A small electromagnetic relay with horizontal magnetic circuit

Abstract

The present invention discloses a small electromagnetic relay with a horizontal magnetic circuit, including a coil, an iron core, a yoke, an armature and a coil pin; two coil pins are respectively inserted and matched in the flange at one end of the coil frame with the iron core pole surface; the coil pin is a sheet structure punched into a Z-shaped shape by a copper strip, including an upper section, a middle section and a lower section, and the upper section is vertically upward, the lower section is vertically downward, and the middle section is horizontally connected between the bottom end of the upper section and the top end of the lower section; the flange at one end of the coil frame is provided with two oblique horizontal grooves for matching the middle section of the coil pin. The present invention can meet the demand for smaller lead-out pin spacing and the upper magnetic circuit part does not need to bend the winding head to rewind and reposition the space, which can reduce the process steps and improve efficiency; at the same time, the pole shoe working surface of the magnetic circuit can be given up to the maximum, thereby improving the suction performance of the relay magnetic circuit.

Description

Technical Field

[0001] The invention relates to the technical field of relays, and in particular to a small electromagnetic relay with a horizontal magnetic circuit. Background Art

[0002] A relay is an electronic control device that has a control system (also called an input circuit) and a controlled system (also called an output circuit). It is usually used in automatic control circuits. It is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic adjustment, safety protection, and circuit conversion in the circuit. One type of electromagnetic relay in the prior art adopts a horizontal magnetic circuit, that is, the axis of the coil core hole is vertically arranged to the lead pin. When the spacing between the coil lead pins is required to be narrow, if the coil pins are designed as a straight-through type, they will directly penetrate the upper half of the wire rack. This design will reduce the working surface of the pole shoe surface of the yoke and armature in the magnetic circuit. It limits the magnetic circuit suction of the relay and reduces the performance of the relay. In addition, there is insufficient space for winding the coil winding head.

[0003] The prior art usually uses wire as the material for the coil lead pins, and achieves a smaller lead pin spacing by bending the wire. This technology increases the production process because the wire needs to be bent. Since the lead pin parts are small (applied to small relays), it is difficult to ensure the dimensional accuracy after bending, and it is easy to interfere with the base pin holes, resulting in poor assembly and scraping. This solution of the prior art also has another disadvantage. The distance between the upper part of the coil pin and the coil frame is relatively close, and there is not enough space for the position. Therefore, when winding the head, the coil terminal in the upper part needs to be bent first and then the enameled wire is wrapped around the head, and finally straightened after the winding is completed. This method not only has a complicated and cumbersome production process, but also affects production efficiency. Moreover, when the terminal is straightened, it is easy to damage or even break the enameled wire, resulting in fatal defects. Summary of the invention

[0004] The object of the present invention is to provide a small electromagnetic relay with a horizontal magnetic circuit. Through structural improvement, it can meet the demand for smaller lead pin spacing and the need to make room for the upper magnetic circuit part to not need to bend the winding head and rewind it, thereby reducing the number of process steps and improving efficiency; at the same time, it can make room for the pole shoe working surface of the magnetic circuit to the maximum, thereby improving the suction performance of the relay magnetic circuit.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a small electromagnetic relay with a horizontal magnetic circuit, including a coil, an iron core, a yoke, an armature and a coil pin; the coil includes a coil frame and an enameled wire wound around a winding window of the coil frame; the iron core hole of the coil frame is horizontally arranged, the iron core is inserted into the iron core hole of the coil frame and a pole surface is provided at one end of the coil frame; the coil frame includes a winding shaft and flanges at both ends of the winding shaft, and the winding window is surrounded by the two flanges and the winding shaft; two coil pins are respectively inserted and matched in the flange at one end of the coil frame with the iron core pole surface; the yoke cooperates with the coil, and the armature is at the flange at one end of the coil frame. The outer part cooperates with one end of the yoke iron; the coil pin is a sheet structure punched into a Z-shaped shape by a copper strip, including an upper section, a middle section and a lower section, and the upper section is vertically upward, the lower section is vertically downward, and the middle section is horizontally connected between the bottom end of the upper section and the top end of the lower section; the flange at one end of the coil frame is provided with two oblique horizontal grooves for cooperating with the middle section of the coil pin, so that when the middle sections of the two coil pins are respectively adapted to the two oblique horizontal grooves of the flange at one end of the coil frame, the distance between the upper sections of the two coil pins is greater than the distance between the lower sections of the two coil pins, so as to utilize the oblique setting of the two coil pins to provide the largest pole shoe matching surface for the yoke and the armature.

[0006] In the flange at one end of the coil frame, protrusions are integrally extended outward in the length direction at both sides of the width, and the two oblique horizontal grooves are respectively arranged on the bottom surfaces of the two protrusions.

[0007] The angle between the projection of the oblique horizontal groove on the horizontal plane and the projection of the axis of the core hole on the horizontal plane is greater than 0 degrees and less than 90 degrees.

[0008] In the protrusion, at the outer end corresponding to the oblique horizontal groove, there is also a vertically transparent insertion groove, and the bottom end of the insertion groove is connected to the oblique horizontal groove; the lower part or the middle and lower part of the upper section of the two coil pins are respectively matched in the insertion groove, so that the upper sections of the two coil pins are farther away from the flange at one end of the coil frame relative to the lower sections of the two coil pins in the length direction of the coil frame, thereby providing sufficient space for the winding of the enameled wire.

[0009] The two protrusions are respectively provided with notches on opposite inner sides, and one end of the yoke is adapted between the two notches.

[0010] The upper part of the upper section of the coil pin is set as a coil winding head and is exposed outside the protrusion.

[0011] A barb structure is also provided at the lower part or the lower middle part of the upper section of the coil pin to prevent the upper section of the coil pin from being withdrawn after being inserted into the insertion slot of the protrusion.

[0012] The barb structure is arranged on one or both sides of the width of the lower part or the lower middle part of the upper section of the coil pin.

[0013] The middle section of the coil pin is provided with a convex bump outwardly in the thickness direction, so as to achieve an interference fit when the middle section of the coil pin is matched with the oblique horizontal groove.

[0014] The lower section of the coil pin is set as a lead pin.

[0015] Furthermore, it also includes a base, a push card, a movable spring and a static spring; the coil frame is installed in the base, the yoke is L-shaped, one side of the L-shaped yoke is connected to the iron core at the other end of the coil frame, and the other side of the L-shaped yoke is adapted to the winding window of the coil frame; the armature is installed on the base corresponding to one end of the coil frame through a compression spring and cooperates with the end edge of the other side of the L-shaped yoke serving as the pole shoe surface; the movable spring and static spring are respectively installed on the base corresponding to the outer side of the other end of the coil frame; the push card is connected between the movable spring and the armature; the upper sections of the two coil pins are respectively on the outer side of the armature in the width direction.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The present invention adopts a sheet structure in which the coil pin is a copper strip stamped into a Z-shaped shape, including an upper section, a middle section and a lower section, and the upper section is vertically upward, the lower section is vertically downward, and the middle section is horizontally connected between the bottom end of the upper section and the top end of the lower section; the flange at one end of the coil frame is provided with two oblique horizontal grooves for matching the middle section of the coil pin, so that when the middle sections of the two coil pins are respectively adapted to the two oblique horizontal grooves of the flange at one end of the coil frame, the distance between the upper sections of the two coil pins is greater than the distance between the lower sections of the two coil pins. This structure of the present invention can meet the demand for smaller lead-out pin spacing and the upper magnetic circuit part does not need to bend the winding head to rewind the space, which can reduce the process steps and improve efficiency; at the same time, it can give way to the working surface of the pole shoe of the magnetic circuit to the maximum, thereby improving the suction performance of the relay magnetic circuit.

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments; however, the small electromagnetic relay with a horizontal magnetic circuit of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the coil and the coil pin in the embodiment of the present invention;

[0021] Figure 31 is a schematic diagram of a three-dimensional structure of a coil and a coil pin in cooperation with each other according to an embodiment of the present invention (rotated at an angle);

[0022] Figure 4 This is a front view of the coil and the coil pin of the embodiment of the present invention;

[0023] Figure 5 is a top view of the coil and coil pins of an embodiment of the present invention in cooperation;

[0024] Figure 6 is a bottom view of the coil and the coil pin of an embodiment of the present invention in cooperation;

[0025] Figure 7 is a side view of a coil and a coil pin in cooperation with each other according to an embodiment of the present invention;

[0026] Figure 8 is a schematic structural diagram of a coil pin of an embodiment of the present invention;

[0027] Fig. 9 1 is a bottom view of a coil bobbin according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] Example

[0029] See also Figures 1 to 9 As shown, a small electromagnetic relay with a horizontal magnetic circuit of the present invention comprises a coil 2, an iron core 1, a yoke 73, an armature 72 and a coil pin 3; the coil 2 comprises a coil frame 21 and an enameled wire 22 wound around a winding window of the coil frame; the iron core hole 211 of the coil frame 21 is arranged horizontally, the iron core 1 is inserted into the iron core hole 211 of the coil frame and a pole surface is provided at one end of the coil frame; the coil frame 21 comprises a winding shaft 212 and flanges at both ends of the winding shaft, and the winding window is surrounded by the two flanges and the winding shaft; two coil pins 3 are respectively inserted and matched in the flange 4 at one end of the coil frame having the iron core pole surface; the yoke 73 cooperates with the coil 2, and the armature 72 is connected to the yoke outside the flange 4 at one end of the coil frame. one end of the iron 73 is matched; the coil pin 3 is a sheet structure punched into a Z-shaped shape by a copper strip, including an upper section 31, a middle section 32 and a lower section 33, and the upper section 31 is vertically upward, the lower section 33 is vertically downward, and the middle section 32 is horizontally connected between the bottom end of the upper section 31 and the top end of the lower section 33; the flange 4 at one end of the coil frame is provided with two oblique horizontal grooves 5 for matching the middle section of the coil pin, so that when the middle sections 32 of the two coil pins are respectively adapted to the two oblique horizontal grooves 5 of the flange at one end of the coil frame, the distance between the upper sections 31 of the two coil pins is greater than the distance between the lower sections 32 of the two coil pins, so as to utilize the oblique setting of the two coil pins to provide the largest pole shoe matching surface for the yoke and the armature.

[0030] In this embodiment, in the flange 4 at one end of the coil frame, protrusions 6 are integrally extended outward in the length direction at both sides of the width, and the two oblique horizontal grooves 5 are respectively provided on the bottom surfaces of the two protrusions 6 .

[0031] In this embodiment, the angle between the projection of the oblique horizontal groove 5 on the horizontal plane and the projection of the axis of the core hole 211 on the horizontal plane is greater than 0 degrees and less than 90 degrees. When the angle between the projection of the oblique horizontal groove 5 on the horizontal plane and the projection of the axis of the core hole 211 on the horizontal plane is 90 degrees, the upper end 31 of the lead pin is closer to the flange 4, and there is no winding space M at the upper end 31 of the lead pin (such as Figure 5 As shown), it is not conducive to the winding of the upper end 31 of the lead pin; when the angle between the projection of the oblique horizontal slot 5 on the horizontal plane and the projection of the axis of the core hole 211 on the horizontal plane is 0 degrees, the upper ends 31 of the two lead pins are closer, so that the yoke iron pole shoe surface N becomes smaller (as shown). Figure 7 As shown), it affects the magnetic conductive area, thus affecting parameters such as suction force.

[0032] In this embodiment, the protrusion 6 is provided with an insertion slot 61 which is transparent from top to bottom at one end of the outer side corresponding to the oblique horizontal slot 5, and the bottom end of the insertion slot 61 is connected to the oblique horizontal slot 5; the lower part or the middle and lower part of the upper section 31 of the two coil pins 3 are respectively fitted in the insertion slot 61, so that the upper section 31 of the two coil pins 3 is further away from the flange 4 at one end of the coil frame relative to the lower section 33 of the two coil pins in the length direction of the coil frame, thereby providing sufficient space M for winding the enameled wire (such as Figure 4 shown).

[0033] In this embodiment, the two protrusions 6 are provided with notches 62 on the opposite inner sides, and one end of the yoke 73 is fitted between the two notches 62. Since the two coil pins 3 are arranged obliquely, the middle section 32 of the coil pin 3 is buried in the oblique horizontal groove 5, the yoke 73 is located above the middle section 32 of the coil pin 3, and a part of the upper section 31 of the coil pin 3 is buried in the wire frame protrusion 6. Due to the oblique arrangement, the protrusion 6 can have a concave space to give way to the yoke pole shoe surface to the maximum, and the armature working surface matched therewith is also enlarged. The armature 72 is provided with a rotating shaft on both sides, and the rotating shaft of the armature 72 is also matched in the notch 62 of the protrusion 6.

[0034] In this embodiment, the upper portion of the upper section of the coil pin 3 is configured as a coil winding head 311 and is exposed outside the protrusion 6 .

[0035] In this embodiment, a barb structure 312 is further provided at the lower part or the lower middle part of the upper section of the coil pin 3 to prevent the upper section 31 of the coil pin 3 from being withdrawn after being inserted into the insertion slot 61 of the protrusion 6 .

[0036] In this embodiment, the barb structure 312 is disposed on one side of the width of the lower portion or the lower middle portion of the upper section of the coil pin.

[0037] In this embodiment, the middle section 32 of the coil pin 3 is provided with a convex bump 321 outwardly in the thickness direction, so that when the middle section 32 of the coil pin is matched with the oblique horizontal groove 5, an interference fit is achieved.

[0038] In this embodiment, the lower section 33 of the coil pin is configured as a lead pin.

[0039] Furthermore, it also includes a base 71, an armature 72, a yoke 73, a push card 74, a movable spring 75 and a static spring 76; the coil frame 21 is installed in the base 71, the yoke 73 is L-shaped, one side of the L-shape of the yoke 73 is connected to the iron core 1 at the other end of the coil frame 21, and the other side of the L-shape of the yoke 73 is adapted to the winding window of the coil frame 21; the armature 72 is installed on the base 71 corresponding to one end of the coil frame through a compression spring 77 and cooperates with the end edge of the other side of the L-shape of the yoke 73 as the pole shoe surface; the movable spring 75 and the static spring 76 are respectively installed on the base 71 corresponding to the outer side of the other end of the coil frame; the push card 74 is connected between the movable spring 75 and the armature 72; the upper sections 31 of the two coil pins are respectively on the outer side of the armature 72 in the width direction.

[0040] The coil pin 3 of the present invention adopts a sheet structure punched into a Z-shaped shape by a copper strip. This lead sheet structure is simple and easy to produce. The two coil pins 3 are symmetrically arranged on both sides of the coil frame, which can realize the arrangement of a wider spacing in the upper half of the magnetic circuit and a narrower spacing in the lower half. Therefore, the demand for a smaller lead pin spacing can be met. At the same time, the pole shoe working surface of the coil frame magnetic circuit can be maximized, thereby improving the suction performance of the relay magnetic circuit.

[0041] The coil pin 3 of the present invention is inserted into the coil frame groove at a certain angle. The barbs and convex parts provided on the coil pin 3 are used to achieve interference fit fixation with the coil frame. Sufficient space can be reserved for the coil pin in the upper part of the magnetic circuit to meet the winding space M required for the coil winding head, thereby eliminating the process of bending the coil terminal and then straightening it when winding the coil head in the prior art, thereby reducing the process steps and improving production efficiency.

[0042] The present invention simplifies the process to only one insertion process, which is simpler and more efficient than all existing technical solutions, and can ensure higher pin spacing dimensional accuracy and better dimensional consistency.

[0043] The angle between the projection of the oblique horizontal groove 5 of the present invention on the horizontal plane and the projection of the axis of the core hole 211 on the horizontal plane cannot be 90 degrees. When the Z-shaped coil pin 3 is inserted at 90° with the length direction of the coil frame, there will be a problem that the upper half of the coil pin is too close to the coil frame and the winding head space M is insufficient, so the winding head needs to be bent and straightened. If enough winding head winding space is to be reserved, the winding window of the coil frame needs to be shortened, which affects the suction performance of the product. Or the length of the entire product is lengthened, but this will make the overall size of the entire product larger, affecting the use. When the Z-shaped coil pin 3 is inserted in a parallel direction with the length direction of the coil frame, although the winding head space of the upper half of the coil pin can be sufficient. However, under the requirement of meeting the smaller lead pin spacing, this insertion method will reduce the working surface of the pole shoe surface of the yoke iron and the armature in the magnetic circuit. The magnetic circuit suction of the relay is limited and the performance of the relay is reduced. Moreover, the winding space of the coil winding head is insufficient, so it is also undesirable.

[0044] A small electromagnetic relay with a horizontal magnetic circuit of the present invention adopts a sheet structure in which the coil pin 3 is a copper strip stamped into a Z-shaped shape, including an upper section 31, a middle section 32 and a lower section 33, and the upper section 31 is vertically upward, the lower section 33 is vertically downward, and the middle section 32 is horizontally connected between the bottom end of the upper section 31 and the top end of the lower section 33; the flange 4 at one end of the coil frame is provided with two oblique horizontal grooves 5 for matching the middle section of the coil pin, so that when the middle sections 32 of the two coil pins are respectively adapted to the two oblique horizontal grooves 5 of the flange at one end of the coil frame, the distance between the upper sections 31 of the two coil pins is greater than the distance between the lower sections 33 of the two coil pins. This structure of the present invention can meet the requirements of reducing the lead-out pin spacing and the upper magnetic circuit part does not need to bend the winding head to rewind and reset the space, which can reduce the process steps and improve efficiency; at the same time, it can give way to the maximum working surface of the pole shoe of the magnetic circuit, thereby improving the suction performance of the relay magnetic circuit.

[0045] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above, or modify it into an equivalent equivalent embodiment without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A small electromagnetic relay with a horizontal magnetic circuit, comprising a coil, an iron core, a yoke, an armature and a coil pin; the coil comprises a coil frame and an enameled wire wound around a winding window of the coil frame; the iron core is inserted into the iron core hole of the coil frame and a pole surface is provided at one end of the coil frame; the coil frame comprises a winding shaft and flanges at both ends of the winding shaft, and the winding window is surrounded by the two flanges and the winding shaft; two coil pins are respectively inserted and matched in the flange at one end of the coil frame having the iron core pole surface; the yoke matches the coil, and the armature matches one end of the yoke outside the flange at one end of the coil frame; the characteristics are: The coil pin is in a Z-shape, including an upper section, a middle section and a lower section, and the upper section is vertically upward, the lower section is vertically downward, and the middle section is horizontally connected between the bottom end of the upper section and the top end of the lower section; the flange at one end of the coil frame is provided with two oblique horizontal grooves for matching the middle section of the coil pin, so that when the middle sections of the two coil pins are respectively adapted to the two oblique horizontal grooves of the flange at one end of the coil frame, the distance between the upper sections of the two coil pins is greater than the distance between the lower sections of the two coil pins, so as to utilize the oblique setting of the two coil pins to provide the largest pole shoe matching surface for the yoke and the armature.

2. The small electromagnetic relay with horizontal magnetic circuit according to claim 1, characterized in that: The coil pin is a sheet structure formed by punching a copper strip into a Z-shaped shape.

3. The small electromagnetic relay with horizontal magnetic circuit according to claim 1 or 2, characterized in that: In the flange at one end of the coil frame, protrusions are integrally extended outward in the length direction at both sides of the width, and the two oblique horizontal grooves are respectively arranged on the bottom surfaces of the two protrusions.

4. The small electromagnetic relay with horizontal magnetic circuit according to claim 3 is characterized in that: The angle between the projection of the oblique horizontal groove on the horizontal plane and the projection of the axis of the core hole on the horizontal plane is greater than 0 degrees and less than 90 degrees.

5. The small electromagnetic relay with horizontal magnetic circuit according to claim 4, characterized in that: In the protrusion, at the outer end corresponding to the oblique horizontal groove, there is also a vertically transparent insertion groove, and the bottom end of the insertion groove is connected to the oblique horizontal groove; the lower part or the middle and lower part of the upper section of the two coil pins are respectively matched in the insertion groove, so that the upper sections of the two coil pins are farther away from the flange at one end of the coil frame relative to the lower sections of the two coil pins in the length direction of the coil frame, thereby providing sufficient space for the winding of the enameled wire.

6. The small electromagnetic relay with horizontal magnetic circuit according to claim 5, characterized in that: The two protrusions are respectively provided with notches on opposite inner sides, and one end of the yoke is adapted between the two notches.

7. The small electromagnetic relay with horizontal magnetic circuit according to claim 5, characterized in that: The upper part of the upper section of the coil pin is set as a coil winding head and is exposed outside the protrusion.

8. The small electromagnetic relay with horizontal magnetic circuit according to claim 5, characterized in that: A barb structure is also provided at the lower part or the lower middle part of the upper section of the coil pin to prevent the upper section of the coil pin from being withdrawn after being inserted into the insertion slot of the protrusion.

9. The small electromagnetic relay with horizontal magnetic circuit according to claim 8, characterized in that: The barb structure is arranged on one or both sides of the width of the lower part or the lower middle part of the upper section of the coil pin.

10. The small electromagnetic relay with horizontal magnetic circuit according to claim 5, characterized in that: The middle section of the coil pin is provided with a convex bump outwardly in the thickness direction, so as to achieve an interference fit when the middle section of the coil pin is matched with the oblique horizontal groove.

11. The small electromagnetic relay with horizontal magnetic circuit according to claim 5, characterized in that: The lower section of the coil pin is set as a lead pin.

12. The small electromagnetic relay with horizontal magnetic circuit according to claim 6, characterized in that: Furthermore, it also includes a base, a push card, a movable spring and a static spring; the coil frame is installed in the base, the yoke is L-shaped, one side of the L-shaped yoke is connected to the iron core at the other end of the coil frame, and the other side of the L-shaped yoke is adapted to the winding window of the coil frame; the armature is installed on the base corresponding to one end of the coil frame through a compression spring and cooperates with the end edge of the other side of the L-shaped yoke serving as the pole shoe surface; the movable spring and static spring are respectively installed on the base corresponding to the outer side of the other end of the coil frame; the push card is connected between the movable spring and the armature; the upper sections of the two coil pins are respectively on the outer side of the armature in the width direction.

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