Relay

Abstract

The invention discloses a relay, which comprises a base, a shell, a movable spring connecting terminal and a movable part, the shell sleeves the base along a first direction and is fixedly connected with the base; the movable spring connecting terminal is fixedly connected with the base and provided with a connecting part, the connecting part is exposed out of the side wall of one side of the base in the second direction and the first surface of the base in the first direction, and the movable part moves relative to the base in the direction perpendicular to the second direction and at least has a motion component in the first direction and comprises a movable spring connected with the connecting part. The housing is provided with an abdicating groove at least corresponding to the position of the connecting part exposed out of the side wall of the base. The relay is small in size and stable and reliable in operation.

Description

Technical Field

[0001] The present invention relates to the field of relays, and in particular to a relay. Background Art

[0002] Some small relays in the prior art generally include a fixed part, a movable part and a housing. The fixed part includes a base, a coil assembly fixed to the base, a static contact fixed to the base and a moving spring connecting terminal fixed to the base. The two ends of the iron core of the coil assembly protrude from the two ends of the length direction of the upper surface of the base respectively. The static contact is provided with a static contact and a static lead-out terminal electrically connected to the static contact. The static contacts are distributed at the two ends of the length direction of the upper surface of the base. The moving spring connecting terminal is provided with a connecting portion exposed on the upper surface of the base. The movable part includes an armature, a movable spring and an insulator. The movable spring is located on one side of the width direction of the armature. The middle parts of the armature and the movable spring in the length direction are at least partially included by the insulator to form a whole. The two ends of the armature in the length direction cooperate with the iron core of the coil assembly in the form of a seesaw. A hinge part is provided in the middle part of the length direction of the movable spring. The hinge part is fixedly connected to the connecting part. Two movable contacts corresponding to the static contacts are provided at both ends of the movable spring. The two movable contacts are respectively a normally open end movable contact and a normally closed end movable contact. The outer shell is sleeved outside the fixed part and the movable part. In the prior art, the connecting part is completely wrapped in the plastic of the base to reduce the extrusion of the outer shell on the connecting part. However, it is found in practice that the relays of the prior art still have problems such as large size and poor operating stability. Summary of the invention

[0003] The object of the present invention is to overcome the above-mentioned defects or problems existing in the background technology and to provide a relay which has a small size and operates stably and reliably.

[0004] To achieve the above objectives, 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 one and its related embodiments provide a relay, including a base, a shell, a dynamic spring connecting terminal and a movable part; the shell is sleeved on the base along a first direction and fixedly connected to the base; the dynamic spring connecting terminal is fixedly connected to the base and is provided with a connecting portion, the connecting portion is exposed to the side wall of the base on one side of a second direction perpendicular to the first direction and the first surface of the base along the first direction, the movable part moves perpendicularly to the second direction relative to the base and has at least a movement component in the first direction, the movable part includes a dynamic spring connected to the connecting portion, and the shell is provided with a yield groove at least corresponding to the position where the connecting portion is exposed on the side wall of the base.

[0006] Based on Technical Solution 1, Technical Solution 2 is also provided. In Technical Solution 2 and its related embodiments, the side of the give-way groove is a closed structure; on the projection surface perpendicular to the second direction, the area of ​​the notch of the give-way groove is larger than the area of ​​the groove bottom.

[0007] Based on Technical Solution 2, Technical Solution 3 is also provided. In Technical Solution 3 and its related embodiments, the side wall of the give way groove is inclined relative to the second direction, and the give way groove is a square groove.

[0008] Based on any one of technical solutions one to three, a technical solution four is also provided. In technical solution four and its related embodiments, the movable part also includes an armature and an insulator, the width direction of the armature is the second direction, the middle parts of the armature and the movable spring in the length direction are at least partially wrapped by the insulator, the first surface of the base is recessed to form a accommodating groove suitable for accommodating the movable part, and the movable spring connecting terminal is located on the groove side wall on one side of the accommodating groove along the second direction.

[0009] Based on the fourth technical solution, there is also a fifth technical solution. In the fifth technical solution and its related embodiments, the top of the housing opposite to the first surface is also provided with an abutment portion connected to the side wall where the give way groove is located near the give way groove, and the abutment portion is also suitable for abutting the end surface of the groove side wall of the accommodating groove.

[0010] Based on technical solution five, technical solution six is ​​also provided. In technical solution six and its related embodiments, the number of the abutting portions is at least two, and at least two abutting portions are located on both sides of the shell along the second direction.

[0011] Based on Technical Solution 4, Technical Solution 7 is also provided. Technical Solution 7 and its related embodiments also include a coil assembly fixed to the base, wherein the coil assembly is provided with two magnetic pole portions exposed on the first surface of the base and arranged along a third direction, and the third direction is perpendicular to both the first direction and the second direction; a joint portion injection-molded with the insulator is provided in the middle portion of the armature in the length direction, and suction portions corresponding to the magnetic pole portions are respectively provided at both ends of the armature in the length direction; the suction portion and the joint portion are connected as one body; a reinforcement portion is provided at the top of the shell corresponding to a protruding end of each suction portion close to the joint portion.

[0012] Based on Technical Solution 7, Technical Solution 8 is also provided. In Technical Solution 8 and its related embodiments, the reinforcement portion extends along the second direction and connects two side walls of the outer shell that are opposite to each other along the second direction.

[0013] Based on Technical Solution Seven, Technical Solution Nine is also provided. In Technical Solution Nine and its related embodiments, the number of the movable springs and the movable spring connecting terminals are both two, the two movable springs are respectively located on both sides of the armature along the second direction, the two movable spring connecting terminals are respectively located on both sides of the base along the second direction, and the two connecting parts are respectively located on two groove side walls opposite to each other along the second direction of the accommodating groove; the insulator is provided with an insulating part injection-molded with the joint part and the movable spring, and a partitioning part for separating the suction part and the movable spring, and the top of the shell is also protruding with an insulating wall extending between the suction part and the movable spring, and a gap is formed between the partitioning part and the insulating wall along the third direction.

[0014] Based on Technical Solution Nine, Technical Solution Ten is also provided. In Technical Solution Ten and its related embodiments, the projections of the partition portion and the insulating wall on the projection plane perpendicular to the length direction of the armature at least partially overlap; the insulating wall extends along the third direction to the side wall of the shell perpendicular to the third direction.

[0015] Based on technical solution nine, technical solution eleven is also provided. In technical solution eleven and its related embodiments, the movable spring is provided with a positioning portion suitable for extending from one side of the insulating portion along the second direction, and the positioning portion is suitable for being fixedly connected to the connecting portion; the top of the outer shell is provided with a protrusion corresponding to the positioning portion and fixedly connected to the side wall where the clearance groove is located.

[0016] Based on technical solution one, technical solution twelve is also provided. In technical solution twelve and its related embodiments, the dynamic spring connecting terminal is provided with a first bending section, a second bending section and a pin for external electrical connection, and the two ends of the second bending section are respectively connected to the first bending section and the pin as a whole, the first bending section forms the connecting portion, the second bending section is provided with a first side surface perpendicular to the second direction and exposed on one side of the base along the second direction, and a notch opening outward is formed between the first bending section and the second bending section.

[0017] From the above description of the present invention and its preferred embodiments, it can be seen that, compared with the prior art, the technical solution of the present invention and its preferred embodiments have the following beneficial effects due to the adoption of the following technical means:

[0018] The applicant has learned through continuous observation, experimentation and research that the reason why the technical problem of "the relay of the prior art is large in size and poor in operating stability" in the prior art solution is that in the prior art solution, since the connecting part needs to be wrapped in the plastic of the base, the width of the base will increase, which is not conducive to space miniaturization, and although the plastic of the base has a certain buffering and fixing effect, the outer shell will still squeeze the connecting part to a certain extent. For example, in a high temperature environment, the thermal expansion of the outer shell plastic squeezes the connecting part. When the connecting part is squeezed, the reaction force of the dynamic spring hinge will change, and the operating voltage and release voltage of the relay will change; when the connecting part is squeezed in a high temperature environment, the dynamic spring hinge will change. The reaction force affects the operating voltage of the product at high temperature, and in extreme cases there is a risk of failure to operate; if the connection part is deformed (for example, bent toward the inside of the relay) after the movable spring of the movable part is fixedly connected to the movable spring connecting terminal, the hinge part fixed to the connection part will be lateral twisted, resulting in stress concentration. When the mechanical durability test of the movable part is carried out back and forth, fatal defects such as solder joint detachment or hinge breakage may occur; therefore, the position of the connection part will not only affect the quality of the connection between the movable spring of the movable part and the movable spring connecting terminal, but will also seriously affect the reaction force of the relay, the consistency of electrical parameters, etc., thereby causing unstable operation of the relay.

[0019] In technical solution 1 and its preferred embodiments, the connecting part is exposed to the side wall of the base on one side along the second direction and the first surface of the base along the first direction. Compared with the prior art, the plastic of the relay along the second direction can be effectively reduced, which is conducive to the miniaturized design of the relay; the outer shell is provided with a clearance groove at least corresponding to the position where the connecting part is exposed to the side wall of the base, thereby avoiding the problem of the outer side of the connecting part being exposed to the outside and being squeezed and deformed by the outer shell, especially avoiding the extrusion of the connecting part by the outer shell during assembly, glue curing and high temperature environment, effectively ensuring the flatness of the connecting part, avoiding the inclination of the connecting part caused by the extrusion of the outer shell, avoiding the reaction force of the hinge part of the dynamic spring and the change of the electrical parameters of the relay caused by the change of the flatness of the connecting part, improving the first-time qualified rate in the product process and the stability of the relay during operation, and avoiding the lateral bending and stress concentration of the dynamic spring caused by the tilting of the connecting part after the connecting part is squeezed after being fixed to the dynamic spring, thereby effectively improving the mechanical life of the product and further ensuring the stability of the relay operation.

[0020] In technical solution two and its preferred embodiment, the give-way groove is a closed structure. Compared with pulling the side wall of the shell to the opening position of the shell to form a notch, it has the least impact on the strength of the shell. On the projection surface perpendicular to the second direction, the area of ​​the notch of the give-way groove is larger than the area of ​​the bottom of the groove, which is convenient for demolding during mold forming, simplifies the mold structure, and achieves one-time demolding.

[0021] In technical solution three and its preferred embodiment, the side wall of the give-way groove is inclined relative to the second direction, and the give-way groove is a square groove, which is more conducive to production and processing compared to the groove side wall being arc-shaped.

[0022] In technical solution four and its preferred embodiment, the first surface of the base is recessed to form a accommodating groove suitable for accommodating the movable part, and the movable spring connecting terminal is located on the groove side wall on one side of the accommodating groove along the second direction, which is beneficial to reducing the height of the relay along the first direction.

[0023] In the fifth technical solution and its preferred embodiment, when the relay is subjected to high-temperature welding such as wave soldering or reflow soldering, the gas in the space of the shell will expand due to the heat, which will have the effect of squeezing the four sides and the top surface of the shell outward. At the same time, the plastic of the shell will also soften to a certain extent at high temperatures, and the strength will decrease. The setting of the give way groove will also reduce the strength of the shell accordingly. When the shell strength is insufficient, the high temperature during welding will cause the shell surface to bulge severely, and the shell may be squeezed and cracked, which will seriously affect the sealing performance of the relay. In this technical solution, the top of the shell relative to the first surface is also close to the give way groove and is provided with an abutment portion connected to the side wall where the give way groove is located, which effectively increases the strength of the top and side walls of the shell. The abutment portion is also suitable for abutting the end face of the groove side wall of the accommodating groove. On the basis of not interfering with the movement of the movable part, it can not only limit the shell along the first direction, but also effectively increase the strength of the shell. Moreover, setting the abutment portion on the housing can reduce the redundant plastic on the base compared to setting it on the base, and can effectively reduce the problem of plastic-to-metal extrusion deformation caused by the different thermal expansion coefficients between plastic and metal at high temperature, thereby improving the consistency of relay performance.

[0024] In technical solution six and its preferred embodiment, the number of abutment portions is at least two, and at least two abutment portions are located on both sides of the shell along the second direction, which further ensures the reliability of the shell limiting and further increases the strength of the shell.

[0025] In the seventh technical solution and its preferred embodiment, the middle part of the armature in the length direction is provided with a joint part which is injection molded with the insulator. Due to the presence of the insulator, a step is formed between the suction part of the armature and the insulator. Due to the presence of the step, the movable space at this position is larger when the movable part moves. In this solution, a reinforcement part is provided at the top of the housing corresponding to one end of each suction part close to the joint part, which can make full use of the space above the suction part to effectively increase the strength of the top of the housing.

[0026] In technical solution eight and its preferred embodiment, the reinforcement portion extends along the second direction and connects two side walls of the shell opposite to each other along the second direction. Both side walls of the shell opposite to each other along the second direction are provided with a give way groove. The above arrangement further increases the strength of the top of the shell, while increasing the strength of the side walls of the shell, thereby further effectively increasing the strength of the shell.

[0027] In the technical solution nine and its preferred embodiment, the two movable springs and two movable spring connecting terminals are arranged, and the movable part is more balanced on both sides along the second direction; the gap between the suction part of the armature and the movable spring is used to add an insulating wall on the top of the shell. The existence of the insulating wall can not only prevent the contact material from splashing between the armature and the magnetic pole part due to the arc when the contact end disconnects the load, causing the relay to fail to operate reliably, but also improve the strength of the shell. In addition, the insulating wall is formed on the shell, which can reduce the excess plastic on the base compared to forming it on the base, and can effectively reduce the problem of plastic extrusion deformation on metal caused by the different thermal expansion coefficients between plastic and metal at high temperature, thereby improving the consistency of relay performance.

[0028] In technical solution ten and its preferred embodiments, the projections of the partition and the insulating wall on the projection plane perpendicular to the length direction of the armature at least partially overlap, which is more conducive to reducing the space occupied by the relay in the second direction compared to the projections of the partition and the insulating wall on the projection plane perpendicular to the length direction of the armature being staggered along the second direction; the insulating wall extends along the third direction to the side wall of the shell perpendicular to the third direction, which increases the strength of the side wall of the shell, thereby further increasing the strength of the shell.

[0029] In technical solution eleven and its preferred embodiments, the movable spring is provided with a positioning portion suitable for extending from one side of the insulating portion along the second direction, the positioning portion is suitable for being fixedly connected to the connecting portion, thereby realizing the limitation of both sides of the movable part, and this also forms a step between the positioning portion and the insulating portion of the insulator, so that there is a larger space above the positioning portion, and the outer shell is provided with a protrusion fixedly connected to the side wall where the clearance groove is located corresponding to the positioning portion, thereby making full use of the space above the positioning portion, and since the positioning portion is located in the middle of the length direction of the base, the protrusion is also correspondingly arranged in the middle position of the length direction of the outer shell, and corresponds to the middle position of the length direction of the side wall where the clearance groove is located after injection molding of the outer shell. The setting of the protrusion can reduce the deformation of the side wall where the clearance groove is located, and increase the strength of the side wall where the clearance groove is located. At the same time, the protrusion is arranged at the top of the outer shell, and can also increase the strength of the top of the outer shell, thereby effectively improving the overall strength of the outer shell, thereby improving the parameter consistency before and after the outer shell is set, reducing the scrap cost and ensuring the stability of electrical parameters in high temperature environment.

[0030] In technical solution twelve and its preferred embodiments, a notch opening outward is formed between the first bending section and the second bending section. On the one hand, the notch can be filled with more plastic during injection molding, thereby increasing the connection strength between the dynamic spring connecting terminal and the base. On the other hand, the setting of the notch is more conducive to adjusting the position of the first bending section and the second bending section, so that the outer side surface of the connecting part is located outside the first side surface, thereby making the side surface along the second direction smoother after the fixed part is fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 A schematic diagram of a relay according to an embodiment of the present application;

[0033] Figure 2 A schematic diagram of a hidden housing of a relay according to an embodiment of the present application;

[0034] Figure 3 This is a schematic diagram of a dynamic spring connection terminal according to an embodiment of the present application;

[0035] Figure 4 A partial cross-sectional view of the housing of the embodiment of the present application Figure 1 ;

[0036] Figure 5 This is a cross-sectional view of the housing of the embodiment of the present application Figure 2 ;

[0037] Figure 6 A top view of a relay according to an embodiment of the present application;

[0038] Figure 7 for Figure 6 Section view in AA direction;

[0039] Figure 8 for Figure 7 An enlarged schematic diagram of part A;

[0040] Fig. 9 for Figure 6 Cross-sectional view in the BB direction;

[0041] Fig.10 for Figure 6 Cross-sectional view in CC direction;

[0042] Fig.11 This is a partial cross-sectional view of the relay according to the embodiment of the present application.

[0043] Description of main reference numerals:

[0044] Fixed part 100; coil assembly 10; magnetic pole part 11; signal terminal 12; static contact 20; static lead-out end 21; static contact 22; movable spring connecting terminal 30; first bending section 31; connecting part 311; second bending section 32; first side surface 321; pin 33; notch 34; base 40; first surface 41; accommodating groove 42; abutting surface 43; movable part 200; armature 50; engaging part 51; suction part 52; movable spring 60; movable contact 61; positioning part 62; insulator 70; insulating part 71; partition part 72; shell 80; clearance groove 81; abutting part 82; reinforcement part 83; insulating wall 84; protrusion 85. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] In the claims, description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. are for distinguishing different objects rather than for describing a specific order.

[0047] In the claims, specification and the above-mentioned drawings of the present invention, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are 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 direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the present invention.

[0048] In the claims, specification and the above drawings of the present invention, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0049] In the claims, description and drawings of the present invention, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0050] In the claims and the specification except for the embodiments, the terms "first direction", "second direction" and "third direction" only mean that the feature having one of the above directions is perpendicular to the feature having another direction, and do not require that they must be implemented according to the "first direction", "second direction" and "third direction" described in the embodiments. In this embodiment, the third direction is perpendicular to the second direction and the first direction. Exemplarily, the first direction may be the up-down direction, the second direction may be the left-right direction, and the third direction may be the front-back direction.

[0051] See also Figure 1 , Figure 1 A relay is shown, comprising a fixed part 100 , a movable part 200 and a housing 80 .

[0052] See also Figure 2 , Figure 2 The schematic diagram of the fixed part 100 and the movable part 200 is shown. The fixed part 100 includes a coil assembly 10 , a static contact assembly, two dynamic spring connection terminals 30 and a base 40 .

[0053] The coil assembly 10 belongs to the prior art. The coil assembly 10 includes a U-shaped iron core, enameled wire and a coil frame. The two parallel sections of the U-shaped iron core extend along the first direction and are arranged along the third direction. The connecting section of the U-shaped iron core connecting the two parallel sections extends along the third direction and is wound with the enameled wire. The coil frame includes two retaining walls arranged at intervals along the third direction. A winding space is formed between the two retaining walls. The two parallel sections of the U-shaped iron core extend out of the two retaining walls respectively. In actual applications, the two retaining walls are injection molded on the two parallel sections of the U-shaped iron core, and the part of the U-shaped iron core extending out of the retaining walls forms a magnetic pole portion 11, so that the coil assembly 10 is provided with two magnetic pole portions 11 arranged along the third direction. In this embodiment, the coil frame includes a winding shaft extending along the X-axis direction and retaining walls respectively arranged at both ends of the winding shaft. The coil frame is also provided with a signal terminal 12.

[0054] The static contact group includes at least two static contacts 20 . In this embodiment, the static contact group includes four static contacts 20 . Each static contact 20 is provided with a static lead-out terminal 21 and a static contact point 22 .

[0055] See also Figure 3 , Figure 3The schematic diagram of the dynamic spring connection terminal 30 is shown. The dynamic spring connection terminal 30 is provided with a first bending section 31, a second bending section 32 and a pin 33 for electrical connection with the outside. The two ends of the second bending section 32 are respectively connected to the first bending section 31 and the pin 33 as a whole. The first bending section 31 forms a connecting portion 311 connected to the dynamic spring 60 described below. For example, the first bending section 31 is Z-shaped. The first bending section 31 is provided with two extension sections extending along the third direction and a bending portion connecting the two extension sections. The connecting portion 311 is formed away from the second The second bending section 32 is provided with a first side surface 321 perpendicular to the second direction. For example, the second bending section 32 is provided with a bending portion connected to the first bending section 32, a bending portion connected to the pin 33, and an extension extending along the first direction. The first side surface 321 is formed on the extension of the second bending section 32. A notch 34 opening outward is formed between the first bending section 31 and the second bending section 32. In this embodiment, the notch 34 is formed between the extension of the first bending section 31 and the bending portion of the second bending section 32. The pin 33 extends along the first direction.

[0056] See also Figure 2 The base 40 is in a rectangular shape as a whole, with its length direction being the third direction, its width direction being the second direction, and its height direction being the first direction. The base 40 is provided with a first surface 41 on one side along the first direction, and the first surface 41 is also the upper surface, see Figure 6-7 The first surface 41 of the base 40 is recessed to form a receiving groove 42 which opens upward and is suitable for receiving the movable part 200. Figure 2The base 40, the coil assembly 10, the four static lead-out terminals 21 and the two dynamic spring connection terminals 30 are injection molded, wherein the two magnetic pole portions 11 are exposed on the first surface 41 of the base 40 and arranged along the third direction, the four static contacts 22 are exposed on the first surface 41 and are arranged close to the four corners of the first surface 41, the dynamic spring connection terminal 30 is located on the groove side wall on one side of the accommodating groove 42 along the second direction, the two dynamic spring connection terminals 30 are respectively located on both sides of the base 40 along the second direction and the two connecting portions 311 are respectively located on the two groove side walls opposite to each other along the second direction of the accommodating groove 42, and the connecting portion 311 is exposed on the base 4 0 side wall along the second direction and the first surface 41 of the base 40 along the first direction, the second bending section 32 is provided with a first side surface 321 exposed on the side of the base 40 along the second direction, the accommodating groove 42 is located in the middle of the static contact 22, the magnetic pole portion 11 and the connecting portion 311, wherein the end surface of the groove side wall of the accommodating groove 42 is also provided with an abutting surface 43 for abutting with the abutting portion 82 described below near the connecting portion 311, the signal terminal 12, the pin 33 of the dynamic spring connecting terminal 30 and the static lead-out terminal 21 all extend out of the bottom surface of the base 40, and each magnetic pole portion 11 is also located in the middle of the two static contacts 22 on the corresponding side along the second direction. Therefore, the relay includes a coil assembly 10 fixedly connected to the base 40, the coil assembly 10 is provided with two magnetic pole portions 11 exposed on the first surface 41 of the base 40 and arranged along the third direction, and the dynamic spring connecting terminal 30 is fixedly connected to the base 40 and provided with a connecting portion 311.

[0057] See also Figure 2 The movable part 200 moves perpendicularly to the second direction relative to the base 40 and has at least a component of movement in the first direction; the movable part 200 includes an armature 50, two movable springs 60 and an insulator 70. The two movable springs 60 are respectively located on both sides of the armature 50 along the second direction, the width direction of the armature 50 is the second direction, and the middle parts of the armature 50 and the two movable springs 60 in the length direction are at least partially wrapped by the insulator 70 to form the movable part 200. Figure 7 The middle part of the armature 50 in the longitudinal direction is provided with a joint portion 51 which is injection molded with the insulator 70, see Figure 2, the two ends of the armature 50 in the length direction are respectively provided with a suction part 52 corresponding to the magnetic pole part 11, and the suction part 52 is connected to the joint part 51 as a whole; the insulator 70 is provided with an insulating part 71 which is injection-molded with the joint part 51 and the movable spring 60 and a separation part 72 for separating the suction part 52 and the movable spring 60, and the separation part 72 is perpendicular to the second direction. The two ends of the movable spring 60 in the length direction are respectively provided with moving contacts 61 corresponding to the two static contacts 22, and the two moving contacts 61 are respectively a normally open end moving contact 61 and a normally closed end moving contact 61. The middle part of the movable spring 60 in the length direction is provided with a positioning part 62 suitable for extending from one side of the insulating part 71 along the second direction, and the positioning part 62 is suitable for connecting with the connecting part 311. In this embodiment, the positioning part 62 is welded to the connecting part 311, and the positioning part 62 is also the hinge part of the movable spring 60. Therefore, the movable spring 60 is connected to the connecting part 311 and moves perpendicularly to the second direction relative to the base 40 and has at least a movement component in the first direction.

[0058] See also Figure 4-5 and Figure 7-11 The housing 80 is sleeved on the base 40 along the first direction and is fixedly connected to the base 40. Figure 5-8 , the housing 80 is provided with a clearance groove 81 at least corresponding to the position where the connecting portion 311 is exposed from the side wall of the base 40, and the side of the clearance groove 81 is a closed structure. On the projection plane perpendicular to the second direction, the area of ​​the notch of the clearance groove 81 is larger than the area of ​​the groove bottom, and the groove side wall of the clearance groove 81 is inclined relative to the second direction, and the clearance groove 81 is a square groove. When the relay is subjected to high-temperature welding such as wave soldering or reflow soldering, the gas in the space of the housing 80 will expand due to heat, and the four sides and the top surface of the housing 80 will be squeezed outward. At the same time, the plastic of the housing 80 will also soften to a certain extent at high temperatures, and the strength will decrease. The setting of the clearance groove 81 will also reduce the strength of the housing 80 accordingly. When the strength of the housing 80 is insufficient, the high temperature during welding will cause the surface of the housing 80 to bulge severely, and the housing 80 may be squeezed and cracked, which seriously affects the sealing performance of the relay. Therefore, in this embodiment, the structure of the housing 80 is also strengthened.

[0059] Specifically, the top of the housing 80 opposite to the first surface 41 is also provided with a contact portion 82 connected to the side wall where the make way groove 81 is located, near the make way groove 81, and the contact portion 82 is suitable for contacting the end surface of the groove side wall of the accommodating groove 42. The number of the contact portions 82 is at least two, and at least two contact portions 82 are located on both sides of the housing 80 along the second direction. In this embodiment, see Figure 4 and Fig. 9 The number of the abutting portions 82 is two, and each of them is used to abut against two abutting surfaces 43. Fig.10 The top of the housing 80 is provided with a reinforcement portion 83 corresponding to one end of each suction portion 52 close to the joint portion 51, see Figure 4The reinforcing portion 83 extends along the second direction and connects two side walls of the housing 80 that are opposite to each other along the second direction. Fig.11 The top of the housing 80 is also provided with an insulating wall 84 extending between the suction portion 52 and the movable spring 60, and a gap is formed between the partition 72 and the insulating wall 84 along the third direction. The projections of the partition 72 and the insulating wall 84 on the projection plane perpendicular to the length direction of the armature 50 at least partially overlap, and the insulating wall 84 extends along the third direction to the side wall of the housing 80 perpendicular to the third direction. Figure 4 and Figure 7 The top of the housing 80 is provided with a protruding portion 85 corresponding to the positioning portion 62 and fixedly connected to the side wall where the clearance groove 81 is located.

[0060] In this embodiment, the connection portion 311 is exposed on the side wall of the base 40 along the second direction and the first surface 41 of the base 40 along the first direction. Compared with the prior art, the plastic of the relay along the second direction can be effectively reduced, which is conducive to the miniaturization design of the relay; the housing 80 is provided with a clearance groove 81 at least corresponding to the position where the connection portion 311 is exposed on the side wall of the base 40, avoiding the problem of being squeezed and deformed by the housing 80 due to the outer side of the connection portion 311 being exposed to the outside, especially avoiding the squeezing of the connection portion 311 by the housing 80 during assembly, glue curing and high temperature environment, which can effectively ensure that the connection portion 311 is not squeezed. The flatness of 11 can avoid the problem of tilting of the connection part 311 due to the extrusion problem of the shell 80, and can avoid the reaction force of the hinge part (positioning part 62) of the dynamic spring 60 and the change of the electrical parameters of the relay caused by the change of the flatness of the connection part 311, thereby improving the first-time qualified rate in the product process and the stability of the relay during operation. It can also avoid the lateral bending and stress concentration of the dynamic spring 60 caused by the tilting of the connection part 311 after being squeezed after the connection part 311 is fixed to the dynamic spring 60, thereby effectively improving the mechanical life of the product and further ensuring the stability of the relay operation.

[0061] In this embodiment, the give-way groove 81 is a closed structure. Compared with pulling the side wall of the shell 80 to the opening position of the shell 80 to form a groove opening at the opening end of the shell 80, it has the least impact on the strength of the shell 80. On the projection surface perpendicular to the second direction, the area of ​​the notch of the give-way groove 81 is larger than the area of ​​the bottom of the groove, which is convenient for demolding during mold forming, simplifies the mold structure, and achieves one-time demolding.

[0062] In this embodiment, the groove side wall of the clearance groove 81 is inclined relative to the second direction. The clearance groove 81 is a square groove, which is more conducive to production and processing compared to the groove side wall being arc-shaped.

[0063] In this embodiment, the first surface 41 of the base 40 is recessed to form a receiving groove 42 suitable for receiving the movable part 200, and the dynamic spring connecting terminal 30 is located on the groove side wall of the receiving groove 42 along the second direction, which is beneficial to reducing the height of the relay along the first direction.

[0064] In this embodiment, the top of the housing 80 opposite to the first surface 41 is also provided with a contact portion 82 connected to the side wall where the give way groove 81 is located, which effectively increases the strength of the top and side wall of the housing 80 and effectively compensates for the adverse effect of the opening of the give way groove 81 on the housing strength. The contact portion 82 is also suitable for abutting the end surface of the groove side wall of the accommodating groove 42. On the basis of not interfering with the movement of the movable part 200, it can not only limit the housing 80 along the first direction, but also effectively increase the strength of the housing 80 and effectively compensate for the adverse effect of the opening of the give way groove on the housing strength. Moreover, the contact portion 82 is arranged on the housing 80, compared with being arranged on the base 40, it can reduce the redundant plastic on the base 40, and can effectively reduce the problem of plastic extrusion deformation on metal caused by the different thermal expansion coefficients between plastic and metal at high temperature, thereby improving the consistency of relay performance.

[0065] In this embodiment, the number of the abutting portions 82 is at least two, and at least two abutting portions 82 are located on both sides of the shell 80 along the second direction, which further ensures the reliability of limiting the shell 80 and further increases the strength of the shell 80.

[0066] In this embodiment, the middle part of the armature 50 in the length direction is provided with a joint part 51 which is injection molded with the insulator 70. Due to the presence of the insulator 70, a step is formed between the suction part 52 of the armature 50 and the insulator 70. Due to the presence of the step, the movable space at this position is larger when the movable part 200 is in motion. In this solution, a reinforcing part 83 is provided at the top of the housing 80 corresponding to one end of each suction part 52 close to the joint part 51, which can make full use of the space above the suction part 52 to effectively increase the top strength of the housing 80.

[0067] In this embodiment, the reinforcing portion 83 extends along the second direction and connects two side walls of the outer shell 80 that are opposite to each other along the second direction. The two side walls of the outer shell 80 that are opposite to each other along the second direction are both provided with a make way groove 81. The above arrangement further increases the strength of the top of the outer shell 80, while increasing the strength of the side walls of the outer shell 80, thereby further effectively increasing the strength of the outer shell 80.

[0068] In this embodiment, the two movable springs 60 and the two movable spring connecting terminals 30 are provided, so that the movable part 200 is more balanced on both sides along the second direction; the insulating wall 84 is added to the top of the housing 80 by utilizing the gap between the suction part 52 of the armature 50 and the movable spring 60. The existence of the insulating wall 84 can not only prevent the relay from being unable to operate reliably due to the contact material splashing between the armature 50 and the magnetic pole part 11 caused by the arc when the contact end disconnects the load, but also improve the strength of the housing 80. In addition, the insulating wall 84 is formed on the housing 80, which can reduce the redundant plastic on the base 40 compared to forming it on the base 40, and can effectively reduce the problem of plastic extrusion deformation on metal caused by the different thermal expansion coefficients between plastic and metal at high temperature, thereby improving the consistency of relay performance.

[0069] In this embodiment, the projections of the partition 72 and the insulating wall 84 on the projection plane perpendicular to the length direction of the armature 50 at least partially overlap, which is more conducive to reducing the occupied space of the relay in the second direction compared to the projections of the partition 72 and the insulating wall 84 on the projection plane perpendicular to the length direction of the armature 50 being staggered along the second direction. The insulating wall 84 extends along the third direction to the side wall of the housing 80 perpendicular to the third direction, increasing the strength of the side wall of the housing 80, thereby further increasing the strength of the housing 80.

[0070] In this embodiment, the movable spring 60 is provided with a positioning portion 62 suitable for extending from one side of the insulating portion 71 along the second direction. The positioning portion 62 is fixedly connected to the connecting portion 311, so as to achieve the limitation of both sides of the movable part 200. Moreover, a step is formed between the positioning portion 62 and the insulating portion 71 of the insulator 70, so that there is a large space above the positioning portion 62. The housing 80 is provided with a protrusion 85 fixedly connected to the side wall where the paving groove 81 is located, corresponding to the positioning portion 62, so as to make full use of the space. Moreover, since the positioning portion 62 is located in the middle of the length direction of the base 40, the protrusion 85 is 5 is also correspondingly arranged at the middle position of the length direction of the shell 80, and corresponds to the middle position of the length direction of the side wall where the make way groove 81 is located after the shell 80 is injection molded. The arrangement of the protrusion 85 can reduce the deformation of the side wall where the make way groove 81 is located and improve the strength of the side wall where the make way groove 81 is located. At the same time, the protrusion 85 is arranged at the top of the shell, which can also increase the strength of the top of the shell 80, thereby effectively improving the overall strength of the shell 80, thereby improving the parameter consistency of the shell 80 before and after the installation, reducing the scrapping cost and ensuring the stability of the electrical parameters in a high temperature environment.

[0071] In this preferred embodiment, a notch 34 opening outward is formed between the first bending section 31 and the second bending section. On the one hand, the notch 34 can be filled with more plastic during injection molding, thereby increasing the connection strength between the dynamic spring connecting terminal 30 and the base 40. On the other hand, the setting of the notch 34 is more conducive to adjusting the position of the first bending section 31 and the second bending section 32, so that the outer side surface of the connecting portion 311 is located outside the first side surface 321, so that the side surface along the second direction of the fixing part 100 is smoother after being fixed.

[0072] The description of the above specification and embodiments is used to explain the protection scope of the present invention, but does not constitute a limitation on the protection scope of the present invention. Through the enlightenment of the present invention or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent substitutions or other improvements to the embodiments of the present invention or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the present invention.

Claims

1. A relay, characterized in that: The invention comprises a base (40), a shell (80), a movable spring connection terminal (30) and a movable part (200); the shell (80) is sleeved on the base (40) along a first direction and fixedly connected to the base (40); the movable spring connection terminal (30) is fixedly connected to the base (40) and is provided with a connection portion (311); the connection portion (311) is exposed from a side wall of the base (40) along a second direction perpendicular to the first direction and a first surface (41) of the base (40) along the first direction; the movable part (200) moves relative to the base (40) perpendicularly to the second direction and has at least a movement component in the first direction; the movable part (200) comprises a movable spring (60) connected to the connection portion (311); the shell (80) is provided with a clearance groove (81) at least corresponding to a position where the connection portion (311) is exposed from the side wall of the base (40).

2. A relay as claimed in claim 1, characterized in that: The side of the clearance groove (81) is a closed structure; on the projection plane perpendicular to the second direction, the area of ​​the notch of the clearance groove (81) is larger than the area of ​​the groove bottom.

3. A relay as claimed in claim 2, characterized in that: The groove side wall of the clearance groove (81) is inclined relative to the second direction, and the clearance groove (81) is a square groove.

4. A relay according to any one of claims 1 to 3, characterized in that: The movable part (200) further comprises an armature (50) and an insulator (70), the width direction of the armature (50) being the second direction, the middle parts of the armature (50) and the movable spring (60) in the length direction being at least partially wrapped by the insulator (70), the first surface (41) of the base (40) being recessed to form a receiving groove (42) suitable for receiving the movable part (200), and the movable spring connecting terminal (30) being located on a groove side wall of the receiving groove (42) on one side along the second direction.

5. A relay as claimed in claim 4, characterized in that: The top of the shell (80) opposite to the first surface (41) is also provided with an abutment portion (82) close to the clearance groove (81) and connected to the side wall where the clearance groove (81) is located. The abutment portion (82) is also suitable for abutting the end surface of the groove side wall of the accommodating groove (42).

6. A relay as claimed in claim 5, characterized in that: The number of the abutting portions (82) is at least two, and at least two abutting portions (82) are located on both sides of the housing (80) along the second direction.

7. A relay as claimed in claim 4, characterized in that: The invention also comprises a coil assembly (10) fixedly connected to the base (40), wherein the coil assembly (10) is provided with two magnetic pole portions (11) exposed on the first surface (41) of the base (40) and arranged along a third direction, wherein the third direction is perpendicular to both the first direction and the second direction; a joint portion (51) injection-molded with the insulator (70) is provided in the middle of the length direction of the armature (50); and suction portions (52) corresponding to the magnetic pole portions (11) are respectively provided at both ends of the length direction of the armature (50); the suction portions (52) and the joint portion (51) are connected as a whole; and a reinforcement portion (83) is provided at the top of the housing (80) corresponding to one end of each suction portion (52) close to the joint portion (51) and protruding.

8. A relay as claimed in claim 7, characterized in that: The reinforcing portion (83) extends along the second direction and connects two side walls of the housing (80) that are opposite to each other along the second direction.

9. A relay as claimed in claim 7, characterized in that: The number of the movable spring (60) and the movable spring connecting terminal (30) are both two, the two movable springs (60) are respectively located on both sides of the armature (50) along the second direction, the two movable spring connecting terminals (30) are respectively located on both sides of the base (40) along the second direction, and the two connecting portions (311) are respectively located on two groove side walls of the accommodating groove (42) that are opposite to each other along the second direction; the insulator (70) is provided with an insulating portion (71) that is injection-molded with the joint portion (51) and the movable spring (60) and a partition portion (72) for separating the suction portion (52) and the movable spring (60), and the top of the housing (80) is also provided with an insulating wall (84) that protrudes into between the suction portion (52) and the movable spring (60), and a gap is formed between the partition portion (72) and the insulating wall (84) along the third direction.

10. A relay as claimed in claim 9, characterized in that: The projections of the partition (72) and the insulating wall (84) on a projection plane perpendicular to the length direction of the armature (50) at least partially overlap; the insulating wall (84) extends along a third direction to a side wall of the housing (80) perpendicular to the third direction.

11. A relay as claimed in claim 9, characterized in that: The movable spring (60) is provided with a positioning portion (62) adapted to extend from one side of the insulating portion (71) along the second direction, and the positioning portion (62) is adapted to be fixedly connected to the connecting portion (311); and a protruding portion (85) is provided on the top of the housing (80) corresponding to the positioning portion (62) and fixedly connected to the side wall where the clearance groove (81) is located.

12. A relay as claimed in claim 1, characterized in that: The movable spring connection terminal (30) is provided with a first bending section (31), a second bending section (32) and a pin (33) for external electrical connection; the two ends of the second bending section (32) are respectively connected to the first bending section (31) and the pin (33) as a whole; the first bending section (31) forms the connecting portion (311); the second bending section (32) is provided with a first side surface (321) perpendicular to the second direction and exposed on one side of the base (40) along the second direction; and a notch (34) opening outwards is formed between the first bending section (31) and the second bending section (32).

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