JP3025697B2 - Terminal device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a terminal device for a printed wiring board, which is used by connecting a plurality of terminal block bodies each having a built-in terminal.

(Prior Art) Conventionally, a terminal device for a printed wiring board as shown in FIG. 6 has been known.

In this terminal device, a lock terminal 2 is incorporated in a terminal base body 1 integrally formed in a box shape with a lower surface opened by a synthetic resin, and a pin portion cut and raised on the lower surface of the lock terminal 2 is formed. 3 protrudes downward from the opening on the lower surface of the terminal block main body 1. When attaching the terminal device to the printed wiring board, the pin portion 3 is penetrated and soldered to a printed wiring board (not shown), and the terminal block main body 1 is mounted.
Is abutted on the printed wiring board. Also,
An electric wire inserted into the terminal block main body 1 is connected to the lock terminal 2 by lock.

In this type of terminal device, one terminal block main body 1 may be attached to a printed wiring board alone, or a plurality of terminal block main bodies 1 may be connected and attached. For this connection, a convex connecting portion 4 is formed on one side of the terminal block main body 1 so as to protrude, and a concave connecting portion 5 with which the convex connecting portion 4 of the other terminal block main body 1 is engaged. Are formed on the opposite side surface. Then, the convex connecting portion 4 and the concave connecting portion 5
, The plurality of terminal block main bodies 1 are connected with at least a part of the side surfaces abutting each other. The butted portion is mainly a surface located on the distal end side of the convex connection portion 4 and a surface located on the back side of the concave connection portion 5.

By the way, the terminal block body 1 is a synthetic resin molded product, but has a box shape with an open lower surface. Therefore, when the terminal block body 1 is molded by a mold, a pair of dies are connected to the terminal block body. 1 open and close. In such molding, the terminal block main body 1 is set to have a taper so that the terminal block main body 1 as a molded product can be smoothly released from the mold. That is, the terminal block main body 1 has a tapered shape whose outer surface shape becomes thinner upward or downward. If the mold is manufactured without the taper, it is difficult to remove the molded product from the mold, which not only reduces the productivity, but also deforms the molded product and completes a high-quality product. Is not possible, and variations occur depending on the degree of deformation, so that products of a certain quality cannot be supplied.

Therefore, although a slight taper is required, conventionally, the taper is set up to the butted portion of the side surfaces of the terminal block main bodies 1 to be connected. As a result, since both butted portions make an angle of less than 90 degrees with respect to the lower surface of the terminal block main body 1, when the butted portions are butted against each other to connect the pair of terminal block main bodies 1, the lower surfaces of both terminal block main bodies 1 are connected. Will not lie on the same plane and will make an angle of less than 180 degrees to each other. Therefore, as shown in FIG. 6, when a plurality of terminal block main bodies 1 are connected,
Warpage occurs in the whole. In FIG. 6,
Although a large number of terminal block main bodies 1 are shown connected to each other in order to clearly show the warp, the number of connection is generally two or three.
There are many cases. In any case, the greater the number of connections, the greater the warpage due to the overlapping of the extraction tapers.

When a plurality of terminal devices connected to each other in a state where the terminal block bodies 1 are warped are mounted on a printed circuit board, a gap is formed between the printed circuit board and the lower surface of the terminal block body. As a result, dust penetrates into this gap, and an error occurs in the pitch dimension of the pin portion 3 of the lock terminal soldered to the printed wiring board.

For this reason, in the terminal device, the printed wiring board is deformed by the warpage of the plurality of connected terminal block main bodies 1,
Unnecessary stress is applied to the copper foil printed on the printed wiring board, and it is difficult to attach the terminal device to the printed wiring board, resulting in reduced workability.

(Problems to be Solved by the Invention) As described above, in a conventional terminal device in which a plurality of terminal block main bodies are connected to each other and attached to a printed wiring board, the terminal terminal bodies to be connected are pulled out to the butted portions on the side surfaces of the connected terminal block main bodies. Since the taper is set, warpage occurs when multiple terminal block bodies are connected, it is difficult to attach to the printed wiring board, dust enters between the printed wiring board and the terminal block main body, printed wiring There is a problem that excessive stress is applied to the copper foil of the substrate.

The present invention has been made in view of such a point, and an object of the present invention is to provide a terminal device that can connect a plurality of terminal block bodies without warping with a simple structure and without a problem in molding.

(Means for Solving the Problems) A terminal device according to the present invention is a terminal block main body which is integrally formed of synthetic resin with a vertical direction being a mold opening / closing direction, and is formed in a tapered shape whose side surface becomes thinner upward or downward. And a terminal having a pin built into the terminal block main body and protruding from the lower surface thereof, wherein the terminal block main body has a first connecting portion formed on one side, and another side opposite to the one side. And a second connecting portion engaged with the first connecting portion of the other terminal block main body, and the plurality of terminal block main bodies are formed in side surfaces by the engagement of the first connecting portion and the second connecting portion. In a terminal device in which at least a part of the terminal block body is connected to each other, a plane including a contact point on one side surface of the terminal block main body with the other side surface of the other terminal block main body forms with a lower surface of the terminal block main body. Angle and the other side of the terminal block body The sum of an angle formed by a plane including a contact point on one side surface of another terminal block main body and a lower surface of the terminal block main body is 180 degrees.

(Operation) In the terminal device of the present invention, when molding the terminal block main body, since the terminal block main body is formed of synthetic resin, the pair of dies is opened and closed in the vertical direction of the terminal block main body. For this reason, the side surface of the terminal block main body is formed in a tapered shape that becomes thinner upward or downward, and a draft taper is set. Then, the terminal device of the present invention is attached to the printed wiring board by soldering a pin portion of the terminal built in the terminal block main body to the printed wiring board. At this time, a plurality of terminal block main bodies may be connected and attached, but the plurality of terminal block main bodies are connected to a first connecting portion on one side of the terminal block main body and a second connecting portion on the other side of the other terminal block main body. By engaging with the connecting portion, the side surfaces are connected in a state where at least a part of the side faces abut each other. At this time, the angle formed by the plane including the contact point on one side surface of the terminal block main body with the other side surface of the other terminal block main body and the lower surface of the terminal block main body, and the other terminal block main body on the other side surface of the terminal block main body Since the sum of the angle formed by the plane including the contact point on one side surface with the lower surface of the terminal block main body is 180 degrees, when a plurality of terminal block main bodies are connected, these terminals do not warp. The lower surface of the base body is located on the same plane.

(Embodiment) Hereinafter, the configuration of an embodiment of the terminal device of the present invention will be described with reference to FIG. 1 to FIG.

 This terminal device is for a printed wiring board.

Reference numeral 11 denotes a terminal block main body, and the terminal block main body 11 is formed of an insulating synthetic resin. Further, the terminal block main body 11 is formed in a box shape with few undercuts in the vertical direction in which the lower surface is opened. For this reason, when molding the terminal block main body 11, the pair of dies are opened and closed in the vertical direction of the terminal block main body 11, but both sides of the terminal block main body 11 have The taper is formed in a tapered shape that becomes thinner toward the center, and an extraction taper is set. In other words, the terminal block main body 11 has a tapered shape in which its outer surface shape is slightly tapered upward.

Here, both side surfaces of the terminal block main body 11 are formed in a tapered shape that becomes thinner upward.
May be formed in a tapered shape that becomes thinner downward.

The terminal block body 11 has a pair of left and right terminal storage chambers.
It is divided into twelve. A pair of left and right wire through holes 13 are formed in the upper surface of the terminal block main body 11 facing the terminal storage chambers 12 in the vertical direction on the rear side, and a pair of left and right button through holes 14 are formed. Is formed on the front side in a vertical direction. In addition, on the upper surface of the terminal block main body 11, wall bodies 15 respectively located on both left and right sides of both button through holes 14 are integrally formed so as to protrude.

Further, a connecting convex portion 16 as a first connecting portion is integrally formed on an outer side surface on the right side when viewed from the front of the terminal block main body 11. The connecting projection 16 has a linear shape in the up-down direction, but in a planar shape, widens outward to the right side, and the front and rear sides have a substantially eight-shaped fastening surface. It has become 17. by the way,
At least in the position other than the connection protrusion 16, the right outer side surface of the terminal block main body 11 is
The angle is slightly smaller than 90 degrees with respect to the flat lower surface of FIG. However, the abutting portion 18, which is a flat end surface on the right side of the connecting convex portion 16, is inclined relative to other portions of the right outer surface of the terminal block main body 11, and the lower surface of the terminal block main body 11 At an angle of 90 degrees. That is, the butting portion 18 protrudes more outward as it goes upward with respect to other portions of the right outer surface of the terminal block main body 11.

On the other hand, a pair of ribs 21 extending substantially in the vertical direction are formed integrally and substantially in parallel on the outer surface on the left side of the terminal block main body 11, and the connecting protrusions of the other terminal block main bodies 11 are formed between these ribs 21. A connection recess 22 is formed as a second connection portion with which the portion 16 is engaged. The front and rear left side surfaces of the connection concave portion 22 are tightening surfaces 23 to which the both tightening surfaces 17 of the connection convex portion 16 are pressed. By the way, at least the connecting recess 22
In other positions, the left outer surface of the terminal block main body 11 forms an angle slightly smaller than 90 degrees with respect to the lower surface of the terminal block main body 11 due to the above-described taper. However, the butted portion 24, which is a plane surface between the ribs 21, is relatively inclined with respect to other portions of the left outer surface of the terminal block main body 11, and is 90 ° with respect to the lower surface of the terminal block main body 11. At an angle of degrees. That is, the butting portion 24 protrudes more outward as it goes upward with respect to other portions of the left outer surface of the terminal block main body 11.

In this manner, the engagement between the connection protrusion 16 and the connection recess 22 allows the plurality of terminal block main bodies 11 to be connected in a state where the flat butting portions 18 and 24 on the left and right side surfaces are butted against each other. .

Lock terminals 31 are mounted in both terminal storage chambers 12 of the terminal block main body 11, respectively. These lock terminals
Numerals 31 are each formed of a plate having conductivity and elasticity, and the electric wires (not shown) inserted into the terminal block main body 11 through the electric wire holes 13 are locked and connected. More specifically, the lock terminal 31 has the wire receiving portion 32 on the rear side and the leaf spring portion 33 on the front side, and the wire receiving portion 32 and the leaf spring portion 33 Is used to hold the electric wire. A pin 34 for connection to a printed wiring board (not shown) is formed by vertically cutting and raising the lower surface of the lock terminal 31 downward, and protrudes from the lower surface opening of the terminal block main body 11.

Further, a release button formed of an insulating synthetic resin is provided in both button through holes 14 of the terminal block main body 11.
36 is slidably supported in the vertical direction.
These release buttons 36 are operated by an operator to release the lock on the electric wire by pressing the leaf spring portion 33 of the lock terminal 31 downward to separate it from the electric wire.

 Next, the operation of the embodiment will be described.

The terminal device is attached to the printed wiring board by the pin portion 34 of the lock terminal 31 being penetrated and soldered to the printed wiring board. At that time, one terminal block body
11 Although it may be installed alone, multiple terminal block
Are often connected. The connection of the terminal block main body 11 is performed before soldering.

To connect another terminal block main body 11 to a certain terminal block main body 11, insert the connection convex portion 16 of the other terminal block main body 11 into the connection concave portion 22 of one terminal block main body 11 from above or below,
The connecting projection 16 and the connecting recess 22 are engaged with each other. In this state, the butting portion 18 on the right outside surface of the one terminal block body 11 and the butting portion 24 on the left outside surface of the other terminal block body 11 abut against each other and come into surface contact with each other. When the fastening surfaces 17, 23 of the recess 22 are pressed against each other, the two terminal block main bodies 11 are fixed and connected to each other.

At this time, since the fastening surfaces 17 and 23 are tapered in the left-right direction, the angle formed by the two terminal block main bodies 11 is defined by the butting portions 18 and 24 abutting each other.
Since both flat butting portions 18 and 24 form an angle of 90 degrees with respect to the lower surface of each terminal block main body 11, both terminal block main bodies 11 are in a state where the lower surfaces are located on the same plane. Will be linked. Note that the distal end surface of the rib 21 is in contact with the outer surface of the terminal block main body 11 at the lower portion, but is located slightly away from the outer surface of the terminal block main body 11 at the upper portion.

As described above, the terminal block main bodies 11 are connected to each other in a state where the lower surface is located on the same plane, so that both side surfaces of the terminal block main body 11 are formed in a tapered shape that becomes thinner upward, and a draft taper is set. However, when the plurality of terminal block main bodies 11 are connected, no warpage occurs. In addition, a butt portion 18 having a predetermined angle with respect to the lower surface of the terminal block main body 11 is formed on a surface located on the distal end side of the connection convex portion 16 of the terminal block main body 11 and a surface located on the back side in the connection concave portion 22. With a simple structure in which 24 is only formed integrally, warpage can be corrected. The simplicity of the structure has advantages such as easy dimensional accuracy.

Further, since the plurality of terminal block main bodies 11 can be connected without warpage, attachment to the printed wiring board is easy, and workability can be improved. Further, the lower surfaces of all the terminal block main bodies 11 can be brought into close contact with the printed wiring board, and no gap is generated between the printed wiring board and the lower surface of the terminal block main body 11. Therefore, dust does not enter between the printed wiring board and the lower surface of the terminal block body 11. At the same time, the pitch dimension P of the pin portions 34 of the lock terminal 31 becomes exactly the predetermined size, so that the printed wiring board to which the pin portions 34 are soldered is deformed, and the copper foil of the printed wiring board is unreasonable. No stress is applied.

Also, the abutting portions 18 and 24 have the opposite taper with respect to the extraction taper on both sides of the molded terminal block main body 11 on the basis of the extraction taper. Since the area is very small, there is no problem in molding. In other words, the releasability of the terminal block body 11 during molding does not deteriorate, and a high-quality product can be supplied stably.

In the above-described embodiment, the angle formed by the butting portions 18 and 24 with the lower surface of the terminal block body 11 is 90 degrees, respectively.
It is not limited thereto, and the angle formed by the mating portion 18 on one side of the terminal block main body 11 with respect to the lower surface of the terminal block main body 11 and the butting portion 24 on the other side are formed with respect to the lower surface of the terminal block main body 11. What is necessary is that the sum of the angle and the angle formed is 180 degrees.

Also, the surface located on the distal end side of the connection convex portion 16 of the terminal block main body 11 and the surface located on the back side in the connection concave portion 22 are substantially entirely flat butted portions 18 and 24. A convex rib may be formed on one or both of the surface located on the distal end side of the convex portion 16 and the surface located on the inner side of the connection concave portion 22. In short, the sum of the angles formed by the planes including the contact points on both side surfaces of the terminal block main body 11 with the side surfaces of the other terminal block main bodies 11 with respect to the lower surface of the terminal block main body 11 may be 180 degrees. .

Furthermore, although both side surfaces of the terminal block main body 11 are formed in a tapered shape tapering upward, the present invention is not limited to this, and the vertical direction may be set as the mold opening / closing direction. That is, both side surfaces of the terminal block main body 11 can be formed in a tapered shape that becomes thinner downward.

(Effects of the Invention) According to the terminal device of the present invention, in the terminal device in which the plurality of terminal block main bodies are connected in a state where the side surfaces thereof abut each other by the engagement of the first connecting portion and the second connecting portion. The sum of the angles formed by the planes on both sides of the base body including the contact points with the side surfaces of the other terminal block bodies with respect to the lower surface of the terminal block body was 180 degrees. Despite the fact that the side surface of the main body is formed in a tapered shape that becomes thinner upward or downward and the taper is set, a plurality of terminal block main bodies can be connected without warpage, so that the mounting to the printed wiring board can be performed. Workability can be improved, there is no gap between the printed wiring board and the lower surface of the terminal block body, dust can be prevented from entering there, and furthermore, the terminals soldered to the printed wiring board can be used. Pi Since no error occurs in the pitch dimension of the soldering portion, it is possible to prevent excessive stress applied to the copper foil of the printed wiring board, and furthermore, the structure for correcting the warpage can be simplified, and the extraction taper cannot be set. Since it is only a small part, problems in molding can be solved.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the terminal device of the present invention, FIG. 2 is a plan view of the same, FIG. 3 and FIG.
FIG. 5 is a side view of the terminal block main body, FIG. 5 is a cross-sectional view of the same, and FIG. 6 is a front view of a state in which a large number of terminal block main bodies are shown as an example of a conventional terminal device. 11 ... terminal block body, 16 ... connecting projection as first connecting part, 22 ... connecting concave part as second connecting part, 31 ... terminal,
34 ... Pin part.

Claims (1)

(57) [Claims] 1. A terminal base body integrally formed of synthetic resin with the vertical direction being the opening / closing direction of a mold, and a tapered terminal base body having a side surface tapered upward or downward, and a lower surface incorporated in the terminal base body. A terminal having a pin protruding from the terminal block main body, wherein the terminal block main body has a first connecting portion formed on one side surface;
A second connecting portion formed on the other side surface opposite to the one side surface and engaged with the first connecting portion of the other terminal block main body, and engagement between the first connecting portion and the second connecting portion. In a terminal device in which a plurality of terminal block main bodies are connected in a state where at least a part of the side faces abut against each other, a plane including a contact point on one side surface of the terminal block main body with the other side surface of another terminal block main body is formed. The sum of the angle formed with respect to the lower surface of the terminal block main body and the angle formed by the plane including the contact point of the other side surface of the terminal block main body with one side surface of the other terminal block main body with respect to the lower surface of the terminal block main body. A terminal device characterized by 180 degrees.