JPH10334756A - Wiring connection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply, easily conduct the wiring connection of a lead using a round crimp-style terminal in an appliance constituted so that an outside wiring lead is connected to a terminal fixture through a terminal screw. SOLUTION: A washer 13 mounted on a terminal screw 12 in such a state that the terminal screw 12 is drawn out and separated from a terminal fixture 2 fixed to a case 1 is elastically locked for positioning with a screw supporting part 19 integrally formed in the case 1. A guide piece 14 extended from the washer 13 in the screw axis direction is guided with a guide surface 17 formed in the case 1, and the washer 13 is approached to or separated from the terminal fixture 2 in the constant attitude.

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.
The crimping terminal is likely to come off due to insufficient tightening or loosening of the terminal screw, and has 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 wiring 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.

According to the first aspect of the present invention, the case is provided with a screw support portion that elastically locks the terminal screw at a position where the terminal screw is pulled out from and separated from the terminal fitting fixedly mounted on the case.

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 of (1), guide means is provided for engaging and guiding the washer so as to be able to approach and separate in a constant posture, and the screw support portion is configured to act on the washer.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the guide means includes a guide piece extending from the washer and a guide surface provided in a case for guiding the guide piece in sliding contact. It is configured.

The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the case is a case of a push button switch.

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.

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 the third aspect of the present invention, when the terminal screw is pulled out of the terminal fitting and is separated therefrom, the washer provided on the terminal screw moves in a fixed posture and is accurately elastically engaged with the screw support. In addition, since the position and orientation of the washer is stabilized, the position and orientation of the terminal screw to which the washer is attached are also stabilized, and the next time the terminal screw is screwed in, the terminal screw is inserted into the screw hole of the terminal fitting. The terminal screw can be screwed into the screw hole and inserted by simply screwing it in without any need for alignment.

According to the fourth aspect of the present invention, the guide piece extending from the washer is slidably moved along the guide surface of the case,
The washer floating from the terminal fitting is held in a fixed posture.

According to the configuration of the fifth aspect, the present invention can be suitably applied to a push button switch.

[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.

Rectangular terminal mounting portions 6 are formed on the left and right sides of the case 1, 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 the screw is connected 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 2 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. 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, the position and posture of the terminal screw and the washer that moves with the terminal screw are always stable, the washer is securely locked to the screw support portion of the washer, and the next screwing is performed. The operation can be performed casually, the locking performance is stabilized, and the screwing operability is improved.

According to the fourth aspect of the present invention, the guide means capable of accurately guiding the washer can be manufactured easily and at low cost.

According to the fifth aspect of the present invention, the present invention can be suitably applied to a push button switch.

[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

Claims (5)

[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. A wiring connection structure, wherein a screw support portion that elastically locks at a separated position is provided. 2. The wiring connection structure according to claim 1, wherein said screw support portion is formed integrally with said resin case. 3. The terminal screw is provided with a washer, and guide means for engaging and guiding the washer so as to be able to approach and separate in a fixed posture, and causes the screw support portion to act on the washer. Item 3. The wiring connection structure according to Item 1 or 2. 4. The wiring connection structure according to claim 3, wherein said guide means comprises a guide piece extending from said washer and a guide surface provided in a case for guiding said guide piece in sliding contact. 5. The wiring connection structure according to claim 1, wherein the case is a case of a push button switch.