Lead-out pin fixing structure and electromagnetic relay

Abstract

The invention discloses a lead-out pin fixing structure and an electromagnetic relay, the lead-out pin fixing structure comprises a fixing main body and a lead-out pin, the fixing main body is provided with a jack, and the lead-out pin is inserted into the jack; the insertion hole comprises a thin hole section and a thick hole section which are distributed in the axial direction of the insertion hole, and the cross section area of the thin hole section is smaller than that of the thick hole section. And the thick hole section is filled with a glue solution, the glue solution peripherally wraps the lead-out pin, and the glue solution does not enter the thin hole section, or the glue solution enters and stays in the thin hole section. According to the invention, the shaking amount of the lead-out pin in the jack can be reduced by using the thin hole section, and a relatively large gap formed between the thick hole section and the lead-out pin can be filled with a relatively large amount of glue solution, so that the wrapping thickness of the glue solution on the lead-out pin is improved, and after the lead-out pin is stressed, a glue layer formed by curing the glue solution is not easy to crack and fall off; the firmness and stability of the lead-out pins and the sealing performance of the product are improved.

Description

Technical Field

[0001] The invention relates to the technical field of relays, and in particular to a lead-out pin fixing structure and an electromagnetic relay. Background Art

[0002] During the production process, the base of the electromagnetic relay in the prior art is usually reserved with a certain number of jacks for inserting the dynamic spring lead pin, the static spring lead pin and the coil lead pin. After each lead pin is inserted into the corresponding jack, the base is sealed with glue at the jack. In order to reduce the shaking of the lead pin, the jack is usually made thinner to reduce the activity space of the lead pin in the jack, but this will make the glue filling space between the lead pin and the jack smaller, resulting in less glue filling, or even insufficient. In addition, the depth of the jack is usually shallow, so after the glue liquid solidifies, only a thin layer of glue can be formed, and the wrapping thickness of the lead pin is small or even insufficient. In the subsequent transportation and use process, once the lead pin is subjected to force or a large force, the glue layer is easy to crack or even fall off, thereby reducing the fixation of the lead pin and affecting the sealing performance of the relay. At the same time, during the glue filling process, it is also necessary to prevent glue from leaking into the cavity to prevent affecting product performance. Summary of the invention

[0003] The present invention aims at the technical problems existing in the prior art and provides a lead pin fixing structure and an electromagnetic relay, which can reduce the shaking of the lead pins and increase the amount of rubber coating through structural improvement, and are convenient for mass production.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a lead-out pin fixing structure, including a fixing body and a lead-out pin, the fixing body is provided with a socket, and the lead-out pin is inserted into the socket; the socket includes a fine hole segment and a coarse hole segment distributed along the axial direction, and the cross-sectional area of ​​the fine hole segment is smaller than the cross-sectional area of ​​the coarse hole segment; the coarse hole segment is filled with glue, and the glue circumferentially wraps the lead-out pin, and the glue does not enter the fine hole segment, or the glue enters and stays in the fine hole segment.

[0005] Furthermore, a portion of the lead-out pin located within the coarse hole section is provided with a recessed portion and / or a convex portion.

[0006] Furthermore, the recessed portion includes a groove provided on a side surface of the lead-out pin.

[0007] Furthermore, at least one side of the lead pin is provided with the groove, and there are multiple grooves on the same side of the lead pin, and the multiple grooves are arranged in parallel at intervals; the groove is in the shape of a long strip. Furthermore, the groove is formed by embossing the side of the lead pin.

[0008] Furthermore, the fixed body is also provided with a glue dispensing groove corresponding to the insertion hole, the cross-sectional area of ​​the glue dispensing groove is larger than the cross-sectional area of ​​the coarse hole section, the glue dispensing groove is located at one end of the coarse hole section away from the fine hole section, and is connected to the coarse hole section, so that the glue entering the glue dispensing groove flows into the coarse hole section.

[0009] Furthermore, the fixing body includes a bottom plate and an extending protrusion arranged corresponding to the insertion hole, the extending protrusion is arranged on the inner side of the bottom plate, and the extending protrusion is provided with a through hole, and the through hole penetrates the bottom plate to form the insertion hole.

[0010] Furthermore, the fine hole segment and the coarse hole segment are sequentially distributed along the insertion direction of the lead pin, and a port at one end of the fine hole segment away from the coarse hole segment is in a flared shape.

[0011] Furthermore, the depth of the coarse pore segment is greater than or equal to the depth of the fine pore segment.

[0012] The fixed body is a base of the electromagnetic relay, and the jacks and the lead pins are respectively provided in plural numbers, and the jacks correspond to the lead pins in a one-to-one manner.

[0013] The present invention further provides an electromagnetic relay, comprising the lead pin fixing structure as described above in the present invention.

[0014] Furthermore, the fixed body is a base, and the jacks and lead pins are respectively set to multiple, and the multiple jacks correspond one-to-one to the multiple lead pins; the multiple lead pins include one or more of the movable spring lead pins, static spring lead pins, and coil lead pins.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Since the jack of the present invention includes a fine hole section and a coarse hole section distributed along the axial direction of the jack, the cross-sectional area of ​​the fine hole section is smaller than the cross-sectional area of ​​the coarse hole section, and the coarse hole section is filled with glue, the glue wraps the lead pin in a circumferential direction, and the glue does not enter the fine hole section, or the glue enters and stays in the fine hole section, so that the present invention can use the fine hole section to reduce the shaking amount of the lead pin in the jack, and on the other hand, it can use the larger gap formed between the coarse hole section and the lead pin to fill more glue, thereby increasing the wrapping thickness of the glue on the lead pin, so that after the lead pin is stressed, the glue layer formed by the glue solidification is not easy to crack or fall off, thereby improving the firmness and stability of the lead pin and the sealing performance of the product. In addition, the glue can automatically enter and stay in the fine hole section under the action of capillary phenomenon, on the one hand, increasing the contact area between the lead pin and the glue, thereby further improving the bonding force between the glue and the lead pin, and on the other hand, it can gradually stop the glue, avoiding the glue flowing out of the fine hole section to cause unnecessary pollution and waste, and even affecting the working performance of the product, and is convenient for mass production.

[0017] 2. As a preferred embodiment, the portion of the lead pin located in the coarse hole section is provided with a recessed portion and / or a convex portion, so that the present invention can utilize the recessed portion and / or the convex portion to increase the contact area between the lead pin and the glue, thereby improving the bonding force between the glue and the lead pin. Furthermore, the recessed portion includes a groove provided on the side of the lead pin, so that the recessed portion is easier to process and shape. Moreover, there are multiple grooves on the same side of the lead pin, each of which is in the shape of a long strip, which can greatly increase the contact area between the lead pin and the glue within a limited size, thereby further improving the bonding force between the glue and the lead pin.

[0018] 3. As a preferred embodiment, the fixed body is also provided with the glue dispensing groove, so that the present invention can use the glue dispensing groove to achieve convenient glue dispensing, allowing the glue liquid to enter the coarse hole section along the glue dispensing groove, which can improve the uniformity of the glue liquid distributed around the coarse hole section.

[0019] 4. The fixed body includes a bottom plate and an extended protrusion corresponding to the insertion hole, the extended protrusion is arranged on the inner side of the bottom plate, and the extended protrusion is provided with a through hole, which penetrates the bottom plate to form the insertion hole, so that the present invention can use the extended protrusion to increase the depth of the insertion hole, thereby increasing the depth of the fine hole section and / or the coarse hole section, and further improve the firmness of the connection between the lead pin and the fixed body. In particular, the extended protrusion is located on the inner side of the bottom plate, rather than the surface side, which can avoid the extended protrusion increasing the height of the product, thereby reducing the occupied space.

[0020] 5. As a preferred embodiment, the fine hole segment and the coarse hole segment are sequentially distributed along the insertion direction of the lead pin, and the port at one end of the fine hole segment away from the coarse hole segment is flared, so that the present invention can use the flared port to guide the lead pin when the lead pin is inserted into the jack, thereby realizing convenient insertion of the lead pin. In addition, during the glue dispensing process, if the glue climbs out of the fine hole segment, the capillary phenomenon is used to force the glue to automatically stop at the flared port, and the fine hole segment and the flared shape double ensure that the glue does not enter the cavity to cause the reed to stick.

[0021] 6. The depth of the coarse hole section is greater than or equal to the depth of the fine hole section, which can increase the wrapping length of the lead pin by the glue in the coarse hole section, thereby improving the bonding force between the glue and the lead pin.

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the lead pin fixing structure and the electromagnetic relay of the present invention are not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the electromagnetic relay of the present invention;

[0024] Figure 2 is a top view of the base of the present invention;

[0025] Figure 3 yes Figure 2 AA section view;

[0026] Figure 4 yes Figure 2 BB cross-sectional view;

[0027] Figure 5 yes Figure 3 The enlarged schematic diagram of part Ⅰ;

[0028] Figure 6 The three-dimensional structure diagram of the static spring part of the present invention is shown in FIG. Figure 1 ;

[0029] Figure 7 The three-dimensional structure diagram of the static spring part of the present invention is shown in FIG. Figure 2 ;

[0030] Figure 8 yes Figure 6 The enlarged schematic diagram of middle Ⅱ;

[0031] Fig. 9 The three-dimensional structure of the dynamic spring part of the present invention is shown in FIG. Figure 1 ;

[0032] Fig.10 The three-dimensional structure of the dynamic spring part of the present invention is shown in FIG. Figure 2 ;

[0033] Fig.11 is a top view of the electromagnetic relay of the present invention;

[0034] Fig.12 yes Fig.11 CC section view;

[0035] Fig.13 yes Fig.12 An enlarged schematic diagram of part III;

[0036] Fig.14 yes Fig.11 DD cross-sectional view;

[0037] Fig.15 yes Fig.14 A magnified schematic diagram of middle Ⅳ;

[0038] Fig.16 yes Fig.11 EE cross-sectional view;

[0039] Fig.17 yes Fig.11 FF cross-sectional view;

[0040] In the figure, 1. base; 11. first plug hole; 111. fine hole section; 112. coarse hole section; 113. first gap; 114. second gap; 12. second plug hole; 13. glue dispensing groove; 14. bottom plate; 15. extended protrusion; 2. static spring part; 21. static spring lead pin; 211. groove; 22. static spring sheet; 23. static contact; 3. moving spring part; 31. moving spring lead pin; 32. rigid spring sheet; 33. moving spring sheet; 34. moving contact; 4. magnetic circuit part; 41. coil lead pin; 42. armature; 43. yoke; 44. coil home; 5. push card. DETAILED DESCRIPTION

[0041] In the present invention, the terms "first", "second", etc. are only used to distinguish similar objects, rather than to describe a specific order or sequence, and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0042] See also Figure 1-Figure 17 As shown, a lead-out pin fixing structure of the present invention includes a fixing body and a lead-out pin, the fixing body is provided with a socket corresponding to the lead-out pin, the lead-out pin is inserted into the socket along the axial direction of the socket, and the cross-section of the lead-out pin is square, and the cross-section of the socket is also square, but it is not limited to this. In other embodiments, the cross-sections of the lead-out pin and the socket are both circular, etc.

[0043] In this embodiment, the fixed body is the base 1 of the electromagnetic relay, but it is not limited to this. The lead pin is roughly columnar, or rod-shaped, but it is not limited to this. In other embodiments, the lead pin is sheet-shaped. The jacks and the lead pins are respectively set to multiple, and the multiple jacks correspond to the multiple lead pins one by one. The multiple lead pins include one or more of the movable spring lead pin 31, the static spring lead pin 21, and the coil lead pin 41 of the electromagnetic relay. In addition to the base 1, the electromagnetic relay also includes a magnetic circuit part 4, a movable spring part 3, and a static spring part 2. The movable spring part 3 is provided with a movable spring lead pin 31, the static spring part 2 is provided with a static spring lead pin 21, and the coil frame 44 of the magnetic circuit part 4 is provided with a coil lead pin 41. For the convenience of distinction, the multiple jacks are respectively named as the first jack 11 for inserting the static spring lead pin 21, the second jack 12 for inserting the movable spring lead pin 31, and the third jack for inserting the coil lead pin 41 (not shown in the figure). The following describes the lead pin fixing structure of the present invention in detail by taking the static spring lead pin 21 and the first plug hole 11 as an example.

[0044] The first plug hole 11 includes a fine hole section 111 and a coarse hole section 112 distributed along the axial direction thereof. Specifically, in this embodiment, the first plug hole 11 includes the fine hole section 111 and the coarse hole section 112 distributed in sequence along the insertion direction of the static spring lead-out pin 21. Figure 5 As shown, but not limited to this, in other embodiments, the first plug hole includes a fine hole segment and a coarse hole segment distributed in sequence along the opposite direction of the insertion direction of the static spring lead pin. The cross-sectional area of ​​the fine hole segment 111 is smaller than the cross-sectional area of ​​the coarse hole segment 112, and the coarse hole segment 112 is filled with glue, which circumferentially wraps the static spring lead pin 21, and the glue does not enter the fine hole segment 111, or the glue enters and stays in the fine hole segment 111. Specifically, in this embodiment, there is a first gap 113 between the inner wall surface around the fine hole segment 111 and the outer side surface around the static spring lead pin 21, and there is a second gap 114 between the inner wall surface around the coarse hole segment 112 and the outer side surface around the static spring lead pin 21, the first gap 113 is slightly greater than 0, and the second gap 114 is greater than the first gap 113. Therefore, the fine hole section 111 roughly matches the static spring lead-out pin 21, and can position the static spring lead-out pin 21. At the same time, the glue can enter and stay in the fine hole section 111 under the action of capillary phenomenon.

[0045] As a preferred embodiment, the portion of the static spring lead-out pin 21 located in the rough hole section 112 is provided with a recessed portion and / or a convex portion, so as to increase the contact area between the static spring lead-out pin 21 and the glue, thereby improving the bonding force between the glue and the static spring lead-out pin 21. In this embodiment, the portion of the static spring lead-out pin 21 located in the rough hole section 112 is provided with a recessed portion as an example, but it is not limited to this. The recessed portion specifically includes a groove 211 provided on the side of the static spring lead-out pin 21, but it is not limited to this. In other embodiments, the portion of the static spring lead-out pin 21 located in the rough hole section 112 is formed into a recessed portion by bending, or the portion of the static spring lead-out pin 21 located in the rough hole section 112 is formed into a recessed portion (or referred to as a groove 211) by providing a plurality of convex portions distributed at intervals, and utilizing the intervals between adjacent convex portions. In this embodiment, the recessed portion 211 is provided on at least two side surfaces of the static spring lead-out pin 21, and specifically, the recessed portion 211 is provided on two side surfaces of the static spring lead-out pin 21 in its thickness direction. In other embodiments, the groove is provided on only one side of the static spring lead-out pin. There are multiple grooves 211 on the same side of the static spring lead-out pin 21, and the multiple grooves 211 are arranged in parallel at intervals, and each groove 211 is in the shape of a long strip and extends in a direction perpendicular to the distribution direction of the multiple grooves 211, but it is not limited to this. Specifically, the multiple grooves 211 are distributed along the length direction of the static spring lead-out pin 21, but it is not limited to this. The groove 211 is formed by embossing on the side of the static spring lead-out pin 21, which makes the process simpler and allows the side of the static spring lead-out pin 21 to be provided with multiple densely distributed grooves 211 within a limited size.

[0046] Furthermore, the base 1 is provided with a glue dispensing groove 13 on one side (i.e., the side of the base 1 facing downward) where the first plug hole 11 is located and close to the coarse hole section 112. The cross-sectional area of ​​the glue dispensing groove 13 is larger than the cross-sectional area of ​​the coarse hole section 112, and the glue dispensing groove 13 is located at one end of the coarse hole section 112 away from the fine hole section 111, and is connected to the coarse hole section 112. In this way, when the product is plastic-sealed, the glue dispensing groove 13, which is wider than the coarse hole section 112, can be used to achieve convenient glue dispensing, and the glue can flow into the coarse hole section 112 along the four sides of the glue dispensing groove 13, so that the glue is evenly distributed around the inside of the first plug hole 11.

[0047] The base 1 includes a bottom plate 14 and an extended protrusion 15 respectively arranged corresponding to each socket. The extended protrusion 15 is arranged on the inner side of the bottom plate 14, and the extended protrusion 15 is provided with a through hole, which penetrates the bottom plate 14 to form the socket, so that the present invention can use the extended protrusion 15 to increase the depth of the socket, thereby increasing the depth of the fine hole section and / or the coarse hole section, and further improving the firmness of the connection between each lead pin and the base 1.

[0048] In this embodiment, the port of the fine hole section 111 at one end away from the coarse hole section 112 is flared by chamfering, so that the present invention can use the flared port to guide the static spring lead pin 21 when the static spring lead pin 21 is inserted into the first plug hole 11, thereby realizing convenient insertion of the static spring lead pin 21. During the dispensing process, the present invention can use the capillary phenomenon to realize that the glue quickly fills the fine hole section 111 and automatically stops at the flared port of the fine hole section 111, thereby increasing the glue filling amount of the first plug hole 11, further improving the bonding force between the glue and the static spring lead pin 21, and facilitating mass production.

[0049] In this embodiment, the depth of the coarse hole section 112 is greater than or equal to the depth of the fine hole section 111, which can increase the wrapping length of the lead pin by the glue in the second gap 114, thereby improving the bonding force between the glue and the lead pin.

[0050] The matching structure between the second jack 12 and the movable spring lead pin 31, the matching structure between the third jack 13 and the coil lead pin 41 and the matching structure between the first jack 11 and the static spring lead pin 21 are consistent or basically consistent, and will not be repeated here.

[0051] The lead pin fixing structure of the present invention can use the fine hole section 111 to reduce the shaking amount of the lead pin in the jack, and use the larger gap (i.e., the second gap 114) formed between the coarse hole section 112 and the lead pin to fill more glue, thereby increasing the wrapping thickness of the glue on the lead pin, so that after the lead pin is subjected to force, the glue layer formed by the glue solidification is not easy to crack or fall off, thereby improving the firmness and stability of the lead pin and the sealing performance of the product. In particular, the present invention further provides a recessed portion and / or a convex portion in the portion of the lead pin located in the coarse hole section 112, and the recessed portion and / or the convex portion can be used to increase the contact area between the lead pin and the glue, thereby enhancing the bonding force between the glue and the lead pin, thereby further improving the firmness and stability of the lead pin and the sealing performance of the product.

[0052] An electromagnetic relay of the present invention comprises a static spring lead-out pin fixing structure of the present invention as described above.

[0053] In this embodiment, the electromagnetic relay of the present invention further includes a magnetic circuit portion 4, a dynamic spring portion 3, a static spring portion 2 and a push card 5, the static spring portion 2 includes a static spring piece 22, a static contact 23 and a static spring lead-out pin 21, the static contact 23 is riveted to one end of the static spring piece 22, and the static spring lead-out pin 21 is integrally formed at the other end of the static spring piece 22, such as Figure 6 , Figure 7 The movable spring part 3 includes a movable spring piece 33, a movable contact 34, a rigid spring piece 32 and a movable spring lead-out pin 31. The movable contact 34 is riveted to one end of the movable spring piece 33, and the other end of the movable spring piece 33 is riveted to the rigid spring piece 32. The movable spring lead-out pin 31 is integrally formed on the rigid spring piece 32. Fig. 9 , Fig.10 As shown. The static spring part 2 is set to two, and the dynamic spring part 3 is located between the two static spring parts 2 and alternately cooperates with the two static spring parts 2, so that the electromagnetic relay of the present invention constitutes a switching relay. The magnetic circuit part 4 is located on one side of the arrangement direction of the two static spring parts 2 and the dynamic spring part 3, and the magnetic circuit part 4 includes a coil frame 44 wound with a coil, an armature 42 and a U-shaped yoke 43. The coil frame 44 is horizontal, one side of the yoke 43 is inserted into the axial hole of the coil frame 44, and the other side of the yoke 43 is located outside the coil frame 44 and cooperates with the upper side of the coil frame 44; the armature 42 is swingably arranged on the side of the coil frame 44 away from the static spring part 2 in the axial direction, and cooperates with the yoke 43. The push card 5 is slidably arranged on the top of the base 1 and connects the armature 42 and the dynamic spring piece 33.

[0054] For the structure and principle of the lead pin fixing structure, please refer to the previous description, which will not be repeated here.

[0055] The lead pin fixing structure and electromagnetic relay of the present invention, the unrelated parts are the same as the prior art or can be implemented by using the prior art.

[0056] The above embodiments are only used to further illustrate a lead pin fixing structure and an electromagnetic relay of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the technical solution of the present invention.

Claims

1. A lead pin fixing structure, comprising a fixing body and a lead pin, wherein the fixing body is provided with an insertion hole, and the lead pin is inserted into the insertion hole; characterized in that: The socket includes a fine hole segment and a coarse hole segment distributed along the axial direction of the socket, and the cross-sectional area of ​​the fine hole segment is smaller than the cross-sectional area of ​​the coarse hole segment; the coarse hole segment is filled with glue, and the glue circumferentially wraps the lead-out pin, and the glue does not enter the fine hole segment, or the glue enters and stays in the fine hole segment.

2. The lead-out pin fixing structure according to claim 1, characterized in that: The portion of the lead-out pin located in the coarse hole section is provided with a recessed portion and / or a convex portion.

3. The lead-out pin fixing structure according to claim 2, characterized in that: The recessed portion includes a groove arranged on a side surface of the lead-out pin.

4. The lead-out pin fixing structure according to claim 3, characterized in that: The groove is provided on at least one side of the lead-out pin, and a plurality of grooves are provided on the same side of the lead-out pin, and the plurality of grooves are arranged in parallel at intervals; the groove is in the shape of an elongated strip.

5. The lead-out pin fixing structure according to claim 3 or 4, characterized in that: The groove is formed on the side surface of the lead-out pin by embossing.

6. The lead-out pin fixing structure according to claim 1, characterized in that: The fixed body is also provided with a glue dispensing groove corresponding to the insertion hole, and the cross-sectional area of ​​the glue dispensing groove is larger than the cross-sectional area of ​​the coarse hole section. The glue dispensing groove is located at one end of the coarse hole section away from the fine hole section, and is connected to the coarse hole section, so that the glue entering the glue dispensing groove flows into the coarse hole section.

7. The lead-out pin fixing structure according to claim 1, characterized in that: The fixing body comprises a bottom plate and an extending protrusion arranged corresponding to the insertion hole, the extending protrusion is arranged on the inner side of the bottom plate, and the extending protrusion is provided with a through hole, and the through hole penetrates the bottom plate to form the insertion hole.

8. The lead-out pin fixing structure according to claim 1, characterized in that: The fine hole segment and the coarse hole segment are sequentially distributed along the insertion direction of the lead pin, and a port at one end of the fine hole segment away from the coarse hole segment is in a flared shape.

9. The lead-out pin fixing structure according to claim 1, characterized in that: The depth of the coarse pore section is greater than or equal to the depth of the fine pore section.

10. The lead-out pin fixing structure according to claim 1, characterized in that: The fixed body is the base of the electromagnetic relay, and the jacks and lead pins are respectively set to multiple, and the multiple jacks correspond one-to-one to the multiple lead pins. The multiple lead pins include one or more of the movable spring lead pins, static spring lead pins, and coil lead pins.

11. An electromagnetic relay, characterized in that: It comprises the lead-out pin fixing structure as claimed in any one of claims 1 to 10.

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