Coil assembling structure of low-current electromagnetic valve

Abstract

The invention provides a coil assembly structure of a low-current electromagnetic valve, which effectively avoids the risk of breakage of an enameled wire in the assembly process and ensures that the electromagnetic valve can be reliably and safely assembled. The structure comprises a framework, the framework comprises a substrate, an upper convex framework body and a lower convex pin, the lower part of the lower convex pin is provided with a long needle positioning hole, and the upper part of the lower convex pin is provided with an enameled wire through hole; an enameled wire; a long needle; and a short needle; an inner groove is formed in the outer circumference, corresponding to the long needle positioning hole, of the lower convex pin, an inner concave ring groove is further formed in the height area, corresponding to the inner groove, of the outer circumference of the lower convex pin, the inner concave depth of the inner concave ring groove is larger than the diameter of an enameled wire, and the inner concave ring groove is communicated with the inner groove; the inner groove is communicated with the long needle positioning hole, the top of the long needle is fixedly inserted into the long needle positioning hole, and a part of the surface area of the long needle is exposed through the inner groove to form an exposed area.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas flameout protection device, in particular to a coil assembly structure of low current electromagnetic valve. BACKGROUND

[0002] The electromagnetic valve in the gas stove flameout protection device can timely cut off the gas source after the stove is accidentally extinguished. At present, the electromagnetic valve for this purpose is divided into two types from the power supply mode. One is directly powered by a thermocouple, and the other is powered by a battery. The latter has become the first choice for high-end gas stoves because it can be controlled to close the valve at any time. This type of electromagnetic valve uses a battery for power supply, which determines that it must have very low power consumption. Therefore, the coil used in this type of electromagnetic valve generally has a large resistance and a very low working current. In order to achieve a large resistance in a limited electromagnetic valve size, the coil must use very thin enameled wire, such as enameled wire with a diameter of 0.03mm.

[0003] The structure of this low current electromagnetic valve coil is generally divided into a skeleton, enameled wire, a long needle and a short needle, as shown in Figure 1 When the coil is assembled, the enameled wire is wound on the main body of the skeleton, and the two ends of the enameled wire are wound on the long needle and the short needle respectively, and finally tin is welded at the two needle winding positions, as shown in Figure 1 The position of the long needle and the enameled wire winding and soldering is located in the exposed area at the lower end of the lower protruding pin of the skeleton. The upper part of the long needle is inserted into the guide hole of the lower protruding pin. The lower part of the long needle is wrapped and soldered by the enameled wire. Then the enameled wire enters the guide groove of the lower protruding pin through a transition lead 1. The transition lead 1 is located between the bottom of the lower protruding pin and the soldering area. Since the long needle and the lower protruding pin need to pass through the through hole of the electromagnetic valve base during assembly, the transition lead 1 is located radially outside the long needle. During actual assembly, the transition lead and the through hole may be scratched, and the very thin enameled wire may be broken. When the enameled wire is broken, the entire electromagnetic valve cannot work, and the gas stove flameout protection device fails. Therefore, it is urgent to develop a coil assembly structure suitable for this type of low current electromagnetic valve to avoid the above risks. SUMMARY

[0004] In view of the above problems, the present application provides a coil assembly structure of low current electromagnetic valve, which effectively avoids the risk of enameled wire breakage during assembly, and ensures reliable and safe assembly of the electromagnetic valve.

[0005] A coil assembly structure of low current electromagnetic valve, characterized in that it comprises: a skeleton comprising a base plate, an upper protruding skeleton body and a lower protruding pin, the lower part of the lower protruding pin is provided with a long needle positioning hole, and the upper part of the lower protruding pin is provided with an enameled wire through hole; enameled wire; long needle; and short needle; The outer periphery of the lower protruding pin is provided with an inner groove corresponding to the long needle positioning hole. The outer periphery of the lower protruding pin is further provided with an inner recessed ring groove corresponding to the height area of the inner groove. The inner recessed depth of the inner recessed ring groove is greater than the diameter of the enameled wire. The inner recessed ring groove is connected to the inner groove, and the inner groove is connected to the long needle positioning hole. The top of the long needle is fixedly inserted into the long needle positioning hole, and a part of the long needle is exposed through the inner groove to form an exposed area. The bottom of the enameled wire is wound in the inner recessed ring groove and is deeply inserted into the enameled wire through hole through the via hole or the via groove. Then, the enameled wire is wound around the outer periphery of the upper protruding skeleton body and is connected to the corresponding connecting end of the short needle. The bottom of the enameled wire and the exposed area of the long needle form an electrical connection. The via hole or the via groove is located in the equivalent outer periphery area of the lower protruding pin.

[0006] It is further characterized in that: The bottom of the enameled wire is wound from bottom to top in the inner recessed ring groove. The contact part of the enameled wire and the exposed area of the long needle is connected by soldering. The soldering area after soldering does not protrude radially outward from the corresponding position equivalent outer periphery surface of the lower protruding pin; The surface of the lower protruding pin away from the soldering area is provided with a wire passing groove. The lower end of the wire passing groove is connected to the upper part of the inner recessed ring groove. The upper end of the wire passing groove is connected to the enameled wire through hole. The enameled wire enters the enameled wire through hole through the wire passing groove; The surface of the lower protruding pin away from the soldering area is a vertical plane. The wire passing groove is a straight line groove formed in the inner recessed ring groove and the enameled wire through hole; The inner recessed depth of the wire passing groove is greater than the diameter of the enameled wire, which ensures that the whole part of the enameled wire wound and passing through the wire passing groove does not protrude outward from the equivalent outer periphery surface of the lower protruding pin; The enameled wire through hole corresponding to the radial position of the vertical plane is an open structure, which enables the operator to directly wire the enameled wire without threading when the enameled wire passes through the position, so that the operation can be carried out by directly wiring the enameled wire, making the assembly of the enameled wire convenient and fast; The enameled wire is wound around the outer periphery of the upper protruding skeleton body and is connected to the corresponding connecting end of the short needle. The inner end of the short needle is inserted into the corresponding short needle mounting hole of the substrate. The part connected by the short needle and the enameled wire is subjected to soldering operation; The long needle positioning hole is arranged eccentrically relative to the lower protruding pin. The center axis of the long needle positioning hole is arranged to deviate from the soldering area, which makes the excavation depth of the inner groove relatively small, ensuring the stability and reliability of the whole skeleton; The enameled wire includes a center body and an insulating paint on the outer surface, and during soldering, the insulating paint is reliably removed due to high temperature of the soldering, which makes the position of the enameled wire provided with the soldering have reliable electrical connection.

[0007] After the scheme of the application is adopted, an inner groove is opened in the side area of the lower protruding pin of the skeleton, and a ring groove is also made, the inner groove is communicated with the long needle positioning hole, so that a part of the inserted long needle is exposed through the inner groove to form an exposed area, the enameled wire is wound in the ring groove while contacting the exposed area of the long needle, and the bottom winding part of the enameled wire and the exposed area of the long needle form electrical connection, and since the inner depth of the inner groove is greater than the diameter of the enameled wire, the enameled wire does not protrude outward from the equivalent outer peripheral surface of the lower protruding pin when winding, and the via hole or via groove is located in the equivalent outer peripheral area of the lower protruding pin, so that the part of the enameled wire that does not protrude outward from the equivalent outer periphery of the lower protruding pin is avoided, which completely eliminates the possibility of contact and scratching of the enameled wire during assembly of the skeleton, the long needle and the electromagnetic valve base and the single needle assembly; the risk of breakage of the enameled wire during assembly is effectively avoided, and reliable and safe assembly of the electromagnetic valve is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 It is a side view of the assembly structure of the electromagnetic valve coil of the prior art; Figure 2 It is a front view of a specific embodiment of the application; Figure 3 It is a side view of a specific embodiment of the application; Figure 4 It is a perspective view of the assembly of the skeleton and the long needle and the short needle of the application Figure 1 ; Figure 5 It is a perspective view of the assembly of the skeleton and the long needle and the short needle of the application Figure 2 ; Figure 6 It is a sectional view of the assembly of the skeleton and the long needle and the short needle of the application; The names corresponding to the serial numbers in the figure are as follows: skeleton 10, enameled wire 20, long needle 30, exposed area 31, short needle 40, base plate 50, upper protruding skeleton body 60, lower protruding pin 70, vertical plane 701, long needle positioning hole 71, enameled wire through hole 72, open structure 721, inner groove 73, inner ring groove 74, wire slot 75, first soldering area 80, second soldering area 90. DETAILED DESCRIPTION

[0009] A coil assembly structure of a low-current electromagnetic valve, see Figures 2-6 , which includes a skeleton 10, an enameled wire 20, a long needle 30, and a short needle 40; The skeleton 10 comprises a base plate 50, an upper convex skeleton body 60, and a lower convex pin 70, the lower part of the lower convex pin 70 is provided with a long needle positioning hole 71, and the upper part of the lower convex pin 70 is provided with an enameled wire through hole 72; An inner groove 73 is opened on the outer circumference of the lower convex pin 70 corresponding to the long needle positioning hole 71, and an inner concave ring groove 74 is further provided on the outer circumference of the lower convex pin 70 corresponding to the height area of the inner groove 73, the inner concave depth of the inner concave ring groove 74 is greater than the diameter of the enameled wire 20, the inner concave ring groove 74 is communicated with the inner groove 73, the inner end of the inner groove 73 is communicated with the long needle positioning hole 71, the top of the long needle 30 is fixedly inserted into the long needle positioning hole 71, and a part of the surface area of the long needle 30 is exposed through the inner groove 73 to form an exposed area 31, the bottom of the enameled wire 20 is wound in the inner concave ring groove 74 and deeply enters the enameled wire through hole 72 through the via or the slot, then the enameled wire 20 is wound on the outer circumference of the upper convex skeleton body 50 and connected to the corresponding connecting end of the short needle 40, and the bottom winding part of the enameled wire 20 and the exposed area of the long needle form an electrical connection; The via or the slot is located in the equivalent outer circumferential area of the lower convex pin 70.

[0010] In specific embodiments, the inner groove 73 is a trapezoidal groove opened from one side of the long needle positioning hole 71, the upper base and the lower base of the trapezoidal groove are arranged parallel to the length direction of the long needle positioning hole, and the two waists of the trapezoidal groove are straight edges that taper inward from the outside, which makes the winding of the enameled wire 20 smooth and fast.

[0011] In specific embodiments, the bottom of the enameled wire 20 is wound in the inner concave ring groove 74 from bottom to top, and the contact part of the enameled wire 20 and the exposed area 31 of the long needle 30 is connected by soldering, and the first soldering area 80 after soldering is not radially convex outward from the corresponding position equivalent outer circumferential surface of the lower convex pin 70.

[0012] In specific embodiments, the structure of the via or the slot is a wire passing slot 75, and the surface of the lower convex pin 70 away from the first soldering area 80 is provided with a wire passing slot 75, the lower end of the wire passing slot 75 is communicated to the upper part of the inner concave ring groove 74, the upper end of the wire passing slot 75 is communicated to the enameled wire through hole 72, and the enameled wire 20 enters the enameled wire through hole 72 through the wire passing slot 75.

[0013] In specific embodiments, the surface of the lower convex pin 70 away from the first soldering area 80 is a vertical plane 701, and the wire passing slot 75 is a straight line groove formed in the inner concave ring groove 74 and the enameled wire through hole 72; The inner concave depth of the wire passing slot 75 is greater than the diameter of the enameled wire 20, which ensures that the whole part of the enameled wire 20 wound and passing through the wire passing slot 75 is not convex outward from the equivalent outer circumferential surface of the lower convex pin 70; The radial position of the lacquered wire through hole 72 corresponding to the vertical plane 701 is an open structure 721, which enables the lacquered wire 20 to be directly routed without threading when the operator operates, so that the assembly of the lacquered wire 20 is convenient and fast; After the lacquered wire 20 is wound around the outer periphery of the upper convex skeleton body 60, the lacquered wire 20 is connected to the corresponding connecting end of the short needle 40, the inner end of the short needle 40 is inserted into the corresponding short needle mounting hole of the substrate 50, and the part where the short needle 40 and the lacquered wire 20 are connected is subjected to a soldering operation to form a second soldering area 90; The long needle positioning hole 71 is eccentrically arranged relative to the lower convex pin 70, the center axis of the long needle positioning hole 71 is offset to the first soldering area 80, which makes the excavation depth of the inner groove 73 relatively small, and ensures the stability and reliability of the entire skeleton 10.

[0014] In specific implementation, the lacquered wire 20 includes a center body and an insulating lacquer on the outer surface, and during soldering, the insulating lacquer is reliably removed due to the high temperature of soldering, which enables the position of the lacquered wire 20 provided with soldering to have reliable electrical connection.

[0015] The principle is as follows: an inner groove is opened in the side area of the lower convex pin of the skeleton, and a ring groove is also made, the inner groove is communicated with the long needle positioning hole, so that a part of the exposed area of the inserted long needle is exposed through the inner groove to form an exposed area, the lacquered wire is wound in the ring groove while contacting the exposed area of the long needle, and the bottom of the lacquered wire is electrically connected with the exposed area of the long needle, and since the inner groove depth of the inner groove is greater than the diameter of the lacquered wire, the lacquered wire does not protrude outward from the equivalent outer periphery surface of the lower convex pin when being wound, and the via or the groove is located in the equivalent outer periphery area of the lower convex pin, so that the part of the lacquered wire that does not protrude outward from the equivalent outer periphery of the lower convex pin is avoided, which completely eliminates the possibility of contact and scratching of the lacquered wire during assembly of the skeleton, the long needle and the electromagnetic valve base and the single needle assembly; the risk of breakage of the lacquered wire during assembly is effectively avoided, and the reliable and safe assembly of the electromagnetic valve is ensured.

[0016] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to encompass all changes falling within the meaning and range of equivalents of the elements of the claims. Any reference signs in the claims should not be considered as limiting the claims involved.

[0017] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature or implementation described herein. The specification can include implicit combinations of explicitly mentioned features and / or implicit combinations of implicitly mentioned features. Such combinations are also expressly included within the scope of the specification and an embodiment.

Claims

1. A coil assembly structure for a low-current solenoid valve, characterized in that, It includes: The skeleton includes a substrate, an upper convex skeleton body, and a lower convex pin. The lower part of the lower convex pin is provided with a long pin positioning hole, and the upper part of the lower convex pin is provided with an enameled wire through hole. Enameled wire; Long needle; And single needles; The lower convex pin has an inner groove on its outer circumference corresponding to the long needle positioning hole. The lower convex pin also has an inner concave annular groove on its outer circumference corresponding to the height area of ​​the inner groove. The inner depth of the inner concave annular groove is greater than the diameter of the enameled wire. The inner concave annular groove is connected to the inner groove and the inner groove is connected to the long needle positioning hole. The top of the long needle is fixedly inserted into the long needle positioning hole, and a part of the surface area of ​​the long needle is exposed through the inner groove to form an exposed area. The bottom of the enameled wire is wound in the inner concave annular groove and penetrates into the enameled wire through hole through a through hole or through groove. Then the enameled wire is wound around the outer circumference of the upper convex skeleton body and connected to the corresponding connection end of the short needle. The bottom wound part of the enameled wire and the exposed area of ​​the long needle form an electrical connection. The via or slot is located within the equivalent outer peripheral region of the lower convex pin.

2. The coil assembly structure of a low-current solenoid valve according to claim 1, characterized in that: The bottom of the enameled wire is wound around the concave annular groove from bottom to top, and the contact portion of the exposed area of ​​the enameled wire and the long needle is connected by solder. The soldered area does not bulge radially outward from the corresponding position of the lower protruding pin on the equivalent outer peripheral surface.

3. The coil assembly structure of a low-current solenoid valve according to claim 1, characterized in that: A wire guide groove is provided on the surface of the lower protruding pin away from the solder area. The lower end of the wire guide groove is connected to the upper part of the concave annular groove, and the upper end of the wire guide groove is connected to the enameled wire through hole. The enameled wire enters the enameled wire through hole after passing through the wire guide groove.

4. The coil assembly structure of a low-current solenoid valve according to claim 3, characterized in that: The surface of the lower protruding pin away from the solder area is a vertical plane, and the wire groove is specifically a straight groove formed between the concave annular groove and the enameled wire through hole.

5. The coil assembly structure of a low-current solenoid valve according to claim 4, characterized in that: The concave depth of the wire groove is greater than the diameter of the enameled wire.

6. The coil assembly structure of 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. The coil assembly structure of a low-current solenoid valve according to claim 1, characterized in that: The enameled wire is wound around the outer periphery of the upper convex skeleton body and connected to the corresponding connecting end of the short needle. The inner end of the short needle is inserted into the corresponding short needle mounting hole of the substrate. The part where the short needle and the enameled wire are connected is soldered.

8. The coil assembly structure of a low-current solenoid valve according to claim 1, characterized in that: The long needle positioning hole is eccentrically arranged relative to the lower protruding pin, and the central axis of the long needle positioning hole is offset towards the solder area.

9. The coil assembly structure of a low-current solenoid valve according to claim 1, characterized in that: The enameled wire includes a central body and an insulating varnish on the outer surface.

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