JPH0747805Y2 - Terminal device for printed wiring board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a terminal device for a printed wiring board using a lock terminal.

(Prior Art) Conventionally, as shown in FIG. 5, a metal-made substantially rectangular frame-shaped locking terminal 2 is fitted into a terminal base body 1 formed of a synthetic resin in a box shape whose lower surface is opened. There is known a printed wiring board terminal device in which a bottom portion 3 of the locking terminal 2 is formed by cutting and raising a pin portion 4 connected to the printed wiring board downward. The locking terminal 2 has a structure in which a bottom plate portion 3, a pair of side plate portions 5 and 6, and a plate spring portion 7 bent from the tip of one side plate portion 5 are integrally formed. When the electric wire is inserted through the through hole 8 formed in the upper surface of the base body 1, the electric wire is sandwiched between the other side plate portion 6 of the locking terminal 2 and the tip of the leaf spring portion 7 to be locked and connected. It has become so. Further, a release button 9 is vertically penetrated and supported on the upper surface portion of the terminal block body 1. When the release button 9 is pushed downward, the leaf spring portion 7 is pushed downward by the release button 9 and the electric wire from the electric wire. The wire is separated, and the lock on the wire is released so that the wire can be pulled out.

However, in the above-mentioned conventional structure in which the leaf spring portion 7 for holding the electric wire is the same member as the locking terminal 2, if the locking terminal 2 is made of a material having excellent conductivity, the locking terminal 2 Has a low elasticity and the electric wire insertion connectability deteriorates. On the other hand, if the locking terminal 2 is made of a material having excellent elasticity, there is a problem that the electric connection deteriorates.

Further, conventionally, as described in, for example, Japanese Utility Model Laid-Open No. 55-36541, a substantially U-shaped terminal base body composed of a bottom plate portion and a pair of side plate portions and a substantially L-shaped leaf spring are respectively suitable. There is a structure in which a lock terminal composed of the terminal base body and the leaf spring is incorporated into the terminal block body as a separate component made of material.

However, according to this structure, the substantially L-shaped leaf spring of the locking terminal has one end for pressing the electric wire and the other end for attaching to the terminal block body, so that the leaf spring can be installed in the terminal block body in a proper direction. There is a problem that the lock terminal is inserted into the terminal block body, so the lock terminal may fall off before the terminal block body is installed on the printed wiring board. At the same time, since the terminal base body of the lock terminal is not directly held by the terminal block body, the terminal base body to which the electric wire is connected moves, and there is a problem in the reliability of electrical connection.
Since the side plate portion of the terminal base for connecting the electric wire projects into the insertion area of the electric wire, it is necessary to elastically displace the side plate portion when the electric wire is inserted. There is a problem with connectivity.

(Problems to be Solved by the Invention) As described above, in the conventional terminal device for a printed wiring board, if the locking terminal is formed as a separate component for the terminal base and the leaf spring, the assemblability deteriorates, and the terminal to the printed wiring board is degraded. There is a problem that the locking terminals fall off before the base body is arranged, there is a problem that the reliability of the electrical connection is low, and there is a problem with the wire insertability.

The present invention is intended to solve such a problem, and can improve the assemblability of the lock terminal to the terminal block body, and securely hold the lock terminal on the terminal block body to prevent the electric wire It is an object of the present invention to provide a terminal device for a printed wiring board, which can improve the reliability of electric connection and further improve the insertability of electric wires.

[Constitution of device]

(Means for Solving the Problem) The present invention is directed to a terminal block body 11 having a terminal accommodating portion 13 therein and an electric wire insertion hole 14 on an upper surface thereof, and the terminal block body.
The terminal base 32 and the leaf spring 33 for locking and locking the electric wire 61 that is housed in the terminal housing 13 of 11 and is inserted through the wire insertion hole 14.
In the terminal device for a printed wiring board having a locking terminal 31 made of, the terminal base 32 includes a bottom plate portion 34 and a pair of side plate portions 35, 36 protruding upward from both sides of the bottom plate portion 34.
From this, the bottom plate portion 34 is provided with a pin portion 39 for connecting to the printed wiring board, and the pair of side plate portions 35 and 36 are inserted into and housed in the inner wall of the terminal housing portion 13. A locking claw portion 37 for locking is provided in a projecting manner, and the leaf spring 33 has a pair of bottom portions 41, 42 of the same shape formed into a substantially L shape through a bent portion 43 narrower than the plate portions 41, 42. One plate portion 41 is bonded to the inner surface of one side plate portion 35 of the terminal base 32, and the other plate portion 42 is connected to the terminal base 32 through the bent portion 43 at the upper end of the one plate portion 41. Is elastically pressed against the inner surface of the other side plate portion 36 of the terminal block body 11, and
An opening for inserting and storing the lock terminal 31 is provided on the bottom surface of the
One side plate portion 35 of the terminal base 32 is provided on one side of the terminal housing portion 13.
One terminal groove that holds both edges of the connector in the inserted and stored state
22 and a leaf spring groove portion 25 for holding both side edge portions of one plate portion 41 of the leaf spring 33 in an inserted and stored state,
On the other side of the terminal housing portion 13, both sides of the other side plate portion 36 are positioned so that the inner surface of the other side plate portion 36 of the terminal base 32 faces the insertion area of the electric wire 61 inserted through the electric wire insertion hole 14. The other terminal groove 23 for holding the edge portion in the inserted and stored state is provided.

(Operation) In the present invention, at the time of assembly, first, the plate portion 41 of the plate spring 33 is placed on the inner surface of the side plate portion 35 of the terminal base 32 so that the bent portion 43 of the plate spring 33 is located above. In addition to the joint arrangement, the tip of the other plate portion 42 of the leaf spring 33 is arranged in pressure contact with the inner surface of the other side plate portion 36 of the terminal base 32. At this time, the leaf spring 33
Since the pair of plate portions 41 and 42 have the same shape, there is no directivity to attach to the terminal base 32. Then, the terminal base 32 to which the plate spring 33 is attached in this manner is connected to the terminal housing portion of the terminal block body 11.
Insert from bottom opening of 13. At this time, both side edge portions of the side plate portions 35, 36 of the terminal base 32 are inserted into the terminal groove portions 22, 23, and both side portions of one plate portion 41 of the leaf spring 33 are inserted into the leaf spring groove portion 25. .

Then, in a state in which the lock terminal 31 is inserted and housed in the terminal housing portion 13 of the terminal block body 11, the side plate portions 35 and 36 of the terminal base 32 are held by the terminal groove portions 22 and 23, and the side plate portions 35. The locking claws 37 of the terminals 36 are locked to the inner wall surface of the terminal housing 13 by locking them, and the inner surface of the other side plate 36 of the terminal base 32 is inserted through the wire insertion hole 14 of the terminal block body 11. Facing parallel to the insertion area of the electric wire 61. In addition, one plate portion 41 of the plate spring 33 is held by the plate spring groove portion 25.

Further, at the time of connecting the electric wire, the electric wire 61 is inserted through the electric wire insertion hole 14 of the terminal block body 11, and is clamped by the tip of the other plate portion 42 of the leaf spring 33 and the inner surface of the other side plate portion 36 of the terminal base 32. Then, the electric wire 61 is locked and connected. At this time, since the inner surface of the other side plate portion 36 of the terminal base body 32 is held at a position facing in parallel to the electric wire insertion area, the electric wire 61 is easily inserted and is surely attached to the other side plate portion 36 of the terminal base body 32. Electrically connected to.

(Embodiment) The construction of an embodiment of the printed wiring board terminal device of the present invention will be described below with reference to FIGS. 1 to 4.

In the figure, 11 is a terminal block body, and this terminal block body 11 is
It is formed in a box shape with an open lower surface formed of an insulating material such as synthetic resin. The inside of the terminal block body 11 is partitioned into a pair of left and right terminal housing chambers 13 and 13 as a terminal housing portion by a partition wall 12 formed in the center portion in the left-right direction.
An opening is formed on the bottom surface of the. A pair of left and right wire insertion holes 14, 14 are formed in the upper surface of the terminal block body 11 so as to face the terminal storage chambers 13, 13 at the rear side in the vertical direction, and a pair of left and right buttons are formed. Through hole
15 and 15 are formed on the front side in the vertical direction. The electric wire insertion holes 14, 14 are round holes, and the lower portions are tapered downward. The button through hole 15 has a square hole-like shape and has inclined surfaces 16 and 16 descending rearward at the lower portion of the rear surface.

Then, on the upper surface of the terminal block main body 11, wall bodies 17, 17, 17, 17 are vertically formed so as to be located on the left and right sides of each button through hole 15, respectively. These wall bodies 17, 17, 17, 17 project toward the front side, the rear side, and the upper side of the button through holes 15, 15.

In addition, facing the respective terminal storage chambers 13 and 13, the terminal block main body 1
A pair of left and right locking holes 21, 21 are formed through the front surface of the first part. In addition, in the front edge portion and the rear edge portion of the left and right side surfaces in each terminal accommodating chamber 13,13, there are groove portions 22,22,22,2 for terminals that are pulled out downward.
2,23,23,23,23 are each formed in a concave shape. Furthermore, on both the left and right side surfaces in each terminal storage chamber 13,13, the projections 24, 24, 24, 24 are spaced slightly backward from the front terminal groove portion 22.
Are formed, and the groove portions 25, 25, 25, 25 for leaf springs that extend downward in front of these ridges 24, 24, 24, 24 are formed in a concave shape. In addition, the lower portions of the front edges of the protrusions 24, 24, 24, 24 are inclined edges 26, 26, 26, 26 for inviting.

Further, a connection convex portion 27 that widens outward is formed on the outer surface on the right side when viewed from the front of the terminal block body 11. On the other hand, a connection concave portion 28 with which a connection convex portion 27 of another terminal block body 11 is engaged is formed on the outer surface on the left side of the terminal block body 11.

31 and 31 are a pair of left and right locking terminals.
Are terminal bases 32, 32 and leaf springs 33, 33, respectively.

The terminal bases 32, 32 are made of a material having good conductivity, for example, brass, and the bottom plate portions 34, 34 and a pair of side plate portions 35 vertically bent upward from both front and rear edges of the bottom plate portions 34, 34. , 35,3
6 and 36, they are formed in a substantially U-shape when viewed from the side. The terminal bases 32, 32 are connected to the terminal housing chambers 1 of the terminal block body 11.
It is to be fitted inside 3,13 and each side plate 35,35,
The left and right side edges of 36, 36 are inserted into the terminal groove portions 22, 22, 22, 22, 23, 23, 23, 23 of the terminal storage chambers 13, 13, respectively. Further, locking claw portions 37, ..., 37 that bite into the terminal block body 11 are formed to project in the vicinity of the bottom plate portions 34, 34 on the left and right side edges of the side plate portions 35, 35, 36, 36, respectively. ing. Further, locking piece portions 38, 38 to be engaged with the respective locking holes 21 of the terminal block body 11 are formed by cutting and raising the upper side with the upper side as the base side at the center of the front side plate portions 35, 35. .

Then, on each bottom plate portion 34, 34, pin portions 39, 39 for connection to a printed wiring board (not shown) are vertically cut and formed downward.

On the other hand, the leaf springs 33, 33 are made of a highly elastic material such as stainless steel, and are formed in a side view substantially L-shape by the side plate portions 41, 41, 42, 42 as a pair of acutely-shaped plate portions of the same shape. The width of the left and right sides of the terminal base 32, 32
It is slightly smaller than the width in the left-right direction. And
The leaf springs 33, 33 are arcuate bent portions between the both side plate portions 41, 41, 42, 42.
With 43, 43 on the upper side, the side plate parts 41, 41 on the front side are the terminal bases 32, 3
2 is joined to the inner surfaces of the front side plate portions 35, 35, and the tips of the upper side plate portions 42, 42 are the rear side plate portions of the terminal base bodies 32, 32.
It is to be pressed against the inner surface of the 36, 36, and the left and right edges of the front side plate portions 41, 41 are respectively in the leaf spring groove portions 25, 25, 25, 25 of the terminal storage chambers 13, 13. It is inserted. Further, notches 44, 44, 44, 44 are formed at the left and right side edges of the bent portions 43, 43, respectively.
The width in the left-right direction is smaller than the distance between the facing openings of the pair of leaf spring groove portions 25, 25, 25, 25 in the terminal accommodating chambers 13, 13.

The leaf springs 33, 33 have a shape in which the pair of side plate portions 41, 41, 42, 42 are symmetrical.

51, 51 are a pair of left and right release buttons formed of an insulating material such as synthetic resin.
Are pierced and supported in the button through holes 15 and 15 of the terminal block body 11 so as to be slidable in the vertical direction. At the bottom of each release button 51,51, the inclined surface of the button through hole 15,15
The slanted parts 52, 52 along the 16, 16 are formed.
52, 52 can be elastically contracted in the left-right direction by kerfs (not shown). The lower ends of the inclined portions 52, 52 are in contact with the upper side plate portions 42, 42 of the leaf springs 33, 33 from above. Further, retaining projections 53, ..., 53 are formed on the lower portions of the left and right side surfaces of the inclined portions 52, 52, respectively, and these projections 53, ..., 53 are the upper surfaces in the terminal storage chambers 13, 13. The release buttons 51, 51 are locked to the terminal block body 11 by being engaged with.

In addition, the upper end portion of the release button 51, 51 projecting upward from the button through hole 15, 15 has a flange portion 54,5 for preventing entry.
4 are formed. Further, engagement recesses 55, 55 for tool engagement are formed on the upper surfaces of the flange portions 54, 54.

The portions of the release buttons 51, 51 protruding outward from the terminal block body 11 are entirely covered by the two pairs of walls 17, 17, 17, 17 from the left and right sides, respectively. Even in the most outwardly protruding state, the upper surfaces of the release buttons 51, 51 are located at the same height as the upper ends of the walls 17, 17, 17, 17 or slightly lower than the upper ends.

Next, a method for assembling the terminal device will be described.

The release buttons 51, 51 are inserted into the button through holes 15, 15 of the terminal block body 11 from the upper outside. Then, the slanted portions 52, 52 of the release buttons 51, 51 are once reduced in width, and the retaining projections 53, ..., 53 cross over the button through holes 15, 15, and the inside of the terminal storage chambers 13, 13 The upper surface is engaged.

Further, the bent portions 43, 43 of the leaf springs 33, 33 are connected to the terminal bases 32, 32, respectively.
Of the side plate portions 35, 35 of the respective terminal springs 32, 32 and one of the side plate portions 35 of the respective leaf springs 33, 33 near the bent portions 43, 43. , 35, and the tip of the other side plate portion 42, 42 of each leaf spring 33, 33 is brought into contact with the inner surface of the other side plate portion 36, 36 of each terminal base 32, 32. Further, the leaf springs 33, 33 are slightly turned to one side plate portion 41,
41 is joined to the inner surface of one side plate portion 35, 35 of each terminal base 32, 32.

In this way, the terminal base bodies 32, 32 with the leaf springs 33, 33 attached thereto are inserted from the tip ends of the side plate portions 35, 35, 36, 36 into the respective terminal storage chambers 13, 13 of the terminal block body 11 through their lower surface openings. Mating. Along with that, the left and right side edges of the side plate portions 35, 35, 36, 36 of the terminal bases 32, 32 are formed in the terminal groove portions 22, 22, 22, 2, 2 of the terminal storage chambers 13, 13.
2,23,23,23,23, and the left and right side edges of one side plate portion 41,41 of each leaf spring 33,33 are respectively inserted in the leaf spring groove portions 25,25,25,25. To be done. At this time, the ridges 24, 24, 24, which form the groove portions 25, 25, 25, 25 for the leaf springs,
Reference numeral 24 denotes notches 44,44 on the left and right sides of the bent portions 43,43 of the leaf spring 33.
Pass each.

When the fitting is completed, both side plate portions 3 of the terminal bases 32, 32 are
The locking claws 37, ... 37 on the left and right edges of 5,35,36,36 bite into the terminal block body 11, and the locking pieces 38,38 of one of the side plate portions 35,35 are the terminal block body. 11 is engaged with the locking holes 21, 21,
The terminal base bodies 32, 32 are firmly held and fixed to the terminal base body 11. At the same time, the left and right side edges of the one side plate portion 41, 41 of each leaf spring 33, 33 are connected to the one side plate portion 35, 35 of the terminal base 32, 32 and the ridges 24, 24, 24 in the terminal block body 11. , 24, the side plate portions 41, 41 of the leaf springs 32, 32 are firmly held and fixed to the terminal block body 11.

In this assembled state, the inner surfaces of the other side plate portions 36, 36 of the terminal bases 32, 32 are positioned so as to face the insertion area of the electric wire 61 inserted through the electric wire insertion holes 14, 14 in parallel, and The tip ends of the other side plate portions 42, 42 of the leaf springs 33, 33 are positioned so as to project into the insertion area of the electric wire 61.

In this way, the leaf springs 33, 33, the terminal base bodies 32, 32, and the terminal block body 11 can be easily and reliably assembled. In addition, the terminal bases 32, 32 are simple and substantially U-shaped, and the leaf springs 33, 33 are also simple and substantially L-shaped. It can be raised even higher.

Further, the leaf springs 33, 33 have a shape in which the pair of side plate portions 41, 41, 42, 42 are symmetrical, and the front-back directionality in the arrangement direction of the pair of side plate portions 41, 41, 42, 42 is different. Since there is no terminal base 3
Either side plate portion 41, 41, 42, 42 may be set to the front side when assembled to 2, 32. Therefore, the assemblability is further improved.

Next, the work of connecting the electric wire 61 using the above terminal device will be described.

If necessary, by engaging the connecting convex portion 27 and the connecting concave portion 28, a plurality of terminal devices are arranged side by side in the left-right direction and connected.

Then, the terminal device is mounted on the printed wiring board. That is, the pin portions 39, 39 of the terminal bases 32, 32 are mechanically and electrically connected to the printed wiring board by soldering or the like. Further, the electric wire 61 is inserted into the terminal block body 11 from the upper outer side through the electric wire insertion holes 14, 14. Then, this electric wire 61
It is elastically sandwiched between the inner surfaces of the side plate portions 36, 36 of the terminal bases 32, 32 and the tips of the side plate portions 42, 42 of the leaf springs 33, 33, and is connected to the lock terminals 31, 31 by a lock. It That is, the electric wire 61 is mechanically held by the leaf springs 33, 33, and the terminal base 3
Electrically connected to 2,32.

Then, the locking terminals 31, 31 are separated from the terminal base bodies 32, 32 which are separate bodies, and the leaf spring.
With the configuration of 33 and 33, it becomes possible to satisfy both the goodness of the electrical connection and the mechanical connection, and the reliability of the connection of the electric wire 61 can be improved. Moreover, despite the fact that the locking terminals 31, 31 are composed of two parts, as described above, the productivity is good.

Further, in order to remove the electric wire 61 connected by the lock, the outer upper surfaces of the release buttons 51, 51 are pushed downward and the release buttons 51, 51 are slid toward the inside of the terminal block body 11. Then, the side plates 42, 42 of the leaf springs 33, 33 are pressed downward by the release buttons 51, 51, and the side plates 42, 42 are elastically displaced and separated from the electric wire 61. Pull out.

In addition, in the above-described embodiment, the structure in which the pair of locking terminals 31, 31 are provided in one terminal block body 11 has been described, but only one locking terminal 31 is provided in one terminal block body 11. You can also use three or more locking terminals in one terminal block body 11.
31, ……, 31 may be installed in parallel.

[Effect of device]

According to the present invention, even if the lock terminal is composed of the terminal base and the leaf spring, the pair of plate portions of the leaf spring have the same shape so that the directionality is lost, and thus the lock terminal is easily assembled to the terminal block body. Can be improved. Moreover, the side plate portions of the terminal base of the lock terminal are inserted and stored in the terminal block body, and the locking claws of the side plate portions prevent the side plate portions from being inserted and stored, and one of the leaf springs Since the plate part of the terminal is inserted and housed, the lock terminal can be securely held in the terminal block body, and the lock wire is connected between the other side plate part of the terminal board and the other plate part of the leaf spring. The electrical connection reliability can be improved. Furthermore, since the inner surface of the other side plate portion of the terminal base is held in a position facing the electric wire insertion area in parallel, the electric wire insertion connectivity can be improved.

[Brief description of drawings]

1 is a sectional view taken along the line II of FIG. 3 showing an embodiment of the printed wiring board terminal device of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. A front view of the same, FIG. 4 is a plan view of the same, and FIG. 5 is a sectional view showing an example of a conventional terminal device for a printed wiring board. 11 …… Terminal block body, 13 …… Terminal storage chamber as terminal storage, 14 …… Wire insertion hole, 22,23 …… Terminal groove, 25 ……
Groove for leaf spring, 31 ... Locking terminal, 32 ... Terminal base, 33 ...
… Leaf spring, 34 …… Bottom plate, 35, 36 …… Side plate, 37 …… Locking claw part, 39 …… Pin part, 41, 42 …… Side plate part as plate part, 43 …… Bend part, 61 ... electric wire.

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. A terminal block main body having a terminal accommodating portion inside and an electric wire insertion hole provided on the upper surface, and a lock connecting the electric wire accommodated in the terminal accommodating portion of the terminal block main body and inserted through the electric wire insertion hole. In a printed wiring board terminal device including a terminal base and a locking terminal composed of a leaf spring, the terminal base has a substantially U-shape from a bottom plate and a pair of side plates protruding upward from both sides of the bottom plate. The bottom plate portion is provided with a pin portion that is connected to the printed wiring board, and the pair of side plate portions is provided with a locking claw portion that is locked in the inner wall of the terminal housing portion in an inserted and housed state. In the leaf spring, a pair of plate portions having the same shape are provided in a substantially L shape through a bent portion that is narrower than the plate portion, and one plate portion is joined to the inner surface of one side plate portion of the terminal base. And bending of the upper end of this one plate The other plate part is elastically pressed into contact with the inner surface of the other side plate part of the terminal base body, and the terminal block body has an opening for inserting and storing the locking terminal in the bottom surface of the terminal storing part. Provided on one side of the terminal accommodating portion with both side edge portions of one side plate portion of the terminal base body and holding one terminal groove portion for holding in a stored state and inserting both side edge portions of one plate portion of the leaf spring. A leaf spring groove for holding in the housed state is provided, and at the position where the inner surface of the other side plate portion of the terminal base faces the other side of the terminal housing in parallel with the insertion area of the electric wire inserted through the electric wire insertion hole. A terminal device for a printed wiring board, characterized in that another terminal groove portion for holding both side edge portions of the other side plate portion in an inserted and stored state is provided.