotational direction is finally performed by the engaging edge 33a of the spacer 30.

  Further, the rotation direction posture control unit 24 has a round terminal by a rotation moment generated by a contact pressure when the engagement edge portion 103c of the lance 103 presses and contacts the corner portion 24c of the rotation direction posture control unit 24 having a rectangular cross section. 20 is provided to give rotation for controlling the rotation direction posture.

  In this case, the cross section of the rotation direction posture control unit 24 has a substantially rectangular shape, and the contact position when the engagement edge 103c of the lance 103 and the engagement edge 33a of the spacer 30 hit the corner 24c. The direction in which the rotational moment acts is determined by the positional relationship with the cross-sectional center (the center of the rotational direction attitude control unit 24) O of the round terminal 20.

  When assembling this connector, the round terminal 20 is inserted into the terminal insertion hole 102 of the connector housing 101 from the rear with the spacer 30 held in the temporary locking position. When the round terminal 20 is inserted, the lance 103 is pushed upward by the electrical connecting portion 21 and the terminal 20 is inserted until the contact is reached. 24c is pressed and contacted by an elastic reaction force.

  Then, as shown in FIGS. 4A and 4B, when the pressing contact load F of the lance 103 hits the corner 24 c of the rotation direction posture control unit 24, a rotational moment in the direction of arrow C is applied to the round terminal 20. And the posture of the round terminal 20 in the rotational direction is corrected. As shown in FIG. 4B, when the spacer 30 is next inserted upward in a state where it has been corrected to some extent, the spacer 30 is permanently locked to the connector housing 101, and the engaging edge 33a of the spacer 30 is By hitting the corner 24c of the rotation direction posture control unit 24, the round terminal 20 is rotated to have a predetermined posture. In this state, the lance 103 is engaged with the upper engagement recess 23 of the round terminal 20, the engagement edge 33a of the spacer 30 is engaged with the lower engagement recess 23, and the round terminal 20 is engaged with the lance 103. 103 and the spacer 30 are double-locked.

  By the way, as a result of diligent research by the present applicant, it has been found that the previously developed connector has the following new problems to be solved.

  That is, as shown in FIGS. 5 and 6, the engaging edge 103 a of the lance 103 is provided with an inclined surface having a certain angle so that a rotational force can be easily applied to the rotational direction posture control unit 24. When the inclined surface hits the corner 24c of the rotational direction posture control unit 24, the rotational direction posture control unit 24 generates a rotational force. However, an effective rotational force is applied to the round terminal 20 by the load of the lance 103. It was found that there is a possibility not to be given.

  For example, when the center line K along the longitudinal direction of the rotation direction attitude control unit 24 has an angle δ with respect to the horizontal line (horizontal direction) S due to the attitude of the round terminal 20 in the rotation direction, the rotation direction attitude control unit 24 The engaging edge 103c of the lance 103 hits the corner 24c at the upper end of the lance 103, and a biasing force (load for generating a rotational moment) N from the lance 103 acts on the contact point. The direction in which the load N acts (represented by an angle γ with respect to the horizontal line S) is a direction perpendicular to the engaging edge portion 103c of the lance 103 that hits the contact point. Further, the direction of the rotational moment P generated in the rotational direction posture control unit 24 when the engaging edge portion 103c of the lance 103 hits the corner portion 24c of the rotational direction posture control unit 24 (represented by an angle ω with respect to the horizontal line S) is The direction is perpendicular to the straight line G drawn from the rotation center O of the rotation direction posture control unit 24 to the corner 24c that is the contact point.

  Here, when the angle of the inclined surface (angle θ with respect to the vertical line) of the engaging edge portion 103c of the lance 103 is constant as in the previously developed connector, the lance 103 moves to the corner portion 24c of the rotational direction posture control unit 24. The direction γ of the applied load N is always constant. On the other hand, the direction ω of the rotation moment P generated in the rotation direction / posture control unit 24 changes according to the change in the rotation angle δ (represented by the angle δ with respect to the horizontal line S) of the rotation direction / posture control unit 24. That is, ω increases as δ decreases due to the attitude control action of the lance 103. Therefore, if the direction γ to which the load from the lance 103 is applied and the direction ω of the rotational moment coincide with each other, the load of the lance 103 can be most effectively converted into the rotational force of the rotational direction posture control unit 24. As γ and ω are shifted by the rotation angle δ of the rotation direction / posture control unit 24, the load F of the lance 103 is not effectively converted into the rotation force of the rotation direction / posture control unit 24.

  When the spacer 30 is inserted while the rotational posture of the round terminal 20 is not halfway without effectively generating a rotational force in the rotational direction posture control unit 24, not only the insertion operation of the spacer 30 becomes smooth, but also the round terminal It may happen that the 20 postures cannot be finally controlled to an appropriate state.

  In view of the above circumstances, an object of the present invention is to provide a connector that can smoothly and reliably control the rotation posture of a round terminal by a lance.

  In order to solve the above-mentioned problem, the connector of the invention of claim 1 comprises a connector housing having terminal insertion holes extending in the front-rear direction, and terminals inserted from the rear into the terminal insertion holes of the connector housing. A connector provided with a flexible lance in each terminal insertion hole of the connector housing for preventing the terminal from coming out backward when the terminal is inserted into the terminal insertion hole from the rear. The terminal insertion hole is a circular hole, and the terminal is configured as a round terminal having a cylindrical shape as an electrical contact portion that is fitted and connected to a terminal on the mating connector side, and at the rear of the electrical connection portion, An engagement portion that engages with the lance and positions the round terminal in the rotational direction in the engagement process is provided, and an electric wire connection portion is further provided on the rear side of the engagement portion. The engaging portion of the child includes an engaging recess formed by recessing two opposing surfaces of the cylindrical peripheral wall constituting the electrical connection portion by substantially the same dimension, and the cylinder remaining at the position where the engaging recess is formed. A rotation direction and attitude control unit having four corners having a substantially rectangular cross section with a peripheral wall as a short side and a long side as an inner bottom wall of the engaging recess, as acting points for receiving a force for generating a rotational moment. The engaging recess is provided as an engagement edge of the movable end of the lance so as to prevent the round terminal from moving in the front-rear direction, and the rotational direction posture control unit is The engagement edge portion is provided to give rotation for rotational direction posture control to the round terminal by a rotational moment generated by a contact pressure when the engagement edge portion is pressed against the corner portion. The terminal insertion hole can be bent in the radial direction. The engaging edge of the lance extends along a direction perpendicular to the bending direction of the lance, and has inclined surfaces on both sides in the rotational direction of the round terminal and corresponds to the center of the terminal insertion hole. Formed in a cross-sectional mountain shape having an apex at the center in the width direction, and the inclined surface has a steep slope provided near the apex, and a gentler angle than the steep slope in a direction smoothly connected to the steep slope and away from the apex. And a gentle slope extending obliquely.

  A connector according to a second aspect of the present invention is the connector according to the first aspect, wherein the connector housing is provided with a spacer insertion recess from the outer peripheral surface of the connector housing toward the inside, and the spacer insertion recess has the A spacer is inserted in a direction intersecting with the insertion direction of the round terminal, and the spacer is finally locked to the connector housing in a state of being inserted into the spacer insertion recess, whereby the round terminal The engagement edge of the spacer is engaged with an engagement recess located on the opposite side of the lance, and the movement of the round terminal in the front-rear direction is secondarily locked.

  According to the first aspect of the present invention, since the steep slope and the gentle slope are provided at the engagement edge of the lance, a load is applied from the lance to the rotational direction posture control unit regardless of the rotational angle of the rotational direction posture control unit. It is possible to make the direction and the direction of the rotational moment generated in the rotational direction posture control unit as close as possible, and to effectively convert the load of the lance into the rotational force of the terminal and to control the rotation of the terminal. As a result, the rotational attitude control of the round terminal by the lance can be performed smoothly and reliably, and the assembly of the connector can be ensured and facilitated.

  According to invention of Claim 2, since a terminal can be doubly locked with a lance and a spacer, a terminal can be fixed more reliably.

BRIEF DESCRIPTION OF THE DRAWINGS It is principal part block diagram of embodiment of this invention, (a) is sectional drawing which shows the initial state of rotation attitude | position control by a lance, (b) is sectional drawing which shows a state when rotation attitude control by a lance progresses to some extent. (C) is an enlarged view which shows the structure of the engaging edge part of a lance. It is a sectional side view which shows schematic structure of the common part of the connector of embodiment of this invention, and the connector developed previously. It is an external appearance perspective view which shows the structure of the round terminal used in common in the connector of embodiment of this invention, and the connector developed previously. It is operation | movement explanatory drawing of the principal part of the connector developed previously, (a) is principal part sectional drawing which shows the state which inserted the round terminal in the circular terminal insertion hole of the connector housing, (b) is round shape by the effect | action of a lance. Cross-sectional view of the main part showing a state in which the position in the rotational direction of the terminal is being corrected, (c) is to insert the spacer up to the final locking position on the terminal, and to fix the round terminal in a proper posture and the spacer. It is principal part sectional drawing which shows the state double-locked by. It is a figure for demonstrating the subject of the connector developed previously, (a) is sectional drawing which shows the initial state of the rotation attitude | position control by a lance, (b) shows the state when rotation attitude control by a lance progressed to some extent. It is sectional drawing shown. It is a figure which shows typically the relationship of the direction of force when the inclined surface of the engagement edge part of a lance and the corner | angular part of the rotation direction attitude | position control part of a round terminal contact | abutted.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a configuration diagram of a main part of the embodiment, FIG. 1A is a cross-sectional view showing an initial state of rotational attitude control by a lance, and FIG. 1B is a state when the rotational attitude control by the lance has advanced to some extent. FIG. 1C is an enlarged view showing the configuration of the engagement edge portion of the lance. 2 and 3 for the outline of the connector and the configuration of the round terminal, and FIG. 4 for the configuration of the spacer 30.

  As shown in FIG. 2, this connector is inserted with a connector housing 1 having terminal insertion holes 2 extending in the front-rear direction, and terminals 20 inserted from the rear into the terminal insertion holes 2 of the connector housing 1. And a spacer 30 for secondary locking (final locking) of the terminal 20. Each terminal insertion hole 2 of the connector housing 1 is a flexible lock that prevents the terminal 20 from being pulled backward (primary lock) when the terminal 20 is inserted into the terminal insertion hole 2 from the rear. A lance 3 as an arm is provided.

  The lance 3 is provided on the upper side of the inner periphery of the terminal insertion hole 2 (directly above the center of the cross section of the terminal insertion hole 2), and in the vertical direction (radial direction of the terminal insertion hole 2 = direction of arrow A in FIG. 1). It is possible to bend.

  The point that the terminal insertion hole 2 is formed of a circular hole, the point that the terminal 20 is formed of a round terminal, and the like are the same as those of the previously developed connector, and the differences are as follows.

  That is, the engagement edge 3p of the lance 3 extends along a direction orthogonal to the bending direction of the lance 3 (the direction of arrow A in FIG. 1), and is inclined on both sides in the rotational direction of the round terminal 20. (3a, 3b to be described later) and a mountain-shaped cross section having a vertex 3a at the center in the width direction corresponding to the center of the terminal insertion hole 2.

  In particular, the inclined surface includes a steep slope 3b provided near the apex 3a, and a gentle slope 3c extending smoothly and incline at a gentler angle than the steep slope 3b in a direction that is smoothly connected to the steep slope 3b and away from the apex 3a. I have. Here, the vertex 3a is formed in an arc shape. If the angle formed with the vertical line of the steep slope 3b is θ1, and the angle formed with the vertical line of the gentle slope 3c is θ2, then θ1> θ2. In addition, L1 and L2 in FIG.1 (c) are tangents of the steep slope 3b and the gentle slope 3c.

  When this connector is assembled, the round terminal 20 is inserted into the terminal insertion hole 2 of the connector housing 1 from the rear with the spacer 30 held in the temporary locking position. When this round terminal 20 is inserted, the lance 3 is pushed upward by the electrical connecting portion 21 and the terminal 20 is inserted until the end of the contact, and the engaging edge portion 3p of the lance 3 is a corner portion of the rotational direction posture control portion 24. 24c is pressed and contacted by an elastic reaction force.

  As shown in FIGS. 1A and 1B, the pressing contact load F of the lance 3 acts on the corner portion 24 c of the rotation direction posture control unit 24, so that a rotational moment is generated in the round terminal 20. The posture of the round terminal 20 in the rotational direction is corrected. When the spacer 30 is next inserted upward in a state corrected to some extent as shown in FIG. 1B, the spacer 30 is finally locked to the connector housing 1 and the engaging edge 33a of the spacer 30 is rotated in the rotational direction. By hitting the corner portion 24c of the posture control unit 24, the round terminal 20 is rotated so as to have a predetermined posture. In this state, the lance 3 is engaged with the engagement recess 23 on the upper side of the round terminal 20, the engagement edge 33a of the spacer 30 is engaged with the engagement recess 23 on the lower side, and the round terminal 20 is engaged with the lance. 3 and the spacer 30. Therefore, the terminal 20 can be reliably fixed.

  In this operation, as shown in FIG. 6, the center line K along the longitudinal direction of the rotation direction attitude control unit 24 is at an angle δ with respect to the horizontal line (horizontal direction) S due to the attitude of the round terminal 20 in the rotation direction. , The engaging edge 3p of the lance 3 hits the corner 24c at the upper end of the rotational direction attitude control unit 24, and the urging force (load for generating a rotational moment) from the lance 3 is applied to the contact point. N acts. The direction in which the load acts (represented by an angle γ with respect to the horizontal line S) is a direction perpendicular to the engagement edge 3p of the lance 3 that hits the contact point. The direction of the rotational moment P generated in the rotational direction posture control unit 24 when the engagement edge 3p of the lance 3 hits the corner portion 24c of the rotational direction posture control unit 24 (represented by an angle ω with respect to the horizontal line S) is The rotation direction posture control unit 24 is in a direction perpendicular to the straight line G drawn from the rotation center (center of the terminal insertion hole 2) O to the corner portion 24c.

  The lance 3 hits the corner 24c at the upper end of the rotational direction posture control unit 24 in an obliquely inclined posture, and applies a pressing load F to generate a rotational moment in the rotational direction posture control unit 24, thereby rotating the rotational direction posture control unit 24. Is controlled toward a posture along the horizontal direction.

  In this connector, the inclined surface of the engagement edge portion 3p having a mountain-shaped cross section of the lance 3 is not an inclined surface having a constant angle, but a steep slope 3b near the vertex 3a and a gentle slope 3c far from the vertex 3a. 1A, when the rotational angle δ of the rotational direction posture control unit 24 is large due to the rotational direction posture of the round terminal 20, as shown in FIG. 1A, the upper end of the rotational direction posture control unit 24 is The corner 24c hits the steep slope 3b near the apex 3a at the center in the width direction of the engagement edge 3p of the lance 3, and receives the load N1 for generating the rotational moment P from the steep slope 3b. Since the direction γ1 of the load N1 at this time is a direction perpendicular to the steep slope 3b, the angle is nearly horizontal.

  Further, as shown in FIG. 1B, as the rotation angle δ of the rotation direction / posture control unit 24 becomes smaller, the corner 24c at the upper end of the rotation direction / posture control unit 24 comes into contact with the gentle slope 3c. The corner 24c of the attitude control unit 24 receives a load N2 for generating a rotational moment from the gentle slope 3c. Since the load direction γ2 at this stage is a direction perpendicular to the gentle slope 3c, the angle is closer to the vertical than γ1.

  Therefore, even if rotation of the rotation direction / posture control unit 24 advances and the generation direction ω of the rotation moment P changes (changes from ω1 to ω2), the rotation direction / posture from the lance 3 follows the change. The directions of the loads N1 and N2 acting on the control unit 24 change (change from γ1 to γ2), and the direction in which the load is applied and the direction in which the rotational moment is generated are kept as close as possible. A sufficient rotational force can be generated in the direction / posture control unit 24, and the rotation direction / posture control unit 24 can be rotated until the end (until it becomes close to a horizontal posture).

  As a result, the rotational posture control of the round terminal 20 by the lance 3 can be performed smoothly and reliably, and the assembly of the connector can be ensured and facilitated.

DESCRIPTION OF SYMBOLS 1 Connector housing 2 Terminal insertion hole 3 Lance 3p Engagement edge 3a Vertex 3b Steep slope 3c Slow slope 20 Terminal (round terminal)
DESCRIPTION OF SYMBOLS 21 Electrical contact part 23 Engagement recessed part 23a Bottom wall surface 24 Rotation direction attitude | position control part 24a Long side 24b Short side 24c Corner | angular part 25 Engagement part 30 Spacer 33a Engagement edge part 35 Spacer insertion recessed part

Claims (2)

A connector housing having terminal insertion holes extending in the front-rear direction; and terminals inserted into the terminal insertion holes of the connector housing from the rear. The terminals are inserted into the terminal insertion holes of the connector housing from the rear. In the connector provided with a flexible lance that prevents the terminal from being pulled out backward when inserted into the terminal insertion hole,
The terminal insertion hole is a circular hole,
The terminal is configured as a round terminal having a cylindrical shape as an electrical contact portion to be fitted and connected to a terminal on the mating connector side, and is engaged with the lance at a rear portion of the electrical connection portion in the engagement process. An engaging portion for positioning the round terminal in the rotational direction is provided, and an electric wire connecting portion is further provided on the rear side of the engaging portion,
The engaging portion of the round terminal includes an engaging recess formed by recessing two opposing surfaces of the cylindrical peripheral wall constituting the electrical connection portion by substantially the same size, and a position where the engaging recess is formed. A rotational direction posture control unit having four corners of a substantially rectangular cross-section with the remaining cylindrical peripheral wall as a short side and the inner bottom wall of the engagement recess as a long side as action points for receiving a force for generating a rotational moment; Have
The engagement recess is provided to prevent movement of the round terminal in the front-rear direction by fitting an engagement edge of the movable end of the lance.
The rotation direction posture control unit gives rotation to the round terminal for rotation direction posture control by a rotation moment generated by contact pressure when the engagement edge portion of the lance comes into pressure contact with the corner portion. Provided as
On the other hand, the lance is provided so as to be able to bend in the radial direction of the terminal insertion hole,
The engaging edge of the lance extends along a direction perpendicular to the bending direction of the lance, and has inclined surfaces on both sides in the rotational direction of the round terminal and a width corresponding to the center of the terminal insertion hole. It is formed in a cross-sectional mountain shape having an apex at the center in the direction,
The inclined surface includes: a steep slope provided near the apex; and a gentle slope that extends smoothly and inclines at a gentler angle than the steep slope in a direction away from the apex. Characteristic connector. The connector according to claim 1,
In the connector housing, a spacer insertion recess is provided from the outer peripheral surface of the connector housing to the inside, and a spacer is inserted in the spacer insertion recess in a direction intersecting the insertion direction of the round terminal,
The spacer is locked to the connector housing in a state of being inserted into the spacer insertion recess, whereby the engagement edge of the spacer is placed in the engagement recess located on the opposite side of the lance of the round terminal. The connector is engaged to secondary-lock the movement of the round terminal in the front-rear direction.

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