JP4872881B2 - Valve socket - Google Patents

Description

  The present invention relates to a valve socket.

Conventionally, what is described in the following patent document 1 is known as a valve socket. This valve socket is provided with a terminal fitting in a cylindrical fitting part for inserting a base part of a wedge base valve. When the base part is inserted in the fitting part, The formed elastic holding piece is locked to the retaining protrusion of the base part, and the base part is held in the retaining state by this locking action.
JP 2001-273959 A

However, the elastic holding piece is provided in the vicinity of the opening of the fitting portion. For example, when the base portion is inserted into the fitting portion from an oblique direction with respect to the normal insertion direction, the elastic holding piece is seated. It will bend and you will not be able to hold the base.
The present invention has been completed based on the above circumstances, and an object of the present invention is to provide a valve socket capable of securely holding a base portion by preventing buckling of an elastic holding piece.

  The present invention is a valve socket comprising a substantially cylindrical fitting portion for inserting a base portion of a wedge base valve, and a terminal fitting housed inside the fitting portion. Before the base part is inserted into the fitting part, the base part is retracted to the receiving position out of the insertion path of the base part, but when the base part is properly inserted into the fitting part, the base part moves to the locking position. The elastic holding piece that restricts the base part from being detached from the fitting part by being locked to the base part, and is connected to the back side of the fitting part with respect to the elastic holding piece and from the inner peripheral surface side of the fitting part Formed to bulge to the axial center side, provided with a bulging portion that has entered the insertion path of the base portion, the connecting portion between the elastic holding piece and the bulging portion is determined by the base portion inserted into the fitting portion The bulging portion is slidably contacted with the inner peripheral surface of the fitting portion by bending and deforming toward the inner peripheral surface side of the fitting portion. Te moved to the opening side of the fitting portion, the elastic holding pieces along with this is characterized in was configured to move from the receiving position to the locking position.

  According to such a configuration, since the elastic holding piece is retracted to the receiving position when the base portion of the wedge base valve is inserted into the fitting portion of the valve socket, there is no possibility that the elastic holding piece is buckled by the base portion. . The base part contacts the bulging part and bends and deforms to the inner peripheral surface side of the fitting part, and the base part is fitted while sliding the connecting part of the elastic holding piece and the bulging part on the inner peripheral surface of the fitting part. The elastic holding piece can be moved from the receiving position to the locking position by moving to the opening side of the joint. As a result, the elastic holding piece is locked to the base portion and the separation of the base portion from the fitting portion is restricted. Therefore, it is possible to securely hold the base portion while preventing the elastic holding piece from buckling.

The following configuration is preferable as an embodiment of the present invention.
On the inner circumferential surface of the fitting portion, a housing portion that can accommodate the connecting portion when the bulging portion is normally bent and deformed is recessed, and the bottom surface of the housing portion and the inner circumferential surface of the fitting portion There may be a configuration in which a step is set for detecting that the bulging portion is normally bent and deformed when the connecting portion strikes the bottom surface of the accommodating portion.
According to such a configuration, when the bulging portion is normally bent and deformed with the insertion of the base portion, the connecting portion is accommodated in the accommodating portion. At this time, since a step is set between the bottom surface of the accommodating portion and the inner peripheral surface of the fitting portion, it is confirmed that the bulging portion has been properly bent and deformed by hitting the bottom surface of the accommodating portion by the connecting portion. An operator can be detected.

It is good also as a structure which the taper part which has the inclined surface which goes away from the axial center side of a fitting part is formed in the position where a connection part slides in the inner peripheral surface of a fitting part toward the opening side of a fitting part. .
According to such a configuration, when the connecting portion is brought into sliding contact with the inner peripheral surface of the fitting portion and moved to the opening side of the fitting portion, the connecting portion is moved away from the axis of the fitting portion by the taper portion. Since it moves, the contact resistance between the inner peripheral surface of a fitting part and a connection part can be reduced. Therefore, the fitting force when inserting the base portion into the fitting portion can be reduced.

The bulging portion may be configured to include a correction surface that corrects the base portion so that the base portion assumes a normal insertion posture when the contact angle with the base portion is an acute angle.
According to such a configuration, when the base portion is inserted into the fitting portion, the base portion can be corrected to a normal insertion posture by the correction surface.

  According to the present invention, it is possible to reliably hold the base portion by preventing the elastic holding piece from buckling.

<Embodiment>
An embodiment of the present invention will be described with reference to the drawings of FIGS.
In the present embodiment, the valve socket 10 is made of synthetic resin, and the substantially upper half region thereof is a fitting portion 11 opened to the upper surface side as shown in FIG. 11, and the substantially lower half region is illustrated. It becomes the hood part 12 for fitting the connector which does not carry out. In the following description, the front-rear direction refers to the left as the front and the right as the rear with respect to the left-right direction in FIG. The width direction is based on the vertical direction in FIG.

  As shown in FIG. 1, the fitting portion 11 has a substantially rectangular tube shape that is long in the width direction. 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 extending downward from the upper edge of the front wall 13F, of the front wall 13F and the rear wall 13R. A region sandwiched between the pair of slits (substantially central region in the width direction) is a rectangular plate-shaped regulating wall 14 that extends upward in a cantilevered manner. The restriction wall 14 is rigid enough to restrict displacement to the outer surface side of the restriction wall 14 when a connecting portion 23 between an elastic holding piece 21 and a bulging portion 22 described later is in sliding contact with the inner surface of the restriction wall 14. have.

  As shown in FIG. 1, three terminal fittings are accommodated in the valve socket 10. Among these terminal fittings, the upper terminal fitting in the figure is the first terminal fitting 20A, the lower left terminal fitting is the second terminal fitting 20B, and the lower right terminal fitting is the third terminal fitting 20C. The first terminal fitting 20 </ b> A includes one tab 24 that protrudes downward in the hood portion 12 and two elastic contact pieces 25 that are accommodated in the fitting portion 11. Each of the second and third terminal fittings 20B and 20C has one tab 24 projecting downward in the hood portion 12, one elastic holding piece 21 and one piece accommodated in the fitting portion 11. An elastic contact piece 25 is provided.

  Each of the terminal fittings 20A to 20C is formed by punching and bending a single metal flat plate. For this reason, the elastic holding piece 21, the tab 24, the elastic contact piece 25, and the like are integrally provided through the base portion 26 as shown in FIGS. Further, the elastic holding piece 21, the tab 24, and the elastic contact piece 25 have a common shape in each of the terminal fittings 20A to 20C. In the following description of the structure of the second and third terminal fittings 20B and 20C alone, the right side (right side) in FIGS. 5 and 8 is the front (front side), and the left side (left side) is the rear (rear side). The direction perpendicular to the plane of the paper is the up-down direction.

  As shown in FIGS. 6 and 10, the tab 24 is configured to extend rearward from the upper end portion of the vertical wall 27 rising upward from the base portion 26 in parallel with the base portion 26. Further, the tab 24 is arranged side by side in the width direction at a position facing the lower end of the base portion 51 on the back wall of the fitting portion 11 in a state where the terminal fittings 20A to 20C are mounted in the fitting portion 11. , And protrudes through the back wall of the fitting portion 11 toward the hood portion 12 side. Note that a holding piece 29 for holding the terminal fittings 20A to 20C in the fitting portion 11 in a retaining state is formed on the lower surface of the base portion 26 in a cantilevered manner.

  As shown in FIGS. 6 and 9, the elastic contact piece 25 is folded upward from the front edge of the base portion 26 and extended backward, and the extended end is folded downward to form a contact 25A. Yes. Thereby, each elastic contact piece 25 can bend in the direction in which the contact point 25 </ b> A approaches or separates from the base portion 26 with its front edge as a fulcrum. When the second and third terminal fittings 20B and 20C are mounted in the fitting portion 11, the distance between the elastic contact piece 25 of the second terminal fitting 20B and the elastic contact piece 25 of the third terminal fitting 20C in the front-rear direction. Is set smaller than the plate thickness of the base portion 51. For this reason, when the base part 51 is properly inserted into the fitting part 11, the contact point 25 </ b> A of the elastic contact piece 25 is elastically contacted to a terminal part (not shown) provided on the outer surface of the base part 51. It is supposed to be.

  On the side of the elastic contact piece 25, a bulging portion 22 and an elastic holding piece 21 are provided continuously in the front-rear direction. The bulging portion 22 bulges upward from the base portion 26. The upper surface of the bulging portion 22 has a planar shape, and is a correction surface 22A having a slight downward slope toward the front. The correction surface 22A is set to have a protruding height from the base portion 26 substantially the same as the contact point 25A of the elastic contact piece 25, and is set to a position corresponding to the contact point 25A in the front-rear direction. That is, when the second and third terminal fittings 20B and 20C are mounted in the fitting portion 11, the correction surface 22A has a contact angle with the base portion 51 (the base portion 51 having the correction surface 22A as a reference surface). When the insertion angle is an acute angle, the base portion 51 is corrected to a normal insertion posture and the contact point 25A is protected.

  The elastic holding piece 21 includes a locking surface 21A that extends obliquely upward from the front end portion of the bulging portion 22, and extends downward from the upper end portion of the locking surface 21A. Further, the front end portion of the elastic holding piece 21 is arranged at a position substantially aligned with the front edge portion of the elastic contact piece 25. As shown in FIG. 2, when the second and third terminal fittings 20 </ b> B and 20 </ b> C are mounted in the fitting portion 11, the elastic holding piece 21 is as shown in FIG. 2 before the base portion 51 is inserted into the fitting portion 11. Although the base portion 51 is retracted to the receiving position deviated from the insertion path of the base portion 51, after the base portion 51 is properly inserted into the fitting portion 11, the insertion of the base portion 51 is performed as shown in FIG. It enters the path and moves to a locking position where the locking surface 21A is locked to the retaining protrusion 52 of the base portion 51.

  When the second terminal fitting 20B and the third terminal fitting 20C are mounted in the fitting portion 11, the base portion 26 is arranged in a state of being substantially in contact with the front wall 13F and the rear wall 13R, and the base portions 26 face each other. Arranged to be in a state. That is, the elastic holding piece 21 of the second terminal fitting 20B and the elastic holding piece 21 of the third terminal fitting 20C are arranged on both sides of the base portion 51, and the interval between the elastic holding pieces 21 at the receiving position is the base portion 51. It is set to be larger than the plate thickness. On the other hand, the interval between the two bulging portions 22 is set to be smaller than the plate thickness of the base portion 51. For this reason, when the base part 51 is inserted into the fitting part 11, the base part 51 does not contact the elastic holding piece 21 but first comes into contact with both the bulging parts 22 and breaks between them.

  Now, a configuration for moving the elastic holding piece 21 from the receiving position to the locking position will be described. First, in the receiving position, the connecting portion 23 between the elastic holding piece 21 and the bulging portion 22 is in contact with the tapered portion 16 formed on the inner surface of the regulating wall 14. When the base portion 51 is inserted between the bulging portions 22, the correction surface 22 </ b> A of the bulging portion 22 approaches the inner surface of the restriction wall 14, so that the entire bulging portion 22 is bent and deformed so as to extend in the vertical direction. On the other hand, the bulging portion 22 is restricted from moving downward (the back side of the fitting portion 11) by the end edge of the base portion 26 coming into contact with the back wall of the fitting portion 11. For this reason, the upper end part (connecting part 23) of the bulging part 22 moves upward (the opening side of the fitting part 11) while slidingly contacting the taper part 16, and accordingly, the elastic holding piece 21 is locked. Head to.

  Thereafter, when the connecting portion 23 moves further upward and the elastic holding piece 21 reaches the locking position, the opposing surface 22B of the bulging portion 22 that faces the locking surface 21A of the elastic holding piece 21 is formed on the base portion 51. On the other hand, the engaging surface 21A is substantially orthogonal to the insertion direction of the base 51 while maintaining the angle between the opposing surface 22B and the engaging surface 21A is engaged with the retaining protrusion 52 of the base 51 from above. Stop. For this reason, when the elastic holding piece 21 is in the locking position, the upward release of the base portion 51 from the fitting portion 11 is restricted. Since the taper portion 16 has an inclined surface that moves away from the axial center side of the fitting portion 11 toward the opening side of the fitting portion 11, as the base portion 51 is inserted into the fitting portion 11. The contact resistance between the connecting portion 23 and the inner surface of the regulating surface 14 is reduced, so that the fitting force when the base portion 51 is inserted into the fitting portion 11 can be reduced.

  In addition, an accommodating portion 17 that can accommodate the connecting portion 23 is formed in a groove shape extending in the vertical direction above the tapered portion 16 in the regulating wall 14. A step 18 is provided between the bottom surface of the housing portion 17 and the tapered portion 16. The step 18 is set so that the connecting portion 23 is fitted into the accommodating portion 17 when the bulging portion 22 is normally bent and deformed. Further, since the connecting portion 23 is urged by the taper portion 16 by the elastic force of the bulging portion 22 that has been bent and deformed, when the connecting portion 23 reaches the step 18, the connecting portion 23 falls into the accommodating portion 16, and the accommodating portion 16. The operator can detect that the bulging portion 22 has been normally bent and deformed by hitting the bottom surface of the.

The present embodiment is configured as described above, and its operation will be described subsequently.
When assembling the wedge base valve 50 to the valve socket 10, a chuck (not shown) of an automatic machine picks up the light emitting portion 53 and inserts the base portion 51 into the fitting portion 11 from above. Since the elastic holding piece 21 is out of the insertion path of the base portion 51 at the receiving position, the base portion 51 does not come into contact with the elastic holding piece 21 but contacts both the bulging portions 22. Enter. Therefore, it is possible to prevent the elastic holding piece 21 from being buckled by the base portion 51. The base 51 is corrected to a normal insertion posture by the two correction surfaces 22A.

  In parallel with this, the terminal portion of the base portion 51 is elastically contacted with the elastic contact piece 25, and both are connected so as to be conductive. When both the bulging portions 22 are bent and deformed toward the inner surface side of the regulating wall 14 by the base portion 51, both the connecting portions 23 move upward while being in sliding contact with the tapered portion 16. At this time, the taper portion 16 reduces the fitting force when the base portion 51 is inserted into the fitting portion 11. When both the bulging portions 22 are completely bent by the base portion 51 (a state in which the bulging portions 22 are normally bent and deformed), both the connecting portions 23 are fitted into the bottom surface of the storage portion 17 while being urged. The bottom surface of the part 17 is hit. Thereby, the operator can know that the bulging part 22 deform | transformed normally.

  As the deformation of the bulging portions 22 progresses, the elastic holding piece 21 moves toward the locking position. As a result, the facing surface 22B faces the base portion 51. On the other hand, the locking surface 21 </ b> A of the elastic holding piece 21 turns around from the upper side with respect to the retaining protrusion 52 and is orthogonal to the insertion direction of the base portion 51. Thus, when the elastic holding piece 21 reaches the locking position, the locking surface 21A of the elastic holding piece 21 is locked to the retaining protrusion 52 from above, so that the base portion 51 is retained in the fitting portion 11 in a retaining state. Is done.

  As described above, in this embodiment, the elastic holding piece 21 is retracted to the receiving position at the start of the insertion of the base portion 51 to prevent buckling, and the elastic holding piece 21 is positioned at the locking position when the insertion of the base portion 51 is completed. Then, the base portion 51 can be held in the fitting portion 11 in the retaining state by being locked to the retaining protrusion 52. Further, when the connecting portion 23 is accommodated in the accommodating portion 17 and hits the bottom surface thereof, the operator can detect that the elastic holding piece 21 is normally bent and deformed. Moreover, since the taper part 16 is provided in the inner surface of the control wall 14, the fitting force at the time of inserting the base part 51 can be reduced. Further, since the base portion 51 is corrected to the normal insertion posture by the correction surface 22A of the bulging portion 22, a stable insertion operation can be realized.

<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) Although the elastic holding piece 21 and the bulging portion 22 are provided integrally with the elastic contact piece 25 in this embodiment, according to the present invention, the elastic holding piece 21 and the bulging portion 22 are separated from the elastic contact piece 25. It may be provided on the body.
(2) Although the fitting portion 11 is formed in a rectangular tube shape in the present embodiment, the fitting portion 11 may be formed in a cylindrical shape according to the present invention.
(3) Although the accommodating part 17 is formed in the groove shape extended in an up-down direction in this embodiment, according to this invention, it is good also considering the accommodating part 17 as a square hole which can accommodate the connection part 23. FIG.

Top view of valve socket Cross section viewed from the side when the elastic holding piece is in the receiving position Cross section viewed from the side when the elastic retaining piece is in the locking position Top view of the mating part Top view of the second terminal fitting Its side view Front view Top view of third terminal fitting AA line sectional view of FIG. Side view of third terminal fitting Sectional view showing the wedge base valve installed in the valve socket

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Valve socket 11 ... Fitting part 16 ... Tapered part 17 ... Accommodating part 18 ... Step 20A ... 1st terminal metal fitting 20B ... 2nd terminal metal fitting 20C ... 3rd terminal metal fitting 21 ... Elastic holding piece 22 ... Swelling part 22A ... Straightening surface 23 ... Connection part 50 ... Wedge base valve 51 ... Base part

Claims (4)

A fitting portion having a substantially cylindrical shape for inserting the base portion of the wedge base valve;
A valve socket provided with a terminal fitting housed inside the fitting portion,
In the terminal fitting,
Before the base portion is inserted into the fitting portion, the base portion is retracted to the receiving position outside the insertion path of the base portion, but is locked when the base portion is properly inserted into the fitting portion. An elastic holding piece that moves to a position and locks to the base portion to regulate the separation of the base portion from the fitting portion;
A bulging portion that is connected to the back side of the fitting portion with respect to the elastic holding piece and bulges from the inner peripheral surface side of the fitting portion toward the axial center, and enters the insertion path of the base portion. And
The connecting portion between the elastic holding piece and the bulging portion is fitted by the bulging portion being bent and deformed toward the inner peripheral surface of the fitting portion by the base portion inserted into the fitting portion. A valve socket in which the elastic holding piece moves from the receiving position to the locking position along with the sliding movement of the inner peripheral surface of the portion to the opening side of the fitting portion. On the inner peripheral surface of the fitting portion, a receiving portion that can receive the connecting portion when the bulging portion is normally bent and deformed is recessed, and the bottom surface of the receiving portion and the inside of the fitting portion are provided. The level | step difference for detecting that the said bulging part deform | transforms normally and deform | transforms when the said connection part hits the bottom face of the said accommodating part between the surrounding surfaces is set. Valve socket. A tapered portion having an inclined surface that is further away from the axial center side of the fitting portion as it goes toward the opening side of the fitting portion is formed at a position where the connecting portion is in sliding contact with the inner peripheral surface of the fitting portion. The valve socket according to claim 1 or 2. 4. The bulging portion includes a correction surface that corrects the base portion so that the base portion assumes a normal insertion posture by forming an acute contact angle with the base portion. 5. The valve socket according to one item.

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