Dry reed relay with positioning structure

Abstract

The utility model discloses a dry reed relay with a positioning structure, which comprises a coil rack and at least one leading-out pin, and the coil rack and the leading-out pin are limited through the positioning structure, so that the coil rack is matched and positioned with the leading-out pin in front, back, up and down directions. The coil rack and the lead-out pin are locked through the positioning structure, the front and back movement of the coil rack and the movement of the coil rack towards the direction of the lead-out pin, relative displacement between the coil rack and the reed switch is effectively prevented, the reed switch is prevented from being pressed, and the sealing performance of the reed switch is ensured.

Description

Technical Field

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

[0002] Reed relays are derivatives of reed switch technology. Because reed switches use a special packaging structure (sealed sintered glass tube) and process (filling the glass tube with inert gas or vacuum treatment), the reed part can be free from pollution and corrosion from the external atmospheric environment, so it has unparalleled high contact reliability and excellent insulation performance. Reed relays have been widely recognized and applied in the fields that pursue high insulation and high contact reliability (represented by instrument testing, network communication, new energy insulation testing and medical electronics).

[0003] Existing reed relays usually include a reed switch, a coil frame, a coil, lead pins and a housing. The reed switch is the core component of the reed relay, so the difficulty in manufacturing the reed relay lies in how to ensure the initial sealing of the reed switch to the greatest extent. In the reed relay structure, since the lead pins must form an electrical connection with the lead end of the reed switch tongue, during the assembly process of various components, the lead pins will transfer stress to the sintered section of the glass tube of the reed switch through the lead end of the reed. The sintered section of the glass tube of the reed switch is easy to break due to the brittle glass material, which in turn causes the glass tube to lose its sealing and be damaged, which increases the risk of damage to the sealing of the reed switch. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a reed relay with a positioning structure to reduce the risk of damage to the sealing of the reed switch.

[0005] In order to achieve the above object, the utility model is realized by the following technical solutions:

[0006] A reed relay with a positioning structure comprises a coil frame and at least one lead pin. The coil frame and the lead pin are limited by the positioning structure so that the coil frame is positioned in coordination with the lead pin in both the front and rear and up and down directions.

[0007] Furthermore, the positioning structure includes two positioning grooves located at the same end in the length direction of the coil frame, and also includes two positioning parts arranged one after the other on the lead-out pin, the two positioning grooves are formed by sinking the lower surface of the coil frame and are arranged one after the other, the two positioning grooves are arranged one after the other and pass through the lower surface of the coil frame, the two positioning grooves correspond to the two positioning parts one by one, the groove tops of the positioning grooves are placed on the upper surfaces of the corresponding positioning parts, and the coil frame is confined between the two positioning parts.

[0008] Furthermore, it also includes a reed switch, which is arranged in the inner hole of the coil frame, and the two reed lead ends of the reed switch extend from the two end surfaces of the coil frame respectively, and each lead pin is recessed at the corresponding position of the reed lead end to form a connecting groove, and the connecting groove matches the reed lead end, and the reed lead end and the positioning groove are located on the same side of the lead pin in the up and down directions.

[0009] Furthermore, the two surfaces in the length direction of the coil frame are defined as the two end surfaces of the coil frame, and the two surfaces in the width direction of the coil frame are defined as the two side surfaces of the coil frame. The side surfaces of the positioning portion include a first limiting surface and a second limiting surface. The first limiting surface is parallel to the end surface of the coil frame, and the second limiting surface is parallel to the side surface of the coil frame. The groove wall of the positioning groove includes a first groove wall and a second groove wall. The first groove wall, the second groove wall and the groove top are connected to each other, the first limiting surface is in contact with the first groove wall, and the second limiting surface is in contact with the second groove wall.

[0010] Furthermore, the positioning grooves are located at the junction of the end surface and the side surface of the coil frame, and each positioning groove runs through a side surface and an end surface of the coil frame.

[0011] Furthermore, the lower section of the groove wall of the positioning groove is chamfered.

[0012] Furthermore, two positioning grooves are provided at each end of the coil frame in the length direction, two lead-out pins are provided, each lead-out pin is provided with two positioning parts, and the four positioning parts are respectively matched with the four positioning grooves.

[0013] Furthermore, the groove tops of all the positioning grooves are located in the same horizontal plane, the lead pins are used as the positioning reference, the top surfaces of the positioning parts of all the lead pins are used as the reference plane, and the top surfaces of all the positioning parts are located in the same horizontal plane.

[0014] Furthermore, the lead-out pin includes a connecting portion and a pin, the connecting portion is opposite to the end face of the coil frame and extends two positioning portions on a side close to the coil frame, the pin is connected to one of the positioning portions, the connecting portion forms a clearance groove between the two positioning portions, and the middle part of the end of the coil frame extends into the clearance groove.

[0015] The utility model has the following beneficial effects:

[0016] The coil frame and the lead pins are positioned to limit the movement of the coil frame in the front, back, up and down directions, effectively preventing relative displacement between the coil frame and the reed switch, reducing the risk of squeezing and pressing the reed switch due to displacement of the coil frame during the manufacturing process, and thus reducing the risk of damage to the sealing of the reed switch.

[0017] Two positioning grooves are formed by sinking the lower surface of the coil frame. The setting of the positioning grooves does not affect the length of the coil frame. Within the limited space in the length direction, it ensures the positioning accuracy while effectively increasing the overall length of the coil frame, ensuring that the glass tube of the core component, the reed switch, is hidden inside the coil frame, effectively reducing the possibility of the reed switch being affected by external forces during the subsequent assembly and injection molding of the product, and ensuring the sealing of the reed switch.

[0018] Two positioning grooves are set at each end of the coil frame in the length direction, which cooperate with the positioning parts on the two lead-out pins. The front, back, left, right and direction of the coil frame towards the pins are locked, keeping the coil frame accurately positioned on the lead-out pins, ensuring the accurate relative position of each component, thereby improving the overall magnetic circuit magnetic efficiency under the premise of the same coil power consumption, increasing the reed closing driving force, and shortening the relay action time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a reed relay according to an embodiment of the utility model;

[0020] Figure 2 yes Figure 1 A cross-sectional view of a reed relay without the plastic housing.

[0021] Figure 3 yes Figure 1 Exploded view of a reed relay;

[0022] Figure 4 It is a schematic diagram of a coil frame of an embodiment of the utility model;

[0023] Figure 5 yes Figure 4 Another angle view of the coil former;

[0024] Figure 6 It is a schematic diagram of the lead-out pins of an embodiment of the utility model;

[0025] Figure 7 It is a schematic diagram of the assembly of the lead-out pin and the coil frame of the embodiment of the utility model;

[0026] Figure 8 yes Figure 7 Another angle view of

[0027] Fig. 9 It is a partial enlarged view of the lead-out pins of the embodiment of the utility model.

[0028] Explanation of reference numerals: 1. Plastic package shell; 2. Coil frame; 3. Reed switch; 4. Diode; 5. Lead pin; 6. Slot top; 7. Give way groove; 8. Connecting groove; 9. Reed lead end; 10. Positioning groove; 11. Positioning part; 12. First slot wall; 13. Second slot wall; 14. First limiting surface; 15. Second limiting surface; 16. Chamfer; 71. Connecting part; 72. Pin. DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0031] like Figure 1 to Figure 2 As shown, the reed relay includes a plastic-encapsulated housing 1 and a movement located in the plastic-encapsulated housing 1 . The movement includes a coil frame 2 , a reed switch 3 , a diode 4 and lead pins 5 . The reed switch 3 is placed in the inner hole of the coil frame 2 .

[0032] See also Figures 1 to 9 This embodiment discloses a reed relay with a positioning structure, including a coil frame 2 and at least one lead pin 5. The coil frame 2 and the lead pin are limited by the positioning structure so that the coil frame 2 can be moved in the front and back and up and down directions (for directions, please refer to Figure 4 ) are positioned in coordination with the lead pin 5 to prevent the coil frame 2 from moving relative to the lead pin 5, thereby preventing the coil frame 2 and the reed switch from being displaced relative to each other, thereby reducing the possibility of extrusion caused by displacement during the manufacturing process and causing failure of the reed switch seal.

[0033] The positioning structure includes two positioning grooves 10 located at the same end of the length direction (that is, the left-right direction) of the coil frame 2. The two positioning grooves 10 are formed by sinking the lower surface of the coil frame 2 and are arranged one after the other. It also includes two positioning parts 11 arranged one after the other on the lead-out pin 5. The two positioning grooves 10 correspond to the two positioning parts 11 one by one. The groove top 6 of the positioning groove 10 is placed on the upper surface of the corresponding positioning part 11 to achieve the limitation of the coil frame 2 in the up and down direction, that is to say, the coil frame is positioned with the lead-out pin as a reference and the top surface of the two positioning parts as a reference. When the coil frame moves toward the lead-out pin, the lead-out pin moves synchronously with the coil frame. The coil frame 2 is limited between the two positioning parts 11 one after the other to achieve the positioning of the coil frame 2 in the front and back direction. The coil frame 2 is matched with the lead pin 5. Specifically, the coil frame 2 is placed on the lead pin 5. The coil frame 2 is matched with the positioning part 11 on the lead pin 5 through the positioning groove 10, so that the movement of the coil frame 2 in the front and back directions and in the direction toward the pin is locked, so that the lead pin 5 and the coil frame 2 are accurately positioned.

[0034] A reed switch 3 is provided in the inner hole of the coil frame 2. Two reed lead ends 9 of the reed switch 3 extend from two end faces (end faces in the length direction) of the coil frame 2 respectively. Each lead pin 5 is recessed at the position corresponding to the reed lead end 9 to form a connecting groove 8. The connecting groove 8 matches the reed lead end 9. The reed lead end 9 and the positioning groove 10 are located on the same side of the lead pin 5. By providing the connecting groove 8, the reed lead end 9 of the reed switch 3 is prevented from being subjected to stress before welding, and the welding area between the lead end 5 and the reed lead end 9 is increased. The reed lead end 9 and the positioning groove 10 are located on the same side of the lead pin 5. When the coil frame 2 moves, the lead pin 5 is driven to move synchronously in the same direction (for example, forward and backward or downward). The positions of the coil frame 2 and the lead pin 5 relative to the reed lead end 9 remain unchanged, thereby avoiding squeezing the reed switch 3.

[0035] As shown in the figure, the positioning groove 10 is concave relative to the end surface of the coil frame 2, so the length of the coil frame 2 will not be reduced due to the provision of the positioning groove 10, that is, the coil frame 2 can ensure the maximum length, so as to hide the reed switch 3 in the inner hole of the coil frame 2 as much as possible, thereby preventing the reed switch 3 from being subjected to stress impact, thereby forming a good protection for the reed switch 3.

[0036] Define the length direction of coil frame 2 ( Figure 4 The two faces in the left and right directions are the two end faces of the coil frame 2, and the width direction of the coil frame 2 ( Figure 4 The two surfaces (in the front-to-back direction) are the two side surfaces of the coil frame 2, such as Fig. 9The side surface of the positioning portion 11 includes a first limiting surface 14 and a second limiting surface 15. The first limiting surface 14 is parallel to the end surface of the coil frame 2, and the second limiting surface 15 is parallel to the side surface of the coil frame 2. The groove wall of the positioning groove 10 includes a first groove wall 12 and a second groove wall 13. The first groove wall 12, the second groove wall 13 and the groove top are connected in pairs. The first limiting surface 14 abuts against the first groove wall 12, and the second limiting surface 15 abuts against the second groove wall 13. In this way, the two end surfaces and two side surfaces of the coil frame 2 are abutted by the positioning portion 11, and the coil frame 2 cannot move forward and backward or left and right, which effectively prevents the coil frame 2 from shifting and pressing the reed switch 3, and ensures the sealing of the reed switch 3.

[0037] In this embodiment, the positioning groove 10 is located at the junction of the end face and the side face of the coil frame 2, and each positioning groove 10 passes through one side face and one end face of the coil frame 2. The positioning groove 10 is arranged at the junction of the end face and the side face of the coil frame 2, so that the positioning groove 10 avoids the position of the inner hole of the coil frame 2, so that the length of the inner hole of the coil frame 2 is not the same as the length of the coil frame 2, and the inner hole obtains the maximum length to accommodate the reed switch 3 as much as possible, thereby avoiding damage to the reed switch 3.

[0038] As a preferred solution, in this embodiment, if Figure 4 and Figure 5 The chamfer 16 of the lower section of the groove wall of the positioning groove 10 is used to serve as a demoulding slope to facilitate demoulding, and also serves as an assembly positioning guide. The coil frame 2 and the lead-out pin 5 can be guided by the chamfer 16 when assembled. The chamfer 16 cooperates with the positioning structure to obtain a smaller tolerance and improve the positioning accuracy.

[0039] Two positioning grooves 10 are arranged at each end of the coil frame 2 in the length direction, and two lead pins 5 are arranged, each lead pin 5 is provided with two positioning parts 11, and the four positioning parts 11 are respectively matched with the four positioning grooves 10, that is to say, the displacement of the coil frame 2 in the length direction (that is, the left and right direction) is limited by the two lead pins 5. Therefore, the front, back, left, right and left positions of the coil frame 2 as well as the orientation toward the pins are locked, so as to keep the coil frame 2 accurately positioned on the lead pins 5, and ensure the accurate relative position between each component, so as to improve the overall magnetic circuit magnetic efficiency under the premise of the same coil power consumption, increase the spring closing driving force, and shorten the relay action time.

[0040] The lower surface of the coil frame 2 is partially inwardly contracted to form a positioning groove 10. The setting of the positioning groove 10 does not affect the length of the coil frame. While ensuring the positioning accuracy within the limited space in the length direction, the overall length of the coil frame 2 is effectively increased, ensuring that the glass tube of the core component reed switch 3 is hidden inside the coil frame 2, effectively reducing the possibility of the reed switch being affected by external forces during the subsequent assembly and injection molding of the product, and ensuring the sealing of the reed switch 3.

[0041] The coil frame 2 and the lead pin 5 are positioned in surface contact. Preferably, the groove tops 6 of all the positioning grooves 10 are located in the same horizontal plane, the lead pin is used as the positioning reference, the top surface of the positioning part of all the lead pins is the reference plane, and the top surfaces of all the positioning parts 11 are located in the same horizontal plane. The positioning accuracy is higher, which effectively prevents the coil frame 2 from shifting and compressing the reed switch 3, thereby ensuring the sealing of the reed switch 3.

[0042] The lead pin 5 includes a connection portion 71 and a pin 72. The connection portion 71 is opposite to the end surface of the coil frame 2 and extends two positioning portions 11 on the side close to the coil frame 2. The pin 72 is connected to one of the positioning portions 11. A clearance groove 7 is formed between the two positioning portions 11 on the connection portion 71. The middle part of the end of the coil frame 2 extends into the clearance groove 7, thereby ensuring that the length of the coil frame 2 is not affected by the positioning structure and obtaining the maximum inner hole length to protect the reed switch 3.

[0043] As described above, the embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. These modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model. Therefore, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the protection scope of the utility model.

Claims

1. A reed relay with a positioning structure, characterized in that: The invention comprises a coil frame and at least one lead-out pin. The coil frame and the lead-out pin are limited by a positioning structure. The positioning structure comprises a positioning groove located on the coil frame and a positioning part on the lead-out pin. The positioning groove and the positioning part cooperate with each other so that the coil frame is positioned in coordination with the lead-out pin in the front, back, top and bottom directions.

2. The reed relay with a positioning structure according to claim 1, characterized in that: The positioning structure includes two positioning grooves located at the same end of the length direction of the coil frame, the two positioning grooves are formed by sinking the lower surface of the coil frame and are arranged one after the other, and also include two positioning parts arranged one after the other on the lead-out pin, the two positioning grooves correspond to the two positioning parts one by one, the groove tops of the positioning grooves are placed on the upper surfaces of the corresponding positioning parts, and the coil frame is confined between the two positioning parts.

3. The reed relay with a positioning structure according to claim 2, characterized in that: It also includes a reed switch, which is arranged in the inner hole of the coil frame. The two reed lead ends of the reed switch extend from the two end surfaces of the coil frame respectively. Each lead pin is recessed at the corresponding position of the reed lead end to form a connecting groove. The connecting groove matches the reed lead end. The reed lead end and the positioning groove are located on the same side of the lead pin in the up and down directions.

4. The reed relay with a positioning structure according to claim 2, characterized in that: The two surfaces in the length direction of the coil frame are defined as the two end surfaces of the coil frame, and the two surfaces in the width direction of the coil frame are defined as the two side surfaces of the coil frame. The side surfaces of the positioning portion include a first limiting surface and a second limiting surface. The first limiting surface is parallel to the end surface of the coil frame, and the second limiting surface is parallel to the side surface of the coil frame. The groove wall of the positioning groove includes a first groove wall and a second groove wall. The first groove wall, the second groove wall and the groove top are connected in pairs, the first limiting surface is abutted against the first groove wall, and the second limiting surface is abutted against the second groove wall.

5. The reed relay with a positioning structure according to claim 4, characterized in that: The positioning grooves are located at the junction of the end surface and the side surface of the coil frame, and each positioning groove runs through a side surface and an end surface of the coil frame.

6. The reed relay with a positioning structure according to claim 4, characterized in that: The lower section of the groove wall of the positioning groove is chamfered.

7. The reed relay with a positioning structure according to any one of claims 1 or 5, characterized in that: Two positioning grooves are provided at each end of the coil frame in the length direction, two lead-out pins are provided, each lead-out pin is provided with two positioning parts, and the four positioning parts are respectively matched with the four positioning grooves.

8. The reed relay with a positioning structure according to claim 7, characterized in that: The groove tops of all positioning grooves are located in the same horizontal plane, the lead pins are used as the positioning reference, the top surfaces of the positioning parts of all the lead pins are used as the reference plane, and the top surfaces of all the positioning parts are located in the same horizontal plane.

9. The reed relay with a positioning structure according to claim 1, characterized in that: The lead pin includes a connecting portion and a pin, the connecting portion is opposite to the end face of the coil frame and extends two positioning portions on a side close to the coil frame, the pin is connected to one of the positioning portions, the connecting portion forms a clearance groove between the two positioning portions, and the middle part of the end of the coil frame extends into the clearance groove.

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