JPH0419841Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a structure for fixing an adjusting screw in a waveguide or the like.

[Conventional technology]

Conventionally, the electrical characteristics of waveguides, etc. have been adjusted by inserting adjustment screws into the waveguides. Or, a structure in which the adjustment screw is fixed by applying force from the lateral direction and pressing it using another screw has been implemented.

[Problem that the invention attempts to solve]

In the structure using the conventional nut described above, the fixation of the adjustment screw is uncertain, so it is necessary to strengthen the fixing part with adhesive, etc., and when readjustment is required in the field, such as with an equalizer, for example. The disadvantage was that it was not suitable.

On the other hand, in a structure in which other screws apply force to the adjustment screw from the side to fix it, the frequency increases because it depends on the frictional force at the point of contact between the other screws and the adjustment screw. When the size of the adjusting screw is reduced, there is a drawback that the distortion generated in the adjusting screw during fixing causes a change in the warming characteristics before and after fixing.

The present invention eliminates the above-mentioned drawbacks of the conventional methods, and makes it possible to fix the adjustment screw to the waveguide without using adhesive or causing distortion, and to prevent changes in electrical characteristics. The purpose is to provide a screw fixing structure.

[Means for solving problems]

The means of the present invention for solving the above problems includes: a hollow cylindrical mount part fixed to the outer surface of the waveguide and having an opening on the side;
It also has a fixing metal fitting with a through hole drilled therein and a horizontal screw fixed thereto, a collar having cushioning properties that is fitted into the through hole of the metal fitting, and a fixed part having an outer diameter that can be inserted into the collar. It consists of an adjustment screw inserted into the waveguide and a lockite screwed onto the horizontal screw, the collar is inserted into the mount part, the adjustment screw is inserted into the collar, and the adjustment screw is used to guide the wave. This is an adjustment screw fixing structure characterized in that after being attached to a pipe and adjusted, the adjustment screw is fixed by pressing the metal fitting against the adjustment screw through a collar with a lock nut.

[Effect]

The adjustment screw is pressed and fixed by a fixing fitting via a collar having cushioning properties. Therefore, almost no distortion occurs in the adjustment screw.

〔Example〕

Next, the present invention will be explained by way of an embodiment with reference to the drawings. FIG. 1 is an exploded perspective view of an embodiment of the present invention, and FIG. 2 is a cross-sectional view of an adjustment screw fixing part. In these figures, a mount portion 3 for mounting the adjusting screw on the waveguide 1 is fixed to the outer surface of the waveguide 1 on which the adjusting screw 2 is attached. The adjusting screw 2 includes a knob portion 2a at the top, a fixed portion 2b in the middle that is fixed externally, and an adjusting portion 2c inserted into the waveguide 1. The mount part 3 has a cylindrical shape in which a hollow part 3a is formed, and an enlarged part 3b is formed in the middle part of the hollow part 3a, and the enlarged part 3b opens on the side surface of the mount part 3. A metal fitting 4 for fixing the adjusting screw 2 to the mount part 3 is formed to a size that can be inserted into the enlarged part 3b, and has a through hole 4a having an inner diameter larger than the outer diameter of the fixed part 2b of the adjusting screw 2. Horizontal screw 4b on the side
is fixed. A lock nut 6 is screwed onto the horizontal screw 4b.

The metal fitting 4 is inserted into the enlarged part 3b, and the adjusting screw 2 is inserted into the hollow part 3a of the mount part 3. At this time, the fixed part 2b of the adjusting screw 2 is fitted with a collar 5 having cushioning properties, so that the metal fitting 4 penetrates. It is inserted into the hole 4a together with the collar 5, and the adjustment part 2c at the tip is connected to the waveguide 1.
inserted at the optimal position. Once the position of the adjustment screw is determined, the lock nut 6 is rotated to move the metal fitting 4 and fix the adjustment screw 2 to the mount portion 3. At this time, the adjustment screw 2 is a collar 5 with cushioning properties.
Since it is fixed to the mount part 3 via the cushioning collar 5, the occurrence of distortion is greatly suppressed, and since the contact area receiving force is increased by the cushioning collar 5, changes in electrical characteristics when fixed are also suppressed. can. The adjustment screw 2 can be readjusted easily by loosening the lock nut 6.

[Effect of idea]

According to the present invention, since a collar with cushioning properties is used to fix the adjustment screw, distortion of the adjustment screw is extremely rare, and therefore there is almost no change in electrical characteristics, and the adjustment screw is hardly distorted. This is extremely easy to do, and the adjustment screw can be securely fixed.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of one embodiment of the present invention;
The figure is a sectional view of an adjustment screw fixing part according to an embodiment of the present invention. 1... Waveguide, 2... Adjustment screw, 3... Mount section, 4... Metal fittings, 5... Collar, 6... Lock nut.

Claims (1)

[Scope of utility model registration request] A hollow cylindrical mount part fixed to the outer surface of the waveguide and having an opening on the side surface, a fixing fitting inserted through the opening of the mount part, having a through hole bored therein and having a horizontal screw fixed thereto, and the fitting part A collar having cushioning properties that is fitted into a through hole, an adjusting screw that is inserted into a waveguide having a fixed portion with an outer diameter that can be inserted into the collar, and a locking nut that is screwed onto the horizontal screw. The collar is inserted into the mount portion, the adjustment screw is inserted into the collar, and after the adjustment screw is attached to the waveguide and the adjustment is made, the metal fitting is pressed against the adjustment screw via the collar with a lock nut to make the adjustment. An adjustable screw fixing structure characterized by fixing the screw.