JPH03182070A - Connector - Google Patents

Abstract

PURPOSE:To shorten the distance between two terminal members to be connected, increase the contacting points and reduce the operating force, by allowing no component parts to exist between the terminal members, and pinching them by a contacting piece in a specified structure. CONSTITUTION:Terminal members 50, 60 are pinched by contacting pieces 20, 20 and connected electrically. The contacting pieces 20, 20 are borne by shaft with the aid of a bolt 4, which penetrates a through hole 51 bored at one end of the terminal member 50, and thereto a certain compression force is applied through a compressive spring 3 and a tube 14. A U-groove 20c at the tip of each contacting piece 20, 20 is detained with a guide pin 8, and they are in contact with the terminal member 50 at points A, B while with the other one 60 at point C. There are no parts interposed between these terminal members 50, 60, which are thus capable of approaching. The gap between the contacting pieces at the point C is dependent upon the protruding amount of a protrusion 20d provided on the contacting piece so as to be convenient for operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a connector for connecting, for example, a main circuit terminal of a draw-out type circuit breaker and a terminal of a switchboard.

[Prior Art] A conventional connector will be explained with reference to FIGS. 4 and 5. FIG. 4 is a diagram showing a state in which each terminal is connected, and FIG. 5 is a diagram showing an initial state in which each terminal is not connected.

In FIG. 4, rod-shaped (or plate-shaped) terminal members 5 and 6 each have a rectangular cross section in a direction perpendicular to the plane of the paper. Plate-shaped contact pieces 2.2 are provided on both side surfaces of one terminal member 5. The thickness of the plate-shaped contact piece 2 is thinner than the width of the terminal members 5 and 6 in the direction perpendicular to the paper surface. Therefore, generally, a plurality of contact pieces 2 are arranged in parallel in a direction perpendicular to the plane of the drawing and are connected to each other by guide rods 2a, 2a so that they operate as a unit. A tension spring 3 is provided between each contact piece 2.2 facing each other with the terminal member 5 in between so as to generate a predetermined contact pressure against the terminal member 6. Each contact piece 2.2 merely clamps the terminal element 5, for example at the contact point 2a, by the biasing force of the tension spring 3. Therefore, clusters 15 are provided to eliminate backlash in the direction perpendicular to the plane of the paper and to prevent the terminal members 5 from falling off in the longitudinal direction.

[Problems to be Solved by the Invention] In the conventional connector, as shown in FIG. 4, the tension spring 3 and the cluster 15 are provided between the terminal members 5 and 6. There was a problem in that the distance l between the terminal members 5 and 6 had to be long to avoid contact with the terminal members 5 and 6.

Also, if you look at one contact piece 2, 5. Each terminal member 5
and No. 6 have a problem in that they are in contact only at two points, points 5a and 6a, and lack reliability as a contact portion.

Additionally, when the connector is not in use,
For example, as shown in FIG. 5, each contact piece 2.2 comes into contact near its tip 2C due to the biasing force of the tension spring 3, and only makes contact with the terminal member 5 at a point 2b. Therefore, each contact piece 2.2 is held unstable relative to the terminal member 5, and it is difficult to push the terminal member 6 between the contact pieces 2.2 against the biasing force of the tension spring 3. had the problem of requiring a large amount of operating force.

This invention was made to solve the above problems, and aims to provide a connector in which the distance between each terminal member is shortened, the number of contact points is increased, and the operating force is lightened. .

[Means for Solving the Problems] A connector according to the present invention includes: a rod-shaped or plate-shaped terminal member that is a plate-shaped body having a rectangular cross section and has a through hole near the - end face of the plate-shaped surface; A guide pin provided through the terminal member parallel to the end surface of the terminal member at a position farther from the end surface of the through hole than the through hole engages with the through hole, and a thick annular spacer member, the spacer member having an engaging portion that engages with the guide pin, a hole portion that faces the through hole, and a convex contact portion that makes contact with another terminal member; two contact pieces provided on both sides of the terminal member such that the guide pin and the engaging portion engage with each other and the convex contact portions oppose each other; and holes in the two contact pieces. a guide member that is provided through the annular spacer member and one of the two contact pieces, and applies a clamping force to the convex contact portion of the two contact pieces. It is equipped with a compression spring.

[Operation] The guide member is, for example, a bolt, nut, washer, etc., and the two contact pieces and the terminal member are integrally connected by the biasing force of the compression spring. Since the guide member passes through the hole provided in each contact piece and the hole in the annular spacer member provided in the terminal member, there is nothing between the negative end face of the terminal member and the end face of the other terminal member. There is no such thing, and the distance between both terminals may be the minimum necessary safe distance.

Since the annular spacer member is thicker than the terminal member, the two contact pieces and the terminal member do not come into close contact with each other at the same time even in the initial state when the connector is not in use (a state in which no other terminal member is inserted). Here, if the protrusion amount of the convex contact portion of each contact piece is set to less than half the thickness of the spacer member, the convex contact portions will not come into contact and the distance between them will be maintained at a predetermined interval.

The two contact pieces and the terminal member are stably maintained in a fixed positional relationship with each other by the engagement of the engaging portion of the contact piece, such as a U-shaped groove or oval hole, with a guide pin that passes through the terminal member. It will be done. In addition, when the connector is in use, the negative terminal member and one contact piece are in contact with each other at two places near the engaging portion, for example, on both sides of the U-shaped groove, and the other terminal member and the contact piece are in contact with each other in the convex shape. Since contact is made through the contact portion, the number of contact points increases compared to the conventional example.

[Example] A connector according to the present invention will be described with reference to FIGS. 1, 2, and 3 showing an example thereof.

In the figure, a terminal member 50 is, for example, a terminal of a drawer-type breaker or the like. Further, the terminal member 60 is a terminal provided on a fixed frame such as a switchboard. All of them are rod-shaped or plate-shaped terminal members having a rectangular cross section in a direction perpendicular to the plane of the paper. The thickness of the terminal member 50 is t! , the thickness of the terminal member 60 is assumed to be t2 (J=t2). The terminal member 50 has a negative end surface SOa.
It has a through hole 51 near it.

The through hole 51 has a thickness L of the terminal member 50! An annular spacer 7 having a predetermined thickness [3 (shown in FIG. 3)] is fitted therein. Further, a guide pin 8 is provided on the side surface 5 of the terminal member 50 at a position farther from the through hole 51 with respect to the end surface 50a.
It is provided so as to penetrate from 0b toward 50c. The side surfaces 50b and 50c of the terminal member 50 each have a convex contact portion 20a provided with a contact piece zO at one end thereof.
are arranged to face each other. The other end of the contact piece 20 has a U for engaging with the guide pin 8 as shown in FIG.
A U-shaped groove 20c is provided, and this U-shaped groove 20c
Both side portions of are formed in a convex shape to improve the contact condition. Therefore, the contact piece 20 is different from the terminal member 60 at point A.
is in contact with the terminal member 50 near the back surface thereof, and the terminal member 50 is at point B.
and C come into contact near the back surface. Furthermore, contact piece 2
A hole 20b is provided near the center of the terminal member 0 so as to face the five through holes of the terminal member 50. Further, in the vicinity of the hole 20b, a protrusion 20d is formed by punching or the like in order to vertically receive the urging force of the compression spring 3. A bolt 4 is provided to pass through the hole 20b of each contact piece 20 and the spacer member 7. A plate-shaped washer 9 is provided on the head of the bolt 4, and a tube 14 is fitted into the bolt 4. The washer 9 is a negative contact piece 20 (for example, lower in the figure)
abuts against the protrusion 20d.

On the other hand, on the side of the other contact piece 20 (for example, the upper part in the figure), the bolt 4 has two plate-shaped washers 10 and 11, and a compression spring 3 provided between each washer 10 and 11, respectively. It is installed through. Further, a nut 12 is screwed into the threaded portion of the bolt 4, and compresses the compression spring 3 via the washer 11. The compression spring 3 applies a predetermined pressure to the protrusion 20d of the contact piece 20 via the pressure spring 10. Note that a locking nut 13 is screwed onto the threaded portion of the bolt 4 above the nut 12. The tube fitted into the bolt 4 in front has a predetermined length and regulates the tightening position of the nut 12. As a result, the initial compression amount of the compression spring 3 is kept constant, and the contact pressure applied to the contact piece 20 is also kept constant. FIG. 3 shows the initial state.

At this time, each contact piece 20 is in contact with the re-spacer member 7 due to the biasing force of the compression spring 3. In order to set the distance between the convex contact portions 2Od of each contact piece 20 to a predetermined dimension L3 smaller than the thickness 12 (shown in FIG. 1) of the terminal member 60, the protrusion fit4 of each convex contact portion 20d is , (4= d (t ko L3)).

[Effects of the Invention] In the connector according to the present invention configured as described above, the compression spring 3 for applying contact pressure to the contact piece 20 is provided.
A bolt 4, a nut 12 and a washer 10 which are guide members passing through the terminal member 50 and each contact piece 2°.
．． Since it is held by II, the negative terminal member 50
There are no components between the terminal member 50 and the other terminal member 60, and as shown in FIG. Dimensions can be reduced.

Furthermore, as shown in FIG. 2, the contact piece 20 and the terminal member 60 contact near the back surface of point A, and the contact piece 20 and the terminal member 50 contact near the back surface of points B and C. Compared to the example, the number of contact points increases and reliability is improved.

Furthermore, as shown in FIG. 3, in the initial state when the connector is not in use, each contact piece 2 is
Since the interval between the two convex contact portions 20d is kept constant (L3), the initial state is stable, and the operating force required to push the terminal member 60 between the contact pieces 20 is reduced.

[Brief explanation of drawings]

FIG. 1 is a side view showing the state in which the connector according to the invention is used. FIG. 2 is a plan view of the same. FIG. 3 is a side view showing the connector shown in FIG. 1 in an unused initial state. FIG. 4 is a side view showing a conventional connector in use. FIG. 5 is a diagram showing a conventional connector in an unused initial state. In the figure, 3 is a compression spring, 4 is a bolt, 7 is a spacer member,
8 is a guide bin, 9, 10. II is Washya, 12.1
3 is a nut, 20 is a contact piece, 20d is a convex contact part, 20
b is a hole, 20c is a guide groove, 20d is a protrusion, 50.6
0 is a terminal member, and 51 is a through hole.

Claims (1)

[Claims] (1) A rod-shaped or plate-shaped terminal member that is a plate-shaped body with a rectangular cross section and has a through hole near one end surface of the plate-shaped surface, at a position farther than the through hole with respect to the one end surface, a guide pin provided to penetrate the terminal member parallel to the one end surface; an annular spacer member that engages with the through hole and is thicker than the terminal member; and an engagement member that engages with the guide pin. a hole portion facing the through hole and a convex contact portion for contacting another terminal member, the guide pin provided on the terminal member engages with the engaging portion, and two contact pieces provided on both sides of the terminal member so that the convex contact portions face each other; a guide provided through the hole of the two contact pieces and the annular spacer member; A connector comprising: a compression spring that is provided between the guide member and either one of the two contact pieces and applies a clamping force to the convex contact portion of the two contact pieces.