Dry reed relay

Abstract

The utility model discloses a dry reed relay, which comprises a shell, a base, a coil rack and a dry reed switch, and is characterized in that the coil rack comprises a winding tube wound with a coil and two flange parts, and the two flange parts are respectively arranged at two ends of the winding tube; the coil rack is fixed on the base, and the reed switch is arranged in the coil rack in a penetrating manner; an opening is formed in one side of the shell, the coil rack, the reed switch and the base are located in the shell, and the base is close to or located at the opening of the shell; the coil rack is fixedly connected with the shell, and the base is in clearance fit with the shell. According to the utility model, the pedestal and the housing can be indirectly and relatively fixed through the coil rack, and a stress effect on the pedestal caused by direct contact connection of the pedestal and the housing can be avoided, so that buckling deformation of the pedestal is avoided, and the risk of damaging the sealing performance of the reed switch is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a reed relay. Background Art

[0002] A reed relay is a relay that uses the magnetic field generated by the current passing through the coil to directly magnetize the reed switch and make it turn on or off. Compared with electromagnetic relays, the biggest feature of reed relays is that the contacts are completely sealed. Reed relays are widely used because of their simple structure, fast action speed, high sensitivity, stable operation, and long contact life.

[0003] At present, the reed relay of the prior art usually includes a base, a coil frame, a reed switch and a shell. The coil frame is fixed on the base, the reed switch is inserted into the coil frame, and the shell is fixedly connected to the base. Specifically, the reed switch includes a glass tube and two reeds installed in the glass tube and capable of contacting or disengaging from each other. The glass tube is inserted into the coil frame, and the lead ends of the two reeds are respectively inserted from the sintered parts at both ends of the glass tube, and are respectively electrically connected to the lead pins correspondingly arranged on the base. The base serves as the positioning base of the product. Since the shell and the base of the reed relay are usually fixed by a snap connection, stress will be generated on the base, causing the base to warp and deform. Once the base is warped and deformed, the stress generated by the warping and deformation of the base is directly transmitted to the sintered part of the glass tube of the reed switch through the lead ends of the reeds. The sintered part of the glass tube is very fragile and is prone to micro-cracks or even ruptures, thereby posing a risk of damaging its sealing. Utility Model Content

[0004] The utility model aims at the technical problems existing in the prior art and provides a reed relay, which prevents the shell from generating stress on the base by fixedly connecting the shell and the coil frame.

[0005] The utility model adopts the following technical solution to solve the technical problem: a reed relay, comprising a housing, a base, a coil frame and a reed switch, the coil frame comprising a bobbin wound with a coil and two flanges, the two flanges being respectively arranged at the two ends of the bobbin; the coil frame is fixed on the base, and the reed switch is inserted into the coil frame; an opening is arranged on one side of the housing, the coil frame, the reed switch and the base are located in the housing, and the base is close to or located at the opening of the housing; the coil frame is fixedly connected to the housing, and the base is clearance-matched with the housing.

[0006] Furthermore, a limiting structure is provided on the inner surface of the shell, and the limiting structure has at least one group of limiting surfaces, each group of limiting surfaces includes two limiting surfaces arranged opposite to each other in the length direction or width direction of the shell, and the two limiting surfaces are abutted against at least one flange portion of the coil frame.

[0007] Furthermore, the two limiting surfaces are distributed along the length direction of the shell, the two flange portions are located between the two limiting surfaces, and the two limiting surfaces are respectively abutted against the opposite outer side surfaces of the two flange portions of the coil frame.

[0008] Furthermore, the limiting structure includes at least two groups of limiting surfaces, and the at least two groups of limiting surfaces are distributed along the width direction of the shell.

[0009] Furthermore, the limiting structure includes at least one positioning groove provided on the inner surface of the shell, and two opposite groove side surfaces of the positioning groove constitute the two limiting surfaces.

[0010] Furthermore, the positioning groove is formed by the interval between two ribs arranged in parallel on the inner surface of the shell, or the positioning groove is formed by a groove opened on the inner side surface of the shell.

[0011] Furthermore, the two convex ribs are located on the inner side surface of the shell, and each convex rib extends along the height direction of the shell.

[0012] Furthermore, glue is poured into the shell, and the base is provided with a glue injection port; the glue injection port is located in the middle of the base; the two ends of the coil are electrically connected to the first lead pins correspondingly arranged on the base; the two tongue reed lead ends of the reed switch are electrically connected to the second lead pins correspondingly arranged on the base.

[0013] Furthermore, there are multiple glue injection ports, and the multiple glue injection ports are distributed at intervals along the length direction of the base.

[0014] Furthermore, one or more exhaust notches are provided at the edge of the base; the multiple exhaust notches are divided into two groups, and the exhaust notches of each group are respectively located at two ends of the base in the axial direction of the coil frame.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. Since the coil frame is fixedly matched with the shell, and the base and the shell are loosely matched, the utility model can not only indirectly fix the base and the shell relatively through the coil frame, but also avoid the stress on the base caused by direct contact and connection between the base and the shell, thereby avoiding warping and deformation of the base, thereby reducing the risk of damaging the sealing of the reed switch.

[0017] 2. The limiting structure includes at least one positioning groove on the inner surface of the shell, so that the limiting structure is simple and easy to process. The number of limiting surfaces is at least two groups, and the limiting effect of the shell on the coil frame is more reliable and stable.

[0018] 3. Since the positioning groove is formed by the interval between two convex ribs arranged in parallel on the inner surface of the shell, the convex rib can also constitute the reinforcing rib of the shell, thereby greatly improving the strength of the shell. In particular, each convex rib extends along the height direction of the shell, making it easier to demould the shell during injection molding.

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the reed relay of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0021] Figure 2 It is a bottom view of the utility model;

[0022] Figure 3 yes Figure 2 AA section view;

[0023] Figure 4 yes Figure 2 BB cross-sectional view;

[0024] Figure 5 This is a schematic diagram of the structure of the housing and the coil frame of the utility model in the combined state Figure 1 ;

[0025] Figure 6 This is a schematic diagram of the structure of the housing and the coil frame of the utility model in the combined state Figure 2 ;

[0026] Figure 7 It is a schematic diagram of the three-dimensional structure of the utility model before the housing is installed;

[0027] In the figure, 1. base, 11. glue injection port, 12. exhaust slot, 2. reed switch, 21. glass tube, 22 / 23 reed lead end, 3. coil frame, 31. winding tube, 32. flange part, 4. coil, 5. first lead pin, 6. second lead pin, 7. shell, 71. positioning groove, 72. convex rib. DETAILED DESCRIPTION

[0028] In the present utility model, the terms "first", "second", etc. are only used to distinguish similar objects, rather than to describe a specific order or sequence, and cannot be understood as indicating or implying relative importance. In the description, the directions or positional relationships indicated by "upper", "lower", "left", "right", "inner", "outer", "top / bottom", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model, rather than indicating or implying that the device referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0029] In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more. In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] See also Figure 1-Figure 7 As shown, a reed relay of the utility model comprises a base 1, a coil frame 3 and a reed switch 2. The coil frame 3 comprises a bobbin 31 wound with a coil 4 and two flanges 32. The two flanges 32 are respectively arranged at the two ends of the bobbin 31. The bobbin 3 is fixed on the base 1 in a horizontal position. The two ends of the base 1 corresponding to the coil 4 are respectively provided with first lead pins 5 electrically connected thereto. The reed switch 2 comprises a glass tube 21 and two tongue reed pieces installed in the glass tube 21 and capable of contacting or separating from each other. The glass tube 21 is passed through the bobbin 31. The two tongue reed lead ends 22 and 23 are respectively passed through the sintered parts at the two ends of the glass tube 21 and are respectively electrically connected to the second lead pins 6 correspondingly arranged on the base 1.

[0031] The utility model also includes a shell 7 with an opening on one side, a coil frame 3, a reed switch 2 and a base 1 are located in the shell 7, and the base 1 is close to or located at the opening of the shell 7, the base 1 and the shell 7 are clearance-matched, and the coil frame 3 is fixedly connected to the shell 7.

[0032] In this embodiment, a limiting structure is provided on the inner surface of the housing 7, and the limiting structure has at least one set of limiting surfaces, each set of limiting surfaces includes two limiting surfaces arranged opposite to each other in the length direction or width direction of the housing 7, and the two limiting surfaces are abutted against at least one flange portion 32 of the coil frame 3. Specifically, the two limiting surfaces are distributed along the length direction of the housing 7, the two flange portions 32 are located between the two limiting surfaces, and the two limiting surfaces are respectively abutted against the opposite outer side surfaces of the two flange portions 32 of the coil frame. In other embodiments, the two limiting surfaces are abutted against the two outer side surfaces opposite to each other of one flange portion of the coil frame.

[0033] In this embodiment, the limiting structure includes at least one positioning groove 71 provided on the inner surface of the housing 7, and the two opposite groove sides of the positioning groove 71 constitute the above-mentioned two limiting surfaces. Specifically, the limiting structure is provided on the inner surface of the housing 7. However, in other embodiments, the limiting structure may also be provided on the top surface of the housing 7, for example, the limiting structure includes two protrusions provided on the top wall of the housing 7 and extending downward, and the opposite inner sides of the two protrusions constitute the two limiting surfaces.

[0034] The limiting structure includes at least two groups of limiting surfaces, specifically two groups, but not limited thereto. The two groups of limiting surfaces are distributed along the width direction of the housing 7. Therefore, the number of the positioning grooves 71 is two.

[0035] As a preferred structure, the positioning groove 71 is formed by the interval between two convex ribs 72 arranged side by side on the inner surface of the shell 7. The two convex ribs 72 are specifically located on the inner side surface of the shell 7, and each convex rib 72 extends along the height direction of the shell 7, so that the shell 7 is easier to demold during injection molding. In other embodiments, the two convex ribs are located on the inner top surface of the shell. In other embodiments, the positioning groove is formed by a groove opened on the inner side surface of the shell.

[0036] Filling the outer shell 7 with glue can improve the insulation between the internal components and improve the overall anti-drop and anti-vibration performance, and the sealing glue is poured into the outer shell 7. A glue injection port 11 is provided on the base 1, and the glue injection port 11 is located in the middle of the base 1. The number of the glue injection ports 11 can be one or more, and when there are multiple glue injection ports 11, the multiple glue injection ports 11 are arranged along the length direction of the base 1. Specifically, in the present embodiment, the number of the glue injection ports 11 is two. When two glue injection ports 11 are provided, the size of the glue injection ports 11 is larger, so that the glue injection ports 11 can also play a role in exhaust while filling glue, and the connection between the two glue injection ports 11 can improve the strength of the base 1.

[0037] One or more exhaust notches 12 are provided at the edge of the base 1. Specifically, Figure 2As shown, the plurality of exhaust notches 12 are divided into two groups, and the exhaust notches 12 of each group are respectively located at both ends of the base 1 in the length direction, and each group includes two exhaust notches 12, and the two exhaust notches 12 are arranged along the width direction of the base 1. Each exhaust notch 12 is roughly semicircular in a top view. The arrangement of the exhaust notches 12 enables the utility model to achieve multiple exhausts and improve the exhaust effect during glue pouring.

[0038] The utility model provides a reed relay, wherein the housing 7 and the base 1 are clearance-matched, and the two flange portions 32 of the coil frame 3 are embedded and assembled on the housing 7, so that the utility model can not only indirectly fix the base 1 and the housing 7 relatively through the coil frame 3, but also avoid direct contact connection (such as snap connection, etc.) between the base 1 and the housing 7 to generate stress on the base 1, thereby avoiding increasing the risk of damaging the sealing of the reed switch 2.

[0039] The utility model provides a reed relay, and the unrelated parts are the same as the prior art or can be implemented by adopting the prior art.

[0040] The above embodiments are only used to further illustrate a reed relay of the utility model, but the utility model is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model fall within the protection scope of the technical solution of the utility model.

Claims

1. A reed relay, comprising a housing, a base, a coil frame and a reed switch, wherein the coil frame comprises a bobbin wound with a coil and two flanges, the two flanges being respectively arranged at the two ends of the bobbin; the coil frame is fixed on the base, and the reed switch is inserted into the coil frame; an opening is arranged on one side of the housing, the coil frame, the reed switch and the base are arranged in the housing, and the base is close to or located at the opening of the housing; the characteristics are: The coil frame is fixedly connected to the shell, and the base is clearance-matched with the shell.

2. The reed relay according to claim 1, characterized in that: The inner surface of the shell is provided with a limiting structure, which has at least one group of limiting surfaces, each group of limiting surfaces includes two limiting surfaces arranged opposite to each other in the length direction or width direction of the shell, and the two limiting surfaces are abutted against at least one flange portion of the coil frame.

3. The reed relay according to claim 2, characterized in that: The two limiting surfaces are distributed along the length direction of the shell, the two flange parts are located between the two limiting surfaces, and the two limiting surfaces are respectively abutted against the opposite outer side surfaces of the two flange parts of the coil frame.

4. The reed relay according to claim 3, characterized in that: The limiting structure includes at least two groups of limiting surfaces, and the at least two groups of limiting surfaces are distributed along the width direction of the shell.

5. The reed relay according to claim 2 or 3, characterized in that: The limiting structure comprises at least one positioning groove arranged on the inner surface of the shell, and two opposite groove side surfaces of the positioning groove constitute the two limiting surfaces.

6. The reed relay according to claim 5, characterized in that: The positioning groove is formed by the interval between two ribs arranged in parallel on the inner surface of the shell, or the positioning groove is formed by a groove opened on the inner side surface of the shell.

7. The reed relay according to claim 6, characterized in that: The two convex ribs are located on the inner side surface of the shell, and each convex rib extends along the height direction of the shell.

8. The reed relay according to claim 1, characterized in that: The shell is filled with glue, and the base is provided with a glue injection port; the glue injection port is located in the middle of the base; the two ends of the coil are electrically connected to the first lead pins correspondingly arranged on the base; the two tongue reed lead ends of the reed switch are electrically connected to the second lead pins correspondingly arranged on the base.

9. The reed relay according to claim 8, characterized in that: There are multiple glue injection ports, and the multiple glue injection ports are distributed at intervals along the length direction of the base.

10. The reed relay according to claim 7 or 8, characterized in that: One or more exhaust notches are arranged at the edge of the base; the multiple exhaust notches are divided into two groups, and the exhaust notches of each group are respectively located at two ends of the base in the axial direction of the coil frame.

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