JP3758936B2 - Jig for assembling tuning rod member of dielectric resonator - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a jig for assembling a tuning rod member in a dielectric resonator having a resonator portion and a support base portion.
[0002]
[Prior art]
This type of dielectric resonator has a resonator part made of a dielectric material and a support base made of a material different from the material of the resonator part, and the resonator part is bonded onto the support base with an adhesive or the like. There are known types in which the resonator unit and the support base are integrally formed of the same dielectric material. These dielectric resonators are fixed to the bottom wall of a sealed casing called a cavity, and are used by adjusting the tuning frequency to a desired resonance frequency by inserting an adjustable tuning rod in the hollow portion of the dielectric resonator. (See Japanese Patent Laid-Open Nos. 59-97201, 61-258504, and 62-97405).
In general, a dielectric resonator composed of a resonator section and a support base itself is designed to have a certain range of resonance frequencies. Therefore, for example, it is disclosed in Japanese Patent Laid-Open No. 62-97405 mentioned above. As described above, the dielectric resonator is configured to adjust the resonance frequency with a frequency adjusting screw so as to meet the actual specification. As a member used for frequency adjustment, a rod-shaped body concentrically bonded with an adhesive to a cylindrical head portion (dielectric head) of a dielectric material (usually called a tuning bar) is used. .
[0003]
[Problems to be solved by the invention]
As described above, the tuning rod used to adjust the frequency of the dielectric resonator to the actual specifications is mainly concentric with a cylindrical head of dielectric material by adhesive in terms of cost. Because it is a bonded structure, when the rod-shaped body is concentrically bonded to the center of the columnar head with an adhesive, misalignment or tilting of the rod-shaped body with respect to the columnar head occurs. As a result, there is a problem that even if the deviation or inclination is in a range that can be used as a tuning rod, there is a variation among the tuning rods, making it difficult to perform an accurate tuning operation. . Therefore, skilled workers carefully perform the bonding operation between the columnar head and the rod-shaped body.
[0004]
Accordingly, an object of the present invention is to provide a jig used to easily produce a tuning rod used for frequency adjustment of a dielectric resonator without variation.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, a resonance frequency characteristic is obtained by combining with a dielectric resonator including a resonator portion and a support base portion and cooperating with the resonator portion of the dielectric resonator. In a jig for assembling a tuning rod member formed by adhering a dielectric head portion and a rod portion to adjust the cylindrical outer cylinder member having an inner peripheral surface that slidably receives the head portion of the tuning rod member; The head of the tuning rod member has two separable half parts which are inserted into the outer cylindrical member and which are combined with each other to form an inner cylindrical member for aligning and guiding the tuning rod member. An adhesive relief recess for joining one end of the bar portion of the tuning bar member to the portion is provided at at least one end of each of the two half portions.
[0006]
The assembling jig may further include a lid member that is fitted to the inner peripheral surface of the cylindrical outer cylinder member and that has one end engaged with the other end of the tuning rod member.
In the present assembly jig, preferably each of the two half portions can be formed to have a symmetrical cross-sectional shape from the center to the tip.
Preferably, at least two contact surfaces that contact the outer peripheral surface of the bar portion of the tuning bar member may be provided on the inner peripheral surface of each of the two half portions at intervals in the longitudinal direction.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows an embodiment of a jig for assembling a tuning rod member of a dielectric resonator according to the present invention. Reference numeral 1 denotes a tuning rod member which resonates in cooperation with a resonator portion of the dielectric resonator. The dielectric head portion 2 has a dielectric head portion 2 and a rod portion 3 for adjusting the frequency characteristics. The dielectric head portion 2 has a height and a height corresponding to the dimension of the hollow portion of the resonator portion of the dielectric resonator to be applied A cylindrical body whose diameter can be determined is formed, and a circular concave portion 2a is formed in the central portion of one end face thereof, and one end of a rod portion 3 is concentrically bonded to the circular concave portion 2a with an adhesive 4. A recess 3a is formed at the center of the other end of the rod portion 3, and a screw member 5 is attached to the recess 3a.
[0008]
The illustrated assembling jig includes a cylindrical outer cylinder member 6, two separable half portions 7 constituting the inner cylinder member, and a lid member 8. The cylindrical outer cylinder member 6 has a length that can accommodate the tuning rod member 1 and an inner diameter that allows the dielectric head portion 2 of the tuning rod member 1 to slide fit.
[0009]
Each of the two separable half portions 7 constituting the inner cylinder member has a substantially semicircular cross section as shown in an end view in FIG. 2, and its outer peripheral surface is a cylindrical outer cylinder member 6. An adhesive 4 is formed so as to be slidably fitted to the inner peripheral surface, and bonds one end of the rod portion 3 to the head portion 2 of the tuning rod member 1 at both ends of the inner peripheral surface of each half-body portion 7. A recess 7a for escape is formed, and two contact surfaces for alignment guide of the rod portion 3 of the tuning rod member 1 are formed on the inner peripheral surface of each half portion 7 following each of the recesses 7a at both ends. 7b is formed. Further, the inner peripheral surface portion between the two contact surfaces 7b in each half portion 7 has an inner diameter slightly larger than the inner diameter of the contact surface 7b as indicated by reference numeral 7c, and the outer periphery of the rod portion 3 of the tuning rod member 1 is shown. A gap is formed between the surface.
The two separable half portions 7 constituting the inner cylinder member constructed in this way have a symmetrical cross section from the center to the tip of each half portion 7 (up and down symmetry in the drawing). Can be inserted into the outer cylindrical member 6 without having to consider the longitudinal direction of each half part 7 and therefore can be assembled without considering directionality, and has excellent operability. I mean. Further, by providing the contact surfaces that contact the bar portion 3 of the tuning rod member 1 in two places, the centering guidance for the bar portion 3 of the tuning rod member 1 can be performed reliably and accurately.
[0010]
The lid member 8 is formed in a cylindrical shape so as to be slidably fitted to the inner peripheral surface of the outer cylinder member 6, and a locking hole 8 a extending in the axial direction is provided at one end of the lid member 8. The screw member 5 in the tuning rod member 1 is engaged with the dielectric member, and the screw member 5 is guided so as to be concentric with the dielectric head portion 2 and the rod portion 3 on the central axis.
[0011]
In the use of the illustrated jig configured as described above, first, the dielectric head portion 2 in which the adhesive 4 is applied to the circular recess 2a at the center of one end surface and the inner cylinder member can be separated in the outer cylinder member 6. The two half parts 7 are fitted, and then the rod part 3 is inserted into the central hole defined by the two half parts 7, and the screw member 5 is attached to the recess 3 a at the other end of the rod part 3. Then, the screw member 5 is screwed into the locking hole 8 a of the lid member 8 and the lid member 8 is rotated and fitted into the outer cylinder member 6. Thus, the dielectric head portion 2, the rod portion 3 and the screw member 5 are positioned concentrically with each other on the central axis while pressing the rod portion 3 against the circular recess 2a of the dielectric head portion 2. As a result, as shown in FIG. 1, the adhesive 4 is overfilled around one end of the rod portion 3 and digs into the escape recess 7 a formed at the end portions of the two half portions 7. Therefore, by providing the recess portion 7a for escape of the adhesive in this way, excess adhesive adheres to the jig, enters between the parts of the jig, or between the parts of the tuning bar member 1 assembled with the jig, etc. Inconvenience is avoided.
[0012]
FIG. 3 shows a state in which the tuning rod member 1 prepared in this way is attached to the dielectric resonator 10. The dielectric resonator 10 includes a resonator part 11 and a support base part 12, and the support base part 12 is fixed to the bottom wall of the metal casing 13. The tuning rod member 1 is guided and supported in the hollow hole of the dielectric resonator 10 by a hollow bolt 14 that is locked to a threaded opening in the bottom wall of the metal casing 13, and the screw at the end of the tuning rod member 1. The member 5 is locked to a support member 15 provided on the lower side of the bottom wall of the metal casing 13.
[0013]
By the way, in the illustrated embodiment, two contact surfaces that contact the outer peripheral surface of the bar portion of the tuning bar member are provided on the inner peripheral surface of each of the two half-body portions at intervals in the longitudinal direction. If necessary in relation to the size of the tuning bar member 1, three or more contact surfaces may be provided. Alternatively, the entire portion other than the portion provided with the adhesive escape recess at the end of the inner peripheral surface of each of the two half-body portions can be configured as the contact surface.
[0014]
Further, in the illustrated embodiment, instead of providing the adhesive escape recesses at both ends of the inner peripheral surface of each of the two half parts, an adhesive escape recess can be provided only at one end portion of the inner peripheral surface.
【The invention's effect】
As described above, in the jig for assembling the tuning rod member of the dielectric resonator according to the present invention, the inside of the cylindrical outer tube member having the inner peripheral surface that slidably receives the head portion of the tuning rod member. Tuned to the head part of the tuning bar member on at least one end of each of the two detachable half parts that are combined with each other to form an inner cylindrical member for alignment guide to the tuning bar member By providing an adhesive relief recess that joins one end of the bar part of the bar member, excess adhesive may adhere to the jig or be assembled with the jig even if the adhesive sticks out when the tuning bar member is assembled. As a result, there is no fear of entering the portion of the tuning bar member 1 to be assembled, and the assembling operation can be performed reliably and easily.
In addition, when each of the two half parts is formed to have a symmetrical cross-sectional shape from the center to the tip, it becomes possible to work without worrying about the direction of these half parts when using the jig, This contributes to easy assembly of the tuning bar member.
Further, in the case where at least two abutment surfaces that abut on the outer circumferential surface of the bar portion of the tuning bar member are provided on the inner circumferential surface of each of the two half-body parts in the longitudinal direction, the tuning bar member This makes it possible to perform centering guidance with respect to the rod portion reliably and accurately.
[Brief description of the drawings]
FIG. 1 is a schematic longitudinal sectional view showing a jig for assembling a tuning rod member of a dielectric resonator according to the present invention.
2 is an end view of two halves of the device in the jig of FIG.
3 is a schematic cross-sectional view showing a state where a tuning rod member assembled using the jig of FIG. 1 is mounted on a dielectric resonator.
[Explanation of symbols]
6: Cylindrical outer cylinder member 7: Two separable half portions 7a constituting the inner cylinder member 7: Adhesive escape recess 7b: Contact surface 8: Lid member

Claims (4)

It is combined with a dielectric resonator having a resonator portion and a support base portion, and is formed by bonding a dielectric head portion and a rod portion that adjust resonance frequency characteristics by cooperating with the resonator portion of the dielectric resonator. In the assembly tool for the tuning rod member,
A cylindrical outer cylinder member having an inner peripheral surface that slidably receives the head portion of the tuning bar member, and a guide for aligning the tuning bar member in combination with each other and being inserted into the outer cylinder member And two halves with an adhesive relief recess for joining one end of the bar portion of the tuning rod member to the head portion of the tuning rod member. A jig for assembling a tuning rod member of a dielectric resonator, wherein the jig is provided at at least one end of each portion. 2. The dielectric resonance according to claim 1, further comprising a lid member that is fitted to the inner peripheral surface of the cylindrical outer cylinder member and has one end engaged with the other end of the tuning rod member. Jig for assembly of the tuning rod member of the vessel. 2. The jig for assembling a tuning bar member for a dielectric resonator according to claim 1, wherein each of the two half parts is formed to have a symmetrical cross-sectional shape from the center to the tip. 2. At least two abutting surfaces that abut on the outer peripheral surface of the bar portion of the tuning bar member are provided at intervals in the longitudinal direction on the inner peripheral surface of each of the two half-body portions. A jig for assembling the tuning rod member of the dielectric resonator according to claim 1.

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