Switch assembly and safety device

Abstract

Provided in the present disclosure are a switch assembly and a safety device. The switch assembly comprises a relay and a switch unit, which are connected in parallel, wherein the switch unit and the relay are configured such that, in a normal operating state, the relay is closed and the switch unit is open. The relay comprises a relay body and a shielding cover covering the outside of the relay body, wherein the relay body comprises a fixed part and a moving part, the moving part moving relative to the fixed part and having at least a movement component in a Z-axis direction. The switch unit is placed close to the relay, comprises at least one reed switch and is adapted to close when an external magnetic field passes through a first region around the switch unit. The relay is adapted to open when the external magnetic field passes through a second region around the relay, the first region at least partially overlapping with the second region to keep the switch assembly closed. The safety device comprises the above safety assembly. The present application can remain closed even when subjected to interference from the external magnetic field, and is thus safer and more reliable during use.

Description

Switching components and safety devices

[0001] This disclosure claims priority to Chinese patent application No. 202411949518.X, filed on December 27, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to the field of switch technology, and more specifically to a switch assembly and a safety device. Background Technology

[0003] Traditional relays, based on electromagnetic effects, control the energization and de-energization of a control coil, thereby controlling the action of contacts and achieving circuit control. A relay mainly consists of a coil, iron core, stationary reed, stationary contact, armature assembly, and moving reed, moving contact, and housing that are linked to the armature assembly. When voltage or current is applied across the coil, the coil generates a magnetic field. The electromagnetic force overcomes the reed's reaction force, attracting the armature and causing it to move. The armature then moves the moving contact to contact or separate from the stationary contact, thus achieving the switching function. In a strong magnetic field environment, the external magnetic field interacts with the relay's internal magnetic field, affecting the electromagnet's attraction to the armature and causing abnormal contact action. This is especially problematic when the relay is used in access control systems as a control switch for security doors; malfunctioning relays can pose safety hazards. Summary of the Invention

[0004] The purpose of this invention is to overcome the aforementioned defects or problems in the prior art and to provide a switching component and safety device that can remain closed even when disturbed by an external magnetic field, making it safer and more reliable in application.

[0005] To achieve the above objectives, the present invention and its preferred embodiments employ the following technical solutions, but the embodiments are not limited to the following solutions:

[0006] Technical Solution 1 and its related embodiments design a switching assembly, including a relay and a switching unit connected in parallel. The switching unit and the relay are configured such that, under normal operating conditions, the relay is closed and the switching unit is open. The relay includes a relay body and a shield covering the relay body. The relay body includes a fixed part and a moving part. The moving part moves relative to the fixed part and has at least a motion component in the Z-axis direction. The switching unit is placed close to the relay and includes at least one reed switch. The switching unit is adapted to close when an external magnetic field passes through a first region around it. The relay is adapted to open when an external magnetic field passes through a second region around it. The first region and the second region at least partially overlap to keep the switching assembly closed.

[0007] Based on technical solution one, technical solution two is also provided. In technical solution two and its related embodiments, each reed switch is adapted to close when an external magnetic field passes through a third region around it and remain open when an external magnetic field passes through a fourth region around it. The third and fourth regions are arranged circumferentially along the reed switch. When the number of reed switches is at least two, the reed switches are connected in parallel and intersected with each other so that the fourth region of one of the two intersecting reed switches at least partially overlaps with the third region of the other reed switch.

[0008] Based on technical solution two, there is also technical solution three. In technical solution three and its related embodiments, the number of reed switches is at least two, and at least two reed switches in each reed switch intersect each other perpendicularly.

[0009] Based on technical solution three, there is also technical solution four. In technical solution four and its related embodiments, the switching unit is located on one side of the relay along the X-axis or Y-axis; the number of reed switches is only two, and the cross axis of the two reed switches is perpendicular to the Z-axis.

[0010] Based on technical solution four, there is also technical solution five. In technical solution five and its related embodiments, the length direction of the relay is the X-axis direction, the moving part includes an armature, and the width direction of the armature is the Y-axis direction; the switching unit is located on one side of the relay along the Y-axis direction; the cross axis is parallel to the Y-axis direction and located in the middle of the relay.

[0011] Based on technical solution five, there is also technical solution six. In technical solution six and its related embodiments, both reed switches are tilted relative to the Z-axis direction.

[0012] Based on technical solution three, there is also technical solution seven. In technical solution seven and its related embodiments, the number of reed switches is three, and the three reed switches intersect each other perpendicularly.

[0013] Based on technical solution seven, there is also technical solution eight. In technical solution eight and its related embodiments, the switching unit is located on one side of the relay along the X-axis or Y-axis direction, one of the reeds extends perpendicularly to the Z-axis direction, and the cross axis of the remaining two perpendicularly intersecting reeds is parallel to the reed, and the remaining two reeds are both inclined relative to the Z-axis direction.

[0014] Based on any one of technical solutions four to six, there is also a technical solution nine. In technical solution nine and its related embodiments, there is also an electronic control board, and the relay and switch unit are electrically connected to the electronic control board; each reed switch has pin terminals at both ends, and each pin terminal is plugged into the electronic control board so that the two reed switches are connected in parallel.

[0015] Based on technical solution seven or eight, there is also technical solution ten. In technical solution ten and its related embodiments, there is also an electronic control board. The relay and the switch unit are both electrically connected to the electronic control board. Each reed switch has pin terminals at both ends. Each pin terminal is plugged into the electronic control board so that the three reed switches and the use end contact pins of the relay are connected in parallel. One of the reed switches is attached to the electronic control board.

[0016] Based on technical solution one, there is also technical solution eleven. In technical solution eleven and its related embodiments, the reed switch is configured to extend along the Z-axis direction when its quantity is one.

[0017] Technical solution 12 and its related embodiments provide a safety device for controlling access control of a security door. The safety device adopts the switch assembly described in technical solution 9. The switch assembly is used to be installed on a fixed first wall, and the first wall is perpendicular to the Z-axis direction.

[0018] The safety device provided by technical solution thirteen and its related embodiments adopts the switching assembly described in technical solution nine and also includes a housing, which covers the relay and switching unit of the switching assembly.

[0019] Technical solution fourteen and its related embodiments provide a safety device for controlling access control of a security door, wherein the safety device adopts the switch assembly described in technical solution ten.

[0020] The safety device provided by technical solution 15 and its related embodiments further includes a housing, which covers the relay and switch unit of the switching assembly.

[0021] As can be seen from the above description of the present invention and its preferred embodiments, 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:

[0022] In technical solution one and its preferred embodiments, "normal working state" means "no external magnetic field passes through or the magnetic field strength of the external magnetic field is very weak and its influence on the switching component can be ignored". In this technical solution, since the moving part moves relative to the fixed part and has at least a motion component in the Z-axis direction, the direction of the external magnetic field is more likely to cause abnormal action of the moving part, thereby causing the relay to disconnect abnormally. In this technical solution, the switching unit includes a relay and a switching unit connected in parallel. The switching unit and the relay are configured such that the relay is closed and the switching unit is open in the normal working state, so that the switching component remains closed in the normal working state and is only disconnected when the relay is driven to disconnect by an external command. The switching unit and the relay body are separated by a shield to avoid the influence of the magnetic field of the relay body itself on the switching unit.

[0023] The switching unit is placed close to the relay and includes at least one reed switch. The switching unit is adapted to close when an external magnetic field passes through a first region around it; the relay is adapted to open when an external magnetic field passes through a second region around it; the first and second regions at least partially overlap to keep the switching assembly closed. Since the reed switch is more sensitive to the external magnetic field than the relay is to the strength of the external magnetic field, placing the switching unit close to the relay allows the reed switch to be affected by the external magnetic field before the relay. Due to the at least partial overlap of the first and second regions, the switching unit can close before the relay abnormally opens due to the influence of the external magnetic field. When the external magnetic field passes, the switching unit switches to the closed state earlier. At this time, even if the relay also switches to the open state, the switching assembly can still remain closed, thereby improving the safety and reliability of the switching assembly in application. When the reed switch is configured to extend along the Z-axis, it is easier for the reed switch to be affected by an external magnetic field with the magnetic field direction in the Z-axis direction, thus making it easier to close when the external magnetic field direction is in the Z-axis direction, thereby keeping the switching assembly closed. Moreover, the setting of a single reed switch makes it easier to reduce production and assembly costs.

[0024] In the second technical solution and its preferred embodiment, each reed switch is adapted to close when an external magnetic field passes through a third region around it and remain open when an external magnetic field passes through a fourth region around it. The third and fourth regions are arranged circumferentially along the reed switch. When the number of reed switches is at least two, the reed switches are connected in parallel and intersected with each other so that the fourth region of one of the two intersecting reed switches at least partially overlaps with the third region of the other reed switch. This increases the space of the first region when the external magnetic field passes through the switching unit. The parallel connection of the reed switches ensures that at least one reed switch can be switched to the closed state, thereby improving the safety and reliability of the switching assembly application. It should be understood that "the reed switches are intersected with each other" means that "the projection of the intersection point of each reed switch is located on the corresponding reed switch rather than on the extension line of the reed switch along its extension direction".

[0025] In technical solution three and its preferred embodiments, when the number of reed switches is at least two, at least two reed switches in each reed switch intersect each other perpendicularly. Compared with only two reed switches in each reed switch intersecting at an angle, this increases the overlap space between the fourth region of the two perpendicularly intersecting reed switches and the third region of the other reed switch. This can further increase the space of the first region when the external magnetic field passes through the switching unit, thereby further improving the sensitivity range of the switching unit to the external magnetic field and thus improving the safety and reliability of the switching component in application.

[0026] In technical solution four and its preferred embodiments, since the switching unit only includes two perpendicularly intersecting reed switches, the switching unit remains open only when the direction of the external magnetic field is parallel to the direction of the intersecting axis and the external magnetic field approaches the switching unit along the intersecting axis. In other cases, the switching unit closes when the external magnetic field passes through the first region around it. The relay body only abnormally switches to the open state when the external magnetic field approaches the relay along the Z-axis. Therefore, in this technical solution, the switching unit is located on one side of the relay along the X-axis or Y-axis, and the number of reed switches is only two. The intersecting axis of the two reed switches is perpendicular to the Z-axis. This makes the external magnetic field that cannot close the switching unit have a smaller impact on the relay body, while the external magnetic field that affects the relay body can affect the switching unit. This ensures that when the space in the first region is large, the external magnetic field that affects the relay body will act on the switching unit first, so that the switching unit closes before the relay abnormally disconnects, ensuring that the switching assembly remains in the closed state, thereby improving the safety and reliability of the switching assembly application. Furthermore, the switch unit is located on one side of the relay along the X-axis or Y-axis, which helps to reduce the overall space occupied by the switch assembly in the Z-axis direction, thus facilitating the flattening of the switch assembly.

[0027] In technical solution five and its preferred embodiments, the length direction of the relay is the X-axis direction, the moving part includes an armature, and the width direction of the armature is the Y-axis direction; the switching unit is located on one side of the relay along the Y-axis direction, and the cross axis is parallel to the Y-axis direction and located in the middle of the relay. Compared with the switching unit being located on one side of the relay along the X-axis direction, the overlap space of the first region and the second region can be further increased, thereby improving the safety and reliability of the switching assembly application.

[0028] In technical solution six and its preferred embodiment, both reed switches are inclined relative to the Z-axis direction. Compared with the solution where one of the reed switches extends along the Z-axis direction, this is more advantageous for increasing the length of the reed switches under the condition that the length of the switching assembly along the Z-axis direction is constant. This increases the space of the first region and the overlap space of the first and second regions, further ensuring that the switching assembly can remain closed even when an external magnetic field passes through, thus improving the safety and reliability of the switching assembly in application.

[0029] In technical solution seven and its related embodiments, when the switching unit includes only two perpendicularly intersecting reed switches, the switching unit remains open when the direction of the external magnetic field is parallel to the direction of the intersecting axis and the external magnetic field approaches the switching unit along the intersecting axis. In this solution, the number of reed switches is three, and the three reed switches are perpendicularly intersecting each other. Therefore, the switching unit can be closed when the direction of the external magnetic field is parallel to the intersecting axis of two of the perpendicularly intersecting reed switches and approaches the switching unit along the intersecting axis. That is to say, the third region of the newly added reed switch can partially overlap with the fourth region of the other two reed switches, thereby further increasing the space of the first region of the switching unit and increasing the overlap space of the first region and the second region. This further ensures that the switching assembly can maintain its initial working state even when the external magnetic field passes through, and improves the safety and reliability of the switching assembly in application.

[0030] In technical solution eight and its related embodiments, the switching unit is located on one side of the relay along the X-axis or Y-axis, and the extension direction of one of the reeds is perpendicular to the Z-axis. The intersection axis of the remaining two perpendicularly intersecting reeds is parallel to the reed, and the remaining two reeds are inclined relative to the Z-axis. This is beneficial to reduce the space occupied by the overall switching assembly in the Z-axis direction, thereby facilitating the flattening of the switching assembly. Compared with the solution where the extension direction of two of the reeds is perpendicular to the Z-axis, this solution is more advantageous in increasing the length of the reeds under the condition that the length of the switching assembly along the Z-axis is constant. This increases the space of the first region and the overlap space of the first and second regions, further ensuring that the switching assembly can remain closed even when an external magnetic field passes through, thus improving the safety and reliability of the switching assembly in application.

[0031] In technical solution nine, both the relay and the switching unit are electrically connected to the control board, ensuring reliable electrical connection. Each reed switch has pin terminals at both ends, and each pin terminal is plugged into the control board to allow the reed switches to be connected in parallel. This facilitates the electrical connection between the relay and the switching unit and allows the reed switch to be fixed relative to the relay by plugging it into the control board, eliminating the need for other fixing structures and simplifying the structure.

[0032] In technical solution ten, there are three reed switches. Both the relay and the switching unit are electrically connected to the control board, and the electrical connection is reliable. Each reed switch has pin terminals at both ends, and each pin terminal is plugged into the control board so that the reed switches are connected in parallel. This facilitates the electrical connection between the relay and the switching unit, and allows the reed switches to be fixed relative to the relay by plugging them into the control board. No other fixing structure is required, making the structure simpler. One of the reed switches is attached to the control board, making the structure of the switching unit more stable.

[0033] Technical Solution Eleven possesses the technical advantages of Technical Solution Nine. Because the first wall is perpendicular to the Z-axis, the external magnetic field can only approach the safety device along the Z-axis or in a direction inclined relative to the Z-axis. Therefore, even if the switching unit consists of only two perpendicularly intersecting reed switches, since the switching unit is located on the side of the relay along the X-axis or Y-axis, the length of the switching assembly combining the relay and reed switches along the Z-axis is relatively small. Thus, the magnetic field direction of the external magnetic field moving along the X-axis or Y-axis will be blocked by the first wall and cannot be completely parallel to the intersecting axes of the two perpendicularly intersecting reed switches. Therefore, even if the switching unit consists of only two perpendicularly intersecting reed switches, it can ensure that the switching unit closes before the relay abnormally disconnects when the external magnetic field approaches the safety device, thereby ensuring the safety door remains normally closed and improving safety. The outer casing covers the relay and switching unit, protecting them and preventing magnets that generate external magnetic fields from entering the casing, reducing the influence of the external magnetic field.

[0034] Technical solution twelve has the technical advantages of technical solution ten. In this embodiment, regardless of the direction in which the external magnetic field approaches the safety device, the switching unit can generally close before the relay abnormally disconnects, thus ensuring the safety door remains normally closed and improving safety. The outer casing is installed outside the relay and switching unit, which can protect the relay and switching unit and also prevent the magnet that generates the external magnetic field from entering the interior of the casing, reducing the influence of the external magnetic field. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments are briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 is a schematic diagram of the switch assembly and housing according to Embodiment 1 of this application;

[0037] Figure 2 is an exploded perspective view of the switch assembly and housing of Embodiment 1 of this application;

[0038] Figure 3 is a side view of the switch assembly of Embodiment 1 of this application;

[0039] Figure 4 is a top view of the switch assembly of Embodiment 1 of this application;

[0040] Figure 5 is a schematic diagram of the third and fourth closed regions around the reed switch when the direction of the external magnetic field is perpendicular to the reed switch and the reed switch moves perpendicularly to the direction of the external magnetic field in Embodiment 1 of this application.

[0041] Figure 6 is a schematic diagram of the third and fourth closed regions around the reed switch when the direction of the external magnetic field is parallel to and parallel to the direction of the reed switch in Embodiment 1 of this application.

[0042] Figure 7 is a schematic diagram of the first closed area around the switch unit when two reed switches are placed perpendicularly and cross each other in Embodiment 1 of this application, the direction of the external magnetic field is parallel to one of the reed switches and moves in a direction parallel to the reed switch;

[0043] Figure 8 is a schematic diagram of the safety device of Embodiment 1 of this application installed on the first wall;

[0044] Figure 9 is a side view of the switch assembly of Embodiment 2 of this application;

[0045] Figure 10 is a top view of the switch assembly of Embodiment 2 of this application.

[0046] Explanation of key figure labels:

[0047] Wherein: 10. Relay; 11. Relay body; 111. Connection terminal; 12. Shielding cover; 20. Switching unit; 21. Reed switch; 22. Pin terminal; 01. Third area; 02. Fourth area; 30. Control board; 40. Housing; 50. First wall. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are preferred embodiments of the present invention and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0049] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and accompanying drawings of this invention is for distinguishing different objects and not for describing a specific order.

[0050] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this invention, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of this invention.

[0051] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this invention should be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection by other means or components.

[0052] In the claims, description and accompanying drawings of this invention, the terms "comprising," "having," and variations thereof are used to mean "including but not limited to."

[0053] "Normal working condition" means "no external magnetic field passes through or the magnetic field strength of the external magnetic field is very weak and its influence on the switching components can be ignored"; "each reed switch 21 is placed crosswise" means "the projection of the intersection point of each reed switch is located on the corresponding reed switch rather than on the extension line of the reed switch along its extension direction".

[0054] In the claims and the description other than the embodiments, the terms "X-axis direction," "Y-axis direction," and "Z-axis direction" only refer to a feature having one of the aforementioned directions being perpendicular to a feature having another direction, and do not require that they be implemented according to the "X-axis direction," "Y-axis direction," and "Z-axis direction" described in the embodiments. In the embodiments, the X-axis direction is perpendicular to both the Y-axis direction and the Z-axis direction. The X-axis direction can be divided into left and right, the Y-axis direction into front and back, and the Z-axis direction into up and down.

[0055] Example 1

[0056] Referring to Figure 1-7, which shows a switching assembly including a relay 10, a switching unit 20, and an electronic control board 30.

[0057] Referring to Figure 1, relay 10 and switch unit 20 are connected in parallel and configured such that relay 10 is closed and switch unit 20 is open when the switch assembly is operating normally. In this embodiment, both relay 10 and switch unit 20 are electrically connected to the electronic control board 30.

[0058] Referring also to Figure 2, the relay 10 includes a relay body 11 and a shield 12 covering the relay body 11. The relay body 11 includes a fixed part and a moving part. The moving part moves relative to the fixed part and has at least a motion component in the Z-axis direction. In practical applications, the fixed part includes a housing, a coil assembly, and a stationary contact. The moving part includes an armature assembly and a moving contact that are fixed to each other. When the coil of the coil assembly is not energized, the armature assembly is held in the position where the moving contact and the stationary contact are disconnected. When the coil of the coil assembly is energized, the armature assembly moves to close the moving contact and the stationary contact.

[0059] In this embodiment, the relay 10 is a rocker relay 10. The relay body 11 is provided with a connection terminal 111 that is electrically connected to the control board 30. The connection terminal 111 mainly includes the coil terminal of the coil assembly, the stationary lead-out terminal of the stationary contact, and the moving lead-out terminal of the moving contact. In this embodiment, the length direction of the relay 10 is the X-axis direction, the width direction of the relay 10 is the Y-axis direction, and the X-axis, Y-axis, and Z-axis directions are perpendicular to each other. However, it should be understood that in other embodiments, the relay 10 can also be a snap-action relay, a rocker relay, or a direct-acting relay, as long as the moving part has at least a motion component in the Z-axis direction.

[0060] Referring to Figures 3-4, the switching unit 20 is positioned close to the relay 10 and includes at least one reed switch 21; two reed switches 21 are shown in the figures. The switching unit 20 is located on one side of the relay 10 along the X-axis or Y-axis; in this embodiment, the switching unit 20 is located on the side of the relay 10 along the Y-axis. The switching unit 20 is adapted to close when an external magnetic field passes through a first region around it; the relay 10 is adapted to open when an external magnetic field passes through a second region around it; the first and second regions at least partially overlap to keep the switching assembly closed.

[0061] Referring to Figures 5-6, each reed switch 21 is adapted to close when an external magnetic field passes through its surrounding third region 01 and remain open when the external magnetic field passes through its surrounding fourth region 02. The four third regions 01 and four fourth regions 02 are staggered along the circumference of the reed switch 21. When the number of reed switches 21 is at least two, referring to Figure 7, the reed switches 21 are connected in parallel and intersected with each other so that the fourth region 02 of one of the two intersecting reed switches 21 at least partially overlaps with the third region 01 of the other reed switch 21. As can be seen from Figure 7, the closed area formed by the dashed lines completely covers the area around the switching unit 20, that is, the switching unit will close when the magnet appears at any position around the switching unit 20. In this embodiment, the number of reed switches 21 is only two, and the two reed switches 21 intersect each other perpendicularly. The intersection axis of the two reed switches 21 is perpendicular to the Z-axis direction. In Figures 3-4, the intersection axis is parallel to the Y-axis direction and located in the middle of the relay 10, where the middle is the position near the center point of the relay 10. In this embodiment, both reed switches 21 are inclined relative to the Z-axis. Each reed switch 21 has a pin terminal 22 at both ends, and each pin terminal 22 is plugged into the control board 30.

[0062] It should be noted that the third region is a subordinate concept of the first region, and the fourth region 02 is a subordinate concept of the second region. The third region 01 shown in Figures 5 and 6 represents the ideal situation where the external magnet approaches vertically or horizontally. If the magnet approaches irregularly, the actual shapes of the third region 01 and the fourth region 02 will change. In this embodiment, since the moving part moves relative to the fixed part and has at least a motion component in the Z-axis direction, the direction of the external magnetic field in the Z-axis direction is more likely to cause abnormal movement of the moving part, thereby causing the relay 10 to disconnect abnormally. In this embodiment, the switching assembly includes a relay 10 and a switching unit 20 connected in parallel. The switching unit 20 and the relay 10 are configured such that when the switching assembly is in normal working condition, the relay 10 is closed and the switching unit 20 is open, so that the switching assembly remains closed in normal working condition and only disconnects when the relay 10 is driven to disconnect by an external command. The switching unit 20 is separated from the relay body 11 by a shielding cover 12, preventing the magnetic field of the relay body 11 itself from affecting the switching unit 20. The switching unit 20 is placed close to the relay 10 and includes at least one reed switch 21. The switching unit 20 is adapted to close when an external magnetic field passes through a first region around it. The relay 10 is adapted to open when an external magnetic field passes through a second region around it. The first and second regions at least partially overlap to keep the switching assembly closed. Since the reed switch 21 is more sensitive to the external magnetic field than the relay 10 is sensitive to the strength of the external magnetic field, the placement of the switching unit 20 close to the relay 10 allows the reed switch 21 to be affected by the external magnetic field before the relay 10. Because the first and second regions at least partially overlap, the switching unit 20 can close before the relay 10 is abnormally opened due to the external magnetic field. When the external magnetic field passes through, the switching unit 20... The reed switch 20 switches to the closed state earlier. At this time, even if the relay 10 switches to the open state, the switching assembly can still remain in the closed state, thereby improving the safety and reliability of the switching assembly application. Each reed switch 21 is adapted to close when the external magnetic field passes through the third region 01 around it and remain open when the external magnetic field passes through the fourth region 02 around it. The third region 01 and the fourth region 02 are arranged circumferentially along the reed switch 21. When the number of reed switches 21 is at least two, the reed switches 21 are connected in parallel and intersected with each other so that the fourth region 02 of one of the two intersecting reed switches 21 at least partially overlaps with the third region 01 of the other reed switch 21. This can increase the space of the first region when the external magnetic field passes through the switching unit 20. The parallel connection of the reed switches 21 ensures that at least one reed switch 21 can switch to the closed state, thereby improving the safety and reliability of the switching assembly application.

[0063] In this embodiment, when there are at least two reed switches 21, at least two of the reed switches 21 intersect each other perpendicularly. Compared with only two reed switches 21 intersecting at an angle, this increases the overlap space between the fourth region 02 of the two perpendicularly intersecting reed switches 21 and the third region 01 of the other reed switch 21. This can further increase the space of the first region when the external magnetic field passes through the switching unit 20, thereby further improving the sensitivity range of the switching unit 20 to the external magnetic field and thus improving the safety and reliability of the switching assembly in application.

[0064] In this embodiment, since the switching unit 20 only includes two perpendicularly intersecting reed switches 21, the switching unit 20 remains open only when the direction of the external magnetic field is parallel to the direction of the intersecting axis and the external magnetic field approaches the switching unit 20 along the intersecting axis. In other cases, the switching unit 20 closes when the external magnetic field passes through the first region around it. The relay body 11 only abnormally switches to the open state mainly when the external magnetic field approaches the relay 10 along the Z-axis. Therefore, in this embodiment, the switching unit 20 is located on one side of the relay 10 along the X-axis or Y-axis, and the reed switches 21... With only two reed switches 21, and the intersecting axis of the two reed switches 21 perpendicular to the Z-axis, the influence of external magnetic fields that cannot close the switching unit 20 on the relay body 11 is minimized. However, external magnetic fields that affect the relay body 11 can still influence the switching unit 20. This ensures that when the space in the first region is large, external magnetic fields affecting the relay body 11 will act on the switching unit 20 first, causing the switching unit 20 to close before the relay 10 abnormally disconnects. This ensures the switching assembly remains in the closed state, thus improving the safety and reliability of the switching assembly. Furthermore, the switching unit 20 is located on one side of the relay 10 along the X-axis or Y-axis, which also helps reduce the overall space occupied by the switching assembly in the Z-axis direction, thus facilitating a flatter design for the switching assembly.

[0065] In this embodiment, the length direction of the relay 10 is the X-axis direction, the moving part includes an armature, and the width direction of the armature is the Y-axis direction; the switching unit 20 is located on one side of the relay 10 along the Y-axis direction, and the cross axis is parallel to the Y-axis direction and located in the middle of the relay 10. Compared with the switching unit 20 being located on one side of the relay 10 along the X-axis direction, the overlap space of the first region and the second region can be further increased, thereby improving the safety and reliability of the switching assembly application.

[0066] In this embodiment, both reed switches 21 are inclined relative to the Z-axis direction. Compared with the scheme where one of the reed switches 21 extends along the Z-axis direction, it is more advantageous to increase the length of the reed switch 21 under the condition that the length of the switch assembly along the Z-axis direction is constant, thereby increasing the space of the first region and increasing the overlap space of the first region and the second region. This further ensures that the switch assembly can remain closed even when an external magnetic field passes through, and improves the safety and reliability of the switch assembly in application.

[0067] In this embodiment, both the relay 10 and the switch unit 20 are electrically connected to the electronic control board 30, and the electrical connection is reliable. Each reed switch 21 has pin terminals 22 at both ends, and each pin terminal 22 is plugged into the electronic control board 30. This facilitates the electrical connection between the relay 10 and the switch unit 20, and allows the reed switch 21 to be fixed relative to the relay 10 by plugging into the electronic control board 30. No other fixing structure is required, making the structure simpler.

[0068] Referring to Figure 8, this embodiment also provides a safety device for controlling the access control of a safety door and for installation on a fixed first wall 50. The first wall 50 is perpendicular to the Z-axis direction. In practical applications, the first wall 50 can be a wall or a fixed door. The safety device uses the aforementioned switch assembly and also includes a housing 40, which covers the relay 10 and the switch unit 20. In this embodiment, the length of the safety device along the Z-axis direction is less than 20 mm.

[0069] In this embodiment, since the first wall 50 is perpendicular to the Z-axis, the external magnetic field can only approach the safety device along the Z-axis or in a direction inclined relative to the Z-axis. Therefore, even if the switching unit 20 only includes two perpendicularly intersecting reed switches 21, because the switching unit 20 is located on the side of the relay 10 along the X-axis or Y-axis, the length of the switching assembly of the relay 10 and the reed switches 21 along the Z-axis is relatively small. Therefore, the magnetic field direction of the external magnetic field moving along the X-axis or Y-axis will be blocked by the first wall 50 and cannot be completely parallel to the intersection axis of the two perpendicularly intersecting reed switches 21. Therefore, even if the switching unit 20 only includes two perpendicularly intersecting reed switches 21, it can ensure that the switching unit 20 closes before the relay 10 abnormally disconnects when the external magnetic field approaches the safety device, thereby ensuring the normal closure of the safety door and improving safety. The outer shell 40 is installed outside the relay 10 and the switching unit 20. The outer shell 40 can protect the relay 10 and the switching unit 20 and can also prevent the magnet that generates the external magnetic field from entering the interior of the outer shell, reducing the influence of the external magnetic field.

[0070] Example 2

[0071] Example 2 is basically the same as Example 1, except that, as shown in Figures 9-10, there are three reed switches 21, which are perpendicular to each other. The switching unit 20 is located on one side of the relay 10 along the X-axis or Y-axis. In Figure 9-10, the switching unit 20 is located on one side of the relay 10 along the Y-axis, and the extension direction of one of the reed switches 21 is perpendicular to the Z-axis. In Figure 9-10, this reed switch 21 extends along the Y-axis. The intersection axis of the remaining two perpendicularly intersecting reed switches 21 is parallel to the reed switch 21, and the remaining two reed switches 21 are inclined relative to the Z-axis. In Figure 9-10, this intersection axis is parallel to the Y-axis and located in the middle of the relay 10. Both the relay 10 and the switch unit 20 are electrically connected to the control board 30; each reed switch 21 has a pin terminal 22 at both ends, and each pin terminal 22 is plugged into the control board 30 so that the reed switches 21 are connected in parallel; among them, the reed switch 21 perpendicular to the Z-axis direction is attached to the control board 30.

[0072] As can be seen from Examples 1 and 2, when the number of reed switches 21 is at least two, at least two of the reed switches 21 intersect each other perpendicularly.

[0073] In this embodiment, when the switching unit 20 includes only two perpendicularly intersecting reed switches 21, the switching unit 20 remains open when the direction of the external magnetic field is parallel to the direction of the intersecting axis and the external magnetic field approaches the switching unit 20 along the intersecting axis. In this embodiment, the number of reed switches 21 is three, and the three reed switches 21 intersect each other perpendicularly. Therefore, the switching unit 20 can be closed when the direction of the external magnetic field is parallel to the intersecting axis of two of the perpendicularly intersecting reed switches 21 and approaches the switching unit 20 along the intersecting axis. That is to say, the third region 01 of the newly added reed switch 21 can partially overlap with the fourth region 02 of the other two reed switches 21, thereby further increasing the space of the first region of the switching unit 20 and increasing the overlap space of the first region and the second region. This further ensures that the switching assembly can maintain its initial working state even when an external magnetic field passes through, and improves the safety and reliability of the switching assembly in application.

[0074] In this embodiment, the switch unit 20 is located on one side of the relay 10 along the X-axis or Y-axis, and the extension direction of one of the reed switches 21 is perpendicular to the Z-axis. The intersection axis of the remaining two perpendicularly intersecting reed switches 21 is parallel to the reed switch 21, and the remaining two reed switches 21 are inclined relative to the Z-axis. This helps to reduce the space occupied by the switch assembly in the Z-axis direction, which is beneficial to the flattening of the switch assembly. Compared with the scheme where the extension direction of two of the reed switches 21 is perpendicular to the Z-axis, this is more advantageous to increase the length of the reed switches 21 under the condition that the length of the switch assembly along the Z-axis is constant, thereby increasing the space of the first region and increasing the overlap space of the first region and the second region. This further ensures that the switch assembly can remain closed even when an external magnetic field passes through, and improves the safety and reliability of the switch assembly in application.

[0075] In this embodiment, there are three reed switches 21. Both the relay 10 and the switching unit 20 are electrically connected to the control board 30, and the electrical connection is reliable. Each reed switch 21 has a pin terminal 22 at both ends. Each pin terminal 22 is plugged into the control board 30 so that the reed switches 21 are connected in parallel. This facilitates the electrical connection between the relay 10 and the switching unit 20, and allows the reed switch 21 to be fixed relative to the relay 10 by plugging it into the control board 30. No other fixing structure is required, making the structure simpler. With one reed switch 21 attached to the control board 30, the structure of the switching unit 20 is more stable.

[0076] In this embodiment, the safety device is used to control the access control of the security door. The safety device, employing the aforementioned switch assembly, also includes a housing 40, which covers the relay 10 and the switch unit 20. In this embodiment, regardless of the direction in which an external magnetic field approaches the safety device, the switch unit 20 will generally close before the relay 10 abnormally disconnects, thus ensuring the security door remains normally closed and improving safety. The housing 40, covering the relay 10 and the switch unit 20, provides protection for them and also shields against external magnetic fields to a certain extent, reducing their influence.

[0077] Example 3

[0078] Example 3 is basically the same as Example 1, except that there is only one reed switch 21. The reed switch 21 extends along the Z-axis and is located on one side of the relay 10 along the Y-axis.

[0079] When there is only one reed switch 21, the reed switch 21 extends along the Z-axis direction, which makes the reed switch 21 more susceptible to the influence of an external magnetic field with the direction of the Z-axis. This makes it easier for the reed switch 21 to close when the direction of the external magnetic field is the Z-axis, thereby keeping the switch assembly closed. In addition, the setting of one reed switch 21 makes it easier to reduce production and assembly costs.

[0080] The descriptions of the foregoing specification and embodiments are used to explain the scope of protection of the present invention, but do not constitute a limitation on the scope of protection of the present invention. Modifications, equivalent substitutions, or other improvements to the embodiments of the present invention or some of its technical features that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of the present invention or the foregoing embodiments, in conjunction with common general knowledge, ordinary technical knowledge in the art, and / or existing technology, should all be included within the scope of protection of the present invention.

Claims

1. A switching assembly, characterized in that, It includes a relay (10) and a switch unit (20) connected in parallel, wherein the switch unit (20) and the relay (10) are configured such that the relay (10) is closed and the switch unit (20) is open under normal operating conditions; The relay (10) includes a relay body (11) and a shield (12) covering the relay body (11). The relay body (11) includes a fixed part and a moving part. The moving part moves relative to the fixed part and has at least a motion component in the Z-axis direction. The switching unit (20) is positioned close to the relay (10) and includes at least one reed switch (21). The switching unit (20) is adapted to close when an external magnetic field passes through a first region around it; the relay (10) is adapted to open when an external magnetic field passes through a second region around it; the first and second regions at least partially overlap to keep the switching assembly closed.

2. The switching assembly as claimed in claim 1, characterized in that, Each reed switch (21) is adapted to close when an external magnetic field passes through a third region (01) around it and remain open when an external magnetic field passes through a fourth region (02) around it, the third region (01) and the fourth region (02) being arranged circumferentially along the reed switch (21); when the number of the reed switches (21) is at least two, the reed switches (21) are connected in parallel and intersected with each other such that the fourth region (02) of one of the two intersecting reed switches (21) at least partially overlaps with the third region (01) of the other reed switch (21).

3. The switching assembly as claimed in claim 2, characterized in that, The number of reed switches (21) is at least two, and at least two of the reed switches (21) intersect each other perpendicularly.

4. The switching assembly as claimed in claim 3, characterized in that, The switch unit (20) is located on one side of the relay (10) along the X-axis or Y-axis; there are only two reed switches (21), and the cross axis of the two reed switches (21) is perpendicular to the Z-axis, and the X-axis, Y-axis and Z-axis are perpendicular to each other.

5. The switching assembly as claimed in claim 4, characterized in that, The length direction of the relay (10) is the X-axis direction, the moving part includes an armature, and the width direction of the armature is the Y-axis direction; the switching unit (20) is located on one side of the relay (10) along the Y-axis direction, and the cross axis is parallel to the Y-axis direction and located in the middle of the relay (10).

6. The switching assembly as claimed in claim 5, characterized in that, Both reed switches (21) are tilted relative to the Z-axis.

7. The switching assembly as claimed in claim 3, characterized in that, The number of reed switches (21) is three, and the three reed switches (21) cross each other perpendicularly.

8. The switching assembly as claimed in claim 7, characterized in that, The switch unit (20) is located on one side of the relay (10) along the X-axis or Y-axis, and the extension direction of one of the reeds (21) is perpendicular to the Z-axis. The cross axis of the remaining two perpendicularly intersecting reeds (21) is parallel to the reed (21), and the remaining two reeds (21) are both inclined relative to the Z-axis.

9. The switch assembly of any one of claims 4-6, wherein, It also includes an electronic control board (30), and the relay (10) and the switch unit (20) are electrically connected to the electronic control board (30); each reed switch (21) has a pin terminal (22) at both ends, and each pin terminal (22) is plugged into the electronic control board (30) so that the two reed switches (21) are connected in parallel.

10. The switch assembly of claim 7 or 8, wherein, It also includes an electronic control board (30), and the relay (10) and the switch unit (20) are electrically connected to the electronic control board (30); each reed switch (21) has a pin terminal (22) at both ends, and each pin terminal (22) is plugged into the electronic control board (30) so that the three reed switches (21) are connected in parallel; one of the reed switches (21) is attached to the electronic control board (30).

11. The switch assembly of claim 1, wherein, The number of reed switches (21) is one, and the reed switch (21) extends along the Z-axis direction.

12. A safety device for controlling access to a safety door, characterized in that The safety device employs the switch assembly as described in claim 9, which is used to be installed on a fixed first wall (50) that is perpendicular to the Z-axis direction.

13. The safety device as claimed in claim 12, characterized in that, It also includes a housing (40) that covers the relay (10) and switch unit (20) of the switching assembly.

14. A safety device for controlling access to a security door, characterized in that, The safety device employs the switching assembly described in claim 10.

15. The safety device as claimed in claim 14, characterized in that, It also includes a housing (40) that covers the relay (10) and switch unit (20) of the switching assembly.

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