JP2008226484A - Bulb socket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an elastic holding piece from being illegally deformed inside. <P>SOLUTION: A terminal metal fitting 20 is formed with the elastic holding piece 22 regulating separation from a fitting part 11 of a base part 41 by locking on the base part 41 inserted into the fitting part 11, and the elastic holding piece 22 is formed with a locking part 29 capable of regulating deformation in the direction separating from a peripheral wall of the elastic holding piece 22 by locking on the peripheral wall (a front face wall 13F or a rear face wall 13R) constituting the fitting part 11. Since the locking part 29 extended from the elastic holding piece 22 is locked on the peripheral wall, the elastic holding piece 22 is not illegally deformed inside to separate from the peripheral wall. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a valve socket.

Conventionally, what was described in patent document 1 as a valve socket is known. In this valve socket, a terminal fitting is provided in a fitting portion having a rectangular tube shape for inserting a base portion of a wedge base valve. When the base portion is inserted in the fitting portion, the terminal fitting is provided. The elastic holding piece formed on the base is locked to the retaining protrusion of the base portion, and the base portion is retained in the retaining state by this locking action.
JP 2003-31328 A

In the above valve socket, since the elastic holding piece is exposed in the opening of the fitting portion, the tip of the base portion cuts into the gap between the peripheral wall constituting the fitting portion and the elastic holding piece, There is a concern that the elastic holding piece may be illegally deformed inward so as to be separated from the peripheral wall of the fitting portion.
The present invention has been completed based on the above circumstances, and an object thereof is to prevent the elastic holding piece from being illegally deformed inward.

  As means for achieving the above object, the invention of claim 1 is accommodated in a fitting portion having a substantially rectangular tube shape for inserting a base portion of a wedge base valve, and inside the fitting portion. The terminal fitting is formed with an elastic holding piece that is engaged with the base portion inserted into the fitting portion to restrict detachment of the base portion from the fitting portion. In this case, the elastic holding piece extends from the elastic holding piece to a peripheral wall that constitutes the fitting portion, so that the elastic holding piece can restrict deformation of the elastic holding piece in a direction away from the peripheral wall. It is characterized by where it is put out.

  The invention of claim 2 is characterized in that, in the invention of claim 1, the locking portion is disposed closer to the opening end side of the fitting portion than the elastic holding piece.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the locking portion is inclined with respect to the insertion direction of the base portion with respect to the fitting portion, and is separated from the peripheral wall. It is characterized in that an inclined portion that is inclined toward the depth of the fitting portion is formed.

  According to a fourth aspect of the present invention, in the apparatus according to any one of the first to third aspects, a part of the peripheral wall is a bending portion that can be elastically bent toward the outer surface side. A contact piece that can contact the inner surface of the bending portion is formed, and when the base portion elastically bends the elastic holding piece in the process of inserting the base portion into the fitting portion, The contact piece is in contact with the bent portion, so that the bent portion is integrated with the elastic holding piece and is elastically displaced outward.

<Invention of Claim 1>
Since the locking portion extended from the elastic holding piece is locked to the peripheral wall, the elastic holding piece is not deformed inward so as to be separated from the peripheral wall.

<Invention of Claim 2>
Even if the base portion tries to interrupt between the elastic holding piece and the peripheral wall, interruption is prevented by the locking portion before the base portion reaches the elastic holding piece.

<Invention of Claim 3>
Since the base part which contact | abutted to the latching | locking part is induced | guided | derived to the direction spaced apart from a surrounding wall by the inclination of an inclination part, it can approach into the back of a fitting part, without being caught by a latching | locking part.

<Invention of Claim 4>
When a force in the detaching direction is applied to the base portion inserted in the fitting portion, the base portion tries to push the elastic holding piece outward, but at this time, the contact piece comes into contact with the bending portion. As a result, the pressing force applied to the elastic holding piece from the base portion side is received by a strong elastic holding force that combines the elastic holding force of the elastic holding piece and the elastic holding force of the bending portion. The elastic bending of the base portion is restricted, and the base portion is prevented from being detached.

<Embodiment 1>
A first embodiment of the present invention will be described below with reference to FIGS. The valve socket 10 of the present embodiment is made of synthetic resin, and the substantially upper half region thereof is a fitting portion 11 having a substantially rectangular tube shape that is open on the upper surface side, and is substantially in the lower half. The region is a hood portion 12 for fitting a connector (not shown). Of the four peripheral walls constituting the fitting portion 11, the front wall 13F and the rear wall 13R are respectively formed with a pair of left and right slits 14 extending downward from the upper edge of the front wall 13F, and the front wall 13F and the rear wall 13R. Of these, the region sandwiched between the pair of slits 14 is a bent portion 15 having a rectangular plate shape extending upward in a cantilevered manner. The bending portion 15 can be elastically bent outward from the fitting portion 11. The surface facing the slit 14 in the front wall 13F and the rear wall 13R is a receiving surface 16 that is inclined with respect to the bending direction of the bending portion 15, and the surface facing the slit 14 in the bending portion 15 is the receiving surface 16. The contact surface 17 is substantially parallel, and when a bending force is applied to the bending portion 15 toward the inside of the fitting portion 11, the bending surface 15 is slightly bent (approximately the same size as the plate thickness of the bending portion 15). The abutment surface 17 abuts on the receiving surface 16, and further elastic deformation to the inside of the bending portion 15 is regulated by this abutting action. Further, a cutout portion 18 is formed at the upper end edge of the bending portion 15 in a form in which a substantially half region is cut out in a stepped shape.

  A pair of terminal fittings 20 is accommodated in the valve socket 10. The terminal fitting 20 includes a tab 21 protruding downward in the hood portion 12, an elastic holding piece 22 accommodated in the fitting portion 11, and an elastic contact piece 23 also accommodated in the fitting portion 11. Configured.

Next, the detailed shape of the elastic holding piece 22 will be described.
The elastic holding piece 22 is configured to extend further upward from the extending end of the support portion 24 that extends horizontally from the upper end of the tab 21, and the rising portion 25 rising from the support portion 24 and the upper end of the rising portion 25. A folded portion 26 extending upward while curving so as to swell in a substantially semicircular arc shape from the (rising end), a slope portion 27 extending obliquely upward from the upper end of the folded portion 26, and a slope portion 27 and an abutting piece 28 that extends horizontally in a cantilevered manner outward from the extending end. The contact piece 28 is positioned below the notch 18 at the upper end edge of the bent portion 15, and when the bent portion 15 and the elastic holding piece 22 are in a free state in which neither elastic deformation is caused, the contact piece 28 extends. A slight gap in the horizontal direction between the protruding end and the inner surface of the bent portion 15 (when the elastic holding piece 22 is elastically deformed by the base portion 41 in the process of inserting the base portion 41 into the fitting portion 11). (Dimension smaller than the horizontal deflection dimension). The rising portion 25 and the folded portion 26 have substantially the same width dimension, the slope portion 27 is wider than the folded portion 26, and one side edge portion of the slope portion 27 is larger than the side edge of the folded portion 26. A projecting end portion 27a projecting sideways is formed. Further, the abutting piece 28 is narrower than the inclined surface portion 27, and the protruding end portion 27 a of the inclined surface portion 27 protrudes laterally from the side edge of the abutting piece 28.

  A locking portion 29 extends from the elastic holding piece 22. The locking part 29 is a form that extends obliquely upward as a whole from the projecting end part 27a of the slope part 27 to the outside (flexible part 15 side), as shown in FIGS. A projecting portion 30 that slightly projects substantially horizontally from the outer edge of the projecting end portion 27a of the slope portion 27, an inclined portion 31 that extends obliquely upward from the end edge of the projecting portion 30, and an inclined portion. The horizontal portion 32 extends horizontally outward from the extended end of 31, and the hook portion 33 extends substantially perpendicularly downward from the extended end of the horizontal portion 32. In a state where both the elastic holding piece 22 and the bent portion 15 are not elastically deformed, the upper surface of the horizontal portion 32 is the same height as the upper edge of the bent portion 15 where the notch portion 18 is not formed. The horizontal part 32 has a form straddling the upper part of the formation part of the notch part 18 in the bending part 15. Further, the hooking portion 33 is located outside the bending portion 15, and the lower end of the hooking portion 33 is set to a position lower than the upper end edge of the notch portion 18.

  On the other hand, the wedge base valve 40 assembled to the valve socket 10 includes a glass base portion 41 having a rectangular plate shape and a glass valve portion 42 connected to the upper end edge of the base portion 41. A pair of terminal portions 43 extending from a filament (not shown) accommodated in the valve portion 42 penetrates the inside of the base portion 41 downward, is led out of the base portion 41 from its lower end surface, and upwards. It is folded and arranged so as to be along the front and back outer surfaces of the base portion 41. On both the front and back surfaces of the base portion 41, retaining protrusions 44 that protrude in a substantially right triangle shape are formed. The base portion 41 is inserted and accommodated in the fitting portion 11 from above, and in this state, the elastic contact piece 23 is in elastic contact with each terminal portion 43 so as to be conductive, and is elastically held by the retaining protrusion 44. When the folded portion 26 of the piece 22 is locked, the separation of the base portion 41 from the fitting portion 11 is restricted.

Next, the operation of this embodiment will be described.
When the wedge base valve 40 is assembled to the valve socket 10, the base portion 41 is inserted into the fitting portion 11 from above and is inserted between the pair of terminal fittings 20. In the process of inserting the base portion 41, the retaining protrusion 44 interferes with the folded portion 26, so that the elastic holding piece 22 and the locking portion 29 are integrally bent outward (in the direction approaching the bending portion 15). To do. At this time, when the elastic holding piece 22 is slightly moved outward, the abutting piece 28 abuts against the inner surface of the bending portion 15, and thereafter, the elastic holding piece 22, the locking portion 29, and the bending portion 15 are integrated. And elastically bends outward. And when the base part 41 is assembled | attached deeply to a regular assembly position, since the securing protrusion 44 will finish passing the folding | returning part 26, the elastic holding piece 22, the latching | locking part 29, and the bending part 15 will be in original position all at once. Return to elasticity. Then, when the folded portion 26 is engaged with the retaining protrusion 44 from above, the base portion 41 is prevented from being detached upward from the fitting portion 11, and the wedge base valve 40 is connected to the valve socket 10. The assembled state is maintained (see FIG. 6). Further, when the elastic contact piece 23 abuts on the terminal portion 43, the terminal fitting 20 and the wedge base valve 40 are connected so as to be conductive.

  Now, since the wedge base valve 40 is manually attached to the valve socket 10, the base portion 41 is not properly inserted into the fitting portion 11, and the insertion position of the base portion 41 with respect to the fitting portion 11 is less than the normal position. May also be biased toward the bent portion 15 side. In this case, the lower end edge of the base portion 41 interrupts between the bending portion 15 and the elastic holding piece 22, and as a result, the elastic holding piece 22 is bent inward so as to be separated from the bending portion 15, that is, in an incorrect direction. There is a concern that it will be done.

  Therefore, in this embodiment, the locking portion 29 is provided on the elastic holding piece 22 as a countermeasure. The lower end edge of the base portion 41 that is biased and inserted toward the bent portion 15 by the engaging portion 29 contacts the inclined portion 31 or the horizontal portion 32 of the engaging portion 29 before contacting the elastic holding piece 22. The inclined portion 31 and the horizontal portion 32 are pressed downward in contact with each other. At this time, since the horizontal portion 32 comes into contact with the upper end edge of the cutout portion 18 of the bending portion 15, further pressing down by the base portion 41 is restricted.

At this time, even if the base portion 41 comes into contact with the horizontal portion 32 and tries to push the locking portion 29 horizontally inward, the hooking portion 33 is locked to the bending portion 15 when it moves slightly (see FIG. 4). Thereafter, the locking portion 29 and the bending portion 15 are integrally displaced inward while elastically bending the bending portion 15. When the bending amount of the bending portion 15 becomes a certain amount or more, the abutment surface 17 of the bending portion 15 abuts against the receiving surface 16 of the front wall 13F or the rear wall 13R, thereby restricting further elastic bending of the bending portion 15. Further, the latching portion 29 and the elastic holding piece 22 are also restricted from being further elastically bent inward.
When the lower end edge of the base portion 41 abuts on the inclined portion 31, the base portion 41 is guided to the inside away from the bent portion 15 due to the gradient of the inclined portion 31.

  Further, when a force in the direction of separating from the fitting portion 11 (upward) is applied to the base portion 41 that is correctly assembled to the fitting portion 11, the retaining projection 44 comes into contact with the folded portion 26. At this time, when the elastic holding piece 22 is slightly elastically bent outward, the contact piece 28 comes into contact with the bending portion 15. Accordingly, the pressing force applied to the elastic holding piece 22 from the base portion 41 side can be received by a strong elastic holding force that combines the elastic holding force of the elastic holding piece 22 and the elastic holding force of the bending portion 15. Therefore, the elastic holding piece 22 is restricted from being elastically bent outward, and the base portion 41 is prevented from being detached.

As described above, in the present embodiment, the engaging portion 29 extended from the elastic holding piece 22 is related to the peripheral wall (the bent portion 15 formed on the front wall 13F or the rear wall 13R) constituting the fitting portion 11. Since it was made to stop, the elastic holding | maintenance piece 22 does not deform | transform inward so that it may space apart from a surrounding wall (front wall 13F or rear surface wall 13R).
Moreover, since the latching | locking part 29 is arrange | positioned rather than the elastic holding piece 22 at the opening end side (above) of the fitting part 11, the base part 41 has the elastic holding piece 22 and a surrounding wall (front wall 13F or rear wall 13R). If the base portion 41 reaches the elastic holding piece 22, an interruption is prevented by the locking portion 29.
Further, the engaging portion 29 is inclined with respect to the insertion direction (downward direction) of the base portion 41 with respect to the fitting portion 11 and is further away from the peripheral wall (front wall 13F or rear wall 13R). Since the inclined portion 31 that is inclined toward the back (downward) is formed, the base portion 41 that is in contact with the locking portion 29 has a peripheral wall (front wall 13F or rear wall 13R) due to the inclination of the inclined portion 31. It is guided in the direction away from. As a result, the base portion 41 can enter the interior of the fitting portion 11 without being caught by the locking portion 29.

<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) A plurality of locking portions may be formed on one elastic holding piece.
(2) The locking portion may be locked not to the opening edge (upper edge) of the peripheral wall but to the hole edge of the window hole formed in the peripheral wall.
(3) In the above embodiment, the locking portion is arranged outside the locking region (folded portion) to the base portion in the width direction of the elastic holding piece. However, according to the present invention, in the width direction of the elastic holding piece. You may arrange | position a latching | locking part in the range of the latching area | region to a base part. In this case, the locking portion may be formed over the entire width of the elastic holding piece.
(4) The locking portion is not in a form inclined toward the opening edge (upper end edge) of the peripheral wall, but may have a substantially U shape that straddles the peripheral wall.
(5) The locking portion may be disposed on the back side (downward position) of the fitting portion with respect to the elastic holding piece.
(6) The inclined portion of the locking portion may be inclined so as to go toward the opening end (upward) of the fitting portion as it is separated from the peripheral wall.
(7) The locking portion may be in a form that does not have an inclined portion.
(8) The contact holding piece may not be formed on the terminal holding portion.
(9) In the above embodiment, the single valve type in which one terminal portion is disposed on each of the front and back surfaces of the base portion has been described. However, the present invention provides a terminal portion on each of the front and back surfaces of the base portion. It can also be applied to a double valve type wedge base valve in which two are arranged.

The front view of the valve socket of Embodiment 1 Plan view Cross section of valve socket Sectional drawing showing the state by which the latching | locking part latched to the bending part and the elastic bending to the inner side of the elastic holding piece was controlled Cross section of valve socket Sectional view with wedge base valve assembled Side view of terminal fitting Front view of terminal fitting Top view of terminal fitting Wedge base valve side view Front view of wedge base valve

Explanation of symbols

10 ... Valve socket 11 ... Fitting part 13F ... Front wall (peripheral wall)
13R ... Rear wall (surrounding wall)
DESCRIPTION OF SYMBOLS 15 ... Deflection part 20 ... Terminal metal fitting 22 ... Elastic holding piece 28 ... Contact piece 29 ... Locking part 31 ... Inclination part 40 ... Wedge base valve 41 ... Base part

Claims (4)

A fitting portion having a substantially rectangular tube shape for inserting the base portion of the wedge base valve;
A terminal fitting housed inside the fitting portion;
In the terminal metal fitting, an elastic holding piece that restricts detachment of the base portion from the fitting portion by locking with the base portion inserted into the fitting portion is formed.
From the elastic holding piece, a locking part is extended that is capable of restricting deformation of the elastic holding piece in a direction away from the peripheral wall by being locked to the peripheral wall constituting the fitting part. Valve socket characterized by The valve socket according to claim 1, wherein the locking portion is disposed closer to the opening end of the fitting portion than the elastic holding piece. The locking portion is formed with an inclined portion that is inclined with respect to the insertion direction of the base portion with respect to the fitting portion and is inclined toward the depth of the fitting portion as the distance from the peripheral wall increases. The valve socket according to claim 1 or 2, wherein the valve socket is provided. A part of the peripheral wall is a bending portion that can be elastically bent toward the outer surface side,
The elastic holding piece is formed with a contact piece capable of contacting the inner surface of the bent portion,
When the base portion elastically bends the elastic holding piece in the process of inserting the base portion into the fitting portion, the abutment piece abuts on the bending portion, so that the bending portion is The valve socket according to any one of claims 1 to 3, wherein the valve socket is integrally displaced with the elastic holding piece and is elastically displaced toward the outer surface side.

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