JPH04131925U - Mounting structure of feedthrough capacitor - Google Patents

Abstract

(57) [Summary] [Purpose] To securely temporarily fix a feedthrough capacitor even if its diameter is larger than the standard value. [Structure] An opening 23 into which the feedthrough capacitor 1 fits is provided in the frame 21, and the locking part 28 of the shield frame 24 fitted into the frame 21 is engaged with the lower surface of the circuit board 22, thereby forming the capacitor fixing part 25. presses down the feedthrough capacitor 1 and temporarily fixes it. Shield frame 24
An elastic connecting part 29 is provided between the capacitor fixing part 25 and the locking part 28 so as to bypass the locking part 28,
Even if the diameter of feedthrough capacitor 1 is larger than the standard value,
Due to the bending of the elastic connecting portion 29, the locking portion 28 can be reliably engaged with the lower surface of the circuit board 22, and the feedthrough capacitor 1 can be temporarily fixed without any trouble.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is based on a penetrating capacitor installed in the frame of high-frequency equipment such as tuners. The present invention relates to a mounting structure for temporarily fixing a sensor.

0002

[Conventional technology]

Figure 4 shows a feedthrough capacitor 1 used for the output terminal of a tuner, etc., fixed to a frame 2. The circumference of the capacitor insertion hole 3 formed in the frame 2 is shown. A plurality of tongues 4 are provided around the enclosure, and the feedthrough capacitor 1 inserted into the insertion hole 3 is temporarily fixed with the tongues 4. After setting, the feedthrough capacitor 1 is fixed to the frame 2 by means such as solder dipping. Ta.

0003 By the way, recently, as devices have become smaller, the pitch between terminals has become smaller, as shown in the figure. In the mounting structure shown in Figure 5(A), the flange 1a of the feedthrough capacitor 1 interferes. Therefore, temporary fixation cannot be performed.

0004 Therefore, as shown in FIG. 5(B), a part of the feedthrough capacitor 1 is changed to a lead terminal 5. It is considered that the pitch between the terminals can be reduced by further increasing the distance between the terminals.

[0005] The feedthrough corresponding to the case where feedthrough capacitor 1 and lead terminal 5 coexist as described above. As shown in FIGS. 6 to 8, the mounting structure of the capacitor 1 is as follows: An opening 6 into which the feedthrough capacitor 1 fits and a penetration opening for the lead terminal 5 in the rate 2a. A shield frame 8 formed with a portion 7 and disposed on the inner upper part of the frame 2 is provided with a penetrating portion. A capacitor fixing part 9 located at the top of the capacitor 1 and a capacitor fixing part 9 located at both ends of the capacitor fixing part A locking portion 11 that elastically engages with the lower surface side of the circuit board 10 is provided, and the opening of the frame 2 is The feedthrough capacitor 1 is sandwiched between the part 6 and the capacitor fixing part 9 of the shield frame 8. A mounting structure has been proposed in which it is temporarily fixed in place.

[0006]

[Problem that the idea aims to solve]

However, the above mounting structure is based on the opening 6 of the frame 2 and the shield frame. The main body 1b of the feedthrough capacitor 1 is sandwiched between the fixing portions 9 of 8 from above and below and temporarily fixed. Because of the structure, the outer diameter of the main body 1b of the feedthrough capacitor 1 is larger than the standard value. When this occurs, the entire shield frame 8 lifts up, resulting in a situation as shown in Figure 9. Therefore, the amount of engagement of the locking portion 11 with the circuit board 10 is reduced, and the shield frame is There is a problem that the frame 8 comes off. Also, depending on the shape of the locking part 11, the penetration When the outer diameter of the main body 1b of the capacitor 1 varies toward the larger diameter side, the locking portion 11 closes the circuit. There is a problem in that it may not be possible to engage with the substrate 10.

[0007] Therefore, in order to solve the above problems, this idea was developed to solve the problems mentioned above. Even if there are variations in diameter, the shield frame can be securely fixed to the circuit board. This is a method for mounting feedthrough capacitors that allows temporary fixing of feedthrough capacitors without any problems. The purpose is to provide an attached structure.

[0008]

[Means to solve the problem]

In order to solve the above problems, this idea is a capacitor with a shield frame. An elastic connection part is provided between the fixed part and the locking part located at the end of this fixed part, and this connection The structure is such that the connecting portion is detoured to a position where it does not interfere with the locking portion.

[0009]

[Effect]

Insert the feedthrough capacitor into the opening of the frame, and place the shield frame inside the frame. When the locking part is engaged with the bottom surface of the circuit board, the opening of the frame and the seal will be connected. Temporarily fix the feedthrough capacitor by sandwiching it from above and below with the fixing part of the field frame.

0010 If the diameter of the feedthrough capacitor is larger than the standard during temporary fixing. , the fixed part of the shield frame will lift up, but the locking part will not bend due to the elastic connecting part. This allows the shield frame to be securely attached to the circuit board. The feedthrough capacitor can be temporarily fixed by setting the

[0011]

【Example】

Embodiments of this invention will be described below with reference to FIGS. 1 to 3 of the accompanying drawings.

0012 As shown in FIG. 1, a frame 21 formed in a frame shape houses a circuit board 22 inside. , the width at which the capacitor 1 fits into the plate 21a to which the feedthrough capacitor 1 is attached; A deep opening 23 is provided to open at the upper edge.

[0013] 24 is a shield frame made of a metal plate that temporarily fixes the feedthrough capacitor 1; The plate in the frame 21 is formed into a frame shape and is arranged inside the frame 21. A capacitor fixing part 25 that runs along the inside of the capacitor 21a, and a connecting part 26 that connects it. As a result, the fixing portion 25 has an L-shaped cross section, and the lower edge thereof extends outward onto the feedthrough capacitor 1. A concave notch 27 is provided in contact with it. Note that the fixing portion 25 does not necessarily have an L-shaped cross section. It doesn't have to be.

[0014] The connecting portion 26 is formed in the shape of a vertical strip, and the end thereof is fixed to the circuit board 22. The portion 28 is coupled so as to protrude downward, and the end portion of the fixing portion 25 and the connecting portion 26 are connected to each other so as to protrude downward. They are integrally connected by an elastic connecting portion 29.

[0015] The locking portion 28 is located close to the end of the fixed portion 25, and is connected to the locking portion 28. The elastic connecting part 29 that connects the fixed part 25 via the connecting part 26 connects the fixed part 25 and the connecting part 2. It is formed of strips bent at right angles to the plane so as to go inward from each other, and is a strip of metal plates. The plate gives elasticity, and the planar shape detours between the fixing part 25 and the locking part 28. It has become.

[0016] The portion of the elastic connecting portion 29 connected to the connecting portion 26 is between the side edge of the locking portion 28 and the connecting portion 26 . It is bent from a position with an appropriate interval W provided therebetween.

[0017] In this way, when the distance W is provided between the side edge of the locking part 28 and the elastic connecting part 29, the metal When bending the shield frame 24 with a mold, the locking portion 28 is The relief structure of the mold can be simplified and the cost of the mold can be reduced.

[0018] The mounting structure of this invention has the above-mentioned configuration, and the opening 23 of the frame 21 To temporarily fix the feedthrough capacitor 1 inserted into the frame 21, attach a seal to the top inside the frame 21. The shield frame 24 is fitted into the circuit board 22, and the locking portion 28 of the shield frame 24 is inserted into the circuit board 22. The feedthrough capacitor 1 only needs to be engaged with the lower surface of the opening 23 and the fixed part 25. Temporarily fix it by pinching it.

[0019] Figure 2 shows the temporarily fixed state when the main body of the feedthrough capacitor 1 has the standard diameter value. When the locking portion 28 is locked to the lower surface of the circuit board 22, the elastic connecting portion 29 is in a straight state. It remains as it is.

[0020] Figure 3 shows a hypothetical case where the main body of feedthrough capacitor 1 is close to the upper limit larger than the standard diameter. The fixed state is shown, and the fixed part 25 is lifted by the increased diameter. However, as shown in the figure, the elastic connecting portion 29 is deflected by that amount, and the locking portion 28 is securely connected to the circuit. The shield frame can be engaged with the circuit board 22 and thus the shield frame can be engaged with the circuit board 22. The system 24 can be fixed without any trouble, and the feedthrough capacitor 1 can be temporarily fixed securely. In addition Although the shape of the locking portion 28 is formed in a “dog” shape in the drawings of the above embodiment, it is not necessary to Sushi is not limited to this either.

[0021]

[Effect of the idea]

As described above, according to this invention, the through capacitor fitted into the opening of the frame Between the capacitor fixing part of the shield frame that temporarily fixes the capacitor and the part that locks onto the circuit board. Since an elastic connection is provided between them, if the diameter of the feedthrough capacitor is larger than the standard value, Even if the fixed part is lifted, the elastic connecting part bends to keep the locking part against the bottom surface of the circuit board. can be engaged, thus ensuring the fixation of the shield frame to the frame Therefore, the feedthrough capacitor can be temporarily fixed without any problem.

[0022] In addition, the elastic connecting part is provided around the locking part so that it does not interfere with the locking part, so the The structure of the mold for bending the locking part of the frame can be simplified. .

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a mounting structure according to the invention.

FIG. 2 is a front view showing a temporarily fixed state of the feedthrough capacitor according to the invention.

FIG. 3 is a front view showing a temporarily fixed state when the feedthrough capacitor has a diameter larger than the standard diameter.

FIG. 4 is a vertical cross-sectional view showing a conventional mounting structure.

FIG. 5 (A) is an explanatory diagram when the pitches of conventional feedthrough capacitors are made close to each other, and (B) is an explanatory diagram when the feedthrough capacitor and lead terminals coexist.

FIG. 6 is an exploded perspective view showing another example of a conventional mounting structure.

FIG. 7 is a front view showing a state in which a conventional feedthrough capacitor is temporarily fixed.

FIG. 8 is a vertical sectional side view showing a conventional feedthrough capacitor in a temporarily fixed state.

FIG. 9 is a front view showing a temporarily fixed state when the feedthrough capacitor has a large diameter.

[Explanation of symbols]

21 frame 22 Circuit board 23 Opening 24 Shield frame 25 Capacitor fixing part 26 Connection part 28 Locking part 29 Elastic connection part

Claims (1)

[Scope of utility model registration request] 1. A frame-like frame housing a circuit board is provided with an opening into which a feedthrough capacitor fits, a shield frame disposed over the capacitor within the frame is provided with a locking part for the circuit board, and the circuit board is mounted on the circuit board. In a feedthrough capacitor mounting structure in which a feedthrough capacitor in an opening is fixed by a locked shield frame, an elastic connection part is provided between a capacitor fixing part of the shield frame and a locking part located at the end of this fixing part. A mounting structure for a feedthrough capacitor, characterized in that the connecting portion is provided in a detour to a position where it does not interfere with the locking portion.