JP6305388B2 - Bottom entry connector - Google Patents

Description

  The present invention relates to an electrical connector. In particular, the present invention relates to a bottom entry connector for inserting a connection object such as a pin terminal from the side opposite to the mounting surface of the substrate.

  A bottom entry connector is known as a connector for electrically connecting a connection object to a circuit on a board. This connector is for conducting connection by inserting a connection object, for example, a pin terminal of a pin header, into the housing from the back side opposite to the mounting surface of the board, and a through-hole through which the pin terminal is inserted is formed in the board Has been. In such a bottom entry connector, since the insertion hole of the pin terminal is opened on the bottom surface of the housing, the housing is accurately mounted at a predetermined position on the board, and the insertion hole and the center axis of the pin terminal are not aligned. There is a problem that it is difficult to forcefully insert the pin terminal into the insertion hole.

  In order to eliminate the difficulty of such connection work, it is conceivable to configure the bottom entry connector as a movable connector (see Patent Document 1 as an example). The bottom entry connector includes a fixed housing disposed on the mounting surface of the substrate, and a housing portion for a movable housing that opens toward the through hole of the substrate is formed in the fixed housing. In the housing portion, a movable housing is arranged in a floating state with a movable gap with respect to the inner wall. The movable housing is displaceably supported by a movable piece of a terminal fixed to both the fixed housing and the movable housing. When the insertion hole of the movable housing and the center axis of the pin terminal do not coincide with each other, the movable piece The movable housing is displaced to eliminate the center axis mismatch, and the pin terminal can be inserted without difficulty. If it is a bottom entry connector comprised as such a movable connector, there exists an advantage which can perform the connection operation | work of a connection target object without difficulty.

JP 2014-165066 A

  However, in the above-described bottom entry connector, when the insertion hole and the pin terminal are completely deviated, the pin terminal does not hit the bottom surface of the movable housing and cannot be inserted. Since the movable gap of the movable housing is formed between the fixed housing and the movable housing, the pin terminal that hits the bottom surface of the movable housing may slip and be erroneously inserted into the movable gap. Further, there is a possibility that the pin terminal enters and gets caught in the gap between the movable housing and the through hole of the substrate.

  In order to eliminate such inconvenience, for example, it is conceivable to provide a lead-in portion for the pin terminal having a concave inclined surface on the bottom surface of the movable housing. However, even if the guiding portion is provided, it is limited to the range of the bottom surface of the movable housing, and it is inevitably necessary to enlarge the movable housing in order to increase the guiding portion. However, in this case, in addition to not being able to meet the demand for downsizing of the entire connector, there is a problem that the through-hole of the board becomes large and the board space that can be effectively used is reduced. Moreover, even if the guiding part is formed as large as possible within the range of the bottom surface of the movable housing, it is possible to prevent the pin terminal from being accidentally inserted and bitten between the movable gap or the movable housing and the through hole. Can not.

  The present invention has been made against the background of the prior art as described above. An object of the present invention is to provide a bottom entry connector capable of reliably connecting a connection object.

  In order to achieve the above object, the present invention is configured as follows.

  The present invention includes a first housing disposed on one surface of a substrate, a second housing that is displaceable with respect to the first housing, and a terminal that connects the first housing and the second housing. The second housing is a bottom entry connector having an insertion hole for inserting an object to be connected from the other surface side of the substrate opposite to the one surface. The second housing is a through hole provided in the substrate. It is provided with a projecting portion having a constricted insertion portion that penetrates the hole, and a bulging portion that has a guiding portion of the connection object on the end surface that projects to the other surface and projects with respect to the insertion portion. A bottom entry connector is provided.

  According to the bottom entry connector of the present invention, the second housing has a constricted insertion portion through which the through hole provided in the substrate is inserted, and an insertion guide surface for the connection object on the end surface protruding from the other surface. And a protruding portion having a bulging portion that protrudes with respect to the insertion portion, so that a movable gap of the second housing that is displaced in the direction intersecting the hole axis inside the through hole is secured by the constricted insertion portion. However, a large insertion guide surface can be provided on the bulging portion protruding on the other surface. For this reason, an insertion guide surface having a large opening can be provided in the protruding portion without enlarging the through hole of the substrate and without being restricted by the size of the through hole, so that the connection object can be reliably transferred to the insertion hole. Can be guided and inserted. Further, since the projecting portion can be displaced together with the movable housing and the connection object, the connection object does not interfere with the insertion hole when the movable housing and the connection object are displaced.

The protrusion of the bottom entry connector of the present invention can be formed as a part of the resin molded body of the second housing. In this case, when the bottom entry connector is mounted on the board, it is necessary to insert the protrusion through the through hole of the board. It is difficult to provide a larger insertion guide surface. On the other hand, if the through hole is made larger, the board space that can be effectively utilized is reduced, and the bottom entry connector is also increased in size.
Therefore, the protruding portion of the present invention can be configured as a protruding member attached to the second housing. Since the projecting portion of the second housing is a projecting member that is a separate member from the second housing and can be retrofitted, there is no need to enlarge the through-hole of the substrate and without being restricted by the size of the through-hole. A large insertion guide surface can be formed at the exit portion.

  The protruding member can be configured as a cap body having a mounting portion for the second housing, for example. According to this, after the bottom entry connector is mounted on the board, the projecting member as a cap body can be retrofitted to the second housing from the other surface side of the board, so that there is no restriction on the size of the through hole of the board. The insertion guide surface of the protruding member and the bulging portion can be formed large.

The terminal of the present invention includes a movable piece that supports the second housing so that the second housing can be displaced relative to the first housing, and a contact portion that press-contacts the connection object inside the insertion hole. The contact holding force that presses and contacts the connection object to fix the contact position is larger than the displacement load of the movable piece in which the contact part is displaced with respect to the connection object in the insertion / extraction direction of the connection object. It may be formed.
According to this, even if the second housing is displaced, the contact holding force of the contact portion with respect to the connection object does not lose the displacement load of the movable piece, and the connection object does not shift relative to the contact portion. Therefore, the contact portion continues to maintain the contact position with the connection object without causing a slight slide. Therefore, even if the second housing is displaced, there is an advantage that it is possible to suppress the occurrence of various problems (such as peeling of the plating of the connection object and generation of metal scraps) due to the sliding of the contact portion.

  According to the bottom entry connector of the present invention, the constricted insertion portion secures the movable gap of the second housing that displaces in the direction intersecting the hole axis inside the through-hole, and at the bulging portion protruding to the other surface. Since a large insertion guide surface can be provided, it is possible to secure a large amount of the object to be connected from the back side opposite to the mounting surface of the substrate, and to perform the connection work reliably.

The perspective view containing the front surface, the plane, and the right side surface which show the mounting state of the bottom entry connector of 1st Embodiment. The front view of the bottom entry connector of FIG. The top view of the bottom entry connector of FIG. The bottom view of the bottom entry connector of FIG. The right view of the bottom entry connector of FIG. The AA line expanded sectional view of the bottom entry connector of FIG. The BB line expanded sectional view of the bottom entry connector of FIG. The perspective view of the terminal of the bottom entry connector of FIG. The perspective view containing the front surface, plane, and right side surface which show the mounting state of the bottom entry connector of 2nd Embodiment. The front view of the bottom entry connector of FIG. The top view of the bottom entry connector of FIG. The bottom view of the bottom entry connector of FIG. The right view of the bottom entry connector of FIG. FIG. 10 is an enlarged sectional view taken along line CC of the bottom entry connector of FIG. 9. FIG. 10 is an enlarged sectional view taken along line DD of the bottom entry connector of FIG. 9. The perspective view of the protrusion member of the bottom entry connector of FIG. The front view of the protrusion member of FIG. The top view of the protrusion member of FIG. The right view of the protrusion member of FIG.

  Hereinafter, an embodiment of a bottom entry connector of the present invention will be described with reference to the drawings.

  In the present specification, claims and drawings, the width direction of the bottom entry connector 1 (hereinafter simply referred to as “connector 1”) shown in FIG. 1 is the X direction, the front-rear direction is the Y direction, and the height direction is the Z direction. And Further, the plane in the height direction Z is “upper”, and the bottom is “lower”. Further, in the front-rear direction Y, the front will be described as “front” and the back will be described as “rear”. However, the identification of the top, bottom, and front and rear does not limit the mounting direction and usage direction of the connector of the present invention. In the present embodiment, a pin terminal of a pin header will be described as an example of “an object to be connected”.

First Embodiment [FIGS. 1 to 8]:
The connector 10 includes a fixed housing 11 as a “first housing”, a movable housing 12 as a “second housing”, and a plurality of terminals 13.

  The fixed housing 11 is a synthetic resin molded body formed in a hollow box shape inside. As shown in FIGS. 6 and 7, a storage chamber 11 a is provided inside the fixed housing 11, and a movable housing 12 is disposed. The fixed housing 11 is formed with a fixing portion 11b for press-fitting and attaching the terminal 13 (FIG. 7), and the fixing piece 13a of the terminal 13 shown in FIG. 8 is fixed thereto. Fixing brackets 11c are attached to both side surfaces in the width direction X of the fixed housing 11, and the fixed housing 11 is fixed to the substrate P via the fixing brackets 11c.

  A window portion 11e is formed for each terminal 13 on the upper surface 11d of the fixed housing 11, and the insertion state of the pin terminal T, which is a connection object, can be viewed from the outside through the window portion 11e. Yes. A hole 11 f is also formed in the upper surface 11 d of the fixed housing 11. Below the hole portion 11f, a movable piece 13b of the terminal 13 to be described later is located. The hole portion 11f and the above-described window portion 11e radiate heat generated from the terminal 13 to the outside of the fixed housing 11. Can function as a window. Therefore, the connector 1 can be used for applications in which a large current flows. Between the window part 11e and the hole part 11f, it is a flat surface along the width direction X at a substantially central position in the front-rear direction Y, and this is a part that is sucked by the suction nozzle during automatic mounting. Therefore, the connector 10 of this embodiment corresponds to automatic mounting.

  A movable gap 14 is formed between the fixed housing 11 and the movable housing 12 disposed inside thereof as shown in FIGS. The movable gap 14 is a portion that becomes a space in which the movable housing 12 elastically supported in a floating state by the movable piece 13 b of the terminal 13 can be displaced in the width direction X, the front-rear direction Y, and the height direction Z.

  The movable housing 12 has a housing body 12a and a protruding portion 12b. The housing main body 12a is a portion disposed on the one surface P2 of the substrate P. The protruding portion 12b is a portion protruding from the housing body 12a to the other surface P3 of the substrate P through the through hole P1 of the substrate P.

  As shown in an enlarged view in FIG. 3, the housing body 12a is formed with a terminal holding portion 12d for receiving a fixing portion 12c for fixing the base portion 13c of the terminal 13 and a spring piece 13d extending from the base portion 13c. . The terminal holding portion 12 d is formed as a through hole along the height direction Z, and is formed for each terminal 13. The upper end of the terminal holding portion 12d is opened facing the window portion 11e of the fixed housing 11, and the lower end communicates with the insertion hole 12e of the pin terminal T. The pin terminal T inserted into the terminal holding portion 12d through the insertion hole 12e is in contact with the contact portion 13e of the spring piece 13d located inside the terminal holding portion 12d, as shown by a two-dot chain line in FIG. Press and touch. The adjacent terminal holding portion 12d and the base portion 13c and the spring piece 13d of the terminal 13 accommodated therein are electrically insulated by the partition wall of the housing body 12a.

  Protrusions 12 f are formed on both side surfaces in the width direction X of the housing body 12 a. The projecting portion 12 f faces a contact receiving portion 11 g formed in a step shape inside the fixed housing 11. The contact receiving portion 11g functions as an anti-over that restricts the displacement of the movable housing 11 in the width direction X, the front-rear direction Y, and the height direction Z by the protrusion 12f coming into contact therewith.

  The projecting portion 12b of the movable housing 12 includes a constricted insertion portion 12b1 located inside the through hole P1 and a bulging portion 12b2 projecting from the through hole P1 to the other surface P3. It is formed in an outer size that can be inserted into the through hole P1. A gap XD1 in the width direction X and a gap YD1 in the front-rear direction Y between the insertion portion 12b1 and the through hole P1 are movable gaps of the movable housing 11 with respect to the through hole P1. The movable housing 12 does not come into contact with the hole surface of the through hole P <b> 1 even when the movable housing 12 is displaced in the width direction X and the front-rear direction Y. An insertion hole 12e for the pin terminal T is formed in the projecting portion 12b, the upper end thereof is in communication with the terminal holding portion 12d, and the lower end is in communication with the insertion guide surface 12g. The bulging portion 12b2 is formed so as to protrude in the width direction X and the front-rear direction Y of the connector 10 with respect to the insertion portion 12b1, and both the width direction X and the front-rear direction Y are inserted into the through hole P1. The gaps XD2 and YD2 are smaller than the insertion part 12b1. Therefore, a large insertion guide surface 12g, which will be described later, can be formed on the bulging portion 12b2.

  The insertion guide surface 12g is formed for each insertion hole 12e, and has a size that occupies the entire bottom surface 12h of the movable housing 12 in the width direction X and the front-rear direction Y as shown in FIG. An opening edge 12 i of the insertion guide surface 12 g is formed at a position facing the outer edge of the bottom surface 12 of the movable housing 12. The insertion guide surface 12g is formed as a tapered surface. In this embodiment, it is formed as a quadrangular pyramid hole.

  The terminal 13 includes, in order from the attachment side to the fixed housing 11 to the attachment side to the movable housing 12, a board connection portion 13f that is soldered to one surface P2 of the board P, a fixed piece 13a that is attached to the fixed housing 11, and the movable housing 12. It has a movable piece 13b that is elastically supported, a base portion 13c that is fixed to the movable housing 12, an elastic arm 13d that is a spring piece extending from the base portion 13c, and a contact portion 13e that is in electrical contact with the pin terminal T.

  Here, the characteristics of the connector 10 including the terminals 13 will be described. The contact portion 13e presses and contacts the connection object and exhibits a contact holding force with respect to the pin terminal T. This contact holding force is set larger than the displacement load of the movable piece 13b in which the contact portion 13e is displaced with respect to the pin terminal T in the insertion / extraction direction of the pin terminal T. In other words, the displacement load is set to be larger than the displacement load acting on the movable piece 13b when the maximum displacement amount of the movable piece 13b that becomes the movable limit of the movable housing 12 is reached. That is, while the holding force of the contact portion 13e on the pin terminal T is increased, the displacement load necessary to move the movable piece 13b is small, and the movable housing 12 can be easily displaced. Therefore, even if the movable housing 12 is displaced to the movable limit in the X direction, the Y direction, and the Z direction, the contact portion 13e has a larger holding force than the displacement load of the movable piece 13b, so that the contact portion 13e is in particular against the pin terminal T. Even in the height direction Z that is easy to slip and misalign, the contact portion 13e does not slide slightly with respect to the pin terminal T, and the initial contact position can be maintained. ing.

[Method of mounting connector 10 on board P]
In order to mount the connector 10 as described above on the substrate P, the protruding portion 12b of the movable housing 12 is inserted into the through hole P1 of the substrate P, and the fixed housing 11 is disposed at a predetermined mounting position of the substrate P. When the connector 10 is transferred, automatic mounting is possible with the upper surface 11d of the fixed housing 11 as the suction location. Then, the fixing bracket 11c and the board connecting portion 13f of the terminal 13 are fixed by soldering. Thus, the connector 10 is mounted on the substrate P so that the protruding portion 12c of the movable housing 12 protrudes from the other surface P3 of the substrate P.

[Function and effect of connector 10]
Next, the effect of the connector 10 of this embodiment is demonstrated.

  When the connector 10 and the pin terminal T are connected, the pin terminal T may be inserted into the insertion guide surface 12g of the protruding portion 12b of the movable housing 12. In the case of the connector 10, the pin terminal T can be reliably guided to the insertion hole 12e by guiding the insertion guide surface 12g having a large opening amount with a large opening.

  Such an insertion guide surface 12g can be realized by providing the protruding portion 12b with the bulging portion 12b2. For example, when the size of the lower end side of the movable housing 12 is unchanged in the width direction X and the front-rear direction Y, specifically, when the insertion portion 12b1 of the protruding portion 12b extends to the bottom surface 12h of the movable housing 12 as it is. The insertion guide surface can be provided only within a narrow range of the width and total length of the insertion portion 12b1.

  On the other hand, the connector 10 according to the present invention secures a movable gap of the movable housing 12 that is displaced in the direction intersecting the hole axis inside the through hole P1 by the constricted insertion portion 12b1 on the protruding portion 12b, while the other surface P3. A large insertion guide surface 23d is provided on the bulging portion 12b2 projecting to the right. Accordingly, the size of the housing body 12a is not restricted, the size of the through hole P1 of the substrate P is not restricted, and the space of the substrate P that can be effectively utilized by expanding the through hole P1 is not reduced. It is possible to form the insertion guide surface 12g having a large amount, and even if the pin terminal T is displaced from the position on the extension line of the insertion hole 12e, it can be reliably inserted.

  Further, since the outward bulge by the bulging portion 12b2 is formed as a size that covers the through hole P1, even if the pin terminal T is deflected to the outside of the protruding portion 12b during insertion, It is possible to prevent the bite from being stuck into the gap between the bulging portion 12b2 and the through hole P1.

Second Embodiment [FIGS. 9 to 19]:
The difference between the connector 20 of the present embodiment and the connector 10 of the first embodiment is the configuration of the movable housing 21. Since other configurations and operational effects are the same as those in the first embodiment, a duplicate description is omitted.

  The movable housing 21 of the present embodiment includes a housing main body 22 and a protruding member 23. The protruding member 23 is formed as a resin molded body separate from the housing main body 22, and is configured as a cap body that is attached to the housing main body 22.

  A mounting portion 22 a that protrudes downward is formed at the lower end of the housing body 22. An insertion hole 22b is formed inside the attachment portion 22a. Locking pieces 22c are formed on both side surfaces in the width direction X of the mounting portion 22a.

  The protruding member 23 includes a constricted insertion portion 23a positioned inside the through hole P1 and a bulging portion 23c protruding from the through hole P1 to the other surface P3. The insertion portion 23a is a portion that becomes a mounting portion into which the attachment portion 22a of the housing body 22 is inserted. The gap XD1 in the width direction X and the gap YD1 in the front-rear direction Y between the insertion portion 23a and the through hole P1 are movable gaps of the movable housing 11 with respect to the through hole P1. The insertion portion 23 a is formed with locking holes 23 b on both side surfaces in the width direction X for locking the locking pieces 22 c of the housing body 22. Since the locking piece 22c is locked with the locking hole 23b, the protruding member 23 can be fixed to the housing main body 22.

  On the lower side of the projecting member 23, there is formed a bulging portion 23c projecting with a projecting length XD2 in the width direction X and projecting with a projecting length YD2 in the front-rear direction Y. In the first embodiment, the bulging portion 12b2 of the protruding portion 12b is smaller than the through hole P1 of the substrate P and is sized so that the gaps XD2 and YD2 are formed at the time of insertion, but in the bulging portion 23c of the present embodiment, On the contrary, it protrudes outward from the through hole P1. The bulging portion 23c is formed with an insertion guide surface 23d that is significantly larger in the front-rear direction Y than the insertion guide surface 12g of the first embodiment.

[Method of mounting connector 20 on substrate P]
In order to mount the connector 20 on the board P, the fixed housing 11 is disposed at a predetermined mounting position of the board P without attaching the protruding member 23 to the housing body 22 of the movable housing 21, and the board of the fixing bracket 11 c and the terminal 13. The connecting portion 13f is fixed by soldering. Thereafter, the protruding member 23 is prepared, and the attachment portion 22a of the housing main body 22 located inside the through hole P1 is inserted into the insertion portion 23a of the protruding member 23. Then, the locking piece 22c of the housing body 22 is locked and locked with respect to the locking hole 23b of the protruding member 23, so that the protruding member 23 is fixed to the movable housing 21 and integrated. Thus, the connector 20 is mounted on the substrate P.

[Function and effect of connector 20]
Next, the effect of the connector 20 of this embodiment is demonstrated.

  The insertion guide surface 23d of the present embodiment has a larger opening than the insertion guide surface 12g of the first embodiment, and the amount of invitation is greatly increased. Since the protruding portion 12b of the first embodiment is a part of the molded body of the movable housing 12, it is necessary to insert the through hole P1 of the substrate P. Therefore, the protruding portion 12b is not naturally limited by the size of the through hole P1. I won't.

  However, the projecting member 23 of the present embodiment is a cap body and can be retrofitted to the movable housing 21, and may be attached to the housing body 22 after the connector 20 is mounted on the board P. A large insertion guide surface 23d is provided on the bulging portion 23c protruding from the other surface P3 while securing the movable gap of the movable housing 21 that is displaced in the direction intersecting the hole axis inside the through hole P1 by the constricted insertion portion 23a. be able to. Therefore, according to the connector 20, the space of the board P that can be effectively used by further expanding the through-hole P1 without reducing the through-hole P1 of the board P and without being restricted by the size of the through-hole P1 is reduced. Even if the pin terminal T is displaced from the position on the extension line of the insertion hole 22b by the insertion guide surface 23d having a large guiding amount, it can be reliably inserted.

  Further, the bulging portion 23c protrudes greatly in the width direction X and the front-rear direction Y with respect to the through hole P1, and is formed in a size that can completely cover the through hole P1 on the other surface P3 side. Therefore, even if the pin terminal T is deflected to the outside of the protruding member 22 at the time of insertion, there is no possibility that the pin terminal T is stuck in the gap between the protruding member 22 and the through hole P1. In particular, in this embodiment, even if the movable housing 21 is displaced maximum in the width direction X and the front-rear direction Y, the bulging portion 23c is formed with a size that covers the through hole P1, so that the pin terminal T is positioned. Even if the movable housing 21 is displaced and is in the maximum displaced state, the pin terminal T is not detached as described above, and is not stuck in the gap.

Variation of the embodiment:
In the connector 10 of the first embodiment, the example in which the protruding portion 12b of the movable housing 12 is formed smaller in the width direction X and the front-rear direction Y than the through hole P1 of the substrate P is shown. However, the protrusion 12b can be formed larger than the through hole P1. In this case, what is necessary is just to insert the through-hole P1 in the state which made the protrusion part 12 slant.

10 Connector (first embodiment)
DESCRIPTION OF SYMBOLS 11 Fixed housing 11a Accommodating chamber 11b Fixed part 11c Fixed metal fitting 11d Upper surface 11e Window part 11f Hole part 11g Contact receiving part 12 Movable housing 12a Housing main body 12b Protruding part 12b1 Insertion part 12b2 Expansion part 12c Fixed part 12d Terminal holding part 12e Insertion Hole 12f Projection part 12g Insertion guide surface 12h Bottom surface 13 Terminal 13a Fixed piece 13b Movable piece 13c Base part 13d Spring piece 13e Contact part 13f Board connection part 14 Movable gap 20 Connector (second embodiment)
21 movable housing 22 housing body 22a mounting portion 22b insertion hole 22c locking piece 23 protruding member 23a insertion portion 23b locking hole 23c bulging portion 23d insertion guide surface P substrate P1 through hole P2 one side P3 other side T pin terminal

Claims (4)

A first housing disposed on one side of the substrate;
One second housing displaceable with respect to the first housing;
A terminal connecting the first housing and the second housing;
In the bottom entry connector, the second housing has an insertion hole for inserting a pin-like connection object from the other surface side of the substrate opposite to the one surface.
The terminal is
A fixing piece for fixing to the first housing;
A base fixed to the second housing on the one surface side;
A movable piece connecting the fixed piece and the base,
An elastic arm extending from the base on the one side;
It has a contact portion that is connected to the elastic arm on the one surface side and is in electrical contact with the pin-shaped connection object,
The second housing is
A housing body having a terminal holding portion for accommodating the elastic arm and the contact portion on the one surface side;
A protrusion that is provided integrally with the housing main body and protrudes from the housing main body to the other surface of the substrate through a through-hole provided in the substrate;
The insertion hole for inserting the pin-shaped connection object extending along the hole axial direction of the through hole has an outer peripheral surface located inside the through hole between the through hole and the insertion hole. An insertion part formed in a constricted shape so as to form a gap which becomes a movable gap of the second housing;
It has an insertion guide surface of the pin-shaped connection object communicating with the insertion hole on an end surface protruding on the other surface, and has a bulging portion protruding with respect to the insertion portion. Bottom entry connector.
The bottom entry connector according to claim 1, wherein the protruding portion is a protruding member attached to the second housing.
The bottom entry connector according to claim 1, wherein the bulging portion is formed to have a size that covers the through hole from the other surface side.
The said bulging part is formed in the magnitude | size which covers the said through-hole by the said other surface side in the state which the said insertion part displaced to the hole axis crossing direction of the said through-hole. The bottom entry connector according to any one of claims.

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