JP2006324149A - Terminal board and spacer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel terminal board and a spacer to be soldered on a printed board, especially ones for screwing down for fixing other components with a soldering area increased and so made as to be more firmly soldered to a printed board. <P>SOLUTION: The terminal board 1 is provided with a columnar body 10, and a mounting piece 20 formed protruded from an end face 10a of the columnar body for insertion into a through-hole of the printed board. A cut-through groove 3 is formed in communication from a tip of the mounting piece 20 to a position slightly wedging into a depth direction of the end face 10a of the columnar body, and a notched part 4 is formed in a depth direction of the end face 10a of the columnar body in continuation from an outer periphery face 20a of the mounting piece. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention belongs to the technical field of terminal blocks to which components such as lug terminals are fixed, inserted into through holes of a printed circuit board, and attached by soldering. Also, it belongs to the technical field of spacers that are also attached to a printed circuit board and used for stacking printed circuit boards.

  Conventionally, a terminal block to which a component such as a lug terminal is fixed, or a spacer used when a printed circuit board is laminated is known. These terminal blocks and spacers are generally attached by inserting attachment pieces into through holes provided in a printed circuit board and fixing the portions by soldering.

As a conventional terminal block and spacer, for example, in Patent Document 1, an LED lead is inserted into a through hole provided in a columnar body, and this lead protrudes to the lower side of the substrate through a through hole of a printed circuit board. The LED mounting spacer is configured to solder the protruding portion.
(Patent Document 2) describes a plurality of positioning ribs provided on the mounting surface of the terminal block with respect to the circuit board, and solder filled with the positioning ribs formed on the circuit board and inserted into the terminal block. A terminal block fixing device including a through hole is disclosed. In the terminal block according to this (Patent Document 2), since soldering is also performed on the inner wall of the through hole of the printed board, the terminal block does not tilt and can be more securely fixed to the board.

  However, in the conventional terminal block and spacer, the part to be fixed by soldering is at most between the mounting piece (lead, rib) and the back surface of the printed board, or the inner wall of the through hole and the outer periphery of the mounting piece. Therefore, the terminal block / spacer fixing force was still insufficient. That is, in general, other parts are often fixed to the terminal block / spacer with screws. However, since it is difficult to control the tightening force at that time, there is a possibility that soldering damage may occur due to tightening.

JP-A-6-188535 (Claim 1, 0008, FIG. 6) JP 2001-144465 A (Claim 1)

  Therefore, in view of the above-described conventional situation, the present invention increases the soldering area of a terminal block and a spacer of a type to be soldered on a printed circuit board, particularly those that are tightened with screws to fix other components, It is an object of the present invention to provide a novel terminal block and spacer that can be more firmly soldered to a printed board.

  In order to solve the above-mentioned problems, the present invention provides a columnar body having a fixing portion for fixing terminals, and a projection formed from an end surface of the columnar body and inserted into a through hole of a printed circuit board. A terminal block having a mounting groove, wherein a split groove is formed in communication from a tip of the mounting piece to a position where the end face of the columnar body protruding from the mounting piece slightly enters the depth direction, A terminal block is provided in which a cut is formed in the depth direction of the end face of the columnar body continuously from the outer peripheral surface of the piece.

  According to the above configuration, when attaching the terminal block to the printed circuit board, the solder rises in the split groove and flows out to the outside of the columnar body arranged on the printed circuit board front side, so that the outer periphery of the columnar body is soldered and the through Solder that has risen through the gap between the hole inner wall and the mounting piece flows into the notch, and the outer periphery of the mounting piece on the front side of the printed circuit board is soldered.

  According to a second aspect of the present invention, in the terminal block according to the first aspect, the cut is formed in a circular shape along the outer peripheral surface of the mounting piece.

  According to the said structure, solder flows in along the outer periphery of an attachment piece, and more reliable soldering is performed.

  According to a third aspect of the present invention, in the terminal block according to the first or second aspect, the distance between the inner wall of the through hole and the outer peripheral surface of the mounting piece is 0 when the diameter of the mounting piece is inserted into the through hole of the printed board. It is set to be 1 to 0.7 mm.

  According to the said structure, the range of the diameter of an attachment piece is specified so that solder may flow in smoothly along a through-hole inner wall.

  Furthermore, in Claim 4, the spacer which consists of a structure in any one of Claims 1-3 is provided.

  According to the said structure, the spacer attached firmly to a printed circuit board is provided. Here, the spacer refers to a component interposed between the substrates when the printed circuit boards are laminated.

  As described above, the terminal block and the spacer according to the present invention include the split groove formed from the tip of the mounting piece to the vicinity of the end surface of the columnar body, and the notch formed on the end surface of the columnar body along the outer peripheral surface of the mounting piece. When attaching to the through hole, the solder quickly flows into the front side of the printed board, resulting in an increase in the soldering area, and the terminal block / spacer can be firmly soldered to the printed board. Therefore, when tightening with screws to fix other components such as lug terminals, it is possible to securely attach without causing problems such as soldering damage due to tightening.

  Hereinafter, a terminal block according to the present invention will be described with reference to FIGS. Here, FIG. 1 is a perspective view showing an embodiment of a terminal block, FIG. 2 is a cross-sectional view for explaining an inflow state of solder when the terminal block is attached to the printed circuit board, and FIG. 3 is an attachment of the terminal block to the printed circuit board. FIG. 4 is a side view showing the usage state of the terminal block. In addition, although the terminal block for fixing and using a lug terminal etc. is demonstrated in the example of FIGS. 1-4, if it replaces with a lug terminal etc. and a printed circuit board etc. are fixed, it can be used as a spacer, Therefore The following description can be similarly applied to the spacer.

  As shown in FIG. 1, the terminal block 1 according to this embodiment is generally configured by a columnar body 10 and an attachment piece 20 formed to project from an end surface 10 a of the columnar body 10. Then, the split groove 3 is formed so as to communicate from the tip of the mounting piece 20 to a position where the columnar body end surface 10a slightly enters the depth direction, and further, the columnar body end surface 10a continues from the outer peripheral surface 20a of the mounting piece. Cuts 4 are formed in the depth direction.

  The terminal block 1 is made of a conductive material such as brass, copper, or stainless steel, and the columnar body 10 and the mounting piece 20 are integrally formed. The columnar body 10 can have various shapes such as a columnar shape as shown in FIG. 1 and a prismatic shape, and as shown in FIG. 2, a fixing portion 10b such as a screw hole for fixing terminals. Is formed.

  Next, the soldering state when the terminal block 1 is attached to the printed circuit board P will be described. As shown in FIG. 2, when attaching the terminal block 1, first, the attachment piece 20 is inserted into the through hole P <b> 1 of the printed circuit board P, and then solder is filled from the back side of the printed circuit board P. As shown in FIG. 2, the filled solder ascends along the split groove 3 provided in the mounting piece 20 and the end face 10a of the columnar body (direction A in FIG. 2), and separately from the outer periphery of the mounting piece. 2 and the inner wall of the through hole P1 (the surface of the circuit portion P2 when the circuit portion P2 exists) also flows into the gap (direction B in FIG. 2).

  The solder flowing in along the split groove 3 flows out from the split groove 3 at the outer edge portion of the end face 10 a of the columnar body, and surrounds the outer periphery of the columnar body 10. In this state, the soldering is completed, and the outer periphery of the columnar body 10 and the printed board P are fixed.

  Also, the solder that has flowed into the gap along the inner wall of the through hole P1 reaches the acute notch 4 formed in the end surface 10a of the columnar body, and soldering is performed in this state. Thereby, the surface of the printed circuit board P and the outer periphery of the mounting piece 20 are fixed. As a result, as shown in FIG. 3, when the terminal block 1 according to this embodiment is used, the outer periphery of the columnar body 10, the outer periphery of the mounting piece 20 on the surface of the printed board P, and the inner wall of the through hole P1 Then, soldering can be performed on a large number of surfaces such as the outer periphery of the mounting piece 20 on the back surface of the printed circuit board P, and the soldering strength can be greatly increased. Therefore, even when tightening with screws to fix other components such as lug terminals, high strength can be ensured without causing soldering damage due to tightening.

  If the depth of the split groove is too deep, the flow of solder may worsen and soldering may be insufficient. Therefore, the depth of the split groove should be less than 1 mm on the end face 10a of the columnar body. Is preferred. Further, it is preferable that the cut 4 has a depth similar to that of the split groove 3 and is formed in a circular shape (one round so as to surround the mounting piece 20) along the outer peripheral surface 20a of the mounting piece.

  Further, the diameter of the mounting piece 20 is appropriately set so that the solder can smoothly flow along the inner wall of the through hole P1. Specifically, it is preferable to set the distance between the inner wall of the through hole P1 and the outer peripheral surface 20a of the mounting piece to be about 0.1 to 0.7 mm.

  As shown in FIG. 4, the terminal block 1 as described above can fix terminals T such as lug terminals by screwing to the fixing portion 10b. As the terminals T, in addition to the lug terminals, various terminals such as terminal portions of various elements such as LEDs can be fixed.

It is a perspective view which shows one Embodiment of the terminal block which concerns on this invention. It is sectional drawing explaining the inflow state of the solder at the time of attaching the terminal block which concerns on this invention to a printed circuit board. It is sectional drawing which shows the state which attached the terminal block which concerns on this invention to the printed circuit board. It is a side view which shows the use condition of the terminal block which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Terminal block 20 Mounting piece 20a Peripheral surface 10 Columnar body 10a End surface 10b Fixing part 3 Split groove 4 Cutting H Solder P Printed circuit board P1 Through hole P2 Circuit part T Terminals

Claims (4)

  A terminal block having a columnar body having a fixing portion for fixing terminals, and a mounting piece that protrudes from an end surface of the columnar body and is inserted into a through hole of a printed circuit board. A split groove is formed in communication from the tip to the position where the end face of the columnar body protruding from the mounting piece slightly enters the depth direction, and the depth of the end face of the columnar body continuously from the outer peripheral surface of the mounting piece. A terminal block with a cut in the direction.   The terminal block according to claim 1, wherein the cut is formed in a circular shape along the outer peripheral surface of the mounting piece.   3. The terminal block according to claim 1, wherein the distance between the inner wall of the through hole and the outer peripheral surface of the mounting piece is 0.1 to 0.7 mm when the diameter of the mounting piece is inserted into the through hole of the printed circuit board. Terminal block characterized by being set to be.   The spacer which consists of a structure in any one of Claims 1-3.

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