CN104021955A - Constant contact force movement technology - Google Patents

Abstract

According to the invention, the problem that unstable contact force between microwave transmission line contacts due to changes of electromagnetic driving force inside a microwave mechanical switch is solved so as to guarantee that constant contact force is always maintained between the microwave transmission line contacts, raise stability and consistency of microwave electrical performance of the microwave mechanical switch and help prolong mechanical life of the switch. As a buffer spring is additionally arranged inside a guide rod and the guide rod adopts a split-type structure, a guide rod which is originally rigid becomes an elastic guide rod. When the guide rod pushes under the driving force a conductor at the center of a microwave transmission line to the contact positions of the contacts, the buffer spring inside the guide rod begins to be compressed. At the moment, contact force between the contacts is converted to elastic force of the buffer spring. As amount of compression of the buffer spring can be designed as a definite value by additionally arranging a location step on the guide rod, the contact force between the contacts of the microwave transmission line is always a fixed elastic force generated by a certain amount of compression of the buffer spring. Thus, constant contact force between the contacts of the microwave transmission line is realized.

Description

Constant contact force Motion Technology

Technical field

The present invention relates to a kind of microwave switch, particularly a kind of constant contact force Motion Technology.

Background technology

Microwave mechanical switch is to realize for microwave communication and Auto-Test System the electromechanical assembly that microwave signal is transmitted and switched.Also referred to as microwave relay.Can be divided into microwave mechanical switch open in usual and magnetic freeze mode microwave mechanical switch by control mode.The operation principle of microwave mechanical switch open in usual is the motion of one or more microwave transmission line center conductor of motion control of consisting of one or more groups electromagnet, realizes being switched on or switched off of microwave transmission line.Switching on and off of microwave transmission line is a little contact.When microwave transmission line is connected, the stability of the indirect touch in contact has determined the stability of microwave transmission line Contact resistance, and the stability of contact resistance is directly connected to the useful life of microwave mechanical switch and the stability of electrical performance indexes.

Microwave mechanical switch prior art scheme open in usual: its motion is made up of members such as electromagnet, push rod, guide rod, back-moving springs, can directly drive the motion of microwave transmission line center conductor.In the time that microwave transmission line need to be connected, the actuating force jointly being formed by electromagnet magnetic field force and motion frictional damping promotes microwave transmission line center conductor and contacts with internal conductor of coaxial connector, thereby has realized being interconnected of microwave transmission line.In existing design, actuating force acts directly in transmission line contacts, forms contact force.Due to the fluctuation of the drive current of electromagnet own, voltage and the variation of motion frictional damping, cause finally acting on also corresponding fluctuation of actuating force on microwave transmission line center conductor, thereby the contact force between contact is changed, affected mechanical switch electrical performance indexes stability and mechanical endurance.

Summary of the invention

Technology of the present invention is dealt with problems and is: overcome the deficiencies in the prior art, a kind of constant contact force Motion Technology is provided, solve microwave mechanical switch inside and change the unsettled problem of contact force between the microwave transmission line contact causing because of electromagnetic actuation force, thereby between guarantee transmission line contacts, remain constant contact force, improve stability and the consistency of microwave mechanical switch microwave electrical property, and be conducive to extend the mechanical endurance of switch.

Technical scheme of the present invention is: at the inner buffer spring that increases of guide rod, guide rod adopts split-type structural simultaneously, makes original rigid guide become elastic guide rod.In the time that guide rod promotes microwave transmission line center conductor arrival contact contact position under actuating force effect, guide rod internal damping spring starts compressed, now the contact force between contact is converted to the elastic force of buffer spring, because the decrement of buffer spring can be designed as definite value by add positioning step on guide rod, therefore the contact force between microwave transmission line contact is always the fixing value of elastic that buffer spring produces in certain decrement, thereby has realized the constant contact force between microwave transmission line contact.

The present invention's technique effect is compared with prior art:

(1), in existing design, contact force is acted directly in transmission line contacts and is formed by actuating force.Due to the fluctuation of the drive current of electromagnet own, voltage and the variation of motion frictional damping, also there is corresponding fluctuation in the actuating force that causes finally acting on microwave transmission line center conductor, thereby the contact force between contact is changed, affected mechanical switch electric performance stablity.And change while exceeding certain limit when actuating force and contact force, also can microwave transmission line center conductor be caused and be had a strong impact on fatigue life.

(2) the object of the invention is to form constant force device by introducing flexible member at motion, realize the constant contact force between microwave transmission line contact, thereby improve electric performance stablity and the mechanical endurance of microwave mechanical switch.

(3) between mechanical switch internal transmission line of the present invention contact, contact force is not affected by electromagnet magnetic field force and motion frictional damping, each closure all can keep constant contact force, effectively improve stability and the consistency of the electric property of radio frequency mechanical switch, and can significantly improve the useful life of product.

Key point of the present invention and protection point are: (1) inner Split type flexible guide rod with buffer spring; (2) guide rod location structure.

Brief description of the drawings

Fig. 1 is technical scheme structural representation of the present invention;

Fig. 2 is internal structure schematic diagram of the present invention;

Fig. 3 is split type guide rod structure figure of the present invention;

Fig. 4 is prior art scenario-frame schematic diagram.

Embodiment

As shown in Figure 1, 2, 3, the invention provides a kind of constant contact force Motion Technology, be mainly reflected in 1 push rod, 2 buffer springs, 3 split type guide rods, 4 coaxial inner conductors, 5 electromagnet, 6 back-moving springs, 7 positioning steps, 8 center of transmission line conductors, 9 contacts.

As shown in Figure 1, 2, 3, the inner 3 Split type flexible guide rods with 2 buffer springs; 3 guide rod location structures (7 positioning step).

The content not being described in detail in specification of the present invention belongs to those skilled in the art's known technology.

Claims (2)

1. constant contact force Motion Technology, change the unsettled problem of contact force between the microwave transmission line contact causing for solving microwave mechanical switch inside because of electromagnetic actuation force, thereby between guarantee transmission line contacts, remain constant contact force, improve stability and the consistency of microwave mechanical switch microwave electrical property, and be conducive to extend mechanical endurance of switch, it is characterized in that: the inner Split type flexible guide rod with buffer spring.

2. constant contact force technology according to claim 1, is characterized in that: guide rod location structure.