JP6271248B2 - Rear holder - Google Patents

Description

  The present invention relates to a rear holder that is attached to a wire lead-out portion of a connector housing that houses connector terminals.

  2. Description of the Related Art A connector structure including a rear holder that is attached to the back of a connector housing that houses connector terminals connected to the ends of the wires (the side from which the wires are drawn out from the connector housing) is known (see Patent Document 1). The rear holder closes the opening of the wire lead-out portion of the connector housing and holds the electric wire so that a force applied when the electric wire is bent does not reach the inside of the connector housing. And if it is a waterproof connector as disclosed by patent document 1, drop-off prevention of sealing members, such as a rubber plug attached to the circumference | surroundings of an electric wire, will be achieved with a rear holder. On the other hand, in the case of a non-waterproof connector, it is not necessary to attach a sealing member around the electric wire, but foreign matter (for example, a wire or wire) to the inside of the connector housing (especially the live area where the connector terminal is electrically connected to the mating terminal) Measures are required to prevent the intrusion of a metal wire or the like with a rear holder.

JP 2011-54393 A

  As one of such foreign matter intrusion prevention measures, it is conceivable to provide a protrusion (rib) in the rear holder for eliminating a gap between the outer periphery of the electric wire. As a result, the rib can be brought into contact with the outer peripheral portion of the electric wire at normal times, so that foreign matter can be prevented from entering.

  However, when a wire is bent (bent or bent) when the wire is wired or when the wire is vibrated, the rib may be separated from the outer periphery of the wire depending on the degree, and a gap may be generated between them. When the generated gap passes to the inside of the connector housing, there is a possibility that foreign matter may enter the connector housing through the gap. Therefore, it is necessary to surely prevent entry of foreign matter with the rear holder even when the wire is bent.

  The present invention has been made on the basis of this, and the problem to be solved is to provide a rear holder capable of reliably preventing the intrusion of foreign matter even when wire bending occurs. is there.

  In order to solve the above-described problems, a connector according to the present invention is a cylindrical shape that is attached to a wire lead-out portion of a connector housing that houses a connector terminal connected to a terminal of a wire and holds a wire drawn from the wire lead-out portion. An electric wire holding portion; and a crowned portion formed continuously to the electric wire holding portion and crowned by an opening of the electric wire lead-out portion, wherein the electric wire holding portion and the crowned portion are cylinders of the electric wire holding portion. It is formed by dividing into two divided bodies along the axial direction, and the wire holding portion has a plurality of protrusions that protrude from the inner peripheral portion along the circumferential direction and can come into contact with the outer peripheral portion of the electric wire. The protruding portion creates a gap that communicates linearly to the inside of the connector housing between the wire holding portion and the outer periphery of the wire even when the wire is bent in the wire holding portion. Leave a gap in the cylinder axis direction Characterized in that it is.

  According to this, in the state where the electric wire holding part is held without bending (bending, bending, etc.) in the electric wire, not only all the protrusions are brought into contact with the outer peripheral part of the electric wire, but the electric wire is, for example, the electric wire holding part. Even if some of the protrusions are separated from the outer periphery of the electric wire in a bent state, it is possible to keep at least one of the remaining protrusions in contact with the outer periphery of the electric wire. Therefore, it is not necessary to generate a gap (communication gap) that communicates linearly to the inside of the connector housing between the electric wire holding portion and the outer peripheral portion of the electric wire, so that it is possible to prevent a wire such as a foreign object from slipping through.

  In this case, the protrusions of the electric wire holding portions of the two divided bodies can be formed by shifting the positions in the cylinder axis direction from the protrusions of the electric wire holding portion of the counterpart divided body. As a result, the positions of the protruding portions of the two divided bodies that come into contact with the outer peripheral portion of the electric wire are displaced in the cylinder axis direction, so that when the two divided bodies are assembled to attach the rear holder, the protruding portions act on the outer peripheral portion of the electric wire. The tightening force (pressing force) can be dispersed and suppressed. That is, since it is not necessary to tighten the electric wire excessively during the mounting operation, the mounting workability of the rear holder can be improved.

  Moreover, you may form the protrusion part of the electric wire holding | maintenance part of each division body by varying the protrusion height from the said inner peripheral part. For example, when the wire is bent in the wire holding part, the bending degree increases as it goes in the drawing direction of the electric wire. It is possible to more reliably prevent the communication gap from being generated when the electric wire is bent. In addition, for example, if the protrusions of the wire holding portions of each divided body are formed with staggered different protrusion heights, the electric wires can be positioned so as to sew between these protrusions, so that the electric wires may wave at the wire holding portions. The protruding portion can be brought into contact with the outer periphery of the electric wire in a state where the wire is bent. Therefore, even if the electric wires have different diameters within the tolerance range, it is possible to reliably contact the outer peripheral portion of the electric wire with the protrusion and fill the communication gap by changing the degree of bending (waving) in the electric wire holding portion. it can.

  According to the present invention, it is possible to realize a rear holder that can surely prevent entry of foreign matter even when electric wire bending occurs.

It is a perspective view which shows the state which mounted | wore the wire holder of the connector housing with the rear holder which concerns on one Embodiment of this invention. It is a perspective view which shows the state which mounted | wore the electric wire extraction part of the connector housing with the rear holder which concerns on one Embodiment of this invention from the direction different from FIG. It is a perspective view which shows the structure of the rear holder which concerns on one Embodiment of this invention before attaching to the electric wire extraction part of a connector housing. It is sectional drawing which shows typically the structure of the protrusion part formed in the electric wire holding part of each division body by changing protrusion height, Comprising: (a) does not produce bending in an electric wire, but all protrusion parts The figure which shows the state which has contacted the electric wire outer peripheral part, (b) is a figure which shows the contact state of the protrusion part and electric wire outer peripheral part at the time of an electric wire bending occurring in an electric wire holding part. It is sectional drawing which shows typically another structure of the protrusion part formed in the electric wire holding part of each division body by varying protrusion height, Comprising: (a) is a wire, and all protrusions do not produce bending The figure which shows the state which a part is contacting with the electric wire outer peripheral part, (b) is a figure which shows the contact state of the protrusion part and electric wire outer peripheral part at the time of an electric wire bending occurring in an electric wire holding part. It is a perspective view which shows the structure of the electric wire extraction part of a connector housing.

  Hereinafter, a rear holder according to an embodiment of the present invention will be described with reference to the accompanying drawings. The rear holder is a member that is attached to the wire lead-out portion of the connector housing that accommodates the connector terminal connected to the terminal of the wire. In this embodiment, in addition to holding the wire drawn from the wire lead-out portion, It is installed for the purpose of preventing foreign matter from entering inside. In the present embodiment, for example, a connector used in a high-voltage electric system in an electric vehicle, a hybrid vehicle, or the like, such as a wire or a metal wire (metal thin wire) in a non-waterproof connector that does not have a sealing member such as a rubber plug. Although the case where a rear holder is used in order to prevent intrusion of foreign matter is assumed, the use is not limited to this.

  1-3, the structure of the rear holder 2 which concerns on this embodiment is shown. 1 and 2 are perspective views showing a state in which the rear holder 2 is mounted on the wire lead-out portion 11 of the connector housing 10. FIG. 3 is a perspective view showing a state before the rear holder 2 is mounted on the wire lead-out portion 11. In the following description, the arrow X direction shown in FIG. 1 is the left-right direction, the arrow Y direction is the front-rear direction, and the arrow Z direction is the up-down direction. Among these, in the front-rear direction, the arrow Y1 direction in FIG. 1 is the front side (front), and the arrow Y2 direction is the rear side (rear). However, the left-right direction, the front-rear direction, and the up-down direction do not necessarily match the actual directions at the time of implementation.

  As shown in FIGS. 1 to 3, the rear holder 2 is formed to be connected to the tubular wire holding portion 3 that holds the wire drawn from the wire drawing portion 11 of the connector housing 10, and the wire holding portion 3, and to be a wire drawing portion. 11 and a crowned portion 4 to be crowned in the opening 12 (see FIG. 6). The wire lead-out portion 11 of the connector housing 10 is opened rearward (see FIG. 6), and a connector terminal (not shown) connected to the end of the wire is accommodated in the connector housing 10 from the opening 12. . And the electric wire connected to the accommodated connector terminal is pulled out rearward from the electric wire extraction part 11 via the rear holder 2. On the other hand, the front of the connector housing 10 is opened so that the connector terminal faces the connection counterpart terminal, and the terminals are electrically connected.

  The electric wire holding part 3 and the crowned part 4 are divided into two divided bodies 5 (appropriately, the electric wire holding parts 3a and 3b and the crowned parts 4a and 4b, divided parts) along the cylinder axis direction (front-rear direction) of the electric wire holding part 3. 5a and 5b). In the present embodiment, the two divided bodies 5 are connected inseparably by a connecting portion (hereinafter referred to as a hinge) 6 formed integrally with the same material (for example, a resin material). Thereby, the fall of the portability of rear holder 2 and complication of parts management are prevented. Moreover, in this embodiment, the two division bodies 5 are connected by the one end part of the left-right direction, and can be opened and closed by the hinge 6 as a fulcrum in the up-down direction. The two divided bodies 5 are assembled by engaging the locking portions (locking claws) 51 and 53 at both ends with the locked portions (locking holes) 52 and 54, respectively, so as to keep the closed state. It has become. It should be noted that the two divided bodies 5 are not connected to each other and are separated from each other, and when the rear holder 2 is attached to the wire lead-out portion 11 of the connector housing 10, for example, it is integrally assembled by screwing or band fastening. Can also be envisaged.

  The electric wire holding part 3 of the two divided bodies 5 has a concave curved surface 31 along the outer periphery of the electric wire, and the concave curved surfaces 31 are oriented in the same direction in the vertical direction before the two divided bodies 5 are assembled. (For example, upward). When the two divided bodies 5 are assembled, the concave curved surfaces 31 are opposed to each other to form a columnar cavity (hereinafter referred to as an electric wire holding space), and the electric wires drawn out from the electric wire drawing portion 11 are the electric wires. It is held in the holding space.

  The electric wire holding part 3 has a plurality of ridge parts (hereinafter referred to as ribs) 32 that protrude along the circumferential direction from a concave curved surface 31 that is an inner peripheral part. These ribs 32 are held in the wire holding part 3 without bending (bending, bending, etc.) of the electric wire during wiring or vibration of the electric wire (the electric wire is substantially concentric with the electric wire holding space). In a state of being positioned in a straight line), both are formed so as to come into contact with the outer periphery of the electric wire. In this case, if the rib 32 is formed so that the outer peripheral portion of the electric wire having the smallest diameter within the tolerance range and the protruding tip can be contacted, the rib 32 is arranged in the electric wire holding space within the electric wire tolerance range. It is possible to reliably prevent the wire or the like assumed as a foreign object from slipping through the rib 32 (which is the concavely curved surface 31) and the outer periphery of the electric wire. In addition, in FIG. 3, although the electric wire holding | maintenance part 3 has shown as an example the structure which has the two ribs 32 of the same form, it is good also as a structure which has three or more ribs. Further, in the present embodiment, the rib 32 has a cross-sectional shape as an example, and the ridge line is a convex curved shape. However, for example, a semicircular shape, a semi-elliptical shape, a rectangular shape, a trapezoidal shape, or a triangular shape may be used. Absent.

  In addition, these ribs 32 are linear to the inside of the connector housing 10 between the electric wire holding part 3 and the outer periphery of the electric wire even when the electric wire holding part 3 is bent (bent or bent). Are arranged at intervals in the cylinder axis direction (front-rear direction) that do not cause a gap communicating with the cylinder (hereinafter referred to as a communication gap). In this case, for example, even if some of the ribs 32 are separated from the outer periphery of the electric wire in a state where the electric wire is bent in the electric wire holding portion 3, at least one of the remaining ribs 32 is in contact with the outer peripheral portion of the electric wire. To prevent the occurrence of a communication gap. At that time, if the ribs 32 adjacent to each other in the front-rear direction are brought too close to each other, a communication gap is generated. Therefore, the ribs 32 are arranged at appropriate intervals according to the diameter of the electric wire and the degree of force applied to the electric wire. . Thereby, even if it is a case where an electric wire bending arises, since a communication gap is not produced, it can prevent slipping of a wire etc.

  In the present embodiment, as shown in FIG. 3, ribs 32 a and 32 b are formed in the electric wire holding portions 3 a and 3 b of the two divided bodies 5, respectively. In the electric wire holding part 3a of the divided body 5a, two ribs 32a continuous along the concave curved surface 31 forming a semicircular surface are arranged side by side in the cylinder axis direction, and the electric wire holding of the divided body 5b. In the portion 3b, two ribs 32b continuous along the concave curved surface 31 having a semicircular surface shape are connected to the two ribs 32a at the same interval with the ribs 32a at the front and rear in the cylinder axis direction. They are arranged side by side. That is, these ribs 32a and 32b are continuous so as to go around the inner peripheral portion of the wire holding portion 3 and protrude toward the wire holding space.

  Here, an example of the mounting method of the rear holder 2 with respect to the electric wire extraction part 11 of the connector housing 10 is demonstrated. When attaching the rear holder 2 to the wire lead-out portion 11, first, the crowned portion 4 a of one divided body 5 (for example, the divided body 5 a) is positioned below the opening 12 side end portion of the wire lead-out portion 11. In that case, the concave curved surface 31 of the electric wire holding part 3a is made to follow the outer peripheral part of the electric wire pulled out from the electric wire extraction part 11 outside. From this state, a force is applied to turn the other divided body 5 (for example, the divided body 5b) around the hinge 6 so that the concave curved surface 31 of the electric wire holding portion 3b is along the outer peripheral portion of the electric wire. The split body 5b is moved so as to face the concave curved surface 31 of the electric wire holding portion 3a with the electric wire interposed therebetween, and the crown portion 4b is overlapped on the crown portion 4a. Then, by engaging the locking portions (locking claws) 51 and 53 with the locked portions (locking holes) 52 and 54 respectively and assembling these divided bodies 5a and 5b, the crowned portion 4 is opened. 12 to be crowned. At the same time, the crowned crowned portion 4 is engaged with the latched portion (locking claw) 13 of the wire lead-out portion 11 in the latched portion (locking hole) 41, so that it is prevented from coming off from the wire lead-out portion 11. Figured. In this way, the crowned portion 4 is crowned and the locked portion 41 is engaged, so that the rear holder 2 is mounted on the wire lead-out portion 11.

  Thereby, when the divided bodies 5a and 5b are assembled, the concave curved surfaces 31 of the electric wire holding portions 3a and 3b can be opposed to each other so that the electric wire holding space is formed, and thus, for example, the electric wire drawing portion 11 of the connector housing 10 Before the wire is sandwiched between the wire holding portions 3a and 3b of the two divided bodies 5a and 5b and tightened between the ribs 32a and 32b, and then the divided bodies 5a and 5b are advanced along the electric wires to be crowned. It is not necessary that the portions 4a and 4b are simultaneously crowned on the opening 12 of the wire lead-out portion 11. Therefore, the rib 32 can be raised to a protruding height at which it can come into contact with the outer peripheral portion of the electric wire having the smallest diameter in the tolerance range, and it is possible to more reliably prevent the communication gap from being generated. As a result, for example, it is possible to prevent intrusion of an extremely thin wire having an IP code protection grade of about class 4 (wire diameter 1 mm). Even when the protruding height of the rib 32 is in such a state, the ribs 32a and 32b do not come into contact with the outer periphery of the electric wire until the divided bodies 5a and 5b are assembled. The tightening force (pressing force) applied to the outer periphery of the electric wire can be suppressed as compared with the case where the mounting operation of the rear holder is performed in a state of being tightened between.

  The present invention has been described based on the embodiment shown in FIGS. 1 to 3. However, the embodiment described above is merely an example of the present invention, and the present invention is only the configuration of the embodiment described above. It is not limited to. Therefore, it is obvious to those skilled in the art that the present invention can be implemented in a form modified or changed within the scope of the gist of the present invention. It goes without saying that it belongs to the claims.

  In the present embodiment described above, the ribs 32a and 32b are made continuous so as to go around the inner peripheral part of the wire holding part 3, but the ribs do not have to be continuous in this way, for example, FIG. 4 and FIG. Like the ribs 33 and 34 shown in FIG. 5, the positions in the cylinder axis direction (corresponding to the left and right direction in the same figure) are shifted from the ribs 33 and 34 of the wire holding part 3 of the counterpart divided body 5. May be. As a result, the positions of the ribs 33 and 34 in contact with the outer periphery of the electric wire are shifted in the front-rear direction. Therefore, when assembling the two divided bodies 5a and 5b to mount the rear holder 2, the ribs 33 and 34 are only semicircular. The tightening force (pressing force) applied to the outer periphery of the electric wire can be dispersed and suppressed without contacting the outer periphery of the electric wire. That is, since it is not necessary to tighten the electric wire excessively during the mounting operation, it is possible to improve the mounting workability of the rear holder 2, and it is possible to prevent the electric wire from being damaged during the mounting operation and even after the mounting.

  Moreover, in this embodiment mentioned above, although the protrusion height from the inner peripheral part (concave curved surface 31) of the electric wire holding | maintenance part 3 is made the same with all the ribs 32, this protrusion height is the same with all the ribs 32. There is no need. For example, as shown in FIG. 4, the ribs 33 of the electric wire holding part 3 of each divided body 5 may be formed with different protruding heights from the inner peripheral part (concave surface 31) of the electric wire holding part 3. In FIG. 4, the protruding height of the left ribs 331 and 333 is larger than the right ribs 332 and 334 with the left direction in the figure as the rear. FIG. 4A shows an example of a state where all the ribs 33 are in contact with the outer peripheral portion of the electric wire 1 without bending the electric wire 1 having the maximum diameter within the tolerance range. In this case, at least the rib 33 with the larger protruding height (left ribs 331 and 333 in FIG. 4A) is formed so as to be able to contact the outer peripheral portion of the electric wire having the smallest diameter within the tolerance range.

  On the other hand, when the electric wire bends in the electric wire holding part 3 (in other words, the electric wire holding space), the force acting on the electric wire 1 is larger on the rear side than on the front side, so the degree of bending is shown in FIG. ), The rear side becomes larger than the front side (that is, the rib 33 is easily separated from the outer periphery of the electric wire when the electric wire is bent). Accordingly, if the rib 33 on the rear side of the electric wire holding space (the front side in the drawing direction of the electric wire 1) is formed to have a larger protruding height, a communication gap is more reliably generated when the electric wire is bent. Can be prevented. FIG. 4B shows an example of a contact state between the outer peripheral portion of the electric wire having the smallest diameter within the tolerance range and the rib 33. In this case, the rib 331 and the rib 333, and the rib 332 and the rib 334 have the same protruding height, but the protruding height of the rib 331 is smaller than the rib 333, and the protruding height of the rib 332 is higher than the rib 334. You can make it smaller.

  Or as shown, for example in FIG. 5, you may form the rib 34 of the electric wire holding | maintenance part 3 of each division | segmentation body 5 by different protrusion height alternately. In FIG. 5, the protruding height of the ribs 342 and 343 is made larger than the ribs 341 and 344 with the left direction in the figure as the rear. That is, the projecting height of the rearmost rib 343 is made larger than that of the adjacent rib 341, and the ribs 344 and 342 are arranged so that the projecting heights are staggered toward the front thereafter. FIG. 5A shows an example of a state in which all the ribs 34 are in contact with the outer peripheral portion of the electric wire 1 without bending the electric wire 1 having the maximum diameter within the tolerance range. In this case, as in the case of the rib 33 shown in FIG. 4, at least the rib 34 having the larger protruding height (the ribs 342 and 343 in FIG. 5A) is the outer peripheral portion of the wire having the smallest diameter within the tolerance range. It is formed so that it can come into contact with.

  On the other hand, when the electric wire is bent in the electric wire holding part 3 (in other words, the electric wire holding space), for example, the electric wire 1 can be positioned so as to sew between the ribs 34 as shown in FIG. The rib 34 can be brought into contact with the outer peripheral portion of the electric wire in a state where the electric wire 1 is bent so as to wave in the holding portion 3 (electric wire holding space). Therefore, even if the electric wires have different diameters within the tolerance range, the outer peripheral portion of the electric wire can be reliably brought into contact with the ribs 34 and the communication gap can be filled by changing the degree of bending (undulation) in the electric wire holding space. . That is, if the electric wire 1 has a diameter within the tolerance range, it is possible to more reliably prevent entry of foreign matter without causing a communication gap. FIG. 5B shows an example of a contact state between the outer peripheral portion of the electric wire having the smallest diameter within the tolerance range and the rib 34.

2 Rear holder 3 (3a, 3b) Electric wire holding part 4 (4a, 4b) Crowned part 5 (5a, 5b) Divided body 6 Connecting part (hinge)
DESCRIPTION OF SYMBOLS 10 Connector housing 11 Electrical wire extraction part 12 Opening 32 (32a, 32b) Projection part (rib)

Claims (2)

A cylindrical wire holding portion that is attached to a wire drawing portion of a connector housing that accommodates a connector terminal connected to the terminal of the wire and holds the wire drawn from the wire drawing portion, and is formed continuously to the wire holding portion. And a crowned portion to be crowned by the opening of the wire lead-out portion, and the wire holding portion and the crowned portion are formed by dividing into two divided bodies along the cylinder axis direction of the wire holding portion. A rear holder,
The electric wire holding part has a plurality of protrusions that protrude along the circumferential direction from the inner peripheral part and can come into contact with the outer peripheral part of the electric wire,
The protrusion does not generate a gap that communicates linearly to the inside of the connector housing between the wire holding portion and the outer periphery of the wire even when the wire is bent in the wire holding portion. It is arranged with an interval in the cylinder axis direction ,
The rear holder , wherein the protruding portion of the electric wire holding portion of each divided body is formed with different protruding heights from the inner peripheral portion .   The protrusions of the electric wire holding part of the two divided bodies are formed so as to be shifted from the protrusions of the electric wire holding part of the counterpart divided body with respect to each other with respect to the cylindrical axis direction. The rear holder of the electric wire according to 1.

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