JP2011014396A - Attaching structure for harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the certainty of fixing a harness onto a housing using a strain relief.SOLUTION: A connector includes a harness assembly constituted by connecting a terminal to an end part of the harness 41, the housing 2 for storing one end part of the harness 41 from a storage port together with the terminal, and the strain relief 3 stored into the housing 2 while locking the harness assembly and the housing 2. The strain relief 3 is stored in the housing 2, to cover the storage port, and fixing piece 33 thereof extended into the housing 2 is embedded together with the end part of the harness 41 into the housing 2 with a hot melt 5 filled in the housing 2.

Description

  The present invention relates to a harness mounting structure for fixing a harness connected to a terminal to a housing accommodating the terminal by a strain relief.

  As a harness mounting structure using a strain relief, Patent Document 1 below discloses an electrical connector in which a plurality of conductors are connected and held by a connection cover in a housing having contacts. In this electrical connector, the conductor is fixed to the housing together with the connection cover by a strain relief member. The strain relief member includes a pair of latch shoulders, and the latch shoulders engage with a pair of latch protrusions provided on the housing, thereby being latched and fixed to the housing.

JP-A-6-89748

  Since the harness is fixed by a mechanical method in which the latch protrusion and the latch shoulder are engaged with each other, the harness may be securely fixed depending on how the strain relief and the housing are assembled. was difficult.

  This invention is made | formed in view of such a subject, and it aims at providing the attachment structure of the harness which can solve the said subject.

In order to achieve such an object, a harness mounting structure according to the present invention includes a harness assembly configured by connecting a terminal to one end of the harness, and a housing that houses the one end of the harness together with the terminal. A strain relief received in the housing for locking the harness assembly to the housing. The strain relief is received in the housing so as to cover the housing, and a fixing member is extended in the housing. The fixing member is embedded in the housing together with the one end portion of the harness with a solidified material filled in the housing, and is integrated with the housing.
Further, according to the present invention, the strain relief includes a top plate that covers the housing, and a pair of latches that are extended from the opposing edges of the top plate along the inner surface of the side wall of the housing and locked to the housing A flat plate is formed along the inner surface of the side wall of the housing by providing a gap between the piece and the edge of the top plate located between the extended edges of the engagement piece and the engagement piece. And an extended fixing member.
Further, according to the present invention, the housing accommodates a locking member protruding from the locking piece, and a locking recess for locking the locking member on one side wall is provided in the extending direction of the locking piece. It is provided in the inner surface of the side wall of the said housing extended along.
Further, according to the present invention, the locking recess extends on the inner surface of the side wall of the housing extending along the extending direction of the locking piece with a predetermined width along the extending direction of the locking piece. It is characterized by.

  According to the present invention, the fixing force against the pulling force acting on the harness is enhanced by the fixing member integrated with the housing together with the one end portion of the harness, and the harness can be securely fixed to the housing.

It is a perspective view which shows the state which fixed the harness to the housing with the attachment structure of one Embodiment of this invention. It is a disassembled perspective view of the attachment structure shown in FIG. It is a schematic diagram which shows the cross section along the left-right direction of the housing shown in FIG. It is a bottom view of the housing shown in FIG. 2A and 2B are schematic views showing the mounting structure shown in FIG. 1 in a cross-section along the left-right direction, where FIG. 1A shows a cross-section at the insertion hole formation position, and FIG. It is a schematic diagram which shows the flow of the hot melt supplied in the housing from between a locking piece and a fixing piece. It is a schematic diagram which shows a mode that the movement of the hot melt to the extraction direction of a harness is controlled.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of the connector 1 showing a state in which the harness 41 is fixed to the housing 2 in the mounting structure of the present embodiment. FIG. 2 is an exploded perspective view of the mounting structure shown in FIG. FIG. 3 is a schematic diagram showing a cross section of the housing 2 along the left-right direction. FIG. 4 is a bottom view of the housing 2. In addition, each direction of the up-down, front-back, left-right used in the following description is shown in each figure used for description. These top / bottom, front / rear, and left / right are described for explanation, and needless to say, may be different from the actual arrangement.

  As shown in FIGS. 1 and 2, the connector 1 includes a housing 2 and a strain relief 3 that locks the harness 41 connected to the terminal 43 to the housing 2, and the harness 41 connected to the terminal 43. One end of each is housed in the housing 2 together with the terminals 43 and integrated with the hot melt 5.

  As shown in FIG. 2, the harness 41 is welded to a terminal 43 protruding from the lower surface of the welding substrate 42 with a solder 44 on the upper surface of the welding substrate 42. Together with this, the harness assembly 4 is configured. A ferrule 45 having a rectangular tube shape (in this example, a hexagonal tube shape) is attached to the harness 41 with an outer ring.

  As shown in FIGS. 1 to 3, the housing 2 has a cylindrical main body 21 that extends in the vertical direction, and a widened portion 22 that is configured by extending left and right side walls of the main body 21 to the left and right sides. And a locking arm 23 protruding from the front wall of the main body 21 and extending downward.

  A lower wall 211 is provided at the center of the main body 21 in the vertical direction. On the upper surface of the lower wall 211, an adherend portion 21a to which the welding substrate 42 of the harness assembly 4 is attached is formed. From the lower surface of the lower wall 211, the terminal accommodating part 210 provided with the some terminal accommodating chamber 21b exhibits the substantially square block shape, and is extended below.

  Each terminal storage chamber 21 b extends in the terminal storage portion 210 in the vertical direction, and has an upper end opening at the adherend portion 21 a and a lower end opening at the lower surface of the terminal storage portion 210. A terminal to be connected to the terminal 43 is inserted into the terminal storage chamber 21b from the lower end opening.

  The widened portion 22 has a substantially U-shaped planar shape, and includes a pair of storage chambers 22a configured by recessing the inner surface of the left side wall or the right side wall in the front-rear direction. The accommodating chamber 22a is for accommodating the locking tongue piece 32a included in the locking piece 32, and is arranged side by side in the front-rear direction on the inner surface of the widened portion 22. The storage chamber 22 a extends from the center in the vertical direction of the side wall of the widened portion 22 to the lower end.

  The upper wall of the storage chamber 22a is a locking portion 22b to which the locking tongue 32a of the locking piece 32 is locked. As shown in FIG. 4, the lower wall of the widened portion 22 is provided with a communication hole 221 that penetrates the lower wall of the widened portion 22 in the vertical direction and communicates the storage chamber 22 a with the lower portion of the widened portion 22. Yes. A housing port 20 for housing the strain relief 3 and the harness assembly 4 in the housing 2 is constituted by the side walls of the main body 21 and the widened portion 22.

  The strain relief 3 includes a top plate 31 having a substantially square planar shape, a pair of locking pieces 32 extending downward from left and right edges of the top plate 31, and extending downward from the front edge of the top plate 31. The fixing piece 33 includes a pair of receiving pieces 34 extending downward from the rear edge of the top plate 31. By providing an accommodation piece 34 having a different planar shape from the fixing piece 33 at the rear edge of the top plate 31, the orientation of the strain relief 3 can be accurately specified, and an error in assembling the strain relief 3 to the housing 2 can be achieved. Assembling can be prevented.

  An insertion hole 31 a through which the harness 41 of the harness assembly 4 is inserted is provided at the center in the left-right direction of the top plate 31. The insertion hole 31 a penetrates the top plate 31 in the vertical direction, and extends forward from the rear edge of the top plate 31.

  A pair of locking tongue pieces 32a are arranged in the front-rear direction at the center of the locking piece 32 in the vertical direction. The locking tongue 32 a has a configuration in which a part of the locking piece 32 is bent toward the outside of the left or right locking piece 32, and the left or right side from the locking piece 32. Protrudes outward. As shown in FIG. 4, the width in the front-rear direction of the locking tongue 32 a is set to be narrower than the width in the front-rear direction of the communication hole 221.

  As shown in FIG. 2, the accommodation piece 34 extends rearward from the rear edge of the top plate 31 located on the left and right sides of the insertion hole 31 a, and then has a rectangular back shape and extends downward. And has the same length in the vertical direction as the locking piece 32. The fixing piece 33 extends forward from the front edge portion of the top plate 31 and then has a substantially square front shape and extends downward. The fixing piece 33 has substantially the same vertical length as the locking piece 32. is doing. Notches 33 a are provided at the left and right edges of the fixing piece 33, respectively.

  Next, a procedure for assembling the strain relief 3 and the harness assembly 4 to the housing 2 and fixing the harness 41 to the connector 1 will be described.

  5A and 5B are schematic views showing a mounting structure of the harness 41 according to the present embodiment in a cross section along the left-right direction. FIG. 5A is a position where the insertion hole 31a is formed, and FIG. 5B is a position where the fixing piece 33 is formed. A cross section is shown. FIG. 6 is a schematic diagram showing the flow of hot melt 5 supplied into the housing 2 from between the locking piece 32 and the fixing piece 33. FIG. 7 is a schematic diagram illustrating a state in which the movement of the hot melt 5 in the drawing direction of the harness 41 is restricted.

  First, the welding substrate 42 of the harness assembly 4 is inserted into the main body 21 of the housing 2 as indicated by an arrow in FIG. 2, the welding substrate 42 is placed on the adherend portion 21 a of the lower wall 211, and the terminals 43 are connected to the terminals 43. It accommodates in the storage chamber 21b. Next, the harness 41 of the harness assembly 4 is inserted into the insertion hole 31a of the strain relief 3, and the strain relief 3 is moved in the extending direction (downward) of the harness 41 as indicated by an arrow in FIG. Attach to 2. When the strain relief 3 is inserted into the main body 21 from the lower end side, the locking tongue 32 a comes into contact with the inner surface of the left wall or the right wall of the widened portion 22 and bends inward. When the locking tongue piece 32a moves downward to a position facing the locking portion 22b, the locking tongue piece 32a is released from bending and is stored in the storage chamber 22a.

  In this manner, the strain relief 3 and the harness assembly 4 are temporarily assembled to the housing 2. In this state, when a pulling force is applied to the harness 41 of the harness assembly 4 and the welding substrate 42 moves upward, the ferrule 45 that is outer ringed on the harness 41 contacts the lower surface of the top plate 31 positioned at the periphery of the insertion hole 31a. In contact therewith, the movement of the harness 41 above the strain relief 3 is restricted. Further, when the locking tongue 32 a of the locking piece 32 comes into contact with the locking portion 22 b of the housing 2, the movement of the strain relief 3 upward of the housing 2 is restricted, and the ferrule 45 is locked to the top plate 31. The upward movement of the harness assembly 4 is also restricted.

  Next, the hot melt 5 is filled into the housing 2 in which the strain relief 3 and the harness assembly 4 are temporarily assembled. The hot melt 5 enters the housing 2 through the gap between the housing 2 and the strain relief 3 and the insertion hole 31a, and is filled in the housing 2 as shown in FIG. At this time, air in the housing 2 is exhausted from the communication hole 221 of the widened portion 22, and excess hot melt 5 is also discharged from the communication hole 221.

  At the front end portion of the main body 21, the hot melt 5 that has entered the housing 2 from between the left and right sides of the fixing piece 33 and between the main body 21 and between the locking piece 32 and the fixing piece 33 is introduced from the notch 33a. It flows into the adherend 21 a side located behind the fixing piece 33. For example, in the case of including the fixing piece 330 having no notch as in the strain relief 3 shown in FIG. 6A, from between the left and right sides of the fixing piece 33 and the main body 21 as indicated by arrows. A sufficient amount of the hot melt 5 permeates into the housing 2 cannot be obtained. However, when the fixing piece 33 having the notch 33a is provided as shown in FIG. 6B, a sufficient amount of hot melt 5 can be infiltrated into the housing 2 through the notch 33a as shown by the arrow. .

  The hot melt 5 is filled in the housing 2 until it overflows from the upper end of the housing 2 to the upper surface of the top plate 31. When the hot melt 5 filled in the housing 2 is solidified, the strain relief 3 and the harness assembly 4 are integrated with the housing 2, and the connector 1 integrated with the harness 41 is completed.

  In the state where the hot melt 5 is solidified, if the strain relief 3 or the harness assembly 4 tries to move upward of the housing 2 due to an upward pulling force acting on the harness 41, as shown in FIG. However, the upward movement is restricted by the notch 33a. Moreover, as shown in FIG. 7, the location accommodated in the storage chamber 22a in the hot melt 5 is restricted from moving upward by the locking portion 22b. Accordingly, the upward movement of the strain relief 3 and the harness assembly 4 integrated with the hot melt 5 is also restricted.

  As described above, according to the present embodiment, the fixing piece 33 in which the strain relief 3 extends into the housing 2 is embedded in the housing 2 with the hot melt 5 filled in the housing 2, and the harness 41 Since it is integrated with the housing 2 together with the one end portion, the fixing force against the pulling force acting on the harness 41 can be increased, and the harness 41 can be reliably fixed to the housing 2. Further, by filling the housing 2 with the hot melt 5, the connector 1 can be waterproof.

  Moreover, since the fixing force against the pulling force acting on the harness 41 can be increased by the fixing piece 33, the amount of the hot melt 5 used for fixing the strain relief 3 and the harness 41 can be reduced, and the housing 2 can be downsized. Is possible.

  Further, according to the present embodiment, the upper end of the storage port 20 is located between the pair of locking pieces 32 extending along the inner surface of the side wall of the storage port 20 from the top plate 31 covering the storage port 20 of the housing 2. The fixing piece 33 extending in a flat plate shape from the opening along the inner surface of the side wall of the receiving port 20 is provided with a notch 33a on each of a pair of edges extending to the both locking pieces 32 side. For this reason, the hot melt 5 filled in the housing 2 can be circulated through the notch 33a from the gap provided between the locking pieces 32 and the fixing piece 33, and can be evenly distributed in the housing 2. . Therefore, the fixing force by the hot melt 5 is increased, and the harness 41 can be reliably fixed to the housing 2.

  Further, according to the present embodiment, the locking recess 22 a provided on the inner surface of the side wall of the storage port 20 extending along the extending direction of the locking piece 32, that is, the inner surface of the left side wall or the right side wall of the widened portion 22. The strain relief 3 accommodates the engaging member 32a protruding from the locking piece 32, and is engaged with the engaging member 32a by the locking portion 22b. For this reason, the hot melt 5 solidified in the housing 2 can be engaged with the locking portion 22b. Therefore, the fixing force against the pulling force acting on the harness 41 can be increased, and the harness 41 can be reliably fixed to the housing 2.

  Moreover, since the fixing force against the pulling force acting on the harness 41 can be increased by the hot melt 5 solidified in the locking recess 22a, the amount of the hot melt 5 used for fixing the strain relief 3 and the harness 41 can be reduced, The housing 2 can be downsized.

  Further, according to the present embodiment, the locking recess 22a provided on the inner surface of the left side wall or the right side wall of the widened portion 22 extends with a predetermined width along the extending direction of the locking piece 32. The locking tongue piece 32 a included in the locking piece 32 is guided by the locking recess 22 a so that the strain relief 3 can be accurately positioned with respect to the housing 2.

  In the above-described embodiment, the case where the housing 2 includes the widened portions 22 on the left and right side portions has been described. However, the widened portions 22 are not provided, but the left and right side walls of the main body 21 are provided with locking recesses 22a. It may be. Further, the communication hole 221 may be formed in the lower wall 211 of the main body 21 instead of the widened portion 22. Further, the shape of the fixing piece 33 is arbitrary, and a plurality of cutouts 33a may be provided on both the left and right sides, or may be provided only on one side. Further, the fixing piece 33 may be provided with irregularities on the front surface or the rear surface, or may extend downward from the top plate 31 in a spiral shape.

  Further, the insertion hole 31 a is not necessarily provided in the top plate 31. For example, the top plate 31 may not be provided with the insertion hole 31a, and the harness 41 bent backward from the welding substrate 42 may be drawn backward from between the accommodation pieces 34. Moreover, the shape of the accommodation piece 34 is arbitrary as long as the protrusion part of the housing 2 can be accommodated, For example, you may comprise a recessed part in the lower edge of one flat plate.

  The order in which the strain relief 3 and the harness assembly 4 are assembled to the housing 2 is arbitrary. After the harness 41 is inserted into the insertion hole 31a of the strain relief 3, the welding substrate 42 of the harness assembly 4 is placed on the adherend 21a. May be.

DESCRIPTION OF SYMBOLS 1 Connector 2 Housing 21 Main body 21a Adhered part 21b Terminal storage chamber 211 Lower wall 22 Wide part 22a Storage chamber 22b Locking part 221 Communication hole 23 Locking arm 3 Strain relief 31 Top plate 31a Insertion hole 32 Locking piece 32a Locking Tongue piece 33 Fixing piece 33a Notch 34 Insertion piece 4 Harness assembly 41 Harness 42 Welding substrate 43 Terminal 44 Solder 45 Ferrule 5 Hot melt

Claims (4)

A harness assembly configured by connecting a terminal to one end of the harness;
A housing that houses the one end of the harness together with the terminal;
A strain relief received in the housing and locking the harness assembly to the housing;
The strain relief is accommodated in the housing so as to cover the housing, and a fixing member is extended into the housing.
A mounting structure for a harness, wherein the fixing member is embedded in the housing together with the one end portion of the harness with a solidified material filled in the housing, and is integrated with the housing. The strain relief includes a top plate that covers the housing, a pair of locking pieces that are extended from the opposing edges of the top plate along the inner surface of the side wall of the housing and locked to the housing,
The flat plate extends along the inner surface of the side wall of the housing by providing a gap between the locking plate and the edge of the top plate located between the extended edges of the locking piece. The harness mounting structure according to claim 1, further comprising a fixing member.   The housing accommodates a locking member projecting from the locking piece, and has a locking recess for locking the locking member on one side wall extending along the extending direction of the locking piece. The harness mounting structure according to claim 2, wherein the harness mounting structure is provided on an inner surface of the side wall.   The locking recess extends on the inner surface of the side wall of the housing extending along the extending direction of the locking piece with a predetermined width along the extending direction of the locking piece. 3. The harness mounting structure according to 3.

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