JPH05326052A - Connection terminal and terminal block for connection thereof - Google Patents

Abstract

PURPOSE:To attach/detach a connection terminal easily and surely in a short time in relation to the connection terminal attached to a cable end and a terminal block for connection of the terminal. CONSTITUTION:A connection terminal 1 is constituted of a conductive piece 2b provided at both opened ends thereof with cut-out grooves 2b-1 for inserting a compression coil spring 3 of the connection terminal 1 from a side; and an insulative block 2a provided with a guide groove 2a-2 for inserting the conductive piece 2b with a straight line-shape projection part thereof being held in the straight line direction from a side into an insertion face of a connection beam partitioned by a beam partitioning wall 2a-1, and a counter bored round hole 2a-3 allowing the straight line-shape projection part to turn, both being communicated with each other. When a terminal connection part of the connection terminal 1 is inserted between the insertion face and the conductive piece 2b, and a knob is turned at a position of the counter bored round hole 2a-3, the terminal connection part is brought into pressure contact with the conductive piece 2b because of sliding engagement of slant faces with each other and simultaneously the straight line-shape projection part is engaged with the counter bored round hole 2a-3 so as to electrically connect the connection terminal 1 to the conductive piece 2b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection terminal attached to a cable end and a terminal block for connecting the connection terminal.

When connecting a cable to a terminal block,
A connection terminal is attached to the cable end, and the connection terminal is screwed to the conductor piece with a tightening screw. However, when the number of connection terminals is large, the screwdriver is very troublesome and time-consuming, and therefore, there is a demand for a terminal block that allows easy and reliable attachment / detachment of connection terminals.

[0003]

2. Description of the Related Art Conventionally, as shown in the perspective view of FIG. 7, a terminal block 12 is composed of an insulating block 12a, a conductor piece 12b and a tightening screw 12c.

The insulating block 12a is a connection girder (three digits are shown in the figure) divided vertically and horizontally by girder partition walls 12a-1 on the upper insertion surface so as to relay the connection terminal 11 at the cable end.
The conductor piece 12b provided in each connection girder is provided with a screw hole (not shown) for connecting the connection terminal 11.

As the connection terminal 11, for example, a crimp terminal having a generally used round hole is used as shown in the drawing, and a tightening screw 12c having a plain washer 13 and a spring washer 14 inserted therein is used for the round hole of the connection terminal 11. It is inserted through 11a and screwed into the screw hole of conductor piece 12b.

The insulating block 12 shown in the figure can be divided into a single block for each connecting girder, and the insulating block 12 is combined with a necessary number of girders and sandwiched between the both end blocks, and is integrally connected in a beaded manner with a connecting screw 15.

[0007]

However, according to the above-mentioned connection terminal and the terminal block for connecting it, when the number of connection digits of the terminal block increases, the plain washer and the spring washer are attached to the tightening screw. In addition, it is very troublesome to insert it into the connection terminal, then insert it into the screw hole, and tighten the screw with a tool such as a screwdriver. In addition, the screw hole is behind the connection terminal (crimp terminal) and is difficult to see. Therefore, it becomes difficult to tighten the screw.

As a result, there are problems in that a great deal of man-hours are required for the cable connection work and that the tightening screw, the flat washer, the spring washer, etc. may be lost when the connection terminal is attached and detached.

In view of the above problems, it is an object of the present invention to provide a connection terminal and a terminal block for connecting the connection terminal, in which the connection terminal at the cable end can be easily and surely attached / detached in a short time.

[0010]

In order to achieve the above object, in the connection terminal and the terminal block connecting the same of the present invention, a one-character projection portion is formed by flattening the outer periphery of one end in axial symmetry. A connecting pin including a cylindrical cam portion that is connected to the one-character protrusion and has an inclined surface with respect to the axis, a shaft portion that is connected to the cylindrical cam portion, and a knob that prevents the compression coil spring inserted into the shaft portion from coming off; A terminal connecting portion having a shaft hole into which the shaft portion of the connecting pin is fitted and a cam hole having a bottom surface with an inclined surface that meshes with the inclined surface of the cylindrical cam portion at one end, and the terminal end portion is connected to connect the cable end. It is composed of a cable end connection part, and the connection terminal is inserted into the shaft hole from the side of the cam hole and the compression coil spring is held by the knob to hold the connection pin vertically so that the slopes always mesh with each other and make spring contact. Will do A connecting terminal and a notch groove for inserting the compression coil spring of the connecting terminal from the side end are provided at both ends of the conductor piece, and the conductor piece is inserted into the connecting girder separated by the girder partition wall from the inserting surface. A guide groove that forms a space and corresponds to the notch groove on the insertion surface and has the one-character protrusion portion inserted in one character direction from both ends, and the one-character protrusion portion can rotate at the inner end of the guide groove. It is composed of an insulating block having a counterbore round hole communicating with each other, and the terminal connecting portion of the connection terminal is inserted into the insertion space, and the knob is rotated at the counterbore round hole position so that the slopes are mutually separated. It is configured such that the terminal part for sliding contact is pressed against the conductor piece and at the same time the one-character projection is engaged with the counterbore round hole to electrically connect the connection terminal to the conductor piece.

[0011]

The connecting pin including the cylindrical cam portion having the one-character protrusion portion, the inclined surface, the shaft portion, the compression coil spring, and the knob is previously hung on the terminal connecting portion of the connecting terminal.
The compression coil spring repels the spring between the knob and the terminal connection part, and inserts the thickness of the conductor piece in the meshing state where the slope of the cylindrical cam part and the slope of the cam hole provided in the shaft hole of the terminal connection part match. The gap to be obtained can be always formed.

Further, the shaft portion of the connecting pin is inserted into the notch groove of the conductor piece, and the one-character projection is inserted into the guide groove of the inserting surface so that the terminal connecting portion is provided in the inserting space between the conductor piece and the inserting surface. By inserting and turning the knob about 90 ° to 120 ° at the counterbore round hole position in the back of the guide groove, the slanted surface of the meshed cylindrical cam part slips on the slanted surface of the cam hole and is displaced. Since the cylindrical cam part is pushed out from the cam hole, the cylindrical cam part can be tightened and press-contacted between the terminal connection part and the conductor piece, and at the same time, the one-letter-shaped protrusion part rotates to counterbore. The connection terminal can be electrically connected to the conductor piece by being engaged with the round hole and prevented from coming off.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The gist of the present invention will be described in detail below with reference to the embodiments shown in the drawings. As shown in the side view including the partial breakage of FIG. 1, the connection terminal 1 connected to the cable end is
It is composed of a cable end connecting portion 1a for connecting the cable end, a terminal connecting portion 1b for connecting to the conductor piece 2b of the terminal block 2, and a connecting pin 1c extending vertically from the terminal connecting portion 1b.

As shown in the left and right side views of FIGS. 2 (a) and 2 (b), the connecting pin 1c has a one-character projection 1c-1 formed by flattening the outer periphery of one end symmetrically about the axis. A cylindrical cam portion 1c-2 having a slanted surface 1c-2a with respect to the shaft center in a collar portion 1c-1a connected to the one-character protrusion 1c-1, and a shaft portion connected to the cylindrical cam portion 1c-2.
1c-3 and the shaft portion 1c-3 are screwed to prevent the compression coil spring 3, the flat washer 4 and the spring washer 5 which are inserted when the connection terminal 1 is assembled as shown in the side view of FIG. And a knob 6 (this knob 6 is fixed with an adhesive (not shown) after assembly).

As shown in the side views and plan views of FIGS. 3 (a) and 3 (b), the connection terminal 1 has a connection pin 1c shown in FIG.
The shaft hole 1b-1 into which the shaft part 1c-3 is inserted, and the slope 1b-2a that meshes with the slope 1c-2a of the cylindrical cam part 1c-2 of the connecting pin 1c at one end of the shaft hole 1b-1 are bottom surfaces. Equipped with a cam hole (counterbore hole) 1b-2. As shown in FIGS. 1 and 6 (a), the cylindrical cam portion 1c
-When the inclined surface 1c-2a of -2 and the inclined surface 1b-2a of the cam hole 1b-2 are aligned and meshed, the direction of the one-letter shape of the connecting pin 1c is the same as the inserting direction of the connecting terminal 1. Consider the meshing of slopes 1c-2a and 1b-2a.

The connecting pin 1c has a cam hole 1b-in the shaft hole 1b-1 of the terminal connecting portion 1b, as shown in the side view of FIG. 4 showing the assembly of the connecting terminal 1 and the connecting pin 1c including a partial breakage. Insert from the 2 side, slope 1c-2a of cylindrical cam 1c-2 and slope 1b of cam hole 1b-2
-2a receives the compression coil spring 3 by the knob 6 screwed to the male screw 1c-3a at the end of the shaft 1c-3 so that the springs are always in meshing contact with each other. The gap G between the lower surface of 4 and the upper surface of the terminal connection portion 1b (this gap corresponds to the compression height of the compression coil spring 3) is the cylindrical cam portion 1c-2.
Cam hole for slope 1c-2a and shaft hole 1b-1 of terminal connection 1b
In the meshed state where the sloped surface 1b-2a of 1b-2 matches, the conductor piece
2b (thickness T) can be just inserted, and the knob 6 can be rotated about 90 ° to 120 ° as described later to rotate the slope 1c.
-2a, 1b-2a slips out of contact with each other (cylindrical cam
1c-2 is pushed out from the cam hole 1b-2), and the terminal connecting portion 1b is dimensioned so that it can be tightened and pressure-contacted with the conductor piece 2b.

The terminal block 2 for connecting the connection terminal 1 is
As shown in the perspective view of FIG. 5, the insulating block 2a and the conductor piece
Composed of 2b and. The insulating block 2a has a structure in which a single block is connected in series by two connecting screws 7 as in the conventional case, and the connecting girders vertically divided by the girder partition wall 2a-1 on the upper insertion surface (9 digits are shown in the figure. (Shown), and each connection girder is provided with a conductor piece 2b.

The conductor piece 2b has a cutout groove 2b-1 through which the compression coil spring 3 inserted into the shaft portion 1c-3 of the connection pin 1c is inserted from its side end.
At both ends, that is, at the input side and the output side. (See also Figure 1)
This conductor piece 2b is inserted into a holding groove 2a-5 provided in a single block when the single blocks are connected in a string. As shown in FIG. 1, the inserted conductor piece 2b floats from the insertion surface 2a-4, and the distance D, that is, the insertion space of the connection terminal 1, is the thickness of the terminal connection portion 1b of the connection terminal 1 and the flange portion. 1c-1a
The thickness H and the total height H should be such that it can be inserted.

The terminal block 2 has a conductor piece 2b on the insertion surface.
The guide groove 2a-2 and the guide groove 2a-2 that are inserted from both ends are formed by aligning the one-character projection 1c-1 of the connecting pin 1c on the concentric line A corresponding to the notch groove 2b-1 of FIG. 1 (see FIG. 1). A counterbore round hole 2a-3, through which the one-character protrusion 1c-1 can rotate, is provided at the rear end of 2a-2. (See also Fig. 1.) When connecting the connection terminal 1 to the terminal block 2, first of the side view including the partial breakage of Figs. 6 (a) and 6 (b), first, as shown in Fig. 6 (a), the terminal connection portion While inserting 1b into the insertion space D between the conductor piece 2b and the insertion surface, the shaft portion 1c-3 (compression coil spring 3) of the connection pin 1c is inserted into the notch groove 2b-1 of the conductor piece 2b, and the one-character projection is formed. The portion 1c-1 is inserted into the guide groove 2a-2 on the insertion surface.

Then, as shown in (b), the connecting terminal 1 is pushed further forward, and the knob 6 (connecting pin 1c) is shown to the back of the guide groove 2a-2, that is, the counterbore round hole 2a-3 position. Do Not rotate the driver about 90 to 120 degrees. By rotating the connecting pin 1c, the slanted surface 1c-2a of the cylindrical cam portion 1c-2 slides the slanted surfaces 1b-2a of the engaged cam holes 1b-2 to each other and shifts the position to move the cylindrical cam portion 1c-2. I try to push it out of the cam hole 1b-2. Along with that, the cylindrical cam portion 1c-2 tightens the terminal connecting portion 1b to the conductor piece 2b and press-contacts them to electrically connect the connection terminal 1 and the conductor piece 2b. At the same time, the one-character protrusion 1c-1 at the tip
Is removed from the guide groove 2a-2 and 90 ° ~ 120 in the spot facing round hole 2a-3.
By turning about one degree, the direction of one character becomes oblique to the direction of the guide groove, so that it is caught in the guide groove 2a-2, and the inserted connection terminal 1 is prevented from coming off from the terminal block 2.

On the contrary, the connection terminal 1 connected to the terminal block 2 can be removed in the same manner in a short time by the reverse operation. In this way, connecting / disconnecting the connection terminal at the cable end can be done simply by inserting it into the insertion space of the terminal block and rotating the knob. Even if the number of connection terminals increases, the connection work can be performed simply and reliably in a short time. It is possible,
The connection pin that tightens the connection terminal is not a removable tightening screw like the conventional one, but is always fitted to the connection terminal together with the compression coil spring and the spring washer.Therefore, they are never lost when attaching or detaching the connection terminal. Disappear.

[0022]

As described above in detail, according to the present invention,
The connection terminal at the cable end can be connected easily and securely in a short time, and the connection pins, flat washers, spring washers, etc. are not lost. Exerts a useful effect.

[Brief description of drawings]

FIG. 1 is a side view including a partial cutaway of an embodiment according to the present invention.

FIG. 2 is a left and right side view of the connection pin of FIG.

FIG. 3 is a side view and a plan view of the connection terminal of FIG.

FIG. 4 is a side view including partial breakage showing the assembly of the connection terminal and the connection pin in FIG.

5 is an exploded perspective view of FIG.

FIG. 6 is a side view including a partially cutaway view showing a state in which the connection terminals of FIG. 1 are connected.

FIG. 7 is a perspective view of the related art.

[Explanation of symbols]

1 is a connection terminal 2 is a terminal block 1a is a cable end connection part 2a is an insulating block 1b is a terminal connection part 2a-1 is a girder partition wall 1b-1 is a shaft hole 2a-2 is a guide groove 1b-2 is a cam hole ( 2a-3 is a counterbore round hole 1b-2a is an inclined surface 2a-4 is an insertion surface 1c is a connecting pin 2b is a conductor piece 1c-1 is a letter-shaped protrusion 2b-1 is a notched groove 1c-2 Cylindrical cam 3 is compression coil spring 1c-2a is slope 6 is knob 1c-3 is shaft

Claims (1)

[Claims] 1. A one-character projection (1c-1) formed by flattening the outer circumference of one end symmetrically about an axis, and a slope (1c-2a) connected to the one-character projection (1c-1) with respect to the axis. Cylindrical cam part (1c-2)
And a shaft part (1c-3) connected to the cylindrical cam part (1c-2) and the shaft part (1c-3)
c-3) A connecting pin (1c) consisting of a knob (6) for retaining the compression coil spring (3) and a shaft part of the connecting pin (1c)
The shaft hole (1b-1) into which (1c-3) is fitted and the slope (1b- that engages with the slope (1c-2a) of the cylindrical cam portion (1c-2) at one end of the shaft hole (1b-1).
Terminal connection (1b) with cam hole (1b-2) on the bottom of 2a)
And a cable end connecting part (1a) connected to the terminal connecting part (1b) to connect a cable end, and the terminal connecting part (1
b) Insert the connecting pin (1c) into the shaft hole (1b-1) from the side of the cam hole (1b-2) and hold the compression coil spring (3) so that the slopes are always in mesh and in spring contact. ) With the connection pin (1
(c) is held vertically, and a conductor piece (2b-1) having a notch groove (2b-1) at both ends through which the compression coil spring (3) of the connection terminal (1) is inserted from the side end (1). 2b) and the conductor piece (2b) are provided in the connection girder separated by the girder partition wall (2a-1) away from the insertion surface (2a-4) to form an insertion space and the insertion surface (2a -4) corresponding to the notch groove (2b-1) and the guide groove (2a-2) and the guide groove (2a- A counterbore round hole (2a-3) in which the one-character protrusion (1c-1) can rotate at the rear end of 2)
A terminal block (2) consisting of an insulating block (2a) and a terminal block (1b) of the connection terminal (1) into the insertion space and a knob (6) with a round hole By rotating at the position of (2a-3), the slopes are slidably engaged with each other, the terminal connecting portion (1b) is pressed against the conductor piece (2b), and at the same time, the one-character protrusion (1
A connection terminal and a terminal block for connecting the connection terminal (1) to the conductor piece (2b) by engaging the c-1) with the counterbore round hole (2a-3).