JPH0411361Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a diode mounting device, and more particularly to a device for mounting a microwave diode housed in a microwave case.

[Conventional technology]

As shown in Figure 2, most microwave diodes (hereinafter referred to as diodes) 1 use a columnar envelope with a step tapering toward the tip. . That is, a cylindrical case 3 made of metal, ceramic, or the like is adhered to a disc-shaped stem 2, and an electrode 4 of a smaller diameter is provided at the tip of the case 3. This electrode 4 is an anode electrode, and the stem 2 is a cathode electrode. Note that the polarity of the electrodes may be opposite to this.

In order to attach such a diode 1 to the casing of a mixer or the like in a state that it can be replaced later,
Conventionally, mounting devices as shown in FIGS. 2, 3, and 4 have been used.

The conventional mounting device is roughly divided into a cylindrical storage body 5 that is fixed to the casing side, and a cap 7 that screws into and seals the opening 6 of the housing body. For installation, the diode 1 is inserted into the housing 5 with its anode electrode 4 side facing upward, and then the cap 7 is fitted into the opening 6 to house the diode 1.

The fixing structure of the diode 1 will be explained in more detail. The diode 1 is fixed so as to prevent movement in the radial direction on both the rear end side and the front end side. First, starting from the rear end side, the opening 6 of the storage body 5 is formed into a slit shape with a plurality of slits cut in the axial direction, as shown in FIG. A cap 7 is screwed into this opening 6, and as the screwing progresses, the inner peripheral surface of the cap 7 tightens the outer periphery of the opening 6, so that each slotted piece of the opening 6 is connected to the diode 1. Body 1'
It is designed to tighten. Eventually, the stem 2 of the diode 1 comes into contact with the tip end surface of the opening 6, and the diode 1 is prevented from entering further into the storage body 5 and is fixed.

On the other hand, as for fixing the tip side of the diode 1, as shown in FIGS.
A slit-shaped post 8 is fitted onto the anode electrode 4 of the anode electrode 4, and the post 8 is pushed into a cylindrical insulating pair guide 9 provided in the storage body 5 with the post 8 as the head. As a result, the outer periphery of the post 8 is restrained by the guide 9 and tightens the body of the anode electrode 4 of the diode, so that the post 8 is fixed at the tip side of the diode 1.

In addition, in FIGS. 3 and 4, 10 is a connector pin, 11 is a contact, and 12 is a coil spring.

[Problem that the invention attempts to solve]

In the above-mentioned diode mounting apparatus, the structure of the mounting apparatus is complicated, and it takes time and effort to replace the diode. In addition, since the support structure of the diode is mainly tightened in the radial direction of the diode with a slit structure, looseness is likely to occur at the tightened part, and the electrical contact is insufficient. The problem was that it changed from time to time.

Therefore, an object of the present invention is to provide a diode mounting device that has a simple structure, provides stable electrical contact, and has good electrical characteristics.

[Means for Solving the Problems] In order to achieve the above object, a diode mounting device according to the present invention includes a cylindrical housing and a cap that is fitted into the opening of the housing, and a cap that is fitted into the housing. ,
In a diode mounting device in which a columnar diode having a stepped portion consisting of a tip columnar portion and a large diameter portion connected to the tip columnar portion via a shoulder surface is inserted and attached, the diode is mounted inside the storage body. A guide portion is provided into which the tip columnar portion of the diode is inserted and engaged with the shoulder surface of the diode in contact with the opening of the insertion port, and the guide portion is fitted into the inner bottom surface of the cap. A biasing member is provided which contacts the rear end surface of the diode and biases the diode in the direction of its tip, and the biasing member is comprised of a spring member that presses the rear end surface of the diode via a snap spring. The snap ring is characterized in that its outer diameter is larger than the outer diameter of the rear end face of the diode.

[Function] In this way, at the tip of the diode, the tip columnar part is inserted into the guide part and the shoulder surface is engaged with the opening of the guide part, while the diode The structure is such that the rear end surface is pressed and biased in the distal direction by a biasing member, and the biasing member is composed of a spring member such as a spring washer that presses the rear end surface of the diode via a snap spring, and the snap spring By forming the outer diameter of the diode to be larger than the outer diameter of the rear end face of the diode, positioning of the diode is performed by the stepped portion and the guide portion. In addition, since the rear end surface of the diode receives the biasing force of the spring washer while in contact with the snap spring having a large outer diameter, the biasing force acts only in the axial direction of the diode, and By bringing the snap spring into contact with the rear end surface of the diode, which has a smaller area, the biasing force becomes uniform. This makes it difficult for the diode to wobble in the radial direction, so a stable contact can be obtained. Since stable contact and accurate position are maintained in this way, variations in impedance can be prevented.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a cross-sectional view of the structure of the mounting device according to the present invention. In FIG. 1, a guide portion 103 is fitted on the inner circumferential tip side of the storage body 101 via an insulator 102. As shown in FIG. The guide part 103 also serves as an electrode,
Its inner diameter is slightly larger than the outer diameter of the anode electrode 4, which is the tip columnar portion of the diode 1, so that the anode electrode 4 is loosely fitted therein. On the other hand, a spring washer 105 having a biasing force in the axial direction is provided at the inner bottom of the cap 104 and is sandwiched between two hole snap rings 106 and 107. The snap pull ring 106 is in contact with the rear end surface of the diode 1, and its outer diameter is larger than the outer diameter of the rear end surface of the diode 1. As a result, the rear end face of the diode 1 having a small area is pressed by a large biasing area.

In the above structure, when installing the diode 1, the anode electrode 4 of the diode 1 is fitted into the guide portion 103, and then the cap 104 is screwed into the opening 108 of the storage body 101. This cap 104
As the screwing progresses, the stem 2 of diode 1
A ring washer 106 comes into contact with the back surface of the diode 1, and the biasing force of the spring washer 105 causes the diode 1 to
is pushed into the storage body 101. Then, with the shoulder surface of the stepped part of the anode electrode 4 and the large diameter part of the case 3 connected thereto in contact with the opening 14 of the guide part 103, the positioning is performed while being biased by the spring washer 105. be done. In this way, the anode electrode 4 of the diode 1 is always biased in the direction of contacting the guide portion 103, and the diode 1 with a small area is biased with a large bias area.
Since the rear end surface is pressed, the biasing force becomes uniform.
Therefore, looseness in the radial direction is less likely to occur, and electrical contact is improved.

Note that instead of the spring washer, a wave washer or the like having a biasing force may be used. In addition, the storage body 101 and the cap 104 are preferably made of metal in consideration of microwaves, but if such considerations are not necessary, resin, ceramic, or the like may be used.

[Effect of idea]

As described above, according to the present invention, it is possible to provide a mounting device that provides stable electrical contact with a simple structure, has good electrical characteristics, and allows easy mounting of a diode.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing the structure of the mounting device according to the present invention, Fig. 2 is a perspective view showing the relationship between the conventional mounting device and the diode, and Figs. 3 and 4 are the fitting of the conventional mounting device. It is a longitudinal cross-sectional view showing a state. 4... Anode electrode, 101... Storage body, 10
3... Guide portion, 104... Cap, 105...
...Spring washer, 108...opening.

Claims (1)

[Scope of utility model registration request] It comprises a cylindrical storage body and a cap fitted into the opening of the storage body, and has a stepped portion in the storage body consisting of a tip columnar portion and a large diameter portion connected to the tip columnar portion via a shoulder surface. In a diode mounting device in which a columnar diode is inserted and attached, the tip columnar part of the diode is inserted into the housing and the shoulder surface of the diode is in contact with the opening of the insertion port. A guide portion to be engaged is provided, and a biasing member is provided on the inner bottom surface of the cap to abut on a rear end surface of the diode engaged with the guide portion and urge the diode toward its tip. A diode mounting device characterized in that the biasing member comprises a spring member that presses the rear end surface of the diode through a snap spring, and the outer diameter of the snap spring is larger than the outer diameter of the rear end surface of the diode. .