Magnetic lock

Abstract

The utility model discloses a kind of magnetic formula locks, including lock body, lock body includes pedestal, transmission assembly, lock bolt piece and elastic piece, transmission assembly is located at pedestal, and is connected with lock bolt piece transmission, lock bolt piece is slidably connected in pedestal, transmission assembly can drive lock bolt piece sliding to unlock position, lock bolt piece is equipped with first magnetic attraction piece, elastic piece is connected in pedestal and lock bolt piece, wherein, lock bolt piece can also slide to intermediate position, when lock bolt piece is between intermediate position and unlock position, elastic piece can drive lock bolt piece and slide towards unlock position, when lock bolt piece is between intermediate position and locking position, elastic piece can drive lock bolt piece and slide towards locking position. Magnetic attraction force as starting force, when locking, magnetic attraction force and elastic force superposition, make lock bolt piece can extend longer stroke, locking speed is faster. It can improve lock bolt piece stroke under the premise of not increasing magnetic attraction piece size, and locking effect is good.

Description

Technical Field

[0001] This utility model relates to the field of lock-related technology, and in particular to a magnetic lock. Background Technology

[0002] Currently, magnetic locks primarily utilize the attraction between magnetic components installed inside the strike plate and the bolt. When a user needs to lock the door, the magnetic components inside the strike plate and bolt engage, using magnetic force to pull the bolt into and position it inside the strike plate, thus achieving a quick locking action. However, due to common cost considerations, large magnetic components are not incorporated into the locks. Therefore, the actual effective magnetic force generated between the bolt and the strike plate is limited to a relatively small level, resulting in a short extension stroke of the bolt. A short bolt extension means an extremely limited depth into the strike plate, making it difficult to fully guarantee the stability and security of the lock. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a magnetic lock that can solve the problem of a short locking tongue travel.

[0004] A magnetic lock according to a first aspect of the present invention includes: a lock body, the lock body including a base, a transmission assembly, a latch, and an elastic element. The transmission assembly is disposed on the base and is convexly connected to the latch. The latch is slidably connected to the base. The transmission assembly can drive the latch to slide to an unlocked position. The latch is provided with a first magnetic attraction element for driving the latch to slide to a locked position. The elastic element is connected to the base and the latch. The latch can also slide to an intermediate position, the intermediate position being between the locked position and the unlocked position. When the latch is between the intermediate position and the unlocked position, the elastic element can drive the latch to slide toward the unlocked position. When the latch is between the intermediate position and the locked position, the elastic element can drive the latch to slide toward the locked position.

[0005] The magnetic lock according to the embodiments of this utility model has at least the following beneficial effects: When the latch slides to the locked position via the first magnetic attractor, it can be inserted into the corresponding door strike box for locking. When the door is opened, the transmission component can drive the latch to the unlocked position to disengage from the door strike box. When the latch moves between the middle position and the unlocked position, the elastic member can drive the latch towards the unlocked position, thereby keeping the latch in the unlocked position. When the door is closed, the first magnetic attractor is attracted by the second magnetic attractor in the door strike box. The latch can slide from the unlocked position to the middle position through the magnetic attraction. Then, the direction of the elastic force applied by the elastic member to the latch changes, driving the latch towards the locked position. Therefore, the magnetic attraction force of the magnetic attractor as the starting force does not need to be too large, so the size of the magnetic attractor does not need to be increased. When the latch extends to lock, the magnetic attraction force and the elastic force are superimposed, allowing the latch to extend a longer stroke and at a faster speed. In summary, the extension stroke of the latch can be increased without increasing the size of the magnetic attractor, resulting in a good locking effect.

[0006] According to some embodiments of the present invention, the base is provided with a first connecting part, the locking tongue is provided with a second connecting part, the elastic member includes a first elastic strip, the first elastic strip has a first bending compression part in the middle, one end of the first elastic strip is connected to the first connecting part, and the other end is connected to the second connecting part. The direction of the elastic force applied by the first elastic strip to the first connecting part is opposite to the direction of the elastic force applied by the first elastic strip to the second connecting part. In the middle position, the first connecting part and the second connecting part are on the same vertical line.

[0007] According to some embodiments of the present invention, the locking tongue is further provided with a third connecting portion, the first connecting portion is located between the third connecting portion and the second connecting portion, the locking tongue is provided with a clearance groove to avoid the first connecting portion, and the elastic member further includes a second elastic strip, the second elastic strip has a second bending compression portion in the middle, one end of the second elastic strip is connected to the third connecting portion, and the other end is connected to the first connecting portion, the direction of the elastic force applied by the second elastic strip to the first connecting portion is opposite to the direction of the elastic force applied by the second elastic strip to the third connecting portion, and in the intermediate position, the first connecting portion, the second connecting portion and the third connecting portion are on the same vertical line.

[0008] According to some embodiments of the present invention, the first elastic strip and the second elastic strip are connected as an integral structure.

[0009] According to some embodiments of the present invention, the locking tongue includes a locking tongue portion and a slider portion. The locking tongue portion is provided with a first magnetic suction member, the clearance groove is provided in the slider portion, the second connecting portion and the third connecting portion are provided in the slider portion, the base has a receiving cavity, the first connecting portion is provided in the receiving cavity, the slider portion slides in the receiving cavity, in the unlocked position, the locking tongue portion is retracted into the receiving cavity, and in the locked position, the locking tongue portion protrudes out of the receiving cavity.

[0010] According to some embodiments of the present invention, both the first bending compression portion and the second bending compression portion are arranged in a direction away from the locking tongue portion.

[0011] According to some embodiments of the present invention, a door latch box is also included. The door latch box has a lock groove with an opening facing the lock body. A movable member is provided in the lock groove. The movable member is provided with a second magnetic member for attracting the first magnetic member. The movable member can move to a first position and a second position. In the first position, the movable member moves close to the opening of the lock groove. In the second position, the movable member moves close to the bottom wall of the lock groove.

[0012] According to some embodiments of the present invention, one end of the movable member is rotatably connected to the lock groove. In the first position, the other end of the movable member swings to the opening of the lock groove. In the second position, the other end of the movable member swings to abut against the bottom wall of the lock groove.

[0013] According to some embodiments of the present invention, the lock groove is provided with a limiting part. In the first position, the movable member can abut against the limiting part to restrict the movable member from leaving the lock groove.

[0014] According to some embodiments of the present invention, the transmission assembly includes a handle shaft and a swing member. The handle shaft is rotatably connected to the base. One end of the swing member is pivotally connected to the base. The handle shaft is drively connected to the swing member. Rotating the handle shaft can drive the swing member to swing. The latch has a first protrusion and a second protrusion. The first protrusion and the second protrusion are spaced apart along the sliding direction of the latch. The swing end of the swing member is located between the first protrusion and the second protrusion.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic diagram of the external structure of some embodiments of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of the lock body and bolt in the unlocked position.

[0019] Figure 3 This is a schematic diagram of the internal structure of the lock body and bolt in the locked position.

[0020] Figure 4 This is an exploded view of the lock body;

[0021] Figure 5 An exploded view of the door latch box;

[0022] Figure 6 This is a force analysis diagram of the lock body and bolt in the unlocked position.

[0023] Figure 7 This is a force analysis diagram of the lock body and bolt in the middle position.

[0024] Figure 8 This is a force analysis diagram of the lock body and bolt in the locked position.

[0025] Figure label:

[0026] Lock body 100, base 110, first connecting part 111, receiving cavity 112, transmission assembly 120, handle shaft 121, swinging part 122, locking tongue part 130, first magnetic suction part 131, second connecting part 132, third connecting part 133, clearance groove 134, locking tongue part 135, locking tongue body 1351, cover 1352, slider part 136, mounting slot 1361, first protrusion 137, second protrusion 138, elastic element 140, first elastic strip 141, first bending compression part 1411, second elastic strip 142, second bending compression part 1421;

[0027] Door latch box 200, lock groove 210, limit part 211, moving part 220, second magnetic suction part 221. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not 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 a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Reference Figures 1 to 8According to a first aspect of the present invention, a magnetic lock includes a lock body 100. The lock body 100 includes a base 110, a transmission assembly 120, a latch 130, and an elastic member 140. The transmission assembly 120 is disposed on the base 110 and is convexly connected to the latch 130. The latch 130 is slidably connected to the base 110. The transmission assembly 120 can drive the latch 130 to slide to the unlocked position. The latch 130 is provided with a mechanism for driving the latch 130 to slide to the locked position. The first magnetic attractor 131 and the elastic member 140 are connected to the base 110 and the locking tongue 130. The locking tongue 130 can also slide to the middle position, which is between the locked position and the unlocked position. When the locking tongue 130 is between the middle position and the unlocked position, the elastic member 140 can drive the locking tongue 130 to slide towards the unlocked position. When the locking tongue 130 is between the middle position and the locked position, the elastic member 140 can drive the locking tongue 130 to slide towards the locked position. When the latch 130 slides to the locked position via the first magnetic attractor 131, it can be inserted into the corresponding door strike box 200 for locking. When the door is opened, the transmission assembly 120 can be connected to the door handle. The door handle drives the latch 130 to the unlocked position via the transmission assembly 120 to disengage from the door strike box 200. When the latch 130 moves between the middle position and the unlocked position, the elastic member 140 can drive the latch 130 towards the unlocked position, thereby keeping the latch 130 in the unlocked position. When the door is closed, the first magnetic attractor 131... The latch 130 is attracted by the second magnetic element 221 inside the door latch box 200. The latch 130 slides from the unlocked position past the middle position due to the magnetic attraction. Then, the elastic force applied to the latch 130 by the elastic element 140 changes direction, driving the latch 130 towards the locked position. Therefore, the magnetic attraction force of the magnetic element, as the starting force, does not need to be too large, and the size of the magnetic element does not need to be increased. When the latch 130 extends to lock, the magnetic attraction force and the elastic force are superimposed, allowing the latch 130 to extend a longer stroke and at a faster speed. In summary, this embodiment can increase the extension stroke of the latch 130 without increasing the size of the magnetic element, resulting in a good locking effect.

[0032] Reference Figures 2 to 4 ,as well as Figures 6 to 8In some embodiments of this utility model, the base 110 is provided with a first connecting portion 111, the locking tongue 130 is provided with a second connecting portion 132, and the elastic member 140 includes a first elastic strip 141. The first elastic strip 141 has a first bending and compression portion 1411 in the middle. One end of the first elastic strip 141 is connected to the first connecting portion 111, and the other end is connected to the second connecting portion 132. The direction in which the first elastic strip 141 applies an elastic force to the first connecting portion 111 is opposite to the direction in which the first elastic strip 141 applies an elastic force to the second connecting portion 132. In the intermediate position, the first connecting portion 111 and the second connecting portion 132 are on the same vertical line. Specifically, the first connecting portion 111 is fixed to the base 110 and can be configured as a connecting post. Similarly, the second connecting portion 132 on the locking tongue 130 can also be configured as a connecting post. It is understood that the locking tongue 130 and the base 110 have a sliding engagement track structure. When the locking tongue 130 slides, the second connecting part 132 and the first connecting part 111 can generate relative movement. The first elastic strip 141 can be made by bending a metal strip. The first bent compression part 1411 in the middle of the first elastic strip 141 can be made by bending a metal strip and winding it into a spiral structure. One end of the metal strips extending from both sides of the first bent compression part 1411 is connected to the first connecting part 111. The connection method can be to wrap it around the connecting post. The other end of the metal strip can be wound and connected to the second connecting part 132. When the metal strips extending from both sides of the first bent compression part 1411 approach each other, they can compress to form elastic potential energy and apply an elastic force F0 to the first connecting part 111 and the second connecting part 132. In actual use, when the transmission assembly 120 drives the locking tongue 130 to unlock, refer to... Figure 7 When the latch 130 slides towards the unlocked position to the middle position, the second connecting portion 132 slides directly above or below the first connecting portion 111. At this time, the directions of FO acting on the first connecting portion 111 and the second connecting portion 132 cancel each other out in the vertical direction. Therefore, the elastic member 140 has no driving force on the latch 130. (Refer to...) Figure 6 When the locking tongue 130 slides past the middle position, the second connecting part 132 is located on the side of the first connecting part 111 near the unlock position. At this time, the direction of F0 on the second connecting part 132 is inclined away from the first connecting part 111 along the direction from the locked position to the unlock position. Therefore, F0 can have a component force F1 in the direction of the unlock position, and F1 can drive the locking tongue 130 to remain in the unlock position.

[0033] When the door is closed, the first magnetic member 131 of the latch 130 aligns with the corresponding door latch box 200. At this time, the first magnetic member 131 has a magnetic field F in the direction of the locked position, and the magnetic field F can be greater than F1. The latch 130 slides towards the locked position. Figure 8When the latch 130 slides past the middle position, the second connecting part 132 is located on the side of the first connecting part 111 near the locking position. At this time, the direction of F0 acting on the second connecting part 132 is inclined away from the first connecting part 111 along the direction from the unlocking position to the locking position. Therefore, F0 has a downward component force F1 in the locking position direction. F1 can drive the latch 130 to move towards the locking position, thereby increasing the locking stroke and locking speed of the latch 130. Furthermore, the above structure only requires the addition of a low-cost metal strip elastic element 140, without the need for a large-sized magnetic structure. This can improve the locking effect of the lock and save manufacturing costs, thus resolving the technical contradiction between cost and effect.

[0034] It is understandable that the first bending compression portion 1411 can also be bent directly, so that the first elastic strip 141 is approximately "U" shaped. Alternatively, the first bending compression portion 1411 can be bent into other shapes.

[0035] Reference Figures 2 to 4 ,as well as Figures 6 to 8 In some embodiments of this utility model, the locking tongue 130 is further provided with a third connecting portion 133, and the first connecting portion 111 is located between the third connecting portion 133 and the second connecting portion 132. The locking tongue 130 is provided with a relief groove 134 to avoid the first connecting portion 111. The elastic member 140 also includes a second elastic strip 142. The second elastic strip 142 has a second bending compression portion 1421 in the middle. One end of the second elastic strip 142 is connected to the third connecting portion 133, and the other end is connected to the first connecting portion 111. The direction in which the second elastic strip 142 applies elastic force to the first connecting portion 111 is opposite to the direction in which the second elastic strip 142 applies elastic force to the third connecting portion 133. In the middle position, the first connecting portion 111, the second connecting portion 132 and the third connecting portion 133 are on the same vertical line. Specifically, the third connecting part 133 can be symmetrically arranged with the second connecting part 132. The symmetrical plane can be set as the horizontal plane of the center line of the first connecting part 111 along the sliding direction. The first connecting part 111 is located in the middle of the locking tongue 130 in the vertical direction. The sliding direction of the locking tongue 130 can be orthogonal to the vertical direction. Therefore, the locking tongue 130 is provided with a relief groove 134 to avoid the first connecting part 111, so that the locking tongue 130 does not interfere with the first connecting part 111 when it slides. A second elastic strip 142 can also be provided between the third connecting part 133 and the first connecting part 111. The second elastic strip 142 has the same structure as the first elastic strip 141. The symmetrical arrangement allows the vertical component of the locking tongue 130 to be canceled out, allowing the locking tongue 130 to slide smoothly on the base 110. The F0 applied by the second elastic strip 142 to the third connecting part 133 is superimposed with the F0 of the second connecting part 132, which can ultimately increase the F1 that drives the locking tongue 130 to unlock or lock, thereby further improving the locking effect of the locking tongue 130.

[0036] Reference Figures 2 to 4 In some embodiments of this utility model, the first elastic strip 141 and the second elastic strip 142 are connected as an integral structure. It is understood that the first elastic strip 141 and the second elastic strip 142 can be formed by bending a metal strip, which can save costs and facilitate assembly.

[0037] Reference Figures 2 to 4 In some embodiments of this utility model, the locking tongue 130 includes a locking tongue portion 135 and a slider portion 136. The locking tongue portion 135 is provided with a first magnetic suction member 131, a clearance groove 134 is provided in the slider portion 136, a second connecting portion 132 and a third connecting portion 133 are provided in the slider portion 136, and the base 110 has a receiving cavity 112. The first connecting portion 111 is provided in the receiving cavity 112, and the slider portion 136 slides in the receiving cavity 112. In the unlocked position, the locking tongue portion 135 is retracted into the receiving cavity 112, and in the locked position, the locking tongue portion 135 protrudes out of the receiving cavity 112. Specifically, the base 110 can be rectangular in shape, extending along the sliding direction of the latch 130. An opening for the latch 135 to pass through is provided on the side near the door latch box 200. The slider 136 slides into the receiving cavity 112. The slider 136 can have columnar second connecting portions 132 and third connecting portions 133 on the upper and lower sides of the clearance groove 134. The slider 136 can also have a mounting slot 1361 for mounting the latch 135. The latch 135 includes a latch body 1351 and a cover 1352. The first magnetic member 131 can be snapped into the mounting slot 1361. The latch body 1351 can be mounted on one side of the first magnetic member 131. The cover 1352 can cover part of the latch body 1351 and the first magnetic member 131, and the cover 1352 engages with the slider 136 to fix it to the slider 136 for easy assembly.

[0038] Reference Figures 2 to 4 In some embodiments of this utility model, the first bending compression portion 1411 and the second bending compression portion 1421 are both arranged in a direction away from the locking tongue portion 135. This avoids the locking tongue portion 135 and facilitates full utilization of the receiving cavity 112 within the base 110, making the structure of the base 110 more compact.

[0039] Reference Figures 2 to 5In some embodiments of this utility model, a door latch box 200 is also included. The door latch box 200 has a lock groove 210 with an opening facing the lock body 100. A movable member 220 is provided in the lock groove 210. The movable member 220 is provided with a second magnetic member 221 for attracting the first magnetic member 131. The movable member 220 can move to a first position and a second position. In the first position, the movable member 220 moves close to the opening of the lock groove 210. In the second position, the movable member 220 moves close to the bottom wall of the lock groove 210. Specifically, the second magnetic member 221 can be installed in the movable member 220. The second magnetic member 221 can attract each other with the first magnetic member 131. The connection method between the movable member 220 and the lock groove 210 is not limited here. When unlocking the door, the latch 130 slides towards the unlock position and moves away from the lock groove 210. At this time, the movable member 220 can move towards the opening direction of the lock groove 210 along with the latch 130, thereby reducing the distance between the second magnetic member 221 and the first magnetic member 131. When closing the door, the movable member 220 attracts the latch 130 and moves to the second position to achieve locking. Since the distance between the first magnetic member 131 and the second magnetic member 221 located in the first position of the movable member 220 is shortened before closing the door, the magnetic attraction between the magnetic members increases, which can meet the magnetic attraction requirements without increasing the size of the first magnetic member 131 and the second magnetic member. Furthermore, the magnetic attraction will not decrease even if the depth of the lock groove 210 is increased and the locking stroke of the latch 130 is increased.

[0040] Reference Figure 2 , Figure 3 and Figure 5 In some embodiments of this utility model, one end of the movable member 220 is rotatably connected to the lock groove 210. In the first position, the other end of the movable member 220 swings to the opening of the lock groove 210, and in the second position, the other end of the movable member 220 swings to abut against the bottom wall of the lock groove 210. Specifically, the movable member 220 can be pivotally connected to the lower or upper part of the lock groove 210 near the bottom wall. The movable member 220 can swing within the lock groove 210. When unlocking, the movable member 220 can swing to the second position near the opening of the lock groove 210 to shorten the distance between the second magnetic member 221 and the first magnetic member 131. When locking, the locking tongue 130 can push the movable member 220 to swing back to the bottom wall of the lock groove 210. Through the above structure, the effect of shortening the distance of the magnetic members can be achieved.

[0041] Understandably, the movable part 220 can also move to a second position under its own gravity. For example, the bottom wall of the lock groove 210 can be inclined so that the movable part 220 has a tendency to swing downward.

[0042] It is conceivable that the movable component 220 can also be slidably connected within the lock groove 210. When unlocking, the movable component 220 can slide with the latch 130 to a second position near the opening of the lock groove 210. When locking, it can slide to a first position near the bottom wall of the lock groove 210. Furthermore, the movable component 220 can slide towards the second position under its own weight, for example, by providing a ramp on the lower side wall of the lock groove 210 to guide the movable component 220 to slide to the second position.

[0043] Reference Figure 2 In some embodiments of this utility model, the lock groove 210 is provided with a limiting part 211. In the first position, the movable member 220 can abut against the limiting part 211 to restrict the movable member 220 from disengaging from the lock groove 210. Specifically, the limiting part 211 can be provided near the opening of the lock groove 210, and the movable member 220 can abut against the limiting part 211 to achieve limiting. The specific structure of the limiting part 211 is not limited here.

[0044] Reference Figures 2 to 4 In some embodiments of this utility model, the transmission assembly 120 includes a handle shaft 121 and a swing member 122. The handle shaft 121 is rotatably connected to the base 110. One end of the swing member 122 is pivotally connected to the base 110. The handle shaft 121 and the swing member 122 are connected in a transmission manner. Rotating the handle shaft 121 can drive the swing member 122 to swing. The latch 130 is provided with a first protrusion 137 and a second protrusion 138. The first protrusion 137 and the second protrusion 138 are spaced apart along the sliding direction of the latch 130. The swing end of the swing member 122 is located between the first protrusion 137 and the second protrusion 138. Specifically, the handle shaft 121 is connected to the door handle in a transmission manner. Rotating the door handle can drive the handle shaft 121 to rotate. A transmission part is provided between the handle shaft 121 and the swing member 122, which can drive the swing member 122 to swing. When the swing end of the swing member 122 swings at the first protrusion 137 and the second protrusion 138, it can drive the lock tongue 130 to move, thereby unlocking.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A magnetic lock, characterized in that, include: The lock body (100) includes a base (110), a transmission assembly (120), a latch (130), and an elastic element (140). The transmission assembly (120) is disposed on the base (110) and is connected to the latch (130) in a transmission manner. The latch (130) is slidably connected to the base (110). The transmission assembly (120) can drive the latch (130) to slide to the unlock position. The latch (130) is provided with a first magnetic suction element (131) for driving the latch (130) to slide to the lock position. The elastic element (140) is connected to the base (110) and the latch (130). The locking tongue (130) can also slide to a middle position, which is between the locked position and the unlocked position. When the locking tongue (130) is between the middle position and the unlocked position, the elastic member (140) can drive the locking tongue (130) to slide towards the unlocked position. When the locking tongue (130) is between the middle position and the locked position, the elastic member (140) can drive the locking tongue (130) to slide towards the locked position.

2. The magnetic lock according to claim 1, characterized in that, The base (110) is provided with a first connecting part (111), the locking tongue (130) is provided with a second connecting part (132), and the elastic member (140) includes a first elastic strip (141). The first elastic strip (141) has a first bending compression part (1411) in the middle. One end of the first elastic strip (141) is connected to the first connecting part (111), and the other end is connected to the second connecting part (132). The direction in which the first elastic strip (141) applies an elastic force to the first connecting part (111) is opposite to the direction in which the first elastic strip (141) applies an elastic force to the second connecting part (132). In the middle position, the first connecting part (111) and the second connecting part (132) are on the same vertical line.

3. The magnetic lock according to claim 2, characterized in that, The locking tongue (130) is further provided with a third connecting part (133), and a first connecting part (111) is located between the third connecting part (133) and the second connecting part (132). The locking tongue (130) is provided with a relief groove (134) to avoid the first connecting part (111). The elastic member (140) further includes a second elastic strip (142). The second elastic strip (142) has a second bending compression part (1421) in the middle. One end of the second elastic strip (142) is connected to the third connecting part (133), and the other end is connected to the first connecting part (111). The direction in which the second elastic strip (142) applies an elastic force to the first connecting part (111) is opposite to the direction in which the second elastic strip (142) applies an elastic force to the third connecting part (133). In the middle position, the first connecting part (111), the second connecting part (132), and the third connecting part (133) are on the same vertical line.

4. The magnetic lock according to claim 3, characterized in that, The first elastic strip (141) and the second elastic strip (142) are connected as an integral structure.

5. The magnetic lock according to claim 3, characterized in that, The locking tongue (130) includes a locking tongue portion (135) and a slider portion (136). The locking tongue portion (135) is provided with a first magnetic suction member (131). The clearance groove (134) is provided in the slider portion (136). The second connecting portion (132) and the third connecting portion (133) are provided in the slider portion (136). The base (110) has a receiving cavity (112). The first connecting portion (111) is provided in the receiving cavity (112). The slider portion (136) slides in the receiving cavity (112). In the unlocked position, the locking tongue portion (135) is retracted into the receiving cavity (112). In the locked position, the locking tongue portion (135) protrudes out of the receiving cavity (112).

6. The magnetic lock according to claim 5, characterized in that, Both the first bending compression portion (1411) and the second bending compression portion (1421) are arranged in a direction away from the locking tongue portion (135).

7. The magnetic lock according to claim 1, characterized in that, It also includes a door latch box (200), which has a lock groove (210) with an opening facing the lock body (100). The lock groove (210) is provided with a movable member (220), which is provided with a second magnetic member (221) for attracting the first magnetic member (131). The movable member (220) can move to a first position and a second position. In the first position, the movable member (220) moves to be close to the opening of the lock groove (210). In the second position, the movable member (220) moves to be close to the bottom wall of the lock groove (210).

8. The magnetic lock according to claim 7, characterized in that, One end of the movable part (220) is rotatably connected to the lock groove (210). In the first position, the other end of the movable part (220) swings to the opening of the lock groove (210). In the second position, the other end of the movable part (220) swings to abut against the bottom wall of the lock groove (210).

9. The magnetic lock according to claim 7 or 8, characterized in that, The locking groove (210) is provided with a limiting part (211). In the first position, the movable member (220) can abut against the limiting part (211) to restrict the movable member (220) from disengaging from the locking groove (210).

10. The magnetic lock according to claim 1, characterized in that, The transmission assembly (120) includes a handle shaft (121) and a swing member (122). The handle shaft (121) is rotatably connected to the base (110). One end of the swing member (122) is pivotally connected to the base (110). The handle shaft (121) and the swing member (122) are connected in a transmission manner. Rotating the handle shaft (121) can drive the swing member (122) to swing. The latch (130) is provided with a first protrusion (137) and a second protrusion (138). The first protrusion (137) and the second protrusion (138) are spaced apart along the sliding direction of the latch (130). The swing end of the swing member (122) is located between the first protrusion (137) and the second protrusion (138).

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