JP2568394Y2 - Package holding structure for cylindrical screwless housing - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a package of an electronic circuit, for example, in a tubular unscrewed housing which is formed of a plastic molded body as a housing of a transmission device for outdoor installation and which can be assembled without screwing. The present invention relates to a package holding structure of a cylindrical screwless housing for mounting the same.

[0002]

2. Description of the Related Art FIG. 3 is a perspective explanatory view showing the appearance of a housing of a conventional transmission apparatus for outdoor installation, for example. FIG. 4 is a sectional view taken along a longitudinal center line showing the internal structure of FIG. FIG. 5 is an exploded perspective view of each component constituting the apparatus shown in FIG. 3, and FIG. 2 is a detailed explanatory view of a package guide section on the top surface of the case shown in each of the drawings. 2 is a sectional view taken along the line BB.

In each of the above drawings, reference numeral 1 denotes a cylindrical case of a housing formed by molding a thermoplastic material such as plastic, and one end on the side where the package 4 is inserted is open. The other end on the side where the front end of 4 is in contact is closed to form the top surface 1c. The package 4 is formed of, for example, a printed wiring board in which an electronic circuit (not shown) constituting the transmission device is incorporated. The terminal block 2 is formed by simultaneously molding a plurality of external line connection terminals 2a formed in a hook shape.
Take out. Then, the package connection terminals 2b are soldered to the package 4, and the terminal block 2 is fixed to the package 4, so that electrical connection is performed. After the assembly, the external line 5 is connected to the external line connection terminal 2a (FIG. 3).

The terminal block 2 has an external line connection terminal 2a on the front.
A terminal cover 3 having a U-shape having a terminal hole 3a into which is inserted is mounted and fixed with an adhesive or the like (FIG. 4). The terminal cover 3 is provided with a stopper hook 3b directed inward, and a stopper hole 1d provided in a side plate of the case 1.
It is fixed by a snap fit which engages with. In other words, this housing is a cylindrical screwless housing that can be assembled without screws and without screws. However, as shown in FIG. 4, the outdoor grounding point is fixed to the wall 6 with a fixing screw 7 via a fixing hole 1a in the top surface 1c, but the housing itself is assembled without screws. System.

As described above, the terminal block 2 and the terminal cover 3
The package 4 integrally formed with the package 1 is inserted into the case 1 and fitted into concave guides 1b provided near both side surfaces inside the top surface 1c, and is fixed in the case 1 by the above-described snap method. The package 4 is provided with a fixing hole escape portion 4a for escaping the fixing hole 1a of the case 1. As described above with reference to FIG. 4 in particular, this housing is provided with mounting screws 7 provided on the top surface 1c.
And is connected to an external electronic circuit (not shown) by the external wire 5 soldered to the external line connection terminal 2a, and is used as a transmission device for outdoor installation.

[0006]

In the conventional package holding structure of a cylindrical screwless housing as described above, the mounting tolerance due to the manufacturing tolerance of the package length, the manufacturing tolerance of the case and the terminal cover, and the assembly tolerance of these, etc. Since the package is not firmly fixed, rattling occurs, and the reliability of the product itself and the reliability of external line connection are insufficient.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. Even when the above-mentioned manufacturing or assembling tolerance is unavoidable, there is no backlash in the package housing, and the external line connection is improved. An object of the present invention is to provide an excellent package holding structure for a cylindrical screwless housing.

[0008]

According to the present invention, there is provided a package holding structure for a cylindrical screwless housing, which is vertically mounted on a terminal cover from one end of a plastic cylindrical case having one end opened and the other end closed. Electronic circuit package inserted,
A package holding structure for a screwless assembly type housing formed so that a stopper hook provided on a terminal cover is snap-fitted and locked in a stopper hole provided on a side surface of a cylindrical body, and the other end is closed. A convex semi-circular guide is provided at the center of the inner surface of the case top surface formed by the surface to abut and engage with the concave semi-circular guide provided at the end of the package edge. It has ribs.

[0009]

According to the present invention, a semicircle is provided at the center of the inside of the top surface of the case of a cylindrical screwless housing of an outdoor transmission device or the like to abut on a guide provided at the tip of a package inserted from the other end. A semi-circular guide having a size to engage with the guide is provided, and a rib for tolerance absorption is provided at the center contact portion of the guide, so that the rib is easily plastically deformed. When the package is pushed in, a part between the two guides can be easily embedded without any gap by the deformed rib. In other words, even if there is a gap between the guides due to tolerance at the time of contact, the rib is crushed because the gap is smaller than the size of the rib, and the two guides are crimped through the crushed rib material, and the rattling due to tolerance is caused. (Tolerance absorption used in the present specification,
It refers to such an effect). Therefore, there is no rattling between the package and the housing when the package is mounted.

[0010]

FIG. 1 is a sectional view showing a package holding structure according to an embodiment of the present invention.
It is -A sectional drawing. The other components in FIG.
Except for a, 1b, 4 and 4a, the configuration is the same as that of the conventional example shown in FIGS. 3, 4 and 5. That is, the configuration of the embodiment of the present invention is the same as the conventional configuration of FIGS. 2 to 5 except that only the case 1, the package 4, and the related parts except 1c and 1d are changed. Therefore, in the present embodiment, since the reference numerals other than the above-mentioned reference numerals correspond to the same reference numerals as those used in the drawings of the conventional example, the description thereof will be omitted.

In FIG. 1, a semi-circular guide 11a is protruded at the center of the top surface 11c of the case 11 inside, and a rib 11b for tolerance absorption is provided at the tip of the guide 11a. It is desirable that the tolerance absorbing rib 11b be made of a material that is easily plastically deformed. In the case of, plastic deformation is generally easy because the rib itself is small, so that the same member as the case 11 may be used. On the other hand, the case 1
A semicircular guide 1 that engages with a guide 11a provided on one side
4a is recessed.

In the above configuration, when the package 14 is inserted in the same manner as in the conventional method, the tolerance absorbing rib 11b abuts on the guide 14a before the guide 11a and the guide 14a come into contact with each other. The absorbing rib 11b is crushed, and the gap created by the tolerance between the guide 11a and the guide 14a is buried even if it is a part thereof. Due to this embedding, the package 14 and the housing are crimped with a certain degree of strength. Therefore, after snap-fitting with the stopper hooks 3b and the stopper holes 1d as described with reference to FIG. To firmly fix both. For this reason, a cylindrical screwless housing having excellent external line connectivity can be effectively obtained.

[0013]

As described above, according to the present invention, the half of the cylindrical screwless housing which is in contact with the guide provided at the front end of the package inserted from the other end at the center inside the top surface of the case. A semi-circular guide having a size that engages with the circular guide is provided, and a rib for absorbing tolerance is provided at the center contact portion of the guide. Therefore, when the package is pushed in and mounted, the above two guides are provided. The gap is easily filled with no gap by the deformed rib. That is, even if there is the gap between the guides due to the tolerance at the time of abutment, the ribs are crushed to absorb the rattle due to the tolerance, and the rattle between the housing and the package is eliminated when the package is mounted. As a result, a cylindrical screwless housing having excellent external line connectivity such as an outdoor transmission device is reliably achieved.

[Brief description of the drawings]

FIG. 1 is a sectional view illustrating a package holding structure according to an embodiment of the present invention;

FIG. 2 is a detailed explanatory view of a conventional package guide portion on a top surface of a case.

FIG. 3 is a perspective explanatory view showing the appearance of a housing of a conventional transmission device for outdoor installation.

FIG. 4 is a sectional view taken along a longitudinal center line showing an internal configuration of FIG. 3 and an explanatory view showing a state of outdoor installation.

FIG. 5 is an exploded perspective view of each component constituting the apparatus of FIG. 3;

[Explanation of symbols]

 1, 11 Case 1a Fixing hole 1b Guide 1c, 11c Top surface 1d Stopper hole 2 Terminal block 2a External terminal 2b Package connecting terminal 3 Terminal cover 3a Terminal hole 3b Hook for stopper 4, 14 Package 4a Hole for fixing hole relief Reference Signs List 5 outer wire 6 wall 7 mounting screw 11a guide 11b tolerance absorption rib 14a guide

Claims (1)

(57) [Scope of request for utility model registration] 1. An electronic circuit package vertically mounted on a terminal cover is inserted from one end of a plastic cylindrical case having one end opened and the other end closed, and a stopper hook provided on the terminal cover is inserted. A package holding structure for a screwless assembly type housing formed so as to be snap-fitted and locked in a stopper hole provided on a side surface of the cylindrical body, and a case top surface formed with a closed surface at the other end. A convex semi-circular guide which abuts and engages a concave semi-circular guide provided at the end of the edge of the package at the center of the inside of the package, and has a rib which is easily plastically deformable for absorbing tolerance at the end thereof. The package holding structure of a cylindrical screwless housing.