JPH0324724B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a contact gun that has two or more current-carrying terminals and is used when switching the current-carrying path.

(Structure of conventional example and its problems) Conventionally, this type of contact gun has a current-carrying terminal 1 at one end and an electric contact 2 facing the other, as shown in FIG.
a, a conductor 2 with a flexible conductor 3 connected to the other end is swingably supported by a seesaw stand 4, and a clevis-type air cylinder 5 has a cylinder side swingably supported at the other end of the conductor 2. It is constructed by rotatably connecting rods 5a, and when the rod 5a of the air cylinder 5 comes out, the conductor 2 rotates around the seesaw fulcrum 6, and the conductor contact 2a comes into contact with the energizing terminal 1, making it possible to conduct electricity. Conversely, the rod 5a of the air cylinder 5
When it is retracted, the conductor contact 2a separates from the current-carrying terminal 1 and becomes unable to conduct current.

However, in this conventional example, it is necessary to provide at least three free rotation nodes: the aforementioned seesaw fulcrum 6, the attachment part 7 of the air cylinder 5, and the connection part 8 between the rod 5a and the conductor 2, making the device complicated. Moreover, the contact surface between the conductor contact and the current-carrying terminal must also be made small, which has the disadvantage that an unnecessarily large load is applied to the current-carrying terminal.

(Object of the Invention) An object of the present invention is to provide a simple, compact, and high-performance contact gun that eliminates the above-mentioned conventional drawbacks.

(Structure of the Invention) In order to achieve the above object, the contact gun of the present invention includes a plate spring having one end fixed, a contact cylinder whose head side is attached to the other end of the plate spring, and a rod side of the cylinder. A C-type metal fitting attached to the C-type metal fitting, a conductor having one end supported by the inner bottom surface of the C-type metal fitting and a flexible conductor connected to the other end, and the cylinder are fixed relatively to each other, and the end thereof is attached to the rod of the cylinder. and a current-carrying terminal located between the cylinder and the conductor, and when the rod of the cylinder is extended and the tip of the rod presses against the upper surface of the current-carrying terminal, the rod acts together with the cylinder against the elastic force of the leaf spring. The conductor moves upward so that the upper surface of the conductor and the lower surface of the current-carrying terminal come into contact with each other, and by retracting the rod, the restoring force of the leaf spring brings the upper surface of the conductor and the lower surface of the current-carrying terminal into contact with each other. It is characterized by being made to separate.

(Description of Embodiment) An embodiment of the present invention will be described below with reference to FIG. 2. FIG. 2 shows a side view a and a front view b of a floating contact gun according to the invention,
In the figure, 11 is a cylinder having a piston rod 11a, 12 is a leaf spring that is fixed at one end and has the cylinder 11 attached to the other end to float the cylinder, 13 is a C-shaped fitting attached to the rod side of the cylinder 11, and 14 is a C-shaped fitting. A conductor 17 has one end supported on the inner bottom surface of the mold fitting 13 via an insulating plate 15 and a flexible conductor 16 connected to the other end, and the end thereof is located between the piston rod 11a and the conductor 14. It is a fixed current-carrying terminal.

Next, the operation of the above embodiment will be explained.

The piston rod 11a is connected to the upper surface 1 of the current-carrying terminal 17.
When 7a is pressed, the air cylinder 11 with the floating C-shaped fitting 13 is lifted by the leaf spring 12 since the current-carrying terminal 17 is fixed, and the air cylinder 11 with the C-shaped fitting 13 is lifted up. The conductor 14 supported by the conductor 11 is also lifted, and the lower surface 17b of the current-carrying terminal comes into contact with the conductor 14, allowing current to flow. When the piston rod 11a is away from the top surface 17a of the current-carrying terminal, the current-carrying terminal 1
Since the terminal 7 does not touch anything, it is possible to switch it to another current-carrying terminal, thereby switching the current-carrying path.

(Effects of the Invention) According to the present invention, the following effects can be obtained.

1. Since a leaf spring is used, there is no need for rotatable nodes that complicate the device, and it can be made compact without taking up space unlike a coil spring. 2. The contact surface between the current-carrying terminal 17b and the conductor 14 is large. can get.

3. Since the energizing terminal 17 is sandwiched between the piston rod 11a and the conductor 14, no uneven load is applied to it.

[Brief explanation of drawings]

Figure 1 is a side view of a conventional contact gun.
Figures 2a and 2b are side views showing a floating contact gun in an embodiment of the present invention, respectively;
It is a front view. 11... Cylinder, 11a... Piston rod, 12... Leaf spring, 13... C-shaped fitting, 14...
...Conductor, 15...Insulating plate, 16...Flexible conductor, 1
7...Electricity terminal.

Claims (1)

[Claims] 1 A leaf spring with one end fixed, a contact cylinder with the head side attached to the other end of the leaf spring,
The C-shaped fitting attached to the rod side of this cylinder,
A conductor, one end of which is supported by the internal bottom surface of the C-shaped fitting and a flexible conductor connected to the other end, is fixed relatively to the cylinder, and its end is located between the rod of the cylinder and the conductor. and an energizing terminal, and when the rod of the cylinder is extended and the tip of the rod presses the upper surface of the energizing terminal, the conductor moves upward together with the cylinder against the elastic force of the leaf spring. The top surface of the conductor and the bottom surface of the current-carrying terminal are in contact with each other, and when the rod is retracted, the top surface of the conductor and the bottom surface of the current-carrying terminal are separated by the restoring force of the leaf spring. A floating contact gun.