Relay capable of being switched on and off manually

Abstract

The utility model discloses a relay capable of being opened and closed manually, which comprises a shell, a knob assembly, a contact assembly and a pushing assembly, the contact assembly and the pushing assembly are both arranged in an inner cavity of the shell, the knob assembly is arranged at the top of the shell and extends downwards to the inner cavity of the shell so as to be in contact with the pushing assembly, and the top end of the knob assembly does not exceed the top end of the shell; the shell is provided with a first fixing position and a second fixing position which are used for fixing the knob assembly, the first fixing position is arranged above the second fixing position, and the knob assembly can be movably switched to the first fixing position or the second fixing position so that the contact assembly can be disconnected or connected through the pushing assembly. The relay capable of being manually switched on and off solves the technical problem that a manual switch is easily touched by mistake.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a relay which can be switched manually. Background Art

[0002] A relay is an electronic control device with a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is usually used in automatic control circuits. In fact, it is an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] The relay can use the electromagnetic system to realize the on and off of the contact assembly when the power is on, and can also use the manual switch to realize the on and off of the contact assembly when the power is off. The existing manual switches of relays have a buckle structure, a pull-out structure, etc., which are generally exposed to the outside of the relay and are easily accidentally touched and cut off the working state inside the relay. Utility Model Content

[0004] In order to overcome at least one of the defects of the prior art described above, the utility model provides a relay that can be manually switched on and off to solve the technical problem that the manual switch is easily touched by mistake.

[0005] The technical solution adopted by the utility model to solve the problem is:

[0006] A manually switchable relay comprises: a housing, a knob assembly, a contact assembly and a push assembly, wherein the contact assembly and the push assembly are both arranged in the inner cavity of the housing, the knob assembly is arranged at the top of the housing and extends downward to the inner cavity of the housing to contact the push assembly, and the top end of the knob assembly does not exceed the top end of the housing;

[0007] The shell is provided with a first fixing position and a second fixing position for fixing the knob assembly, the first fixing position is arranged above the second fixing position, and the knob assembly can be moved and switched to the first fixing position or the second fixing position to disconnect or connect the contact assembly by pushing the assembly.

[0008] Furthermore, the housing includes an upper cover, a middle shell and a base connected in sequence from top to bottom, the contact assembly and the push assembly are both arranged in the middle shell, a cover plate is provided on the top of the middle shell, and a second through hole is provided on the cover plate that penetrates vertically;

[0009] The upper cover is provided with a first through hole running vertically therethrough, and the hole wall of the first through hole is provided with a first fixing position and a second fixing position for fixing the knob assembly, and the position of the first through hole corresponds to the position of the second through hole. The knob assembly can be vertically slidably arranged in the first through hole to switch between the first fixed position and the second fixed position, and its lower part can vertically slide through the second through hole to contact the pushing assembly.

[0010] Furthermore, the knob assembly includes a knob and an elastic member. The knob can be vertically slidably arranged in the first through hole to switch between the first fixed position and the second fixed position. The knob includes a pressing part and a transmission part. The transmission part is fixed at the bottom of the pressing part and extends downward to be able to slide through the second through hole to contact the pushing assembly. The top of the pressing part does not exceed the top of the shell. The elastic member is vertically connected between the pressing part and the cover plate.

[0011] Furthermore, the side of the pressing portion is provided with a radially outwardly protruding card protrusion, the hole wall of the first through hole is provided with a first card slot and a second card slot adapted to the card protrusion, the first card slot is arranged above the second card slot, and the knob can be vertically slid to the first card slot or the second card slot (to disconnect or connect the contact assembly by pushing the assembly).

[0012] Furthermore, two radially symmetrical clamping protrusions are provided, and the number of the first clamping slots and the number of the second clamping slots are equal to the number of the clamping protrusions, and the positions correspond one to one.

[0013] Furthermore, both the first card slot and the second card slot are provided with openings vertically downward and radially inward, so that the card protrusion can slide vertically in the first card slot or the second card slot and can slide out through the bottom, and the first card slot is arranged obliquely above the second card slot.

[0014] Furthermore, an arc-shaped slide rail is provided between the bottom of the first slot and the bottom of the second slot, and the locking protrusion of the knob can slide back and forth along the slide rail to switch between the first slot and the second slot.

[0015] Furthermore, a limit plate is extended upward from the top end of the cover plate. The limit plate is arranged on the outer peripheral side of the second through hole and corresponds to the position of the elastic member. The lower part of the elastic member is arranged in the limit plate.

[0016] Furthermore, the pressing part, the transmission part and the clamping protrusion are connected into an integrated structure.

[0017] Further, the projection of the transmission part on the horizontal plane is located within the projection of the pressing part on the horizontal plane, the top end of the elastic member abuts against the bottom of the pressing part, and the bottom end of the elastic member abuts against the top of the cover plate.

[0018] Beneficial effects:

[0019] The relay of the utility model realizes the on and off of the contact assembly through the push assembly by moving the knob assembly between the first fixed position and the second fixed position, so that when the relay is not powered, the contact assembly can be turned on and off by a manual switch. Since the knob assembly is arranged inside the top of the housing and the top of the knob assembly does not exceed the top of the housing, it is avoided that the knob assembly is exposed outside the relay and is easily touched by mistake. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the relay that can be manually switched in the utility model;

[0021] Figure 2 for Figure 1 Exploded diagram of

[0022] Figure 3 It is a cross-sectional view of the manually switchable relay of the utility model;

[0023] Figure 4 It is a cross-sectional view of the housing of the utility model;

[0024] Figure 5 for Figure 4 The enlarged view of point A in the middle;

[0025] Figure 6 This is a schematic diagram of the internal structure of the manually switchable relay of the utility model;

[0026] Figure 7 It is a structural schematic diagram of the knob assembly, contact assembly and push assembly of the utility model;

[0027] Figure 8 for Figure 7 Exploded diagram of .

[0028] The meanings of the reference numerals are as follows:

[0029] 1. Shell; 11. Upper cover; 111. First through hole; 112. First card slot; 113. Second card slot; 114. Slide rail; 12. Middle shell; 121. Cover plate; 122. Second through hole; 123. Stop plate; 13. Base; 2. Knob assembly; 21. Knob; 211. Pressing part; 212. Transmission part; 213. Card convex; 22. Elastic member; 3. Contact assembly; 31. Moving spring; 311 , first moving contact; 312, second moving contact; 313, through hole; 32, first static spring; 321, normally closed contact; 322, avoidance hole; 33, second static spring; 331, normally open contact; 4, pushing assembly; 41, armature; 411, force-bearing part; 412, pushing part; 413, plug-in; 42, pushing piece; 421, slot; 422, extension part; 423, pushing end; 5, electromagnetic assembly. DETAILED DESCRIPTION

[0030] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0033] A relay is an electronic control device with a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is usually used in automatic control circuits. In fact, it is an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit.

[0034] The working state of the relay is generally carried out under the condition of power supply, so as to realize the on and off of the contact assembly by using the electromagnetic component. However, when the power is not supplied, the relay also needs to be connected or tested, and a manual switch is required to complete it. The existing manual switches of relays have a buckle structure, a pull-out structure, etc., which are generally exposed to the outside of the relay and are easily accidentally touched and cut off the working state inside the relay.

[0035] To this end, the utility model provides a relay that can be manually switched. Figure 1 and Figure 2 The relay comprises a housing 1, a knob assembly 2, a contact assembly 3 and a push assembly 4. Figure 3 The housing 1 is provided with an inner cavity with a receiving function, the contact assembly 3 and the push assembly 4 are both provided in the inner cavity of the housing 1, the knob assembly 2 is provided at the top of the housing 1 and extends downward to the inner cavity of the housing 1 to contact the push assembly 4, and the top of the knob assembly 2 does not exceed the top of the housing 1. The housing 1 is provided with a first fixing position and a second fixing position for fixing the knob assembly 2, the first fixing position is provided above the second fixing position, and the knob assembly 2 can be moved and switched to the first fixing position or the second fixing position to disconnect or connect the contact assembly 3 through the push assembly 4.

[0036] Specifically, when the knob assembly 2 is located at the first fixed position, the knob assembly 2 is arranged away from the push assembly 4, or the knob assembly 2 does not generate an action force on the push assembly 4, so that the push assembly 4 does not generate an action force on the contact assembly 3, and the contact assembly 3 is in a disconnected state. When the knob assembly 2 is located at the second fixed position, the knob assembly 2 contacts the push assembly 4 and generates an action force on the push assembly 4, so that the push assembly 4 generates an action force on the contact assembly 3, so that the contact assembly 3 is turned on.

[0037] Thus, the relay of the present invention switches the contact assembly 3 on and off through the push assembly 4 by moving the knob assembly 2 between the first fixed position and the second fixed position, so that when the relay is not powered, the contact assembly 3 can be switched on and off by a manual switch. Since the knob assembly 2 is arranged inside the top of the housing 1 and the top of the knob assembly 2 does not exceed the top of the housing 1, the knob assembly 2 is not exposed to the outside of the relay and is easily touched by mistake, so as to avoid affecting the working state inside the relay.

[0038] See also Figure 2 The housing 1 includes an upper cover 11, a middle shell 12 and a base 13 connected in sequence from top to bottom. The contact assembly 3 and the push assembly 4 are both arranged in the middle shell 12. A cover plate 121 is provided on the top of the middle shell 12. The cover plate 121 is provided with a second through hole 122 that penetrates vertically. The upper cover 11 is provided with a first through hole 111 that penetrates vertically. The hole wall of the first through hole 111 is provided with a first fixing position and a second fixing position for fixing the knob assembly 2. The position of the first through hole 111 corresponds to the position of the second through hole 122. The knob assembly 2 can be vertically slidably arranged in the first through hole 111 to switch between the first fixing position and the second fixing position, and its lower part can vertically slide through the second through hole 122 to contact the push assembly 4.

[0039] For details, see Figure 2 , Figure 4 and Figure 5 The middle shell 12 is a structure with a hollow interior, a cover plate 121 on the top, and an opening at the bottom. The bottom opening of the middle shell 12 is adapted to the base 13, so that the middle shell 12 covers the base 13 to form an inner cavity to accommodate the contact assembly 3 and the push assembly 4. The upper cover 11 covers the middle shell 12. Except for the first through hole 111 that runs vertically through the upper cover 11, the structure of the rest of the upper cover 11 is designed according to the specific structure of the relay in actual application, and is not limited here. Since the upper cover 11 is a part of the housing 1, the first through hole 111 is provided in the upper cover 11. Therefore, the position where the first through hole 111 is located can also be used as the inner cavity of the housing 1. The knob assembly 2 is provided in the first through hole 111, that is, in the inner cavity of the housing 1.

[0040] It should be noted that the positions of the first through hole 111 and the second through hole 122 correspond to each other, but this does not mean that the structures thereof are identical. The specific structures of the first through hole 111 and the second through hole 122 are determined by the structure of the knob assembly 2 .

[0041] In this utility model, refer to Figure 3 and Figure 8 The knob assembly 2 includes a knob 21 and an elastic member 22. The knob 21 can be vertically slidably arranged in the first through hole 111 to switch between the first fixed position and the second fixed position. The knob 21 includes a pressing portion 211 and a transmission portion 212. The transmission portion 212 is fixed at the bottom of the pressing portion 211 and extends downward to be slidable through the second through hole 122 to contact the push assembly 4. The top of the pressing portion 211 does not exceed the top of the housing 1. The elastic member 22 is vertically connected between the pressing portion 211 and the cover plate 121. When the knob 21 is located at the first fixed position, the elastic member 22 is in a natural telescopic state, the knob 21 is set away from the push assembly 4, or the knob 21 does not generate a force on the push assembly 4, so that the push assembly 4 does not generate a force on the contact assembly 3, and the contact assembly 3 is in a disconnected state. When the knob 21 is in the second fixed position, the knob 21 contacts the push assembly 4 and exerts a force on the push assembly 4, so that the push assembly 4 exerts a force on the contact assembly 3, so that the contact assembly 3 is turned on, and at this time, the elastic member 22 is compressed. Once the knob 21 is out of the second fixed position, the elastic force of the elastic member 22 pushes the knob 21 upward to the first fixed position, and the contact assembly 3 returns to the disconnected state.

[0042] See also Figure 5 and Figure 8 The side of the pressing portion 211 is provided with a radially outwardly protruding protrusion 213, and the hole wall of the first through hole 111 is provided with a first slot 112 and a second slot 113 adapted to the protrusion 213, and the first slot 112 is arranged above the second slot 113. The knob 21 can vertically slide to the first slot 112 or the second slot 113 to disconnect or connect the contact assembly 3 through the push assembly 4. At this time, the first slot 112 is the first fixed position, and the second slot 113 is the second fixed position.

[0043] In one embodiment, the first card slot 112 and the second card slot 113 may both only have radially inward openings, that is, the openings of the first card slot 112 and the second card slot 113 are radially toward the knob 21. In this structure, the card protrusion 213 is an elastic structure, and when disengaged from the first card slot 112 and the second card slot 113, the card protrusion 213 is compressed to abut against the hole wall of the first through hole 111. In the initial state, the card protrusion 213 is stuck in the first card slot 112, the elastic member 22 is in a natural telescopic state, the knob 21 is set away from the push assembly 4, or the knob 21 does not generate a force on the push assembly 4, so that the push assembly 4 does not generate a force on the contact assembly 3, and the contact assembly 3 is in a disconnected state. The pressing portion 211 of the knob 21 is pressed downward, and the elastic protrusion 213 is separated from the first slot 112 and moves downward synchronously with the knob 21. At this time, the protrusion 213 abuts against the hole wall of the first through hole 111, until the knob 21 moves downward until the protrusion 213 is locked in the second slot 113, the knob 21 contacts the push assembly 4 and generates a force on the push assembly 4, so that the push assembly 4 generates a force on the contact assembly 3, so that the contact assembly 3 is turned on, and at this time, the elastic member 22 is compressed. When the contact assembly 3 needs to be restored to the disconnected state, the pressing portion 211 of the knob 21 is pressed downward, so that the elastic protrusion 213 is separated from the second slot 113 and moves downward synchronously with the knob 21, the protrusion 213 abuts against the hole wall of the first through hole 111, and the elastic force of the elastic member 22 pushes the knob 21 to move upward until the elastic member 22 restores the natural telescopic state, and the protrusion 213 is locked in the first slot 112.

[0044] In this embodiment, the first slot 112 may be located directly above the second slot 113. However, there is a disadvantage that when the pressing portion 211 of the knob 21 is pressed downward to disconnect the contact assembly 3 with the help of the elastic force of the elastic member 22, since the knob 21 only has an upward and downward displacement, the protrusion 213 is easy to re-enter the second slot 113 with the help of the upward elastic force of the elastic member 22 after being disengaged from the second slot 113 and moving downward, resulting in the contact assembly 3 being unable to be disconnected.

[0045] Therefore, preferably, the first slot 112 is located obliquely above the second slot 113. In the initial state, the protrusion 213 is locked in the first slot 112, the elastic member 22 is in a natural telescopic state, the knob 21 is set away from the push assembly 4, or the knob 21 does not generate a force on the push assembly 4, so that the push assembly 4 does not generate a force on the contact assembly 3, and the contact assembly 3 is in a disconnected state. Press the pressing portion 211 of the knob 21 downward and rotate it by a certain angle, the elastic protrusion 213 disengages from the first slot 112 and moves downward and rotates by a certain angle with the knob 21 synchronously, at which time the protrusion 213 abuts against the hole wall of the first through hole 111, until the knob 21 moves downward until the protrusion 213 is locked in the second slot 113, the knob 21 contacts the push assembly 4 and generates a force on the push assembly 4, so that the push assembly 4 generates a force on the contact assembly 3, so that the contact assembly 3 is turned on, and at this time, the elastic member 22 is compressed. When the contact assembly 3 needs to be restored to the disconnected state, the pressing portion 211 of the knob 21 is pressed downward and rotated in the opposite direction by a certain angle, so that the elastic locking protrusion 213 disengages from the second locking groove 113 and moves downward synchronously with the knob 21 and rotates in the opposite direction by a certain angle, the locking protrusion 213 abuts against the hole wall of the first through hole 111, and the elastic force of the elastic member 22 pushes the knob 21 to move upward until the elastic member 22 restores the natural telescopic state, and the locking protrusion 213 is locked in the first locking groove 112. Under this structure, the locking protrusion 213 can be accurately locked into the corresponding locking groove to ensure the accurate on and off of the contact assembly 3.

[0046] It should be noted that the "certain angle" of rotation of the knob 21 is determined according to the positions of the first slot 112 and the second slot 113. The first through hole 111 is projected onto a horizontal plane. The angle between the line from the center of the first through hole 111 to the center of the first slot 112 and the line from the center of the first through hole 111 to the center of the second slot 113 is the "certain angle" of rotation of the knob 21.

[0047] It is worth noting that the above embodiment requires that the protrusion 213 is an elastic structure, but the protrusion 213 is bent in multiple directions such as up, down, left, and right when it is separated from the first slot 112 and the second slot 113, and is easily damaged. Therefore, in the present utility model, the first slot 112 and the second slot 113 are both provided with openings vertically downward and radially inward, so that the protrusion 213 can slide vertically in the first slot 112 or the second slot 113 and can slide out through the bottom. That is, in addition to the opening radially toward the knob 21, the first slot 112 and the second slot 113 of the present utility model are also provided with a vertical downward opening, so that when the protrusion 213 moves synchronously with the knob 21, the protrusion 213 can be inserted into the first slot 112 and the second slot 113 through the downward opening, which greatly reduces the number of times the protrusion 213 is bent and prolongs the service life of the protrusion 213.

[0048] In addition, if the protrusion 213 is an elastic structure, when the protrusion 213 is locked in the second slot 113, the upward elastic force of the elastic member 22 being compressed may cause the protrusion 213 to be separated from the second slot 113, resulting in unstable conduction of the contact assembly 3. Therefore, the protrusion 213 of the utility model is a non-elastic structure, and an arc-shaped slide rail 114 is provided between the bottom of the first slot 112 and the bottom of the second slot 113. The protrusion 213 of the knob 21 can slide back and forth along the slide rail 114 to switch between the first slot 112 and the second slot 113. Therefore, when the protrusion 213 is separated from the first slot 112 from the downward opening of the first slot 112, it can be locked into the second slot 113 via the slide rail 114, and vice versa. This structure not only facilitates the insertion and separation of the protrusion 213 in the first slot 112 and the second slot 113, but also has a guiding effect on the rotational movement of the protrusion 213.

[0049] Furthermore, two radially symmetrical protrusions 213 are provided, and the number of the first slots 112 and the number of the second slots 113 are equal to the number of protrusions 213, and the positions correspond one to one. Thus, the two symmetrical protrusions 213 can be stably fixed in the first slot 112 or the second slot 113 to ensure the stability of the knob 21 in the first fixed position and the second fixed position, so that the on and off of the contact assembly 3 is not affected.

[0050] On this basis, the pressing portion 211 , the transmission portion 212 and the latching protrusion 213 are connected into an integrated structure, which is not only convenient for production but also makes the structure of the knob 21 more stable.

[0051] The elastic member 22 in the present invention may be a spring, an elastic pad, etc. Figure 3 The projection of the transmission part 212 on the horizontal plane is located within the projection of the pressing part 211 on the horizontal plane, the top end of the elastic member 22 abuts against the bottom of the pressing part 211, and the bottom end of the elastic member 22 abuts against the top of the cover plate 121. The top end of the cover plate 121 extends upward with a limiting plate 123, which is arranged on the outer peripheral side of the second through hole 122 and corresponds to the position of the elastic member 22, and the lower part of the elastic member 22 is arranged in the limiting plate 123. Thus, the elastic member 22 is limited to ensure its vertical movement.

[0052] See also Figure 7 and Figure 8 The push assembly 4 is arranged below the knob assembly 2, and the push assembly 4 includes an armature 41 and a push piece 42. The armature 41 is an L-shaped structure, including a force-bearing portion 411 and a push piece 412. The force-bearing portion 411 is transversely installed below the knob assembly 2, and the bottom of the transmission portion 212 of the knob assembly 2 can contact one end of the top of the force-bearing portion 411. The other end of the force-bearing portion 411 extends downward to form a push piece 412, and the push piece 412 is connected to the push piece 42.

[0053] by Figure 7 In the orientation shown in , the push piece 42 is located at the left side of the push portion 412, a plug-in 413 is provided at the lower end of the push portion 412, the push piece 42 is provided with a slot 421 adapted to the plug-in 413, the slot 421 is provided on the side of the push piece 42 facing the push portion 412, and the plug-in 413 is inserted into the slot 421.

[0054] The contact assembly 3 is arranged on the side of the push member 42 facing away from the push portion 412. Figure 7 In the orientation shown in , the contact assembly 3 is arranged on the left side of the pushing assembly 4. The contact assembly includes a moving spring 31, a first static spring 32 and a second static spring 33. The moving spring 31 is arranged between the first static spring 32 and the second static spring 33. The first static spring 32 is arranged close to the pushing member 42, and the second static spring 33 is arranged away from the pushing member 42. The first static spring 32 is provided with a normally closed contact 321 facing the moving spring 31, and the moving spring 31 is provided with a first moving contact 311 adapted to the normally closed contact 321 facing the first static spring 32. The second static spring 33 is provided with a normally open contact 331 facing the moving spring 31, and the moving spring 31 is provided with a second moving contact 312 adapted to the normally open contact 331 facing the second static spring 33.

[0055] The push piece 42 is provided with an extension portion 422 extending toward the contact assembly 3, and one end of the extension portion 422 away from the pushing portion 412 is narrowed to form a pushing end 423. The first static spring piece 32 is provided with a bypass hole 322 for bypassing the extension portion 422, and the movable spring piece 31 is provided with a through hole 313 for bypassing the pushing end 423. The aperture of the through hole 313 is smaller than the maximum diameter of the extension portion 422. The extension portion 422 of the push piece 42 can pass through the bypass hole 322 so that the pushing end 423 passes through the through hole 313.

[0056] In the initial state, the locking protrusion 213 is locked in the first locking groove 112, the elastic member 22 is in a natural telescopic state, the knob 21 is set away from the pushing assembly 4, or the knob 21 does not generate a force on the pushing assembly 4, so that the pushing assembly 4 does not generate a force on the contact assembly 3, and the contact assembly 3 is in a disconnected state. At this time, the first moving contact 311 is closed with the normally closed contact 321. Press the pressing portion 211 of the knob 21 downward and rotate it at a certain angle, the locking protrusion 213 disengages from the first locking groove 112 and moves downward synchronously with the knob 21 and rotates at a certain angle to slide along the slide rail 114 until the locking protrusion 213 is locked in the second locking groove 113, the knob 21 contacts the pushing assembly 4 and generates a force on the force-bearing portion 411 of the armature 41, and the force-bearing portion 411 moves downward under the force to drive the pushing portion 412 and push the push member 42 to move to the left. The end of the extension portion 422 provided with the push end 423 abuts against the movable spring piece 31 and pushes the movable spring piece 31 to move to the left until the second movable contact 312 is closed with the normally open contact 331, so that the contact assembly 3 is turned on. At this time, the elastic member 22 is compressed. When the contact assembly 3 needs to be restored to the disconnected state, the pressing portion 211 of the knob 21 is pressed downward and rotated in the opposite direction by a certain angle, so that the locking protrusion 213 is disengaged from the second slot 113 and moves downward synchronously with the knob 21 and rotates in the opposite direction by a certain angle. The elastic force of the elastic member 22 pushes the knob 21 to move upward until the elastic member 22 restores the natural telescopic state, and the locking protrusion 213 slides along the slide rail 114 until the locking protrusion 213 is locked in the first slot 112. At this time, the push assembly 4 does not generate a force on the movable spring piece 31, and the movable spring piece 31 rebounds to close the first movable contact 311 and the normally closed contact 321.

[0057] In addition to the above-mentioned manual switch to control the on and off of the contact assembly 3, the relay of the utility model is also provided with an electromagnetic assembly 5. Figure 6 , the electromagnetic assembly 5 is arranged below the force-bearing portion 411 and on the right side of the pushing portion 412. In the energized state, the electromagnetic assembly 5 can attract the force-bearing portion 411 to move downward, so that the pushing portion 412 and the push piece 42 move synchronously to the left, and the end of the extension portion 422 provided with the pushing end 423 abuts against the movable spring piece 31 and pushes the movable spring piece 31 to move to the left until the second movable contact 312 is closed with the normally open contact 331, so that the contact assembly 3 is turned on. After the power is turned off, the pushing assembly 4 does not exert force on the movable spring piece 31, and the movable spring piece 31 rebounds to close the first movable contact 311 with the normally closed contact 321.

[0058] The electromagnetic component 5 is a common component in relays, and reference may be made to the prior art CN114334545A, CN216624110U, etc., which will not be described in detail here.

[0059] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A manually switchable relay, characterized in that: include: A housing (1), a knob assembly (2), a contact assembly (3) and a pushing assembly (4), wherein the contact assembly (3) and the pushing assembly (4) are both arranged in the inner cavity of the housing (1), the knob assembly (2) is arranged at the top of the housing (1) and extends downward to the inner cavity of the housing (1) so as to contact the pushing assembly (4), and the top end of the knob assembly (2) does not exceed the top end of the housing (1); The housing (1) is provided with a first fixing position and a second fixing position for fixing the knob assembly (2), the first fixing position being arranged above the second fixing position, and the knob assembly (2) can be moved and switched to the first fixing position or the second fixing position to disconnect or connect the contact assembly (3) through the pushing assembly (4).

2. The manually switchable relay according to claim 1, characterized in that: The housing (1) comprises an upper cover (11), a middle shell (12) and a base (13) which are connected in sequence from top to bottom; the contact assembly (3) and the pushing assembly (4) are both arranged in the middle shell (12); a cover plate (121) is provided on the top of the middle shell (12); and the cover plate (121) is provided with a second through hole (122) which penetrates vertically; The upper cover (11) is provided with a first through hole (111) which passes through vertically, and the hole wall of the first through hole (111) is provided with the first fixing position and the second fixing position for fixing the knob assembly (2), and the position of the first through hole (111) corresponds to the position of the second through hole (122), and the knob assembly (2) can be vertically slidably arranged in the first through hole (111) to switch between the first fixing position and the second fixing position, and its lower part can vertically slide through the second through hole (122) to contact the pushing assembly (4).

3. The manually switchable relay according to claim 2, characterized in that: The knob assembly (2) comprises a knob (21) and an elastic member (22); the knob (21) is vertically slidably disposed in the first through hole (111) to switch between the first fixed position and the second fixed position; the knob (21) comprises a pressing portion (211) and a transmission portion (212); the transmission portion (212) is fixed at the bottom of the pressing portion (211) and extends downward to be slidable through the second through hole (122) to contact the pushing assembly (4); the top end of the pressing portion (211) does not exceed the top end of the shell (1); and the elastic member (22) is vertically connected between the pressing portion (211) and the cover plate (121).

4. The manually switchable relay according to claim 3, characterized in that: The side of the pressing portion (211) is provided with a radially outwardly protruding locking protrusion (213); the hole wall of the first through hole (111) is provided with a first locking groove (112) and a second locking groove (113) adapted to the locking protrusion (213); the first locking groove (112) is arranged above the second locking groove (113); the knob (21) can vertically slide to the first locking groove (112) or the second locking groove (113) to disconnect or connect the contact assembly (3) through the pushing assembly (4).

5. The manually switchable relay according to claim 4, characterized in that: The locking protrusions (213) are provided with two radially symmetrical ones, and the number of the first locking grooves (112) and the number of the second locking grooves (113) are both equal to the number of the locking protrusions (213), and the positions correspond one to one.

6. The manually switchable relay according to claim 4, characterized in that: The first card slot (112) and the second card slot (113) are both provided with openings extending vertically downward and radially inward, so that the card protrusion (213) can slide vertically in the first card slot (112) or the second card slot (113) and can slide out through the bottom. The first card slot (112) is arranged obliquely above the second card slot (113).

7. The manually switchable relay according to claim 6, characterized in that: An arc-shaped slide rail (114) is provided between the bottom of the first slot (112) and the bottom of the second slot (113), and the locking protrusion (213) of the knob (21) can slide back and forth along the slide rail (114) to switch between the first slot (112) and the second slot (113).

8. The manually switchable relay according to claim 3, characterized in that: A limiting plate (123) extends upward from the top end of the cover plate (121); the limiting plate (123) is arranged on the outer peripheral side of the second through hole (122) and corresponds to the position of the elastic member (22); the lower part of the elastic member (22) is arranged inside the limiting plate (123).

9. The manually switchable relay according to claim 4, characterized in that: The pressing portion (211), the transmission portion (212) and the latching protrusion (213) are connected to form an integrated structure.

10. The manually switchable relay according to claim 3, characterized in that: The projection of the transmission part (212) on the horizontal plane is located within the projection of the pressing part (211) on the horizontal plane, the top end of the elastic member (22) abuts against the bottom of the pressing part (211), and the bottom end of the elastic member (22) abuts against the top of the cover plate (121).

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