Low current solenoid valve

Abstract

The utility model provides a kind of low current electromagnetic valve, which effectively avoids the risk of enameled wire breaking during assembly, ensures that the electromagnetic valve can be reliably and safely assembled, and improves the assembly efficiency of the electromagnetic valve. It comprises: a framework, including a substrate, an upper convex framework body and a lower convex pin; an enameled wire; a short needle; a base, including an electromagnet positioning installation cavity and a single needle assembly installation cavity; an electromagnet; and a single needle assembly, including a connecting pin and a plastic part; in the assembled state, the plastic part is embedded in the single needle assembly installation cavity, the lower end of the electromagnet is embedded in the electromagnet positioning installation cavity, the framework is fitted on the corresponding position of the electromagnet, the bottom of the lower convex pin is inserted into the inner hole of the connecting pin, and the bottom of the lower convex pin is wrapped with the enameled wire, one end of the enameled wire is stably wrapped around the outer ring of the bottom of the lower convex pin by molten metal, one end of the enameled wire is electrically connected to the inner hole wall of the connecting pin, and the lower convex end of the connecting pin is sealed.

Description

Technical Field

[0001] This utility model relates to the technical field of gas flameout protection devices, specifically a low-current solenoid valve. Background Technology

[0002] The solenoid valve in the flameout protection device of a gas stove can promptly cut off the gas supply after the stove accidentally goes out. Currently, there are two types of solenoid valves for this purpose, based on their power supply method: one is directly powered by a thermocouple; the other is powered by a battery. The latter type of solenoid valve has become the preferred choice for high-end gas stoves because it can be controlled to close at any time. Since this type of solenoid valve uses battery power, it must have extremely low power consumption. Therefore, the coil used in this type of solenoid valve generally has high resistance and very low operating current. To achieve high resistance within the limited size of the solenoid valve, the coil must be made of very fine enameled wire, such as 0.03mm diameter enameled wire.

[0003] This type of low-current solenoid valve generally includes a valve seat, a single-needle assembly, and a coil structure for transmitting electromagnetic force. The coil structure consists of a frame, enameled wire, a long needle, and a short needle. (See...) Figure 1 During coil assembly, the enameled wire is wound around the main body of the frame, and its two ends are then wound around long needles and short needles respectively. Finally, solder is applied to the two needle winding points. Figure 1 As shown, the long needle, the enameled wire, and the solder are located in the exposed area at the lower end of the lower convex pin of the frame. The upper part of the long needle is inserted into the guide hole of the lower convex pin. The lower part of the long needle corresponding to the lower convex pin is wrapped with enameled wire and soldered. Then, the enameled wire enters the guide groove of the lower convex pin through a transition lead 1. The transition lead 1 is located between the bottom of the lower convex pin and the solder area. During the assembly of the solenoid valve, the long needle and the lower convex pin need to pass through the through hole of the solenoid valve base. In actual assembly, since the transition lead 1 is located radially outside the long needle, there may be friction between the transition lead and the through hole, which may lead to the breakage of the very thin enameled wire. When the enameled wire breaks, the entire solenoid valve will not work, which will cause the gas stove flameout protection device to fail.

[0004] In addition, in existing low-current solenoid valves, the long needle extends to the needle end of the single needle assembly, with the long needle protruding out of the needle end hole. The connection and sealing are then completed by welding. In actual assembly, the long needle and the single needle need to be assembled, and the corresponding needle end holes of the long needle and the single needle need to be additionally welded, which makes the manufacturing of the entire low-current solenoid valve relatively complicated.

[0005] Therefore, there is an urgent need to develop a low-current solenoid valve that can avoid the risk of enameled wire breakage, reduce the manufacturing process of the entire solenoid valve, and improve assembly efficiency. Utility Model Content

[0006] To address the aforementioned issues, this invention provides a low-current solenoid valve that effectively avoids the risk of enameled wire breakage during assembly, ensuring reliable and safe assembly of the solenoid valve and improving its assembly efficiency.

[0007] A low-current solenoid valve, characterized in that it comprises: The skeleton includes a substrate, an upper protruding skeleton body, and a lower protruding pin; Enameled wire; Single stitch; The base includes an electromagnet positioning and mounting cavity and a single-needle assembly mounting cavity; Electromagnets; And a single-needle assembly, which includes a connecting needle and a plastic component; In the assembled state, the plastic part is embedded in the single-needle assembly mounting cavity, the lower end of the electromagnet is embedded in the electromagnet positioning mounting cavity, the skeleton is fitted onto the electromagnet at the corresponding position, the bottom of the protruding pin is inserted into the inner hole of the connecting pin, and the bottom outer circumference of the protruding pin is wrapped with enameled wire. One end of the enameled wire is stably wrapped around the bottom outer circumference of the protruding pin by molten metal material, and one end of the enameled wire is electrically connected to the inner wall of the connecting pin. The protruding end of the connecting pin is sealed.

[0008] Its further features are: The bottom of the lower convex pin is a tapered shape that expands from bottom to top, and an annular groove is provided at the lower part of the tapered area. A stop cone ring is provided at the lower end of the tapered area. The enameled wire is wound around the height area of ​​the annular groove and is limited at the bottom by the stop cone ring. The lower protruding pin also includes an upper enameled wire through hole. The upper part of the lower protruding pin corresponding to the annular groove is provided with a notch or groove that connects to the enameled wire through hole. The notch or groove is located within the outer periphery of the lower protruding pin, so that the remaining part of the enameled wire located on the lower protruding pin does not protrude beyond the outer periphery of the lower protruding pin. The lower protruding pin is provided with a wire passage groove on the upper outer surface of the annular groove. The lower end of the wire passage groove is connected to the upper part of the annular groove, and the upper end of the wire passage groove is connected to the through hole of the enameled wire. The radial surface of the upper middle part of the lower protruding pin is a vertical plane, and the through groove is specifically a straight groove formed by the indentation between the annular groove and the enameled wire through hole. The through hole of the enameled wire has an open structure corresponding to the radial position of the vertical plane. This allows the operator to directly lay the enameled wire without threading it when it passes through this position, making the assembly of the enameled wire convenient and quick. A central notch is formed at the bottom of the lower protruding pin corresponding to the inner post position of the annular groove. The central notch penetrates the stop cone ring and is located at the lower end of the wire passage groove. This allows the enameled wire to directly enter the enameled wire through hole along the wire passage groove. Furthermore, due to the central notch, when the conductive part wrapped with enameled wire and molten metal comes into contact with the inner wall of the connecting pin, the central notch has a self-adjusting function. External force can make the outer part of the conductive part and the inner wall of the connecting pin make tight and reliable contact. The molten metal material is specifically solder; When the lower protruding end of the connecting pin has a central hole structure, the central hole structure is plugged by welding to form a seal and ensure a tight seal. When the bottom of the lower protruding end of the connecting pin is a solid closed structure, the seal is already formed during the manufacturing of the connecting pin, and the lower protruding end of the connecting pin can be directly inserted, reducing the additional welding process.

[0009] By adopting the solution of this utility model, the lower protruding pin of the skeleton is extended so that the bottom of the lower protruding pin is inserted into the inner hole of the connecting pin, and the bottom outer circumference of the lower protruding pin is wrapped with enameled wire. The enameled wire is electrically connected to the inner hole wall of the connecting pin through molten metal material, and the lower protruding end of the connecting pin is sealed. This eliminates the need for a long pin and allows for direct electrical connection at the upper part of the connecting pin and the position where the enameled wire is wrapped around the lower protruding pin. The other end of the enameled wire is wrapped around the upper protruding skeleton body from bottom to top along the corresponding hole groove of the skeleton before connecting to the short pin. This effectively avoids the risk of the enameled wire breaking during assembly, ensuring that the solenoid valve can be assembled reliably and safely. Furthermore, since no long pin is needed, the assembly efficiency of the solenoid valve is improved. Attached Figure Description

[0010] Figure 1 A side view of the assembly structure of a solenoid valve coil in the prior art; Figure 2 This is a side view of the assembly of the solenoid valve coil in a specific embodiment of the present invention; Figure 3 This is a front view of the assembly of the solenoid valve coil in a specific embodiment of this utility model; Figure 4 This is a side sectional view of the solenoid valve according to a specific embodiment of the present invention (enameled lines omitted). Figure 5 This is a front sectional view of the solenoid valve according to a specific embodiment of the present invention (enameled lines omitted). Figure 6 This is a three-dimensional cross-sectional view of the skeleton of this utility model; The names corresponding to the serial numbers in the diagram are as follows: 10. Frame, 20. Enamelled wire, 30. Short needle, 40. Base, 41. Electromagnet positioning and mounting cavity, 42. Single needle assembly mounting cavity, 50. Electromagnet, 60. Single needle assembly, 61. Connecting needle, 611. Sealing, 62. Plastic part, 70. Substrate, 80. Upper convex frame body, 90. Lower convex pin, 90. Vertical plane, 91. Annular groove, 92. Stop cone ring, 93. Enamelled wire through hole, 94. Wire groove, 95. Center notch groove, 100. Molten metal material. Detailed Implementation

[0011] A low-current solenoid valve, see Figures 2-6 It includes a frame 10, enameled wire 20, short needle 30, base 40, electromagnet 50, and single needle assembly 60. The skeleton 10 includes a substrate 70, an upper convex skeleton body 80, and a lower convex pin 90; The base 40 includes an electromagnet positioning and mounting cavity 41 and a single needle assembly mounting cavity 42; The single-needle assembly 60 includes a connecting needle 61 and a plastic part 62; In the assembled state, the plastic part 62 is embedded in the single needle assembly mounting cavity 42, the lower end of the electromagnet 50 is embedded in the electromagnet positioning mounting cavity 41, the upper convex skeleton body 80 of the skeleton 10 is fitted onto the electromagnet 50 at the corresponding position, the bottom of the lower convex pin 90 is inserted into the inner hole of the connecting pin 61, and the bottom outer circumference of the lower convex pin 90 is wrapped with enameled wire 20. One end of the enameled wire 20 is stably wrapped around the bottom outer circumference of the lower convex pin 90 by molten metal material 100, and one end of the enameled wire 100 is electrically connected to the inner hole wall of the connecting pin 61. The lower convex end of the connecting pin 61 is sealed with a cap 611.

[0012] In a specific embodiment, the bottom of the lower protruding pin 90 is a tapered shape that expands from bottom to top, and an annular groove 91 is provided at the lower part of the tapered area. A stop cone ring 92 is provided at the lower end of the tapered area. The enameled wire 20 is wound around the height area of ​​the annular groove 91 and is bottom-limited by the stop cone ring 92. The lower protruding pin 90 also includes an upper enameled wire through hole 93. The upper part of the lower protruding pin 90 corresponding to the annular groove 91 is provided with a notch or groove that connects to the enameled wire through hole 93. The notch or groove is located within the outer periphery of the lower protruding pin, so that the remaining part of the enameled wire 20 located on the lower protruding pin 90 does not protrude outward from the outer periphery of the lower protruding pin 90. A wire passage groove 94 is provided on the upper outer surface of the lower protruding pin 90 corresponding to the annular groove 91. The lower end of the wire passage groove 94 is connected to the upper part of the annular groove 91, and the upper end of the wire passage groove 94 is connected to the enameled wire through hole 93. The radial surface of the upper middle part of the lower protruding pin 90 is a vertical plane 901, and the through groove 94 is specifically a straight groove formed by recessing between the annular groove 91 and the enameled wire through hole 94. The concave depth of the wire groove is greater than the diameter of the enameled wire 20, ensuring that the entire portion of the enameled wire 20 wound and passing through the wire groove 94 does not protrude beyond the equivalent outer peripheral surface of the lower protruding pin 90. The through hole 93 of the enameled wire has an open structure corresponding to the radial position of the vertical plane 901. This allows the operator to directly lay the enameled wire 20 without threading it when it passes through this position, making the assembly of the enameled wire 20 convenient and quick. A central notch 95 is provided at the bottom of the lower protruding pin 90 corresponding to the inner post position of the annular groove 91. The central notch 95 passes through the stop cone ring 92 and is located at the lower end of the wire passage groove 94. This allows the enameled wire 20 to directly enter the enameled wire through hole 93 along the wire passage groove 94. Due to the central notch 95, when the conductive part formed by the combination of the enameled wire 20 and the molten metal material 100 contacts the inner wall of the connecting pin 61, the central notch 95 has a self-adjusting function. With external force, the outer part of the conductive part and the inner wall of the connecting pin 61 can be made to make tight and reliable contact.

[0013] After the lower end of the enameled wire is wrapped around the annular groove 91, the free end of the enameled wire enters the wire groove 94 through the central cut groove 95, and then sequentially passes through the enameled wire through hole 94 and enters the upper layer of the substrate of the skeleton. Then the enameled wire is wrapped around the upper convex skeleton body 80 and the electromagnet 90 and connected to the short needle 30. The connection position of the short needle 30 is also provided with molten metal material 100.

[0014] In a specific embodiment, the molten metal material 100 is specifically solder; The enameled wire 20 includes a central body and an insulating varnish on the outer surface. During the soldering process, the insulating varnish is reliably removed by the high temperature of the solder, which makes the conductive part formed by the combination of the enameled wire 20 and the solder have a reliable electrical connection.

[0015] In specific implementation, when the lower protruding end of the connecting pin 61 is a central hole structure, the central hole structure is blocked by welding to form a seal 611 to ensure a seal; When the bottom of the lower protrusion of the connecting pin 61 is a solid closed structure, the seal 611 is already formed when the connecting pin is made, and the lower protrusion of the connecting pin can be directly inserted, reducing the additional welding process.

[0016] Its working principle is as follows: The lower convex pin of the skeleton is extended so that the bottom of the lower convex pin is inserted into the inner hole of the connecting pin, and the bottom of the lower convex pin is wrapped with enameled wire. The enameled wire is electrically connected to the inner wall of the connecting pin through molten metal. The lower convex end of the connecting pin is sealed, which eliminates the need for a long pin. The electrical connection is made directly at the upper part of the connecting pin and the position where the enameled wire is wrapped around the lower convex pin. The other end of the enameled wire is wrapped around the upper convex skeleton body from bottom to top along the corresponding hole groove of the skeleton before connecting to the short pin. This effectively avoids the risk of the enameled wire breaking during assembly, ensuring that the solenoid valve can be assembled reliably and safely. Since no long pin is needed, it improves the assembly efficiency of the solenoid valve.

[0017] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0018] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A low-current solenoid valve, characterized in that, It includes: The skeleton includes a substrate, an upper protruding skeleton body, and a lower protruding pin; Enameled wire; Single stitch; The base includes an electromagnet positioning and mounting cavity and a single-needle assembly mounting cavity; Electromagnets; And a single-needle assembly, which includes a connecting needle and a plastic component; In the assembled state, the plastic part is embedded in the single-needle assembly mounting cavity, the lower end of the electromagnet is embedded in the electromagnet positioning mounting cavity, the skeleton is fitted onto the electromagnet at the corresponding position, the bottom of the protruding pin is inserted into the inner hole of the connecting pin, and the bottom outer circumference of the protruding pin is wrapped with enameled wire. One end of the enameled wire is stably wrapped around the bottom outer circumference of the protruding pin by molten metal material, and one end of the enameled wire is electrically connected to the inner wall of the connecting pin. The protruding end of the connecting pin is sealed.

2. The low-current solenoid valve according to claim 1, characterized in that: The bottom of the convex pin is a tapered shape that expands from bottom to top, and an annular groove is provided at the lower part of the tapered area. A stop cone ring is provided at the lower end of the tapered area. The enameled wire is wound around the height area of ​​the annular groove and is limited at the bottom by the stop cone ring.

3. A low-current solenoid valve according to claim 2, characterized in that: The lower protruding pin also includes an upper enameled wire through hole. The upper part of the lower protruding pin corresponding to the annular groove is provided with a notch or groove that connects to the enameled wire through hole. The notch or groove is located within the outer periphery of the lower protruding pin.

4. A low-current solenoid valve according to claim 3, characterized in that: The lower protruding pin has a wire guide groove on the upper outer surface of the annular groove. The lower end of the wire guide groove is connected to the upper part of the annular groove, and the upper end of the wire guide groove is connected to the through hole of the enameled wire.

5. A low-current solenoid valve according to claim 4, characterized in that: The radial surface of the upper middle part of the lower protruding pin is a vertical plane, and the wire groove is specifically a straight groove formed by recessing between the annular groove and the enameled wire through hole.

6. A low-current solenoid valve according to claim 4, characterized in that: The through hole for the enameled wire has an open structure corresponding to the radial position of the vertical plane.

7. A low-current solenoid valve according to claim 4, characterized in that: A central notch is formed at the bottom of the lower protruding pin corresponding to the inner column position of the annular groove. The central notch passes through the stop cone ring and is located at the lower end of the wire passage groove.

8. A low-current solenoid valve according to claim 1, characterized in that: The molten metal material is specifically solder.

9. A low-current solenoid valve according to claim 1, characterized in that: When the lower protruding end of the connecting pin has a central hole structure, the central hole structure is blocked by welding to form a seal.

10. A low-current solenoid valve according to claim 1, characterized in that: When the bottom of the lower convex end of the connecting pin is a solid closed structure, the seal is already formed during the manufacturing of the connecting pin.

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