JPS6244556Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to electronic components such as ultrasonic delay lines used in consumer equipment and industrial equipment.

Configuration of Conventional Example and Its Problems Recently, miniaturization of electronic components such as ultrasonic delay lines that have been used in the past has become extremely important due to miniaturization of equipment. Furthermore, due to improvements in mounting technology and increased mounting density on printed circuit boards, flux penetration performance has also been significantly improved to improve soldering performance and stability when attached to printed circuit boards. As a result, problems such as flux entering the interior of electronic components during soldering and changing performance are occurring frequently. As a countermeasure to this problem, a method of sealing the terminal portion with resin has been adopted in order to improve the degree of sealing of the terminal portion.

FIG. 1 shows such a conventional example, where 1 is an upper case and 2 is a lower case, and these upper and lower cases 1 and 2 are joined by ultrasonic welding or the like. 3
is a terminal provided, for example, on the outer periphery of the lower case 2, and a lead wire (not shown) that communicates with a functional part such as an ultrasonic delay line housed in the case is connected to this terminal 3.
It is connected to the. 4 is a sealing resin that seals the terminal 3 portion.

However, with this configuration, the surface tension of the resin causes the resin to bleed onto the base of the terminal case, making it difficult to lift the base of the terminal case from the printed circuit board when the terminal is mounted upright on the printed circuit board. This resulted in a disadvantage that the overall height of the product was increased. In addition, if this is to be avoided, precision in the amount and position of the resin to be applied is required, which reduces workability and is disadvantageous in terms of cost.

Purpose of the invention The present invention was devised to eliminate the above-mentioned drawbacks of the conventional technology, and its purpose is to provide electronic components that are advantageous in terms of mass production and price while maintaining miniaturization. It is.

Structure of the invention In order to achieve this object, the electronic component of the invention is housed in a functional part within a box-shaped case, and grooves are provided on the outer periphery of either the upper or lower case that constitutes the case. Alternatively, a lead wire connecting to the above-mentioned functional part is taken out from the hole, and the lead wire is connected to a terminal provided on the outer periphery of the case.
An elastic body such as silicone rubber or resin is applied to the grooves or holes, and the elastic body or resin is applied to the inside of the case when the parts of the upper and lower cases are joined to the grooves or holes. The upper and lower cases are integrated by providing recesses that converge in the upper and lower cases. According to this configuration, even if there is some variation in the amount or application position of the elastic body or resin applied to the groove or hole part due to the recess provided in one case, the elastic body or resin is When the lower case is integrated, the terminals are gradually gathered inside the case, so that the terminal portion can be reliably sealed. Furthermore, since there is no leakage of the elastic body or resin to the terminal portion outside the case, there is no need to make the terminal longer than necessary, and mass productivity can be improved while maintaining miniaturization.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below in Figures 2 to 4.
This will be explained with figures. First, in the figure, reference numeral 5 denotes a lower case having a U-shaped cross section, and an upper case 6 is attached to the opening surface of the lower case by ultrasonic welding or the like to form a box-shaped case. Although not shown, functional units such as an ultrasonic delay line are housed inside this box-shaped case. A groove 5a is provided inside the outer peripheral part of the lower case 5 for taking out a plurality of lead wires 7 that communicate with the functional part,
The lead wire 7 taken out from the groove 5a is connected to a corresponding terminal 8 provided on the outside of the outer periphery of the lower case 5.
are connected to each other. After connecting the lead wire 7 to the terminal 8 as described above, an elastic material 9 such as silicone rubber is applied to the groove 5a, and then the upper case 6 is aligned with the lower case 5 and both of them are connected as described above. The cases 5 and 6 are integrated by ultrasonic welding or the like. Here, the upper case 6 has a recess 6a in a portion that joins with the groove 5a of the lower case 5, so that the applied elastic body 9 gathers inside the case when the two cases 5 and 6 are integrated. is provided. That is, this recess 6a is formed on the side of the wall surface 5b provided with the groove 5a when the elastic body 9 is bonded.
This is to firmly close the groove 5a by pressing the joint surface 6b that comes into contact with the lower case 5.
The structure is such that the deeper you go, the smaller the cross-sectional area becomes.

Note that the grooves 5 of the lower case 5 in the above embodiment
A does not make any difference even if it is a hole. Furthermore, it goes without saying that the shapes of the upper and lower cases 6, 5 are not limited to the shapes shown in the embodiments. Furthermore, resin may be used instead of the elastic body 9.

Effects of the invention The electronic component of the invention is constructed as described above, and the recesses provided in one of the upper and lower cases constituting the box-shaped case are connected to the grooves or grooves provided in the other case. Even if there is some variation in the amount or position of the elastic material or resin applied to the hole, the elastic material or resin will gradually gather inside the case when the upper and lower cases are integrated. This allows the terminal portion to be reliably sealed. Therefore, since no particular precision is required in the work of applying the elastic body or resin, workability is greatly improved. In addition, since the elastic material and resin are collected inside the case, there is no leakage of the elastic material or resin onto the terminals to the outside of the case, and there is no need to make the terminals longer than necessary. This is effective in reducing the size of the device, and together with improving mass productivity, it has a large cost effect.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional electronic component, Fig. 2 is a sectional view showing an embodiment of the electronic component according to the present invention, Fig. 3 is an exploded perspective view of the same, and Fig. 4 is a configuration of the electronic component. FIG. 2 is an enlarged perspective view of a main part of the upper case shown in an upside-down state. 5... lower case, 5a... groove (or hole),
6... Upper case, 6a... Recess, 7... Lead wire, 8... Terminal, 9... Elastic body (or resin).

Claims (1)

[Scope of utility model registration request] A functional part is housed in a box-shaped case, and a lead wire communicating with the functional part is taken out from a groove or a hole provided on the outer periphery of either the upper or lower case constituting the case. The lead wire is connected to a terminal provided on the outer periphery of the case, an elastic material such as silicone rubber or resin is applied to the groove or hole, and the groove or hole of the other of the upper and lower cases is coated with an elastic material such as silicone rubber or resin. An electronic component in which an upper and a lower case are integrated by providing a recess in the part to be joined to the case so that the elastic body or resin is collected inside the case when joined.