JP2019079715A - Termination branch connector and communication network - Google Patents

Abstract

To provide a termination branch connector and the like that are good in workability of attaching a termination resistor.SOLUTION: A termination branch connector includes: a first housing portion 10 having a distribution route portion 11 in which two electric wires W1 constituting a twisted pair wire are arranged in a twisted shape in which the distance between them is increased; and a second housing portion 20 in which a termination pressure-contact terminal with termination resistor connected to a ground wire W3 is fixed and the termination pressure-contact terminal is pressure-contact connected with the two electric wires W1 in the state of being assembled to the first housing 10.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a termination branch connector connected to the ends of two wires forming a twisted pair wire, and a communication network using the same.

  When the two wires constituting the twisted pair are used as the trunk of the communication circuit, a termination resistor is attached to the end of the wire (trunk) to prevent a reflected wave of the signal (see Patent Documents 1 and 2). ). In the past, the end coating of the electric wire (main line) was peeled off to attach a terminal resistance.

JP, 2014-141140, A JP 2002-151169 A

  However, in the conventional example, since it is necessary to perform the work of attaching the termination resistance while maintaining the twist shape of the two wires, there is a possibility that the communication quality may not be maintained and the attachment workability of the termination resistance is poor. there were.

  Therefore, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a termination branch connector having a good attachment workability of the termination resistance and a communication network using the same.

  In the present invention, the two wires constituting the twisted pair wire maintain the twist shape, and connect the ground wire with the first housing having the distribution route portion arranged by widening the distance between the two wires, and the ground wire. In the state in which the termination pressure-welding terminal with termination resistor is fixed and assembled to the first housing, the termination pressure-welding terminal comprises a second housing portion for pressure-welding connection to two electric wires. Termination branch connector.

  According to the present invention, although the two electric wires can be spaced apart from each other, they can be installed with the twist shape maintained, so that the termination resistance can be attached while maintaining the communication quality. In addition, since the termination resistance can be attached by mounting the second housing portion to the first housing portion, the attachment workability of the termination resistance is good.

FIG. 2 shows the first embodiment of the present invention, and is an exploded perspective view of a termination branch connector. FIG. 1 shows a first embodiment of the present invention, and is an overall perspective view of a termination branch connector. The 1st Embodiment of this invention is shown, (a) is the A1-A1 line sectional view of FIG. 2, (b) is the A2-A2 line sectional view of FIG. 2, (c) is the BB sectional view of FIG. FIG. The 1st Embodiment of this invention is shown, (a) is the perspective view which looked at the inner surface side of a 1st housing part, (b) is sectional drawing of the housing part for terminal fixation in alignment with CC line of FIG. . The 1st Embodiment of this invention is shown, (a) is the perspective view which looked at the inner surface side of the housing part for combination of the 2nd housing, (b) looked at the outer surface side of the housing part for combination of the 2nd housing part. It is a perspective view. It is a top view of a state which shows a 1st embodiment of the present invention, and arranges two 1st electric wires to a 1st housing part. It is a perspective view which shows 1st Embodiment of this invention, and shows the state before the uniting housing part is united with a 1st housing part. It is a perspective view which shows 1st Embodiment of this invention, and shows the state before fitting the housing part for terminal fixations to the housing part for combination. It is sectional drawing which shows 1st Embodiment of this invention, and shows the state before fitting the housing part for terminal fixation to the housing part for combination. FIG. 1 shows a first embodiment of the present invention, and is a block diagram of a communication network. The 2nd Embodiment of this invention is shown and it is a whole perspective view of the branch connector for termination. FIG. 12 is a cross-sectional view showing a second embodiment of the present invention, along an E-E line in FIG. 11, before fitting the first housing portion to the second housing portion. FIG. 12 is a cross-sectional view showing a second embodiment of the present invention, and a state in which the first housing portion is fitted to the second housing portion along the line E-E in FIG. 11. FIG. 10 shows a first modification of the first embodiment of the present invention, and is a perspective view of a termination branch connector. FIG. 10 shows a second modification of the first embodiment of the present invention, and is a schematic perspective view of a termination branch connector. It is a principal part top view of the pressure welding terminal for termination | terminus which concerns on a modification.

  Hereinafter, embodiments of the present invention will be described based on the drawings.

First Embodiment
1 to 10 show a first embodiment of the present invention. As shown in FIG. 10, the communication network 1 is mounted on a vehicle. The communication network 1 includes a trunk w1, a plurality of branch lines w2 branched at a plurality of points of the trunk w1, a plurality of ECUs (electronic control units) 2 respectively connected to the branch w2, and both ends of the trunk w1. And two termination resistors 3 connected. Each ECU 2 carries a CAN interface (not shown). Each ECU 2 transmits and receives signals by CAN communication (controller area network).

  The trunk wire w1 uses two first electric wires W1 constituting a twisted pair wire. The two first electric wires W1 are arranged in a substantially closely-contacted twisted shape. The branch wire w2 uses two second electric wires W2 which similarly constitute a twisted pair wire. The two second electric wires W2 are arranged in a substantially closely-contacted twist shape. The termination resistor portion 3 is configured of the termination branch connector 5C. The termination branch connector 5C will be described below.

  As shown in FIGS. 1 to 5, the termination branch connector 5C includes a first housing portion 10 which is arranged to pass through two first electric wires (electric wires) W1 constituting a twisted pair wire, and an earth wire W3. And a second housing portion 20 to which a single terminal pressure welding terminal 60 connected is fixed.

  The first housing portion 10 has a substantially rectangular plate shape. The first housing portion 10 has a distribution path portion 11. The distribution path portion 11 has a twist groove 12 and three ribs 13a and 13b erected at intervals in the distribution direction of the first electric wire W1. The twist groove 12 is formed in a groove having a shape in which two first electric wires W1 follow a twist shape in which the two first electric wires W1 are separated from each other. The three ribs 13a and 13b are disposed substantially at an interval of twist pitch P of the two first electric wires W1.

  The central rib 13a has a rhombus shape as viewed from above. A central position at which both side surfaces of the central rib 13a are most separated is a pressure contact position of a pair of pressure contact terminals 50 described below. The ribs 13b on both sides are in the shape of an isosceles triangle when viewed from above.

  In the distribution path portion 11, the three ribs 13 a and 13 b respectively intervene between the two first electric wires W 1, thereby opening the two first electric wires W 1 while maintaining the twist shape and opening the mutual space. The twist groove 12 is arranged in a twist shape. The two first electric wires W1 arranged in the twist groove 12 are drawn out of the both ends of the twist groove 12 to the outside of the first housing portion 10, respectively. The twist pitch of the two first electric wires W1 in the distribution path portion 11 is substantially the same as the twist pitch P of the two first electric wires W1 other than the distribution path portion 11.

  The distribution path portion 11 is provided with a pair of press contact blade guide grooves 14 which are continuous from the top surface of the central rib 13 a to the bottom surfaces of the twist grooves 12. Each press-contacting blade guide groove 14 is formed to have a width substantially the same as the thickness of the press-contacting blade 52 or a slightly wider dimension.

  A pair of locking claws 15 is provided in a protruding manner on both side surfaces of the first housing portion 10.

  The second housing portion 20 is a separate body from the combination housing portion 21 assembled to the first housing portion 10 and the combination housing portion 21, and is used for terminal fixing to which a single terminal pressure welding terminal 60 is fixed. And a housing portion 31C.

  The combining housing portion 21 has an upper surface wall 22 formed to have a size slightly larger than that of the first housing portion 10, and four side walls 23a and 23b hanging from the entire peripheral edge of the upper surface wall 22. On the inner surface of the upper surface wall 22, a projecting wall 24 having a shape that follows the shape of the twist groove 12 (a shape that follows the twist shape in which the two first electric wires W1 are spread apart from each other) is provided. The projecting wall 24 enters the twist groove 12 in a state of being assembled to the first housing portion 10. A positioning recess 24 a is provided in the upper surface wall 22 by being surrounded by the projecting wall 24. A pair of positioning holes 22 a is formed at both ends of the upper surface wall 22. The upper surface wall 22 is formed with a pair of press contact blades 25.

  The four side walls 23 a and 23 b are disposed at positions covering all the side surfaces of the first housing portion 10 in a state of being assembled to the first housing portion 10. A pair of electric wire insertion grooves 26 are respectively formed in the pair of side walls 23a orthogonal to the wiring direction of the first electric wire W1. A rib 27 is provided between the pair of wire insertion grooves 26 of both side walls 23a. Each rib 27 with the ribs 13 b at both ends of the first housing portion 10 cuts between the two first electric wires W 1 in a state of being assembled to the first housing portion 10.

  A pair of elastic locking frames 28 is provided on a pair of side walls 23 b extending along the same direction as the routing direction of the first electric wire W1. The pair of elastic locking frames 28 is locked to the locking claws 15 of the first housing portion 10, whereby the combination housing portion 21 of the first housing portion 10 and the second housing portion 20 is assembled.

  The combination housing portion 21 has a connector fitting portion 29 on the upper surface of the upper surface wall 22. Inside the connector fitting portion 29, a pair of press contact blade access holes 25 are opened. A pair of elastic locking frames 30 is provided on the fitting inlet side of the connector fitting portion 29. The terminal fixing housing portion 31C is fitted into the connector fitting portion 29.

  The terminal fixing housing portion 31C has two split connector housing portions 32A and 32B. A pair of locking claws 39a is provided on the front side of the split connector housing portion 32A. The two split connector housing portions 32A and 32B each have an elastic locking frame 40 on one side and a locking claw 41 on the other side. The two split connector housing portions 32A and 32B are united with each other by the locking hook (not shown) being locked to the elastic locking frame 40. A terminal storage chamber 35A and an electric wire lead-out passage 35a are formed inside by combining the divided connector housing portions 32A and 32B.

  As shown in FIGS. 3A and 4B, the split connector housing portions 32A and 32B are provided with positioning convex portions 32c and positioning concave portions 32d of the terminal pressure contact terminals 60 disposed in the terminal accommodation chamber 35A. It is done. The electric wire lead-out passage 35a is formed in a passage bent by the recess 32e of the split connector housing portion 32A and the projection 32f of the split connector housing portion 3B.

  The terminal pressure contact terminal 60 is disposed in the terminal storage chamber 35A. The terminal pressure welding terminal 60 has a single pressure welding blade 61 for pressure connection of the ground wire W3, a pair of pressure welding blades 62 for pressure connection to the two first electric wires W1, two termination resistors 63, and a single unit. A capacitor 64 is provided. That is, the termination resistor 63 is integrally attached to the termination pressure contact terminal 60. The termination resistor 63 is a chip resistor.

  The press-fit holes 65 are provided at a plurality of locations in the pressure-contact terminal 60 for termination. The boss portion 32g of the divided connector housing portion 32A is press-fit into the press-fit hole 65. The terminal pressure-contact terminal 60 is disposed in a state of being positioned in the terminal accommodating chamber 35A by press-fitting of the boss portion 32g of the press-fitting hole 65.

  The pair of press contact blades 62 of the terminal press contact terminal 60 project outside. The ground wire W3 connected to the terminal pressure welding terminal 60 is drawn to the outside from the side opposite to the pressure welding blade 62 through the wire drawing passage 35a.

  Next, an assembling procedure of the termination branch connector 5C will be described. The vicinity of one end (near the end of the trunk line) of the two first electric wires W1 constituting the twisted pair wire is inserted into the twist groove 12 of the first housing portion 10. The insertion into the twist groove 12 can be easily performed by inserting the ribs 13a and 13b into three places between the two first electric wires W1 in such a manner that the ribs 13a and 13b are inserted. As shown in FIG. 6, the two first electric wires W1 inserted in the twist groove 12 are arranged in a twisted shape in which the distance between the two first electric wires W1 is increased.

  Next, as shown in FIG. 7, the uniting housing portion 21 of the second housing portion 20 is united with the first housing portion 10. That is, the uniting housing portion 21 of the second housing portion 20 is covered with the first housing portion 10, and the elastic locking frame 30 of the uniting housing portion 21 is locked to the locking claw 15 of the first housing portion 10. As a result, the protruding wall 24 of the combination housing portion 21 enters the twist groove 12 of the first housing portion 10, and the first electric wires W 1 are positioned in the twist groove 12.

  Further, the tip end side of the central rib 13 a enters the positioning recess 24 a of the unit housing portion 21. The pair of ribs 13 b at both ends enter the pair of positioning recesses 24 a of the unit housing portion 21. As a result, the first housing portion 10 and the uniting housing portion 21 and, consequently, the second housing portion 20 are united in the positioned state.

  Before or after the combining operation of the first housing portion 10 and the second housing portion 20 with the combining housing portion 21, an operation of connecting the terminal for press-connecting terminal 60 to the ground wire W 3; The terminal press-fit terminal 60 is assembled to the terminal fixing housing portion 31C.

  The work of connecting the terminal end press contact terminal 60 to the ground wire W3 is completed by press-connecting the end portion of the ground wire W3 to the press contact blade 61 of the terminal end press contact terminal 60.

  The boss work 32g of the split connector housing 32A is press-fit into the press-fit hole 65 of the press-fit terminal 60 for termination, as shown in FIG. 3 (a), 9). Thus, the terminal pressure contact 60 is fixed to the divided connector housing portion 32A. Next, as shown in FIG. 4B, the split connector housing portions 32A and 32B are brought together while the ground wire W3 is disposed in the wire lead-out passage 35a.

  Next, as shown in FIGS. 8 and 9, the terminal fixing housing portion 31C is fitted to the connector fitting portion 29 of the unitary housing portion 21. That is, the terminal fixing housing portion 31C is inserted into the connector fitting portion 29 of the combination housing portion 21, and the elastic locking frame 30 of the connector fitting portion 29 is engaged with the locking claw 39a of the terminal fixing housing portion 31C. Stop. In the fitting process, the pair of press contact blades 62 of the terminal press contact terminal 60 enter the twist groove 12 while being guided by the press contact blade guide groove 14. In the fitting completion state, each press contact blade 62 of the terminal press contact terminal 60 is press-connected to each first electric wire W1.

  Similarly, the termination branch connector 5C is attached to the other ends (ends of the trunk w1) of the two first electric wires W1 constituting the twisted pair wire.

  As described above, the termination branch connector 5C includes the first housing portion 11 having the distribution path portion 11 in which the two first electric wires W1 constituting the twisted pair wire are arranged in a twisted shape in which the distance between the two is broken. In a state where the termination pressure contact terminal 60 with the termination resistance 63 connected to the ground wire W3 is fixed and assembled to the first housing portion 10, the termination pressure contact terminals 60 are two first electric wires W1. And a second housing portion 20 connected in pressure contact.

  Therefore, the distance between the two first electric wires W1 is increased, but the twisted shape is maintained, and the termination resistance 63 can be attached while maintaining the communication quality. In addition, since the termination resistor 63 can be attached by mounting the second housing part 20 to the first housing part 10, the attachment workability of the termination resistance 63 is good.

  The distribution path portion 11 has ribs 13a and 13b which intervene between the two first electric wires W1. Therefore, the space between the two first electric wires W1 can be easily extended.

  The combined housing portion 21 of the second housing portion 20 has a projecting wall 24 which enters the twist groove 12 in a state of being assembled to the first housing portion 10. Therefore, the first electric wire W1 can be reliably positioned in the twist groove 12, which contributes to maintaining the communication quality. In particular, in this embodiment, the protruding wall 24 has a shape that follows the shape of the twist groove 12 (a shape in which the two first electric wires W1 follow the twist shape in which the distance between the two first electric wires W1 is increased). Reliable positioning can be performed over the range.

  The second housing portion 20 is assembled to the first housing portion 10, and the combination housing portion 21 having the connector fitting portion 29 and the pair of pressure contact terminals 50 are fixed and fitted to the connector fitting portion 29. And a terminal fixing housing portion 31C.

  Therefore, the terminal branch connector 5C can perform the mounting operation of the terminal resistor 63 by the same operation as the male-female connector connection. An operation of assembling the first housing unit 10 and the combining housing unit 21 to the trunk line w1 (main line w1 side operation), and a fitting operation for fitting the terminal fixing housing unit 31 connected to the branch wire w2 to the combining housing unit 21 Since the work (the work of connecting the branch line w2 to the trunk line w1) can be performed separately, the degree of freedom of work is improved.

  In the two first electric wires W1 constituting the twisted pair wire, the ribs 13a and 13b are interposed between the first electric wires W1 at three locations, and the pressure welding blade 52 is pressure connected at the position of the rib 13a at the center thereof. . Therefore, even if the tensile force of the two first electric wires W1 acts on the branch connector 5A, the tensile force of the first electric wire W1 does not act directly on the pressure-welding connection portion by the pressure-welding blade 52, so the reliability of the pressure-welding connection is high. .

  The communication network 1 includes two first electric wires W1 forming a twisted pair, two second electric wires W2 forming a twisted pair, and two first electric wires W1 and two second electric wires W2. And a termination branch connector 5C having the above-described configuration. Therefore, in the termination branch connector 5C, the distance between the two first electric wires W1 can be increased, but the twist shape is maintained in the termination branch connector 5C. As mentioned above, the communication network 1 which branched the twisted pair line is obtained, maintaining communication quality.

Second Embodiment
11 to 13 show a second embodiment of the present invention. The communication network 1 has the same configuration as that of the first embodiment (see FIG. 10). In the communication network 1, a branch connector for termination (branch connection structure) 5D is used for branching of the twisted pair wire.

  The termination branch connector 5D of the second embodiment is different from that of the first embodiment in that the second housing portion 20 is formed of a single housing.

  That is, in the second housing portion 20, the combination housing portion 21 assembled to the first housing portion 10 and the terminal fixing housing portion 31C to which the pair of press-connecting terminals 50 are fixed are integrally formed. Since they are integrally formed in this manner, the locking claw and the elastic locking frame for locking between the combination housing portion 21 and the terminal fixing housing portion 31C are not provided.

  The other configuration is the same as that of the first embodiment, so the same reference numerals are given to the same components and the description will be omitted.

  Next, an assembling procedure of the termination branch connector 5D will be described. One end (end of the trunk line) of the two first electric wires W1 constituting the twisted pair wire is inserted into the twist groove 12 of the first housing portion 10 as described in the first embodiment.

  Next, in the same manner as described in the first embodiment, the work of connecting the terminal terminal 60 to the ground wire W3 and the work of attaching the terminal terminal 60 to the terminal fixing housing part 31C of the second housing part 20 I do.

  Next, the unitary housing portion 21 of the second housing portion 20 is united with the first housing portion 10 in the same manner as described in the first embodiment. As a result, the protruding wall 24 of the combination housing portion 21 enters the twist groove 12 of the first housing portion 10, and the first electric wires W 1 are positioned in the twist groove 12.

  In this combining process, the press contact blades 62 of the terminal press contact terminal 60 enter the twist grooves 12 while being guided by the press contact blade guide grooves 14. In the fitting completion state, each press contact blade 62 of the terminal press contact terminal 60 is press-connected to each first electric wire W1.

  Even in the termination branch connector 5D of the second embodiment, the distance between the two first electric wires W1 can be increased in the termination branch connector 5D for the same reason as in the first embodiment, but the twist shape is used. Therefore, the termination resistor 63 can be attached while maintaining the communication quality.

  The second housing portion 20 is formed integrally with the combination housing portion 21 to be assembled to the first housing portion 10 and the terminal fixing housing portion 31C to which the terminal pressure welding terminal 60 is fixed. Since there is no need to perform the fitting work between the housing 21 for housing and the housing 31C for terminal fixing, assembling workability of the branch connector for termination 5D is better than in the first embodiment. Further, the termination branch connector 5D of the second embodiment can reduce the number of parts, reduce the weight, etc., as compared with the first embodiment.

  The communication network 1 includes a termination branch connector 5D having the above-described configuration, which connects between two first electric wires W1 and the ground wire W3. Therefore, for the same reason as the first embodiment, the communication network 1 in which the twisted pair is branched while maintaining the communication quality can be obtained.

First Modified Example of First Embodiment
FIG. 14 shows a first modification of the first embodiment. The termination branch connector 5C of the first modification is different from the first embodiment in the configuration of the terminal fixing housing portion 31A. That is, the terminal fixing housing portion 31A of the first modified example is configured to pull out the second electric wire W2 in the direction orthogonal to the fitting direction of the connector fitting portion 29. In the first modification, when the routing path of the ground wire W3 is parallel to the first electric wire W1, the ground wire W3 can be drawn out smoothly in a desired routing direction.

  The other configuration is the same as that of the first embodiment. The same reference numerals as in the first embodiment denote the same parts as in the first embodiment, and a description thereof will be omitted.

  This first modification can also be applied to the termination branch connector 5B of the second embodiment.

Second Modified Example of First Embodiment
FIG. 15 shows a second modification of the first embodiment. As compared with the first embodiment, the terminal branch connector 5 </ b> C of the second modification is provided with a fastening band 43 in the combination housing portion 21. The terminal branch connector 5C can be fixed to the electric wire (main line) W of the wire harness by the fastening band 43. The termination branch connector 5C can be fixed to a member other than the electric wire (main line) W.

  The other configuration is the same as that of the first embodiment. The same reference numerals as in the first embodiment denote the same parts as in the first embodiment, and a description thereof will be omitted.

  The second modified example is also applicable to the termination branch connector 5B of the second embodiment.

(Other modifications)
In each embodiment, although the termination | terminus resistance 63 is integrally attached to the pressure welding terminal 60 for termination | terminus, you may attach separately.

  In each embodiment, the termination resistor 63 is a chip resistor. However, as shown in FIG. 16, the termination resistor 63 may be formed by thinning a part of the termination pressure-welding terminal 60. That is, you may form using a part of pressure welding terminal 60 for terminations.

  In each embodiment, although the two first electric wires W1 constituting the twisted pair wire have a configuration in which the ribs 13a and 13b are interposed at three locations, the number of ribs may be one, two, four or more. good.

  In each embodiment, the distribution path portion 11 is formed by the twist groove 12 and the ribs 13a and 13b, but the two first electric wires W1 may be arranged in a twisted shape in which the distance between the first electric wires W1 is increased. Just do it. For example, the distribution path portion 11 may have only the twist groove 12 or may have only the rib 13a.

  In each embodiment, although the routing path portion 11 has the twist groove 12, a pair of side walls according to a twist shape in which the two first electric wires W1 are spread apart from each other are erected in the first housing portion 10 It may be formed. The pair of side walls may be intermittent side walls instead of continuous side walls.

  In each embodiment, the protruding wall 24 has a shape that follows the shape of the twist groove 12 (a shape in which the two first electric wires W1 follow the twist shape in which the distance between the two first electric wires W1 is increased). A plurality of projecting walls may be inserted.

Reference Signs List 1 communication network W1 first electric wire W2 second electric wire 5C, 5D branch connector for termination 10 first housing portion 11 routing path portion 12 twist groove 13a, 13b rib 20 second housing portion 21 combination housing portion 24 projecting wall 29 connector Fitting section 31C, 31A Terminal fixing housing section 60 Terminal pressure welding terminal 62 Pressure welding blade 63 Terminal resistance

Claims (7)

A first housing portion having a distribution route portion in which two electric wires constituting the twisted pair wire are arranged in a twisted shape in which the distance between the wires is extended;
A second housing part in which the terminal terminal for pressure welding is connected by pressure to the two wires when the terminal pressure contact terminal with terminal resistance connected to the ground wire is fixed and assembled to the first housing part. And a termination connector for termination. The termination branch connector according to claim 1, wherein
The termination branch connector, wherein the routing path portion has a twist groove following a twist-shaped outer contour. The termination branch connector according to claim 1 or 2, wherein
The termination branch connector, wherein the routing path portion has a rib that cuts into between the two wires. The termination branch connector according to claim 3, wherein
The terminal branching connector according to claim 1, wherein the second housing portion has a projecting wall which enters the twist groove in a state of being assembled to the first housing portion. The termination branch connector according to any one of claims 1 to 4, wherein
The second housing portion is assembled to the first housing portion, and the combination housing portion having a connector fitting portion and the two pressure-welding terminals are fixed and the terminal fixing portion is fitted to the connector fitting portion. A termination branching connector comprising: a housing portion. The termination branch connector according to any one of claims 1 to 4, wherein
The second housing portion is characterized in that a combination housing portion assembled to the first housing portion and a terminal fixing housing portion to which two of the pressure contact terminals are fixed are integrally formed. Termination branch connector. Two first electric wires constituting a twisted pair wire,
Two second electric wires which are branch-connected to the two first electric wires and which constitute a twisted pair wire;
7. The termination branch connector according to claim 1, further comprising: a terminal branch connector according to any one of claims 1 to 6, which is connected to a position to be an end of a trunk line among the two first electric wires and the two second electric wires. Communication network.

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