WO2006125361A1

WO2006125361A1 - A coil component for an electromagnetic relay

Info

Publication number: WO2006125361A1
Application number: PCT/CN2006/000600
Authority: WO
Inventors: Junqing Wang
Original assignee: Xiamen Hongfa Electroacoustic Co., Ltd.
Priority date: 2005-05-19
Filing date: 2006-04-05
Publication date: 2006-11-30
Also published as: CN100361252C; CN1697112A

Abstract

A coil component for an electromagnetic relay relates to an electromagnetic relay which provides a coil component for the electromagnetic relay with a magneto-conductive component in shape of “C”. It is provided with a magneto-conductive component in form of “C”, an insulative bobbin, a coil and at least a pair of lead pins integrated with the bobbin, in which the coil is wounded on the bobbin. There are two free ends for each lead pin. One of the free ends is used as a pig tail for fetching out a relay coil, and the other one is used as a winding head end of a coil. By forming an integrated lead pin with the winding head end for a coil and the pig tail for fetching out a relay coil in the present art and molding the lead pin with the bobbin component, the process of welding a lead pad to a pig tail for fetching out a relay coil with a additional equipment can be omitted. So it can save equipment cost sharply, eliminate the hidden trouble of the rosin joint, simplify the process, increase the space for winding the coil, increase the magnetic efficiency of the coil, simplify the winding process, miniaturize the relay, reduce the material cost and effectively increase the reliability, the productive efficiency and the qualified rate of a relay.

Description

Coil component of electromagnetic relay

The present invention relates to an electromagnetic relay, and more particularly to an electromagnetic relay coil component having a c-shaped magnet, or a C-shaped magnet and a magnetic steel. Background technique .

Electromagnetic relays are widely used in automatic control equipment. Due to the development of technology, relay structures are required to be more compact, smaller in size, more sensitive, longer in service life and more reliable in operation. The utility model patent CN02217796 discloses an ultra-small high-sensitivity relay, which needs to be soldered together with the lead piece of the coil and the coil lead of the relay after the coil is wound and installed in the base, and then the armature part is assembled on the base. Thus, the assembly of the relay part is completed, which not only has the hidden danger of the solder joint of the coil lead-out solder joint, but also the coordination difference between the two is based on the electromagnetic system and the armature portion which are based on the base positioning, which makes the relay parameter tend to be larger. Unstable. The invention patent CN99101704 discloses an electromagnetic relay, which needs to weld the lead piece of the coil and the coil lead leg of the relay on the static spring frame after the whole winding of the base is completed after the coil is completed, and the coil lead-out method not only exists. In the next base injection molding process, the coil and the static spring frame need to be repositioned in the injection mold, which tends to cause the solder joint to be subjected to external force, which increases the possibility of solder joint falling off, and requires additional Processing equipment, processing technology is long and complicated. The invention patent application with the application number CN03141569 discloses an ultra-small high-sensitivity communication relay. Since the magnetic steel seat hole is arranged in the middle of the bobbin, the winding space of the coil is significantly reduced, which leads to a large magnetic circuit efficiency. The reduction makes the relay difficult to further miniaturize, and the winding process of the coil is complicated, that is, the winding of the magnetic steel in the middle of the bobbin is required in the winding process, which increases the production cost. Summary of the invention

The object of the present invention is to overcome the shortcomings of the prior art, and to provide a device that not only saves the input cost of the device in the production of the relay, but also simplifies the production process of the component, increases the winding space of the coil, improves the magnetic circuit efficiency, and simplifies the coil. The winding process, which further miniaturizes the relay, improves the reliability of the relay, and produces an efficiency and yield of an electromagnetic relay coil component with a C-shaped magnetically conductive component.

The object of the present invention is achieved as follows: The coil component of the electromagnetic relay is provided with a C-shaped magnetic conductive component, an insulating coil bobbin, a coil and at least one pair of lead legs; each of the lead legs has two free ends, one free end is The coil of the relay leads to the foot, and the other free end is the winding end of the coil; the lead legs are integrally connected with the bobbin, and each of them extends from the end to the outside of the bobbin; the coil is wound around the bobbin, and the leading ends of the coil are respectively wound It is attached to the end of the lead and is fixed by welding. The c-shaped magnetic conductive member is a C-shaped magnet or a C-shaped member composed of a magnetic steel and a magnet.

The c-shaped member composed of the magnetic steel and the magnetizer is composed of a magnetizer and a magnetic steel, and a pair of magnetic steels may be respectively disposed at two ends of the rod-shaped magnet, or a pair of magnets may be respectively disposed on the rod The two ends of the magnetic steel may also be a magnetic steel disposed in the middle of a C-shaped magnet.

The pair of lead pins can be provided with two pairs, and the two pairs of lead pins each have two free ends, one end is a coil lead of the relay, and the other end is a wrap end of the coil. When the coil is a single coil, one pair of coil lead legs only serves to support, position and the like during processing; when the coil is a double coil, the functions of the two pairs of coil lead legs are the same.

When the c-shaped magnetic conductive member is a magnetic steel and a magnetic conductive body, the insulating material of the insulating bobbin can be integrally connected, and the insulating material encloses the remaining portion except the pole faces of the c-shaped member composed of the magnetic steel and the magnetizer. It is also possible to leave a magnetizer or a magnet seat hole at both ends of the insulated bobbin or at the center of the coil, in which the magnetizer or magnet is placed.

The insulated coil bobbin comprises two end panels and a connecting portion integrally formed; the c-shaped magnetic conductive component is disposed in the insulated coil bobbin, and the two pole faces are extended from the end panel portion to the outside of the insulating coil bobbin; A coil accommodating space is formed therebetween; the lead pins are respectively integrally molded with the end plates of the coil bobbin.

A magnetizer or a magnet seat hole is left at the end plates or joints of the insulated bobbin, and a magnet or a magnet is placed in the hole. '

The insulated coil bobbin is provided with at least two end plates respectively covering the portions below the two pole faces of the c-shaped magnet, and an insulating layer is coated on the surface of the C-shaped magnet, and a coil accommodating space is formed between the two ends of the insulating coil frame. The lead pins are integrally molded with the end plates of the bobbin.

The lead legs are on the same frame before the coil is wound. The frame is stamped from a conductive metal strip that can be stamped into a series of frames and joined together. The frame is cut after the c-shaped magnetic conductive member and the lead leg composed of the magnetic steel and the magnetic conductive body are integrally molded into the bobbin, thereby obtaining not less than two lead pins; or the lead pins are independent parts, and the insert is injection molded. In the coil holder.

When the C-shaped magnetic conductive member is a C-shaped magnetic conductive body, the insulating material of the insulating bobbin can be integrally connected, and the insulating material encloses the remaining portions except the two-pole faces of the c-shaped magnetic conducting body.

The lead legs are on the same frame before the coil is wound. The frame is stamped from a conductive metal strip that can be stamped into a series of frames and joined together. The frame is cut after the C-shaped magnet and the lead leg are integrally molded into the bobbin, thereby obtaining not less than two lead pins; or the lead pins are independent parts, and are inserted into the injection molded bobbin.

The coils are taken out by winding the two or four terminals of the coil around the ends of the leading ends of the lead and then welding them together.

The C-shaped magnetic conductive member composed of a magnetic steel and a magnetic conductive magnet or the C-shaped magnetic conductive member composed of a C-shaped magnetic conductive magnet according to the present invention can be applied to an electromagnetic relay, and the electromagnetic relay includes a cover, an armature member, and a coil component. Injection molding with static spring Contact base component. The coil component comprises a c-shaped magnetic conductive component and an insulated coil bobbin composed of a magnetic steel and a magnetizer or a c-shaped magnet, and a coil is wound around the coil bobbin, and the armature component includes an armature and is disposed on the armature side. At least one moving reed and an insulating material for injecting them together, the coil component further comprises a lead leg which is injection molded together, the lead leg has two free ends, one end is a coil lead leg of the relay, and the other end is a wrap end of the coil .

Compared with the prior art, the present invention has the advantages that the coil winding end of the prior art and the coil lead leg of the relay are arranged as an integrated lead leg, and are molded together with the bobbin component, which is omitted. The additional production process of connecting the lead piece and the lead-out foot together significantly saves the input cost of the device, eliminates the hidden soldering hazard, greatly simplifies the relay production process, and improves the coil winding space and improves The magnetic efficiency of the coil simplifies the coil winding process, which further reduces the size of the relay, reduces the material cost of the product, and effectively improves the operational reliability, production efficiency and yield of the relay, which is beneficial to large-scale Production line operations.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing the structure of a first embodiment of the present invention.

Figure 2 is a schematic view showing the structure of the other side of Figure 1.

Figure 3 is a cross-sectional view of an embodiment of the present invention.

4 is a schematic view showing the structure of a lead pin in the embodiment of the present invention.

Figure 5 is a schematic view of a lead strip material in an embodiment of the present invention.

Figure 6 is a cross-sectional view showing a second embodiment of the present invention.

Figure 7 is a cross-sectional view showing a third embodiment of the present invention.

Figure 8 is a cross-sectional view showing a fourth embodiment of the present invention.

Figure 9 is a cross-sectional view showing a fifth embodiment of the present invention.

Figure 10 is a schematic view showing the structure of Embodiment 6 of the present invention.

Figure 11 is a perspective view of a base of an embodiment of an electromagnetic relay to which the present invention is applied.

Figure 12 is a structural exploded view of an embodiment of an electromagnetic relay to which the present invention is applied. detailed description

The invention will now be further described with reference to the accompanying drawings.

Example 1

As shown in Fig. 1, Fig. 2 and Fig. 3, the present invention is provided with a C-shaped member 11 composed of a magnetizer 11c wound around an insulating bobbin 12, and the lead pins 14, 15 are molded together with the insulating bobbin 12. The lead legs 14, 15 have two free ends, one free end 14a, 15a being the coil take-up leg of the relay and the other free end 14b, 15b being the wrap-around end of the coil. When the coil 13 is a single coil, the lead pin 15 functions as a support during positioning, positioning, etc.; the coil 13 is a double coil. When it is the same as the lead pin 14.

In FIG. 3, the insulating bobbin 12 includes a pair of end plates and a connecting portion integrally formed; and the remaining portions except the two-pole faces 11a and 11b of the C-shaped magnetizer 11 are wrapped, and the two-pole faces 11a and 11b are formed by the end plate portions. Extending to the outside of the insulated bobbin 12;

The coil 13 is taken out by winding the leading ends of the coils 13 around the leading end ends 14b and/or 15b and then welding them together. The coil 13 may be one or two.

As shown in Figures 4 and 5, the lead leg 14 of the present invention includes two free ends, one free end 14a being the coil take-up leg of the relay and the other free end 14b being the wrap-around end of the coil. The bow I leg 14 is formed on the same frame 17 before winding the coil 13, and the frame is stamped from a conductive metal strip which can be stamped into a series of frames 17 and joined together. The frame 17 is cut after the C-shaped magnet 11 and the lead pins 14 are integrally molded with the insulating bobbin 12, thereby obtaining not less than two lead pins 14.

Alternatively, the lead legs 14 are assembled to the insulated bobbin 12 using separate parts.

Example 2

Figure 6 shows another embodiment of the present invention. The insulating bobbin 12 is not integral and includes two end plates 12a, 12b respectively enclosing the portions below the pole faces 11a, lib of the C-shaped magnet 11 The C-shaped magnet 11 has two pole faces 11a, 11b and a middle portion thereof which are not covered by an insulating material, but is wrapped with another insulating material 16 in the middle of the C-shaped magnetizer 11, or may be in a C-shaped guide. The surface of the magnet 11 is coated with an insulating layer.

Example 3

Fig. 7 shows another embodiment of the present invention. The two ends of the insulating coil bobbin 12 or the center of the coil are provided with a magnetizer 11c or a magnetic steel lid hole, and the magnetizer 11c or the magnetic steel lid is in the subsequent process. Place it in the hole in the hole. It is also possible to replace the C-shaped member 11 composed of the magnetic steel lid and the magnetizer 11c with a C-shaped magnetizer 11 composed of several parts, and the C-shaped magnet 11 is divided into portions resembling the above-mentioned magnetic steel lid and the magnetizer 11c. . It is also possible to form the bobbin 12 by welding the magnetizer 11c and the magnet steel lid together.

Example 4

Fig. 8 shows another embodiment of the present invention, in which a magnetic steel lid is disposed at a substantially central portion of the C-shaped magnet 11c to form a C-shaped member 11, and the insulating bobbin 12 encloses the C-shaped member, exposing only two of the magnets 11c. The pole faces 11a, lib, and the coil 13 are wound around the bobbin 12 to form the coil component 1.

Example 5

Fig. 9 shows another embodiment of the present invention. The two ends of the insulating bobbin 12 or the center of the coil are provided with a magnetizer 11c or a magnetic steel lid hole, and the magnetizer 11c or the magnetic steel lid is in the subsequent process. Place it in the hole in the hole. It is also possible to replace the C-shaped member 11 composed of the magnetic steel lid and the magnetizer 11c into a C-shaped magnetizer 11 composed of several parts. Therefore, the C-shaped magnet 11 is divided into portions resembling the above-described magnetic steel lid and the magnetizer 11c. It is also possible to form the bobbin 12 by welding the magnetizer 11c and the magnetic steel lid together.

Example 6

Figure 10 shows another embodiment of the present invention in which an insulated bobbin 12 is injection molded from a C-shaped member 11, a coil 13 wound around an insulating bobbin 12, and a lead leg 14 and an insulating bobbin 12 are injection molded together. There are two free ends, one free end 14a is the coil take-up foot of the relay, the other free end 14b is the wrap end of the coil, and the two lead ends are L-shaped.

The parts not described in the examples 2 to 6 are similar to the embodiment 1.

As shown in Figures 11 and 12, an embodiment of a relay to which the present invention is applied is shown. The electromagnetic relay includes a casing 4, an armature member 3, and a contact for injection molding the coil member 1 and the static spring frame strip 20 together. Base member 2. The coil component 1 includes a C-shaped component 11 and an insulated bobbin 12 which are injection-molded together, and a coil 13 is wound around the bobbin 12. The armature component 3 includes an armature and a pair of movable springs disposed on the armature side and molds them together. The insulating material, the coil component 1 further comprises lead pins 14 and/or 15 which are injection molded together, the arch I leg 14 has two free ends, one end 14a is the coil lead leg of the relay, and the other end 14b is the wrap end of the coil, The lead pin 15 can play the role of support, positioning and the like during the processing. Depending on the embodiment, the magnetic steel may be disposed on the coil component 1 or may be disposed on the armature component 3. Industrial applicability

The coil component of the electromagnetic relay of the present invention is provided with a C-shaped magnetic conductive component, an insulated coil bobbin, a coil and at least one pair of lead legs integrally connected with the bobbin, each of which has two free ends, one The free end is the coil of the relay, and the other free end is the winding end of the coil. The invention has the advantages of ingenious design, simple production and processing, large-scale industrial production, and good industrial applicability.

Claims

A coil component of an electromagnetic relay, comprising: a c-shaped magnetic conductive component, an insulated coil bobbin, a coil and at least one pair of lead pins; each of the lead pins has two free ends, and one free end is The coil of the relay leads to the foot, and the other free end is the winding end of the coil; the lead legs are integrally connected with the bobbin, and each of them extends from the end to the outside of the bobbin; the coil is wound around the bobbin, and the leading ends of the coil are respectively wound It is attached to the end of the lead and is fixed by welding.

A coil component for an electromagnetic relay according to claim 1, wherein said C-shaped magnetic conductive member is a C-shaped magnet.

3. The coil component of an electromagnetic relay according to claim 1, wherein said C-shaped magnetic conductive member is composed of a magnetizer and a magnetic steel, and may be a pair of magnetic steels respectively disposed on the rod-shaped magnet. At both ends, a pair of magnets may be respectively disposed at two ends of the rod-shaped magnetic steel, or a magnetic steel may be disposed at a middle portion of a C-shaped magnet.

4. The coil component of an electromagnetic relay according to claim 1, wherein said lead pins are provided in two pairs, and the two pairs of lead pins each have two free ends, one end of which is a coil lead of the relay, and the other end It is the wrap end of the coil.

The coil component of an electromagnetic relay according to claim 1 or 2 or 3 or 4, wherein said insulated bobbin comprises a pair of end plates and a connecting portion integrally formed; the C-shaped magnetic conductive member is disposed at In the insulated coil bobbin, the two pole faces extend from the panel portions at both ends to the outside of the insulated coil bobbin; a coil accommodating space is formed between the two ends of the insulating bobbin; the lead legs are respectively integrally molded with the two end panels of the bobbin.

6. The coil component of an electromagnetic relay according to claim 5, wherein a magnetizer or a magnet seat hole is left at the end plate or the connecting portion of the insulating bobbin, and a magnet or a magnet is placed in the seat hole. in.

7. The coil component of an electromagnetic relay according to claim 1 or 2, wherein the insulating bobbin is provided with at least two end plates, respectively enclosing a portion below the two pole faces of the C-shaped magnet, in a C-shaped guide The surface of the magnet is coated with an insulating layer, and a coil accommodating space is formed between the two ends of the insulating coil frame, and the lead legs are respectively integrally molded with the two end plates of the coil bobbin.

8. A coil component for an electromagnetic relay according to claim 1 or 3, wherein the insulating bobbin is provided with at least two end plates, respectively wrapped around the pole faces of the C-shaped member formed of the magnetic steel and the magnetizer. a portion, that is, a C-shaped member composed of a magnetic steel and a magnetizer has two pole faces and a middle portion not covered by the insulating material, and an insulating layer is coated on the surface of the C-shaped member composed of the magnetic steel and the magnetizer; A coil accommodating space is formed between the two end panels, and the lead pins are integrally molded with the two end plates of the coil bobbin.

9. The coil component of an electromagnetic relay according to claim 1, wherein a pair of lead legs are on the same frame before winding the coil, the frame is stamped from a conductive metal strip, and the frame is in a C shape. The lead magnet and the lead leg are integrally molded by the insulated bobbin and then cut, thereby obtaining not less than two lead pins.

A coil component for an electromagnetic relay according to claim 1 or 4, wherein two or four leading ends of the coil are respectively wound around the leading end of the lead pin and fixed by welding.