JP2001110473A - Multiple connection system screw-type terminal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multiple connection system screw-type terminal device which is satisfactory in operability in assembly work for decreasing a cost and does not need a large space for installation, owing to its compact size. SOLUTION: Each rotary tongue 25 is projected from a top of a cylindrical housing part 21 so as not to move along an axial direction of the housing part 21, where the cylindrical housing part is provided in one body with a body plate 20. A terminal plate 41 is fixed at the bottom of the housing part 21. A conductor-gripping material 50 is stored in the housing part 21, so as not to rotate but to move in parallel with a direction opposite to the direction of the terminal plate 41. A screw shaft 32, which is provided to the rotary tongue 25, is screwed and engaged with the conductor-gripping material 50. By the rotation of the screw shaft 32 accompanied by the rotation of the rotary tongue 25, the conductor-gripping material 50 is made to advance and retreat in the direction opposite to the direction of the terminal plate 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multiple screw type terminal device used for connecting a conductor such as a speaker in an audio set.

[0002]

2. Description of the Related Art Conventionally, as a multiple screw type terminal device, those having a structure shown in FIGS. 7 to 9 are often used. In this conventional device, a plate-shaped main body plate 1
A plurality of conductor connection portions 3, 3... Having a short cylindrical shape and having a conductor insertion recess 2 on the peripheral wall are integrally provided, and a terminal plate 4 is fixed to the bottom of each conductor connection portion 3. A rotary knob 6 fixed around the rod-shaped contact 5 is inserted into the outside thereof, and a screw shaft 7 integrally formed with the rod-shaped contact 5 is screwed into a screw hole 8 provided at the center of the terminal plate 4. .

The rod-shaped contact 5 is integrally formed with a lead wire holding member 9 in the form of a flange on the base end side, and a screw shaft 7 is integrally provided at the center of the rod-shaped contact 5. After the screw shaft portion 7 is passed through the screw hole 8 of the terminal plate 4,
The terminal plate 4 is prevented from coming off by crushing and deforming the tip.

The rod-shaped contact 5 has a plug insertion hole 10 at the top, and is integrated with the rotary knob 6 by a curl caulking 11 for forming the opening edge into a flange shape. A banana chip type plug 12 shown in FIG. 9 is inserted into the plug insertion hole 10.

The terminal plate 4 is formed by bending bent fixing pieces 13, 13... Around the periphery of the terminal plate 4 at an angle of 90 degrees on the rear surface side, and press-fitting the bent pieces into the fixing holes of the main body plate 1. Fixed against. Further, a terminal piece 14 is formed integrally with the terminal plate 4, and the terminal piece 14 is formed into an arc shape, so that the terminal piece 14 is inserted from the front side of the main body plate 1 and protrudes to the rear side, and the terminal terminal at the tip end is formed. The portion 14a can protrude sideways.

[0006]

In the conventional apparatus as described above, when the terminal plate is attached to the main body plate, the terminal plate is assembled from the front side of the main body plate, and a terminal piece integrated with the terminal plate is made to penetrate the rear side and protrude. Therefore, especially when the terminal piece is projected laterally, it is necessary to insert the terminal piece in an arc shape, and the workability is poor, and when the length of the lateral projection is long, the arc-shaped curvature is correspondingly increased. There is a problem that the radius becomes large and the terminal piece must be protruded largely on the back surface of the main body plate, and the shape becomes large.

Further, since the terminal plate is fixed to the main body plate by press-fitting the bent piece into the insertion hole, there is a problem that a pressurizing step for that is required.

In addition, since the rod-shaped contact integral with the rotary knob is prevented from being pulled out by crushing the screw shaft portion, a book-shape in which a large number of screw shaft portions protrude from the back surface of the main body plate, such as a multiple type. The apparatus has a problem that the crushing operation is extremely troublesome and the workability is poor.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned various problems in the prior art, and has as its object to provide a multiple screw type terminal device which is small in size and does not require an installation space, while improving the workability of assembly and reducing costs. It was done as.

[0010]

SUMMARY OF THE INVENTION The features of the present invention for solving the conventional problems as described above and achieving the intended purpose are as follows.
A plurality of rotary knobs are rotatably projected on the surface of the main body plate, each of the rotary knobs is integrally provided with a screw shaft portion coaxially arranged with the axis thereof, and the main body plate corresponds to each of the rotary knobs, respectively. By fixing the terminal plate and rotating the screw knob by rotating the rotary knob, the wire holding member facing the terminal plate is operated, and the wire is held between the wire holding member and the terminal plate. In the multiple screw type terminal device, each of the rotary knobs is projected from a top of a cylindrical housing portion provided integrally with the main body plate, and the rotary knob is pivoted with respect to the housing portion. The terminal plate is fixed to the bottom of the housing part, and the lead wire holding member is attached to the housing. A non-rotatable and non-rotatably accommodated part is accommodated so as to be able to move in parallel in a direction facing the terminal plate, and a screw shaft provided on the rotary knob is screwed to the conductive wire holding member material, and the screw shaft is rotated by the rotary knob The lead wire holding member is moved back and forth in the direction facing the terminal plate by the rotation of.

The top portion of the housing portion projects from the front surface of the main body plate, and the bottom side of the housing portion is opened to the back side of the main body plate, and inserted into the bottom portion of the housing portion from the back side of the main body plate. The terminal plate has a plurality of retaining spring pieces integrally around the terminal plate, and is pushed into the housing section from the rear side of the main body plate, whereby the retaining spring pieces are attached to the inner surface of the housing section. The rotary knob has a projection integrally formed on the outer periphery of a base end thereof, and the projection has a top opening edge of a housing portion. The rotary knob has a bottom surface which is fixed to the inside of the terminal plate portion inserted from the back side of the main body plate so as to integrally protrude therefrom. It includes an abutment protrusion, it is preferable to be restricted to the pushing direction of the operation of the rotary knob by projecting portions.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS.
Referring to FIG.

In the figure, reference numeral 20 denotes a main body plate molded by a synthetic resin. Eight housing portions 21, 21,... Are integrally formed on the main body plate 20 in two rows. Each of the housing portions 21 is formed in a cylindrical shape, and a top portion is a protruding cylindrical portion 21 a protruding toward the front surface of the main body plate 20, and a bottom portion is open to the back surface of the main body plate 20. A lead wire insertion opening 22 into which the lead wire a can be inserted is opened on the side surface of the protruding cylinder 21a.

A knob insertion opening 23 is formed at the center of the top of the protruding cylindrical portion 21a, and a peripheral portion of the knob insertion opening 23 has a stopper which protrudes from the top of the protruding cylindrical portion 21a in a flange shape toward the center. It is a part 24.

The base end of the rotary knob 25 is inserted into the projecting cylindrical portion 21a of the housing portion 21. The rotary knob 25 is formed by molding a synthetic resin material into a cylindrical shape. A non-slip groove 26 is integrally formed on the outer peripheral surface of the cylindrical knob 25a on the distal end side, and a flange is formed on the outer periphery of the base end. The retaining protrusions 27 having a shape of are formed integrally.

The rotary knob 25 is formed in such a size that the cylindrical knob 25a is rotatably inserted into the knob insertion opening 23 at the top of the housing, and has a retaining protrusion 27 at the base end.
Is formed to be larger than the knob insertion opening 23.

The rotary knob 25 is inserted into the housing section 21 from the bottom opening side of the main body plate 20, and the cylindrical knob section 25a on the tip side is inserted into the insertion slot 23 to project outside the top of the housing section. The stopper projection 27 is in contact with the knob stopper 24 on the periphery of the knob insertion opening 23 and is prevented from falling off.

A rod-shaped contact 30 is integrated with the rotary knob 25 at its center. The rod-shaped contact 30 is formed of a conductive metal material, and the lower half thereof becomes a screw shaft portion 32 having an external thread engraved on the outer periphery.
The upper half serves as a pick-through shaft portion 33. A bottomed plug insertion hole 34 is opened at the top.

The pick-through shaft portion 3 of the rod-shaped contact 30
3 are press-fitted into a contact insertion hole previously opened through the center of the rotary knob 25 to be integrated with each other. In addition, this integration may be performed by flange and curl caulking as in the conventional example described above.

In the housing part 21, the main body plate 2 is provided.
The terminal 40 is inserted from the opening on the bottom side of the terminal 0. The terminal 40 is formed by punching and bending a conductive metal plate material, and is formed of a terminal plate 41 having a flat plate shape, and a terminal portion 42 and a terminal plate 41 rising from the peripheral edge of the terminal plate 41 to the back surface at right angles. The terminal 40 is composed of guide pieces 43, 43,... Which rise upward at right angles from four places around the terminal plate. .. Are inserted into the protruding cylindrical portion 21a, and the ends thereof are brought into contact with the bottom surface of the rotary knob 25, thereby restricting the operation of the rotary knob 25 in the pushing direction, and rotating the rotary knob 25 so that it cannot move in the axial direction. A rotating knob is attached so that it can be done.

A spring piece 44 for retaining is cut and raised on the outer surface of each guide piece 43, and each spring piece 44 projects from the inner surface of the lower end opening of the protruding cylinder 21a. 45
The terminal plate 41 is fixed in the housing part 21 by this.

A bearing hole 46 is opened in the center of the terminal plate 41, and the tip of the screw shaft portion 32 is rotatably supported in the bearing hole 46.

A wire holding member 50 is screwed to the screw shaft portion 32. The wire holding member 50 is formed of a conductive metal material into a rectangular box shape, and has a box-shaped bottom plate portion 51.
A female screw hole 52 is formed at the center of the screw shaft portion 32.
Is screwed.

The box-shaped four peripheral walls 53 are in sliding contact with the above-described guide pieces 43 on the front surface of the terminal plate 41, thereby restricting the operation of the wire holding member in the rotational direction. When the screw shaft 32 is rotated, the screw shaft 32 is translated in the axial direction of the screw shaft 32.

At the time of assembling the screw-type terminal device thus constructed, the rotary knob 25 and the rod-shaped contact 30 are integrated, and the screw shaft portion 32 has
In a state in which 0 is screwed, the main body plate 20 is inserted into the housing portion 21 from the back surface side, and then the guide piece 43 of the terminal plate 41 is pushed into the protruding cylindrical portion 21a. At this time, the retaining spring piece 44 is elastically pushed in and inserted, and protrudes by its own elasticity at the position of the system stopping step 45 and is connected to the system stopping step 45. As a result, the terminal plate 41 is fixed at a predetermined position, and at the same time, the rotary knob 25 and the wire holding member 50 are assembled at the predetermined position.
Assembly is completed.

When using this screw type terminal device, as shown in FIG. 3, the rotary knob 25 is rotated to raise the lead holding member 50, and the upper surface of the terminal plate 41 formed by this is connected to the lead holding member 31. The conductor a to be connected is inserted into the gap between the conductor a and the rotating knob 25 is rotated in the direction in which the conductor holding member 50 descends, and the conductor a is inserted between the conductor holding member 50 and the terminal plate 41.
, The connection of the conductive wire a is completed.

The plug is connected by inserting a plug 61 (commonly called a banana chip) having a plurality of contact springs 60 elastically projecting therearound into the plug insertion hole 34 of the rod-shaped contact 30.

[0028]

As described above, in the multiple screw type terminal device according to the present invention, the rotary knobs are respectively protruded from the tops of the cylindrical housing portions provided integrally with the main body plate, and the rotary knobs are moved. Affixed to the housing part so as to be immovable in the axial direction, the terminal plate is fixed to the bottom of the housing part, and the lead wire holding member is non-rotatable in the housing part and is moved in parallel in a direction facing the terminal plate. The wire pinching member is screwed with a screw shaft portion provided for the rotary knob, and the wire pinching member is advanced and retracted in a direction facing the terminal plate by rotation of the screw shaft portion by the rotating operation of the rotary knob. By making them the same, the crimping process for preventing the screw shaft portion integrated with the rotary knob from coming off becomes unnecessary, and the assembling work is simplified.

Further, the top of the housing is projected from the front side of the main body plate, and the bottom of the housing is opened to the back side of the main body plate, and inserted into the bottom of the housing from the back side of the main body plate. By fixing the terminal plate, the installation of each member to the main body plate is completed only by the insertion work from the back side of the main body plate, especially when it is desired to extend the terminal part integrated with the terminal plate horizontally long. Even in this case, it is not necessary to increase the dimension in the height direction unlike the conventional curved terminal portion, and a compact shape can be obtained.

Further, a plurality of retaining spring pieces are integrally provided around the terminal plate and pushed into the housing from the rear side of the main body plate, whereby the retaining spring piece provided on the inner surface of the housing is provided. By being connected to the stepped portion, each member is incorporated by lightly pushing from the rear surface side of the main body plate, so that the assembling work is facilitated.

Also, a projection for retaining is integrally provided on the outer periphery of the base end of the rotary knob, and the projection is brought into contact with the inside of the top opening edge of the housing portion so as to be immovable in the projecting direction. A knob contact projection is provided, which is integrally provided with a bottom surface of the rotary knob on an upper surface side of the terminal plate inserted from the back side of the main body plate, and regulates the operation of the rotary knob in the pushing direction by the projection. Thus, the rotary knob is positioned at the same time as the terminal plate is fixed, and the assembly of the device is further simplified.

[Brief description of the drawings]

FIG. 1 is a plan view of a first embodiment of a multiple screw type terminal device according to the present invention.

FIG. 2 is a partial bottom view of the same.

3 is a cross-sectional view taken along the line AA in FIG. 1, showing a state where a conductor is held between the right half and a state before connecting the conductor to the left half.

FIG. 4 is a plan view of one terminal used in the first embodiment.

FIG. 5 is a side view of the same.

FIG. 6 is a sectional view showing an assembling process of the first embodiment.

FIG. 7 is a plan view showing a conventional multiple screw type terminal device.

FIG. 8 is a side view of the same.

FIG. 9 is a longitudinal sectional view of the same.

DESCRIPTION OF SYMBOLS 20 Body plate 21 Housing part 21a Projecting cylinder part 22 Conductive wire insertion port 23 Pick insertion port 24 Pick retaining part 25 Rotation knob 25a Cylindrical knob 26 Slip groove 27 Stopper protrusion 30 Bar-shaped contact 31 Flange 32 Screw shaft portion 33 Pick-through shaft portion 34 Contact insertion hole 40 Terminal 41 Terminal plate 42 Terminal portion 43 Guide piece 44 Spring piece for retaining 45 System stop step 46 Bearing hole 50 Conductor holding member 51 Bottom plate 52 Female screw hole 53 Peripheral wall 60 Contact spring 61 Plug

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[Procedure amendment]

[Submission date] October 12, 1999 (1999.10.
12)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 7

[Correction method] Change

[Correction contents]

FIG. 7

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masamitsu Ogawa 6-5-5 Togoshi, Shinagawa-ku, Tokyo SMC Corporation F-term (reference) 5E012 BA06 5E086 CC13 DD05 DD35 DD45 DD48 DD49 LL13 LL17

Claims (4)

[Claims] A plurality of rotary knobs are rotatably protruded from the surface of the main body plate, and each of the rotary knobs is integrally provided with a screw shaft portion coaxially disposed with the axis thereof. Each of the terminal plates is fixed in correspondence with the above, and the wire pinching member material facing the terminal plate is operated by rotating the rotary knob to rotate the screw shaft portion, so that the wire pinching member and the terminal plate are fixed. In the multiple screw type terminal device in which a conducting wire is sandwiched between the housing and the main body plate, each of the rotary knobs is protruded from a top of a cylindrical housing portion provided integrally with the main body plate, and the rotary knob is connected to the housing. The terminal plate is fixed to the bottom of the housing part so as to be immovable in the axial direction with respect to the part, and the lead wire holding member material is A screw which is accommodated in the housing so as to be non-rotatable and parallel to the direction opposite to the terminal plate, and a screw shaft provided for the rotary knob is screwed to the conductive wire holding member material, and a screw is formed by rotating the rotary knob. A multiple screw type terminal device, wherein the conductor holding member is moved forward and backward in a direction facing the terminal plate by rotation of a shaft portion. 2. A top portion of a housing portion is projected from a front surface side of a main body plate, and a bottom side of the housing portion is opened to a back side of the main body plate, and is inserted into a bottom portion of the housing portion from a back side of the main body plate. 2. The multiple screw type terminal device according to claim 1, wherein the terminal plate is fixed. 3. A system in which the terminal plate has a plurality of retaining spring pieces integrally around the terminal plate, and the retaining spring pieces are provided on the inner surface of the housing section by being pushed into the housing section from the rear side of the main body plate. 3. The multiple screw type terminal device according to claim 2, wherein the terminal device is connected to the stop portion. 4. The rotary knob has an integral projection on the outer periphery of a base end thereof, which comes into contact with the inside of the edge of the top opening of the housing so that it cannot be moved in the projection direction. Stop it,
The rotary knob is provided with a knob abutting protrusion integrally projecting from the back side of the main body plate to the upper surface side of the terminal plate portion inserted from the back side of the main body plate, and the protrusion controls the operation of the rotary knob in the pushing direction. The multiple screw type terminal device according to claim 2 or 3.