JP2001060472A - Press-fit structure and connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press-fit structure allowing easy press-fitting of a pin into a press-fit hole at a proper position and a connector equipped with such a press-fit hole. SOLUTION: In this press-fit structure, when housing components 30, 31 are brought close to each other with a first pin 65 positioned at the opening of a first press-fit hole 67, an end portion of the first pin 65 enters a guide hole part 72 of the first press-fit hole 67 without receiving much press-in resistance. As the first pin 65 advances to the deeper side of the guide hole part 72, the first pin 65 is regulated in inclination and centered, and the end of the first pin 65 hits against a plurality of ridges 70 provided in a press-fit part 71. When the housing components 30, 31 are firmly thrusted against each other, the first pin 65 uniformly crushes the plurality of ridges 70 and is held in a proper position in the first press-fit hole 67.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press-fitting structure for inserting and fixing a pin, and a connector having such a press-fitting hole.

[0002]

2. Description of the Related Art In recent years, with the diversification of connectors, connectors formed by connecting a pair of housing members have been developed. Then, as a structure for aligning and connecting these housing components, for example, a pin is protruded from one of the housing components, and a press-fitting hole is formed in the other housing component. The structure of matching is being studied.

[0003]

However, since the diameter of the above-mentioned pin and press-fitting hole cannot be increased due to a demand for downsizing the connector, if the press-fitting resistance is set to be large, for example, the pin may break. Can occur.
For this reason, as shown in FIG. 12, it is considered preferable to employ a structure in which a plurality of protruding ridges 5 which are easily deformed are formed on the peripheral surface of the press-fit hole 3.

However, when this structure is adopted, the pins 4
When the pin 4 is pushed as it is to a position deviated from the axis (regular position) of the press-fitting hole 3, as shown in FIG. , The press-fit hole 3 is held at an irregular position, and as a result, the housing components 1 and 2 (see FIG. 12) are coupled in a state of being displaced. Therefore, when assembling the two housing components 1 and 2, it is difficult to simultaneously perform the operation of positioning the pin 4 at the proper position of the press-fitting hole 3 and the operation of pushing it in with a strong force. The efficiency becomes very poor.

The present invention has been made in view of the above circumstances, and has as its object to provide a press-fitting structure capable of easily press-fitting a pin into a proper position of a press-fitting hole, and a connector provided with such a press-fitting hole. I do.

[0006]

According to a first aspect of the present invention, there is provided a press-fitting structure in which a pin protruding from one of a pair of members assembled to each other is punched in the other member. A press-fitting structure to be inserted into the press-fitting hole provided, and a plurality of ridges are formed to protrude from the inner peripheral surface on the inner side of the press-fitting hole in the pin insertion direction so that the ridges are crushed by the pins. A press-in hole portion was provided, and a guide hole portion formed in a cylindrical shape and guiding the pin to a regular position of the press-in hole portion was provided on the front side of the press-in hole in the pin insertion direction from the press-in hole portion. However, it has features.

According to a second aspect of the present invention, there is provided a connector in which a pair of housing components are connected to each other, wherein a pin is projected from one housing component toward the other housing component, and the other housing component is provided. The structure is characterized in that the press-fit hole according to claim 1 is provided.

According to a third aspect of the present invention, there is provided a connector in which a metal housing component and a synthetic resin housing component are connected to each other. A metal pin is protruded toward the housing structure, and the synthetic resin housing structure is provided with the press-fit hole according to claim 1.

[0009]

According to the first to third aspects of the present invention, in order to press-fit a pin into a press-fitting hole, first, the pin is positioned at the opening of the press-fitting hole and the members are mutually connected. Get closer. Then, the tip portion of the pin enters the guide hole portion of the press-fitting hole without receiving much press-fitting resistance. Then, as the pin advances to the far side of the guide hole, the inclination of the pin is regulated and centered on the cylindrical inner peripheral surface of the guide hole, and the tip of the pin is provided in the press-fit hole. Hit multiple ridges. In this state, if the members are pressed strongly against each other, the pin protrudes into the deep portion of the press-fitting hole while the base end side is centered in the guide hole, and the plurality of ridges are evenly crushed and press-fitted. It is held in the proper position of the hole.

Thus, according to the present invention, the pin can be press-fitted into the proper position of the press-fitting hole. In addition, in the present invention, by providing a guide hole portion in front of the press-fitting hole portion of the press-fitting hole, the work of aligning the pin to the proper position of the press-fitting hole and the work of pushing with a strong force are separated.
Conventionally, the work becomes easier as compared with the case where they are performed simultaneously. Thereby, in a connector formed by connecting a pair of housing components (the invention of claim 2), or in a connector in which one of the housing components is made of metal (the invention of claim 3), these housing components are accurately formed. It can be easily assembled in a state where it is aligned.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment in which the present invention is applied to a shielded connector will be described below with reference to FIGS. This shield connector is of a type that is attached to a shield wall 60 provided in an electric device, and is formed by assembling a first housing component 30 and a second housing component 31, as shown in FIG.

The first housing structure 30 is entirely shown in FIG.
And a pair of cylindrical portions 33, 33 extending in parallel from one end surface of a base portion 32, which is made of insulating resin, has an oval cross section, and is flat in the axial direction. . Then, cavities 35, 35 are formed through each of the cylindrical portions 33, 33 and the base 32, and male terminal fittings 36 are formed therein.
Are respectively accommodated (see FIG. 1).

On the other hand, the entire second housing structure 31 is shown on the upper right side of FIG. 2, is made of aluminum die-cast, has conductivity, and has the following structure. That is, at one end of a main part 51 having an oval cross section, an aluminum flange 52 having a horizontally long rectangular shape is provided at one end of the main part 51, and a concave part 52 </ b> A which is depressed from the aluminum flange 52 to an intermediate part in the axial direction of the main part 51. Is provided. The first housing component 30 is located in the recess 52A.
(See FIG. 1).

The main body 51 includes the cavities 35, 35.
Are formed in the front-rear direction, and one end thereof is open to the inner surface of the recess 52A. As shown in FIG. 1, the tab 38 provided on the male terminal fitting 36 protrudes from the front surface of the base 32 into the communication hole 53, whereby the peripheral wall of the communication hole 53 constitutes a hood portion 54 for waiting for the mating connector. ing.

A ridge 56 is formed at an intermediate portion of the inner peripheral surface of the hood portion 54 so as to protrude inward. A contact 55 is incorporated between the ridge 56 and the first housing structure 30. I have. The contact 55 has a structure in which an intermediate portion of a cylindrical metal plate is divided into a plurality of bands and bulged inward.

A lock projection 58 for engaging with a lock arm provided on a mating connector (not shown) is provided on the upper surface of the main body 51 facing upward in FIG.

As shown in FIG. 2, the aluminum flange 52 has four bolt holes 59 formed at four corners thereof. Then, the aluminum flange 52 is brought into contact with the peripheral edge of the connector mounting hole 61 formed in the shield wall 60, and a bolt (not shown) is passed through the bolt hole 59, and is screwed to the shield wall 60. Is done.

The shield wall 60 of the aluminum flange 52
An annular groove 62 is formed in the abutting surface 52 </ b> B with its inner edge side depressed on the side away from the shield wall 60. Then, on the inner edge side of the inner wall of the annular groove 62,
Resin flange 3 provided on first housing component 30
4 are abutted, and a packing 63 is laid outside the resin flange 34. Packing 63 in FIG.
Locking pieces 64, 64 project from the inner peripheral surfaces of the upper and lower portions so as to approach each other.
As shown in (1), the packing 63 is prevented from falling off between the resin flange 34 and the inner wall of the annular groove 62.

As shown in FIG. 6, the first and second housing members 30 and 31 have first and second pins 65 and 66 protruding from the second housing member 31, respectively.
Is press-fitted into first and second press-fit holes 67 and 68 formed in the first housing 30 to be positioned and prevented from coming off.

More specifically, both pins 65 and 66 are
As shown in (2), one end face of the second housing component 31 facing the first housing component 30 is arranged side by side on the center line in the width direction. And the first pin 65
The recess 52A protrudes from an upper position (an upper position in FIG. 2) of the inner surface.

A protruding portion 69 is formed below the first pin 65 of the recess 52A so that the inner surface of the recess 52A is raised to a position flush with the inner surface of the annular groove 62. The second pin 66 protrudes from the protrusion 69, and both pins 6
As shown in FIG. 6, the distal end surfaces of 5, 66 are flush with each other. Therefore, the first pins 65 are longer than the second pins 66. The edges of the tips of the pins 65 and 66 are chamfered in a tapered shape (see FIGS. 7 and 9).

As shown in FIGS. 7 and 8, a plurality of ridges 70 project from the inner peripheral surface of the first press-fitting hole 67 into which the long first pin 65 is inserted, as shown in FIGS. The formed press-fit hole 71 is provided, and a cylindrical guide hole 72 is formed on the near side of the press-fit hole 71 in the pin insertion direction. The inner diameter of the guide hole 72 is formed slightly wider than the outer diameter of the first pin 65. The inner diameter of the base hole 75 at the rising portion of the ridge 70 in the press-fitting hole portion 71 is as shown in FIG.
As shown in FIG. 7, the inner diameter of the guide hole 72 is slightly larger than that of the guide hole 72, so that the ridge 70 can be easily crushed until the protrusion 70 is almost at the same height as the guide hole 72. In addition, the second where the short second pin 66 is inserted
Although not shown, the entire press-in hole 68 has the same structure as the press-in hole 71 in the entire axial direction, and includes a plurality of protrusions. Although only four ridges 70 are shown in FIGS. 8 and 9, actually, for example, twelve ridges are formed.

Next, the operation of the present embodiment will be described. To install a shielded connector, for example,
The recesses 52A of the housing structure 31 are directed upward, the contacts 55, 55 are accommodated in the respective communication holes 53, 53 which are opened on the inner side of the recesses 52A, and the annular grooves 62 on the peripheral edge of the recesses 52A are packed. 63 is laid.

Next, the base 32 of the first housing component 30 is addressed to the recess 52A, and the pins 32, 66 and the press-fit holes 67, 68 face each other. Get closer. Then, first, the first pin 6
5 approaches the first press-in hole 67, where a guide hole 72 is provided on the entrance side of the first press-in hole 67, and the inner diameter of the guide hole 72 is the outer diameter of the first pin 65. Since the first pin 65 and the first press-fit hole 67 are formed slightly wider,
As a result, the first pin 65 can be smoothly inserted into the first press-fit hole 67 without receiving much press-fit resistance.

Then, as the first pin 65 advances to the inner side of the guide hole 72, the inclination of the first pin 65 is regulated and centered on the cylindrical inner peripheral surface of the guide hole 72. hand,
The tip of the first pin 65 abuts against a plurality of ridges 70 provided in the press-fit hole 71. At this time, the tip of the second pin 66 just reaches the entrance of the second press-fitting hole 68. Also,
At this time, even if the second pin 66 is slightly displaced from the position of the second press-fitting hole 68, the position is easily adjusted to the normal position only by displacing the two housing components 30 and 31 about the first pin 65. be able to.

In this state, the two housing components 30, 3
Press firmly on 1. Then, the first pin 65 protrudes into the deep portion of the press-in hole 71 while being guided by the guide hole 72 on the base end side, and evenly crushes the plurality of ridges 70 to enter the press-in hole 71. (See FIG. 9). Also, the second pin 66
Also, by the guide between the first pin 65 and the guide hole 72, the plurality of ridges are evenly crushed and entered into the second press-fit hole 67 without being inclined. Then, when the distal end surface of the base portion 32 abuts against the inner surface of the recess 52A, each pin 65,
66 is held at the proper position of each of the press-fit holes 67 and 68 (see FIG. 10), and the assembly of the first housing component 30 and the second housing component 31 is completed.

As described above, according to the present embodiment, the pins 65 and 66 can be press-fitted into the regular positions of the press-fit holes 67 and 68, so that the two housing components 30, 31 are assembled in a state where they are accurately aligned. be able to. Moreover,
In the present embodiment, by providing the guide hole 72 before the press-fit hole 71 of the first press-fit hole 67, the operation of positioning the pin at the normal position of the press-fit hole and the work of pushing the pin with a strong force are described. , The work becomes easier than in the past, when they were performed simultaneously.

In this shield connector, an aluminum flange 52 is abutted against a peripheral portion of a connector mounting hole 61 formed in a shield wall 60 and is screwed. At this time, the packing 63 can be easily attached because a part (locking piece 64) of the packing 63 is not dropped between the resin flange 34 and the inner wall of the annular groove 62. Further, the aluminum flange 52 is pressed against the shield wall 60 to be electrically connected, and the hood portion 54 functions as a shield shell.

<Other Embodiments> The present invention is not limited to the embodiment described above with reference to the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition, various changes can be made without departing from the scope of the invention. (1) In the above embodiment, a pair of pins 65 and 66 are provided, and the press-fit structure according to the present invention is applied to only one of the press-fit holes 67 and 68 into which the pins 65 and 66 are inserted. The present invention may be applied to both the press-fit holes.

(2) The number of pins and press-fit holes is not limited to two as in the above-described embodiment. For example, as shown in FIG. Four press-fitting holes 74 into which these are press-fitted are provided in the other member, and all of the press-fitting holes 74 are connected to the press-fitting hole and the guide hole in the same manner as the first press-fitting hole 67 of the first embodiment. It may be provided with a structure (see FIG. 8).

(3) In the above-described embodiment, the present invention is applied to the press-fitting holes for connecting the metal member (the second housing member 31) and the synthetic resin member (the first housing member 30). Although the application is shown, for example, the present invention may be applied to a press-fit hole for connecting metal members or synthetic resin members.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a shielded connector according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the same shield connector.

FIG. 3 is a front view of the same shield connector.

FIG. 4 is a rear view of the same shield connector.

FIG. 5 is a side sectional view taken along the line AA in FIG. 3;

FIG. 6 is a side sectional view taken along the line BB of FIG. 3;

FIG. 7 is a perspective view showing a state before a pin is inserted into a press-fitting hole.

FIG. 8 is a side sectional view of a press-fit hole.

FIG. 9 is a side sectional view showing a state in which the tip of a pin has entered a press-fit hole portion of the press-fit hole.

FIG. 10 is a cross-sectional view showing a state in which a pin is pressed into a normal position of a press-fitting hole.

FIG. 11 is an exploded perspective view showing a connector according to a modified example.

FIG. 12 is a perspective view of a conventional pin and a press-fit hole.

FIG. 13 is a cross-sectional view showing a state where these pins are press-fitted while being deviated from regular positions of the press-fit holes.

[Explanation of symbols]

 Reference Signs List 30 first housing component 31 second housing component 65 first pin 66 second pin 67 first press-fit hole 68 second press-fit hole 70 ridge 71 press-fit hole 72 guide hole 73 ... Pin

Claims (3)

[Claims] 1. A press-fitting structure for inserting a pin protruding from one of a pair of members assembled to each other into a press-fitting hole formed in the other member. On the back side, a plurality of protrusions are formed so as to protrude from the inner peripheral surface, and press-fit holes are provided so that these protrusions are crushed by the pins. Pins are inserted from the press-fit holes of the press-fit holes. A press-fitting structure, comprising a guide hole formed in a cylindrical shape on a front side in the direction and guiding the pin at a regular position of the press-fitting hole. 2. A connector comprising a pair of housing components, wherein a pin projects from one housing component toward the other housing component, and the other housing component includes the pin. A connector provided with the press-fit hole according to claim 1. 3. A connector in which a metal housing component and a synthetic resin housing component are connected to each other, wherein the metal housing component is made of metal and is directed toward the synthetic resin housing component. 2. The connector according to claim 1, wherein the pin is protruded, and the press-fit hole according to claim 1 is provided in the synthetic resin housing structure.