JPH051104Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an improvement in the case of an oscillator used for modulating television signals.

[Prior Art] Conventionally, cases for this type of oscillator have been made by bending a metal plate, as shown in FIG. Variable capacitor (hereinafter referred to as "varicon")
A storage case 2 (also referred to as a storage case 2) is integrated by soldering as shown in FIG. H is the soldered part. Regarding the printed circuit board storage case 1 side, the printed circuit board is held horizontally at the bottom of the case 1, and a shield plate is provided below to secure it to the main board, and the variable capacitor storage case 2
As for the side, the rotor 4 of the variable capacitor is inserted into the interior through the side opening 3 and is fixed to the main board in this state.

[Problems to be solved by the invention] By the way, since the conventional oscillator case is made by integrating separate cases by soldering,
There were problems in that there were a large number of parts and the soldering process was time-consuming.

[Means for Solving the Problems] The present invention was provided in order to solve the above problems, and includes a storage part for a printed circuit board that constitutes an oscillation circuit and a storage part for a variable capacitor connected to the printed circuit board. are placed adjacent to each other, and the printed circuit board storage portion has an opening for inserting the printed circuit board on the top surface, and a groove on the bottom surface for allowing the terminal portion of the printed circuit board to protrude outward from the bottom surface. The variable capacitor storage section is provided with an insertion opening for the variable capacitor on the side opposite to the side in contact with the printed circuit board storage section, and the printed circuit board storage section and the variable capacitor storage section are connected to each other by a single metal plate. It is characterized by being bent and formed into one piece.

[Operation] To insert a printed circuit board into the case of the present invention, insert it through the opening on the top surface of the printed circuit board storage section. Then, the terminal portion of the printed circuit board is made to protrude outside from the groove in the bottom surface. Also, the stator and rotor of the variable capacitor are installed at once through the variable capacitor insertion port.

[Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3.

In FIG. 1, 10 is a case and 11 is a lid. The case 10 has, adjacent to each other, a storage section 10A that stores a printed circuit board P that constitutes a transmitting circuit, and a storage section 10B that stores a variable capacitor (not shown) connected to the printed circuit board P. In the printed circuit board storage section 10A,
An opening 13 for inserting a printed circuit board is formed on the top surface, and a groove 14 (see FIG. 3) for allowing the terminal portion of the printed circuit board to protrude outward is provided on the bottom surface.

Further, the variable capacitor storage section 10B is provided with a variable capacitor insertion opening 15 on the side opposite to the side in contact with the printed circuit board storage section 10A. The case 10 is formed into a substantially rectangular box shape as a whole by cutting a single metal plate into an appropriate shape and bending it at necessary locations.

The details will be explained with reference to Fig. 3.The left and right side plates 2 forming the rectangular box-shaped case
0 and 21 are connected to the left and right sides of the rear side plate 22, and are bent toward the front at bending lines L1 and L2. Further, the bottom plate 23 is connected to the rear side plate 22, and the folding line L
3 and is bent toward the front. The lower edges of the left and right side plates 20, 21 and the left and right edges of the bottom plate 23 are in contact with each other without any gaps, and the fixing pieces 24, 24 formed on the left and right edges of the bottom plate 23 are attached to the left and right side plates 20, 24.
21, the left and right side plates 20, 21
and the bottom plate 23 are fixed to each other.

Further, the front portions of the left and right side plates 20 and 21 are formed narrowly, and a top plate 25 and a bottom plate 26 constituting the variable capacitor storage portion 10B are connected to the upper and lower edges of the narrow portion of the left side plate 20. and these are the bending lines L
4. It is bent toward the right side plate 21 at L5. The top plate 25 and the bottom plate 26 are connected to the right side plate 21 by engaging the engagement pieces 27 formed at the tips thereof into the engagement holes 28 formed in the right side plate 21.
is fixed. As described above, the variable capacitor storage section 10B and the printed circuit board storage section 10A are divided. In addition, the variable capacitor storage section 10
In the center of the top plate 25 of B, a U-shaped notch 29 is formed from the front end to allow the upper end of the rotor to protrude.

In addition, the bottom plate 26 of the variable capacitor storage section 10B and the printed circuit board storage section 10 divided in this way are
The bottom plates 23 of A have different heights, so the front end of the bottom plate 23 is curved upward and is in contact with the lower surface of the bottom plate 26 of the variable capacitor housing 10B. The contact portion between the two is fixed by caulking, and a continuous bottom surface is formed from the bottom plate 23 to the bottom plate 26.

Note that the above-mentioned groove 14 is opened in the center of the bottom plate 23 of the printed circuit board storage section 10A to allow the terminal section of the printed circuit board to protrude to the outside, and the terminal section can be connected to the main board (not shown). It's becoming like that. Further, leg portions 30 for fixing the case 10 to the main board are provided at the center portions of the left and right side plates 20 and 21 in the longitudinal direction. Furthermore, an engagement groove 31 for engaging the upper part of the printed circuit board P is formed at the upper edge of the rear side plate 22.

In addition, the structure of the portion K that is crimped and fixed as described above is the second
As shown in the figure, a tapered hole 32 is formed in one plate, and the material of the other plate is crushed and bitten into the tapered hole 32, thereby fixing the two plates.

To assemble a case with such a configuration, the metal plates are simply bent, some parts are crimped and fixed, and some parts are simply inserted with engaging pieces, and the assembly is completed. Therefore, no soldering is required at all. Further, since this case 10 has many bent parts and few cutaway parts, there are few gaps and excellent shielding properties. Furthermore, since the bottom plate 23 is integrally provided, there is no need to provide a separate shield plate at the bottom.

To insert the printed circuit board P into the case 10 configured as described above, insert it vertically through the opening 13 on the top surface of the printed circuit board storage section 10A, and insert the upper part of the printed circuit board P into the engagement groove 31 of the rear side plate 22 of the case 10. engage. Then, the terminal portion of the printed circuit board P is made to protrude from the groove 14 of the bottom plate 23 to the outside. In addition, to incorporate a variable capacitor, insert the stator and rotor of the variable capacitor into the variable capacitor insertion slot 1.
Insert and incorporate from step 5 all at once. Then, the leg portions 30 of this case 10 are inserted into the main board, and the terminal portions of the printed circuit board P are connected to the circuits of the main board. The above completes the attachment to the main board.

[Effects of the invention] According to the invention, the printed circuit board storage part and the variable capacitor storage part are integrally formed by bending a single metal plate, which reduces the number of parts and reduces the cost of parts. There is no need to solder the storage parts together, making manufacturing easier. Furthermore, since no soldering is involved, secondary defects due to soldering are reduced.

[Brief explanation of drawings]

Figures 1 to 3 show one embodiment of the present invention. Figure 1 is a perspective view of the case and lid, Figure 2 is a sectional view of the part shown in Figure 1, and Figure 3 is an exploded view of the case. figure,
Figures 4 to 6 are diagrams for explaining conventional cases, with Figure 4 being an exploded view of the case for storing printed circuit boards, Figure 5 being an exploded view of the case for storing variable capacitors, and Figure 6. is a diagram of an oscillator case in which both cases are integrated. P...Printed circuit board, 10...Case, 10A
... Printed circuit board storage section, 10B ... Variable capacitor storage section, 13 ... Opening, 14 ... Groove, 15
...Insertion port.

Claims (1)

[Scope of utility model registration request] A housing portion for a printed circuit board constituting a transmitter circuit and a housing portion for a variable capacitor connected to the printed circuit board are arranged adjacent to each other, and an opening for inserting the printed circuit board is formed in the upper surface of the housing portion for the printed circuit board. In addition, a groove is provided on the bottom surface for causing the terminal portion of the printed circuit board to protrude outward from the bottom surface, and the variable capacitor storage section is provided with a groove on the side opposite to the side in contact with the storage section of the printed circuit board. An oscillator case characterized in that the printed circuit board storage section and the variable capacitor storage section are integrally formed by bending a single metal plate.