JP2560111Y2 - Terminal device - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a terminal device used for a printed wiring board and the like, and particularly to a lock terminal to which an electric wire is locked and a lock terminal for releasing the lock connection. For those with a release button.

(Prior Art) Conventionally, for example, a terminal device described in Japanese Utility Model Application Laid-Open No. Sho 62-165670 is known. As this type of terminal device, for example, as in a terminal device for a printed wiring board shown in FIG. An approximately rectangular frame-shaped locking terminal 2 formed by bending a metal plate is fitted, and a pin portion 4 connected to a printed wiring board is formed on the bottom plate portion 3 of the locking terminal 2 by being cut and raised downward. ing.
The lock terminal 2 includes a bottom plate 3 and a pair of side plates.
5, 6 and a leaf spring portion 7 bent from the tip of one side plate portion 5
Are integrally formed. When an electric wire is inserted through an electric wire through hole 8 formed in the upper surface of the terminal block main body 1, the electric wire is connected to the other side plate portion 6 of the lock terminal 2 and the plate. It is configured to be locked and connected between the tip of the spring portion 7. A release button 10 is slidably supported in a vertical direction in a button through hole 9 formed in the upper surface of the terminal block main body 1. When the release button 10 is pressed downward, the release button 10 is pressed. As a result, the leaf spring portion 7 is pressed downward and separates from the electric wire, the lock on the electric wire is released, and the electric wire is pulled out.

In the conventional terminal device for a printed wiring board, the button through hole 9 of the terminal block main body 1 and the release button
Fitting portion slidably fitted in button through hole 9 in 10
In the case of No. 11, the horizontal cross-sectional shapes were all rectangular and were the same.

The reason why the cross-sectional shape is rectangular is to prevent rotation. Further, in order to release the lock on the electric wire, that is, to perform the release button normally and without variation between products, dimensional accuracy is required, and inevitably the periphery of the button through hole 9 of the terminal block body 1 is required. The gap between the surface and the fitting portion 11 of the release button 10 must be reduced.

By the way, the terminal device is used in a state of being attached to a printed wiring board, and is soldered to the printed wiring board. And penetrates into the gap between the release button 10 and solidifies. However, as described above, when the clearance between the peripheral surface of the button through hole 9 and the release button 10 is reduced in order to prevent the release button 10 from rattling, the flux solidified in this clearance causes the release button 10 In the worst case, the release button 10 would not be able to move due to the state of adhesion.

(Problem to be Solved by the Invention) As shown in Japanese Utility Model Application Laid-Open No. Sho 62-165670 and FIG. 8, in a terminal device having a release button, a button through hole of a terminal block main body is used during soldering. Flux that evaporates into the narrow gap between the release button and the release button enters and solidifies.However, conventionally, the cross-sections of the button through hole and the release button have the same shape. Since the sliding area with the button was large, there was a problem that the slidability of the release button was significantly impaired due to solidification of the flux or the like. To prevent this, it is conceivable to widen the gap between the button through-hole and the release button, but then the release is performed normally due to a decrease in the fitting accuracy between the button through-hole and the release button. It may disappear.

The present invention is intended to solve such a problem, and does not reduce the fitting accuracy between the button through hole of the terminal block main body and the release button. It is an object of the present invention to provide a terminal device capable of preventing a decrease in slidability.

(Means for Solving the Problems) In the present invention, a terminal block main body having an electric wire through hole, and an electric wire built in the terminal base body and inserted into the electric wire through hole from the outside are detachably locked. A lock terminal, and a release button that is slidably supported by the terminal block body and presses the lock terminal to release the lock on the electric wire,
A button through hole having a substantially polygonal cross section is formed in the terminal block main body; a fitting portion having a substantially polygonal cross section that is slidably fitted into the button through hole is formed in the release button; Along the movement direction, the peripheral surface of the button through-hole and the fitting portion are brought into planar contact with each other to regulate the movement of the release button in directions other than the sliding direction, and the button through-hole and the fitting are formed. A relief recess is formed in at least one corner of the portion, and a gap is formed in a part between the peripheral surface of the button through hole and the fitting portion.

(Operation) In the terminal device of the present invention, the electric wire is inserted into the electric wire through-hole from the outside and is locked and connected to the locking terminal in the terminal block main body. Also,
To release the locked wire, the release button is pressed and slid into the terminal block body, the release button is pressed against the lock terminal, and the wire is pulled out while unlocking the wire. By the way, the release button has its fitting portion slidably fitted in the button through hole of the terminal block main body. For example, when the lock terminal is soldered to the printed wiring board, the vapor of the flux is removed. May enter between the peripheral surface of the button through hole and the fitting portion of the release button, where the flux may be solidified. But,
In the button through hole and the fitting part, an escape recess is formed in at least one corner of the button through hole and the fitting part along the sliding direction, and the clearance between the peripheral surface of the button through hole and the fitting part is formed. Since a gap is formed in a part of the gap, a decrease in the slidability of the release button due to solidification of the flux is reduced. In addition, although there is a gap between the peripheral surface of the button through hole and the fitting portion, the escape recess is formed at the corner, and the peripheral surface of the button through hole and the fitting portion are formed along the sliding direction. Are in planar contact with each other enough to restrict the movement of the release button in directions other than the sliding direction, so that the release button is prevented from rattling, and the release is performed normally. Furthermore, by forming the recessed recesses at the corners, compared to a configuration in which the recessed recesses are formed in a plane, for example, when molding the resin using a mold, the corners that hinder the flow of the resin material and the removal of the product from the mold. The formation of a portion is suppressed, resin molding and the like are facilitated, and a miniaturized terminal device suitable for, for example, a printed wiring board can be manufactured.

(Embodiment) Hereinafter, a configuration of an embodiment of the terminal device of the present invention will be described with reference to FIGS. 1 to 4. The terminal device of this embodiment is for a printed wiring board.

Reference numeral 21 denotes a terminal block main body formed of an insulator such as a synthetic resin such as polyamide. The terminal block main body 21 has a box shape with an open lower surface. In addition, the terminal block body 21
The inside is partitioned into a pair of right and left substantially rectangular parallelepiped terminal storage chambers 23 by a partition wall 22 formed at the center in the left-right direction.
A pair of left and right electric wire through holes 24 are formed in the upper surface of the terminal block main body 21 facing the terminal storage chambers 23 in the vertical direction on the rear side, and a pair of right and left button through holes 25 are formed. Is formed on the front side in a vertical direction. The wire passage hole 24 has a round hole shape and a lower portion is tapered downward. The button through-hole 25 is a rectangular hole having a substantially rectangular horizontal cross section, and has an inclined surface 26 descending rearward at a lower portion of the rear surface. Further, the two button through holes
In the left and right corners of the front side of 25, escape recesses 27 are formed, which form gaps and escape vertically.

Further, on the upper surface of the terminal block main body 21, wall bodies 28 are formed to protrude vertically on the left and right sides of the button through holes 25, respectively. These walls 28 are provided with the button through holes.
It protrudes forward, rearward and upward from 25.

A pair of left and right locking holes 31 are formed through the front surface of the terminal block main body 21 so as to face the terminal storage chambers 23, respectively. Grooves 32 and 33 are formed in the front and rear edges of the left and right side surfaces in each of the terminal storage chambers 23 so as to be recessed, respectively. Further, a positioning projection 34 extending in the up-down direction is formed on the upper front surface in each of the terminal storage chambers 23, respectively.

Further, on the outer side surface on the right side when viewed from the front of the terminal block main body 21, a connecting convex portion 36 that widens outward is formed. On the other hand, on the left outer surface of the terminal block main body 21, a connecting concave portion 37 with which the connecting convex portion 36 of the other terminal block main body 21 is engaged is formed.

Reference numeral 41 denotes a pair of left and right locking terminals. Each of the locking terminals 41 is made of a two-layer clad steel having a highly elastic stainless steel substrate material and a highly conductive copper one-side coating material on the copper side. Are formed by press working or the like so as to be an inner surface.

Each of the lock terminals 41 has a substantially rectangular bottom plate portion.
42, a pair of side plate portions 43, 44 vertically bent from the front and rear edges of the bottom plate portion 42, respectively, and these side plate portions 43,
A plate spring portion 45 that is bent smoothly and at an acute angle from the tip edge of one front side plate portion 43 on the front side to the other side plate portion 44 on the rear side of 44 is integrally formed. It is formed in a substantially rectangular frame shape when viewed. The leaf spring portion 45 is in a natural state, and its front end is pressed against the inner surface of the rear side plate portion 44. The width in the left-right direction of the bottom plate portion 42 and the leaf spring portion 45 is slightly smaller than the width in the left-right direction of both side plate portions 43, 44. Further, the leaf spring 45
Is slightly smaller than the opening distance of the groove portions 32 and 33 opposed to each other. Each of the lock terminals 41 is fitted into each of the terminal storage chambers 23 of the terminal block main body 21, and the left and right side edges of each of the side plate portions 43 and 44 are connected to the respective terminal storage portions. The leaf spring 45 is inserted into each of the grooves 32 and 33 of the chamber 23, and the distal end of the leaf spring 45 is located below the electric wire passage 24.

Further, a front locking piece 46 to be engaged with the locking hole 31 of the terminal block main body 21 is formed at one of the left and right side edges of the front side plate portion 43 by cutting and raising the upper side as a base side. On the other hand, the left and right side edge portions of the rear side plate portion 44 are provided with the terminal block main body.
Rear locking pieces 47 which are pressed against the rear surface of the inside 21 are formed by cutting and raising the upper side as the base side.

Further, at the center of the front side plate portion 43, a stopper piece 48 for preventing the leaf spring portion 45 from being excessively deformed is formed by cutting and raising the lower side as a base side and forming an acute angle. The stopper piece 48 extends toward the leaf spring portion 45, and the distal end of the stopper piece 48
Opposed from the opposite side to 24. In the lock terminal 41, a hole 49 formed by cutting and raising the stopper piece 48 extends to the base of the leaf spring part 45 and is engaged with the positioning projection 34 on the inner surface of the terminal block main body 21. Things.

A pin portion 50 for connection to a printed wiring board (not shown) is formed in the bottom plate portion 42 by being vertically cut and raised.

Reference numeral 51 denotes a pair of left and right release buttons formed of an insulator such as a synthetic resin such as polyamide, and the release buttons 51 are respectively supported through the respective button through holes 25 of the terminal block main body 21 so as to be slidable in the vertical direction. ing. The fitting portion 52 slidably fitted in the button through hole 25 at the upper part of the release button 51 is in the form of a rectangular column having a rectangular horizontal cross section. Are almost equal to the respective dimensions. However, since the button recess 25 has a recess 27, and the button recess 25 and the fitting portion 52 have different horizontal cross-sectional shapes, the button recess 25 is fitted to the peripheral surface of the button recess 25 in the recess 27. A gap is formed between the portion 52 and the vertical portion. On the other hand, at positions other than the escape concave portion 27, the peripheral surface of the button through hole 25 and the fitting portion 52 are in vertical contact with the front, rear, left, and right surfaces, and the release button 51 is moved in a direction other than the vertical direction. Is being regulated.

An inclined portion 53 is formed below the release button 51 along the inclined surface 26 of the button through hole 25.
The inclined portion 53 can be elastically contracted in the left-right direction by a cut groove 54. A pressing portion 55 formed on the lower rear side of the inclined portion 53 is in contact with the leaf spring portion 45 of the lock terminal 41 from above. The left and right sides of the pressing portion 55 protrude to the left and right sides beyond the fitting portion 52 and the inclined portion 53, and the left and right sides of the pressing portion 55 engage with the upper surface in each of the terminal storage chambers 23. Then, the release button 51 is prevented from coming off with respect to the terminal block main body 21. Further, a flange portion 56 for preventing immersion is formed at an upper end portion of the release button 51 projecting upward from the button through hole 25. Further, an engagement recess 57 for tool engagement is formed on the upper surface of the flange portion 56.

A concave recess 58 is formed on the rear surface of the fitting portion 52 of each of the release buttons 51, but this is for protrusion during molding.

Further, portions of each of the release buttons 51 protruding outward from the terminal block main body 21 are entirely covered by the two pairs of walls 28 from the left and right sides, respectively.

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

At the time of assembly, each release button 51 is inserted into each button through-hole 25 of the terminal block main body 21 from above and outside. Then, the inclined portion 53 of the release button 51 is once reduced in width, the left and right sides of the pressing portion 55 pass over the button through-hole 25, and are engaged with the upper surface in each terminal storage chamber 23.

In addition, a pair of lock terminals 41 are fitted into the respective terminal storage chambers 23 of the terminal block main body 21 from the front end sides of the both side plate portions 43 and 44 via the lower surface openings. Along with this, both left and right side edges protruding from the leaf spring portion 45 in each side plate portion 43, 44 are inserted into the grooves 32, 33 of each terminal storage chamber 23, respectively, and the stopper piece 48 in the front side plate portion 43 is provided. The positioning protrusion 34 is fitted into the hole 49 of the cut-and-raised trace. When the fitting is completed, the locking pieces 46 of the front side plate 43 are engaged with the locking holes 31 of the terminal block main body 21. At the same time, the locking piece 47 of the rear side plate portion 44 is pressed against the rear surface inside the terminal block main body 21, and the lock terminal 41 is firmly held and fixed to the terminal block main body 21.

In this assembled state, when the leaf spring 45 is pressed from above by the release button 51, the tip of the leaf spring 45 is positioned slightly away from the inner surface of the rear side plate 44.

 Next, the use of the terminal device will be described.

If necessary, the plurality of terminal block main bodies 21 are connected side by side in the left-right direction by engaging the connection protrusions 36 and the connection recesses 37.

Then, the terminal device is mounted on the printed wiring board.
That is, the pin portion 50 of the bottom plate portion 42 of the lock terminal 41 is mechanically and electrically connected to the printed wiring board by soldering.

Further, at the time of electric wire connection, the electric wire 61 is inserted into the terminal block main body 21 from the upper outside through the electric wire through hole 24. Then,
The electric wire 61 is elastically sandwiched between the inner surface of the rear side plate portion 44 on the rear side of the lock terminal 41 and the tip of the leaf spring portion 45, and the lock terminal
Locked to 41. At this time, the leaf spring portion 45 is bent and deformed in a direction away from the rear side plate portion 44. Then, in this state, the electric wire 61 is mechanically held by the leaf spring portion 45, and is electrically connected to the printed wiring board through the rear side plate portion 44 and the bottom plate portion 42, in particular.

To release the locked wire 61, the upper surface outside the release button 51 is pushed downward, and the release button 51 is slid toward the inside of the terminal block main body 21. Then, the leaf spring portion 45 is pressed downward by the release button 51, and the leaf spring portion 45 is elastically displaced and separated from the electric wire 61,
Since the lock on the electric wire 61 is released, the electric wire 61 is pulled out in this state.

By the way, the release button 51 has its fitting portion 52 slidably fitted in the button through hole 25 of the terminal block main body 21 in the vertical direction. When soldering to the board, the evaporated flux, etc., will be
Infiltrate and solidify. However, a clearance along the vertical direction is formed in a part between the peripheral surface of the button through hole 25 and the fitting portion 52 by the escape recess 27 in the button through hole 25, and the peripheral surface of the button through hole 25 is formed. Because the sliding area between the release button 51 and the fitting portion 52 is smaller than before, the decrease in the slidability of the release button 51 is reduced. That is, even if the contact portion between the peripheral surface of the button through hole 25 and the fitting portion 52 is bonded by solidified flux or the like, no adhesion occurs in the escape recess 27, so that the release button Reduction in slidability is reduced.

In addition, although there is a recess 27, as shown in FIG. 1 and the like, the peripheral surface of the button through hole 25 and the fitting portion 52 are in planar contact with the front, rear, left and right four surfaces along the vertical direction, Button through hole 25
Since the fitting accuracy between the release button 51 and the release button 51 is high, the movement of the release button 51 other than in the vertical direction is reliably restricted. Therefore, the play of the release button 51 is reliably prevented, so that the release of the lock on the electric wire 61, that is, the release is performed normally and without variation among products.

Next, another embodiment of the present invention will be described with reference to FIGS.

In this embodiment, escape recesses 71 are formed at the left and right corners on the front side of the fitting portion 52 of the release button 51 so as to escape vertically. Further, chamfered portions 72 are formed on both left and right sides of the rear surface of the pressing portion 55 of the release button 51, respectively.

According to the configuration of the other embodiment, the same operation and effect as the previous embodiment can be obtained.

That is, at least one of the corners of the button through hole 25 of the terminal block main body 21 and the fitting portion 52 of the release button 51 is partially concave or convex so that the button through hole
It is sufficient that the horizontal cross-sectional shape is made different between the fitting portion 52 and the fitting portion 52, and a gap is formed in a part between the peripheral surface of the button through hole 25 and the fitting portion 52.

In addition, in order to restrict the movement of the release button 51 in directions other than the vertical direction, as described above, the peripheral surface of the button
In addition to contacting the outer surface 52 with the front, rear, left, and right surfaces along the vertical direction, the peripheral surface of the button through hole 25 and the fitting portion 52 may be contacted along the three surfaces not parallel to each other along the vertical direction. .

Incidentally, in FIG. 1, the pressing portion 55 of the release button 51
Although the rear surface of the lock terminal 41 is illustrated as being separated from the rear side plate portion 44 on the rear side of the lock terminal 41, the stability is better when the rear surface of the pressing portion 55 is applied to the lock terminal 41 in practice. But in that case,
When the vapor of the flux enters between the rear surface of the pressing portion 55 and the lock terminal 41 during the soldering and solidifies here, the slidability of the release button 51 is impaired.

On the other hand, as in the other embodiments, the chamfered portion 72 is formed on the rear surface of the pressing portion 55 of the release button 51, so that the sliding area between the rear surface of the pressing portion 55 and the lock terminal 41 is reduced. If
A decrease in the slidability of the release button 51 due to solidification of flux or the like between the rear surface of the pressing portion 55 and the lock terminal 41 can be reduced.

In the above-described embodiment, the structure in which the pair of lock terminals 41 are provided in one terminal block main body 21 has been described, but only one lock terminal 41 may be provided in one terminal base body 21. And three or more locking terminals in one terminal block body 21.
41 may be juxtaposed.

(Effects of the Invention) According to the present invention, in a terminal device in which a fitting portion of a release button is slidably fitted in a button through hole of a terminal block main body, each of the button devices is fitted with a button through hole having a substantially polygonal cross section. A relief recess is formed in at least one corner of the button through hole and the fitting portion along the sliding direction, and a gap is formed in a part between the peripheral surface of the button through hole and the fitting portion. Thus, even if flux evaporated during soldering enters between the peripheral surface of the button through hole and the fitting portion and is solidified, it is possible to reduce a decrease in the slidability of the release button. In addition, although there is a gap between the peripheral surface of the button through hole and the fitting portion, the escape recess is formed at the corner, and the peripheral surface of the button through hole and the fitting portion are formed along the sliding direction. Contacted the surface enough to restrict the movement of the release button in directions other than the sliding direction.
The rattling of the release button can be prevented, and the lock of the electric wire can be released normally and without variation between products. Furthermore, by forming the recessed recesses at the corners, compared to a configuration in which the recessed recesses are formed in a plane, for example, during resin molding using a mold, the flow of the resin material and the work of removing from the mold It is possible to improve the performance and facilitate resin molding and the like, and to easily manufacture a miniaturized terminal device suitable for, for example, a printed wiring board.

[Brief description of the drawings]

FIG. 1 is a plan view, partially in section, showing an embodiment of the terminal device of the present invention, FIG. 2 is a front view of the same, FIG.
FIG. 4 is a sectional view taken along line aa of FIG. 4, FIG. 4 is a sectional view taken along line bb of FIG. 3, and FIG. 5 is a plan view partially showing another embodiment of the terminal device of the present invention. 6 is a rear view of the release button, FIG. 7 is a bottom view of the release button, FIG. 8 is a longitudinal sectional view showing an example of a conventional terminal device, and FIG. FIG. 21 ... terminal block main body, 24 ... electric wire through hole, 25 ... button through hole, 27 ... escape recess forming a gap, 41 ... lock terminal,
51 ... release button, 52 ... fitting part, 61 ... wire.

Claims (1)

(57) [Scope of request for utility model registration] A terminal block body having an electric wire through-hole, a locking terminal which is incorporated in the terminal block main body and which is detachably locked with an electric wire inserted into the electric wire through hole from the outside; A release button that is slidably supported by the main body to release the lock on the electric wire by pressing the lock terminal; forming a button through-hole having a substantially polygonal cross section in the terminal base body; A button is formed with a fitting portion having a substantially polygonal cross section which is slidably fitted into the button through hole, and the peripheral surface of the button through hole and the fitting portion are formed along the sliding direction. The release button is brought into planar contact only to regulate the movement of the release button in a direction other than the sliding direction, and an escape recess is formed in at least one corner of the button through-hole and the fitting portion. The fact that a gap was formed in a part between the peripheral surface and the fitting part Characteristic terminal device.