JPH0321066Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a variable delay line using a lumped constant type or distributed constant type electromagnetic delay line, and in particular to a variable delay line that can handle ultra-high speed signals. Regarding the improvement of

[Prior art and its problems]

For this type of variable delay line, for example, a conductor strip is wound around the outer circumference of a rod-shaped bobbin in the shape of a single-layer solenoid, and a capacitor is connected between each turn and the ground to form an electromagnetic delay line. Conductive plates are arranged at intervals along the line, and a contact spring (movable contact) is placed in elastic contact with the conductor strips and the conductive plates and is slidable in the axial direction of the electromagnetic delay line. There is something.

In such a variable delay line, when an ultrahigh-speed signal is applied to the conductive plate, the signal is output with a predetermined delay time, and the delay time can be changed by sliding the contact spring.

Since such a variable delay line handles ultra-high-speed signals, it is possible to maintain and improve the reliability of the variable mechanism by using contact springs with a small size and simple structure to keep the inductance small. It's important.

In order to maintain and improve the reliability of the variable mechanism by keeping the inductance of the contact spring small, the strain of the contact spring in contact with the fixed contact (the part of the conductor strip that contacts the contact spring) and the conductive plate must be kept constant. It is necessary to stabilize the contact pressure. In order to keep this deflection constant, it is said that it is necessary to maintain a constant distance between the fixed contact and the conductive plate, or more precisely, the distance between the fixed contact and the conductive plate of the part that contacts the contact spring. ing.

[Purpose of invention]

The present invention was developed under these circumstances, and it is possible to maintain a constant distance between the conductive plate and the fixed contact, has a highly reliable variable mechanism, and is a high-quality and inexpensive variable delay line. For the purpose of providing.

[Structure and effect of the idea]

To achieve this objective, the present invention includes an electromagnetic delay line consisting of an inductor and a capacitor, a fixed contact array consisting of a plurality of fixed contacts provided on the inductor of this electromagnetic delay line, and a conductive plate arranged to face the fixed contact row, a movable contact elastically in contact with the fixed contact row and the conductive plate and slidably arranged along the fixed contact row, an electromagnetic delay line thereof, and a fixed contact. In a variable delay line that includes a case in which a row of contacts, a conductive plate, and a movable contact are housed, the fixed contact row and the conductive plate are integrated by being supported by the same support member separate from the case, and It is stored in.

According to the configuration of the present invention, since the fixed contact array and the conductive plate are supported by the same support member, the number of structural members connecting the fixed contact array and the conductive plate is reduced, thereby improving the positioning accuracy of both. This makes it possible to keep the distance between the fixed contact array and the conductive plate constant.

Therefore, the reliability of the variable mechanism is increased by suppressing fluctuations in the deflection of the movable contact, and it is possible to maintain good characteristics and maintain high quality.

Furthermore, since the device can be stored in the case while maintaining a constant distance between the fixed contact array and the conductive plate, assembly efficiency can be improved and costs can be reduced.

[Example of idea] The details of the present invention will be explained below.

Figures 1 and 2 are a front view and a side view (both partially shown in section) showing an embodiment of the present invention.
It is.

In both figures, a case 1 is formed by molding synthetic resin or the like into a box shape that is open from the top, and has ground terminals 3, 4 and input/output terminals 5, 6 supported so as to pass through the bottom 2 thereof. A ground plate 7 integrally formed with ground terminals 3 and 4 is provided at the bottom 2 of the case 1.
is attached.

In addition, the ground terminals 3, 4 and the ground plate 7 are
It is formed by punching and bending a single conductive plate.

In the case 1, an inductance element 8 is installed horizontally. This inductance element 8 is formed by winding a conductor strip 10 in the shape of a single layer solenoid around an elongated rod-shaped insulating bobbin 9 as shown in FIG. It is placed horizontally so that it is in contact with the ground plate 7.

A capacitor dielectric plate 13 having a capacitor ground electrode 12 formed on its lower surface is arranged between the bobbin 9 and the ground plate 7 so that the capacitor ground electrode 12 is in contact with the ground plate 7 and its upper surface is in contact with the conductor strip 10. ing.

Therefore, the lower conductor strip 10 and the capacitor ground electrode 1 in the horizontally placed inductance element 8
A capacitor is formed between each turn of the inductance element 8, and a lumped constant electromagnetic delay line 14 having a plurality of sections connected to a capacitor is formed between each turn of the inductance element 8 and the ground.

Above the inductance element 8 in the case 1, conductive plates 15 made of beryllium copper are arranged at intervals.

As shown in FIG. 3B, this conductive plate 15 has mounting pieces 16 bent so as to hang down from both ends of the conductive plate 15, and holes 17 formed in this mounting piece 16 are connected to the bobbin 9. Protrusions 1 formed on both end faces
It is supported by the bobbin 9 by being press-fitted into the bobbin 8 .

The conductive plate 15 has a recess 1 along the electromagnetic delay line 14.
9, and a slit 20 is provided at the bottom of the recess 19 to insert the electromagnetic delay line 14.
It is formed along the

A spring holder 21 is arranged between the inductance element 8 and the conductive plate 15.

This spring holder 21 is formed into a frame shape, and a partition plate 22 that partitions the center of the spring holder 21 has a slit 2.
The conductive plate 15 is sandwiched and supported by a knob 24 attached to the protrusion 23 and the upper surface of the spring holder 21.

A contact spring 25 as a movable contact made of a long and thin conductor curved into a bow shape is housed in the spring holder 21, and the central bulging part of the contact spring 25 is brought into elastic contact with the conductor strip 10, and both ends are brought into contact with the conductor strip 10. is brought into elastic contact with the conductive plate 15.

Therefore, by sliding the knob 24 within the recess 19, the contact spring 25 is inserted into the conductive plate 15.
While contacting with the conductor strip 10 of each turn, the conductor strip 10 slides.

That is, the conductor strip 10 that the contact spring 25 contacts
The fixed contacts 26 of each turn form a fixed contact row 27, and the contact spring 25 moves on the fixed contact row 27 while contacting the conductive plate 15.

For a variable delay line configured in this way,
A part of the conductor strip 10 wound around the outer periphery of the bobbin 9 becomes a fixed contact 26 to form a fixed contact row 27, while the conductive plate 15 is attached to both ends of the bobbin 9 via the mounting piece 16 of the conductive plate 15. Since the fixed contact array 27 is connected to the conductive plate 15 by the bobbin 9, the number of components connecting the two is minimized.

Therefore, if the dimensions of the mounting piece 16, hole 17, and protrusion 18 are selected to be suitable for dripping, it becomes easy to maintain a constant distance between the fixed contact row 27 and the conductive plate 15, so that the contact spring 25 with small dimensions can be easily maintained. It becomes possible to keep the deflection constant while keeping the inductance small, making it suitable for handling ultra-high-speed signals and improving the reliability of the variable mechanism.

Furthermore, it is extremely easy to obtain the optimum values for the dimensions of the mounting piece 16, hole 17, protrusion 18, etc., and if these optimum values are set when manufacturing the mold, variations can be suppressed during mass production. .

Furthermore, during the assembly process, the conductive plate 1 is attached to the bobbin 9.
5 is attached and integrated and stored in the case 1, the fixed contact array 27 and the conductive plate 15
They can be easily housed in the case 1 with a constant spacing between them, which improves assembly efficiency and reduces costs.

Further, since the conductive plate 15 is bent along the axial direction of the electromagnetic delay line 14 so as to form the recess 19, the mechanical strength of the conductive plate 15 can be made extremely strong.

FIGS. 4 and 5 are partial perspective views showing other embodiments of the variable delay line of the present invention.

The variable delay line shown in FIG. 4 has a substrate 30 on which an inductance element 28 is formed by winding a conductive wire in multiple turns around a bobbin 9, and a plurality of fixed contact electrodes 29 are formed in parallel in a direction perpendicular to the axial direction of the inductance element 28. is supported on the bobbin 9, and fixed contact electrodes 29 are connected with lead wires 31 at both ends of the inductance element 28 and at each predetermined turn.
A contact spring 25 as shown in the figure is configured to be slidable along the axial direction of the inductance element 28 at the center of the fixed contact electrode 29. .

In FIG. 4, reference numeral 32 is a groove formed in the fixed contact electrode 29, which is depressed when the contact spring 25 comes into contact with the fixed contact electrode 29 to ensure stability of the contact spring 25.

Further, the reference numeral 11a indicates the leg portion 1 of the bobbin 9.
1 and a base provided on the side surface opposite to the substrate 3.
0 is supported.

Note that the supporting structure of the conductive plate 15 to the bobbin 9 is the same as that shown in FIG. 1, so illustration thereof is omitted.

In this way, the variable delay line of the present invention is not limited to the example using the inductance element 8 in which the conductor strip 10 is wound around the bobbin 9 in the form of a single-layer solenoid. It is also possible to form the fixed contact array 27 not only with a part of the conductor strip 10 but also with a part of the fixed contact electrode 29 formed on another substrate 30. , a configuration in which the bobbin 9 is supported via the substrate 30 is also possible.

The variable delay line shown in FIG. 5 is a bent electromagnetic delay line formed by forming a ground plate 34 and a bent conductive line 35 facing each other on the upper surface of the bobbin 9 shown in FIG. 1 with a capacitor dielectric plate 33 in between. track 36
The bobbin 9 is used as a support member for the electromagnetic delay line itself.

Note that the structure for attaching the conductive plate 15 to the bobbin 9 is the same as in the embodiment described above.

This variable delay line is configured so that the contact spring 25 (not shown) shown in FIG. The central portion of the conductive line 35 functions as a fixed contact, forming a fixed contact array.

In this way, in the present invention, the supporting member that supports the fixed contact array and the conductive plate is not limited to the example using the bobbin of the inductance element, but can be composed of a member that supports the electromagnetic delay line itself, and the shape can be established arbitrarily. However, it is preferable that the electromagnetic delay line and the conductive plate be integrated and housed in the case 1.

In addition, the fixed contact array is not limited to the case where it is directly supported by a support member such as a bobbin, but it is also possible to
It is also possible to support the conductive plate through the bent line main body as shown in the figure, and in the case of a structure in which the conductive plate is supported by the support member, an example in which the mounting piece is bent from the end of the conductive plate and attached to the end of the support member is also possible. However, other support configurations are also possible.

Further, the variable delay line of the present invention can be implemented using a distributed constant type electromagnetic delay line consisting of an inductor and a capacitor, for example as shown in FIG. In this case, a conductor serving as an inductor may be wound in a single-layer solenoid shape around the outer periphery of a support member in which a ground plate is embedded.

As explained above, the present invention has a configuration in which the fixed contact array and the conductive plate are supported by the same support member and housed in a case integrally formed with the fixed contact array and the conductive plate. It is now easy to store in a case while keeping the distance between the row and conductive plate constant, suppressing fluctuations in the deflection of the movable contacts, improving the reliability of the variable mechanism, and improving assembly efficiency and reducing costs. It is possible to reduce the

[Brief explanation of drawings]

1 and 2 are a front view and a side view (partially shown in cross section) showing an embodiment of the variable delay line of the present invention, and FIGS. 3A and 3B are the support member and conductive plate shown in FIG. 1. FIGS. 4 and 5 are perspective views of main parts showing other embodiments of the present invention. DESCRIPTION OF SYMBOLS 1... Case, 8, 28... Inductance element, 9... Support member (bobbin), 10... Inductor (conductor strip) 14... Electromagnetic delay line, 15... Conductive plate, 16... Mounting piece, 17 ... hole, 21 ... spring holder, 24 ... knob, 25 ... movable contact (contact spring), 26 ... fixed contact, 27 ... fixed contact row, 29 ... fixed contact electrode, 30 ... substrate, 3
5...Inductor (bent conductor line), 36...
...Electromagnetic delay line (bent line).

Claims (1)

[Claims for Utility Model Registration] (1) An electromagnetic delay line consisting of an inductor and a capacitor, a fixed contact array consisting of a plurality of fixed contacts provided on the inductor of this electromagnetic delay line, and along this fixed contact array a conductive plate disposed to face the fixed contact array; a movable contact elastically in contact with the fixed contact array and the conductive plate and slidably disposed along the fixed contact array; and the electromagnetic delay line and the fixed contact. a case in which a row of fixed contacts, a conductive plate, and a movable contact are housed; A variable delay line characterized by being housed in a. (2) The variable delay line according to claim 1, wherein the inductor of the electromagnetic delay line is formed by forming a conductor in the form of a single-layer solenoid on a support member, and a fixed contact is provided on the conductor. (3) An inductor of an electromagnetic delay line is formed by winding a conductor around a supporting member, and a substrate on which a plurality of fixed contacts are formed is supported by the supporting member, and the fixed contacts are connected to each predetermined turn of the conductor. Scope of utility model registration claim 1 consisting of connected contacts
Variable delay line as described in section. (4) The variable delay line according to claim 1, wherein the electromagnetic delay line is a bent line supported by a support member, and a fixed contact is formed on the conducting path of the bent line. (5) Utility model registration claim 1 in which the conductive plate is bent along the sliding direction of the movable contact
The variable delay line according to any one of Items 1 to 4.