CN211287050U - Knob type counter locking mechanism and electronic lock - Google Patents

Abstract

The utility model discloses a knob formula counter-lock mechanism and electronic lock, knob formula counter-lock mechanism includes: the back locking knob is rotatably arranged in a back locking operation area outside the lock body; the anti-locking knob block is positioned inside the lock body and connected with the anti-locking knob; the peripheral surface of the back locking knob block is provided with a back locking positioning part, an unlocking positioning part and a triggering part; the contact switch is arranged at the side position of the back locking knob block; in the back locking state, the back locking knob block is positioned at the back locking position by the positioning mechanism through the back locking positioning part, and the contact switch is triggered by the trigger part; in an unlocking state, the reverse locking knob block is positioned at an unlocking position by the positioning mechanism through the unlocking positioning part, and the trigger part does not trigger the contact switch. The counter lock mechanism realizes quick counter lock and unlocking of the lock body by utilizing the matching between the counter lock knob and the contact switch, not only simplifies the structure of the lock body, but also improves the safety and the reliability.

Description

Knob type counter locking mechanism and electronic lock

Technical Field

The utility model belongs to the technical field of the electronic lock technique and specifically relates to anti-locking mechanism of electronic lock. The utility model discloses still relate to and be equipped with the electronic lock of anti-locking mechanism.

Background

The electronic door lock body is usually configured with a back locking mechanism, which includes a mechanical back locking mechanism and an electronic back locking mechanism. Indoor personnel can use the mechanism of locking in the door of locking in the contrary to prevent that outdoor personnel from opening the door through prizing the lock or other means by force, improve the security and the reliability of lock.

The back locking mechanism is generally provided with two actions including back locking and unlocking, and accordingly, in order to realize the two actions and ensure the stability of the back locking mechanism, the back locking mechanism is often required to be designed with a complex mechanical structure or an electronic circuit.

The reverse lock bolt stroke device of the electronic lock, as disclosed in CN202324874U, comprises a reverse lock bolt and a sensing switch, the sensing switch downside is provided with a buffer plate, and further comprises a travel switch, the travel switch comprises a pressure spring plate and a torsion spring, one end of the pressure spring plate is connected with the reverse lock bolt in a contact manner, the torsion spring is clamped in the pressure spring plate, one end of the torsion spring is penetrated through the pressure spring plate and is abutted against the buffer plate, and the other end of the torsion spring is connected with the electronic lock body.

The device is through set up a travel switch between anti-lock tongue and inductive switch, and the signal transmission that locks or unblank the anti-lock tongue through travel switch gives inductive switch, can avoid anti-lock tongue and inductive switch's direct contact, can strengthen electronic door lock's anti destructive power, effectively improves electronic door lock's life.

However, the mechanical structure and the electronic components are complex, so that the lock body is heavy and high in cost, and the application of the lock body is not facilitated.

Therefore, it is important to develop a simple, stable and reliable back-locking mechanism.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a knob formula locking mechanism. The counter lock mechanism realizes quick counter lock and unlocking of the lock body by utilizing the matching between the counter lock knob and the contact switch, not only simplifies the structure of the lock body, but also improves the safety and the reliability.

Another object of the present invention is to provide an electronic lock with the knob type back locking mechanism.

In order to achieve the above object, the present invention provides a knob type reverse locking mechanism, including:

the back locking knob is rotatably arranged in a back locking operation area outside the lock body;

the anti-locking knob block is positioned in the lock body and connected with the anti-locking knob so as to be driven by the anti-locking knob to rotate; the peripheral surface of the back locking knob block is provided with a back locking positioning part, an unlocking positioning part and a triggering part;

the contact switch is arranged at the side position of the back locking knob block; in the back locking state, the back locking knob block is positioned at the back locking position by the positioning mechanism through the back locking positioning part, and the contact switch is triggered by the trigger part; in an unlocking state, the reverse locking knob block is positioned at an unlocking position by the positioning mechanism through the unlocking positioning part, and the trigger part does not trigger the contact switch.

Preferably, the back locking positioning portion includes a back locking surface formed on an outer peripheral surface of the back locking knob block, the unlocking positioning portion includes an unlocking surface formed on an outer peripheral surface of the back locking knob block, and the trigger portion includes a contact surface formed on an outer peripheral surface of the back locking knob block.

Preferably, the anti-locking surface and the unlocking surface are lateral planes on the outer peripheral surface of the anti-locking knob block, and the contact surface is an arc surface which is radially raised on the outer peripheral surface of the anti-locking knob block; the distance between the highest point of the contact surface and the rotation center of the anti-locking knob block is larger than the distance between the anti-locking surface and the rotation center of the anti-locking knob block.

Preferably, an included angle between a plane where the anti-locking surface is located and a plane where the unlocking surface is located is 90 °.

Preferably, the peripheral surface of the anti-locking knob block is provided with a non-positioning surface located in a 90-degree included angle area between the anti-locking surface and the unlocking surface, the non-positioning surface is a radially raised arc surface, and the distance between the highest point of the non-positioning surface and the rotation center of the anti-locking knob block is greater than the distance between the anti-locking surface and the rotation center of the anti-locking knob block and the distance between the unlocking surface and the rotation center of the anti-locking knob block.

Preferably, the positioning mechanism includes an elastic member for making surface contact with the back lock positioning portion in the back lock state, making surface contact with the unlock positioning portion in the unlock state, and applying an elastic force to the back lock knob block.

Preferably, the elastic component comprises a spring plate with one end or two ends connected with the lock body, the reverse locking positioning part of the reverse locking knob block is attached to the straight surface part of the spring plate in a reverse locking state, and the unlocking positioning part of the reverse locking knob block is attached to the straight surface part of the spring plate in an unlocking state.

Preferably, the spring plate is provided with cambered surface parts positioned at two ends of the straight surface part, an arc right-angle clamping groove is formed in the inner surface of the lock body, and the cambered surface part of the spring plate is arranged in the arc right-angle clamping groove and is fixed through a fastening piece.

Preferably, the fastener comprises a screw and a gasket, a screw hole is formed in a right-angle area on the inner side of the arc right-angle clamping groove, and the screw presses the arc surface part of the elastic sheet through the gasket in a direction parallel to the arc surface.

Preferably, the anti-lock device further comprises a control circuit board electrically connected with the anti-lock device to control the operation of the anti-lock device, and the signal output end of the contact switch is electrically connected with the signal input end of the control circuit board.

In order to achieve the above another object, the present invention provides an electronic lock, including a lock body, a locking mechanism disposed on the lock body, and a back-locking mechanism for performing back-locking, wherein the back-locking mechanism is any one of the above-mentioned knob type back-locking mechanisms.

The utility model discloses the utilization is connected in the quick back lock or the unblock operation of the back lock knob piece of back lock knob and contact switch's cooperation realization electronic lock. When the door needs to be locked reversely in the door, the reverse locking knob block can be positioned by the positioning mechanism only by rotating the reverse locking knob to a reverse locking position, and the contact of the contact switch is pushed to a triggering state through the triggering part, so that the door lock is locked by the control circuit board according to the state of the contact switch; on the contrary, when the reverse locking knob is rotated to the unlocking position, the reverse locking knob block can be positioned again by the positioning mechanism, the trigger part of the reverse locking knob block is not contacted with the contact of the contact switch, the contact switch is in an un-triggered state, and the reverse locking state is released by the control circuit board according to the state of the contact switch. Because the number of the parts forming the back locking mechanism is less, and the structural design of each part is simpler and more reasonable, the whole back locking mechanism has the advantages of simple structure, small occupied space, convenient operation and the like, and the back locking mechanism has high safety and reliability and can be directly suitable for electronic locks of various types.

The utility model provides an electronic lock is equipped with above-mentioned knob formula counter lock mechanism, because knob formula counter lock mechanism has above-mentioned technological effect, then is equipped with the electronic lock of this knob formula counter lock mechanism and also should have corresponding technological effect.

Drawings

Fig. 1 is an exploded schematic view of a knob type back locking mechanism according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of the anti-lock knob block shown in FIG. 1;

FIG. 3 is a schematic structural view of the resilient plate shown in FIG. 1;

FIG. 4 is a schematic structural view of an arc right-angle slot formed on the inner surface of the middle frame of the lock body;

FIG. 5 is a schematic view of the position of the anti-lock knob of the knob type anti-lock mechanism of FIG. 1 in an anti-lock state;

FIG. 6 is a schematic view of the knob lock tumbler of FIG. 1 in a locked state with the contact switch being triggered by the locking knob block through the contact interface;

FIG. 7 is a schematic view of the position of the anti-lock knob of the knob type anti-lock mechanism of FIG. 1 in an unlocked state;

FIG. 8 is a schematic view of the knob lock tumbler mechanism of FIG. 1 in an unlocked state with the contact surface of the lock tumbler not touching the contact switch;

fig. 9 is a schematic structural view of a second anti-lock knob block disclosed in the embodiment of the present invention;

fig. 10 is a schematic structural view of a third anti-lock knob block disclosed in the embodiment of the present invention;

fig. 11 is a schematic structural view of a fourth anti-lock knob block disclosed in the embodiment of the present invention;

fig. 12 is a schematic structural view of a fifth counter lock knob block disclosed in the embodiment of the present invention;

fig. 13 is a schematic structural diagram of a second positioning mechanism disclosed in the embodiment of the present invention;

fig. 14 is a schematic structural diagram of a third positioning mechanism disclosed in the embodiment of the present invention.

In the figure:

1. the anti-locking knob 2, the middle frame 3, the control circuit board 4, the contact switches 5, the 5', the spring plate 6, the anti-locking knob block 7, the screw 8, the washer 9, the spring 10, the positioning plate 11, the anti-locking knob column 21, the knob column through hole 22, the arc right-angle clamping groove 41, the contact 51, the long straight surface 52, the arc surface 61, the anti-locking surface 62, the unlocking surface 63, the contact surface 64, the through hole 65 and the non-positioning surface

Detailed Description

In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description.

In this specification, terms such as "upper, lower, front, and rear" are established based on positional relationships shown in the drawings, and the corresponding positional relationships may vary depending on the drawings, and therefore, the terms are not to be construed as absolutely limiting the scope of protection; moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.

Referring to fig. 1 to 4, fig. 1 is an exploded schematic view of a knob type back locking mechanism according to an embodiment of the present invention; FIG. 2 is a schematic structural view of the anti-lock knob block shown in FIG. 1; FIG. 3 is a schematic structural view of the resilient plate shown in FIG. 1; fig. 4 is a schematic structural view of the lock body middle frame with an arc right-angle clamping groove formed on the inner surface.

As shown in the figure, in one embodiment, the provided knob type back locking mechanism mainly comprises a back locking knob 1, a middle frame 2 of a lock body, a control circuit board 3, a contact switch 4, a spring plate 5, a back locking knob block 6, a screw 7 and other parts.

The anti-locking knob 1 is provided with an anti-locking knob column 11, a knob column through hole 21 is formed in the middle frame 2, the anti-locking knob 1 is rotatably installed in an anti-locking operation area outside the middle frame 2 through the anti-locking knob column 11, generally the lower portion of an indoor operation panel of an electronic lock body, and anti-locking/unlocking prompt information is arranged on the outer surface of the anti-locking operation area of the middle frame 2 in a fixed or electronic graph mode.

The anti-locking knob block 6 is positioned inside the middle frame 2, the anti-locking knob column 11 on the anti-locking knob 1 penetrates through the knob column through hole 21 on the middle frame 2, and is inserted into the through hole 64 of the anti-locking knob block 6 to be fixedly connected with the anti-locking knob block 6, and the fixing mode can be that a bolt and a gasket are adopted for locking. The reverse locking knob 1 can rotate back and forth at the reverse locking position and the unlocking position under the action of external force, so as to drive the reverse locking knob block 6 to rotate, and the reverse locking knob block 6 can be positioned at the reverse locking position or the unlocking position through the positioning mechanism.

The contact switch 4 is installed inside the middle frame 2 and is located on one side of the back locking knob block 6, a contact 41 which can be switched on or off by touching is arranged on the contact, and a back locking surface 61, an unlocking surface 62 and a contact surface 63 are sequentially arranged on the outer peripheral surface of the back locking knob block 6 along the clockwise direction.

The anti-locking surface 61 and the unlocking surface 62 are two lateral planes on the outer peripheral surface of the anti-locking knob block 6, an included angle between the plane where the anti-locking surface 61 is located and the plane where the unlocking surface 62 is located is 90 degrees, the contact surface 63 is an arc surface which is radially raised on the outer peripheral surface of the anti-locking knob block 6, in order to ensure that only the contact surface 63 can trigger the contact switch 4, the anti-locking surface 61 and the unlocking surface 62 cannot trigger the contact switch 4, and the distance between the highest point of the contact surface 63 and the rotation center of the anti-locking knob block 6 is greater than the distance between the anti-locking surface 61 and the unlocking surface 62 and the rotation center of the anti-locking knob block.

Positioning mechanism's main component part is shell fragment 5, shell fragment 5 has certain elasticity and thinner thickness, form cambered surface 52 after its long straight face 51's both ends are crooked, can produce elastic deformation after the direction pressurized along the long straight face 51 of perpendicular to, and kick-back automatically after canceling pressure, resume initial form, be equipped with two circular arc right angle draw-in grooves 22 on the internal surface of lock body, circular arc right angle draw-in groove 22 is arranged in to the cambered surface 52 of shell fragment, the right angle region of circular arc right angle draw-in groove 22 inboard is equipped with the screw hole, screw 7 compresses tightly the cambered surface part of shell fragment 5 along the direction that is on a parallel with the cambered surface through packing ring 8, thereby fix shell fragment 5 on the internal surface of lock body along 45 directions of slope roughly.

In this embodiment, the middle frame 2 is one of the components of the lock body, and the inner surface of the middle frame 2 forms a part of the inner surface of the lock body, so that the circular arc right-angle clamping groove 22 is formed on the inner surface of the middle frame 2, and it can be understood that, for the lock body without the middle frame 2, the circular arc right-angle clamping groove 22 can also be formed on the inner surface of other members of the lock body.

The rotation process of the reverse locking knob block 6 comprises an unlocking process and a reverse locking process, the elastic sheet 5 is pressed by the reverse locking knob block 6 to generate elastic deformation, under the energy releasing reaction of the elastic sheet 5, the elastic sheet 5 is tightly attached to the side surface of the reverse locking knob block 6, in a reverse locking state, the reverse locking surface 61 of the reverse locking knob block 6 is attached to the long straight surface 51 of the elastic sheet 5, in an unlocking state, the unlocking surface 62 of the reverse locking knob block 6 is attached to the long straight surface 51 of the elastic sheet 5, and the elastic sheet 5 is attached to the reverse locking surface 61 or the unlocking surface 62 of the reverse locking knob block 6 through the long straight surface 51 to achieve a limiting function.

Of course, the arc part at 5 both ends of shell fragment not only can be the quarter cambered surface, also can be semicircular arc surface or whole circular cambered surface, correspondingly, a draw-in groove for laying shell fragment 5, also can be semicircular draw-in groove or circular draw-in groove, adopt shell fragment 5 of this type of structure, when installing, can follow axial direction conveniently with the both ends card of shell fragment 5 go into the draw-in groove that corresponds, thereby realize the preliminary location to shell fragment 5, on the basis of preliminary location, can further adopt screw and packing ring or other modes to fix, very easily equipment, dismantle and change, and only occupy less space.

3 gomphosis of control circuit board is fixed on center 2 to through screw locking, contact switch 4's signal output part is connected with control circuit board 3's signal input part electricity, and control panel 3 realizes the counter lock and unblock through the counter lock device operation of judging contact switch 4's state control lock, and wherein, the counter lock device by control circuit board 3 control is not limited to electron counter lock device and mechanical counter lock device: the electronic back locking device comprises an unlocking mode for shielding the front panel, such as fingerprint unlocking, password unlocking and the like, and an electromagnetic back locking structure; the mechanical back locking structure is used for locking the back locking door lock by using a mechanical structure or other power structures.

Referring to fig. 5 and 6, fig. 5 is a schematic view illustrating a position of an anti-lock knob of the knob type anti-lock mechanism shown in fig. 1 in an anti-lock state; fig. 6 is a schematic view of the knob type lock reversing mechanism shown in fig. 1 in a reverse locking state, wherein the reverse locking knob block triggers the contact switch through the contact surface.

As shown in the figure, when the back locking mechanism needs to be adjusted to a back locking state, the back locking knob 1 is rotated to a back locking position shown on the outer surface of the middle frame 2, at the moment, the back locking surface 61 on the back locking knob block 6 is attached to the long straight surface 51 on the elastic sheet 5, and the contact point contact surface 63 is contacted with the contact point 41 on the contact switch 4; meanwhile, the contact 41 swings to a trigger state along with the rotation of the back locking knob 1, at the moment, the control circuit board 3 receives a trigger signal of the contact switch 4 to control the back locking device of the electronic lock to operate, the door lock is locked, and the door lock is in a back locking state.

Referring to fig. 7 and 8, fig. 7 is a schematic view illustrating a position of an anti-lock knob of the knob type anti-lock mechanism shown in fig. 1 when the knob type anti-lock mechanism is in an unlocked state; fig. 8 is a schematic view of the contact surface of the anti-lock knob block not triggering the contact switch when the knob type anti-lock mechanism shown in fig. 1 is in an unlocked state.

As shown in the figure, when the anti-lock mechanism needs to be adjusted to an unlocking state, the anti-lock knob 1 is rotated to an unlocking position shown on the outer surface of the middle frame 2, at the moment, the unlocking surface 62 on the anti-lock knob block 6 is attached to the long straight surface 51 on the elastic sheet 5, the contact surface 63 is separated from the contact 41 on the contact switch 4, the contact 41 swings back to an initial position, the contact switch 4 is in an unfired state, the control panel 3 controls the anti-lock device of the electronic lock to operate according to a signal of the contact switch 4 to unlock, and the door lock returns to the non-unlocked state.

In the operation process of back locking and unlocking, when the back locking surface 61 or the unlocking surface 62 of the back locking knob block 6 is attached to the long straight surface 51 of the elastic sheet 5, the back locking knob block 6 cannot rotate or shake due to the elastic action of the elastic sheet 5 on the back locking knob block 6, and the phenomenon that the back locking knob 1 does not incline can be ensured; when the counter lock knob block 6 rotates (not limited to clockwise or counterclockwise) along with the counter lock knob 1, the elastic sheet 5 is extruded by the thrust of the counter lock knob block 6 to generate deformation, and after the deformation rotates by 45 degrees, the elastic sheet 5 continues to rotate under the action of accumulated energy release until the counter lock surface 61 or the unlocking surface 62 of the counter lock knob block 6 is attached to the long straight surface 51 of the elastic sheet 5 to stop rotating, so that a stable state is achieved.

In order to prevent the locking knob block 6 from being positioned by the elastic sheet 5 at other positions, other parts on the outer peripheral surface of the locking knob block 6 can be designed into an arc shape or do not contact with the elastic sheet 5 in the rotating process, so that the situation of error positioning is avoided. For the 90 ° angle region between the unlocking surface 61 and the unlocking surface 62, if the region is designed not to contact the spring 5, the two sides of the elastic sheet can still be positioned after being contacted with the elastic sheet, and for this purpose, a radial raised arc surface can be designed at the position, to form a non-locating surface 65, the distance between the highest point of the non-locating surface 65 and the rotation center of the anti-lock knob block 6 is greater than the distance between the anti-lock surface 61 and the anti-lock surface 62 and the rotation center of the anti-lock knob block 6, since the non-positioning surface 65 is in contact with the spring 5 only in point contact or line contact, but not in surface contact, the lock knob block 6 rotates from the lock position to the unlock position, or the process of rotating from the unlocking position to the unlocking position can not be positioned by the elastic sheet 5, and a user can confirm whether the lock is in the unlocking state or the unlocking state only by hand feeling, so that misoperation can not occur.

In other embodiments, the anti-locking knob block 6 is not limited to the above shape, and various types of anti-locking knob blocks 6 can be designed according to different actual needs.

For example, the unlocking surface 62 and the contact surface 63 are not connected to each other, but a concave portion is provided between the unlocking surface 62 and the contact surface 63 (see fig. 9), or the counter locking surface 61 and the unlocking surface 63 are respectively composed of two or more small planes located on the same plane (see fig. 10), or the area between the counter locking surface 61 and the unlocking surface 62 is designed as an inclined surface (see fig. 11), or the area between the counter locking surface 61 and the unlocking surface 62 is designed as an inward concave arc shape, and at the same time, the contact surface 63 is adjusted from the lower left to the upper left (see fig. 12) according to the position of the contact switch 4, and so on.

In addition, the included angle between the back locking surface 61 and the unlocking surface 62 is not limited to 90 °, and may also be 45 °, 60 °, or 120 °, and the like, and if the included angle between the back locking surface 61 and the unlocking surface 62 is changed, the position of the back locking/unlocking prompt icon on the outer surface of the middle frame 2 is correspondingly adjusted accordingly.

Please refer to fig. 13, fig. 13 is a schematic structural diagram of a second positioning mechanism according to an embodiment of the present invention.

In the present embodiment, the same portions as those in the first embodiment are given the same reference numerals, and the same description is omitted.

As shown in the figures, the difference with respect to the first embodiment is mainly that the positioning mechanism of the knob type back locking mechanism provided in this embodiment is changed to a positioning plate 10 supported by two parallel springs 9 instead of the structure of the elastic sheet 5, in a back locking state, the back locking surface 61 of the back locking knob block 6 is attached to the plate surface of the positioning plate 10, and in an unlocking state, the unlocking surface 62 of the back locking knob block 6 is attached to the plate surface of the positioning plate 10.

Because the spring 9 can apply the elastic force action to the back locking knob block 6 through the positioning plate 10, the back locking knob block 6 can not rotate or shake, and the phenomenon that the back locking knob 1 does not incline can be ensured.

Referring to fig. 14, fig. 14 is a schematic structural diagram of a third positioning mechanism according to an embodiment of the present invention.

In the present embodiment, the same portions as those in the first embodiment are given the same reference numerals, and the same description is omitted.

As shown in the figures, the difference with respect to the first embodiment is mainly that, if the positioning mechanism of the knob type unlocking mechanism provided in this embodiment is changed, the positioning mechanism still adopts the structural form of the elastic sheet 5 ', but the elastic sheet 5' is not fixed at both ends, but only one end is fixed, and the other end is a free end, in the unlocking state, the unlocking surface 61 of the unlocking knob block 6 is attached to the elastic sheet 5 ', and in the unlocking state, the unlocking surface 62 of the unlocking knob block 6 is attached to the elastic sheet 5'.

Because the elastic sheet 5' can exert the elastic action on the counter lock knob block 6, the counter lock knob block 6 can not rotate or shake, and the counter lock knob 1 can not be inclined.

The above embodiments are merely preferred embodiments of the present invention, and are not limited thereto, and different embodiments can be obtained by performing targeted adjustment according to actual needs. For example, the elastic sheet 5 includes but is not limited to an elastic sheet, a spring, or the like, or the control circuit board 3 is integrated with the overall control circuit board of the electronic lock, or the contact switch 4 is replaced by a proximity switch, or the like. This is not illustrated here, since many implementations are possible.

Except that above-mentioned knob formula counter-lock mechanism, the utility model discloses still provide an electronic lock, specifically can be all kinds of electronic locks, including the lock body, locate the locking mechanism of lock body and be used for carrying out the counter-lock mechanism of counter-lock, wherein, counter-lock mechanism is above knob formula counter-lock mechanism, about all the other structures of electronic lock, please refer to prior art, this text is no longer repeated.

The knob type back locking mechanism and the electronic lock provided by the utility model are described in detail above. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the core concepts of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (11)

1. A knob type lock reversing mechanism is characterized by comprising:

the back locking knob is rotatably arranged in a back locking operation area outside the lock body;

the anti-locking knob block is positioned in the lock body and connected with the anti-locking knob so as to be driven by the anti-locking knob to rotate; the peripheral surface of the back locking knob block is provided with a back locking positioning part, an unlocking positioning part and a triggering part;

the contact switch is arranged at the side position of the back locking knob block; in the back locking state, the back locking knob block is positioned at the back locking position by the positioning mechanism through the back locking positioning part, and the contact switch is triggered by the trigger part; in an unlocking state, the reverse locking knob block is positioned at an unlocking position by the positioning mechanism through the unlocking positioning part, and the trigger part does not trigger the contact switch.

2. The knob type relock mechanism according to claim 1, wherein the relock positioning portion includes a relock surface formed on an outer peripheral surface of the relock knob block, the unlock positioning portion includes an unlock surface formed on an outer peripheral surface of the relock knob block, and the trigger portion includes a contact surface formed on an outer peripheral surface of the relock knob block.

3. The knob type relocking mechanism according to claim 2, wherein the relocking surface and the releasing surface are lateral flat surfaces on the outer circumferential surface of the relocking knob block, and the contact surface is an arc-shaped surface that is radially raised on the outer circumferential surface of the relocking knob block; the distance between the highest point of the contact surface and the rotation center of the anti-locking knob block is larger than the distance between the anti-locking surface and the rotation center of the anti-locking knob block.

4. The knob type lock mechanism according to claim 3, wherein an angle between a plane of the lock surface and a plane of the unlock surface is 90 °.

5. The knob type lock reversing mechanism according to claim 4, wherein a non-positioning surface is provided on an outer peripheral surface of the lock reversing knob block in a 90 ° angle region between the lock reversing surface and the unlock surface, the non-positioning surface is a radially raised arc surface, and a distance between a highest point of the non-positioning surface and a rotation center of the lock reversing knob block is greater than a distance between the lock reversing surface and the rotation center of the lock reversing knob block.

6. The knob type lock reaction mechanism according to any one of claims 1 to 5 wherein the positioning mechanism includes an elastic member for making surface contact with the lock reaction positioning portion in the lock reaction state, making surface contact with the unlock positioning portion in the unlock state and applying an elastic force to the lock reaction knob block.

7. The knob type back locking mechanism according to claim 6, wherein the elastic member comprises a spring plate having one or both ends connected to the lock body, the back locking positioning portion of the back locking knob block is attached to the straight surface portion of the spring plate in the back locking state, and the unlocking positioning portion of the back locking knob block is attached to the straight surface portion of the spring plate in the unlocking state.

8. The knob type lock mechanism according to claim 7, wherein the resilient plate has an arc surface portion at both ends of the straight surface portion, and an arc right-angle engaging groove is formed on an inner surface of the lock body, and the arc surface portion of the resilient plate is disposed in the arc right-angle engaging groove and fixed by a fastening member.

9. The knob type counter lock mechanism according to claim 8, wherein the fastening member comprises a screw and a washer, a screw hole is formed in a right-angle area inside the arc right-angle clamping groove, and the screw presses the arc-shaped portion of the elastic sheet through the washer in a direction parallel to the arc-shaped surface.

10. The knob type unlocking mechanism according to claim 9, further comprising a control circuit board electrically connected to the unlocking means for controlling the operation of the unlocking means, wherein the signal output terminal of the contact switch is electrically connected to the signal input terminal of the control circuit board.

11. An electronic lock comprising a lock body, a locking mechanism provided in the lock body, and a counter locking mechanism for counter locking, wherein the counter locking mechanism is the knob type counter locking mechanism according to any one of claims 1 to 10.

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