JP2006185851A - Terminal structure of connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a terminal structure of a connector capable of preventing crack or peeling at a soldered part. <P>SOLUTION: The terminal 4 is structured by bridging a housing 2 and a block 3 of the connector, with the block 3 in floating supported by the housing 2. The terminal 4 is provided with a block fixing part 4a fixed to the block 4, a housing fixed part 4d fixed to the housing 2, a displacement absorbing part 4e intercalated between these fixing parts 4a, 4d elastically deforming for supporting the block 3 in floating to the housing 2, a pedestal part 4f formed in tying the displacement absorbing part 4e and the housing fixing part 4d, and a tail part 4g formed in tying the pedestal part 4f and soldered and fixed to a circuit board 1k. A bridge part 4h, formed between the tail part 4g and the pedestal part 4f to tie them, is formed thinner or narrower than either the pedestal part 4f, the housing fixing part 4d, or the tail part 4g, and is weaker and softer. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a terminal structure of a connector (plug, socket), and more particularly to a terminal structure of a connector having a floating function that absorbs a shift between axial centers of a plug and a socket.

  1 and 2 show a board-to-board connector 1 (socket) with a floating function similar to that previously proposed by the present applicant (Japanese Patent Application No. 2004-218403). The socket 1 includes a housing 2 formed in a frame shape, a block 3 disposed inside the housing 2 with a predetermined gap therebetween, and the housing 2 and the block 3. The block 3 is attached to the housing 2. And a terminal 4 ′ for floating support. When the plug 5 shown in FIGS. 3 and 4 is fitted to the socket 1, if the shaft core 1a of the socket 1 and the shaft core 5a of the plug 5 are misaligned as shown in FIG. These terminals 4 'are absorbed by elastic deformation. That is, the terminal 4 ′ has both a function as a terminal for passing a current and an elastic support function for floatingly supporting the block 3 with respect to the housing 2.

  As shown in FIG. 2, the terminal 4 ′ includes a block fixing portion 4 a that is press-fitted into a groove 6 formed in the block 3, a common portion 4 b that is provided below the block fixing portion 4 a, and an upper side from the common portion 4 b. A contact portion 4c that is formed to extend to contact with a terminal 7 of the plug 5 (see FIG. 5), a housing fixing portion 4d that is press-fitted into a groove 12 formed in the housing 2, and the fixing portions 4a and 4d. A displacement absorbing portion 4e that is interposed between and elastically deforms to support the block 3 in a floating manner with respect to the housing 2, and is connected to the lower portions of the displacement absorbing portion 4e and the housing fixing portion 4d, and the displacement absorbing portion 4e is elastically deformed. And a tail portion 4g which is formed to be connected to the side portion of the base portion 4f and is fixed to the circuit board 1k by soldering. The displacement absorbing portion 4e is formed in an upside down elongated U-shape. As shown in FIG. 6, the block fixing portion 4a receives a horizontal force F based on the above-mentioned displacement, and the common portion 4b is in the horizontal direction. When it moves to the left, it is easily elastically deformed as shown by the phantom line.

  Therefore, as shown in FIG. 2, when the tail part 4g is fixed to the circuit board 1k by soldering, the housing 2 is fixed to the board 1k via the tail part 4g, and the block 3 connects the terminal 4 'to the housing 2. It will be supported floating through.

  On the other hand, as shown in FIGS. 3 and 4, the plug 5 includes a housing 8 formed in an elongated box shape with an open top, and a plurality of terminals 7 attached to the housing 8. The terminal 7 includes a housing fixing portion 7a that is press-fitted into a groove 9 formed in the housing 8, a tail portion 7b that extends laterally from the lower end of the fixing portion 7a and is fixed to the circuit board 5k by soldering, A contact portion 7c extending upward from the fixed portion 7a and contacting the contact portion 4c of the socket 1 is provided.

  As shown in FIG. 5, when the board 5k on which the plug 5 is mounted and the board 1k on which the socket 1 is mounted are brought close to each other and the plug 5 is fitted into the socket 1, the housing 2 and the block 3 of the socket 1 are connected. The housing 8 of the plug 5 is inserted into the gap, and the contact portion 7 c of the terminal 7 of the plug 5 is brought into contact with the contact portion 4 c of the terminal 4 ′ of the socket 1. Here, when the relative position between the board 5k on the plug 5 side and the board 1k on the socket 1 side is shifted in the left-right direction (horizontal direction), the shaft core 5a of the plug 5 and the shaft core 1a of the socket 1 are shifted. However, since this displacement is absorbed by the elastic deformation of the displacement absorbing portion 4e of the terminal 4 'of the socket 1 as described above, the fitting between the socket 1 and the plug 5 can be performed without any problem.

  Note that connectors described in Patent Documents 1 and 2 are known as connectors having a floating function.

JP-A-6-325825 JP-A-9-306613

  By the way, when the displacement absorbing portion 4e is elastically deformed, the socket 1 and the plug 5 can surely be fitted, but as shown in FIG. 6, the force for moving the common portion 4b due to the displacement to the left is shown. However, it is transmitted to the base part 4f through the displacement absorbing part 4e, and a force is generated to move the base part 4f to the left. For this reason, a shearing stress is generated in the solder portion 10 that fixes the tail portion 4g to the substrate 1k, and a bending moment M is generated around the solder portion 10, and the solder portion 10 is cracked or the tail portion 4g is attached to the substrate 1k. There is a risk of peeling off.

  To elaborate on this point, for example, as shown in FIG. 5, when the plug 5 is fitted to the socket 1 while being shifted to the left, the plug 5 presses the block 3 of the socket 1 to the left. As shown in FIG. 6, the block fixing part 4a, the common part 4b, and the contact part 4c of the terminal 4 ′ are moved to the left as indicated by phantom lines, and the right side portion 4er of the displacement absorbing part 4e is indicated by phantom lines. Elastically deforms and tilts to the left. Note that FIG. 6 is exaggerated slightly to help understanding. Thus, when the displacement absorbing portion 4e is elastically deformed, a restoring force that pushes it back acts in the opposite direction to the force F, and at the same time, the restoring force rotates the left portion 4el of the displacement absorbing portion 4e clockwise about its upper end. The reaction force to be applied is applied to the base portion 4f.

  This reaction force concentrates on the inner part 4gi of the tail part 4g and acts as a shearing force on the solder part 10 in the vicinity thereof, causing cracks there, or causing the base part 4f to act on the inner part 4gi as a center. It acts as a moment M to rotate in the clockwise direction and works to separate the tail portion 4g from the substrate 1k, which may cause a poor electrical connection between the terminal 4 ′ and the substrate 1k.

  The present invention has been made in view of this point, and an object of the present invention is to provide a connector terminal structure capable of preventing cracks and peeling of the solder portion.

  The present invention devised to achieve the above object is a structure of a terminal which is provided across a housing and a block of a connector and supports the block in a floating manner with respect to the housing, wherein the terminal includes the block. A block fixing portion fixed to the housing, a housing fixing portion fixed to the housing, a displacement absorbing portion interposed between the fixing portions and elastically deformed to support the block floating with respect to the housing, A base part connected to the displacement absorbing part and the housing fixing part; and a tail part connected to the base part and soldered to a circuit board. The tail part and the base A bridge portion that connects them to each other, and the bridge portion is thinner or wider than the base portion, the housing fixing portion, and the tail portion. It is narrower, but soft and weak than these.

  It is preferable that one end of the bridge portion is connected to the upper portion of the side surface of the base portion, and the other end is connected to the upper surface of the tail portion.

  The bridge part may be formed by providing a lightening part obtained by scooping a part of the bridge part between the base part and the tail part.

  According to the present invention, since the force transmitted from the base portion to the tail portion is dispersed and absorbed by the deformation of the bridge portion, it is possible to prevent the solder portion from cracking and peeling.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings.

  FIG. 7 is an explanatory diagram of the terminal 4 according to the present embodiment. This terminal 4 (signal terminal) is applied to the socket 1 of the connector shown in FIGS. 1 and 2 similarly to the terminal 4 ′ described with reference to FIG. Support floating.

  The terminal 4 in FIG. 7 according to the present embodiment includes a block fixing portion 4a, a common portion 4b, a contact portion 4c, and a displacement absorbing portion 4e having the same shape and function as the terminal 4 ′ in FIG. Manufactured by the method. The block fixing portion 4 a is press-fitted into the groove 6 of the block 3 to fix the terminal 4 to the block 3, and the contact portion 4 c is received in the groove 11 of the block 3 and contacts the terminal 7 of the plug 5. The lower portion of the right portion 4er of the displacement absorbing portion 4e formed in an inverted U shape is connected to the left portion of the common portion 4b.

  A base portion 4f is connected to the lower portion of the left portion 4el of the displacement absorbing portion 4e. A housing fixing portion 4d that is press-fitted into the groove 12 of the housing 2 is formed on the upper surface of the base portion 4f so as to extend upward. The housing fixing portion 4 d is for fixing the terminal 4 to the housing 2. A tail portion 4g is connected to the left side surface of the base portion 4f via a bridge portion 4h. The tail portion 4g is fixed to the circuit board 1k by soldering, and fixes the terminal 4 to the board 1k. Thus, the housing 2 is fixed to the substrate 1k via the bridge portion 4h and the tail portion 4g, and the block 3 is floatingly supported by the housing 2 via the displacement absorbing portion 4e (see FIG. 2).

  The feature of this embodiment is that the bridge portion 4h formed between the base portion 4f and the tail portion 4g is softer than the base portion 4f, the housing fixing portion 4d, and the tail portion 4g, and the displacement absorbing portion 4e. When a reaction force (a slightly leftward horizontal force on the left side) is applied to the base portion 4f, the bridge portion 4h is deformed to absorb and disperse the reaction force. This is to prevent cracking and peeling. This point will be described in detail below.

  As shown in FIG. 7, the bridge portion 4h has a shape such that a portion that connects the base portion 4f and the tail portion 4g is provided with a cutout portion 4i that is partially cut out in a triangular shape from below. One end 4ha is connected to the upper part of the side surface of the base part 4f, the other end 4hb is connected to the upper surface of the tail part 4g, and the base part 4f and the tail part 4g are obliquely bridged. ing.

  Thereby, when the force is transmitted from the base part 4f to the tail part 4g via the bridge part 4h, the height difference between the one end 4ha which is the input point of the bridge part 4h and the other end 4hb which is the output point is set. As well as earning, you can earn the length of the bridge 4h itself. Since the bridge portion 4h has such a shape in addition to being soft, it is easily deformed by the above force.

  The bridge portion 4h is made softer than the base portion 4f, the housing fixing portion 4d, and the tail portion 4g by making the plate thickness thinner or making the plate width narrower (thinner). In the present embodiment, the plate width is narrower than that of other portions. Further, in order to reduce the plate thickness, the pressing force is increased by slightly protruding the portion that presses the bridge portion 4h of the die for punching out the terminal 4, or the bridge portion 4h of the workpiece (terminal 4) with the die. Do this by increasing the number of times you hit the corresponding part. Note that the reduction of the plate thickness and the reduction of the plate width may be performed simultaneously.

  Further, both side surfaces of the lower portion of the tail portion 4g are formed in a tapered shape so as to be squeezed downward, and the inner portion 4gi is formed obliquely, so that the contact area of the solder forming the solder portion 10 is increased. I earn.

  The terminal 4 located on the left side of FIG. 2 has been described above. However, since the terminal 4 on the right side is also formed symmetrically (inverted horizontally), it can operate in exactly the same way.

  The operation of this embodiment will be described.

  As shown in FIG. 5, when the plug 5 is fitted to the socket 1 having the terminal 4 described above, the relative position between the plug 5 side substrate 5k and the socket 1 side substrate 1k is shifted in the left-right direction. If so, the block 3 of the socket 1 is pushed leftward by the plug 5. Then, as shown in FIG. 7, the block fixing portion 4a, the common portion 4b, and the contact portion 4c of the terminal 4 are moved to the left as shown by phantom lines (FIG. 7 is drawn slightly exaggerated to help understanding). The displacement absorbing portion 4e is elastically deformed to absorb the above-described misalignment, so that the socket 1 and the plug 5 can be fitted with no problem. The displacement absorbing portion 4e of the right terminal 4 is similarly elastically deformed (however, the deformation direction is the reverse direction).

  In FIG. 7, when the displacement absorbing portion 4e is elastically deformed, a restoring force is generated that pushes back the displacement absorbing portion 4e. At the same time, the restoring force is counterclockwise when the left side portion 4el of the displacement absorbing portion 4e tries to rotate clockwise around the upper end. The force is applied to the base portion 4f as force, and the base portion 4f is moved slightly diagonally upward to the left in the horizontal direction. This reaction force is transmitted to the tail part 4g via the bridge part 4h. Since the bridge part 4h is softer (less rigid) than the other parts excluding the displacement absorbing part 4e, it is deformed (elastically deformed) by the above force. ) And disperse / absorb this reaction force. Therefore, the stress of the tail portion 4g due to the reaction force is reduced, and it is possible to prevent the solder portion 10 from being cracked or peeled off.

  That is, in the terminal 4 ′ of FIG. 6, the force applied to the base portion 4f is transmitted almost directly to the tail portion 4g, so that it is concentrated on the inner portion 4gi of the tail portion 4g and is applied to the solder portion 10 in the vicinity thereof. Acts as a shearing force to cause cracks there, or acts as a moment M to rotate the base part 4f counterclockwise around the inner part 4gi, and acts to peel the tail part 4g from the substrate 1k. However, in the terminal 4 of the present embodiment shown in FIG. 7, the above-described softness between the base portion 4f and the tail portion 4g is weak. Since the bridge portion 4h is formed, the bridge portion 4h is deformed to absorb and disperse the force, the stress of the solder portion 10 is reduced, and cracking / peeling of the solder portion 10 can be prevented.

  Here, when the force (substantially horizontal left force) is transmitted from the base portion 4f to the tail portion 4g via the bridge portion 4h, the bridge portion 4h is input to the bridge portion 4h as described above. Since the height difference between the point (one end 4ha) and the output point (the other end 4hb) is earned, and the length of the bridge portion 4h itself is earned, it is easily coupled with the above force by the above force. Deform. Therefore, the above force can be absorbed and dispersed efficiently. Accordingly, the above force is appropriately distributed to the outer portion 4go without concentrating on the inner portion 4gi of the tail portion 4g, and the stress of the inner portion 4gi is reduced, resulting in a shearing force that causes the solder portion 10 to crack. In addition, the moment M that causes the solder part 10 to peel off is reduced, and cracking and peeling of the solder part 10 can be prevented.

  Modified examples of the bridge portion 4h are shown in FIGS.

  FIG. 8A is the one shown in FIG. 6 (comparative). FIG. 8 (b) shows that a hollow portion 4i1 is formed in the inner portion of the connecting portion 4j that connects the proportional base portion 4f and the tail portion 4g, and a part of the portion is removed leftward in the horizontal direction. Thus, the bridge portion 4h1 is formed. FIG. 8 (c) shows a case in which a thinned portion 4i2 is formed in the proportional connecting portion 4j, and a portion thereof is removed in the vertical direction, and a bridge portion 4h2 is formed by the remaining portion. In FIG. 8D, a thinned portion 4i3 is formed in the corner inner portion of the proportional connecting portion 4j, and a part thereof is cut out vertically upward and horizontally leftward, and a bridge portion 4h3 is formed by the remaining portion. Is.

  FIG. 9 (a) shows a case in which a hollow portion 4i4 is formed in the lower portion of the outer portion of the above-described proportional connection portion 4j, and a bridge portion 4h4 is formed by the remaining portion. is there. FIG. 9 (b) shows a case in which a thinned portion 4i5 is formed in the upper portion of the outer portion of the comparative connecting portion 4j, and a portion thereof is cut out vertically downward, and a bridge portion 4h5 is formed by the remaining portion. . FIG. 9 (c) shows a case in which a hollow portion 4i6 is formed in the middle portion of the outer portion of the above-described proportional connection portion 4j, and a bridge portion 4h6 is formed by the remaining portion. is there.

  These modified examples shown in FIGS. 8 and 9 also have the same effects as those shown in FIG. 7 described above.

  Moreover, although each above embodiment demonstrated the example which used the signal terminal for the terminal 4, it is applicable to a ground terminal, a power supply terminal, and all other terminals.

It is a perspective view of the connector (socket) provided with the terminal which concerns on suitable embodiment of this invention. It is the II-II sectional view taken on the line of FIG. It is a perspective view of the plug fitted to the socket. It is the IV-IV sectional view taken on the line of FIG. It is sectional drawing which shows a mode that the said socket fits in the state which shifted | deviated to the said plug. It is an enlarged view of a terminal which is attached to the socket and is in proportion. FIG. 4 is an enlarged view of a terminal according to the present embodiment, which is attached to the socket. It is a principal part enlarged view which shows the modification of the bridge part of the said terminal. It is a principal part enlarged view which shows another modification of the said bridge | bridging part.

Explanation of symbols

1 Connector (socket)
1k Circuit board 2 Housing 3 Block 4 Terminal 4a Block fixing part 4d Housing fixing part 4e Displacement absorption part 4f Base part 4g Tail part 4h Bridge part 4ha One end 4hb Other end 4i Thickening part 4j Connection part (connection part)
10 Solder part

Claims (3)

A structure of a terminal provided across the housing and the block of the connector and supporting the block in a floating manner with respect to the housing,
The terminal includes a block fixing portion fixed to the block, a housing fixing portion fixed to the housing, and elastically deformed to support the block with respect to the housing. A displacement absorbing portion, a base portion connected to the displacement absorbing portion and the housing fixing portion, and a tail portion connected to the base portion and soldered to the circuit board.
A bridge part is formed between the tail part and the base part, and the bridge part is formed to be thinner or narrower than the base part, the housing fixing part, and the tail part. A connector terminal structure characterized by being softer than these.   2. The connector terminal structure according to claim 1, wherein one end of the bridge portion is connected to an upper portion of a side surface of the base portion and the other end is connected to an upper surface of the tail portion. 3. The connector terminal structure according to claim 1, wherein the bridge portion is formed by providing a lightening portion obtained by removing a part of the bridge portion between the base portion and the tail portion.

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