Multipath reed switch relay

Abstract

The utility model provides a multipath reed pipe relay, which belongs to the technical field of relays and comprises a coil framework, a coil is wound outside the coil framework, at least two reed pipes are arranged in the coil framework, each reed pipe comprises a reed, and first circuit boards are arranged at the front end and the rear end of each reed pipe in the axial direction. A second circuit board is arranged between the two first circuit boards, communicated circuits are printed on the first circuit boards and the second circuit board, the reeds are connected to the first circuit boards, the coil comprises a power connection end, the power connection end is connected to the first circuit board or the second circuit board, and lead-out pins corresponding to the reeds and the power connection end in a one-to-one mode are arranged on the second circuit board; according to the multi-path reed switch, the circuit preset on the printed circuit board is used for replacing a traditional wiring mode, wiring in the relay can be omitted, miniaturization of the relay is facilitated, meanwhile, automatic production of products is facilitated, and the production efficiency and reliability of the products are improved.

Description

Technical Field

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

[0002] As a commonly used control component, relays can use smaller currents to control larger currents, use low voltages to control high voltages, use direct currents to control alternating currents, and can isolate control circuits from controlled circuits. They are widely used in automatic control, remote control, and protection circuits. Traditional electromagnetic relays are electrical relays that work by using the suction force generated by the input circuit between the electromagnet core and the armature. This type of relay is large in size, slow in action, and has limited reliability and life. As electronic appliances develop towards miniaturization and micro-miniaturization, new requirements are put forward for relays. By placing a reed switch in a coil, a reed switch relay can be obtained. As a new type of relay, reed relays can meet the needs of this development in many aspects.

[0003] The interior of the reed switch is composed of a pair of elastic magnetic reeds made of magnetic materials. The magnetic reeds are sealed in a glass tube filled with inert gas. The end faces of the magnetic reeds overlap, but a thin gap is left. The end contacts of the magnetic reeds are plated with a layer of precious metal rhodium or ruthenium to stabilize the switch performance and extend the service life. When there is no magnetic field, the two reeds in the glass tube are separated. When a magnetic substance approaches the glass tube, under the action of the magnetic field lines, the two reeds in the tube are magnetized and attract each other to contact, so that the circuit connected to the two pins is connected. After the external magnetic force disappears, the two reeds separate due to their own elasticity, and the circuit is disconnected.

[0004] In the prior art, when multiple reed switches are connected, each reed switch needs to be wired one by one, which not only increases the complexity of assembly, but also increases the overall size of the product. It is also easy to introduce additional failure points because each connecting line may have the risk of poor contact or breakage. In addition, a large number of wiring may affect the quality of signal transmission, resulting in unstable product performance, and is not conducive to the realization of automated processing of the product, and cannot guarantee the production efficiency and quality consistency of the product. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a multi-channel reed switch relay.

[0006] The technical solution adopted by the utility model is as follows: a multi-way reed switch relay, including a coil frame, a coil is wound around the coil frame, at least two reed switches are arranged inside the coil frame, the reed switch includes a reed, a first circuit board is arranged at the front and rear ends in the axial direction of the reed switch, a second circuit board is arranged between the two first circuit boards, the first circuit board and the second circuit board are printed with connecting lines, the reed is connected to the first circuit board, the coil includes an electrical connection end, the electrical connection end is connected to the first circuit board or the second circuit board, and the second circuit board is provided with lead pins corresponding to the reed and the electrical connection end one by one.

[0007] The plurality of reed switches are connected in parallel, in series or in mixed connection through the first circuit board.

[0008] The coil frame is provided with accommodating cavities for installing reed switches along the axial direction, the number of the accommodating cavities is not less than the number of reed switches, and an isolation cavity is provided between adjacent accommodating cavities.

[0009] The accommodating cavity is provided with a positioning cavity in the axial direction of the coil frame, the reed switch comprises a tube body, the outer wall of the tube body is provided with a positioning protrusion extending along the action direction of the reed leaf, and the positioning protrusion extends into the positioning cavity to form a positioning.

[0010] The accommodating cavities are evenly distributed along the circumferential direction and are connected through the positioning cavities, and the inner walls of adjacent positioning cavities are smoothly transitioned.

[0011] The spring is a normally open terminal, a normally closed terminal and a common terminal, the normally open terminal and the common terminal are connected to the first circuit board on the same side, and the normally closed terminal is connected to the first circuit board on the other side, or the normally closed terminal and the common terminal are connected to the first circuit board on the same side, and the normally open terminal is connected to the first circuit board on the other side.

[0012] It also includes a base and an upper shell, the second circuit board is installed on the base, and a plurality of lead pins extend from the same side of the base.

[0013] A fixing plate is provided on the base, and the fixing plate is located between the coil frame and the first circuit board. A slot is provided on the side of the fixing plate facing the coil frame along the height direction of the upper shell. A through hole is provided on the fixing plate for the reed switch to pass through. The coil frame includes a positioning plate portion inserted in the slot, and positioning blocks are provided on both sides of the inner wall of the upper shell facing the fixing plate.

[0014] The two first circuit boards are arranged in parallel, and the second circuit board is arranged perpendicular to the first circuit board and is located below the coil.

[0015] The first circuit board and the second circuit board are assembled in an integrated manner or in separate parts.

[0016] The beneficial effects of the utility model are as follows: the multi-way reed switch in the utility model uses preset circuits on the printed circuit board instead of the traditional wiring method, which can save the wiring inside the relay, thereby facilitating the miniaturization of the relay, and at the same time facilitating the automated production of the product, thereby improving the production efficiency and reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0018] Figure 1 It is a schematic diagram of the utility model;

[0019] Figure 2 It is a partial explosion schematic diagram of the utility model;

[0020] Figure 3 The utility model is a cross-sectional view Figure 1 ;

[0021] Figure 4 It is a schematic diagram of the reed switch, coil frame and coil in the utility model;

[0022] Figure 5 It is an exploded schematic diagram of part of the structure of the utility model;

[0023] Figure 6 The utility model is a cross-sectional view Figure 2 . DETAILED DESCRIPTION

[0024] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0025] In the description of the present application, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified, "plurality" means two or more.

[0026] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] In the description of this application, it should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for the purpose of distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0028] Embodiment 1:

[0029] like Figures 1 to 6As shown, a multi-way reed switch relay includes a coil skeleton 1, a coil 2 is wound around the coil skeleton 1, at least two reed switches 3 are arranged inside the coil skeleton 1, the reed switch 3 includes a reed 31, the structure of the reed switch 3 is well known to those skilled in the art and is not described in detail herein, a first circuit board 4 is arranged at the front and rear ends in the axial direction of the reed switch 3, a second circuit board 5 is arranged between the two first circuit boards 4, a connecting line is printed on the first circuit board 4 and the second circuit board 5, the reed 31 is connected to the first circuit board 4, the coil 2 includes a power connection terminal 21, the coil 2 is powered by an external power supply through the power connection terminal 21, and the power connection terminal 21 is connected To the first circuit board 4 or the second circuit board 5, the coil 2 generates a magnetic field so that the reed switches 3 act synchronously, and the second circuit board 5 is provided with lead pins 6 corresponding to the reed pieces 31 and the power terminals 21. According to the actual wiring method between the multiple reed switches 3, the corresponding circuits are printed on the first circuit board 4 and the second circuit board 5, wherein the first circuit board 4 reserves holes that are compatible with the reed pieces 31 to facilitate unified welding. By using the preset circuits on the printed circuit board instead of the traditional wiring method, the wiring inside the relay can be omitted, which is beneficial to the miniaturization of the relay, and at the same time facilitates the realization of automated production of the product, thereby improving the production efficiency and reliability of the product.

[0030] Furthermore, multiple reed switches 3 are connected in parallel, in series or in a mixed connection through the first circuit board 4. In the present embodiment, four reed switches 3 are connected in parallel, which can improve the load capacity and reliability of the reed switch relay. If connected in series, the resistance values ​​of the multiple reed switches connected in series can be added up to increase the total resistance value, thereby increasing the withstand voltage value of the reed relay. If mixed connection is adopted, for example, two reed switches 3 are first connected in series to form a reed switch assembly, and then the two reed switch assemblies are connected in parallel, which can also improve the withstand voltage value and reliability of the reed relay.

[0031] The coil skeleton 1 is axially penetrated with a receiving cavity 100 for installing the reed switch 3. The number of the receiving cavities 100 is not less than the number of the reed switches 3, ensuring that each reed switch can be accurately placed at a predetermined position, reducing the possibility of assembly errors and speeding up the assembly speed. An isolation cavity 101 is provided between adjacent receiving cavities 100 to play a role of physical isolation, reduce or avoid electromagnetic interference between the reed switches, thereby improving the overall performance and stability of the relay, and enhancing the overall structural strength of the coil skeleton. In the present embodiment, the isolation cavity 101 forms an isolation in the circumferential direction relative to the receiving cavity 100.

[0032] The accommodating cavity 100 is provided with a positioning cavity 102 in the axial direction of the coil skeleton 1, and the reed switch 3 includes a tube body 32. The outer wall of the tube body 32 is provided with a positioning protrusion 33 extending along the movement direction of the reed 31. The positioning protrusion 33 extends into the positioning cavity 102 to form a positioning, thereby improving the stability of the reed switch 3 in the coil skeleton 1. At the same time, the movement direction of the reed 31 can be directly observed through the positioning protrusion 33, so that the reed switch 3 is correctly installed in the accommodating cavity 100, ensuring that the placement of the reed in the magnetic field is optimized, which helps to reduce the loss of magnetic lines of force and ensure that the effect of the magnetic field on the reed is maximized, thereby improving the overall performance of the relay.

[0033] The accommodating cavities 100 are evenly distributed along the circumference, and the reed switches are placed at equally spaced positions on the coil frame 1, which helps to form a uniform magnetic field distribution inside the relay and improve the response consistency of the reed switches. The accommodating cavities 100 are connected through the positioning cavity 102, which can promote air circulation and is beneficial to heat dissipation. The inner walls of adjacent positioning cavities 102 have a smooth transition, which reduces the friction between the reed switch 3 and the frame 1 and extends the service life of the reed switch.

[0034] In this embodiment, the spring 31 is a normally open terminal, a normally closed terminal and a common terminal, the normally open terminal and the common terminal are connected to the first circuit board 4 on the same side, and the normally closed terminal is connected to the first circuit board 4 on the other side, or the normally closed terminal and the common terminal are connected to the first circuit board 4 on the same side, and the normally open terminal is connected to the first circuit board 4 on the other side.

[0035] It also includes a base 7 and an upper shell 8. The second circuit board 5 is installed on the base 7. A plurality of lead pins 6 extend from the same side of the base 7, which can simplify the layout of the circuits and reduce the risk of wiring errors.

[0036] A fixing plate 9 is provided on the base 7, and the fixing plate 9 is located between the coil skeleton 1 and the first circuit board 4. A slot 91 is provided on the fixing plate 9 along the height direction of the upper shell 8 on the side facing the coil skeleton 1, which helps to quickly and accurately position the coil skeleton 1 during the assembly process and simplifies the assembly process. A through hole 92 is provided on the fixing plate 9 for the reed switch 3 to pass through, making the installation and positioning of the reed switch more direct and simple. The coil skeleton 1 includes a positioning plate portion 103 inserted in the slot 91, and positioning blocks 81 are provided on the inner wall of the upper shell 8 on both sides facing the fixing plate 9. When the base 7 and the upper shell 8 are matched, the fixing plate 9 and the internal components are further fixed.

[0037] In this embodiment, the coil skeleton 1 includes a central axis portion and isolation plate portions located on both sides of the central axis portion. The coil is wound around the central axis portion and is located between the two isolation plate portions. The outer diameter of the isolation plate portion is larger than the outer diameter of the coil, which can play a certain shielding role, reduce the impact of the electromagnetic interference generated by the coil on the circuit board, and improve the electromagnetic compatibility of the relay.

[0038] The two first circuit boards 4 are arranged in parallel, and the second circuit board 5 is arranged perpendicular to the first circuit board 4 and is located below the coil 2. The vertical arrangement design can effectively utilize the space, making the entire relay more compact. At the same time, the three circuit boards are located in three directions, which is convenient for automated assembly.

[0039] Furthermore, the first circuit board 4 and the second circuit board 5 are integrally or separately assembled. In this embodiment, the two first circuit boards 4 and the second circuit boards 5 are separately assembled, which reduces the difficulty of processing the circuit boards.

[0040] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A multi-way reed switch relay, characterized in that: The invention comprises a coil frame (1), a coil (2) is wound around the coil frame (1), at least two reed switches (3) are arranged inside the coil frame, the reed switches (3) comprise a reed leaf (31), first circuit boards (4) are arranged at the front and rear ends of the reed switches (3) in the axial direction, a second circuit board (5) is arranged between the two first circuit boards (4), a connecting line is printed on the first circuit board (4) and the second circuit board (5), the reed leaf (31) is connected to the first circuit board (4), the coil (2) comprises an electrical connection terminal (21), the electrical connection terminal (21) is connected to the first circuit board (4) or the second circuit board (5), and the second circuit board (5) is provided with lead pins (6) corresponding to the reed leaf (31) and the electrical connection terminal (21) one by one.

2. A multi-way reed switch relay according to claim 1, characterized in that: The plurality of reed switches (3) are connected in parallel, in series or in mixed connection via a first circuit board (4).

3. A multi-way reed switch relay according to claim 1, characterized in that: The coil skeleton (1) is provided with a receiving cavity (100) for installing a reed switch (3) along the axial direction, the number of the receiving cavities (100) is not less than the number of the reed switches (3), and an isolation cavity (101) is provided between adjacent receiving cavities (100).

4. A multi-way reed switch relay according to claim 3, characterized in that: The accommodating cavity (100) is provided with a positioning cavity (102) in the axial direction of the coil frame (1); the reed switch (3) comprises a tube body (32); a positioning protrusion (33) is extended on the outer wall of the tube body (32) along the movement direction of the reed leaf (31); the positioning protrusion (33) extends into the positioning cavity (102) to form a positioning.

5. A multi-way reed switch relay according to claim 3, characterized in that: The accommodating cavities (100) are evenly distributed along the circumferential direction and are connected via the positioning cavities (102), and the inner walls of adjacent positioning cavities (102) are smoothly transitioned.

6. A multi-way reed switch relay according to claim 1, characterized in that: The spring sheet (31) is a normally open terminal, a normally closed terminal and a common terminal, the normally open terminal and the common terminal are connected to the first circuit board (4) on the same side, and the normally closed terminal is connected to the first circuit board (4) on the other side, or the normally closed terminal and the common terminal are connected to the first circuit board (4) on the same side, and the normally open terminal is connected to the first circuit board (4) on the other side.

7. A multi-way reed switch relay according to claim 1, characterized in that: It also includes a base (7) and an upper shell (8), the second circuit board (5) is mounted on the base (7), and a plurality of lead pins (6) extend from the same side of the base (7).

8. A multi-way reed switch relay according to claim 7, characterized in that: A fixing plate (9) is arranged on the base (7), and the fixing plate (9) is located between the coil frame (1) and the first circuit board (4). A slot (91) is arranged on the side of the fixing plate (9) facing the coil frame (1) along the height direction of the upper shell (8). A through hole (92) for the reed switch (3) to pass through is arranged on the fixing plate (9). The coil frame (1) includes a positioning plate portion (103) plugged into the slot (91), and positioning blocks (81) are arranged on both sides of the inner wall of the upper shell (8) facing the fixing plate (9).

9. A multi-way reed switch relay according to claim 7, characterized in that: The two first circuit boards (4) are arranged in parallel, and the second circuit board (5) is arranged perpendicular to the first circuit board (4) and is located below the coil (2).

10. A multi-way reed switch relay according to claim 1 or 9, characterized in that: The first circuit board (4) and the second circuit board (5) are integrally or separately assembled.

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