JP5555112B2 - Round terminals and connectors - Google Patents

Description

  The present invention relates to a round terminal and a connector using the round terminal.

  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.

  12 is a schematic cross-sectional view of the connector, FIG. 13A is a perspective view showing the appearance of the round terminal, FIG. 13B is a schematic cross-sectional view of the main part thereof, and FIG. 14 is a side view of the round terminal. 15 is an enlarged sectional view taken along the line HH in FIG. 14, FIG. 16 is a sectional view taken along the arrow I in FIG. 15, FIG. 17 is a sectional view taken along the line JJ in FIG. 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. It is sectional drawing which shows the process until a shape terminal is double-locked by a lance and a spacer with a proper attitude | position.

  This connector includes a connector housing 501 having a terminal insertion hole 502 extending in the front-rear direction, a terminal 52020 inserted from the rear into each terminal insertion hole 502 of the connector housing 501, and a secondary locking of the inserted terminal 520. And a spacer 30 to be (mainly locked). Each terminal insertion hole 502 of the connector housing 501 is a flexible lock that prevents the terminal 520 from being pulled backward (primary lock) when the terminal 520 is inserted into the terminal insertion hole 502 from the rear. A lance 503 as an arm is provided.

  The terminal insertion hole 502 is a circular hole, and the terminal 520 is a round terminal whose cylindrical shape is the electrical connection portion 21 that is fitted and connected to a terminal on the mating connector side.

  In addition to the terminal insertion hole 502, the connector housing 501 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 intersecting the insertion direction of the terminal 520 with respect to the spacer insertion recess 35 (upward in this example), and is finally locked to the connector housing 501 while being inserted into the spacer insertion recess 35. As a result, the terminal 520 is engaged to play a role of secondarily locking the movement of the terminal 520 in the front-rear direction.

  The lance 503 is provided on the upper side of the inner periphery of the terminal insertion hole 502 (directly above the center of the cross section of the terminal insertion hole 502), and in the vertical direction (radial direction of the terminal insertion hole 502 = arrow E direction in FIG. 18). 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 520 has a cylindrical box portion 21 as an electrical connection portion that receives a male terminal of a mating connector at the front portion, and is engaged with a lance 503 of the connector housing 501 on the rear side of the box portion 21. In addition, an engaging portion 525 for positioning the round terminal 520 in the rotational direction in the engaging process is provided, and an electric wire connecting portion (conductor connecting portion 26 and covering connecting portion 27) is further provided on the rear side thereof. .

  The engagement portion 525 of the round terminal 520 has an engagement recess 523 formed by recessing the two opposing surfaces of the cylindrical peripheral wall constituting the box portion 21 by substantially the same dimension, and this engagement recess 523 is formed. Four corners 524c (FIG. 15) having a substantially rectangular cross section in which the cylindrical peripheral wall remaining at the position has a short side 524b and the inner bottom wall 523a of the engagement recess 523 has a long side 524a are subjected to a force for generating a rotational moment. And a rotation direction posture control unit 524.

  The engagement recess 523 is provided to prevent the movement of the round terminal 520 in the front-rear direction by fitting the engagement edge 503 c of the movable end of the lance 503 and the engagement edge 33 a of the spacer 30. The inner bottom wall 523a of the engaging recess 523 is a positioning surface that is finally positioned in the rotational direction by the engaging edge 33a of the spacer 30.

  Further, the rotation direction posture control unit 524 has a round terminal by a rotation moment generated by contact pressure when the engagement edge portion 503c of the lance 503 presses and contacts the corner portion 524c of the rotation direction posture control unit 524 having a rectangular cross section. 520 is provided to give rotation for rotational direction posture control.

  In this case, the rotation direction posture control unit 524 has a substantially rectangular cross section, and the contact position when the engagement edge 503c of the lance 503 and the engagement edge 33a of the spacer 30 hit the corner 524c. 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 524) O of the round terminal 520.

  When assembling this connector, the round terminal 520 is inserted into the terminal insertion hole 502 of the connector housing 501 from the rear with the spacer 30 held in the temporary locking position. When the round terminal 520 is inserted, the lance 503 is pushed upward by the electrical connection portion 21 and the terminal 520 is inserted to the end. When the terminal 520 is inserted, the engagement edge portion 503c of the lance 503 is a corner portion of the rotational direction posture control portion 524. The 524c is pressed and contacted by an elastic reaction force.

  Then, as shown in FIGS. 18A and 18B, when the pressing contact load F of the lance 503 hits the corner portion 524c of the rotation direction posture control unit 524, a rotation moment in the arrow C direction is applied to the round terminal 520. And the posture of the round terminal 520 in the rotational direction is corrected. As shown in FIG. 18 (b), when the spacer 30 is inserted upward in a state where it has been corrected to some extent, the spacer 30 is finally locked to the connector housing 501, and the engagement edge 33a of the spacer 30 is By hitting the corner portion 524c of the rotation direction posture control unit 524, the round terminal 520 is rotated to have a predetermined posture. In this state, the lance 503 is engaged with the upper engagement recess 523 of the round terminal 520, the engagement edge 33a of the spacer 30 is engaged with the lower engagement recess 523, and the round terminal 520 is engaged with the lance. 503 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. 15 to 17, in the conventional round terminal 520, the rotation direction posture control unit 524 of the engaging portion 525 has a length that is half the long side 524 a and is opposed to two sides 544 a. A pair of bent pieces 544 having a U-shaped cross-section with the side 524b remaining as the connection side 544b is disposed so as to face each other to form a substantially rectangular cross-section. At this time, the short side 524b is formed as a wall plate continuous with the cylindrical peripheral wall before and after the engagement portion 525, and the long side 524a is formed at both ends in the front and rear direction of the cylinder before and after the engagement portion 525. It was formed by forming a wall plate separated from the peripheral wall via a separation line 544e and bending the wall plate (corresponding to two sides 544a) inward via a bent portion 544d. In addition, a notch 544c that cuts into the short side 524b side for facilitating bending of the wall plate (corresponding to two sides 544a) is provided at the end of the separation line 544e.

  Therefore, as shown in FIGS. 16 and 17, since there are many bent portions (because there are four locations), there are a total of eight locations K where the notches 544c exist, and the short side 524b and the engagement portion 525 It has been found that the substantial cross-sectional area of the connecting portion with the front and rear cylindrical peripheral walls is reduced, the connection strength is weakened accordingly, and the terminal strength may be reduced.

  In consideration of the above circumstances, an object of the present invention is to provide a round terminal with improved terminal strength as much as possible and a connector using the round terminal.

  In order to solve the above-mentioned problem, the round terminal of the invention of claim 1 has a cylindrical electrical connection portion fitted and connected to a terminal on the mating connector side at the front portion, and at the rear portion of the electrical connection portion. A round terminal having an engaging portion for engaging with a locking member on the connector housing side and positioning in the rotational direction in the engaging process, and having a wire connecting portion on the rear side of the engaging portion; The engaging portion is formed by denting opposite two surfaces of the cylindrical peripheral wall constituting the electrical connecting portion by substantially the same dimension, and the engaging recess engages with the engaging member; Four corners having a substantially rectangular cross section with the cylindrical peripheral wall remaining at the position where the concave portion is formed as a short side and the inner bottom wall of the engaging concave portion as a long side are subjected to a force for generating a rotational moment. A rotation direction and posture control unit that is a point, and the rotation direction and posture control unit includes the short direction A pair of bent pieces having an L-shaped cross section with one side as the other side and the other side as the other side are arranged in a point-symmetric posture with the long side facing the long side and the short side facing the short side. It is formed in a substantially rectangular cross section, the short side is formed as a wall plate continuous with the cylindrical peripheral wall before and after the engaging portion, and the long side is at both ends in the front and rear direction before and after the engaging portion. A wall plate separated from the cylindrical peripheral wall via a separation line is formed by bending the wall plate inward, and at the end of the separation line, for facilitating bending of the wall plate A notch for biting into the short side is provided.

  A round terminal according to a second aspect of the present invention is the round terminal according to the first aspect, wherein a recess that allows the locking member to enter is formed on the long side from the outside. To do.

  The connector of the invention of claim 3 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, and the terminals of the connector housing. In the connector provided with a flexible lance that prevents 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. The terminal comprises the round terminal according to claim 1, and the engagement recess of the round terminal is fitted with a lance as the locking member, so that the front and rear of the round terminal It is provided to prevent movement in the direction.

  A connector according to a fourth aspect of the present invention is the connector according to the third aspect, wherein the connector housing is provided with a spacer insertion recess from the outer peripheral surface of the connector housing to the inside, and the spacer insertion recess has the A spacer as the locking member is inserted in a direction crossing the insertion direction of the round terminal, and the spacer is permanently locked to the connector housing in a state of being inserted into the spacer insertion recess, An engagement edge portion of a spacer is engaged with an engagement recess located on the opposite side of the lance of the round terminal, and the movement of the round terminal in the front-rear direction is secondarily locked. .

  According to the first aspect of the present invention, the rotational direction posture control unit is formed in a substantially rectangular cross section by arranging a pair of bent pieces having an L-shaped cross section in a point symmetrical posture, so that the number of bent portions is reduced. be able to. Therefore, the location where the notch for bending exists can be reduced, and the connection strength before and behind the engaging portion can be increased.

  According to the invention of claim 2, since the recess is provided from the outside on the long side of the rotation direction posture control unit having a substantially rectangular cross section, the engagement allowance of the engagement recess with respect to the locking member can be increased accordingly, The locking force can be increased.

  According to the invention of claim 3, since the posture of the round terminal in the rotational direction is automatically corrected in the process of engaging the lance with the engagement recess of the round terminal, the directionality is not minded. It becomes possible to easily insert the terminal.

  According to invention of Claim 4, since a terminal can be latched double by a lance and a spacer, a terminal can be fixed more reliably.

It is a block diagram of the round terminal of 1st Embodiment of this invention, (a) is an external appearance perspective view, (b) is sectional drawing of an engaging part. It is a side view of the same round terminal. It is a BB arrow sectional view of Drawing 2. It is D arrow line view of FIG. Sectional drawing of the principal part of the connector using the same round terminal, (a) is a sectional view showing the initial state of the rotational attitude control by the lance, (b) is a state when the rotational attitude control by the lance has advanced to some extent (C) is an enlarged view which shows the structure of the engaging edge part of a lance. It is sectional drawing which compares the structure of the principal part of the round terminal of 1st Embodiment of this invention, and the round terminal of 2nd Embodiment, (a-1) is the rotation direction attitude | position of the round terminal of 1st Embodiment. Cross-sectional view of the control unit, (b-1) is a cross-sectional view showing a state in which the rotational direction posture control unit is combined with a lance and a spacer, and (a-2) is a rotational direction posture control of the round terminal of the second embodiment. (B-2) is sectional drawing which shows the state which combined the rotation direction attitude | position control part with the lance and the spacer. It is sectional drawing of the rotation direction attitude | position control part of the round terminal of 3rd Embodiment of this invention. It is sectional drawing of the rotation direction attitude | position control part of the round terminal shown as a comparative example of 3rd Embodiment of this invention. It is sectional drawing which shows the modification of a connector housing. It is a perspective view which shows typically the principal part structure of the connector housing. It is sectional drawing seen from the front for the effect | action description when a round terminal is inserted in the connector housing. 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 a block diagram of the round terminal developed previously, (a) is an external appearance perspective view, (b) is a schematic sectional drawing of an engaging part. It is a side view of the same round terminal. It is HH arrow sectional drawing of FIG. FIG. 16 is a view as viewed from an arrow I in FIG. 15. It is JJ arrow sectional drawing of FIG. It is operation | movement explanatory drawing of the principal part of the connector developed previously, (a) is sectional drawing of the principal part which shows the state which inserted the round terminal in the circular terminal insertion hole of the connector housing, (b) is round by the effect | action of a lance. Sectional drawing of the principal part which shows the state in the middle of the position of the rotation direction of a shape terminal being corrected, (c) is a lance in a proper posture by inserting a spacer to a final locking position on it. It is sectional drawing of the principal part which shows the state latched double by the spacer.

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

  FIG. 1 is a configuration diagram of a round terminal according to the first embodiment, FIG. 1A is an external perspective view, FIG. 1B is a cross-sectional view of an engaging portion, and FIG. 2 is a side view of the round terminal. 3 is a cross-sectional view taken along the line BB in FIG. 2, FIG. 4 is a cross-sectional view taken along the arrow D in FIG. 3, and FIG. 5 is a cross-sectional view of the main part of the connector using the round terminal. FIG. 5B is a cross-sectional view showing a state where the rotational posture control by the lance has progressed to some extent, and FIG. 5C is a cross-sectional view showing the initial state of the rotational posture control by the lance. It is an enlarged view which shows a structure. Refer to FIG. 12 for the outline of the connector, and refer to FIG. 18 for the configuration of the spacer 30.

  As shown in FIGS. 1 to 4, the round terminal 20 of this embodiment has a cylindrical electrical connection portion 21 fitted and connected to a terminal on the mating connector side at the front portion, and the electrical connection portion 21. At the rear part, there is an engaging part 25 that engages with a locking member (lance 3 or spacer 30) on the connector housing 1 (see FIGS. 4 and 12) side and performs positioning in the rotational direction in the engaging process. Further, an electric wire connecting portion (conductor connecting portion 26 and covering connecting portion 27) is provided on the rear side of the engaging portion 25.

  The engaging portion 25 is formed by denting the opposed two surfaces of the cylindrical peripheral wall constituting the electrical connecting portion 21 by substantially the same dimension, and the engaging concave portion into which the locking member (lance 3 or spacer 30) is engaged. 23 and four corners 24c having a substantially rectangular cross section in which the cylindrical peripheral wall remaining at the position where the engagement recess 23 is formed is a short side 24b and the inner bottom wall 23a of the engagement recess 23 is a long side 24a. And a rotational direction posture control unit 24 having an action point for receiving a force for generating a rotational moment.

  The rotation direction posture control unit 24 has a pair of bent pieces 44, 44 having an L-shaped cross section in which the short side 24b is one side 44b and the long side 24a is the other side 44a, and the long side 24a and the long side 24a face each other and are short. By arranging the side 24b and the short side 24b in a point-symmetrical manner facing each other, the cross section is formed in a substantially rectangular shape. Further, the short side 24a is formed as a wall plate continuous with the cylindrical peripheral wall before and after the engaging portion 25, and the long side 24a has a line 44e separating the both ends in the front and rear direction from the cylindrical peripheral wall before and after the engaging portion 25. The wall plate is formed by bending the wall plate inward via a bent portion 44d. In addition, a cutout 44c that cuts into the side of the short side 24b for facilitating the bending of the wall plate is provided at the end of the separation line 44e.

  As described above, when the rotation direction posture control unit 24 of the round terminal 20 is formed in a substantially rectangular cross section by arranging the pair of bent pieces 44, 44 having an L-shaped cross section in a point symmetrical posture, The number can be reduced. Therefore, the location A where the notch 44c for bending is present (the location indicated by the symbol A in FIG. 1B) can be reduced, and the short side 24b and the cylindrical peripheral wall before and after the engaging portion 25 can be reduced accordingly. The substantial cross-sectional area of the connecting portion can be increased, and the connecting strength before and after the engaging portion 25 can be increased.

  Next, a connector constructed using this round terminal 20 will be described.

  As shown in FIG. 12, the connector includes a connector housing 1 having terminal insertion holes 2 extending in the front-rear direction, round terminals 20 inserted from the rear into the terminal insertion holes 2 of the connector housing 1, And a spacer 30 (locking member) for secondary locking (main locking) of the terminal 20 formed. 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 (locking member) as an arm is provided.

  The lance 3 is provided above 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 E in FIG. 5). It is possible to bend.

  The point where the terminal insertion hole 2 is a circular hole is the same as the previously developed connector, and the difference is 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 E in FIG. 5), 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.5 (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.

  Then, as shown in FIGS. 5A and 5B, when the pressing contact load F of the lance 3 acts on the corner portion 24 c of the rotation direction posture control unit 24, a rotational moment is generated in the round terminal 20. The posture of the round terminal 20 in the rotational direction is corrected. Next, when the spacer 30 is inserted upward in a state corrected to some extent as shown in FIG. 5B, the spacer 30 is finally locked to the connector housing 1 and the engaging edge 33a of the spacer 30 rotates 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.

  During this operation, the lance 3 applies a pressing load F against the upper corner portion 24c of the rotational direction posture control unit 24 in an obliquely inclined posture, thereby generating a rotational moment in the rotational direction posture control unit 24 and rotating the rotational direction posture control unit 24. The direction / attitude control unit 24 is controlled so as to be oriented in 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. As shown in FIG. 5A, when the rotation angle of the rotation direction attitude control unit 24 (angle with respect to the horizontal line) is large due to the attitude of the round terminal 20 in the rotation direction, the rotation direction attitude control is performed. The corner 24c at the upper end of the portion 24 hits the steep slope 3b near the vertex 3a at the center in the width direction of the engaging edge 3p of the lance 3, and receives a load N1 for generating a rotational moment from the steep slope 3b. Since the direction of the load N1 at this time is a direction perpendicular to the steep slope 3b, the angle is almost horizontal.

  Further, as shown in FIG. 5B, as the rotation angle (angle with respect to the horizontal line) 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 hits the gentle slope 3c. Thus, the corner portion 24c of the rotational direction posture control unit 24 receives the load N2 for generating the rotational moment from the gentle slope 3c. Since the direction of the load at this stage is a direction perpendicular to the gentle slope 3c, it becomes an angle closer to the vertical than in the case of (a).

  Therefore, even if the rotation of the rotation direction / posture control unit 24 advances and the generation direction of the rotation moment P changes, the load N1 applied to the rotation direction / posture control unit 24 from the lance 3 so as to follow the change. , The direction of N2 changes, the direction in which the load is applied and the direction in which the rotational moment is generated are kept as close as possible, and sufficient rotational force can be generated in the rotational direction posture control unit 24. Thus, 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.

  Next, the round terminal 120 of 2nd Embodiment is demonstrated with reference to FIG.

  When the long side 24a of the rotation direction posture control unit 24 is set substantially perpendicular to the short side 24b as in the round terminal 20 of the first embodiment shown in FIG. In addition, the engagement allowance of the spacer 30 with respect to the engagement recess 23 is determined by the distance until the lance 3 and the spacer 30 come into contact with the long side 24a. Therefore, in the round terminal 120 of the second embodiment, the bending angle α of the long side 24a with respect to the short side 24a is set to be smaller than 90 °, and the recess 125 is provided at a position corresponding to the long side 24a. By doing in this way, since the position of the long side 24a of 2nd Embodiment can be retracted inside from the position of the long side 24a of 1st Embodiment, the engagement allowance of the engagement recessed part 23 is increased by that much. Can do. As shown in FIGS. 6A-2 and B-2, the increment is indicated by d. Accordingly, the lance 3 and the spacer 133 can be moved inward as much as the engagement margin increases, and the locking force can be increased. Here, the engagement edge portion 133 a of the spacer 133 is also formed in a mountain shape in cross section following the lance 3.

  Next, the round terminal 220 of the third embodiment will be described with reference to FIG.

  In the round terminal 220 of the third embodiment, a trough-shaped recess 225 is provided at the center of the long side 24 a of the rotation direction posture control unit 224. Thus, also when the dent 225 is provided, the same effect as the second embodiment can be obtained.

  Further, as shown in the comparative example of FIG. 8, there is a case where a valley-shaped dent 325 is provided at the center of the long side constituting the rotational direction posture control unit 324 having the same structure as the round terminal of the previously developed product. The same effect can be obtained in terms of the increase in cost.

  FIGS. 9-11 has shown the modification of the terminal insertion hole 2 of the connector housing 1 which inserts a round terminal.

  As shown in this example, by providing a groove 2 a having a V-shaped cross section or a rectangular cross section along the longitudinal direction on the inner bottom surface of the terminal insertion hole 2, the wire contact portion 21 of the round terminal 20 smaller than the inner diameter of the terminal insertion hole 2. Can be positioned by the two edges 2c of the groove 2a. Therefore, the shaft of the round terminal 20 can be prevented from being shaken in the terminal insertion hole 2, and the rotation shaft when the round terminal 20 rotates can be stabilized. Therefore, it can support in the state which is easy to rotate, and the attitude | position control of a rotation direction becomes easy.

DESCRIPTION OF SYMBOLS 1 Connector housing 2 Terminal insertion hole 3 Lance 20,120,220 Round terminal 21 Electrical contact part 23 Engagement recessed part 23a Bottom wall surface 24,124,224 Rotation direction attitude | position control part 24a Long side 24b Short side 24c Corner | angular part 25 Engagement Part 30 Spacer 35 Spacer insertion recess 44 L-shaped bent piece 125,225 Recess

Claims (4)

It has a cylindrical electrical connection part that is fitted and connected to the terminal on the mating connector at the front part, and engages with a locking member on the connector housing side at the rear part of the electrical connection part and rotates in the engagement process. A round terminal having an engaging portion for positioning the wire and a wire connecting portion on the further rear side of the engaging portion,
The engaging portion is formed by denting opposing two surfaces of a cylindrical peripheral wall constituting the electrical connecting portion by substantially the same dimension, and an engaging recess with which the locking member engages, and the engaging recess A point of action for receiving a force for generating a rotational moment at four corners of a substantially rectangular cross section with the cylindrical peripheral wall remaining at the position where the cylindrical recess remains at the short side and the inner bottom wall of the engagement recess as the long side A rotation direction and posture control unit,
The rotation direction posture control unit is configured to form a pair of bent pieces having an L-shaped cross section in which the short side is one side and the long side is the other side, the long side and the long side face each other, and the short side and the short side are It is formed in a substantially rectangular cross-section by placing it in a point-symmetric posture facing each other,
The short side is formed as a wall plate continuous with the cylindrical peripheral wall before and after the engaging portion,
The long side is formed by bending both ends in the front-rear direction into a wall plate separated from the cylindrical peripheral wall before and after the engagement portion via a separation line, and bending the wall plate inward, and the separation A round terminal characterized in that a notch that cuts into the short side for facilitating bending of the wall plate is provided at an end of a wire. The round terminal according to claim 1,
A round terminal characterized in that a recess capable of entering the locking member is formed on the long side of the rotation direction posture control unit from the outside. 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 backward when inserted into the terminal insertion hole,
The terminal insertion hole is a circular hole, and the terminal is a round terminal according to claim 1 or 2,
The connector, wherein the engagement recess of the round terminal is provided to prevent the round terminal from moving in the front-rear direction by fitting a lance as the locking member. The connector according to claim 3,
A spacer insertion recess is provided in the connector housing from the outer peripheral surface of the connector housing to the inside, and a spacer as the locking member is inserted into the spacer insertion recess in a direction crossing the insertion direction of the round terminal. Has been
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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