JPH0375970B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a high frequency current switching relay.

[Prior Art] Generally, in this type of high-frequency current switching relay, isolation between contact terminals forming a contact mechanism for high-frequency current switching is a problem. That is, when the distance between the contact terminals is reduced, stray capacitance increases, impedance between the contact terminals decreases, and high frequency characteristics deteriorate.

Therefore, as shown in FIG. 10, a U-shaped card 1 equipped with contact springs 4a and 4b made of wire and driven by an armature of an electromagnetic device, and a contact terminal 5 are provided.
a, 5b, 5c and ground terminals 11a', 11
A contact mechanism section is formed by the body 13 in which b', 11c', and 11d' are implanted. The card 1 is formed in a U-shape with two pieces 2a and 2b having different lengths,
A protruding piece 7 protruding from the central piece 3 of the card 1 is driven by an armature of an electromagnetic device, and is driven by contact springs 4a and 4b installed at different levels on both side pieces 2a and 2b. NC contact terminal 5a, COM
The contact terminal 5b, the NO contact terminal 5c, and the COM contact terminal 5b can be freely short-circuited. In addition, contact terminal 5
Contact spring 4a, which does not short-circuit a, 5b, 5c,
4b is the ground terminal 11a', 11b', 11c', 11
It is made to make elastic contact with d′.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional example, when the contact mechanism section and the electromagnet device are disposed close to each other, there is an adverse influence from the electromagnet device on the contact mechanism section, There was a problem that the high frequency characteristics deteriorated.

The present invention has been made in view of the above points, and its purpose is not only to reduce the influence of stray capacitance and improve high frequency characteristics, but also to
To provide a high-frequency current switching relay which can further improve high-frequency characteristics by shielding a contact mechanism part to prevent adverse effects from an electromagnetic device and has a simple structure.

[Means for Solving the Problems] The high-frequency current switching relay of the present invention has contact springs made of wire rods parallel to the center piece of the card at the tips of both sides of a U-shaped card that can freely slide back and forth. The contact terminals, which are opened and closed by each contact spring, and the card are housed in a shield case made of a metal plate, and a protruding piece protruding from the center piece of the card is attached to one side of the shield case. A ground connection terminal is formed by protruding out of the shield case from a notch provided in the shield case, driving the protruding piece back and forth by an armature, and cutting and raising the metal plate of the shield case outward.

[Function] The present invention is constructed as described above, and the center portions of contact springs made of wire rods parallel to the center piece of the card are supported at the tips of both side pieces of the U-shaped card, and each contact spring is configured as described above. Since the contact terminals are opened and closed, it is possible to reduce the influence of stray capacitance and improve high frequency characteristics, and the contact terminals, the contact spring and the card are housed in a shield case made of a metal plate, A protruding piece provided on the central piece of the card protrudes out of the shield case through a notch provided on one side of the shield case, and the protruding piece is driven back and forth by an armature, so the contact mechanism section is reliably shielded. This makes it possible to further improve high frequency characteristics by preventing harmful effects from the electromagnetic device.Furthermore, since the metal plate of the shielding case is cut and raised outward to form the ground connection terminal, the configuration can be simplified. It is becoming possible to do this.

[Embodiment] Figures 1 and 2 show an embodiment of the present invention. In this embodiment, a so-called 1T configuration relay is used, in which a COM contact terminal 5b is switched and connected to an NC contact terminal 5a or an NO contact terminal 5c. It shows
By attracting one end of the doglegged armature 9 to the electromagnetic device 12, the other end of the armature 9 presses and drives the card 1, and the contact springs 4a and 4b made of wire attached to the card 1 actuate the COM. NC contacts and NO contacts are brought into contact alternately.

To explain each part in detail, the U-shaped card 1 has both side pieces 2a and 2b having different lengths, and is slidable back and forth. Contact springs 4a and 4b parallel to the center piece 3 of the card 1 are installed at different levels at the tips of the side pieces 2a and 2b, respectively. Both contact springs 4a, 4b are made of wire and plated with gold, and the center portions of each contact spring 4a, 4b are supported by the side pieces 2a, 2b of the card 1. The contact terminals 5a, 5b, 5c, which are opened and closed by the contact springs 4a, 4b, are made of gold-plated wire, and from the right in the figure are NC contacts,
COM contact, NO contact, both contact springs 4a,
The contact springs 4b are arranged parallel to the contact springs 4a and 4b, and are implanted in the body 13 as shown in FIG. The contact terminals 5a, 5b, 5c, the contact springs 4a, 4b, and the card 1 are housed in a shield case 6 made of a metal plate with an opening on the top surface, and a notch 8 provided on the rear side of the shield case 6 is inserted into the center of the card 1. A protruding piece 7 that protrudes rearward from the piece 3 is protruded to the outside of the shield case 6. This protruding piece 7 is arranged opposite to one end of the dogleg-shaped armature 9. On the other hand, the front side surface and both left and right side surfaces of the shield case 6 are cut and raised outward, and a ground connection terminal 10 hanging down from the bottom surface of the shield case 6 is formed. Above shield case 6
is fitted into a recess 15 provided in the body 13,
Each contact terminal 5a, 5b, 5c is connected to the shield case 6 through a notch 16 formed in the bottom surface 14 of the shield case 6 by cutting and raising and a hole 17 formed in the bottom surface.
inserted within. Note that 18 is the recess 1 of the body 13.
This is the ground connection terminal insertion hole drilled at 5 and 19.
is a return spring whose one end is inserted and locked into a groove 20 provided in the protruding piece 7 of the card 1, and whose other end is fixed to the yoke 21 of the electromagnet device 12; It is a metal shield plate.

After installing the electromagnet device 12 on the body 13 and sandwiching the shield case 6 in the recess 15 of the body 13, the electromagnet device 12 and the card 1 are installed.
are engaged and connected by a return spring 19. The shield plate 22 is placed over the opening surface of the shield case 6, and is arranged so that the contact spring 4a connects the COM contact terminal 5b and the NC contact terminal 5a when the electromagnetic device 12 is not energized.

Now, when the electromagnet device 12 is excited, one end of the armature 9 is attracted to the electromagnet device 12, the protrusion piece 7 is pressed forward by the armature 9, the card 1 slides forward, and the contact spring 4b becomes the COM contact. terminal 5b and
Connect with NO contact terminal 5c. At this time, if the ground connection terminal 10 is connected to the ground, the stray capacitance between the contact terminals 5a, 5b, and 5c will be reduced, and the high frequency characteristics will be improved.

FIGS. 3 and 4 show another embodiment, in which the shield case 6 is cut inward at two points on the front and rear sides of the shield case 6 in a relay with a 1T configuration similar to the above embodiment. Earth terminals 11a, 11b, 11 installed inside
c, 11d are formed. That is, a pair of ground terminals 11a and 11b formed by cutting and raising the front side of the shield case 6 are connected to the contact spring 4.
The NC contact terminal 5a and the COM contact terminal 5b are arranged opposite to each other in front of the contact terminal 5a.
A contact spring 4a is positioned between the ground terminals 11a and 11b and the ground terminals 11a and 11b. On the other hand, another pair of ground terminals 11c and 11d are a COM contact terminal 5b and a NO contact terminal 5c at the rear of the contact spring 4b.
A contact spring 4b is positioned between each contact terminal 5b, 5c and each ground terminal 11c, 11d. Therefore, when the electromagnet device 12 is in a non-energized state, the contact spring 4 is in an open state.
Both ends of the contact spring 4a are in contact with the ground terminals 11c and 11d, and when the electromagnet device 12 is in the excited state, both ends of the contact spring 4a are in contact with the ground terminals 11a and 11b. Therefore, when the contact is opened, the contact spring 4
Since the so-called "floating" of a and 4b is eliminated, the high frequency characteristics are further improved. Moreover, for example, the 10th
As shown in the figure, special ground terminals 11a', 11
There is no need to provide b', 11c', and 11d', which simplifies the configuration.

Figures 5 to 7 show still other embodiments, in which the COM contact terminal 5 of the relay with the 1T configuration is shown.
b has a bifurcated structure, and a distance d is provided between the opposing end surfaces in the longitudinal direction of both contact springs 4a and 4b so that they do not overlap. The COM contact terminal 5b may connect the U-shaped part 23 and the straight part 24 vertically as shown in FIG. 7, or may connect the shaped part 25 as shown in FIG. 7b. With this configuration, stray capacitance generated at the overlapping portion of both contact springs 4a, 4b can be reduced.

Furthermore, in the above embodiment, by configuring the bifurcated COM contact terminal 5b with separate contact terminals, it is possible to configure a relay with a so-called 1a, 1b configuration in which two pairs of contacts are alternately opened and closed. .

FIG. 8 and FIG. 9 show still another embodiment, in which two pairs of contacts are opened and closed at the same time.
This relates to a relay with a configuration. That is,
Both sides 2a and 2b of the U-shaped card 1 are formed to have the same length, and both contact springs 4a and 4b are arranged in a straight line, and ground terminals 11a, 11b, 11
c, 11d are formed by cutting and raising the rear side of the shield case 6 inward, and are arranged opposite to each contact terminal 5a, 5b, 5c, 5d,
Both contact springs 4 are installed between the ground terminals 11a, 11b, 11c, 11d and the contact terminals 5a, 5b, 5c, 5d.
a and 4b are positioned. When the electromagnet device 12 is energized, the card 1 moves forward and both contact terminals 5a, 5b, 5c, 5d are closed simultaneously, and when they are opened, both contact springs 4a, 4b are connected to the ground terminals 11a, 11b, 11c. , 11d.

[Effects of the Invention] The present invention is constructed as described above, and the center portions of contact springs made of wire rods parallel to the center piece of the card are supported at the tips of both sides of the U-shaped card, and each contact Since the contact terminals are opened and closed by springs, it is possible to reduce the influence of stray capacitance and improve high frequency characteristics.In addition, the contact terminals, the contact springs, and the card are housed in a shield case made of a metal plate. The protruding piece protruding from the center piece of the card protrudes out of the shielding case through a notch provided on one side of the shielding case, and the protruding piece is driven back and forth by the armature, so that the contact mechanism section can be securely connected. By shielding, the negative influence from the electromagnetic device can be prevented and the high frequency characteristics can be further improved.Furthermore, the metal plate of the shield case is cut outward to form the ground connection terminal, making the configuration easy. The effect is that it can be done.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of one embodiment of the present invention, FIG. 2 is a front view of the same, FIG. 3 is an exploded perspective view of another embodiment, FIG. 4 is a front view of the same, and FIG. An exploded perspective view of another embodiment, FIG. 6 is a front view of the same as the above, FIGS. 7a and b are exploded perspective views of the main parts of the above, FIG. 1 is a front view of the same as above, and FIG. 10 is an exploded perspective view of essential parts of the conventional example. 1 is the card, 2a and 2b are the side pieces, 3 is the center piece,
4a and 4b are contact springs, 5a to 5d are contact terminals,
6 is a shield case, 7 is a protruding piece, 8 is a notch, 9
is an armature, and 10 is a ground connection terminal.

Claims (1)

[Claims] 1. The center portions of contact springs made of wire rods parallel to the center piece of the card are supported at the tips of both sides of a U-shaped card that can freely slide back and forth, and the contact terminals and the contact springs are opened and closed by each contact spring. and the card are housed in a shield case made of a metal plate, and a protruding piece protruding from the center piece of the card protrudes outside the shield case through a notch provided on one side of the shield case, and the protruding piece is connected to an armature. Drives forward and backward,
A high-frequency current switching relay made by cutting the metal plate of the shield case outward to form a ground connection terminal.