Device with housing containing contact pin tightly connected to it

FIELD: radio engineering.

SUBSTANCE: device with housing (1), in which there installed is at least one contact pin (3), differs by the fact that pin (3) includes the section covered with sleeve (6) containing circular cylindrical outer surface; at that, sleeve is tightly attached to the pin and located in seat (20) of the housing, which is restricted with circular cylindrical wall (26). At that, sealing gasket (30) is installed between outer surface of sleeve and the wall restricting the seat.

EFFECT: improving tightness of connection between contact pins and housing.

8 cl, 5 dwg

 

The present invention relates to any device, such as connectors, electronic boxes, and in General to any devices, comprising a housing in which the set of one or more contact pins, where the tightness of the connection between the pin and the housing is the primary requirement.

Known, for example, the gas injector containing a diaphragm driven by an electromagnet which is energized by an electric current through the contact pins made protruding from the nozzle.

Typically, the nozzle is performed by molding or by injection molding in such a way that it overlaps a portion of the pin, forming an intermediate space between the housing and the pin. This intermediate space is not completely sealed, and the gas in the nozzle under pressure, may go out through this intermediate space.

It was proposed to establish between the casing and the pin gasket, but this solution in practice can only be applied to the contact pins of circular cross section.

The present invention is to improve the tightness between the contact pins and the housing, in which set these pins, including in the case of pins of noncircular cross section.

According to the invention, CR is alagaesia device housing, which is at least one contact pin in which the pin contains a plot, a closed casing containing a cylindrical outer surface, the sleeve is hermetically fixed to the contact pin and fitted in the socket housing, limited to a cylindrical wall between the outer surface of the socket and the wall bounding the slot, install the seal.

Thus, when installing additional components between the contact pin and the housing instead of one intermediate space receive two intermediate space:

the first intermediate space between the pin and the sleeve, which condense due to the tight fastening, for example by adhesive or soldering;

the second intermediate space between the sleeve and the housing, which condense through the gasket installed between the two cylindrical walls.

These two intermediate space is compacted through more efficient seal than simple contact between the casing and the pin obtained by injection molding of the housing around the pin, so the tightness of the device is improved.

The object of the present invention is also a method of manufacturing such a device,containing the following steps:

the sleeve is put on the pin and separat in the longitudinal direction relative to the pin; and

the sleeve still connect with pin due to capillary impregnation liquid connective substance seeping between the pin and sleeve.

The present invention will be more apparent from the following description with reference to the accompanying drawings, on which:

figure 1 is a side view of the cover gas injector in accordance with the present invention, shown in partial section along the line I-I of figure 2 at the level of one of the contact pins;

figure 2 is a front view of the cap of the nozzle shown in figure 1;

figure 3 is a partial enlarged view of the cover shown in figure 1, at the level of the liners;

4 is a front view of the contact pin and the sleeve during the fixed connection of the sleeve with pin;

5 is an enlarged view in section along the line V-V of figure 4.

As shown in figure 1, the cover gas injector in accordance with the present invention includes a housing 1 containing the lower portion, configured to install itself on the nozzle, not shown in the drawing. In case 1, the cover is an electromagnet (the drawing is not visible)that is designed to actuate the movable element of the nozzle, for example, of the diaphragm.

The housing 1 includes a part made in the form of connector 2 to the m are metal contact pins 3 (in the drawing there is only one pin), designed to supply electric power to the electromagnet.

Each of the pins 3 contains an open area extending from the housing 1, then plot the 5 compounds with a metal sleeve 6, is made in the continuation of free phase 4.

The sleeve 6 is put on the pin 3 and is fixed thereto by soldering at the level of the connecting section 5 by means of alloy for brazing, which feature so that it completely fills the space between the sleeve 6 and pin 3, providing, thus, a tight connection between the sleeve 6 and pin 3.

To make this connection, as shown in figure 4, the pin 3 is placed in a mounting device (not shown), the retaining pin 3 so that the free area 4 had the vertical direction. Then pin 3 to put on the sleeve 6. In this case, pin 3 is the elongation in the form of a hook, the base of which rests against the sleeve 6, the sleeve 6 in a natural way is now opposite the connecting section 5 of the pin 3.

On pin 3 wear ring 11 of the alloy for brazing so that it relied on the sleeve 6. The ring 11 alloy for soldering heat (for example, through a high frequency coil located around the free section of the pin) so that the solder is melted and due to capillarity penetrated between Styria is 3 and sleeve 6. In this regard, the sleeve 6 perform a beveled chamfer 12, which facilitates the penetration of the liquid alloy between pin 3 and sleeve 6.

Hardening alloy for brazing provides a tight seal between the pin 3 and the sleeve 6.

According to a preferred variant of the invention, the sleeve 6 is left free in the radial direction relative to pin 3 on the stationary phase connection so that the sleeve 6 has taken its position radially relative to the pin only due to the effect of surface tension in the molten solder.

In this regard, as shown in particular in figure 5, in the case of pin rectangular sleeve 6 includes a rectangular inner wall 9, the parallel opposite outer surface 10 of the pin 3. Under the action of surface tension of the alloy for soldering forms around the sleeve 6 and pin 3 strip of constant thickness, providing a centering sleeve 6 on the pin 3 and uniform heat transfer between the pin 3 and the sleeve 6.

Then pin 3 connected to the sleeve 6, is placed in a mold and around the pin 3 by injection molding performing case 1.

In this regard, it is necessary that the material used to perform the corps, had a temperature of injection molding, the lower the melting temperature of the alloy for soldering, so that g is Lisa could not detach from the pin during molding of the housing 1. For example, if the casing is made of aluminum, for mounting the sleeve on the pin by soldering, you can use the tin alloy and aluminum.

As shown, particularly in figure 3, the housing 1 restricts round socket 20, in which the sleeve 6. The socket 20 has a first circular portion 21, outward opening, then after a tapered transition 22 - second round portion of smaller diameter bounded by a cylindrical wall 26, performed in front of a cylindrical outer surface 13 of the sleeve 6.

The socket 20 is continued beyond the end of sleeve 6 and has a bottom, which begins the Central thickening 24, which tightly encloses the portion of the outer surface 13 of the sleeve 6, increasing, thus, the rigidity of the connection between pin 3 and the housing 1.

Thickening 24 limits on the outer surface 13 of the sleeve 6, the shoulder 25, preferably of conical shape, forming a saddle for toroidal strip 30 that is installed between the outer surface 13 of the sleeve 6 and the front wall 26 of the socket 20. Thus, a toroidal gasket 30 provides a seal between the sleeve 6 and the housing 1.

Part of the slot 20 adjacent the shoulder 25 and located between the wall 26 and the Central thickening 24, forms a cavity 27, a closed toroidal gasket 30 and containing particularly the number of air remaining there after installing toroidal strip 30 in place. In practice, the cavity 27 must be sufficiently large to install in place of the toroidal strip 30 in the cavity 27 was only a slight increase of the pressure of the air trapped in the cavity 27, and that the pressure increase does not interfere with the movement of the toroidal strip 30 until the shoulder 25.

In order to prevent ejection of a toroidal gasket 30 under the action of the pressure of the gas leaking along the outer surface of the pin 3 to the cavity 27 from the side of a toroidal gasket 30, opposite the saddle 26, install the snap ring 31, with the specified lock ring 31 is held springy flap washer 32 (partially shown in figure 2), which is inserted into the first part 21 of the slot 20, then press the tapered transition 22 of the socket 20 so that the base of the petals stuck on the outer surface 13 of the sleeve 6 due to the effect of samozakryvaniya.

The present invention is not limited to the described variant of implementation and may include any other options, not beyond the scope defined by the attached claims.

In particular, although the invention has been presented for the pin is not of circular cross section, it can also be used for pin circular cross-section, when acompila allows the use of a toroidal gasket larger than the size of the strip, adapted to the diameter of the pin, and therefore, such a gasket is easier to set in place.

During the connection of the sleeve with the pin sleeve is now opposite the connecting section of the pin due to the special shape of the pin, however, can be provided and the outer locking.

Although, as stated, the sleeve and pin are connected by soldering with the use of the alloy as solder, the connection sleeve and the pin can be done by other connecting means, such as liquid glue. You can also apply other methods of sealing, for example soldering without solder.

As stated, the sleeve do metal, but it can be made of any other material, such as plastic sheeting.

According to the described embodiment, the inner wall of the sleeve is parallel to the outer surface of the pin, however, it is possible to provide the inner wall of the sleeve in any form.

As shown, the casing is tightly covers part of the outer surface of the liner, which increases the rigidity of the connection between the pin and the housing, but the housing can and not to cover tightly the sleeve. In this case, the saddle can be performed on the body so that it was on the wall 26, the limiting slot. The saddle can also be performed on the outer surface of ILSI.

In the present embodiment, the sleeve is in the nest, leaving out the body, but it can be deep in the nest. In this case, the sealing strip can be mounted inside the hull.

1. The device body (1), which has at least one contact pin (3), characterized in that the pin contains a section (5), the closed sleeve (6)containing a cylindrical outer surface (13), and the sleeve is hermetically attached to the pin and is located in the socket (20), limited to a cylindrical wall (26), while between the outer surface (13) of the socket and the wall (26), bounding the slot, installed the gasket (30).

2. The device according to claim 1, characterized in that the casing is made with partially overlapping the outer surface (13) of the sleeve (6) and the formation of a shoulder (25) on the outer surface.

3. The device according to claim 2, characterized in that the housing (1) limits the cavity (27)adjacent to the shoulder (25) and a closed sealing gasket (30).

4. The device according to claim 1, characterized in that on the side of the sealing strip (30) set ring (31), and the ring separat locking element (32), fixed on the sleeve (6).

5. A method of manufacturing the device case (1), which is, at the very measures which, one contact pin (3), characterized in that the sleeve (6) is put on the pin and separat in the longitudinal direction relative to the pin, the sleeve still connect with pin by capillary impregnation liquid connective substance seeping between the pin and the sleeve, and the pin so equipped his sleeve, then placed in the casing (1) of the device, the housing (1) devices perform the molding around the pin (3), equipped with a sleeve (6), the housing is made of a material having a temperature injection molding less than the melting temperature of the connecting material.

6. The method according to claim 5, characterized in that the stationary phase connection sleeve with pin for pin wear ring (11) from solid alloy for brazing so that the ring relied on the sleeve, and the ring of alloy for soldering melted so that the alloy for soldering penetrated between the sleeve and the pin.

7. The method according to claim 5, characterized in that the sleeve (6) has an internal surface (9), parallel opposite outer surface (10) of the pin (3), while the sleeve remains free in the radial direction relative to the pin on the stationary phase connection.

8. The method according to claim 5, characterized in that between the outer surface is Yu (13) of the sleeve opposite wall (26) socket housing (1), in which is a socket, install the gasket (30).



 

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EFFECT: improved quality of soldered joints.

12 cl, 3 ex

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