JP3255082B2 - Wiring connection structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring connection structure in which terminals of external wiring leads are connected to terminal fittings via terminal screws.

[0002]

2. Description of the Related Art In a wiring connection structure as described above,
A Y-shaped or round crimp terminal is attached to the end of the lead for external wiring, and the crimp terminal is inserted between a terminal fitting fixed to the case and a washer provided for a terminal screw, and tightened and fixed.

[0003]

The Y-shaped crimp terminal is
The terminal screw can be inserted and removed from the side between the washer and the terminal fitting without completely removing the terminal screw from the terminal fitting, which has the advantage of easy wiring work.
Crimping terminals are easily pulled out due to insufficient tightening or loosening of terminal screws, and have been used when the strength of the wiring connection is not so required. In addition, the round crimp terminal has the advantage that the strength of the wire connection is high without the risk of falling out due to insufficient tightening or loosening of the terminal screw, but the terminal screw must be removed from the terminal fitting. If the crimp terminal cannot be inserted or removed, the wiring connection work is troublesome. In particular, the operation of screwing the terminal screw into the screw hole of the terminal fitting while positioning the crimp terminal has been troublesome.

The present invention has been made in view of such a point, and a main object of the present invention is to provide a wiring connection structure capable of easily and easily performing wiring connection using a round crimp terminal. And

[0005]

In order to achieve the above object, the present invention has the following arrangement.

[0006] The invention according to claim 1, the case, only set the screw supporting portion for resiliently retaining the terminal screws at a position is spaced withdrawn from the terminal fitting which is fixed and mounted on said casing, said end
The female screw is equipped with a washer.
Guide means for guiding engagement so as to be movable in and out of proximity
And the guide means is extended from the washer.
A guide piece is provided in the case to guide the guide piece in sliding contact.
And the screw support portion is provided with the washer.
It is configured to act on.

According to a second aspect of the present invention, in the first aspect of the invention, the screw support portion is integrally formed with the resin case.

The invention according to claim 3 is the invention according to claim 1 or 2
In the invention, the case is a push button switch.
Case.

[0009]

[0010]

According to the first aspect of the present invention, when the terminal screw is pulled out of the terminal fitting upward, separated and elastically engaged with the screw supporting portion, the terminal screw is placed in a position facing the screw hole of the terminal fitting. As a result, the round crimped terminal attached to the tip of the lead can be inserted or removed from the gap formed between the terminal fitting and the terminal screw, while the terminal screw is in place. It is held and does not fall on the terminal fittings.

Then, if a crimp terminal is inserted between the terminal fitting and the terminal screw and the terminal screw is screwed in, the screw can be tightened into the screw hole of the terminal fitting. In addition,
When removing the screws from the terminal fittings and separating
The washer moves in a fixed position and strikes the screw support precisely.
Sex locked. In addition, the position and orientation of the washer must be stable.
The position and orientation of the terminal screw with this attached is also stable
The next time you screw in the terminal screws,
Do not align the terminal screws with the screw holes on the terminal fittings.
Also, screwing the terminal screw into the screw hole
Can be screwed and inserted. Moreover, it extends from the washer
The projected guide piece slides and moves along the guide surface of the case
Then, the washer floating from the terminal fitting is held in a fixed posture.

According to the second aspect of the present invention, the screw supporting portion can be provided at the same time as the case is formed, and the screw supporting portion can be elastically deformed by the elastic action of the resin material.

According to a third aspect of the present invention, a push button switch is provided.
Switch.

[0015]

[0016]

[0017]

1 is a longitudinal sectional front view of a push button switch to which the present invention is applied, FIG. 2 is an external perspective view thereof, and FIG. 3 is an exploded perspective view of a main part. ing.

The push-button switch of this embodiment is of a normally-open contact type, and a movable one terminal 4 is connected to a pair of terminal fittings 2 assembled and fixed in a case 1 via a push button 3. Displace the fixed contact 2a of the terminal fitting 2
, The movable contact 4a of the movable terminal 4 is brought into contact with and separated from the movable contact 4a.

The case 1 has a front and rear split structure including a resin-molded case main body 1a and a cover case 1b joined to the front surface of the case main body 1a and connected and fixed by the caulking pins 5 of the case main body 1a. Each part of the case 1 described in (1) is also formed separately in the front and rear and provided in each of the case main body 1a and the cover case 1b, and is joined back and forth to provide a desired function.

On the left and right sides of the case 1, rectangular terminal mounting portions 6 are formed, into which terminal fittings 2 bent in a U-shape are fitted and fixed. An open wiring connection space 7 is formed,
One end surfaces of both terminal fittings 2 are exposed in the wiring connection space 7.

In the center of the case 1, a central groove 8 and a central opening 9 for mounting the push button 3 so as to be able to slide in and out are formed, and the push button 3 mounted here is provided in the inner part of the central groove 8. The return spring 10 is urged to slide in the projecting direction.

The movable terminal 4 is supported by the push button 3 so as to be vertically movable within a set range.
The push button 3 is pressed down against the return spring 10 and the movable contact 4a of the movable terminal 4 is fixed to the fixed contact 2a of the terminal fitting 2.
When the push button 3 is further pushed and displaced after being pressed into contact with the movable terminal 4, the movable terminal 4 is displaced backward against the spring 11, thereby absorbing the pushing stroke.

A screw hole 2b is formed in one end surface of the terminal fitting 2 exposed in the wiring connection space 7, and the terminal screw 1 is formed therein.
2 is screwed in. A square washer 13 is undetachably attached to the terminal screw 12, and a guide piece 14 is bent and extended from one end of the washer 13, and the guide piece 14 is formed by cutting out a tip of the terminal fitting 2. The washer 13 is engaged with the recess 15 so that the washer 13 is attached to the terminal fitting 2 in a fixed posture.

The terminal mounting portion 6 of the case 1 is provided with a guide groove 16 for engaging the guide piece 14 of the washer 13, and a guide surface for slidingly guiding the guide piece 14 is provided laterally outside the central groove 8. 17 is formed, and as the terminal screw 12 is operated to withdraw or move with respect to the terminal fitting 2, the washer 13 is guided and moved in parallel while maintaining a fixed posture. I have.

An operation hole 18 for inserting a tool and rotating the terminal screw 12 of the wiring connection space 7 is formed at an end of the case 1.
The screw support 19 projecting in a cantilever manner toward the case 1
And are formed integrally.

The screw support 19 can be elastically deformed to the left and right. When the terminal screw 12 is pulled out of the terminal fitting 2 into the wiring connection space 7, one end of the washer 13 moved with this is screwed to the screw support. The upper end 19a of the inner surface of the 19-shaped chevron is elastically held. And washer 13
Is elastically locked, the head of the terminal screw 12 is inserted into the operation hole 18 and the tip of the screw portion is connected to the terminal fitting 2.
From the screw hole 2a.

Therefore, even when the terminal screw 12 is used upward as shown in the figure, the terminal screw 12 is pulled out of the terminal fitting 2 into the wiring connection space 7 and the screw support portion 19 is removed.
The terminal screw 12 can be held elastically by holding the
An appropriate gap can appear between the tip of the lead 21 and the terminal fitting 2. As shown in FIG. 2, the round crimp terminal 22 provided at the tip of the lead 21 is placed on the side of the wiring connection space 7. And then tighten the terminal screw 12 to insert the terminal fitting 2
Can be connected to

In the state where the terminal screw 12 is used downward, even if the terminal screw 12 is pulled out of the terminal fitting 2 into the wiring connection space 7, the washer 13 is locked by the edge of the operation hole 18 and falls off. In the same manner as in the upward use state, the round crimp terminal 2 is inserted into the wiring connection space 7 from the side.
2, the lead 21 can be connected or pulled out.

That is, not only when the terminal screw is used upward but also when the terminal screw is used downward, the terminal screw can be carried out with good handling without fear of dropping or being lost. It will be excellent in property.

FIG. 4 shows an embodiment in which the wiring connection portion of the present invention is applied to a normally closed contact type push button switch. The shape of the terminal fitting 2 and the biasing direction of the movable terminal 4 are shown in FIG. Except for the difference, the basic configuration and functions are the same as those of the previous example. Therefore, the same or equivalent functional components and parts as those of the previous example are denoted by the same reference numerals as those of the previous example, and the description thereof will be omitted.

The present invention can be modified and implemented as follows.

The screw support portion 19 is mounted on the case 1 as a separate component using a spring material or the like.

As guide means for moving the washer in a fixed posture, a pair of guide sides 1
4 are bent and extended, and each is guided by a guide surface or a guide groove formed in the case 1.

A pair of screw locking portions 19 are provided for one terminal screw 12, and the opposite end sides of the washer 13 are stably locked and held by both screw locking portions 19.

It goes without saying that a lead having a Y-shaped crimp terminal can be used for connection. In this case, wiring connection can be made without intentionally removing and removing the terminal screw 12.

The present invention is not limited to a push button switch, and can be applied to various electric devices connected by wiring using terminal screws.

[0037]

As is clear from the above description, the following effects can be expected according to the present invention.

According to the first aspect of the present invention, the terminal screw pulled out of the terminal fitting can be elastically engaged with the screw support and held at a fixed position separated from the terminal fitting, so that the connection strength can be maintained. Wiring connection with a round crimp terminal with high height has been made easier. Moreover, the terminal screw and this
The position and orientation of the washer that moves with the
The washer is securely locked to the support
The following screwing operation can be performed casually, and the locking performance
And the screwing operability is improved. I
Guiding means that can accurately guide the washer is simple and inexpensive.
Can be manufactured for a price. According to the second aspect of the present invention, by forming the elastically deformable screw support portion with the resin integrally with the case, a wiring connection portion exhibiting the above-described effect can be manufactured at low cost.

According to the third aspect of the present invention, a push button is provided.
It can be suitably implemented for a switch.

[0040]

[0041]

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view of a normally open contact type push button switch.

FIG. 2 is an external perspective view of a push button switch.

FIG. 3 is an exploded perspective view of a main part.

FIG. 4 is a longitudinal sectional front view of a normally-closed contact type push button switch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Terminal fitting 12 Terminal screw 13 Washer 14 Guide piece 17 Guide surface 18 Operation hole 19 Screw support

Continuation of the front page (56) References JP-A-8-153438 (JP, A) JP-A-3-176918 (JP, A) Japanese Utility Model Application No. Sho 62-175572 (JP, U) Japanese Utility Model Application No. Sho 62-79362 (JP , U) Fully open 1987-48668 (JP, U) Fully open 1986-1127 (JP, U) Fully open 1960-96779 (JP, U) Fully open 1984-63970 (JP, U) Fully open 59-63969 (JP, U) Fully open 1983-107581 (JP, U) Really open, 64-34723 (JP, U) Fully open, 5-79825 (JP, U) Fully open, 62-131370 (JP, U.S.A.) U) Japanese Utility Model 1981-46367 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01H 9/00-9/28 H01H 13/04 H01R 4/38

Claims (3)

(57) [Claims] 1. A wiring connection structure for connecting a wiring terminal to a terminal fitting fixedly mounted on a case by using a terminal screw, wherein the case is configured such that the terminal screw is extracted from the terminal fitting. threaded support part for elastic locking is provided <br/> et al is in the moved away position, in the terminal screws, washers is equipped, constant figure the washer
Guide means for guiding engagement so as to be able to approach and separate by force
And extending the guide means from the washer.
Case that guides out the guide piece and guides this guide piece in sliding contact
And a guide surface provided in the screw support portion.
A wiring connection structure characterized by acting on a washer . 2. The wiring connection structure according to claim 1, wherein said screw support portion is formed integrally with said resin case. 3. The case is provided with a push button switch housing.
Wiring connection structure according to claim 1 or 2 wherein the over scan.