JPH0536768U - connector - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a connector having a simple structure and an easily removable locking mechanism. [Structure] When a lock piece 23 provided on a rear holder 12 is inserted into stopper portions 13 provided on both side surfaces 11a of the housing 11 and the housing 11 and the rear holder 12 are pressed so as to come close to each other, an outer surface 23a of the lock piece 23 is pressed. The provisional engagement claw 24 provided elastically deforms the lock piece 23 and squeezes into the stopper portion 13, and the elastic deformation is restored at the position of the provisional coupling groove 14 provided in the stopper portion 13 so that the two 14 and 24 are It is engaged and enters a temporary connection state. When the terminal fitting is inserted in this state and the housing 11 and the rear holder 12 are pushed again so as to come close to each other, the main engagement claw 25 provided on the lock piece 23 also digs into the stopper portion 13 to deform the lock piece 23, and the stopper The main coupling groove 15 provided in the portion 13 is engaged to enter the main coupling state.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a connector that double-locks terminal fittings housed in a housing by a rear holder fitted to the rear end of the housing.

[0002]

[Prior Art]

 A rear preset type connector shown in Japanese Utility Model Laid-Open No. 2-34083 is an example of a connector that double-holds a terminal fitting housed in the housing by a rear holder fitted to the rear end of the housing. This connector has the effect of preventing the terminal fittings from coming off from the housing by double-locking the terminal fittings that are engaged by the lance into the terminal housing chamber of the housing by further pressing with the rear holder. It is an elevated one. For this reason, this connector is temporarily connected to the housing with the rear holder partially inserted, and the terminal fitting is inserted through the hole of the rear holder into the terminal storage chamber of the housing. A two-stage locking mechanism is used that inserts and holds the connection.

As shown in FIG. 9, this lock mechanism includes a box-shaped stopper portion 2 provided on both side surfaces 1 a of the housing 1, a main engagement piece 4 provided on both side surfaces 3 a of the rear holder 3, and It is configured by the temporary engagement piece 5. The main engagement piece 4 extends in the insertion direction into the housing 1, is formed in a band shape that is elastically deformed in a horizontal plane, and has a main engagement protrusion 6 on the outer surface. Further, the temporary engagement piece 5 is provided above and below the main engagement piece 4 in parallel with the main engagement piece 4 and has a strip shape that is elastically deformed in the vertical plane. The temporary engaging projections 7 are provided on the upper surface and on the lower surface of the lower temporary engaging piece 5b, respectively. On the other hand, a main engagement stopper 8 and a temporary engagement stopper 9 are arranged inside the stopper portion 2. When the rear holder 3 is inserted and pressed from the rear portion of the housing 1, the temporary engagement piece 5 is inserted. The main engagement piece 4 and the main engagement piece 4 are inserted into the inside of the box-shaped stopper portion 2, and first, the temporary engagement protrusion 7 and the temporary engagement stopper 9 are engaged with each other as shown in FIG. As shown in, the main engagement protrusion 6 and the main engagement stopper 8 were engaged with each other.

[0004]

[Problems to be solved by the device]

 However, in the lock mechanism having such a structure, the engaging pieces for bringing the housing 1 and the rear holder 2 into the two-stage coupled state are divided into the main engaging piece 4 and the temporary engaging piece 5. In addition, since both 4,5 are formed so as to be elastically deformed in the planes perpendicular to each other, the structure is complicated, and the protrusions 6, 7 provided on the engaging pieces 4, 5 are complicated. Since the structure of the stopper portion 2 engaged with is complicated, the die has a delicate structure and the manufacturing cost is high. Therefore, it is difficult to apply such a lock mechanism that requires a fine mold to a small connector.

Further, since the projections 6 and 7 provided on the engagement pieces 4 and 5 are engaged inside the box-shaped stopper portion 2, it is difficult to remove them from the outside, and if they are forcibly removed, The engagement pieces 4 and 5 were sometimes broken. In order to avoid this, it is conceivable to use the groove 10 provided through the stopper portion 2 as shown in FIG. 9 to release the engagement, but the stopper portion 2 has a complicated structure as described above. Due to the structure, the groove 10 must be thin and cannot be removed without using a tool, which is inconvenient.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a rear preset type connector having a simple structure and a lock mechanism that can be easily removed. That is.

[0007]

[Means for Solving the Problems]

 To achieve the above object, the present invention comprises a housing having a terminal accommodating chamber, a terminal fitting inserted into the terminal accommodating chamber, and a rear holder fitted to a rear end of the housing. Is provided with a locking piece that elastically deforms and presses the terminal fitting inside the terminal housing chamber when the rear holder is fitted in the housing.The inserted terminal fitting is engaged in the terminal housing chamber. And a guide surface for elastically deforming the locking piece to be inserted in a direction intersecting the inserting direction, the lance holding the terminal piece inside the terminal accommodating chamber, and the terminal between the housing and the rear holder. A temporary coupling part that temporarily connects the housing and the rear holder at a position before the locking piece inserted into the storage chamber is elastically deformed, and the locking piece elastically deforms to press the terminal fitting. Houjin at the position And a main coupling part for holding the rear holder in a coupled state. The temporary coupling part and the main coupling part are composed of a convex portion and a concave portion, respectively, which engage with each other. Provided on the same elastically deformable lock piece protruding along the fitting direction of the rear holder, and arranged on the same surface of the lock piece at a distance in the fitting direction. ..

[0008]

[Action]

 In the connector of the present invention, when the rear holder is assembled from the rear end of the housing, the locking piece of the rear holder is inserted into the terminal accommodating chamber of the housing, and the locking piece provided between the rear holder and the housing is elastically deformed. Then, the temporary coupling portion provided on the lock piece is engaged and brought into a connected state. When the terminal fitting is inserted into the terminal housing chamber of the housing in this state, the terminal fitting is engaged with the lance inside the terminal housing chamber and held in the terminal housing chamber. After that, when the rear holder is pressed again toward the housing, the locking piece is elastically deformed in a direction orthogonal to the insertion direction following the guide surface in the terminal housing chamber, and the tip of the locking piece presses the terminal fitting. At the same time, the lock piece is elastically deformed again, the main coupling portion provided on the lock piece is engaged, and the terminal fitting is locked inside the terminal housing chamber.

[0009]

【Example】

 FIG. 1 shows a housing 11 and a rear holder 12 of a connector according to a first embodiment of the present invention. The housing 11 is provided with a cylindrical stopper portion 13 having a through hole 13a along the insertion direction of the rear holder 12 inside a rectangular parallelepiped projecting on both side surfaces 11a. The outer wall 13b of the stopper portion 13 is provided with two recesses 14 and 15 that are cut out from the front end 13c along the insertion direction of the rear holder 12. These recesses are composed of a temporary engagement groove and a main engagement groove located below the temporary engagement groove and longer than the temporary engagement groove (hereinafter, in the present embodiment, the temporary engagement groove is formed). The groove 14 and the main engagement groove 15).

A fitting recess 16 for fitting with the rear holder 12 is provided at the rear of the housing 11, and an abutting surface 17 that comes into close contact with the front surface 12 a of the inserted rear holder 12 is provided at the back of the fitting recess 16. Is provided. Further, the both side walls 16a of the fitting recess 16 are provided with notches 18 reaching the abutting surface 17 from the rear end 11b of the housing 11, and the notches 18 will be described later when the rear holder 12 is inserted. It is designed to insert the lock piece inside. As shown in FIG. 2, a terminal housing chamber 20 into which the terminal fitting 19 is inserted is provided in front of the abutting surface 17, and the terminal fitting 19 is attached to the lower surface inside the terminal housing chamber 20. A matching lance 22 is provided, and the upper surface of the terminal storage chamber 20 is high at the entrance 20a and low at the back 20b, so that the height difference is smoothly connected between the two parts 20a and 20b. A guide surface 21 is provided.

On the other hand, as shown in FIG. 1, the rear holder 12 is provided with a plate-like lock piece 23 whose tip extends in the insertion direction into the housing 11 so as to project from the both side surfaces of the rear holder 12 to the left and right. ing. Further, two convex portions 24, 25 are provided on the outer side surface 23a of the lock piece 23. These convex portions 24 and 25 are composed of a temporary engagement claw and a main engagement claw located on the lower rear side of the temporary engagement claw (hereinafter, in the present embodiment, the temporary engagement claw 24, the main engagement claw). The nail 25). These claws 24, 25 have a shape having slopes 24a, 25a on the front side, and the thickness of the lock piece 23 including the height of the claws 24, 25 is larger than the width of the inner cross section of the stopper portion 13. The lock piece 23 is thin, and the width of the lock piece 23 is smaller than the height of the inner cross section of the stopper portion 13. The claws 24 and 25 and the two grooves 14 and 15 form a temporary joint portion 26 and a main joint portion 27.

Further, the rear holder 12 has an outer peripheral dimension that fits in the fitting recess 16 provided in the housing 11, and has a terminal hole 28 penetrating therethrough in the inside. Further, on the upper side of the terminal hole 28, two strip-shaped locking pieces 29 extending forward from the front surface 12a of the rear holder 12 are provided in one terminal hole 28, and these locking pieces 29 are provided. When the rear holder 12 is inserted into the housing 11, the rear holder 12 is arranged to be inserted into the above-mentioned terminal accommodating chamber 20 at the same time.

In order to connect the housing 11 and the rear holder 12 configured as described above, first, all the locking pieces 29 of the rear holder 12 are aligned so that they enter the terminal storage chamber 20 provided in the housing 11. , The housing 11 and the rear holder 12 are pushed by hand to bring the both 11 and 12 close to each other. Then, the lock piece 23 of the rear holder 12 is inserted into the stopper portion 13 of the housing 11, and the temporary engaging claw 24 provided on the lock piece 23 abuts on the rear end portion 13d of the stopper portion 13. Since a slope 24a is provided on the front side of the lock piece 23, the provisional engaging claw 24 extends into the stopper portion 13 and the lock piece 23 is elastically deformed. Then, when the temporary engaging claw 24 is moved to the position of the temporary engaging groove 14, the elastic deformation of the lock piece 23 is restored, and the temporary engaging claw 24 is moved to the position of the temporary engaging groove 14 as shown in FIG. Are engaged with each other to be in a temporary combined state.

At this time, the locking piece 29 provided on the rear holder 12 is located at the inlet portion 20a of the terminal storage chamber 20 as shown in FIG. 2, and the terminal hole 28 of the rear holder 12 through the terminal storage chamber of the housing 11. A space where the terminal fitting 19 can be inserted is secured through the inner part 20b of the terminal 20. Then, in this temporarily coupled state, the terminal fitting 19 is inserted into the terminal hole 28 from the rear of the rear holder 12 and is housed in the terminal housing chamber 20 in front of the tip of the locking piece 29 provided in the rear holder 12, It is held in the terminal housing chamber 20 by being engaged with the lance 22 on the lower surface of the terminal 20.

After that, when the housing 11 and the rear holder 12 are pressed again, as shown in FIG. 3, the locking piece 29 is elastically deformed downward along the guide surface 21 on the upper surface of the terminal accommodating chamber 20, and the tip end thereof is deformed. The portion presses the terminal fitting 19. Then, when the main engagement claw 25 of the lock piece 23 slips into the stopper portion 13 and the lock piece 23 is elastically deformed again, and the housing 11 and the rear holder 12 are completely fitted, as shown in FIG. The main engagement claw 25 is at the position of the main engagement groove 15, and the elastic deformation is restored to the main engagement state.

At this time, the rear holder 12 is fitted into the fitting concave portion 16 of the housing 11, the front surface 12 a of the rear holder 12 is brought into close contact with the abutting surface 17 of the housing 11, and the front end of the locking piece 29 and the lance 22 allow the terminal. The metal fitting 19 is doubly locked and held so as not to come off from the terminal storage chamber 20. Further, in this state, the lock piece 23 penetrates the stopper portion 13 and protrudes from the front end 13c, and the protruding portion is pushed inward by hand to elastically deform, and the engaging claws 24 and 25 and the engaging groove. The housing 11 and the rear holder 12 can be separated from each other by disengaging them from the members 14 and 15.

According to the above-described lock mechanism, the temporary coupling portion 26 and the main coupling portion 27, which are in the two-stage coupling state of the temporary coupling state and the final coupling state, are provided on the elastically deformable lock piece 23. Since the structure is simple and the mold for molding is simple, the manufacturing cost can be reduced. Further, even when detaching, the temporary joined state and the main joined state can be released by operating one lock piece 23, so that there is an advantage that the detachment is easy.

FIG. 6 shows a second embodiment of the connector according to the present invention. This connector is composed of a protrusion 32 provided on both side surfaces 31a of the housing 31, and a plate-like lock piece 34 located on both side surfaces 33a of the rear holder 33 and extending in the insertion direction into the housing 31. have. The lock piece 34 is provided with two recesses 35 and 36 side by side along the insertion direction of the rear holder 33 into the housing 31. These recesses 35 and 36 are formed in rectangular holes (hereinafter, referred to as rectangular holes 35 and 36 in this embodiment), and the temporary holes 37 and 36 and the projections 32 are formed by the rectangular holes 35 and 36 and the convex portion 32. A coupling portion 38 is formed. The convex portion 32 has a slope 32a in the direction in which the rear holder 33 is inserted, and the lock piece 34 that is inserted slides on the slope 32a to elastically deform the lock piece 34. ..

When the housing 31 and the rear holder 33 are pushed so as to come close to each other, the above-mentioned convex portion 32 digs into the inside of the lock piece 34. Then, as shown in FIG. 7, the elastic deformation is restored at the position of the first rectangular hole 35 described above, the convex portion 32 is engaged with the rectangular hole 35, and the housing 31 and the rear holder 33 are temporarily connected. Further, when the housing 31 and the rear holder 33 are further pushed from this temporarily connected state so as to approach each other, the lock piece 34 is elastically deformed again by the convex portion 32, and the elastic deformation is restored at the position of the next rectangular hole 36. Then, as shown in FIG. 8, the convex portion 32 is engaged with the rectangular hole 36 to be in the main combined state.

According to this lock mechanism, the protrusions 32 for establishing the temporary connection state and the final connection state can be made common, and the structure is further simplified. In addition, both coupling states can be released by operating one lock piece 34, and since the lock piece 34 is on the outside, there is an advantage that it can be easily operated by hand and can be removed more easily.

In the first embodiment, the engaging grooves 14 and 15 are provided in the stopper portion 13 and the engaging claws 24 and 25 are provided in the locking piece 23. The artificial nails 24 and 25 may be replaced. Further, in the second embodiment, the convex portion 32 is formed on the housing 31, and the two rectangular holes 35 and 36 that engage with the convex portion 32 are provided on the locking piece 34. On the contrary, the protrusion may be provided on the inner side of the lock piece, and two recesses that engage with the protrusion may be provided on both side surfaces of the housing. Further, in the first and second embodiments, the elastically deformable lock pieces 23 and 34 are provided on the rear holders 12 and 33, but the stopper portions 13 or the convex portions 32 of the housings 11 and 31 are provided. It may be replaced with.

[0022]

[Effect of the device]

 As described above in detail, in the connector according to the present invention, the temporary coupling portion and the permanent coupling portion that make the housing and the rear holder into the two-stage coupling state of the temporary coupling state and the final coupling state are provided in one lock piece. However, since the structure is extremely simple, there is an effect that the mold for molding this can be made simple and the manufacturing cost can be reduced. Further, since the two coupled states can be released by operating one lock piece, there is an advantage that the removal is easy.

[Brief description of drawings]

FIG. 1 is a perspective view showing a housing and a rear holder of a connector according to a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a temporary connection state of the connector of FIG.

FIG. 3 is a vertical cross-sectional view showing the main connection state of the connector of FIG.

FIG. 4 is a side view showing a temporary connection state of the connector of FIG.

FIG. 5 is a side view showing the main connection state of the connector of FIG.

FIG. 6 is a perspective view showing a housing and a rear holder of a connector according to a second embodiment of the present invention.

7 is a longitudinal sectional view of a lock piece portion showing a temporary connection state of the connector of FIG.

FIG. 8 is a vertical cross-sectional view of a lock piece portion showing a fully connected state of the connector of FIG.

FIG. 9 is a perspective view showing a housing and a rear holder in a conventional connector.

10 is a vertical cross-sectional view of a lock piece portion showing a temporary connection state of the connector of FIG.

FIG. 11 is a vertical cross-sectional view of a lock piece portion showing a fully connected state of the connector of FIG. 9.

[Explanation of symbols]

11, 31 ... Housing, 12, 33 ... Rear holder, 14, 15, 35, 36 ... Recessed portion, 19 ... Terminal fitting, 20 ... Terminal storage chamber, 21 ... ... Guide surface, 22 ... Lance, 23, 34 ... Lock piece, 24, 25, 32 ...
Convex parts, 26, 37 ... Temporary connecting part, 27, 38 ... Main connecting part, 29 ... Locking piece.

Claims (1)

[Scope of utility model registration request] 1. A housing (11, 31) having a terminal storage chamber (20), a terminal fitting (19) inserted into the terminal storage chamber, and a rear holder (12, 12) fitted to the rear end of the housing. 33), the rear holder is provided with a locking piece (29) that elastically deforms in the terminal housing chamber and presses the terminal fitting when the rear holder is fitted in the housing, and the terminal housing chamber includes , A lance (22) for engaging and retaining the inserted terminal fitting in the terminal accommodating chamber, and a guide surface (21) for following the locking piece to be inserted and elastically deforming in a direction intersecting the inserting direction. Is provided between the housing and the rear holder to temporarily connect the housing and the rear holder at a position before the locking piece inserted into the terminal accommodating chamber is elastically deformed ( 26, 37) and the staff A main coupling portion (27, 38) for holding the housing and the rear holder in a coupled state is provided at a position where the stopper elastically deforms and presses the terminal fitting, and the temporary coupling portion and the main coupling portion are respectively provided with each other. The engaging convex portions (24, 25, 32) and concave portions (14, 15, 35,
36), and one of these protrusions or recesses is provided on the same elastically deformable lock piece (23, 34) projecting along the fitting direction of the rear holder, and the same lock piece A connector characterized in that it is arranged on the surface at an interval in the fitting direction.