JP3389798B2 - Wire connection terminal - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire connecting terminal used for connecting a wiring device or the like.

[0002]

2. Description of the Related Art Conventionally, as this type of electric wire connecting terminal, there is one disclosed by Japanese Patent Laid-Open No. 5-34311. As shown in FIG. 7 and FIG. 8, this is a terminal main body having an electric wire insertion hole A ₁ and an internal accommodation portion A ₂ communicating with the electric wire insertion hole A _1.
A, and a measurement piece capable of measuring the insulation resistance through the insulation resistance measurement hole A ₃ that is housed in the inner housing A ₂ and provided in the terminal body A
A terminal plate B provided with B ₁ and a pressure contact portion C ₁ that presses the electric wire X inserted from the electric wire insertion hole A ₁ toward the terminal plate B has a lock piece C ₂ that locks the electric wire X at one end. And a locking spring C provided at each of the other ends, and a blocking portion D ₁ capable of partially blocking the insulation resistance measuring hole A _{3 by} having an unblocked portion.
And a pressing member D capable of pressing C to the electric wire X in a direction to release the locking and pressure contact with the electric wire X.

More specifically, the terminal board B has a portion having a substantially U-shaped cross section by the central piece and both opposing pieces. On the other hand, the opposing piece is a measurement piece B ₁ capable of measuring insulation resistance.

The locking spring C has a locked portion C ₃ which is locked to a locking portion D ₂ provided on the pressing member D near the pressure contact portion C ₁ at one end thereof. This locking spring C has its other end branched into one piece and the other piece, and one of the pieces is a locking piece.
C _2, and the other piece a biasing member C ₄ to the pressing direction a pressing member D when the engagement of the locking portion D ₂ and the locked portion C ₃ is released to urge the opposite direction ing.

The pressing member D is provided with a communication hole D ₃ which can communicate with the insulation resistance measuring hole A ₃ of the terminal body A. A pressed portion D ₄ that is pressed by a tool such as a driver to press the locking spring C 1 is provided at the opening edge of the communication hole D ₃ .

Next, the work of connecting electric wires using the electric wire connecting terminal will be described with reference to FIGS. 7 (a) and 7 (b). Same figure
As shown in (a), when the pressed portion D ₄ is pressed by a tool such as a screwdriver so that the pressing member D rotates clockwise, the pressing member D is pressed by the pressure contact portion C _{1 of the} locking spring C and By pressing the vicinity of the tip of the locking piece C ₂ , the locking spring C 2 is pressed and bent, that is, the electric wire X 1 can be connected. At this time, the locking portion D ₂ of the pressing member D is locked by the locking spring.
This state is maintained by locking the locked portion C ₃ of C. Further, the insulation resistance measuring hole A ₃ of the terminal body A _{1 is} partially closed by the closed portion D ₁ of the pressing member D ₁ having an unclosed portion. Specifically, the unoccluded part is the pressing member D.
It is a communication portion that communicates with the communication hole D _{3 of} , and is formed at one location near the opening edge of the insulation resistance measurement hole A ₃ . This unoccluded part has an elliptical shape when viewed from above.

Next, when the electric wire X is inserted into the electric wire insertion hole A ₁ , the locking spring C is in a bent state, so that the electric wire X can be easily inserted even if the inserting force is small. Thus, when the pressure contact portion C ₁ of the lock spring C is further bent by the insertion of the electric wire X, the locked portion C ₃ of the lock spring C and the lock portion of the pressing member D ₃
The lock with D ₂ is released, and the lock spring C
The urging piece C ₄ urges the pressing member D 1 in the direction opposite to the pressing direction, and the state shown in FIG. At this time, the terminal body A
The insulation resistance measuring hole A ₃ is not blocked by the blocking portion D ₁ of the pressing member D ₁ . Specifically, the communication hole D ₃ of the pressing member D and the insulation resistance measurement hole A ₃ are in communication.

[0008]

In the above-mentioned conventional wire connecting terminal, the terminal body A is pressed when the locking spring C is pressed and bent, that is, when the wire X can be connected. insulation resistance measurement hole a ₃ of the closed portion D ₁ of the pressing member D
As a result, since it has an unblocked portion and is partially blocked, it is unlikely to be mistaken for the wire insertion hole A ₁ .

However, since the unclosed portion of the insulation resistance measuring hole A ₃ is elliptical and is formed at one place, when connecting the electric wire in a relatively dark place, the unclosed portion should be covered. It may be mistaken for the wire insertion hole A ₁ .

The present invention has been made in view of the above points, and an object thereof is to provide an electric wire connecting terminal in which an insulation resistance measuring hole is not mistaken for an electric wire inserting hole.

[0011]

In order to solve the above-mentioned problems, according to a first aspect of the present invention, a terminal main body having an electric wire insertion hole and an inner housing portion communicating with the wire insertion hole, and a terminal housed in the inner housing portion. A terminal plate provided with a measurement piece capable of measuring insulation resistance through the insulation resistance measurement hole provided in the main body, and a pressure contact part that press-connects the wire inserted from the wire insertion hole in the direction of the terminal plate. The locking spring is provided at each of the other ends with a locking piece to be locked, and a blocking portion that has an unblocked portion of the insulation resistance measurement hole and can be partially blocked is provided to the electric wire. A lock member and a pressing member capable of pressing in a direction for releasing the pressure contact, the closed portion is divided into the unclosed portion in plan view, or is surrounded by the unclosed portion. So that the insulation resistance measurement hole is partially blocked There as configuration.

According to a second aspect of the present invention, in the first aspect of the present invention, the locking portion provided on the pressing member locks to hold the pressed state of the lock spring, and at the same time, the lock spring has a predetermined state. It is configured such that locked means for releasing the locking by the locking part by being brought into contact with the electric wire inserted in the position is provided.

A third aspect of the present invention is the one according to the first aspect or the second aspect, wherein a plurality of the pressing members are provided, and the pressing members respectively provided on the pressing members. The terminal main body is cut out to provide a communication portion that allows the pressing portions to communicate with each other.

Further, a fourth aspect is the one according to any one of the first to third aspects, wherein the measuring piece is
The terminal board body is extended toward the insulation resistance measuring hole.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the terminal main body is mounted on the mounting surface thereof, and the wire insertion hole is provided. Is configured to be inclined with respect to the mounting surface.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. This wire connection terminal
The terminal body 1, the terminal plate 2, the locking spring 3, the pressing member 4, and the locked member (locked means) 5 are provided.

The terminal body 1 comprises a body (not shown) having an opening and a cover (not shown). The body and cover are each made of a molding material such as plastic, and when both body and cover openings are closed to form a box, the wire insertion hole 1a, insulation resistance measurement hole 1b, and hole portion 1c are two each. At the same time as it is formed, the internal-package accommodating portion 1d communicating with them is formed. The terminal body 1 is provided with a communication portion 1e, which communicates between the two holes 1c, with a notch. This terminal body 1 is placed on the bottom of a narrow box body having an opening only on one side of a distribution board (not shown) or the like by a placing surface 1f which is one of its outer surfaces. It Then, when this terminal body 1 is mounted on the mounting surface 1f, the wire insertion hole 1a is inclined with respect to the mounting surface 1f.

The terminal plate 2 is formed of a conductive plate of copper alloy or the like, and has a substantially U-shaped terminal plate body composed of a central piece 2a and opposing pieces 2b and 2c. It is housed in the inner housing part 1d in a state of being inserted into the insertion space 20 formed between the 4a. This terminal board 2 is the other facing piece 2c.
A notch 2d is provided at one end of the, and a measurement piece 2e whose insulation resistance can be measured extends from one end of the facing piece. In the assembled state, the measuring piece 2e is in a state of extending toward the insulation resistance measuring hole 1b.

The locking spring 3 is made of a leaf spring material such as stainless steel and is formed into a substantially S-shape. One end of the locking spring 3 and the other end branched into two spring pieces are made to face one facing piece 2b, and an intermediate portion is formed. The part is in contact with the other facing piece 2c, and is mounted inside the terminal plate 2. This locking spring 3 has a wire insertion hole at one end.
The electric wire 10 inserted from 1a serves as a press contact portion 3a that presses the electric wire 10 in the direction of the one facing piece 2b.
Is a locking piece 3b that restricts pulling out by abutting at an acute angle with respect to the pulling-out direction and locking. The other spring piece of the lock spring 3 is the pressing member 4
Is a biasing piece 3c capable of biasing in the direction opposite to the pressing direction. The pressure contact of the locking spring 3 with respect to the electric wire 10 and the locking of the locking member 4 and the urging of the pressing member 4 will be described in detail later.

The pressing member 4 is made of an insulating molding material such as plastic. The pressing member 4 has a forked portion 4a formed by cutting out a central portion of one end corner portion thereof. The pressing member 4 is a bifurcated portion located on the base end side of the locking piece 3b of the locking spring 3 when accommodated in the inner accommodation portion 1d.
The terminal body 1 is rotatably supported by shaft-shaped rotation fulcrums 4b provided on both sides of 4a. This pressing member 4
In the state of being housed in the inner housing portion 1d, it opposes the pressure contact portion 3a and the locking piece 3b of the locking spring 3, and the opposing portion thereof is the locking spring 3
Is a pressing portion 4c capable of pressing the electric wire 10 in the direction of releasing the locking and pressure contact. The lock spring 3 is formed by the pressing portion 4c.
The pressed state of will be described in detail later. This pressing member
By forming the hook 4 into a hook shape, a locking portion 4d that locks with a locked portion 5c of the locked member 5 described later is provided on one of the forked portions 4a. The pressing member 4 has an extending piece 4e extending in parallel with the forked portion 4a from the other end which can be located near the opening of the hole 1c of the terminal body 1. This extension piece 4e is provided with a closed portion 4f which has a non-closed portion and can partially close the insulation resistance measurement hole 1b at the tip end in the extending direction, and the insulation resistance measurement hole is formed in the center thereof. A communication hole 4g that can communicate with 1b is provided. This pressing member 4 has a pressing portion 4c at its extended root portion.
A pressed portion 4h, which is pressed by a tool such as a driver to press the locking spring 3, is provided in a groove shape.

The locked member 5 is a metal plate material thinner than the terminal plate 2 and is supported by being sandwiched between the other facing piece 2c of the terminal plate 2 and the locking spring 3 and the supported piece 5a. Support piece 5a
It has an extending piece 5b extending from, and is formed in a substantially L-shaped cross section. The extended piece 5b of the locked member 5 is provided with a locked portion 5c which is locked by the locking portion 4d of the pressing member 4 by notching and bending the central piece side. There is. The substantially central portion of the extending piece 5b of the locked member 5 is
The contacted portion 5d is abutted by the inserted electric wire 10. The supported piece 5a of the locked member 5 has
An engagement piece 5e that engages with the cut 2d of the terminal plate 2 when sandwiched between the locking spring 3 and the other facing piece 2c of the terminal plate 2 is provided.

Next, the procedure for collectively connecting the two electric wires 10 to the electric wire connecting terminal will be described with reference to FIGS. 1 (a) and 1 (b) and FIG.
It will be explained below based on (a) and (b). Before connecting the wire 10 to the wire connection terminal, position the tool 30 such as a screwdriver on the communication part 1e of the terminal body 1 to
When 4h is pressed simultaneously and the pressing member 4 is rotated toward the locking spring 3, the locking spring 3 pressed by the pressing portion 4c of the rotated pressing member 4 is bent, that is, the electric wire.
As shown in FIG. 1 (a), the locking portion 4d of the pressing member 4 becomes the locked portion of the locked member 5 as soon as 10 can be inserted.
The state is maintained by locking to 5c. At this time, as shown in FIGS. 1 (a) and 2 (a), the opening of the insulation resistance measuring hole 1b has an unclosed portion and is partially closed by the closed portion 4f of the pressing member 4. It becomes a state. For more information,
The unoccluded portion is divided by the obstructing portion 4f in plan view. When connecting the two electric wires 10 one by one, the pressed portion 4h of the pressing member 4 may be individually pressed by the tool 30 such as a driver.

Next, the electric wire 10 is inserted from the electric wire insertion hole 1a of the terminal body 1 in parallel with the one facing piece 2b of the terminal plate 2, but the locking spring 3 is in a sufficiently bent state. Moreover, the electric wire 10 can be easily inserted without increasing the insertion force. Then, when the electric wire 10 is inserted into the predetermined position,
The tip of the electric wire 10 comes into contact with the contacted portion 5d of the locked member 5 to bend the locked member 5. Then,
As shown in FIG. 1 (b), the pressing member 4 releases the lock between the locking portion 4d and the locked portion 5c of the locked member 5, and the biasing piece of the locking spring 3 is released. It is urged in the direction opposite to the pressing direction by 3c and returns. Thus, the pressing portion 4c of the pressing member 4
Is separated from the locking spring 3, that is, the locking spring 3 is not pressed, so the electric wire 10 is pressed by the elastic repulsive force of the locking spring 3 toward the one facing piece 2b by the pressing portion 3a. At the same time, the leading end of the locking piece 3b abuts at an acute angle with respect to the pulling direction of the electric wire 10 and locks the pulling-out restriction.

Next, the procedure for pulling out the electric wire 10 from the electric wire connecting terminal will be described below. By placing a tool 30 such as a screwdriver on the communication part 1e of the terminal body 1,
When 4h is pressed simultaneously and the pressing member 4 is rotated toward the locking spring 3, the locking spring 3 pressed by the pressing portion 4c of the rotated pressing member 4 is sufficiently bent, That is, the electric wire 10 can be pulled out, and as shown in FIG.
As shown in (b) and FIG. 2 (b), the locking portion 4d of the pressing member 4
Is locked to the locked portion 5c of the locked member 5,
That state is retained. When the electric wire 10 is pulled after this state, the electric wire 10 can be easily pulled out. At this time, the insulation resistance measuring hole 1b is communicated with the communication hole 4g of the pressing member 4, and the insulation resistance of the measuring piece 2e of the terminal board 2 can be measured. In addition, two electric wires 10
When connecting books one by one, use a tool 30 such as a screwdriver to
The pressed portions 4h of the pressing member 4 may be pressed individually.

In such an electric wire connecting terminal, the closing portion 4f
In the state where the unblocked portion is divided in a plan view, by partially blocking the insulation resistance measurement hole, the unblocked portion has a large difference in shape from the wire insertion hole 1a.
It is no longer mistaken for 1a.

The locking portion 4d of the pressing member 4 is a locked member.
By locking the locking spring 3 to the locked portion of 5, the locked state of the locking spring 3, that is, the locked state and the pressure-contact released state to the electric wire 10 is released, so that the electric wire 10 can be easily inserted. Moreover, since the locking of the locked member 5 by the pressing member 4 is released by contacting the electric wire 10 inserted in the predetermined position, it is not necessary to perform the work for releasing the locking. It will be fine.

Even if the two pressing members are not pressed one by one, they can be collectively operated by positioning a tool 30 such as a screwdriver on the communication portion 1e of the terminal body which allows the two members to communicate with each other. Since it is possible to press simultaneously at the same time,
Workability is good.

A measuring piece 2e extending from the opposite piece 2b constituting the terminal plate body toward the insulation resistance measuring hole 1b.
Since the space between the device for measuring insulation resistance inserted in the insulation resistance measuring hole 1b is small, the insertion dimension of the device for measuring insulation resistance can be made small, which facilitates the insulation resistance measurement work.

Further, the electric wire insertion hole 1a of the terminal body 1 placed on the placing surface 1f is inclined with respect to the placing surface 1f, so that the electric wire inserting hole 1a is directed toward the operator and the distribution board Even when the wire is placed in such a narrow place and it is difficult to insert the wire in the direction parallel to the mounting surface 1f, the wire can be easily inserted.

In this embodiment, the locking member 4 holds the locked state of the locking spring 3 and contacts the electric wire inserted at a predetermined position to lock the locking portion 4d. Locked member 5 that is unlocked by
However, for example, when the number of wire connection terminals themselves is small and pressing the pressing member 4 does not affect the workability so much even if the pressing member 4 is continuously pressed, the locked member 5 is not provided and the pressing member 4 is pressed. Locking spring by continuing to press member 4
The pressed state of 3 may be maintained, in which case the number of parts can be reduced.

Further, in the present embodiment, the terminal body 1 is provided with the communicating portion 1e for communicating the pressed portions 4h of the pressing member 4 with each other. If pressing 4 individually does not affect workability so much, connect part 1e to terminal body 1
Need not be provided at that time, in which case the processing of the terminal body 1 becomes easier.

In the present embodiment, the measuring piece 2e is extended from the terminal plate body toward the insulation resistance measuring hole 1b. When the insertion dimension is small, it is not necessary to extend from the terminal plate body toward the insulation resistance measuring hole 1b, and in that case, the degree of freedom in processing the terminal plate 2 can be increased.

Further, in this embodiment, the wire insertion hole 1a is
Although it is provided to be inclined with respect to the mounting surface 1f, for example,
Rather than being placed in a narrow place such as a distribution board, if it is not difficult to insert wires from the direction parallel to the placement surface 1f, it should not be inclined with respect to the placement surface 1f. Well,
In that case, the degree of freedom in processing the terminal body 1 can be increased.

Further, in this embodiment, the closed portion 4f of the pressing member 4 is formed so as to divide the unclosed portion when the insulation resistance measuring hole 1b is closed with the unclosed portion. However, even if the unclosed portion is formed in a shape that surrounds the closed portion 4f in a plan view, the same effect can be obtained.

Further, in this embodiment, the locked means is composed of the locked member 5, but it may be integrally provided on the terminal body 1 or the terminal plate 2.

[0036]

According to the first aspect of the present invention, the insulation resistance measuring hole is partially closed in a state where the closed portion divides the unclosed portion in plan view or is surrounded by the unclosed portion. As a result, the unclosed portion has a large difference in shape from the wire insertion hole, and is not mistaken for the wire insertion hole.

According to a second aspect of the present invention, in addition to the effect of the first aspect of the present invention, the locking member is locked to the locked means so that the locking spring is in a pressed state, that is, to the electric wire. Since the lock and the state in which the pressure contact is released are held, the electric wire can be easily inserted, and further, by contacting the electric wire inserted at a predetermined position, the engagement of the pressing member with the locked means. Since the stop is released, the work for releasing the lock is not required.

According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, even if a plurality of pressing members are not pressed one by one in order, By arranging a tool such as a screwdriver in the communication portion of the terminal main body that allows communication between the terminals, it is possible to simultaneously press all at once, which improves workability.

According to a fourth aspect of the present invention, in addition to the effects of the first aspect of the present invention, the measuring piece extending from the terminal plate body toward the insulation resistance measuring hole has an insulation resistance. Since the gap between the device for measuring insulation resistance inserted into the measurement hole is small, the insertion dimension of the device for measuring insulation resistance can be reduced, which facilitates the insulation resistance measurement work.

According to a fifth aspect of the invention, in addition to the effects of the first aspect of the invention, the wire insertion hole of the terminal body mounted on the mounting surface is located on the mounting surface. By being installed in a slanted manner, it will be directed toward the operator, and even if it is placed in a narrow place and it is difficult to insert the wire from the direction parallel to the mounting surface, the wire can be easily inserted. .

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a closed state of an insulation resistance measuring hole when an electric wire is inserted in an embodiment of the present invention.

FIG. 2 is a plan view showing a closed state of an insulation resistance measuring hole at the time of inserting an electric wire in the above.

FIG. 3 is a partial perspective view of the above terminal plate.

FIG. 4 is a perspective view of the above locking spring.

FIG. 5 is a perspective view of the above pressing member.

FIG. 6 is a perspective view of the locked member of the above.

FIG. 7 is a cross-sectional view showing a closed state of an insulation resistance measuring hole at the time of inserting an electric wire in a conventional example.

FIG. 8 is a plan view showing a closed state of the insulation resistance measuring hole when the electric wire is inserted in the above.

[Explanation of symbols]

1 terminal body 1a Wire insertion hole 1b Insulation resistance measurement hole 1d Internal storage 1e Communication part 1f mounting surface 2 terminal board 2e Measuring piece 3 lock spring 3a Pressure contact part 3b lock pieces 4 Pressing member 4d locking part 4f block 4h Pressed part 5 Locked member (locked means) 5c Locked part 10 wires

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshihiro Oido 1048, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. (72) Yasushi Futaba, 1048, Kadoma, Kadoma, Osaka Prefecture (Matsushita Electric Works, Ltd.) 56) References JP-A-5-343111 (JP, A) JP-A-5-275121 (JP, A) JP-A-8-255550 (JP, A) JP-A-54-38573 (JP, A) Flat 6-17092 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01R 4/48

Claims (5)

(57) [Claims] 1. A terminal main body having an electric wire insertion hole and an internal housing portion communicating with the electric wire insertion hole, and a measurement piece capable of measuring insulation resistance through an insulation resistance measuring hole housed in the internal housing portion and provided in the terminal body. A terminal plate, and a locking spring in which a pressure contact portion for pressing the electric wire inserted from the electric wire insertion hole in the direction of the terminal plate is provided at one end with a locking piece for locking the electric wire at the other end, respectively. An electric wire provided with a closing member which has an unclosed portion and which can partially close the insulation resistance measuring hole, and which can press the locking spring in a direction for releasing locking and pressure contact with the electric wire. In the connection terminal, the closed portion is configured to partially close the insulation resistance measurement hole in a state of dividing the unclosed portion in a plan view or in a state of being surrounded by the unclosed portion. Connecting terminal. 2. The locking portion provided on the pressing member holds the pressed state of the locking spring by being locked, and the locking portion is brought into contact with the electric wire inserted at a predetermined position. 2. The electric wire connecting terminal according to claim 1, further comprising a locked means for releasing the locking by. 3. The pressing member is provided in a plurality, and a communication portion for communicating the pressed portions respectively provided on the pressing member is provided by cutting out the terminal main body. The electric wire connection terminal according to claim 1 or 2. 4. The wire connecting terminal according to claim 1, wherein the measuring piece extends from the terminal plate body toward the insulation resistance measuring hole. 5. The terminal main body is mounted on a mounting surface thereof, and the wire insertion hole is provided so as to be inclined with respect to the mounting surface. The electric wire connection terminal according to any one of 4 above.