JP2012109200A - Lock structure between metallic lance and resin component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lock structure between a terminal metal fitting and a resin component which can prevent a tip of a metallic lance from abrading resin when the metallic lance is elastically recovered.SOLUTION: A metallic lance 41B is formed by cutting and raising one portion of a terminal metal fitting 40, and is shaped to gradually project laterally from the tip side in the insertion direction to a cavity 11 toward the rear side. A lock face 31 expanding at an approximately right angle with respect to the removal direction of the terminal metal fitting 40 from the cavity 11 is formed on a wall face of the cavity 11, and the tip of the metallic lance 41B is locked on the lock face 31. Of the wall face of the cavity 11, a portion ranging from a contacted part 32 with which the metallic lance 41B is brought into elastic contact to the lock face 31 at a stage in the middle of insertion of the terminal metal fitting 40 to the cavity 11 is formed by one mold pin 60, and a portion continuing from the contacted part 32 to the lock face 31 is a chamfered part 33 having a chamfered shape.

Description

  The present invention relates to a locking structure between a metal lance and a resin component.

Conventionally, when a terminal fitting is accommodated in a cavity of a resin part, a method of locking a metal lance formed on the terminal fitting to a wall surface of the cavity is known as a means for preventing the terminal fitting from coming off ( For example, Patent Document 1).
The metal lance is formed by cutting and raising a part of the terminal fitting, and protrudes little by little from the front end side to the rear side in the insertion direction into the cavity. A locking surface that extends in a direction substantially perpendicular to the direction in which the terminal fitting is pulled out is formed on the wall surface of the cavity. In the middle of inserting the terminal fitting into the cavity, the metal lance contacts the wall surface of the cavity and is elastically deformed, and at the same time as the insertion into the cavity is completed, the metal lance is elastically restored and locked to the locking surface.

JP 2009-140700 A

  By the way, when molding a resinous part as described above, generally, a part extending from the wall surface of the cavity to the locking surface is formed by abutting a separate mold pin. That is, after a first mold pin having a molding surface that forms a locking surface and a second mold pin having a molding surface that forms a wall surface of a cavity are brought into contact with each other and molten resin is injected, these mold pins are reversed. Die cut in the direction. For this reason, the corner | angular part which makes a substantially right angle is formed in the part following the locking surface from the wall surface of a cavity. Therefore, when the metal lance is elastically restored, the tip of the metal lance may come into contact with the corner portion continuing from the wall surface of the cavity to the locking surface, and the resin may be scraped off, resulting in shavings. The occurrence of such foreign matter has been desired to take measures since it may reduce the performance of the parts.

  The present invention has been completed based on the above-described circumstances, and relates to the relationship between a metal lance and a resin component that can prevent the tip of the metal lance from scraping when the metal lance is elastically restored. It aims at providing a stop structure.

The locking structure between the metal lance and the resin component according to the present invention includes a metal lance and a resin in which the terminal fitting is accommodated in the cavity of the resin component and the metal lance formed on the terminal fitting is locked to the wall surface of the cavity. The metal lance is configured to protrude from the front end side in the insertion direction to the cavity little by little toward the rear side, and the cavity wall surface includes the cavity. A locking surface that extends in a direction substantially perpendicular to the direction in which the terminal fitting is removed from is formed, and the tip of the metal lance is locked to the locking surface, and among the wall surfaces of the cavity, In the middle of inserting the terminal fitting into the cavity, a portion extending from the contacted portion to which the metal lance is elastically contacted to the locking surface is formed with a single mold pin, and the contacted portion is The part following the stop surface is obtained by a chamfer forming a chamfered shape.
According to such a configuration, when the metal lance is elastically restored, the tip of the metal lance is unlikely to contact the corner that continues from the contacted portion to the locking surface, so that the tip prevents the resin from being scraped. be able to.
Further, the chamfered portion may be a curved surface.

The locking structure between the metal lance and the resin component according to the present invention includes a metal lance and a resin in which the terminal fitting is accommodated in the cavity of the resin component and the metal lance formed on the terminal fitting is locked to the wall surface of the cavity. A locking structure with a component, wherein a wall surface of the cavity is formed with a locking surface extending in a direction substantially perpendicular to a direction in which the terminal fitting is removed from the cavity, and the metal lance is connected to the cavity. The front end portion in the insertion direction protrudes little by little from the front end side toward the rear side, and the front end portion that engages with the engagement surface is bent inward.
According to such a configuration, when the metal lance is elastically restored, the protruding portion of the metal lance (the corner portion between the tip portion and the root side portion) slips, so that it is possible to prevent the resin from being scraped.

  Moreover, the said metal lance is good also as what the said front-end | tip part bends at an angle along the said locking surface. According to such a configuration, when a force in the pulling direction is applied to the terminal fitting, a larger portion than the tip of the metal lance contacts the locking surface, so that the resin can be prevented from being scraped. .

The resin component may be a valve socket to which a valve is mounted, and the terminal fitting may electrically connect the valve and a power supply side connector.
The terminal fitting has a male tab connected to the power supply side connector, and the metal lance is formed on a portion of the terminal fitting having a plate surface on the same plane as the male tab. Also good.

  ADVANTAGE OF THE INVENTION According to this invention, when a metal lance returns elastically, the latching structure of the terminal metal fitting and resin component which can prevent that the front-end | tip scrapes off resin can be provided.

The front view showing the valve socket in Embodiment 1. Top view of valve socket Bottom view of valve socket FIG. 3 is a cross-sectional view showing a cross-sectional configuration of the valve socket, and corresponds to a cross-section at the position AA in FIG. Schematic diagram showing the schematic configuration of the mold Top view showing valve socket with terminal fittings attached FIG. 7 is a cross-sectional view showing a cross-sectional configuration of a valve socket in a state where a terminal fitting is mounted, and is a cross-sectional view corresponding to a cross section at a position BB in FIG. Side view of terminal fitting Front view of terminal fitting Bottom view of terminal fitting Partially enlarged sectional view showing the metal lance elastically deformed in the middle of inserting the terminal fitting into the cavity Partially enlarged sectional view showing how the metal lance returns elastically in the middle of inserting the terminal fitting into the cavity Partially enlarged sectional view showing a state where the metal fitting has been elastically restored after the terminal fitting has been inserted into the cavity The partially expanded sectional view showing the state which insertion in the cavity of the terminal metal fitting in Embodiment 2 completed, and the metal lance returned elastically Partially enlarged perspective view showing a metal lance The partially expanded perspective view showing the metal lance concerning other embodiment (3)

<Embodiment 1>
Hereinafter, Embodiment 1 which actualized this invention is demonstrated in detail, referring FIGS. 1-13.
In the present embodiment, the terminal metal fitting 40 is accommodated in the cavity 11 of the resin part, and the metal lance 41 and the resin part are engaged with each other so that the metal lance 41 formed on the terminal metal fitting 40 is engaged with the wall surface of the cavity 11. The case where the resin component is the valve socket 10 will be described.

  The bulb socket 10 is mounted with a wedge-based bulb (bulb) (not shown), and is used by being attached to a mounting hole of a panel (not shown). The valve socket 10 is made of synthetic resin, and has a valve mounting portion 12 to which a valve is mounted and a connector fitting portion 13 to which a power supply side connector (not shown) is fitted. Hereinafter, in each component, the valve mounting portion 12 side (upper side in FIG. 1) is described as the upper side, and the connector fitting portion 13 side (lower side in FIG. 1) is described as the lower side.

  The valve mounting portion 12 has a cylindrical shape that opens upward, and the valve can be mounted from above. As shown in FIG. 2, the sectional shape of the valve mounting portion 12 is a rectangular shape that is long in one direction as a whole, and a pair of wall portions (referred to as a front wall portion 14 and a back wall portion 15) having a large width dimension, It has a pair of side wall part 16 with a small width dimension.

  The connector fitting portion 13 has a cylindrical shape that opens downward, and the power supply side connector can be fitted from below. As shown in FIG. 3, the cross-sectional shape of the connector fitting portion 13 has a rectangular shape that is slightly longer in one direction as a whole.

An attachment fitting portion 17 that fits into the attachment hole of the panel is provided in the intermediate portion of the valve socket 10 (see FIGS. 1 and 2). The attachment fitting portion 17 has a substantially circular cross section that matches the shape of the attachment hole, and a flange portion 18 and an engagement portion 19 that sandwich the peripheral edge portion of the attachment hole are provided on the outer peripheral surface thereof.
The flange portion 18 is provided at the lower end of the attachment fitting portion 17 and has a form protruding outward from the entire circumference of the attachment fitting portion 17, and the outer shape thereof is a substantially circular shape that is slightly larger than the attachment hole. There is no.

  The engaging portion 19 is provided above the flange portion 18. The engaging portions 19 are intermittently provided on the four sides of the attachment fitting portion 17 and have different width dimensions (length dimensions in the direction along the circumferential direction of the attachment fitting portion 17). Of the four engaging parts 19, the engaging part 19 having the largest width dimension (referred to as the first engaging part 19A) and the engaging part 19 having the next largest width dimension (referred to as the second engaging part 19B) Are arranged at positions facing each other, and an engagement portion 19 (referred to as a third engagement portion 19C) having the next largest width dimension is a timepiece of the second engagement portion 19B when the valve socket 10 is viewed from above. An engaging portion 19 (referred to as a fourth engaging portion 19D) having a smallest width dimension, which is disposed at a position adjacent to the periphery, is disposed to face the third engaging portion 19C. The first engaging portion 19A and the second engaging portion 19B are disposed at both ends of the valve mounting portion 12 and the connector fitting portion 13 in the short direction. A guide surface 21 is formed at a corner portion on one end side in the longitudinal direction of each engaging portion 19 so as to be inclined in a direction away from the flange portion 18 toward the front in the rotation direction at the time of attachment. A projecting piece 22 projects downward from the longitudinal end of the first engaging portion 19A.

  The terminal fitting 40 electrically connects the bulb and the power supply side connector, and is formed into a predetermined shape by punching a conductive metal plate into a developed shape and sequentially bending it. . The terminal fitting 40 has a main body portion 42, a connection portion (referred to as a connection piece 43) connected to the valve side, and a connection portion (referred to as a male tab 44) connected to a power supply side connector.

  The main body 42 is bent into a substantially U-shape as a whole, and is disposed at the outer plate 45 disposed along the front wall portion 14 or the rear wall portion 15 of the valve mounting portion 12 and the central portion of the valve mounting portion 12. It has the inner side board 46 and the intermediate | middle board 47 distribute | arranged along the side wall part 16 of the valve | bulb mounting part 12 (refer FIG. 6). The intermediate plate 47 is bent in a substantially vertical direction from the edge of the outer plate 45, and the inner plate 46 is bent in a substantially vertical direction from the edge of the intermediate plate 47 in a direction facing the outer plate 45 (see FIG. 10). ). The outer plate 45 and the inner plate 46 are substantially parallel. Further, a notch 48 is formed at the upper corner of the inner plate 46 at the end opposite to the intermediate plate 47 (see FIG. 9).

  The outer plate 45 has a substantially square shape as a whole, and has a larger area than the intermediate plate 47 and the inner plate 46. The intermediate plate 47 and the inner plate 46 as a whole have a rectangular shape that is long in the vertical direction, and the vertical dimension thereof is smaller than the vertical dimension of the outer plate 45.

  The lower end edge of the main body 42 is horizontal, that is, the lower end edges of the outer plate 45, the intermediate plate 47, and the inner plate 46 are aligned horizontally in the vertical direction. When the terminal fitting 40 is accommodated in the cavity 11 of the valve mounting portion 12, the lower end edge of the main body portion 42 abuts against an abutting portion 24 of the cavity 11 described later, and restricts the downward displacement of the terminal fitting 40. .

  A flat male tab 44 projects from the lower end of the main body 42. The male tab 44 is disposed so as to protrude into the connector fitting portion 13 so that the power feeding terminal of the power feeding connector can be conductively connected. The male tab 44 is provided at the lower end of the inner plate 46 of the main body 42 and has a plate surface flush with the inner plate 46. The male tab 44 extends linearly along the edge of the inner plate 46. The male tab 44 has a width dimension equivalent to the width dimension of the notch 48 formed in the inner plate 46. The male tabs 44 are formed by stacking plate materials, and almost half of the male tabs 44 are formed by overlapping end edges extending to the inner plate 46.

  A pair of connection pieces 43 protrude from the upper end of the main body 42. The pair of connection pieces 43 are provided side by side with the outer plate 45 of the main body 42, rise upward from the upper end of the outer plate 45, and have a plate surface that is flush with the outer plate 45.

Of the pair of connection pieces 43, the connection piece 43 provided on the intermediate plate 47 side (referred to as the first connection piece 43A) is made smaller in width than the other connection piece (referred to as the second connection piece 43B). Yes.
The first connecting piece 43A is bent approximately half in the length direction from the tip to the inside, and the bent portion (referred to as a bent portion 49) can be elastically displaced in the inner and outer directions. The lower end portion of the bent portion 49 is provided with a first contact portion 51 that protrudes further inward and comes into contact with the electrode portion of the bulb.

  Most of the second connection piece 43B is configured to rise obliquely inward. A second contact portion 52 that protrudes further inward and contacts the electrode portion of the bulb is provided at the tip of the second connection piece 43B. The first contact portion 51 and the second contact portion 52 have substantially the same position in the inner and outer directions.

  An engagement piece 53 that is inserted into an engagement groove 28 to be described later when the terminal fitting 40 is accommodated in the cavity 11 is provided in a portion extending from the root portion of the first connection piece 43A to the upper end portion of the outer plate 45. (See FIGS. 6 and 9). The engagement piece 53 protrudes laterally from the positions of the intermediate plate 47 and the first connection piece 43A.

  Metal lances 41 are respectively formed on the outer plate 45 and the inner plate 46 of the main body 42 (see FIGS. 8 and 9). The metal lance 41 formed on the outer plate 45 is referred to as an outer metal lance 41A, and the metal lance 41 formed on the inner plate 46 is referred to as an inner metal lance 41B. The outer metal lance 41 </ b> A and the inner metal lance 41 </ b> B are formed by cutting and raising a part of the main body portion 42, and gradually move sideward from the lower side (the tip side in the insertion direction to the cavity 11) toward the upper side (the rear side). It has a cantilever shape that protrudes. The inner metal lance 41B can be elastically deformed in the plate thickness direction of the inner plate 46, and the outer metal lance 41A can be elastically deformed in the plate thickness direction of the outer plate 45. Both metal lances 41A and 41B are substantially rectangular and have a shape that becomes slightly narrower upward. Both metal lances 41A and 41B have substantially the same shape and the same size. The tips (free ends) of the metal lances 41A and 41B are locked to locking surfaces (the outer locking surface 29 and the inner locking surface 31), which will be described later. Is retained.

  The outer metal lance 41 </ b> A is formed at a lower position within the width of the second connection piece 43 </ b> B, in other words, at a position slightly closer to the opposite side of the intermediate plate 47 than the center in the width direction of the outer plate 45. The outer metal lance 41A is located approximately in the middle of the outer plate 45 in the vertical direction.

  The inner metal lance 41 </ b> B is formed in a substantially half region of the inner plate 46 near the intermediate plate 47, and is shifted from the male tab 44 in the width direction. The inner metal lance 41B is positioned approximately in the middle of the inner plate 46 in the vertical direction, and is slightly below the outer metal lance 41A, specifically, approximately half the vertical dimension of the outer metal lance 41A. Is located.

  In the valve mounting part 12, the cavities 11 in which the terminal fittings 40 are accommodated are formed one by one on the one end side and the other end side in the short direction of the valve mounting part 12 (see FIG. 2). Each cavity 11 has an outer accommodating portion 11A for accommodating the outer plate 45 of the terminal fitting 40, an intermediate accommodating portion 11B for accommodating the intermediate plate 47, and an inner accommodating portion 11C for accommodating the inner plate 46. . The wall surface of the outer housing portion 11A is along the plate surface of the outer plate 45, the wall surface of the inner housing portion 11C is along the plate surface of the inner plate 46, and the wall surface of the intermediate housing portion 11B is along the plate surface of the intermediate plate 47. A guide surface 25 is formed on the upper edge of each of the accommodating portions 11A, 11B, and 11C, which serves as the inlet of the main body 42, and has an inclination that widens the width of the inlet.

Each cavity 11 is provided with an abutting portion 24 against which the lower end edge of the main body portion 42 of the terminal fitting 40 abuts (see FIG. 7). The abutting portion 24 is provided in the outer accommodating portion 11A and the intermediate accommodating portion 11B, and the lower end edges of the outer plate 45 and the intermediate plate 47 abut each other.
A tab insertion hole 26 through which the male tab 44 is inserted is provided in the inner housing portion 11C so as to penetrate in the vertical direction. The tab insertion hole 26 is located substantially at the center of the valve mounting portion 12.

  The outer accommodating portion 11 </ b> A is formed along the front wall portion 14 and the rear wall portion 15 of the valve mounting portion 12. A pair of slits 27 is formed in the front wall portion 14 and the back wall portion 15. The slit 27 extends straight downward from the upper ends of the front wall portion 14 and the back wall portion 15 and is formed in a portion of the valve mounting portion 12 above the mounting fitting portion 17 (see FIG. 1). . The slit 27 is inserted in an oblique direction with respect to the wall thickness direction.

Engaging grooves 28 into which the engaging pieces 53 and the side edges of the outer plate 45 (side edges opposite to the engaging pieces 53) are inserted are formed on both sides of the outer housing portion 11A in the width direction. .
An outer locking surface 29 for locking the outer metal lance 41A is formed on the wall surface of the outer housing portion 11A. The outer locking surface 29 is the upper surface of the peripheral surface of the window portion 23 penetrating inward and outward from the inner peripheral surface of the front wall portion 14 or the rear wall portion 15 to the outer surface of the attachment fitting portion 17. The window portion 23 has a rectangular shape that is long in the vertical direction, and is provided below the first engagement portion 19 </ b> A and the second engagement portion 19 </ b> B provided in the attachment fitting portion 17.

The intermediate housing portion 11B is formed along the side wall portion 16 of the valve mounting portion 12.
The inner accommodating portion 11 </ b> C is formed side by side in the central portion of the valve mounting portion 12. An inner locking surface 31 with which the inner metal lance 41B is locked is formed on the wall surface of the inner housing portion 11C. The inner locking surface 31 is formed at a position shifted to the side of the tab insertion hole 26 (longitudinal direction of the valve mounting portion 12). The inner locking surface 31 is a horizontal surface extending in a direction substantially perpendicular to the direction in which the terminal fitting 40 is removed from the cavity 11 (see FIG. 7). The inner locking surface 31 is formed on the outer wall surface (the opposite side to the outer housing portion 11A) of the inner housing portion 11C. The inner locking surface 31 is formed in a direction to increase the width dimension of the inner housing portion 11 </ b> C, and is a space below the inner locking surface 31. Of the wall surface of the inner accommodating portion 11C, the portion above the inner locking surface 31 is a contacted portion 32 with which the inner metal lance 41B is elastically contacted in the middle of inserting the terminal fitting 40 into the cavity 11. is there. The contacted part 32 is a vertical surface.
A portion following the inner locking surface 31 from the contacted portion 32 is a chamfered portion 33 having a chamfered shape. The chamfered portion 33 is rounded by being rounded.

  Of the wall surface of the cavity 11, a part extending from the contacted portion 32 to the inner locking surface 31 is formed by a single mold pin 60 (see FIG. 5). Specifically, the lower mold 61 that molds the valve socket 10 has a single mold pin 60 that protrudes upward. The mold pin 60 has a height dimension that protrudes to the lower end of the guide surface 25. The mold pin 60 has a molding surface for molding the inner locking surface 31, the chamfered portion 33, the contacted portion 32, and the opposite wall surface on the opposite side. The upper mold 62 is in contact with the tip of the mold pin 60.

  Then, when the upper mold 62 and the lower mold 61 are closed and molten resin is injected from a gate (not shown), the molding space between the upper mold 62 and the lower mold 61 is filled with the resin. After the molten resin is solidified, when the upper mold 62 and the lower mold 61 are separated, a portion between the inner locking surface 31 and the chamfered portion 33 and a wall surface facing the contacted portion 32; One die-cutting hole 34 is formed in a portion that becomes the tab insertion hole 26. When the valve socket 10 is viewed from below as shown in FIG. 3, the die-cutting hole 34 has a horizontally long rectangular shape, and a central portion thereof is a tab insertion hole 26. In addition, the length dimension of the die-cutting hole 34 is a dimension equivalent to the width dimension of the inner side plate 46 of the terminal fitting 40.

Next, the insertion operation of the terminal fitting 40 will be described.
When the terminal fitting 40 is inserted into the cavity 11 from above, the side edge portion of the outer plate 45 is inserted into the engaging groove 28, the male tab 44 is inserted into the tab insertion hole 26, and the outer metal lance 41A is inserted into the outer housing portion. It is elastically deformed in contact with the wall surface of 11A. Further, when the terminal fitting 40 is pushed downward, the inner plate 46 is inserted into the inner housing portion 11C, and the inner metal lance 41B comes into contact with the contacted portion 32 of the inner housing portion 11C and is elastically deformed (see FIG. 11). Then, when the terminal fitting 40 is pushed further downward while the inner metal lance 41B and the outer metal lance 41A are elastically deformed, the lower end edge of the main body portion 42 abuts against the abutting portion 24, and at the same time, both the metal lances 41A, 41B. Returns elastically. At the time of this elastic return, the tip of the inner metal lance 41B passes through the space formed by forming the chamfered portion 33 (see FIG. 12). Here, when the chamfered portion 33 is not formed, a corner portion where the locking surface and the contacted portion intersect is formed in this space, so that the tip of the inner metal lance 41B is the corner portion. There is a risk of scraping the resin. However, in this embodiment, when the chamfered portion 33 is formed and the inner metal lance 41B is elastically restored, a space is formed on the path through which the tip passes, so the resin is shaved as described above. Can be prevented. And the front-end | tip of the inner metal lance 41B which elastically returned is located under the inner side latching surface 31, and latches to the inner side latching surface 31 (refer FIG. 13). At this time, the front end of the inner metal lance 41B is positioned on the inner end side of the inner locking surface 31, and between the front end of the inner metal lance 41B and the chamfered portion 33, approximately half of the inner locking surface 31 exists. is doing. Further, the tip of the outer metal lance 41A is locked to the outer locking surface 29, and the terminal fitting 40 is housed in each cavity 11 of the valve socket 10 and is prevented from coming off. Thereafter, when the valve is held by the valve mounting portion 12 and the power supply side connector is fitted to the connector fitting portion 13, the power source and the valve are electrically connected via the terminal fitting 40.

  As described above, according to the first embodiment, in the middle of inserting the terminal fitting 40 into the cavity 11 among the wall surfaces of the cavity 11, the inner metal lance 41 </ b> B is elastically contacted from the contacted portion 32. A portion extending from the stop surface 31 is formed by one mold pin 60, and a portion continuing from the contacted portion 32 to the inner locking surface 31 is a chamfered portion 33 having a chamfered shape. Therefore, when the inner metal lance 41B is elastically restored, the tip of the inner metal lance 41B is difficult to come into contact with the corner portion that continues from the contacted portion 32 to the inner locking surface 31, thereby preventing the tip from scraping the resin. can do. In addition, conventionally, in order to ensure a track when the inner metal lance is elastically restored, the formation position of the inner locking surface is more than the position of the tip of the inner metal lance when the terminal fitting is accommodated in a predetermined position. The position needs to be separated from the upper side (the front side in the insertion direction of the terminal fitting 40). However, according to the present embodiment, since the portion following the inner locking surface 31 from the contacted portion 32 is the chamfered portion 33, the position where the inner locking surface 31 is formed is lower than the conventional (in the insertion direction). Back side). Therefore, the distance between the inner locking surface 31 and the tip of the inner metal lance 41B can be reduced, and the backlash of the terminal fitting 40 can be reduced. Further, a portion extending from the contacted portion 32 to the inner locking surface 31 is formed by a single mold pin 60. Here, for example, a mold pin (referred to as a first mold pin) that forms a chamfered portion and an inner locking surface and a mold pin (referred to as a second mold pin) that forms a contacted portion are provided separately. When the chamfered part, the inner locking surface and the contacted part are formed by abutting these mold pins, the tip of the first mold pin has a pointed shape, ensuring sufficient strength to withstand mass production. Difficult to do. However, according to the configuration of the present embodiment, the tip of the mold pin 60 does not have a pointed shape, so that it is possible to easily ensure a strength that can withstand mass production.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS. 14 and 15.
In this embodiment, the metal lance 70 protrudes little by little from the front end side in the insertion direction to the cavity 11 toward the rear side, and an engaging portion (front end portion) 71 that engages with the engaging surface 31 is provided. The embodiment is different from the first embodiment in that it is bent inward. In the present embodiment, as in the first embodiment, the case where the resin component is the valve socket 10 will be described, and the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted. .

  As in the first embodiment, the terminal fitting 40 of the present embodiment includes a main body portion 42, a connection piece 43 connected to the valve side, and a male tab 44 connected to a power supply side connector. Metal lances are formed on the inner plate 45 and the inner plate 46, respectively. Here, the case where this invention is applied to the metal lance 70 formed in the inner side board 46 is demonstrated.

  Similarly to the first embodiment, the valve socket 10 is mounted with a wedge-based valve (bulb) (not shown), and a valve mounting portion 12 to which the valve is mounted and a power-side connector (not shown) are fitted. The valve fitting portion 12 is provided with a cavity 11 in which the terminal fitting 40 is accommodated. As in the first embodiment, the cavity 11 includes an outer housing portion 11A for housing the outer plate 45 of the terminal fitting 40, an intermediate housing portion 11B for housing the intermediate plate 47, and an inner housing portion 11C for housing the inner plate 46. A locking surface 31 that locks the metal lance 70 is formed on the wall surface of the inner housing portion 11C. The locking surface 31 is a horizontal surface that extends in a direction substantially perpendicular to the direction in which the terminal fitting 40 is removed from the cavity 11, as in the first embodiment, and from the locking surface 31 among the wall surfaces of the inner housing portion 11 </ b> C. The upper portion is the contacted portion 32 with which the metal lance 70 is elastically contacted in the middle of inserting the terminal fitting 40 into the cavity 11. In addition, the part following the latching surface 31 from the to-be-contacted part 32 is made into the corner | angular part which makes a substantially right angle like the conventional valve socket.

  The metal lance 70 is formed by cutting and raising a part of the main body portion 42 and bending it into a predetermined shape. The metal lance 70 has a cantilever shape as in the first embodiment, and can be elastically deformed in the thickness direction of the inner plate 46. . The metal lance 70 has a protruding portion 73 that protrudes outward little by little from the lower side to the upper side, and a locking portion 71 that is bent inward from the protruding portion 73. The locking portion 71 is bent at an angle along the locking surface 31 (substantially parallel) in a state where the housing of the terminal fitting 40 in the cavity 11 is completed and the metal lance 70 is elastically restored. Since the locking portion 71 is bent inward in this way, the protruding end portion 72 (the corner portion between the protruding portion 73 and the locking portion 71) of the metal lance 70 is rounded into an R shape. The locking portion 71 and the protruding portion 73 form an acute angle.

Next, the insertion operation of the terminal fitting 40 will be described.
When the terminal fitting 40 is inserted into the cavity 11 from above, as in the first embodiment, the inner plate 46 is inserted into the inner housing portion 11C, and the metal lance 70 contacts the contacted portion 32 of the inner housing portion 11C and is elastic. Deform. Then, when the terminal fitting 40 is pushed further downward while the metal lance 70 is elastically deformed, the lower end edge of the main body portion 42 abuts against the abutting portion 24 and at the same time, the metal lance 70 is elastically restored. At the time of this elastic return, the protruding end portion 72 of the R-shaped metal lance 70 slides at a corner where the locking surface 31 and the contacted portion 32 intersect. The locking portion 71 of the metal lance 70 that has returned to elasticity is positioned below the locking surface 31 and is locked to the locking surface 31. At this time, the entire locking portion 71 is arranged to face the locking surface 31, and the protruding end 72 of the metal lance 70 is located on the back end side of the locking surface 31. Thus, the terminal fitting 40 is accommodated in the cavity 11 of the valve socket 10 and is prevented from coming off.

  As described above, in the present embodiment, the metal lance 70 protrudes little by little from the front end side in the insertion direction to the cavity 11 toward the rear side, and also engages with the engaging surface 31. Since the protruding end portion 72 of the metal lance 70 slips when the metal lance 70 is elastically restored, it is possible to prevent the resin from being scraped.

Further, since the locking portion 71 of the metal lance 70 is bent at an angle along the locking surface 31, it is wider than the tip of the metal lance 70 when a force in the pulling direction acts on the terminal fitting 40. Since the portion comes into contact with the locking surface 31, it is possible to prevent the resin from being shaved.
Thus, since the corner portion of the locking surface 31 can be prevented from being scraped by the metal lance 70, it is possible to prevent the locking force of the locking surface 31 from being reduced and the locking force from being reduced.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

(1) In the above embodiment, the case where the resin component is the valve socket 10 has been described. However, the present invention is not limited to this. For example, the resin component accommodates the terminal fitting in the cavity and the metal lance formed on the terminal fitting, Any component may be used as long as it has a structure to be locked to the wall surface of the cavity, for example, a connector housing or the like.
(2) In the first embodiment, the chamfered portion 33 is an R chamfer. However, the present invention is not limited to this. For example, the chamfered portion may have a corner portion cut off obliquely, or may be a so-called C chamfer.

(3) In the second embodiment, the metal lance 70 is formed by cutting and raising a part of the main body portion 42. However, the present invention is not limited to this. For example, as shown in FIG. May be formed by bending and punching the inner portion thereof (punching). In such a case, compared with the case where the metal lance 70 is formed by cutting and raising, the opening area of the main body portion 42 becomes larger, but the entire metal lance 70 including its root portion is easily elastically deformed.
(4) In the second embodiment, the locking portion 71 is bent at an angle substantially parallel to the locking surface 31 in a state where the metal lance 70 is elastically restored, and a force in the pulling direction acts on the terminal fitting 40. In this case, the entire locking portion 71 is in contact with the locking surface 31, but the present invention is not limited to this. For example, when the metal lance is elastically restored, the locking portion is in contact with the locking surface. When the terminal fitting is inclined and pulled in the pulling direction, the locking portion may be elastically deformed by contact with the locking surface, and the whole may be pressed against the locking surface.

10 ... Valve socket (resin parts)
11 ... Cavity 31 ... Inner locking surface (locking surface)
32 ... Contacted part 33 ... Chamfered part 40 ... Terminal fitting 41B ... Inner metal lance (metal lance)
44 ... Male tab 46 ... Inner plate (part having a plate surface on the same plane as the male tab)
60 ... Mold pin 70 ... Metal lance 71 ... Locking part (tip)

Claims (6)

A terminal fitting is accommodated in a cavity of a resin part, and the metal lance formed on the terminal fitting is locked to a wall surface of the cavity and a resin part,
The metal lance is configured to gradually protrude outward from the front end side in the insertion direction to the cavity toward the rear side,
On the wall surface of the cavity, a locking surface that extends in a direction substantially perpendicular to the direction in which the terminal fitting is removed from the cavity is formed, and the tip of the metal lance is locked to the locking surface. And
Of the wall surface of the cavity, a portion extending from the contacted portion to which the metal lance elastically contacts in the middle of inserting the terminal fitting into the cavity to the locking surface is formed by one mold pin. ,
A locking structure between a metal lance and a resin component, wherein a portion following the locking surface from the contacted portion is a chamfered portion having a chamfered shape.   The locking structure between the metal lance and the resin component according to claim 1, wherein the chamfered portion is a curved surface. A terminal fitting is accommodated in a cavity of a resin part, and the metal lance formed on the terminal fitting is locked to a wall surface of the cavity and a resin part,
On the wall surface of the cavity, a locking surface is formed that extends in a direction substantially perpendicular to the direction in which the terminal fitting is removed from the cavity.
The metal lance protrudes outward little by little from the front end side in the insertion direction to the cavity toward the rear side, and the front end portion that engages with the engagement surface is bent inward. Locking structure between resin and resin parts.   The said metal lance is the latching structure of the metal lance and resin component of Claim 3 in which the said front-end | tip part is bent at the angle which follows the said locking surface. The resin component is a valve socket to which a valve is attached,
The said terminal metal fitting electrically connects between the said valve | bulb and a power supply side connector, The latching structure of the metal lance and resin component as described in any one of Claim 1 thru | or 4. The terminal fitting has a male tab connected to the power supply side connector,
The locking structure between the metal lance and the resin component according to claim 5, wherein the metal lance is formed on a portion of the terminal fitting having a plate surface on the same plane as the male tab.

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