KR20170001934U - Coil connecting structure of solenoid valve - Google Patents

Abstract

A coil connection structure of a solenoid valve according to an embodiment of the present invention includes: a bobbin part having a structure in which a coil is wound on an outer surface and an inner part is hollow; A pair of drawing pins connected to the coil and coupled to the bobbin portion so as to protrude therefrom; An engaging and securing plate coupled with the ground electrode at a position spaced apart from the coil and having a plurality of first press-fitting openings; And a plurality of press-fit projections that are press-fitted into the plurality of first press-fit openings, a second press-fit opening at a position spaced apart from the plurality of press-fit projections, and a pair of circuit patterns provided on the outer surface, And the pair of application terminals are respectively fixed to the bobbin portion and the engaging and fixing plate by press-fitting the lead-out pin into the second press-in opening and pressing the plurality of press-in protrusions into the first press- It is preferable to restrict the movement of the drawing pins of the pair.

Description

[0001] The present invention relates to a coil connecting structure of a solenoid valve,

The present invention relates to a coil connection structure of a solenoid valve, and more particularly, to a solenoid valve coil connection structure for stably applying a current flowing through a coil to a circuit pattern without short-circuiting when a current is applied to the coil of the solenoid valve.

A general fluid control system, which controls the fluid flow of an automation device using hydraulic or pneumatic pressure, or which includes a fuel supply system of a vehicle, an automation device, a refrigeration appliance or a refrigerant circulation system of a refrigeration appliance, An electronic solenoid valve is widely used as a means for controlling the flow of a fluid such as a fluid.

1 is a cross-sectional view of such a conventional solenoid valve assembly.

1, the solenoid valve 1 has a bobbin 12 having a hollow portion with open ends at both ends thereof and is installed in the main body 10. A solenoid valve 1 is mounted on the outer circumferential surface of the bobbin 12, And a plunger 14 interlocked with a core 13 as a fixed end is installed in the hollow portion.

In this solenoid valve 1, the pin 15 connected to the coil 11 is provided on the bobbin 12, and the pin 15 is soldered to the circuit board 20 on which the circuit pattern is formed.

However, the soldering connection method with the circuit board 20 is troublesome, and harmful substances which are harmful to the human body are generated and it is difficult to re-dissolve if necessary. In addition, the soldering portion has a problem in that its rigidity with respect to the circuit pattern connecting portion is low due to vibration, so that it is easily disconnected from the external environment and malfunction of the solenoid valve is caused due to connection failure.

International Publication No. WO1998007603 discloses a solenoid coil structure and interconnection.

In the present invention, the circuit pattern is provided at the application terminal connected to the lead-out pin, and the coupling characteristic between the lead-out pin and the bobbin portion is improved by utilizing the structural characteristic of the application terminal connected to the lead- And a coil connection structure for a solenoid valve.

The present invention also relates to a coil connection of a solenoid valve capable of eliminating the generation of environmentally harmful substances generated in the process of soldering a circuit board and a lead-out pin to a bobbin by connecting an application terminal to a bobbin portion by a press- And to provide a structure.

In addition, the present invention provides a solenoid valve which can simplify the joining process by connecting the application terminal to the joint fixing plate and the drawing pin in a press-fitting manner rather than fixing the circuit board and the drawing pin to the bobbin by the brazing method It is an object of the present invention to provide a coil connection structure.

A coil connection structure of a solenoid valve according to an embodiment of the present invention includes: a bobbin part having a structure in which a coil is wound on an outer surface and an inner part is hollow; A pair of drawing pins connected to the coil and coupled to the bobbin portion so as to protrude therefrom; An engaging and securing plate coupled with the ground electrode at a position spaced apart from the coil and having a plurality of first press-fitting openings; And a plurality of press-fit projections that are press-fitted into the plurality of first press-fit openings, a second press-fit opening at a position spaced apart from the plurality of press-fit projections, a pair of circuit patterns provided on the outer surface, And the pair of application terminals are respectively fixed to the bobbin portion and the engaging and fixing plate by press-fitting the lead-out pin into the second press-in opening and pressing the plurality of press-in protrusions into the first press- It is preferable to restrict the movement of the drawing pins of the pair.

In one embodiment of the present invention, the application terminal is provided with a bent portion having a structure in which a second press-fit opening is provided and one surface is caught in the bobbin portion, and a protruding portion projecting upwardly to the surface provided with the second press- It is preferable that a structure in which a plurality of press-fit projections are provided at positions spaced apart from the press-fit opening, and a circuit board portion provided with a circuit pattern on the outer surface thereof is integrally formed.

In one embodiment of the present invention, the cross-section of the second press-fit opening preferably has a shape corresponding to the cross-section of the pull-out pin.

In one embodiment of the present invention, the bobbin portion includes: a bobbin body having a coil wound thereon and a pair of drawing pins provided on one side; And a supporting member having a lower surface coupled to the bobbin body facing the coil and having an upper surface coupled to the lower surface of the bobbin body, wherein the coupling plate is coupled to the supporting member by a coupling member.

In the present invention, the circuit board on which the conventional circuit pattern is formed and the lead-out pin are soldered to the bobbin so that the robustness of the portion where the lead-out pin and the circuit board are connected is lowered due to the vibration during operation of the solenoid valve, The circuit pattern is provided at the application terminal connected to the drawing pin and the coupling degree between the drawing pin and the bending portion is improved by using the structural characteristic of the applying terminal, It is possible to prevent the connection failure between the drawing pin and the applying terminal due to the vibration of the bobbin portion when the valve is operated, and in addition, the quality of the solenoid valve can be improved.

Unlike the prior art in which a circuit board and a lead-out pin are connected to a bobbin by a soldering method, an application terminal provided with a circuit pattern is connected to a bobbin portion by a press-fit joint method without soldering, The generation of harmful substances can be eliminated.

In addition, the present invention has a structure in which the application terminal is connected to the joint fixing plate and the drawing-out pin in a press-fitting manner, as compared with the case where the circuit board and the drawing-out pin are conventionally fixed to the bobbin by the soldering method. It is possible to simplify the bonding process with the terminal.

In addition, the present invention can replace the drawing pin and / or the applying terminal easily at the bobbin portion by connecting the application terminal and the drawing-out pin by using a press-fitting joint method instead of the conventional soldering method, Which can increase the service life of the product.

1 schematically illustrates a cross-sectional view of such a conventional solenoid valve assembly.
2 is a perspective view of a coil connection structure of a solenoid valve according to an embodiment of the present invention.
3 is a schematic exploded perspective view of a coil connection structure of a solenoid valve according to an embodiment of the present invention.
4 schematically shows a cross-sectional view cut along the line AA in Fig.
FIG. 5 is a schematic cross-sectional view taken along line BB of FIG. 2. FIG.
Fig. 6 schematically shows a cross-sectional view of an enlarged view of a portion C in Fig.
FIG. 7 is a cross-sectional view of a coil connecting structure of a solenoid valve according to an embodiment of the present invention, in which a plunger and a core are installed. FIG.

Hereinafter, a coil connection structure of a solenoid valve according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

The present invention relates to a coil connection structure of a solenoid valve for stably applying a current flowing through a coil 113 of a solenoid valve to a circuit pattern without a short circuit. The solenoid valve is a valve that controls the flow of the fluid by driving the plunger 180 by the electromagnetic force generated by the current applied to the coil 113.

2 to 5, the coil connection structure 100 of the solenoid valve includes a bobbin portion 110, an engaging and fixing plate 120, a pair of drawing pins 131 and 132, Terminals 141 and 142, respectively.

3, the bobbin portion 110 includes a bobbin body 111 and a support member 115. [ As shown in Fig. 3, the bobbin body 111 has a coil 113 wound around its outer surface. Here, the coil 113 forms a magnetic field when an electric current is applied.

The bobbin body 111 is provided with a pair of drawing pins 131 and 132 on one side thereof. As shown in FIG. 3, a step portion 111a is provided at an upper end of the bobbin body 111 at one side. The step portion 111a is provided adjacent to a portion where the pair of drawing pins 131 and 132 are installed. The step portion 111a is a portion to which the bent portions 141a and 142a of the applying terminal are coupled.

As shown in FIG. 4, the bobbin body 111 has a hollow inner space 112. 7, the inner space 112 of the bobbin body 111 is provided with a plunger 180 interlocked with the core 190 as a fixed end. The plunger 180 is operated by a magnetic field generated in the coil 113 at the time of current application. Since the operation structure of the plunger 180 and the core 190 corresponds to a known technology, a detailed description thereof will be omitted in order to avoid repeating the description in this embodiment.

The support member 115 has a bottom surface coupled to the bobbin body 111 to face the coil 113 and a coupling and fixing plate 120 installed on the top surface. The support member 115 has a U-shaped structure in which both side surfaces 115 and 115b are bent with respect to the upper surface.

The upper surface of the support member 115 is provided with an upper surface opening 115d communicating with the engaging opening 125 of the concave fixed plate 120. [ On both sides of the support member, a first opening 115c and a second opening 115e communicating with the inner space 112 of the bobbin body 111 are provided.

The plunger 180 is inserted into the bobbin body 111 through the first opening 115c and the core 190 is inserted into the bobbin body 111 through the second opening 115e. The support member 115 is bolted to the bobbin body 111. [

2 and 3, the engaging fixing plate 120 is positioned to abut the upper surface of the supporting member 115, and is coupled to the supporting member 115. As shown in Fig. The engaging fixing plate 120 has a structure in which the other surface 122 is bent with respect to the one surface 121 in order to facilitate positioning with respect to the supporting member 115. [ The coupling and fixing plate 120 is mounted on the upper surface of the support member and is fixed to the support member 115 by a coupling member 160. [

The coupling and fixing plate 120 is for fixing the ground electrode 150 and the pair of application terminals 141 and 142. The engaging fixing plate 120 is provided with a plurality of first press-fitting openings 123 and engaging openings 125.

The plurality of first press-fit openings 123 are openings into which the press-fit projections 141d of the application terminals 141 to be described later are press-fitted. The coupling opening 125 is a portion where the coupling member 160 passing through the ground electrode 150 is fastened.

The engaging fixing plate 120 is engaged with the supporting member 115 by the engaging member 160. The coupling member 160 penetrates the coupling and fixing plate 120 and the ground electrode 150 to fix the coupling and fixing plate 120 and the ground electrode 150 to the supporting member 115. The engaging member 160 sequentially passes through the engaging opening 125 of the engaging and fixing plate 120 and the electrode opening 151 of the ground electrode 150 and the upper surface opening 115d of the supporting member, The coupling and fixing plate 120 and the support member 115 are connected.

The present invention can easily separate the grounding electrode 150 and the coupling and fixing plate from the supporting member in such a manner that the coupling member 160 is separated from the supporting member so that the grounding electrode 150 and the coupling and fixing plate 120 Components can be easily replaced or maintained at the time of breakage of the element.

A pair of drawing pins 131 and 132 are provided on the bobbin body 111 so as to be in contact with the coil 113. [ Specifically, the pair of drawing pins 131 and 132 are coupled to the bobbin body 111 such that one end thereof is connected to the coil 113 and the other end is protruded to the upper portion of the bobbin body 111.

The pair of drawing pins 131 and 132 are spaced apart from each other and positioned. The pair of drawing pins 131 and 132 are fixed to the bobbin body 111 by a pair of application terminals 141 and 142, respectively. The pair of drawing pins 131, 132 are connected to the coupling and fixing plate 120 by a pair of application terminals 141, 142.

The drawing pins 131 and 132 have a metal material and are electrically connected to a circuit pattern provided on an application terminal when a current is applied to the coil 113. [ The drawing pins 131 and 132 may have a circular or polygonal cross section, and the shape of the drawing pins 131 and 132 is not particularly limited in the present embodiment.

The pair of application terminals 141 and 142 are connected to a pair of drawing pins 131 and 132, respectively. The pair of application terminals 141 and 142 are formed by bending portions 141a and 142a, circuit board portions 141b and 142b, a plurality of indentation protrusions 141d and second indentation openings 141c and 142c. The pair of application terminals 141 and 142 have the same structure. It is preferable that the application terminal is made of a material which can be easily electrically connected to the drawing pins 131 and 132.

The bent portions 141a and 142a have a structure in which one side is hooked to the step portion 111a of the bobbin body 111. The bent portions 141a and 142a are provided with second press-fitting openings 141c and 142c on the bent surfaces of the bent portions 141a and 142a. Here, the bent portions 141a and 142a are portions for fixing the drawing pins 131 and 132 at a predetermined position.

The second press-fitting openings 141c and 142c are openings through which the drawing pins 131 and 132 pass. The cross-section of the second press-fitting openings 141c and 142c has a shape corresponding to the cross-section of the drawing pins 131 and 132. The drawing pins 131 and 132 are press-fitted into the second press-fitting openings 141c and 142c, and are connected to the application terminals without performing a soldering process unlike the conventional method.

The circuit board portions 141b and 142b have a structure in which the circuit board portions 141b and 142b protrude upward from the surface provided with the second press-fit openings 141c and 142c. The circuit board portions 141b and 142b are provided with circuit patterns electrically connected to the drawing pins 131 and 132. In this embodiment, a circuit pattern is formed on an application terminal for fixing the drawing pins 131 and 132 to the bobbin portion 110, and a circuit board which is conventionally coupled to the bobbin by soldering can be omitted.

A plurality of press-fit projections 141d are provided at the lower ends of the circuit board portions 141b and 142b. Here, the plurality of press-fit projections 141d are provided at positions spaced apart from the second press-fit openings 141c and 142c. The plurality of press-fit projections 141d are portions press-fitted into the plurality of first press-fit openings 123 provided in the coupling and fixing plate 120. [ The circuit board portions 141b and 142b press the plurality of press-fit projections 141d into the plurality of first press-fit openings 123 and are connected to the joint fixture plate 120, respectively.

The application terminals 141 and 142 having the above-described structure can be connected to the lead-out pins 131 and 132 without using a separate component such as a bolt or a screw, or without performing a separate joining process such as soldering. Can be firmly coupled to the bobbin portion 110.

In addition, the application terminals 141 and 142 according to the present embodiment are configured such that a magnetic field is formed in the coil 113 and the plunger 180 is rotated by the vibration generated in the bobbin portion 110 by the interlocking operation with respect to the core 190 The bent portions 141a and 142a for fixing the drawing pins 131 and 132 and the circuit board provided with the circuit pattern are integrally formed so as to form the drawing pins 131 and 132, It is possible to prevent the connection failure that would otherwise occur when the drawing pins 131 and 132 are disconnected from the circuit board by increasing the coupling force between the connecting terminals 131 and 132 and the application terminals 141 and 142. [

The pair of application terminals 141 and 142 are connected to the ground electrode 150 by the coupling and fixing plate 120. The ground electrode 150 is spaced apart from the pair of application terminals 141 and 142. As described above, the ground electrode 150 is connected to the engaging fixing plate 120 and the supporting member 115 by the engaging member 160. Even if the ground electrode 150 is applied to the pair of application terminals 141 and 142 through the pair of drawing pins 131 and 132, the potential of the other component parts of the coil connection structure 100 of the solenoid valve is set to zero Comfort.

Hereinafter, a connection method of the components of the coil connection structure 100 of the solenoid valve will be described.

First, the coil 113 is wound on the bobbin body 111. Then, the support member 115 is coupled to the bobbin body 111 so as to cover the upper portion of the bobbin body 111. At this time, the support member 115 is coupled to the bobbin body 111 such that the first opening 115c and the second opening 115e communicate with the inner space 112 of the bobbin body 111. The support member 115 may be coupled to the bobbin body 111 by a coupling part such as a bolt.

And a pair of drawing pins 131 and 132 are coupled to the bobbin body 111. At this time, the pair of drawing pins 131 and 132 are provided on the bobbin body 111 so as to be electrically connectable to the coil 113. [

The ground electrode 150 is positioned on the upper surface of the support member 115. The coupling and fixing plate 120 is positioned on the upper surface of the support member 115 so as to cover a part of the ground electrode 150 and connects the ground electrode 150 and the support member 115 by the coupling member 160 . The ground electrode 150 is fixed at a predetermined position on the upper surface of the supporting member 115 by the engaging member 160 and the engaging and fixing plate 120.

Next, a pair of the application terminals 141 and 142 are respectively attached to the coupling fixing plate 120 and the pair of drawing pins 131 and 132, respectively, in order to fix the pair of drawing pins 131 and 132, respectively Is pressed. At this time, a plurality of press-fit projections 141d are press-fitted into a plurality of first press-fit openings 123 provided at the coupling and fixing plate 120 and connected to the coupling and fixing plate 120 at the application terminal.

The application terminals 141 and 142 are press-fitted into the second press-fit openings 141c and 142c by a pair of drawing pins 131 and 132 so that the drawing pins 131 and 132 are connected to each other, And is connected to pins 131 and 132 for use. In this embodiment, the pair of drawing pins 131 and 132 are press-fitted into the second press-fitting openings 141c and 142c in a surface contact manner, so that the frictional resistance is high and are firmly coupled to the pair of application terminals. The pair of drawing pins 131 and 132 are prevented from being detached from the application terminal during external impact or transportation after being pushed into the pair of application terminals 141 and 142, Malfunction of the solenoid valve due to connection failure can be prevented.

The present invention can connect the drawing pins 131 and 132 and the application terminal provided with the circuit pattern through the above structural limitation of the application terminal without omitting the environmentally harmful soldering process.

In addition, the present invention is not a conventional soldering method, but connects the drawing pins 131, 132 with the application terminals through a press fitting joint method, so that the draw- It is possible to improve the quality of the solenoid valve by preventing a situation such as a connection failure which is generated when the solenoids 131 and 132 are disconnected from the circuit board.

In addition, the present invention relates to a method for connecting a coupling and fixing plate 120 and a bobbin 110 by using a coupling member 160 and connecting the coupling and fixing plate 120 and the drawing pins 131 And 132 to easily replace the components constituting the coil connection structure 100 of the solenoid valve 100, thereby increasing the service life of the product.

Therefore, the embodiments disclosed in this specification are intended to illustrate rather than limit the technical idea of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas which are within the scope of the same shall be construed as being included in the scope of the present invention.

100: coil connection structure of solenoid valve
110: bobbin portion 111: bobbin body
113: coil 115: support member
120: engaging fixing plate 123: first press-fitting opening
131, 132: a pair of drawing pins 141, 142: a pair of application terminals
150: ground electrode 160: coupling member

Claims (4)

A bobbin portion having a structure in which a coil is wound on the outer surface and the hollow portion is hollow;
A pair of drawing pins connected to the coil and coupled to the bobbin portion so as to protrude therefrom;
An engaging and securing plate coupling the ground electrode to the bobbin at a position spaced apart from the coil and having a plurality of first press-fitting openings; And
A plurality of press-fit projections that are press-fitted into the plurality of first press-fit openings; and a second press-fit opening at a position spaced apart from the plurality of press-fit projections, wherein circuit patterns are provided on the outer surface, And a pair of application terminals,
Wherein the pair of application terminals are respectively fixed to the bobbin portion and the engaging and fixing plate by press-fitting the lead-out pin into the second press-fit opening and press-fitting the plurality of press-in projections into the first press- And the movement of the pair of drawing pins is restricted.
The semiconductor device according to claim 1,
A bent portion having a structure in which the second press-fit opening is provided and one surface of which is engaged with the bobbin portion;
And a plurality of press-fit protrusions provided at positions spaced apart from the second press-fit opening, the circuit board portion having the circuit pattern formed on its outer surface integrally formed with the second press- And the coil connection structure of the solenoid valve.
3. The method of claim 2,
Wherein a cross section of the second press-fitting opening has a shape corresponding to an end surface of the drawing pin.
The bobbin part according to claim 1,
A bobbin body in which the coil is wound and the pair of drawing pins are installed on one side; And
And a supporting member which is coupled to the bobbin body so as to face the coil and has the coupling and fixing plate on its upper surface,
Wherein the coupling fixed plate is coupled to the support member by a coupling member, the ground electrode being placed on the upper surface of the support member.

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