Pin terminal mounting structure, pin terminal sealing structure and relay

Abstract

The invention discloses a pin terminal mounting structure, a pin terminal sealing structure and a relay, the pin terminal mounting structure is used for mounting a pin terminal to a first wall of a relay shell, the first wall is provided with a through hole for the pin terminal to penetrate through, and the outer surface of the first wall is provided with a glue pouring groove communicated with the through hole; the side surface of the pin terminal is provided with a connecting part, the connecting part is provided with a flow guide channel, and at least part of the flow guide channel is used for communicating the through hole and the glue pouring groove. The pin terminal sealing structure comprises a pin terminal mounting structure and a sealant. The pin terminal of the relay is installed on the relay housing through the pin terminal sealing structure. The pin terminals are high in fixed connection strength, and the relay is good in sealing performance.

Description

Technical Field

[0001] The present invention relates to the field of relays, and particularly to an installation structure of pin terminals, a sealing structure of pin terminals, and a relay. Background Art

[0002] A relay generally includes a relay body and a relay housing. The relay body is a magnetic circuit part and a contact part accommodated in the housing. The relay body is provided with a plurality of pin terminals, and each pin terminal extends out of the housing and is used for external electrical connection. During the assembly process of the relay, in order to make the pin terminals firm after being inserted into the housing, the pin terminals are usually in interference fit or zero-clearance fit with the housing. However, since the housing is made of plastic material, the positioning strength of the plastic becomes weak at high temperatures, which affects the assembly of the pin terminals and the protection performance is not good. For this reason, in the prior art, a glue groove is provided on the outer surface of the relay housing, and glue liquid is filled into the glue groove by a dispensing process to fix the pin terminals. However, since the pin terminals and the relay housing are in interference fit or zero-clearance fit, there is only a thin layer of the glue liquid on the surface of the housing after the glue is cured, and the fixing strength of the pin terminals is poor. When the pin terminals are welded to the outside later, the high temperature generated during welding will cause the cured glue and the pin terminals to separate due to different stresses, further affecting the fixing strength of the pin terminals and making the sealing performance of the relay poor. Summary of the Invention

[0003] An object of the present invention is to overcome the above-mentioned defects or problems in the background art, and provide an installation structure of pin terminals, a sealing structure of pin terminals, and a relay, which have high fixing strength of the pin terminals and good sealing performance of the relay.

[0004] To achieve the above object, the present invention and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0005] Technical Solution 1 and its preferred embodiments relate to an installation structure of pin terminals for installing pin terminals to a first wall of a relay housing. The first wall is provided with a through hole for the pin terminals to penetrate through, and the outer surface of the first wall has a glue filling groove communicated with the through hole. The feature is that a connecting portion is provided on the side surface of the pin terminal, and the connecting portion is provided with a diversion channel, and at least part of the diversion channel is used for communicating the through hole and the glue filling groove.

[0006] Based on Technical Solution 1, there is also Technical Solution 2. In Technical Solution 2 and its preferred embodiments, at least part of the diversion channel is also used for communicating the two ends in the width direction and / or the two ends in the thickness direction of the pin terminal.

[0007] Based on Technical Solution 2, there is also provided Technical Solution 3. In Technical Solution 3 and its preferred embodiments, a number of protrusions are arranged on the connecting portion, and at least some of the protrusions are spaced apart from each other to form the diversion channel; a slanted diversion surface is provided on one side of the protrusion facing the outer surface of the first wall.

[0008] Based on Technical Solution 3, there is also provided Technical Solution 4. In Technical Solution 4 and its preferred embodiments, all of the protrusions are spaced apart from each other and communicate to form a number of intersecting diversion branches, and each diversion branch communicates to form the diversion channel; the diversion surface forms a part of the diversion channel, and at least some of the protrusions in the connecting portion are located in the potting groove, and some of the protrusions are located in the through hole and are opposite to the hole wall of the through hole so that the diversion channel communicates with the through hole and the potting groove.

[0009] Based on Technical Solution 4, there is also provided Technical Solution 5. In Technical Solution 5 and its preferred embodiments, the pin terminal penetrates through the through hole along the first direction, and each diversion branch is inclined relative to the first direction.

[0010] Based on Technical Solution 5, there is also provided Technical Solution 6. In Technical Solution 6 and its preferred embodiments, the included angle between the diversion branch and the first direction is 30 - 60°.

[0011] Based on Technical Solution 1, there is also provided Technical Solution 7. In Technical Solution 7 and its preferred embodiments, the connecting portions are provided on both sides in the thickness direction of the pin terminal.

[0012] Based on Technical Solution 1, there is also provided Technical Solution 8. In Technical Solution 8 and its preferred embodiments, the pin terminal is further provided with a glue receiving groove located in the potting groove.

[0013] Based on Technical Solution 1, there is also provided Technical Solution 9. In Technical Solution 9 and its preferred embodiments, the pin terminal is further provided with a glue receiving groove located on the connecting portion, and the glue receiving groove communicates with the diversion channel.

[0014] Based on Technical Solution 1, there is also provided Technical Solution 10. In Technical Solution 10 and its preferred embodiments, the pin terminal is further provided with a glue receiving groove connected to one end of the connecting portion away from the potting groove, and the glue receiving groove communicates with the diversion channel.

[0015] Based on any one of Technical Solutions 8 to 10, there is also provided Technical Solution 11. In Technical Solution 11 and its preferred embodiments, the glue receiving groove and the connecting portion are correspondingly provided on at least one side in the thickness direction of the pin terminal, and both ends of the glue receiving groove extend to both ends in the width direction of the pin terminal.

[0016] Based on Technical Solution 11, there is also provided Technical Solution 12. In Technical Solution 12 and its preferred embodiments, the middle part of the glue receiving groove protrudes towards the direction close to the potting groove relative to both ends thereof.

[0017] Based on Technical Solution 1 or 7, there is also provided Technical Solution 13. In Technical Solution 13 and its preferred embodiments, at least one first groove is respectively provided on at least one corresponding connecting part on at least one side in the width direction of the part of the pin terminal extending into the potting groove and the through hole.

[0018] Based on Technical Solution 13, there is also provided Technical Solution 14. In Technical Solution 14 and its preferred embodiments, the first grooves are provided on both sides in the width direction of the pin terminal. The first grooves extend along the thickness direction of the pin terminal, and the first grooves on both sides of the pin terminal are arranged staggeredly along the length direction of the pin terminal.

[0019] Technical Solution 15 and its preferred embodiments relate to a pin terminal sealing structure, including the pin terminal mounting structure according to any one of Technical Solutions 1 to 14 and a sealant. The sealant is filled from the potting groove between the pin terminal and the first wall.

[0020] Technical Solution 16 and its preferred embodiments relate to a relay, including a relay housing and a relay body. The relay body is provided with pin terminals. The feature is that the pin terminals are mounted on the relay housing through the pin terminal sealing structure according to Technical Solution 15. The relay housing is provided with the first wall, and the first wall is provided with a through hole for the pin terminals to penetrate. The outer surface of the first wall has a potting groove communicated with the through hole.

[0021] Based on Technical Solution 16, there is also provided Technical Solution 17. In Technical Solution 17 and its preferred embodiments, the pin terminal is in limit fit with the through hole at least in the thickness direction.

[0022] Based on Technical Solution 17, there is also provided Technical Solution 18. In Technical Solution 18 and its preferred embodiments, the pin terminal penetrates the through hole along a first direction. The through hole is provided with a first hole and a second hole along the first direction. The first hole is located on the side of the second hole away from the potting groove along the first direction. In the thickness direction and / or width direction of the pin terminal, the size of the first hole is larger than that of the second hole, and the pin terminal establishes the limit fit relationship with the second hole; along the first direction, one end of the diversion channel is located in the first hole, and the other end is located in the potting groove.

[0023] Based on Technical Solution 18, there is also provided Technical Solution 19. In Technical Solution 19 and its preferred embodiments, the hole wall of the second hole for limit fit with the pin terminal is provided with a notch; the notch extends along the first direction and divides the hole wall into at least two parts.

[0024] Based on Technical Solution XVI, there is also provided Technical Solution XX. In Technical Solution XX and its preferred embodiments, the potting groove includes a first glue groove and a second glue groove. The first glue groove is correspondingly arranged with the through hole and connected to the outer end of the through hole; the second glue groove is communicated with the through hole through the first glue groove; the cross-sectional area of the first glue groove gradually increases in the direction away from the through hole.

[0025] Based on Technical Solution XX, there is also provided Technical Solution XXI. In Technical Solution XXI and its preferred embodiments, the relay housing includes a base and a cover. The first wall is provided on the base. The cover is sleeved outside the relay body and the base. The side wall of the cover and the first wall of the base enclose to form the second glue groove.

[0026] As can be seen from the above description of the present invention and its preferred embodiments, compared with the prior art, the technical solutions and their preferred embodiments of the present invention have the following beneficial effects due to the following technical means:

[0027] In Technical Solution I and its preferred embodiments, the connecting portion is provided with a diversion channel. The diversion channel is at least partially used to communicate the through hole and the potting groove. The diversion channel can guide the glue liquid to flow from the potting groove into the through hole. Therefore, even if there is an interference fit between the pin terminal and the through hole, the glue liquid can flow into the through hole and fill the space between the pin terminal and the through hole, thereby increasing the connection area between the pin terminal and the through hole and enhancing the connection strength. The glue liquid forms a continuous glue layer through the diversion channel and forms an integral anchoring structure after curing, making the connection between the pin terminal and the first wall more firm. In addition, during the welding and cooling processes of the external electrical connection of the pin terminal, the stress can compress the colloid in the diversion channel and it is not easy to break away. A stable anchoring effect is formed between the colloid and the pin terminal, making the glue between the first wall and the pin terminal not easy to break away from the pin terminal, thereby improving the long-term cooperation stability between the pin terminal and the housing. In addition, when filling the glue liquid in the pin terminal sealing structure of this technical solution, only need to inject the glue liquid once from the potting groove, and it can gradually enter the through hole based on the siphon effect to fill the gap between the pin terminal and the inner wall of the through hole. The colloid formed after the glue liquid cures has a fixing effect and a reliable sealing effect on the pin terminal at the potting groove position, and has a reliable fixing effect on the pin terminal at the through hole position. Therefore, the structure of the pin terminal is stable and reliable, and since only one dispensing and drying process is required, the production efficiency is high, it is not easy to generate glue bubbles, and the generation of product defect rate can be reduced.

[0028] In Technical Solution 2 and its preferred embodiments, the diversion channel is also at least partially used to connect the two ends in the width direction and / or the two ends in the thickness direction of the pin terminal. When the diversion channel is at least partially used to connect the two ends in the width direction of the pin terminal, the diversion channel can guide the glue to spread along the width direction of the pin terminal, covering the gap between the side walls at both ends in the width direction of the pin terminal and the hole wall of the through hole; when the diversion channel is at least partially used to connect the two ends in the thickness direction of the pin terminal, the diversion channel can guide the glue to spread along the thickness direction of the pin terminal, covering the gap between the side walls at both ends in the thickness direction of the pin terminal and the hole wall of the through hole; when the diversion channel is at least partially used to connect the two ends in the width direction and the two ends in the thickness direction of the pin terminal, the glue forms a cross-flow path (such as a net-like diffusion) in the thickness direction and the width direction of the pin terminal, covering all potential gaps (width, thickness, edge dead corners) around the pin terminal, completely eliminating the sealing blind area, and significantly improving the coverage uniformity and sealing reliability of the glue filling.

[0029] In Technical Solution 3 and its preferred embodiments, the connecting portion is provided with protrusions, and at least some of the protrusions are spaced apart from each other to form a diversion channel; an inclined diversion surface is provided on one side of the outer surface of the protrusion facing the first wall, so that the gap between the protrusions can be filled with glue. The protrusions increase the surface roughness of the connecting portion, increasing the contact area between the glue and the pin terminal and improving the adhesion of the glue. The protrusions serve as a physical barrier and form a "barb" structure with the glue layer after curing, improving the peel strength of the glue layer, and the glue layer is not easily peeled off during subsequent high-temperature welding and cooling processes of the pin terminal; the inclined diversion surface can guide the glue to flow from the glue filling groove to the through hole, and can also promote the glue to advance into the gap between the protrusions and the hole wall of the through hole, so that the gap between the protrusions and the hole wall of the through hole is also filled with glue, further improving the sealing reliability and connection strength between the pin terminal and the first wall.

[0030] In Technical Solution 4 and its preferred embodiments, all the protrusions are spaced apart from each other and connected to form several intersecting diversion branches, and each diversion branch is connected to form a diversion channel, forming a multi-directional glue diffusion path. The protrusions guide the glue to flow preferentially along the diversion branches. Even if a certain diversion branch is blocked by impurities, the glue can still be filled through other diversion branches, avoiding glue overflow or uneven filling and improving the sealing reliability. The side walls and even the diversion surfaces of the protrusions directly serve as part of the diversion channel wall. The protrusions and the diversion channel structure are seamlessly integrated. Compared with the split design of the protrusions and the diversion channel, it is more conducive to preventing the glue layer from falling off due to vibration or thermal stress, and further forms a micro-gap channel between the relative positions of the protrusions and the hole wall of the through hole, which not only allows the glue to penetrate but also restricts the overflow of excessive glue, achieving a balance between filling accuracy and efficiency.

[0031] In Technical Solution Five and its preferred embodiments, each diversion branch is inclined relative to the first direction. The inclined diversion branch can extend the flow path of the glue, increase the infiltration time of the glue with the contact surface, make the glue filling more uniform, improve the sealing reliability, and the inclined diversion branch changes the main direction of the glue flow (when flowing from the potting groove to the through hole), making it flow along the extension direction of the diversion branch, which is more conducive to guiding the glue to penetrate into the relay, improving the sealing reliability, and also more conducive to promoting the glue to advance into the gap between the protrusion and the hole wall of the through hole, so that the gap between the protrusion and the hole wall of the through hole is also filled with glue, further improving the sealing reliability and connection strength between the pin terminal and the first wall. In addition, the inclined diversion channel extends the water vapor / pollutant penetration path and improves the environmental tolerance.

[0032] In Technical Solution Six and its preferred embodiments, the included angle between the diversion channel and the first direction is 30-60°, which can ensure that each intersecting diversion branch has an appropriate inclination angle, making the glue filling of each diversion branch uniform and further improving the sealing reliability.

[0033] In Technical Solution Seven and its preferred embodiments, connection parts are provided on both sides in the thickness direction of the pin terminal. Compared with the connection parts being provided on both sides in the terminal width direction of the pin terminal, the contact area between the glue and the pin terminal can be further increased, thereby improving the fixing strength between the pin terminal and the first wall.

[0034] In Technical Solution Eight and its preferred embodiments, the pin terminal is further provided with a glue storage groove located in the potting groove. The glue storage groove can be used as a glue storage area in the potting groove, compensating for the volume shrinkage of the glue during the curing process, avoiding shrinkage cracks, and the glue storage groove further increases the contact area between the glue and the pin terminal, forming a denser mechanical interlocking structure.

[0035] In Technical Solution Nine and its preferred embodiments, the pin terminal is further provided with a glue storage groove located on the connection part. The glue storage groove is communicated with the diversion channel. The glue storage groove can be used as a temporary glue storage area, absorbing excessive glue at the initial stage of glue injection, alleviating the fluctuation of the glue injection pressure, avoiding the generation of air bubbles due to sudden pressure change. During the glue injection process, the glue storage groove forms a glue distribution center, evenly distributing the glue to different areas of the diversion channel, thereby balancing the glue pressure in different areas of the diversion channel and avoiding uneven filling caused by the length difference in different areas of the diversion channel.

[0036] In Technical Solution Ten and its preferred embodiments, the pin terminal is further provided with a glue storage groove connected to one end of the connection part away from the potting groove. The glue storage groove is communicated with the diversion channel. The glue storage groove can absorb the excess glue in the through hole and the potting groove, avoiding adverse effects on the inside of the relay.

[0037] In Technical Solution XI and its preferred embodiments, the glue receiving groove is correspondingly arranged on at least one side in the thickness direction of the pin terminal. The two ends of the glue receiving groove respectively extend to the two ends in the width direction of the pin terminal, so that the glue can cover the gap between the side surfaces at both ends in the thickness direction of the pin terminal and the contact surface with the housing, eliminating the risk of edge glue leakage.

[0038] In Technical Solution XII and its preferred embodiments, the middle part of the glue receiving groove protrudes towards the glue filling groove relative to its two ends. Therefore, after the glue enters the glue receiving groove, the glue will preferentially flow along both sides of the glue receiving groove to the circumference of the through hole under the drive of the injection pressure, covering the contact surface between the hole wall of the through hole and the pin terminal, so as to evenly cover the circumference of the hole wall of the through hole, further improving the sealing reliability. After the glue solidifies, an annular anchor is formed at the openings at both ends of the glue receiving groove and the edge of the through hole, increasing the connection strength.

[0039] In Technical Solution XIII and its preferred embodiments, at least one first groove is respectively arranged on at least one side in the width direction of the part of the pin terminal for extending into the glue filling groove and the through hole. The first groove increases the contact area between the glue and the pin terminal, and the first groove forms a mechanical anchor perpendicular to the length direction of the pin terminal.

[0040] In Technical Solution XIV and its preferred embodiments, the first grooves are arranged on both sides in the width direction of the pin terminal, and the first grooves on both sides of the pin terminal are arranged staggeredly along the first direction, avoiding excessive narrowing of the width of the pin terminal at this position and reduction of the current-carrying area when the first grooves on both sides in the width direction of the pin terminal are symmetrical. This technical solution can ensure that even if multiple first grooves are provided on the pin terminal, the change in the current-carrying area will not be too large. In addition, the staggered first grooves break the symmetrical stress line, improving the uniformity of the stress distribution of the glue layer, and the first grooves extend along the thickness direction of the pin terminal, which is more conducive to production and processing.

[0041] Technical Solution XV and its preferred embodiments have the technical advantages of any one of Technical Solutions I to XIV. The sealing glue is filled into the gap between the pin terminal and the first wall from the potting glue. After the glue solidifies, a continuous sealing body is formed to block the intrusion of external moisture and foreign objects.

[0042] Technical Solution XVI and its preferred embodiments have the technical advantages of Technical Solution XV.

[0043] In Technical Solution XVII and its preferred embodiments, the pin terminal is in limit fit with the through hole at least in the thickness direction, ensuring the structural stability after the pin terminal is inserted into the housing of the outer shell and avoiding the deviation of the glue filling path.

[0044] In Technical Solution 18 and its preferred embodiments, the through hole is provided with a first hole and a second hole along a first direction. The first hole is located on the side of the second hole away from the potting groove along the first direction. In the thickness direction and / or width direction of the pin terminal, the size of the first hole is larger than that of the second hole. The pin terminal forms a limiting fit relationship with the second hole, so that the pin terminal has good stability. Especially when the part of the pin terminal exposed from the first wall is stressed, it can ensure that the pin terminal has good stability relative to the relay housing. A larger gap is formed between the first hole and the pin terminal, so that more glue can be filled, and even the pin terminal can be wrapped in the entire circumferential direction, so that the pin terminal can be stably fixed and sealed on the relay housing. Along the first direction, one end of the diversion channel is located in the first hole, and the other end is located in the potting groove. The glue can reliably flow from the potting groove through the diversion channel and into the second hole through the first hole, ensuring that the connection strength between the pin terminal and the through hole can be strengthened, and the fixing strength and sealing reliability of the pin terminal can be improved.

[0045] In Technical Solution 19 and its preferred embodiments, the hole wall of the second hole for limiting fit with the pin terminal is provided with a notch; the notch extends along the first direction and divides the hole wall into at least two parts. The notch allows the glue to flow into the through hole and accommodate the glue, which is beneficial to improving the fixing strength and sealing strength of the pin terminal. And because the pin terminal is at least in the thickness direction and is in limiting fit with the through hole, the notch at least corresponds to the surface on at least one side in the thickness direction of the pin terminal. Compared with the notch corresponding to at least one side in the width direction of the pin terminal, the contact area between the glue and the pin terminal is larger, and the fixing strength between the pin terminal and the housing is greater. When filling the glue, the glue can gradually enter the through hole to fill the notch based on the siphon effect, so that the surface of the pin terminal and the part inserted into the through hole are both fixed to the housing through the solidified glue. The structure of the pin terminal is stable and reliable. And because the relay housing is generally made of plastic material, during the injection molding process of the housing, internal stress is generated due to the volume shrinkage when the molten plastic cools. The notch can provide a buffer space for the material shrinkage, allowing the housing to shrink directionally during cooling, avoiding deformation or cracking caused by stress concentration, and also avoiding the hole wall of the second hole for limiting fit with the pin terminal from being deformed too much to form a reliable positioning and limiting effect.

[0046] In Technical Solution 20 and its preferred embodiments, the second glue groove is communicated with the through hole through the first glue groove. Therefore, when filling the glue, only need to pour the glue into the second glue groove. After the glue flows into the second glue groove, it will flow into the first glue groove and the through hole due to the siphon effect, so there is no need to apply glue to each pin terminal separately, and the glue application process is simpler; the cross-sectional area of the first glue groove gradually increases along the direction away from the through hole. When filling the glue, the glue volume of the first glue groove is large, which is beneficial to improving the fixing and sealing effects on the pin terminal. In addition, it is also beneficial for the first glue groove to guide the glue into the through hole.

[0047] In Technical Solution 21 and its preferred embodiments, the side wall of the housing and the first wall of the base enclose to form a second glue groove, which is more conducive to dispensing operation on the one hand and can also achieve the sealing between the base and the housing on the other hand. Description of the Drawings

[0048] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0049] Figure 1 Stereoscopic schematic diagram of the relay according to the embodiment of the present application;

[0050] Figure 2 is Figure 1 top view of;

[0051] Figure 3 is Figure 2 cross-sectional view in the A-A direction;

[0052] Figure 4 is Figure 3 enlarged schematic diagram of part A of;

[0053] Figure 5 Schematic diagram of the relay hiding the housing according to the embodiment of the present application;

[0054] Figure 6 is Figure 5 cross-sectional view in the B-B direction;

[0055] Figure 7 Schematic diagram of the pin terminal in an implementation manner of the present application;

[0056] Figure 8 is Figure 7 enlarged schematic diagram of part B of;

[0057] Figure 9 Schematic diagram of the pin terminal in another implementation manner of the present application;

[0058] Figure 10 Schematic diagram of the pin terminal in another implementation manner of the present application;

[0059] Figure 11 Schematic diagram of the pin terminal in another implementation manner of the present application;

[0060] Figure 12 Schematic diagram of the pin terminal in another implementation manner of the present application.

[0061] Main reference numeral description:

[0062] Relay housing 100; base 10; first wall 11; through hole 111; first hole 112; second hole 113; notch 1131; limiting hole 114; potting groove 20; first glue groove 21; second glue groove 22; cover 12; magnetic circuit part 31; pushing part 32; moving contact 33; static contact 34; pin terminal 40; body 41; joint part 42; auxiliary fixing part 43; connecting part 44; protrusion 441; diversion surface 4411; diversion branch 442; diversion channel 443; first groove 45; glue-containing groove 46. Detailed implementation manners

[0063] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the preferred embodiments of the present invention and should not be regarded as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0064] In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., are used to distinguish different objects and not to describe a specific order.

[0065] In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, for orientation terms, when using terms such as "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. to indicate the orientation or position relationship, it is based on the orientation and position relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it should not be construed as limiting the specific protection scope of the present invention.

[0066] In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, when using the terms "fixed connection" or "fixedly connected", should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two, that is, including non-detachable fixed connection, detachable fixed connection, being integrally formed, and being fixed connected through other devices or elements.

[0067] In the claims, the description and the above-mentioned drawings of the present invention, when using terms such as "comprising", "having" and their variants, are intended to mean "including but not limited to".

[0068] See Figures 1-6 , Figure 1Shows a three-dimensional schematic diagram of the relay, Figure 2 shows a top view of the relay, Figures 3-4 shows a cross-sectional view of the relay in one direction, Figure 5 shows a partial side view of the relay, Figure 6 shows a cross-sectional view of the relay in another direction. The relay includes a relay housing 100 and a relay body. The relay body is provided with pin terminals 40, and the pin terminals 40 are installed on the relay housing 100 through a pin terminal sealing structure. The pin terminal sealing structure includes a pin terminal mounting structure and a sealant (not shown in the figure). The pin terminal mounting structure is used to mount the pin terminals 40 to the first wall 11 of the relay housing 100, and the sealant is filled between the pin terminals 40 and the first wall 11.

[0069] The structure of the relay housing 100 will be introduced first below.

[0070] See Figures 2-6 , the relay housing 100 is provided with a first wall 11. The first wall 11 is provided with a through hole 111 for the pin terminals 40 to penetrate. The outer surface of the first wall 11 has a potting groove 20 communicating with the through hole 111. In this embodiment, the pin terminals 40 penetrate the through hole 111 along the first direction. See Figures 3-4 , the through hole 111 is provided with a first hole 112 and a second hole 113 along the first direction. The first hole 112 is located on the side of the second hole 113 away from the potting groove 20 along the first direction. In the thickness direction and / or width direction of the pin terminals 40, the size of the first hole 112 is larger than that of the second hole 113. The second hole 113 is in limit fit with the pin terminals 40 at least in the thickness direction of the pin terminals 40, that is, the pin terminals 40 are in limit fit with the through hole 111 at least in the thickness direction. See Figures 5-6 , the hole wall of the second hole 113 for limit fit with the pin terminals 40 is provided with a notch 1131. The notch 1131 extends along the first direction and divides the hole wall into at least two parts. In this embodiment, the second hole 113 is also in limit fit with the pin terminals 40 in the width direction of the pin terminals 40. Two notches 1131 are arranged along the second direction on the two opposite hole walls of the second hole 113 along the third direction.

[0071] See Figures 1-2 and Figure 4 , the potting groove 20 includes a first glue groove 21 and a second glue groove 22. The first glue groove 21 is correspondingly arranged with the through hole 111 and is connected to the outer end of the through hole 111. The second glue groove 22 is communicated with the through hole 111 through the first glue groove 21; See Figure 4 , the cross-sectional area of the first glue groove 21 gradually increases along the direction away from the through hole 111. Exemplarily, see Figures 2-4, the relay housing 100 includes a base 10 and a cover 12. The base 10 is provided with a first wall 11. The cover 12 is sleeved outside the relay body and the base 10. A first glue groove 21 is provided on the first wall 11. The side wall of the cover 12 and the first wall 11 of the base 10 enclose a second glue groove 22. Specifically, a groove is provided on the peripheral edge of the outer surface of the first wall 11 of the base 10. The side wall of the cover 12 is sleeved outside the groove and cooperates with the groove to form the second glue groove 22. In this embodiment, refer to Figure 4 , the notch of the first glue groove 21 is opened on the bottom wall of the potting groove 20. It should be understood that in other embodiments, the second glue groove 22 can also be directly formed on the first wall 11 of the base 10. The sealant can be filled from the potting groove 20 between the pin terminals 40 and the first wall.

[0072] Refer to Figure 3 and Figure 5 , the relay body includes a magnetic circuit part 31, a pushing part 32 and a contact part. The magnetic circuit part 31, the pushing part 32 and the contact part all belong to the prior art. Exemplarily, the magnetic circuit part 31 includes a coil assembly and an armature assembly. The coil assembly includes a coil bobbin, a coil winding, an iron core, signal terminals and two yokes. The coil bobbin is fixedly installed on the relay housing 100, which includes a winding shaft extending in the first direction and retaining walls located at both ends of the winding shaft. The coil winding is wound around the winding shaft. The iron core penetrates the winding shaft and is fixedly connected to the two yokes at both ends respectively. The two yokes respectively form two magnetic driving ends arranged in the first direction. The armature assembly rotates relative to the coil assembly around a rotation axis extending in the second direction. The armature assembly includes a permanent magnet, two armatures and an insulating member. The two armatures are respectively fixedly connected to the two magnetic poles of the permanent magnet. Each armature is respectively provided with a suction part adapted to be attracted to the magnetic driving end. The insulating member wraps the two armatures and the permanent magnet into a whole. In the magnetic holding state of the magnetic circuit part 31, one suction part of each of the two armatures is attracted to the corresponding magnetic driving end to form a closed magnetic circuit passing through the two magnetic driving ends. The pushing part 32 is connected to the insulating member of the armature assembly and extends in the third direction. The contact part includes a moving contact 33 connected to the pushing part 32 and two static contacts 34 fixed relative to the coil assembly. The moving contact 33 is located between the two static contacts 34 in the third direction. The coil assembly is used to receive an external pulsed electrical signal and generate a magnetic excitation after being energized to drive the movement of the armature assembly. The armature assembly drives the moving contact 33 to move through the pushing part 32 to realize the closing or opening of the moving contact 33 and different static contacts 34. In this embodiment, both the moving contact 33 and the static contacts 34 are provided with pin terminals 40, that is, the relay body is provided with pin terminals 40. It should be understood that the above coil assembly and armature assembly are only provided as an example, and the actual form may not be limited to the above, and it can also be other forms. In addition, the pin terminals 40 can also be a part of the coil terminals or the auxiliary switch terminals.

[0073] Refer to Figure 7 ,Figure 7 A schematic diagram of a pin terminal according to an embodiment is shown. The pin terminal 40 includes a body 41 and a joint portion 42 passing through the through hole 111. Figure 7 In [description], the pin terminal 40 is further provided with an auxiliary fixing portion 43 integrally connected to the body 41. Exemplarily, the body 41 is flat and has a length direction (first direction), a width direction (second direction), and a thickness direction (third direction). It should be noted that the width direction referred to in the present invention is specifically the extending direction of the long side in the cross-section perpendicular to the length direction of the pin terminal, and the thickness direction is the extending direction of the short side in this cross-section. This is because the cross-section of the pin terminal in the present invention is actually rectangular. In other possible embodiments, the cross-section of the pin terminal can also be square. At this time, the concepts of long side and short side no longer exist, and the width direction and thickness direction of the pin terminal are respectively the extending directions of two adjacent sides. The joint portion 42 and the auxiliary fixing portion 43 also have the same directions as the length direction, width direction, and thickness direction of the body 41. Among them, the length direction of the body 41 is consistent or substantially consistent with the extending direction of the through hole 111. The width of the body 41 is greater than the widths of the joint portion 42 and the auxiliary fixing portion 43. The joint portion 42 and the auxiliary fixing portion 43 are arranged along the width direction of the body 41 and are respectively located at both ends of the body 41. Correspondingly, referring to Figures 1-2 , a limiting hole 114 for the auxiliary fixing portion 43 to pass through along the first direction is provided on the first wall 11 of the base 10. In some embodiments, the auxiliary fixing portion 43 can also form a certain pre-tightening force with the limiting hole 114, so that the part of the pin terminal 40 passing through the relay housing 100 will also be kept in a stable state due to the limitation of the auxiliary fixing portion 43 before the glue filling. In this embodiment, the length of the auxiliary fixing portion 43 is less than the length of the joint portion 42 to avoid interference during the connection between the relay and the outside and ensure insulation.

[0074] Also referring to Figure 8 , Figure 8 Shows Figure 7 An enlarged schematic diagram of part B. The pin terminal 40 is provided with a connection portion 44. In this embodiment, the connection portion 44 is provided on the joint portion 42. Referring to Figure 4 , connection portions 44 are provided on both sides of the pin terminal 40 in the thickness direction. Still referring to Figure 4 And and Figure 8, the connecting portion 44 is provided with a diversion channel 443, and at least a part of the diversion channel 443 is used to communicate with the through hole 111 and the potting groove 20. In this embodiment, at least a part of the diversion channel 443 is used to communicate with both ends of the pin terminal 40 in the width direction. In other embodiments, at least a part of the diversion channel 443 is also used to communicate with both ends of the pin terminal 40 in the thickness direction, or at least a part of the diversion channel 443 is also used to communicate with both ends of the pin terminal 40 in the width direction and the thickness direction, that is, at least a part of the diversion channel 443 is also used to communicate with both ends of the pin terminal 40 in the width direction and / or the thickness direction. Refer to Figure 4 , along the first direction, one end of the diversion channel 443 is located in the first hole 112, and the other end is located in the potting groove 20. Still refer to Figure 8 , the connecting portion 44 is provided with a plurality of protrusions 441, and at least some of the protrusions 441 are spaced apart from each other to form the diversion channel 443; a sloping diversion surface 4411 is provided on one side of the protrusion 441 facing the outer surface of the first wall 11 of the potting groove 20.

[0075] In this embodiment, refer to Figure 8 , all the protrusions 441 are spaced apart from each other and communicate to form a plurality of intersecting diversion branches 442, and each diversion branch 442 communicates to form the diversion channel 443; the diversion surface 4411 forms a part of the diversion channel 443. Refer to Figure 4 , at least some of the protrusions 441 in the connecting portion 44 are located in the potting groove 20, and some of the protrusions 441 are located in the through hole 111 and are opposite to the hole wall of the through hole 111 so that the diversion channel 443 communicates with the through hole 111 and the potting groove 20. In this embodiment, the portions of the pin terminal 40 located in the first hole 112, the second hole 113, the first glue groove 21, and the second glue groove 22 are all correspondingly provided with protrusions 441. In this embodiment, each diversion branch 442 is inclined relative to the first direction. Exemplarily, the included angle between the diversion branch 442 and the first direction is 30-60°.

[0076] Refer to Figure 8 , for the portions of the pin terminal 40 for extending into the potting groove 20 and the through hole 111, at least one first groove 45 is respectively provided on at least one side in the width direction. In this embodiment, at least one first groove 45 is respectively provided on both sides of the pin terminal 40 in the width direction. In this embodiment, the first groove 45 is provided on the joint portion 42, the first groove 45 extends along the thickness direction of the pin terminal 40, and the first grooves 45 on both sides of the pin terminal 40 are arranged staggeredly along the length direction of the pin terminal 40.

[0077] In this embodiment, refer to Figure 4 and Figure 8, the pin terminal 40 is further provided with a glue storage groove 46 located in the first glue groove 21 of the potting groove 20. In this embodiment, the glue storage groove 46 is arranged on the joint portion 42. The glue storage groove 46 and the connecting portion 44 are correspondingly arranged on at least one side in the thickness direction of the pin terminal 40. In this embodiment, since the connecting portions 44 are arranged on both sides in the thickness direction of the pin terminal 40, therefore, the glue storage groove 46 is also correspondingly arranged on both sides in the thickness direction of the pin terminal 40, and both ends of the glue storage groove 46 respectively extend to both ends in the width direction of the pin terminal 40, Figure 8 the glue storage groove 46 extends along the width direction of the pin terminal 40. In other embodiments, the glue storage groove 46 may also present other shapes, see Figure 9 , the middle part of the glue storage groove 46 protrudes away from the connecting portion 44 and towards the direction of the potting groove 20 relative to its both ends, and the glue storage groove 46 has a V-shaped structure with the open end facing the body 41. See Figure 10 , Figure 10 shows a schematic diagram of the glue storage groove 46 being serrated. In other embodiments, the glue storage groove 46 may also be located on the connecting portion 44, see Figure 11 , Figure 11 shows a schematic diagram of the glue storage groove 46 being arranged on the connecting portion 44, that is, the pin terminal 40 is further provided with a glue storage groove 46 located on the connecting portion 44, and the glue storage groove 46 communicates with the diversion channel 443. In another embodiment, the glue storage groove 46 may also be located at one end of the connecting portion 44 away from the potting groove 20, see Figure 12 , Figure 12 shows a schematic diagram that the glue storage groove 46 may also be located at one end of the connecting portion 44 away from the potting groove 20, that is, the pin terminal 40 is further provided with a glue storage groove 46 connected to one end of the connecting portion 44 away from the potting groove 20, and the glue storage groove 46 communicates with the diversion channel 443.

[0078] In this embodiment, the connecting portion 44 is provided with a diversion channel 443. At least a part of the diversion channel 443 is used to communicate the through hole 111 and the potting groove 20. The diversion channel 443 can guide the glue to flow from the potting groove 20 into the through hole 111. Therefore, even if there is an interference fit between the pin terminal 40 and the through hole 111, the glue can flow into the through hole 111 and fill the gap between the pin terminal 40 and the through hole 111, thereby increasing the connection area between the pin terminal 40 and the through hole 111 and enhancing the connection strength. The glue forms a continuous glue layer through the diversion channel 443 and forms an integral anchoring structure after curing, making the connection between the pin terminal 40 and the first wall 11 more firm. In addition, during the welding and cooling processes of the electrical connection between the pin terminal 40 and the outside, the stress can compress the colloid in the diversion channel 443 and it is not easy to break away. A stable anchoring effect is formed between the colloid and the pin terminal 40, making the glue between the first wall 11 and the pin terminal 40 not easy to break away from the pin terminal 40, thereby improving the long-term cooperation stability between the pin terminal 40 and the housing. In addition, when filling the glue in the pin terminal sealing structure of this technical solution, only need to inject the glue into the potting groove 20 once, and then it can gradually enter the through hole 111 based on the siphon effect to fill the gap between the pin terminal 40 and the hole wall of the through hole 111. The colloid formed after the glue is cured has both a fixing effect and a reliable sealing effect on the pin terminal 40 at the position of the potting groove 20, and has a reliable fixing effect on the pin terminal 40 at the position of the through hole 111. Therefore, the structure of the pin terminal 40 is stable and reliable. And because only one dispensing and drying process is required, the production efficiency is high, it is not easy to generate glue bubbles, and the generation of product defect rate can be reduced.

[0079] In this embodiment, at least a part of the diversion channel 443 is also used to communicate the two ends in the width direction and / or the two ends in the thickness direction of the pin terminal 40. When at least a part of the diversion channel 443 is used to communicate the two ends in the width direction of the pin terminal 40, the diversion channel 443 can guide the glue to diffuse along the width direction of the pin terminal 40 and cover the gap between the side walls at the two ends in the width direction of the pin terminal 40 and the hole wall of the through hole 111. When at least a part of the diversion channel 443 is used to communicate the two ends in the thickness direction of the pin terminal 40, the diversion channel 443 can guide the glue to diffuse along the thickness direction of the pin terminal 40 and cover the gap between the side walls at the two ends in the thickness direction of the pin terminal 40 and the hole wall of the through hole 111. When at least a part of the diversion channel 443 is used to communicate the two ends in the width direction and the two ends in the thickness direction of the pin terminal 40, the glue forms a cross-flow path (such as a mesh diffusion) in the thickness direction and the width direction of the pin terminal 40, covering all potential gaps (width, thickness, edge dead corners) around the pin terminal 40, completely eliminating the sealing blind area, and significantly improving the coverage uniformity and sealing reliability of the glue filling.

[0080] In this embodiment, the connecting portion 44 is provided with protrusions 441, and at least some of the protrusions 441 are spaced apart from each other to form a diversion channel 443; on one side of the protrusions 441 facing the outer surface of the first wall 11, there is an inclined diversion surface 4411. Therefore, the gap between the protrusions 441 can be filled with glue. The protrusions 441 increase the roughness of the surface of the connecting portion 44, increasing the contact area between the glue and the pin terminal 40, enhancing the adhesion of the glue. The protrusions 441 serve as a physical barrier and form a "barb" structure with the glue layer after curing, enhancing the peel strength of the glue layer. The glue layer is not easily peeled off during subsequent processes of high-temperature soldering and cooling of the pin terminal 40. The inclined diversion surface 4411 can guide the glue to flow from the glue filling groove 20 to the through hole 111, and can also promote the glue to advance into the gap between the protrusions 441 and the hole wall of the through hole 111, so that the gap between the protrusions 441 and the hole wall of the through hole 111 is also filled with glue, further enhancing the sealing reliability and connection strength between the pin terminal 40 and the first wall 11.

[0081] In this embodiment, all the protrusions 441 are spaced apart from each other and communicate to form a number of intersecting diversion branches 442, and each diversion branch 442 communicates to form a diversion channel 443, forming a multi-directional glue diffusion path. The protrusions 441 guide the glue to flow preferentially along the diversion branches 442. Even if a certain diversion branch 442 is blocked by impurities, the glue can still be filled through other diversion branches 442, avoiding glue overflow or uneven filling and improving the sealing reliability. The side walls of the protrusions 441 and even the diversion surface 4411 directly serve as part of the wall of the diversion channel 443. The protrusions 441 and the diversion channel 443 are seamlessly integrated in structure. Compared with the split design of the protrusions 441 and the diversion channel 443, it is more conducive to preventing the glue layer from falling off due to vibration or thermal stress, and further forms a micro-gap channel between the relative positions of the protrusions 441 and the hole wall of the through hole 111, which not only allows the glue to penetrate but also restricts the overflow of excessive glue, achieving a balance between filling accuracy and efficiency.

[0082] In this embodiment, each diversion branch 442 is inclined relative to the first direction. The inclined diversion branches 442 can extend the glue flow path, increase the infiltration time of the glue with the contact surface, make the glue filling more uniform, improve the sealing reliability, and the inclined diversion branches 442 change the main direction of the glue flow (when flowing from the glue filling groove 20 to the through hole 111), making it flow along the extension direction of the diversion branches 442, which is more conducive to guiding the glue to penetrate into the relay, improving the sealing reliability, and is also more conducive to promoting the glue to advance into the gap between the protrusions 441 and the hole wall of the through hole 111, so that the gap between the protrusions 441 and the hole wall of the through hole 111 is also filled with glue, further enhancing the sealing reliability and connection strength between the pin terminal 40 and the first wall 11. In addition, the inclined diversion channel 443 extends the water vapor / pollutant penetration path, improving the environmental tolerance.

[0083] In this embodiment, the included angle between the diversion channel 443 and the first direction is 30 - 60°, which can ensure that each intersecting diversion branch 442 has an appropriate inclination angle, enabling uniform filling of the adhesive in each diversion branch 442 and further enhancing the sealing reliability.

[0084] In this embodiment, connection portions 44 are provided on both sides of the pin terminal 40 in the thickness direction. Compared with the connection portions 44 being provided on both sides of the pin terminal 40 in the terminal width direction, the contact area between the adhesive and the pin terminal 40 can be further increased, thereby enhancing the fixing strength between the pin terminal 40 and the first wall 11.

[0085] In this embodiment, the pin terminal 40 is further provided with a glue storage groove 46 located in the potting groove 20. The glue storage groove 46 can serve as a glue storage area in the potting groove 20, compensating for the volume shrinkage of the adhesive during the curing process, avoiding shrinkage cracks, and the glue storage groove 46 further increases the contact area between the adhesive and the pin terminal 40, forming a denser mechanical interlocking structure.

[0086] In this embodiment, the pin terminal 40 is further provided with a glue storage groove 46 located on the connection portion 44. The glue storage groove 46 is communicated with the diversion channel 443. The glue storage groove 46 can serve as a temporary glue storage area, absorbing excess adhesive at the initial stage of glue injection, alleviating the fluctuation of the glue injection pressure, avoiding the generation of air bubbles due to sudden pressure change. During the glue injection process, the glue storage groove 46 forms a glue distribution center, evenly distributing the adhesive to different regions of the diversion channel 443, thereby balancing the glue pressure in different regions of the diversion channel 443 and avoiding uneven filling caused by the length difference in different regions of the diversion channel 443.

[0087] In this embodiment, the pin terminal 40 is further provided with a glue storage groove 46 connected to one end of the connection portion 44 away from the potting groove 20. The glue storage groove 46 is communicated with the diversion channel 443. The glue storage groove 46 can absorb the excess adhesive in the through hole 111 and the potting groove 20, avoiding adverse effects on the interior of the relay.

[0088] In this embodiment, the glue storage groove 46 is correspondingly provided on at least one side of the pin terminal 40 in the thickness direction. Both ends of the glue storage groove 46 extend to both ends of the pin terminal 40 in the width direction, which can enable the adhesive to cover the gap between the side surfaces at both ends of the pin terminal 40 in the thickness direction and the contact surface of the housing, eliminating the risk of edge glue leakage.

[0089] In this embodiment, the middle part of the glue storage groove 46 protrudes towards the glue injection groove 20 relative to its two ends. Therefore, after the glue enters the glue storage groove 46, the glue will preferentially flow along both sides of the glue storage groove 46 to the circumference of the through hole 111 under the drive of the injection pressure, covering the contact surface between the hole wall of the through hole 111 and the pin terminal 40, so as to evenly cover the circumference of the hole wall of the through hole 111, further improving the sealing reliability. After the glue solidifies, an annular anchor is formed at the openings at both ends of the glue storage groove 46 and the edge of the through hole 111, increasing the connection strength.

[0090] In this embodiment, at least one first groove 45 is provided on at least one side in the width direction of the part of the pin terminal 40 for extending into the glue injection groove 20 and the through hole 111. The first groove 45 increases the contact area between the glue and the pin terminal 40, and the first groove 45 forms a mechanical anchor perpendicular to the length direction of the pin terminal 40.

[0091] In this embodiment, first grooves 45 are provided on both sides in the width direction of the pin terminal 40, and the first grooves 45 on both sides of the pin terminal 40 are arranged staggeredly along the first direction, avoiding excessive narrowing of the width of the pin terminal 40 at this position and reduction of the current-carrying area when the first grooves 45 on both sides in the width direction of the pin terminal 40 are symmetrical to each other. This technical solution can ensure that even if multiple first grooves 45 are provided on the pin terminal 40, the change in the current-carrying area will not be too large. In addition, the staggered first grooves 45 break the symmetrical stress line, improving the uniformity of the stress distribution of the glue layer, and the first grooves 45 extend along the thickness direction of the pin terminal 40, which is more conducive to production and processing.

[0092] In this embodiment, the sealant is filled into the gap between the pin terminal 40 and the first wall 11 from the glue injection groove 20, and a continuous seal is formed after the glue solidifies, blocking the intrusion of external moisture and foreign objects.

[0093] In this embodiment, the pin terminal 40 is in limit fit with the through hole 111 at least in the thickness direction, ensuring the structural stability after the pin terminal 40 is inserted into the housing of the shell and avoiding the deviation of the glue filling path.

[0094] In this embodiment, the through hole 111 is provided with a first hole 112 and a second hole 113 along the first direction. The first hole 112 is located on the side of the second hole 113 away from the potting groove 20 along the first direction. In the thickness direction and / or width direction of the pin terminal 40, the size of the first hole 112 is larger than that of the second hole 113. The pin terminal 40 forms a limiting fit relationship with the second hole 113, so that the pin terminal 40 has good stability. Especially when the part of the pin terminal 40 exposed from the first wall 11 is stressed, it can ensure that the pin terminal 40 has good stability relative to the relay housing 100. A larger gap is formed between the first hole 112 and the pin terminal 40, so that more glue can be filled, and even the pin terminal 40 can be wrapped in the entire circumference, so that the pin terminal 40 can be stably fixed and sealed on the relay housing 100. Along the first direction, one end of the diversion channel 443 is located in the first hole 112, and the other end is located in the potting groove 20. The glue can reliably flow from the potting groove 20 through the diversion channel 443 and into the second hole 113 through the first hole 112, ensuring that the connection strength between the pin terminal 40 and the through hole 111 can be enhanced, and the fixing strength and sealing reliability of the pin terminal 40 can be improved.

[0095] In this embodiment, the hole wall of the second hole 113 for limiting fit with the pin terminal 40 is provided with a notch 1131; the notch 1131 extends along the first direction and divides the hole wall into at least two parts. The notch 1131 allows the glue to flow into the through hole 111 and accommodate the glue, so it is beneficial to improve the fixing strength and sealing strength of the pin terminal 40. And because the pin terminal 40 is at least in limiting fit with the through hole 111 in the thickness direction, the notch 1131 at least corresponds to the surface on at least one side in the thickness direction of the pin terminal 40. Compared with the notch 1131 corresponding to at least one side in the width direction of the pin terminal 40, the contact area between the glue and the pin terminal 40 is larger, and the fixing strength between the pin terminal 40 and the housing is greater. When filling the glue, the glue can gradually enter the through hole 111 to fill the notch 1131 based on the siphon effect, so that the surface of the pin terminal 40 and the part inserted into the through hole 111 are both fixed to the housing by the cured glue. The structure of the pin terminal 40 is stable and reliable. And because the relay housing 100 is generally made of plastic material, during the injection molding process of the housing, internal stress is generated due to the volume shrinkage when the molten plastic cools. The notch 1131 provides a buffer space for the material shrinkage, allowing the housing to shrink directionally during cooling, avoiding deformation or cracking caused by stress concentration, and also avoiding the hole wall of the second hole 113 for limiting fit with the pin terminal 40 from being unable to form a reliable positioning and limiting function due to excessive deformation.

[0096] In this embodiment, the second glue groove 22 is communicated with the through hole 111 through the first glue groove 21. Therefore, when filling the glue, only need to pour the glue into the second glue groove 22. After the glue flows into the second glue groove 22, it will flow into the first glue groove 21 and the through hole 111 due to the siphon effect. Thus, there is no need to apply glue to each pin terminal 40 separately, and the glue application process is simpler; the cross-sectional area of the first glue groove 21 gradually increases in the direction away from the through hole 111. When filling the glue, the glue holding volume of the first glue groove 21 is large, which is beneficial to enhancing the fixing and sealing effects on the pin terminal 40. In addition, it is more conducive to guiding the glue in the first glue groove 21 to flow into the through hole 111.

[0097] In this embodiment, the side wall of the housing 12 and the first wall 11 of the base 10 enclose to form the second glue groove 22. On the one hand, it is more conducive to the glue application operation, and on the other hand, the sealing between the base 10 and the housing 12 can be realized.

[0098] The descriptions of the above specification and embodiments are used to explain the protection scope of the present invention, but do not constitute a limitation to the protection scope of the present invention. Through the inspiration of the present invention or the above embodiments, those of ordinary skill in the art, combined with common general knowledge, ordinary technical knowledge in the art and / or the prior art, can obtain modifications, equivalent replacements or other improvements to the embodiments of the present invention or some of its technical features through logical analysis, reasoning or limited experiments, which should all be included within the protection scope of the present invention.

Claims

1. A pin terminal mounting structure, used for mounting a pin terminal (40) to a first wall (11) of a relay housing (100), wherein the first wall (11) is provided with a through hole (111) for the pin terminal (40) to pass through, and the outer surface of the first wall (11) is provided with a glue potting groove (20) connected to the through hole (111); wherein: A connecting portion (44) is provided on the side surface of the pin terminal (40), and the connecting portion (44) is provided with a flow guide (443), and the flow guide (443) is at least partially used to connect the through hole (111) and the glue potting groove (20).

2. A pin terminal mounting structure as claimed in claim 1, characterized in that: The flow guide (443) is also at least partially used to connect the two ends of the pin terminal (40) in the width direction and / or the two ends in the thickness direction.

3. A pin terminal mounting structure as claimed in claim 2, characterized in that: The connecting portion (44) is provided with a plurality of protrusions (441), and at least some of the protrusions (441) are spaced apart from each other and form the flow guide channel (443); and an inclined flow guide surface (4411) is provided on one side of the outer surface of the protrusion (441) facing the first wall (11).

4. A pin terminal mounting structure as claimed in claim 3, characterized in that: All of the protrusions (441) are spaced apart from each other and connected to form a plurality of intersecting flow guide branches (442), and the flow guide branches (442) are connected to form the flow guide channel (443); the flow guide surface (4411) forms a part of the flow guide channel (443); at least part of the protrusions (441) in the connecting portion (44) are located in the glue pouring groove (20), and part of the protrusions (441) are located in the through hole (111) and opposite to the hole wall of the through hole (111), so that the flow guide channel (443) connects the through hole (111) and the glue pouring groove (20).

5. A pin terminal mounting structure as claimed in claim 4, characterized in that: The pin terminal (40) passes through the through hole (111) along a first direction, and each flow guiding branch (442) is inclined relative to the first direction.

6. A pin terminal mounting structure as claimed in claim 5, characterized in that: The included angle between the diversion branch (442) and the first direction is 30-60°.

7. A pin terminal mounting structure as claimed in claim 1, characterized in that: The connecting parts (44) are provided on both sides of the pin terminal (40) in the thickness direction.

8. A pin terminal mounting structure as claimed in claim 1, characterized in that: The pin terminal (40) is also provided with a glue containing groove (46) located in the glue potting groove (20).

9. A pin terminal mounting structure as claimed in claim 1, characterized in that: The pin terminal (40) is also provided with a glue containing groove (46) located on the connecting portion (44), and the glue containing groove (46) is communicated with the flow guide channel (443).

10. The pin terminal mounting structure according to claim 1, characterized in that: The pin terminal (40) is further provided with a glue containing groove (46) connected to an end of the connecting portion (44) away from the glue potting groove (20), and the glue containing groove (46) is communicated with the flow guide channel (443).

11. A pin terminal mounting structure according to any one of claims 8 to 10, characterized in that: The glue containing groove (46) and the connecting portion (44) are correspondingly arranged on at least one side of the pin terminal (40) in the thickness direction, and two ends of the glue containing groove (46) respectively extend to two ends of the pin terminal (40) in the width direction.

12. A pin terminal mounting structure as claimed in claim 11, characterized in that: The middle portion of the glue containing groove (46) protrudes relative to its two ends in a direction close to the glue injection groove (20).

13. A pin terminal mounting structure according to claim 1 or 7, characterized in that: The pin terminal (40) is used to extend into the glue potting groove (20) and the through hole (111), and is provided with at least one first groove (45) on at least one side in the width direction.

14. A pin terminal mounting structure as claimed in claim 13, characterized in that: The first groove (45) is provided on both sides of the pin terminal (40) in the width direction. The first groove (45) extends along the thickness direction of the pin terminal (40). The first grooves (45) on both sides of the pin terminal (40) are staggered along the length direction of the pin terminal (40).

15. A pin terminal sealing structure, characterized in that: It comprises the pin terminal installation structure and sealant as described in any one of claims 1 to 14, wherein the sealant is filled between the pin terminal (40) and the first wall (11) from the sealant filling groove.

16. A relay, comprising a relay housing (100) and a relay body (41), wherein the relay body (41) is provided with a pin terminal (40), wherein: The pin terminal (40) is installed on the relay housing (100) through the pin terminal sealing structure described in claim 15, and the relay housing (100) is provided with the first wall (11), and the first wall (11) is provided with a through hole (111) for the pin terminal (40) to pass through, and the outer surface of the first wall (11) has a glue potting groove (20) connected to the through hole (111).

17. A relay as claimed in claim 16, characterized in that: The pin terminal (40) is positionally matched with the through hole (111) at least in the thickness direction.

18. A relay as claimed in claim 17, characterized in that: The pin terminal (40) passes through the through hole (111) along the first direction, and the through hole (111) is provided with a first hole (112) and a second hole (113) along the first direction, the first hole (112) is located on a side of the second hole (113) away from the glue potting groove (20) along the first direction, and in the thickness direction and / or width direction of the pin terminal (40), the size of the first hole (112) is larger than the size of the second hole (113), and the pin terminal (40) and the second hole (113) establish the limiting matching relationship; along the first direction, one end of the flow guide (443) is located in the first hole (112), and the other end thereof is located in the glue potting groove (20).

19. A relay as claimed in claim 18, characterized in that: The second hole (113) is used for limiting the engagement with the pin terminal (40) and is provided with a notch (1131) on its wall; the notch (1131) extends along the first direction and divides the hole wall into at least two parts.

20. A relay as claimed in claim 16, characterized in that: The glue pouring groove (20) comprises a first glue groove (21) and a second glue groove (22); the first glue groove (21) is arranged corresponding to the through hole (111) and is connected to the outer end of the through hole (111); the second glue groove (22) is connected to the through hole (111) through the first glue groove (21); and the cross-sectional area of ​​the first glue groove (21) gradually increases in a direction away from the through hole (111).

21. A relay as claimed in claim 20, characterized in that: The relay housing (100) comprises a base (10) and a cover shell (12); the first wall (11) is arranged on the base (10); the cover shell (12) is sleeved outside the relay body (41) and the base (10); the side wall of the cover shell (12) and the first wall (11) of the base (10) are enclosed to form the second glue groove (22).

Images