Adjustable temperature protector structure and method of use

Abstract

This invention relates to the field of temperature protector technology, and more particularly to an adjustable temperature protector structure and its usage method. The structure includes: an outer base with a locking interface; a switching outer shell rotatably connected to the outer base; a first limiting groove, a second limiting groove, and a transition groove within the switching outer shell; an inner base mounted on the locking interface; a first conductor fixed to the inner base; a slider sliding on the first conductor; a limiting protrusion on the side of the slider; an inclined surface on the side of the slider facing the inner base; a second conductor fixed to the inner base; a moving contact piece attached to and fixed to the inner base; and a deformation piece disposed between the first conductor and the moving contact piece. When the slider is closest to the inner base, the inclined surface aligns with the center of the deformation piece; when the slider is furthest from the inner base, the inclined surface aligns with the side of the deformation piece furthest from the inner base. This invention enables free adjustment of the temperature protector's operating mode, improves circuit switching efficiency, and avoids circuit damage.

Description

Technical Field

[0001] This invention relates to the field of temperature protector technology, and in particular to an adjustable temperature protector structure and its usage method. Background Technology

[0002] A temperature protector is a circuit protection switch that instantly flips its internal bimetallic strip when the temperature rises abnormally to a set value, breaking the circuit and preventing overheating damage. It is small in size, reliable in operation, and a key safety component preventing electrical equipment from catching fire or burning due to overload or stall.

[0003] In the use of some electrical equipment, different operating modes of temperature protectors are required. The two most common are: automatic reset (i.e., after the temperature protector disconnects, it automatically reconnects the circuit as the temperature decreases) and hold-off (i.e., after the temperature protector disconnects, it remains disconnected even if the temperature decreases, and must be manually reconnected). In some circuits, switching between these two operating modes is required. The existing method can only achieve this by replacing the temperature protector, which requires resoldering the circuit, is inefficient, and can easily damage the original circuit. Summary of the Invention

[0004] This invention provides an adjustable temperature protector structure and its usage method, which can effectively solve the problems in the background art.

[0005] The present invention provides an adjustable temperature protector structure, comprising: The outer base is equipped with a card slot; The switching housing is rotatably connected to the outer base, and the card interface extends into the switching housing; the switching housing is provided with a first limiting groove and a second limiting groove; the first limiting groove and the second limiting groove are connected by a transition groove; The inner base is located on the card interface; The first conductor is fixed on the inner base, with a stationary contact at one end and the other end extending through the outer base to the outside. The slider slides on the first conductor towards and away from the inner base; a limit protrusion is provided on the side of the slider; an inclined surface is provided on the side of the slider facing the inner base; The second conductor is fixed on the inner base, with one end extending through the outer base to the outside; the first conductor and the second conductor do not contact each other. The movable contact piece has one end attached to and fixed to the inner base with the second conductor; the other end is provided with a movable contact. A deformation sheet is disposed between the first conductor and the moving contact sheet; the edge of the deformation sheet bends downward when the temperature is below the critical temperature, and bends upward when the temperature reaches or exceeds the critical temperature. When the slider moves to the closest point to the inner base, the inclined plane is aligned with the center of the deformed sheet; when the slider moves to the furthest point from the inner base, the inclined plane is aligned with the side of the deformed sheet furthest from the inner base.

[0006] Furthermore, the card interface is provided with at least one first planar structure, and the inner base is provided with the same number of second planar structures as the first planar structures, and the first planar structures and the second planar structures are fitted together one by one.

[0007] Furthermore, the outer base and the inner base are respectively provided with a first anti-detachment protrusion and a second anti-detachment protrusion; the outer casing is provided with a first anti-detachment groove and a second anti-detachment groove in a ring direction, the first anti-detachment protrusion extends into the first anti-detachment groove, and the second anti-detachment protrusion extends into the second anti-detachment groove.

[0008] Furthermore, a sealing ring is provided on the outer base, and the sealing ring is closer to the outer side of the switching housing than the first anti-detachment protrusion.

[0009] Furthermore, a positioning protrusion is provided on the outer base; a positioning ring is provided inside the switching shell, and multiple positioning grooves are provided in the circumferential direction of the positioning ring, with the positioning protrusion extending into the positioning groove.

[0010] Furthermore, the movable contact piece is provided with a downwardly protruding reinforcing protrusion, which is aligned with the side of the deformable piece away from the inner base.

[0011] Furthermore, a sliding groove is provided on the side and / or center of the first conductor, and the slider is provided with an extension that extends into the sliding groove.

[0012] Furthermore, an anti-detachment block is provided at the end of the extension section away from the slider, and the width of the anti-detachment block is greater than the width of the sliding groove.

[0013] Furthermore, polygonal segments are provided on the outer base and the outer side of the switching housing.

[0014] The present invention also provides a method of using an adjustable temperature protector structure, which is used in the adjustable temperature protector structure as described above. By rotating the switching housing, a relative rotation is generated between the switching housing and the outer base, thereby allowing the adjustable temperature protector structure to switch between two states: automatic recovery and maintaining disconnection. When switching to automatic recovery mode, rotate the switching shell to allow the limiting protrusion to enter the first limiting groove. At this time, the slider will be restricted by the first limiting groove and will remain at the position closest to the inner base and will not be able to move. When switching to the hold-off mode, rotate the switching housing to allow the limiting protrusion to enter the second limiting groove. At this time, the slider can slide freely on the first conductor. After the adjustable temperature protector structure is disconnected due to temperature rise, switch to the automatic recovery mode and then switch back to the hold-off mode to reconnect.

[0015] The technical solution of this invention can achieve the following technical effects: This structure allows the temperature protector to quickly switch between two operating modes—automatic recovery after disconnection and continuous disconnection—by rotating the outer casing. This eliminates the need to disrupt the original circuit structure when the temperature protector needs to change its operating mode, thus preventing damage to the original circuit and effectively improving switching efficiency while reducing costs. Furthermore, the temperature protector's basic overheat protection function remains operational after or during mode switching, ensuring circuit safety. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the adjustable temperature protector. Figure 2 This is a schematic diagram of the adjustable temperature protector structure after the outer casing has been cut open during switching. Figure 3 This is a schematic diagram of the adjustable temperature protector structure after removing the switching housing; Figure 4 This is a disassembled view of the adjustable temperature protector structure after removing the switching housing; Figure 5 This is a schematic diagram of the structure of the first conductor and the slider; Figure 6 This is a schematic diagram of the structure after the outer shell has been cut open. Figure 7 This is a first-view cross-sectional view of the adjustable temperature protector structure after removing the switching housing. Figure 8 A second-view sectional view of the adjustable temperature protector structure; Figure 9 for Figure 7 A magnified view of point A under normal temperature conditions in automatic recovery mode; Figure 10 for Figure 8 A magnified view of B in auto-recovery mode; Figure 11 for Figure 7 Enlarged view of point A when the temperature is too high while in disconnected mode; Figure 12 for Figure 7 Enlarged view of point A when the temperature becomes too high in the disconnected mode and then returns to normal; Figure 13 for Figure 8 Enlarged view of section B under normal temperature conditions in disconnected mode; Figure 14 for Figure 8 Enlarged view of point B after the temperature became too high in the disconnected mode.

[0018] Reference numerals: 1. Outer base; 11. Card interface; 12. First anti-detachment protrusion; 13. Sealing ring; 14. Positioning protrusion; 2. Switching shell; 21. First limiting groove; 22. Second limiting groove; 23. Transition groove; 24. First anti-detachment groove; 25. Second anti-detachment groove; 26. Positioning ring; 3. Inner base; 31. Second anti-detachment protrusion; 4. First conductor; 41. Stationary contact; 42. Sliding groove; 5. Slider; 51. Limiting protrusion; 52. Inclined surface; 6. Second conductor; 7. Moving contact piece; 71. Moving contact; 72. Reinforcing protrusion; 8. Deformation piece. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] This invention relates to an adjustable temperature protector structure, such as... Figures 1-8 As shown, the specific structure of each component is as follows: The outer base 1 is provided with a card interface 11; its interior is also provided with a through hole connecting the outside to the card interface 11. After all other components of the temperature protector are installed, sealing glue will be added to the through hole to seal it. The switching housing 2 is rotatably connected to the outer base 1, and the locking interface 11 extends into the switching housing 2; the switching housing 2 is provided with a first limiting groove 21 and a second limiting groove 22, such as... Figure 6 As shown, the width of the first limiting groove 21 along the axis is smaller, and the width of the second limiting groove 22 along the axis is larger. The side of the second limiting groove 22 near the card interface 11 is aligned with the first limiting groove 21. The first limiting groove 21 and the second limiting groove 22 are connected by a transition groove 23. The side of the transition groove 23 is inclined. The outer base 1 and the switching housing 2 are combined to form the basic insulating housing of this temperature protector, and the remaining components are installed in the outer base 1 and the switching housing 2.

[0022] The remaining components (inner base 3, slider 5, first conductor 4, second conductor 6, moving contact 7, and deformation plate 8) constitute the main operating function of the temperature protector. The specific structure of each component is as follows: The inner base 3, made of insulating material, is used to fix the first conductor 4, the second conductor 6, the moving contact 7 and the deformation piece 8, ensuring the positional relationship between the various components. After the components are fixed, the inner base 3 will be installed on the card interface 11 to complete the assembly of the action function part and the basic insulating shell.

[0023] The first conductor 4 is fixed on the inner base 3. One end of the first conductor 4 is provided with a stationary contact 41, and the other end extends outward through the through hole in the center of the outer base 1. The part extending outward can be a sheet structure or connected to an outward wire for connection to an external circuit.

[0024] The second conductor 6 is fixed on the inner base 3. One end of the second conductor 6 extends outward through the through hole in the center of the outer base 1. The portion extending outward can be a sheet structure or connected to an outward-extending wire for connection to an external circuit. The inner base 3 is provided with a corresponding blocking structure to separate the first conductor 4 from the second conductor 6, preventing them from contacting each other.

[0025] The slider 5 slides on the first conductor 4, moving closer to and away from the inner base 3; the side of the slider 5 is provided with a limiting protrusion 51 that extends into the first limiting groove 21 or the second limiting groove 22; the side of the slider 5 facing the inner base 3 is provided with an inclined surface 52.

[0026] The moving contact 7 has one end attached to the second conductor 6 and fixed to the inner base 3; the other end is provided with a moving contact 71 corresponding to the stationary contact 41.

[0027] Deformation sheet 8 is disposed between the first conductor 4 and the moving contact sheet 7. Deformation sheet 8 is a structure formed by bonding two metal sheets with different coefficients of thermal expansion. It can bend its edges downward when the temperature is below the critical temperature and bend its edges upward when the temperature reaches or exceeds the critical temperature. The specific principle and structure of deformation sheet 8 are existing technologies and will not be described in detail here.

[0028] The sliding range of slider 5 needs to be set according to the position of deformable piece 8: when slider 5 moves to the closest to inner base 3, inclined surface 52 is aligned with the center of deformable piece 8; when slider 5 moves to the furthest from inner base 3, inclined surface 52 is aligned with the side of deformable piece 8 away from inner base 3.

[0029] Based on the above-described adjustable temperature protector structure, this invention also relates to a method of using the adjustable temperature protector structure. By rotating the switching housing 2, a relative rotation occurs between the switching housing 2 and the outer base 1, thereby switching the adjustable temperature protector structure between two states: automatic recovery and sustained disconnection. The specific usage process and principle of each state are explained below: When the temperature protector switches to automatic recovery mode: rotate the switching housing 2 to allow the limiting protrusion 51 to enter the first limiting groove 21, as shown. Figure 10 As shown, the width of the first limiting groove 21 along the axis is relatively small. At this time, the slider 5 can only stay at the position closest to the inner base 3 and cannot move under the restriction of the first limiting groove 21.

[0030] Under normal temperature conditions, deformable sheet 8 exhibits the following characteristics: Figure 9 When the edge of the deformable piece 8 bends to the left, the slider 5 is located at the center of the relatively concave part of the deformable piece 8. The edge of the deformable piece 8 will then move away from the moving contact 7. At this time, the moving contact 71 of the moving contact 7 and the stationary contact 41 of the first conductor 4 are in contact, allowing current to flow through the path of the first conductor 4-moving contact 7-second conductor 6, meaning the temperature protector is in a connected state. However, when the temperature exceeds the threshold, the bending direction of the edge of the deformable piece 8 will change. The middle of the deformable piece 8 will press against the slider 5, and the edge of the deformable piece 8 will bend towards... Figure 9 The right side bends and pushes against the moving contact 7, causing the moving contact 71 and the stationary contact 41 to separate, thus achieving the disconnection action of the temperature protector. When the temperature returns to normal, the deformable sheet 8 will return to its original shape. Figure 9 The state shown allows the temperature protector to automatically restore the circuit connection.

[0031] When the temperature protector switches to the hold-off mode: rotate the switching housing 2 to allow the limiting protrusion 51 to enter the second limiting groove 22, as shown. Figures 13-14 As shown, since the width of the second limiting groove 22 along the axis is relatively large, the slider 5 can slide freely on the first conductor 4.

[0032] Under normal temperature conditions, as mentioned above... Figure 9 The situation is the same as shown. At this time, the slider 5 is located at the center of the relatively concave part of the deformable piece 8. The slider 5 will not affect the position of the deformable piece 8, and the deformable piece 8 can also limit the slider 5.

[0033] When the temperature exceeds the threshold, the bending direction of the edge of the deformation piece 8 will change, the middle of the deformation piece 8 will press against the slider 5, and the edge of the deformation piece 8 will bend towards... Figure 9The right side bends and pushes against and pushes the moving contact 7. At this time, the middle of the deformable piece 8 abuts against the inclined surface 52 of the slider 5. Not only will the edge of the deformable piece 8 push the moving contact 7 to move, causing the moving contact 71 and the stationary contact 41 to separate, thus realizing the disconnection action of the temperature protector, but the middle of the deformable piece 8 will also push the slider 5 to move, causing the slider 5 to move to the position furthest away from the inner base 3. Figure 11 As shown.

[0034] When the temperature returned to normal, the edge of the deformable sheet 8 turned towards... Figure 11 The left side bends, but at this point, since slider 5 is already at its furthest point from the inner base 3, the edge of deformable piece 8 will abut against the inclined surface 52 of slider 5, as... Figure 12 As shown, the edge of the deformable piece 8 will continue to exert a pushing force on the slider 5 in a direction away from the inner base 3, preventing the slider 5 from resetting. At this time, due to the obstruction of the slider 5 itself, or because the deformable piece 8 cannot reset to the left, its center presses against the moving contact piece 7 and forms a pushing force to the right, these can prevent the moving contact 71 of the moving contact piece 7 and the stationary contact 41 of the first conductor 4 from re-contacting each other, and even if the temperature rises again, such as Figure 11 As shown, slider 5 still cannot be reset, thus preventing the temperature protector from remaining in the off state after being disconnected once.

[0035] To return the temperature protector to the ON state, the switching housing 2 needs to be rotated to switch the temperature protector to automatic recovery mode. During the rotation of the switching housing 2, the side of the transition groove 23 will forcefully push the slider 5 to reset, causing the slider 5 to return to its original position. Figure 9 The deformable piece 8 is positioned at the center of the recess, and then switching back to the hold-off mode will reconnect it.

[0036] Preferably, at least one first planar structure is provided in the card interface 11, and the inner base 3 is provided with the same number of second planar structures as the first planar structures. The first planar structures and the second planar structures are fitted together. Through this fitting of the planar structures, the inner base 3 and the outer base 1 are fixed in the circumferential direction, so as to prevent the main operating function of the thermal protector from rotating along with the switching housing 2, which would cause the switching function to fail.

[0037] Preferably, a first anti-detachment protrusion 12 and a second anti-detachment protrusion 31 are respectively provided on the sides of the outer base 1 and the inner base 3. A first anti-detachment groove 24 and a second anti-detachment groove 25 are provided in the inner casing 2. The first anti-detachment protrusion 12 extends into the first anti-detachment groove 24 and the second anti-detachment protrusion 31 extends into the second anti-detachment groove 25, thereby fixing the outer base 1 and the inner base 3 in the relative position in the axial direction and preventing the switching casing 2 from falling off.

[0038] Preferably, a sealing ring 13 is provided on the outer base 1 to seal the connection between the outer base 1 and the switching housing 2, thereby improving the waterproof function of the temperature protector. Furthermore, the sealing ring 13 is closer to the outer side of the switching housing 2 than the first anti-detachment protrusion 12. This ensures that during installation, the second anti-detachment protrusion 31 and the first anti-detachment protrusion 12 will enter the switching housing 2 first and engage, with the sealing ring 13 entering last, thus reducing pressure and wear on the sealing ring 13. A stepped surface can be provided on the switching housing 2 corresponding to the sealing ring 13, making the inner wall diameter of the sealing ring 13 larger than other locations. This also reduces friction from other components during installation, ensuring a tight seal between the inner wall and the sealing ring 13.

[0039] Preferably, positioning protrusions 14 are provided on the outer base 1, and positioning rings 26 are provided inside the switching housing 2. Multiple positioning grooves are arranged circumferentially on the positioning ring 26. The number of positioning protrusions 14 is less than the number of positioning grooves. The positioning protrusions 14 extend into the positioning grooves, thereby restricting the rotation of the switching housing 2 and preventing it from easily rotating again after reaching the corresponding position, ensuring accuracy during mode switching. While the above restriction can be easily overcome by the user rotating the switching housing 2, there will be a clear sense of sticking during rotation, helping the user to determine whether the switching housing 2 has rotated to the correct position. Chamfered surfaces are provided on both sides of the positioning grooves to facilitate the sliding of the positioning protrusions 14 out of and into the positioning grooves.

[0040] Preferably, a downward protruding reinforcing protrusion 72 is provided on the moving contact 7. The reinforcing protrusion 72 is aligned with the side of the deformable sheet 8 away from the inner base 3. When the deformable sheet 8 is folded, the edge will abut against the reinforcing protrusion 72, thereby increasing the pushing distance of the deformable sheet 8 on the moving contact 7. This further ensures that the moving contact 71 and the stationary contact 41 can be separated sensitively, thus ensuring the protection effect of the temperature protector.

[0041] Preferably, a sliding groove 42 is provided on the side and / or center of the first conductor 4. The slider 5 has an extension that extends into the sliding groove 42. The movement distance of the slider 5 is limited by the cooperation between the extension and the sliding groove 42, and it is ensured that the slider 5 will not rotate during sliding, thus affecting the function of the temperature protector. Preferably, an anti-detachment block is provided at the end of the extension away from the slider 5. The width of the anti-detachment block is greater than the width of the sliding groove 42, thereby limiting the slider 5 in the thickness direction and ensuring that the slider 5 will not fall off. One part of the sliding groove 42 can extend to the side of the first conductor 4 to facilitate the installation of the extension of the slider 5.

[0042] Preferably, polygonal segments are provided on the outer sides of both the outer base 1 and the switching housing 2. The polygonal segments of the outer base 1 and the switching housing 2 are the same size. This allows the user to determine whether the switching housing 2 has rotated into position by checking whether the polygonal segments of the outer base 1 and the switching housing 2 are aligned when the temperature protector switches modes. Marks are set on multiple faces of the polygonal segments, allowing the user to determine the temperature protector mode.

[0043] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of the application as defined herein, and are to be considered as covering any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from its scope. Thus, if such modifications and modifications fall within the scope of this application and its equivalents, this application intends to include such modifications and modifications.

Claims

1. An adjustable temperature protector structure, characterized in that, include: The outer base (1) is provided with a card interface (11); The switching housing (2) is rotatably connected to the outer base (1), and the card interface (11) extends into the switching housing (2); the switching housing (2) is provided with a first limiting groove (21) and a second limiting groove (22); the first limiting groove (21) and the second limiting groove (22) are connected by a transition groove (23); The inner base (3) is disposed on the card interface (11); The first conductor (4) is fixed on the inner base (3), with a stationary contact (41) at one end and the other end extending outward through the outer base (1); The slider (5) slides on the first conductor (4) towards and away from the inner base (3); the slider (5) has a limiting protrusion (51) on its side; the slider (5) has an inclined surface (52) on the side facing the inner base (3); The second conductor (6) is fixed on the inner base (3), with one end extending outward through the outer base (1); the first conductor (4) and the second conductor (6) do not contact each other; The movable contact piece (7) is attached to and fixed to the inner base (3) at one end; and a movable contact (71) is provided at the other end. A deformable sheet (8) is disposed between the first conductor (4) and the movable contact sheet (7); the deformable sheet (8) bends downward at the edge when the temperature is below the critical temperature and bends upward at the edge when the temperature reaches or exceeds the critical temperature. When the slider (5) moves to the closest position to the inner base (3), the inclined surface (52) is aligned with the center of the deformable piece (8); when the slider (5) moves to the furthest position from the inner base (3), the inclined surface (52) is aligned with the side of the deformable piece (8) away from the inner base (3).

2. The adjustable temperature protector structure according to claim 1, characterized in that, The card interface (11) is provided with at least one first planar structure, and the inner base (3) is provided with the same number of second planar structures as the first planar structures, and the first planar structures and the second planar structures are fitted together one by one.

3. The adjustable temperature protector structure according to claim 1, characterized in that, The outer base (1) and the inner base (3) are respectively provided with a first anti-detachment protrusion (12) and a second anti-detachment protrusion (31); the switching shell (2) is provided with a circumferential first anti-detachment groove (24) and a second anti-detachment groove (25), the first anti-detachment protrusion (12) extends into the first anti-detachment groove (24), and the second anti-detachment protrusion (31) extends into the second anti-detachment groove (25).

4. The adjustable temperature protector structure according to claim 3, characterized in that, A sealing ring (13) is provided on the outer base (1), and the sealing ring (13) is closer to the outside of the switching shell (2) than the first anti-detachment protrusion (12).

5. The adjustable temperature protector structure according to claim 1, characterized in that, The outer base (1) is provided with a positioning protrusion (14); the switching shell (2) is provided with a positioning ring (26), the positioning ring (26) is provided with multiple positioning grooves in the circumferential direction, and the positioning protrusion (14) extends into the positioning groove.

6. The adjustable temperature protector structure according to claim 1, characterized in that, The movable contact piece (7) is provided with a downwardly protruding reinforcing protrusion (72), which is aligned with the side of the deformable piece (8) away from the inner base (3).

7. The adjustable temperature protector structure according to claim 1, characterized in that, A sliding groove (42) is provided on the side and / or center of the first conductor (4), and the slider (5) is provided with an extension that extends into the sliding groove (42).

8. The adjustable temperature protector structure according to claim 7, characterized in that, An anti-detachment block is provided at the end of the extension section away from the slider (5), and the width of the anti-detachment block is greater than the width of the sliding groove (42).

9. The adjustable temperature protector structure according to claim 1, characterized in that, Both the outer base (1) and the switching shell (2) have polygonal segments on their outer sides.

10. A method of using an adjustable temperature protector structure, for use in the adjustable temperature protector structure as described in any one of claims 1 to 9, characterized in that, Rotate the switching housing (2) to generate relative rotation between the switching housing (2) and the outer base (1), thereby switching the adjustable temperature protector structure between the two states of automatic recovery and holding off. When switching to automatic recovery mode, rotate the switching housing (2) so that the limiting protrusion (51) enters the first limiting groove (21). At this time, the slider (5) is restricted by the first limiting groove (21) and stays at the position closest to the inner base (3) and cannot move. When switching to the hold-off mode, rotate the switching housing (2) so that the limiting protrusion (51) enters the second limiting groove (22). At this time, the slider (5) can slide freely on the first conductor (4). After the adjustable temperature protector structure is disconnected due to heating, switch to the automatic recovery mode and then switch back to the hold-off mode to reconnect.

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