CN214273253U - Clutch mechanism - Google Patents

Abstract

The utility model discloses a clutch mechanism. Based on the utility model discloses, clutching mechanism includes the theftproof subassembly of installing with clutching assembly integration, transmit to clutching assembly from the panel when external impact force, and be enough to make clutching assembly when handle sleeve and square bar sleeve mistake are closed, the theftproof subassembly can form the splining to interfere to handle sleeve and square bar telescopic synchronous revolution in response to this external impact force, with prevent the illegal unblanking that probably takes place under the closed condition of clutching mechanism mistake, thereby can reduce because clutching mechanism's mistake is closed and lead to the probability of illegal striking unblanking.

Description

Clutch mechanism

Technical Field

The utility model relates to a tool to lock technique, in particular to a clutching mechanism for preventing strike illegal unblanking.

Background

The clutch mechanism between the smart lock and the handle is usually arranged on a panel located on the outdoor side of the door leaf.

For the clutch mechanism which realizes the reset disconnection by means of the elastic force, when the panel is knocked by vibration, the external impact force transmitted to the clutch mechanism through the panel can cause the clutch mechanism to overcome the reset constraint of the elastic force to be closed by mistake, and the incorrect closing of the clutch mechanism responding to the external impact force can cause the illegal unlocking of the intelligent lock.

Therefore, how to reduce the probability of illegal knocking unlocking caused by the false closing of the clutch mechanism becomes a technical problem to be solved in the prior art.

SUMMERY OF THE UTILITY MODEL

In one embodiment, a clutch mechanism is provided that helps reduce the probability of an illegal tap to unlock the lock due to a false closing of the clutch mechanism. The clutch mechanism may include:

a handle sleeve;

the square rod sleeve and the handle sleeve are coaxially arranged on the panel, and are in idle rotation fit in the unlocking direction;

the clutch assembly keeps the square rod sleeve and the handle sleeve in idle running fit in the unlocking direction under the return restraint of first elastic force, and when a driving mechanism generates driving power overcoming the first elastic force, the clutch assembly forms coaxial transmission allowing the handle sleeve and the square rod sleeve to synchronously rotate in the unlocking direction through the splicing fit in the radial direction between the handle sleeve and the square rod sleeve;

a theft prevention assembly integrally mounted with the clutch assembly, the theft prevention assembly releasing synchronous rotation of the handle sleeve and the square bar sleeve under a return constraint of a second elastic force configured to cause the theft prevention assembly to:

in response to an external impact force transmitted from the panel to the clutch assembly against the first elastic force, forming a detent interference with the synchronous rotation of the handle sleeve and the square rod sleeve, wherein a start time of the detent interference is no later than a time when the clutch assembly forms the coaxial transmission in response to the external impact force, and an end time of the detent interference is no earlier than a time when the clutch assembly releases the coaxial transmission when the external impact force disappears.

Optionally, the anti-theft component and the clutch component are integrated in the handle sleeve or the square rod sleeve, and the anti-theft component forms the rotation stopping interference through the insertion fit with a lock hole fixed relative to the panel.

Optionally, the effective insertion direction of the anti-theft component and the lock hole is the same as the effective insertion direction of the clutch component between the handle sleeve and the square rod sleeve.

Optionally, the anti-theft assembly comprises: an anti-theft reset element housed in the square rod sleeve; the anti-theft interference element is movably arranged on the square rod sleeve along the radial direction of the handle sleeve and the square rod sleeve; the anti-theft resetting element generates a second elastic force on the anti-theft interference element to urge the anti-theft interference element to be separated from the lock hole; and in response to the external impact force, the anti-theft interference element overcomes the return constraint of the second elastic force to generate position deviation so as to enable the anti-theft component to be effectively inserted into the lock hole.

Optionally, the clutch assembly comprises: a clutch return element housed in the square rod sleeve; the clutch plug-in element is movably arranged on the square rod sleeve along the radial direction of the handle sleeve and the square rod sleeve; wherein the clutch reset element generates the first elastic force on the clutch plug-in element to urge the clutch plug-in element to separate from the handle sleeve so as to maintain the idle running fit of the square rod sleeve and the handle sleeve in the unlocking direction; and, in response to the driving force or the external impact force, the clutch plug member is positionally biased against a return restraint of the first elastic force to effect plugging of the clutch assembly between the handle sleeve and the square bar sleeve; and the position deviation direction of the anti-theft interference element overcoming the second elastic force is the same as the position deviation direction of the clutch plug-in element overcoming the first elastic force.

Optionally, the handle sleeve has a clutch recess into which the clutch plug element is inserted.

Optionally, at least one of the antitheft interference element and the clutch plug element is a pin, and at least one of the antitheft return element and the clutch return element is a spring.

Optionally, the handle sleeve and the square rod sleeve form a drive fit with a lost motion phase gap in the latching direction; wherein, when the handle sleeve and the square bar sleeve effect a drive fit in the locking direction by consuming the lost motion phase gap, the relative phase between the handle sleeve and the square bar sleeve is such that: the anti-theft component is blocked from being inserted into the lock hole; the insertion of the clutch assembly between the handle sleeve and the square-bar sleeve in the radial direction is blocked.

Optionally, the square rod sleeve has a top lock inner shoulder, the handle sleeve has a top lock outer boss, and the top lock inner shoulder and the top lock outer boss form the lost motion phase gap when the anti-theft component and the clutch component are both in the pluggable position; when the upper locking inner shoulder contacts the upper locking outer shoulder, the anti-theft component and the clutch component are both deviated from the pluggable position.

Optionally, the handle sleeve further comprises a sleeve limiting plate, the sleeve limiting plate is fixed to the panel, the sleeve limiting plate comprises a main plate body and a flange, the main plate body is axially limited by the handle sleeve and the square rod sleeve, the flange is bent from the edge of the main plate body, the flange is located in the radial direction of the handle sleeve and the square rod sleeve, and the lock hole is located in the flange.

Based on the above embodiment, the clutch mechanism includes the anti-theft component integrally installed with the clutch component, when the external impact force is transmitted from the panel to the clutch component and is enough to cause the clutch component to erroneously close the handle sleeve and the square rod sleeve, the anti-theft component can respond to the external impact force to form rotation-stopping interference on the synchronous rotation of the handle sleeve and the square rod sleeve, so as to prevent the possible illegal unlocking in case of the erroneous closing of the clutch mechanism, thereby being capable of reducing the probability of illegal knock unlocking due to the erroneous closing of the clutch mechanism.

Drawings

The following drawings are only schematic and explanatory and do not limit the scope of the present invention:

FIG. 1 is a schematic view of a clutch mechanism in one embodiment to prevent unauthorized knock unlocking;

FIG. 2 is an exploded view of the clutch mechanism shown in FIG. 1;

FIG. 3 is an exploded cross-sectional view of the clutch mechanism shown in FIG. 1;

FIG. 4 is an axial cross-sectional view of a half-assembled construction of the clutch mechanism shown in FIG. 1;

FIG. 5 is a partial cross-sectional view of a half-assembled structure of the clutch mechanism shown in FIG. 1;

FIG. 6 is a schematic view of an example structure of the clutch mechanism shown in FIG. 1 for preventing illegal knock unlocking;

FIG. 7 is a schematic diagram of an example configuration of the clutch mechanism shown in FIG. 1 for preventing malicious theft;

FIG. 8 is a schematic view of a clutch mechanism in another embodiment to prevent illegal knock unlocking;

FIG. 9 is an exploded view of the clutch mechanism shown in FIG. 8;

FIG. 10 is an exploded cross-sectional view of the clutch mechanism shown in FIG. 8;

fig. 11 is a schematic view of an example structure of the clutch mechanism shown in fig. 8 for preventing illegal knock unlocking.

Description of the reference numerals

11 Panel

12 handle

13 drive mechanism

13a clutch push plate

13b power module

14 mounting screw

15 circlip

20. 20' handle sleeve

21 sleeve flange

210 interference groove

22 handle connecting shaft

23 sleeve butt joint shaft

231 engaging and disengaging grooves

232 locking external boss

40 square rod sleeve

41 Main cylinder

42 clutch convex shell

43 square rod connecting shaft

44 locking inner shoulder

45 anti-theft convex shell

60 sleeve limiting plate

61 main board body

62 turnup

63 theft-proof lock hole

70 Clutch assembly

71 Clutch reset element

72 clutch plug-in element

80. 80' anti-theft component

81 anti-theft component casing

82 theft-proof reset element

83 burglarproof interference element

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and examples.

Fig. 1 is a schematic diagram of a principle that the clutch mechanism in one embodiment prevents illegal knock unlocking. Referring to fig. 1, in this embodiment, the clutch mechanism may include a handle sleeve 20, a square rod sleeve 40, a clutch assembly 70, and a theft prevention assembly 80.

The handle sleeve 20 is used to be coaxially connected with the handle 12, the square rod sleeve 40 is used to be coaxially connected with a lock (e.g., an intelligent lock) through a square rod, and the square rod sleeve 40 and the handle sleeve 20 are coaxially installed on the panel 11.

In fig. 1, the grip sleeve 20 is mounted on the panel 11, and the square rod sleeve 40 is mounted on the grip sleeve 20 in a coaxial manner. However, it should be understood that the installation manner of the square rod sleeve 40 and the handle sleeve 20 may be not limited to this, for example, the square rod sleeve 40 may be installed on the panel 11, the handle sleeve 20 may be installed on the square rod sleeve 40, the square rod sleeve 40 may penetrate through the handle sleeve 20 to be coaxially connected with the lock via the square rod, and the handle sleeve 20 may penetrate through the square rod sleeve 40 and the panel 11 to be coaxially connected with the handle.

The square rod sleeve 40 and the handle sleeve 20 can be idly engaged in an unlocking direction R _ unlock, which can be a direction in which a locking bolt of the lock is driven to retract.

The clutch assembly 70 can maintain the idle engagement of the square rod sleeve 40 and the handle sleeve 20 in the unlocking direction R _ unlock under the return restriction of the first elastic force, and when the driving mechanism 13 generates the driving power overcoming the first elastic force, the clutch assembly 70 can form the coaxial transmission allowing the handle sleeve 20 and the square rod sleeve 40 to synchronously rotate in the unlocking direction R _ unlock through the insertion engagement between the handle sleeve 20 and the square rod sleeve 40 in the radial direction.

In fig. 1, the clutch assembly 70 is shown as being mounted on the square rod sleeve 40, but it is understood that the clutch assembly 70 may be mounted on the handle sleeve 20. Also, the driving mechanism 13 may include a clutch pushing plate 13a and a power module 13b such as a motor, and the power module 13a may drive the clutch pushing plate 13a to move to generate a driving force against the first elastic force to the clutch assembly 70.

The anti-theft assembly 80 may be provided integrally with the clutch assembly 70. For example, if the clutch assembly 70 is mounted to the square rod sleeve 40 as shown in fig. 1, the anti-theft element 80 may be integrally mounted to the square rod sleeve 40 together with the clutch assembly 70. Alternatively, if the clutch assembly 70 is modified to be mounted on the handle sleeve 20, the anti-theft element 80 may be integrated with the clutch assembly 70 and mounted on the handle sleeve 20.

Also, the anti-theft assembly 80 may release the synchronous rotation of the handle sleeve 20 and the square rod sleeve 40 under a return constraint of a second elastic force, wherein the second elastic force forming the return constraint on the anti-theft assembly 80 may be configured to enable the anti-theft assembly 80 to:

the synchronous rotation of the grip sleeve 20 and the square rod sleeve 40 forms the rotation stopping interference D _ lock in response to the external impact force SH transmitted from the face plate 11 to the clutch assembly 70 against the first elastic force, wherein the start time of the rotation stopping interference D _ lock is not later (preferably earlier) than the clutch assembly 70 forms the coaxial transmission D _ clutch in response to the external impact force SH, and the end time of the rotation stopping interference D _ lock is not earlier (preferably later) than the clutch assembly 70 releases the coaxial transmission D _ clutch when the external impact force SH disappears.

That is, the start of the stall duration Tvalid _ lock for which the anti-theft component 80 establishes the stall interference D _ lock is no later than (preferably earlier than) the start of the close duration Tvalid _ close for which the clutch component 70 establishes the coaxial transmission D _ close in response to the external impact force SH; also, the anti-theft component 80 forms the end of the stall duration Tvalid _ lock of the stall interference D _ lock no earlier (preferably later) than the end of the closing duration Tvalid _ close of the clutch component 70 that forms the coaxial transmission D _ close in response to the external impact force SH.

Based on this embodiment, the clutch mechanism may include an anti-theft component 80 integrally installed with the clutch component 70, and when the external impact force SH is transmitted from the panel 11 to the clutch component 70 and is sufficient for the clutch component 70 to erroneously close the handle sleeve 20 and the square rod sleeve 40, the anti-theft component 80 can form a rotation-stop interference to the synchronous rotation of the handle sleeve 20 and the square rod sleeve 40 in response to the external impact force SH to prevent the possible illegal unlocking in case of the erroneous closing of the clutch mechanism, thereby being capable of reducing the probability of illegal unlocking due to the erroneous closing of the clutch mechanism.

For a better understanding of this embodiment, the structure of the components in this embodiment will be described in detail below.

Fig. 2 is an exploded view of the clutch mechanism shown in fig. 1. Fig. 3 is an exploded cross-sectional view of the clutch mechanism shown in fig. 1. Fig. 4 is an axial sectional view of a half-assembly structure of the clutch mechanism shown in fig. 1. Fig. 5 is a partial sectional view of a half-assembly structure of the clutch mechanism shown in fig. 1. Fig. 6 is a schematic structural diagram of an example of the clutch mechanism shown in fig. 1 for preventing illegal knock unlocking.

Referring to fig. 1 and fig. 2 to 6, the following description will take as an example that the anti-theft component 80 and the clutch component 70 are integrally mounted on the square rod sleeve 40, and the anti-theft component 80 forms the rotation-stopping interference D _ lock by plugging and matching with the lock hole 63 fixed relative to the panel 11.

The handle sleeve 20 may be mounted on the faceplate 11, the square rod sleeve 40 may be mounted on an end of the handle sleeve 20 opposite to the faceplate 11, and the faceplate 11 is further fixed with a sleeve limiting plate 60, wherein the sleeve limiting plate 60 includes a main plate body 61 forming an axial limit for the handle sleeve 20 and the square rod sleeve 40, that is, the handle sleeve 20 and the square rod sleeve 40 are axially limited between the main plate body 61 and the faceplate 11; the flange 62 formed by bending the edge of the main board body 61 is used for enhancing the strength of the main board body 61, and the flange 62 of the sleeve limiting plate 60 is provided with a locking hole 63 for the anti-theft component 80 to form a rotation-stopping interference D _ lock through the insertion fit with the locking hole 63.

Preferably, the handle sleeve 20 may include a sleeve flange 21, and a handle connecting shaft 22 (an end facing the panel 11) and a sleeve butting shaft 23 (an end facing away from the panel) respectively located at opposite ends of the sleeve flange 21, wherein the handle connecting shaft 22 may be coaxially connected with the handle 12 by the mounting screw 14, the sleeve butting shaft 23 may be coaxially fitted with the square rod sleeve 40, and the sleeve butting shaft 23 and the square rod sleeve 40 form a lost motion fit in the unlocking direction R _ unlock.

Preferably, the square rod sleeve 40 may include a main cylinder 41, a clutch boss 42 and an anti-theft boss 45 protruding from a radial direction side of the main cylinder 41, and a square rod connecting shaft 43 axially protruding from the main cylinder 41. Wherein, the square rod connecting shaft 43 can pass the mainboard body 61 of sleeve limiting plate 60 and be used for the square rod of cartridge connection tool to lock, and the tip that the square rod connecting shaft 43 passed mainboard body 61 can utilize jump ring 15 to compress tightly spacing sleeve limiting plate 60. Also, the clutch assembly 70 may be mounted to the clutch boss 42, and the anti-theft assembly 80 may be mounted to the anti-theft boss 45.

Also, the handle sleeve 20 may have a clutch recess 231 at the sleeve flange 21 (e.g., the end of the sleeve flange 21 facing away from the panel 11) for the clutch assembly 70 to form a plug-in fit between the handle sleeve 20 and the square rod sleeve 40 in the radial direction by plugging in the clutch recess 231.

Preferably, the clutch assembly 70 may include a clutch return element 71 (e.g., a first spring) and a clutch plug element 72 (e.g., a first pin), wherein the clutch return element 71 may be received in the square rod sleeve 40 (e.g., the clutch boss 42), and the clutch plug element 72 may be movably mounted to the square rod sleeve 40 (e.g., the clutch boss 42) in a radial direction of the handle sleeve 20 and the square rod sleeve 40.

The clutch return element 71 can generate the aforementioned first elastic force to the clutch plug element 72, so as to urge the clutch plug element 72 to be separated from the handle sleeve 20 (for example, to be disengaged from the clutch groove 231) to keep the square rod sleeve 40 and the handle sleeve 20 in idle rotation in the unlocking direction R _ unlock;

and, in response to the driving force or the aforementioned external impact force SH, the clutch plug 72 can be positionally displaced (toward the inner circumferential side in the radial direction) against the return restraint of the first elastic force and inserted into the clutch recess 231 to effect the plug-in of the clutch assembly 70 between the handle sleeve 20 and the square bar sleeve 40.

Preferably, the anti-theft assembly 80 may include an anti-theft return element 82 (e.g., a second spring) and an anti-theft interference element 83 (e.g., a second pin), wherein the anti-theft return element 82 may be received in the square rod sleeve 40 (e.g., the anti-theft boss 45) and the anti-theft interference element 83 is movably mounted to the square rod sleeve 40 (e.g., the anti-theft boss 45) in a radial direction of the handle sleeve 20 and the square rod sleeve 40.

The anti-theft reset element 82 can generate the aforementioned second elastic force on the anti-theft interference element 83 to urge the anti-theft interference element 83 to disengage from the lock hole 63, so as to release the synchronous rotation of the handle sleeve 20 and the square rod sleeve 40;

also, in response to the external impact force SH, the antitheft interference element 83 is capable of generating a positional deviation (toward the outer circumferential side in the radial direction) against the return restriction of the second elastic force and being inserted into the lock hole 63 to effect the insertion of the antitheft member 80 into the lock hole 63.

Preferably, the direction of the position deviation of the interference element 83 against the second elastic force may be the same as the direction of the position deviation of the clutch plug element 72 against the first elastic force, so that the plug of the anti-theft assembly 80 into the locking hole 63 is effected in the same direction as the plug of the clutch assembly 70 between the handle sleeve 20 and the square bar sleeve 40 is effected. At this time, the clutch boss 42 and the theft prevention boss 45 may be disposed at opposite sides in the radial direction of the main cylinder case 41 of the square rod sleeve 40.

In practical design, at least one of the antitheft interference element 83 and the clutch plug element 72 may be a pin, and at least one of the antitheft return element 82 and the clutch return element 71 may be a spring.

If, as in the foregoing example, the clutch plug element 72 is a first pin, the antitheft interference element 83 is a second pin, the clutch return element 71 is a first spring, and the antitheft return element 82 is a second spring, then the relationship between the weight of the second pin and the second elastic force generated by the second spring can be set according to the relationship between the weight of the first pin and the first elastic force generated by the first spring, so that the second elastic force can satisfy:

the antitheft assembly 80 forms the rotation stopping interference D _ lock that starts at a time no later (preferably earlier) than the clutch assembly 70 forms the coaxial transmission D _ clutch in response to the external impact force SH transmitted from the face plate 11 to the clutch assembly 70 against the first elastic force, and ends at a time no earlier (preferably later) than the clutch assembly 70 releases the coaxial transmission D _ clutch.

The weight of the first pin selected for the clutch plug 72 and the second pin selected for the anti-theft interference element 83 may be the same or may be different. For example, if the weight of the first pin selected for the clutch plug element 72 and the weight of the second pin selected for the antitheft interference element 83 are the same, the second elastic force generated by the antitheft return element 82 (e.g., the second spring) may be smaller than the first elastic force generated by the clutch return element 71 (e.g., the first spring). Alternatively, if the second elastic force generated by the anti-theft return element 82 (e.g., the second spring) is equal to the first elastic force generated by the clutch return element 71 (e.g., the first spring), the weight of the second pin selected by the anti-theft interference element 83 may be greater than the weight of the first pin selected by the clutch plug element 72. That is, the return restraining capability of the second elastic force on the antitheft interference element 83 (e.g., the second pin) is weaker than the return restraining capability of the first elastic force on the clutch plug element 72 (e.g., the first pin).

The cross-sectional shapes of the first pin selected for the clutch plug 72 and the second pin selected for the tamper-proof interference element 83 may be the same or different regardless of whether the weights of the first pin selected for the clutch plug 72 and the second pin selected for the tamper-proof interference element 83 are the same, and the cross-sectional shapes described herein may be any shapes such as a circle, an ellipse, a square, a polygon, and the like.

The above is merely an example in which the clutch assembly 70 and the anti-theft assembly 80 include a combination of a pin and a spring, but it is understood that the pin may be replaced by other types of elements that can be engaged with each other, such as a nail and a block, and the spring may be replaced by other types of elements that can generate elastic force, such as a spring plate and an elastic body.

In addition, the number of the antitheft interference elements 83 (e.g., the second pins) included in the antitheft assembly 80 and the number of the clutch plug elements 72 (e.g., the first pins) included in the clutch assembly 70 may not be limited to one, i.e., the number of the antitheft interference elements 83 (e.g., the second pins) included in the antitheft assembly 80 and/or the number of the clutch plug elements 72 (e.g., the first pins) included in the clutch assembly 70 may be at least two.

If at least two anti-theft interference elements 83 (e.g., second pins) are included in the anti-theft assembly 80, the same number of locking holes 63 arranged along the arc may be formed, and the insertion effective direction of one of the anti-theft interference elements 83 (e.g., second pins) with the corresponding locking hole 63 is the same as the insertion effective direction of the clutch insertion element 72 (e.g., first pin) between the handle sleeve 20 and the square rod sleeve 40.

If at least two clutch plug elements 72 (e.g., first pins) are included in the clutch assembly 70, the antitheft assembly 80 preferably includes a number of antitheft interference elements 83 (e.g., second pins) that is not less than the number of clutch plug elements 72 (e.g., first pins), and for each clutch plug element 72 (e.g., first pin), there is an insertion effective direction of the corresponding one antitheft interference element 83 (e.g., second pin) with the corresponding lock hole 63, which is the same as the insertion effective direction of the clutch plug element 72 (e.g., first pin) between the handle sleeve 20 and the square bar sleeve 40.

Fig. 7 is a schematic structural view of an example in which the theft prevention capability of the clutch mechanism shown in fig. 1 is disabled by a malicious operation. Referring to fig. 7, the handle sleeve 20 and the square rod sleeve 40 can form a driving fit with a lost motion phase gap Pha _ idle in the locking direction R _ lock.

Referring to fig. 7 in conjunction with fig. 2-6, the inner peripheral wall of the square rod sleeve 40 may have an upper locking inner shoulder 44 and the handle sleeve 20 may have an upper locking outer shoulder 232. For example, the sleeve abutment shaft 23 of the handle sleeve 20 may be inserted into the cylindrical cavity of the square rod sleeve 40, the locking inner shoulder 44 is located on the inner cavity wall of the square rod sleeve 40, and the locking outer projection 232 is located on the outer circumferential wall of the sleeve abutment shaft 23.

When the clutch plug member 72 is aligned with the clutch recess 231 and the antitheft interference member 83 is aligned with the lock hole 63, the antitheft assembly 80 is in the pluggable position with the lock hole 63 and the clutch assembly 70 is in the pluggable position with the handle sleeve 20, that is, the antitheft assembly 80 and the clutch assembly 70 are both in the pluggable position, and a clearance phase gap Pha _ idle is formed between the upper inner shoulder 44 and the upper outer boss 232.

When the upper inner shoulder 44 contacts the upper outer land 232, the clutch plug member 72 is biased away from the clutch groove 231 and the antitheft interference member 83 is biased away from the lock hole 63, so that the antitheft assembly 80 is biased away from the pluggable position with the lock hole 63 and the clutch assembly 70 is biased away from the pluggable position with the handle sleeve 20, i.e., both the antitheft assembly 80 and the clutch assembly 70 are biased away from the pluggable position.

Thus, when the handle sleeve 20 and the square rod sleeve 40 effect the drive engagement in the locking direction R _ lock by consuming the lost motion phase gap Pha _ idle, the relative phase between the handle sleeve 20 and the square rod sleeve 40 can be such that:

the insertion of the antitheft assembly 80 into the lock hole 63 is blocked;

the engagement of the clutch pack 70 between the handle sleeve 20 and the square-bar sleeve 40 in the radial direction is blocked.

If an unauthorized person performs an unauthorized operation to consume the lost motion phase gap Pha _ idle and then strikes the panel 11, the closing capability of the clutch unit 70 is also disabled even if the antitheft function of the antitheft unit 80 is disabled due to the interference of the antitheft unit 80 with the lock hole 63. Thereby, the theft prevention capability can be prevented from being disabled by a malicious operation.

It is understood that if the clutch assembly 70 and the anti-theft assembly 80 are integrated with the square rod sleeve 40, the principle of preventing the illegal unlocking by knocking and the anti-theft capability from being disabled by malicious operation is the same, and the detailed description thereof is omitted.

Fig. 8 is a schematic diagram of a clutch mechanism in another embodiment for preventing illegal knock unlocking. Fig. 9 is an exploded view of the clutch mechanism shown in fig. 8. Fig. 10 is an exploded cross-sectional view of the clutch mechanism shown in fig. 8. Fig. 11 is a schematic view of an example structure of the clutch mechanism shown in fig. 8 for preventing illegal knock unlocking. In another embodiment, the clutch mechanism may further comprise another anti-theft component 80'. In order to facilitate the distinction between the antitheft assembly 80 'and the antitheft assembly 80 of the previous embodiment, hereinafter, the antitheft assembly 80' is referred to as an additional antitheft assembly.

An additional anti-theft component 80' may be mounted to the panel 11. For example, if there is a space between the driving mechanism 13 and the panel 11, the additional anti-theft component 80' may be located in the space (between the power module 13b of the driving mechanism 13 and the panel 11). That is, the additional anti-theft component 80' may be concealed from view by the drive mechanism 13.

The additional anti-theft component 80 'may avoid synchronous rotation of the handle sleeve 20' and the square bar sleeve 40 under a return constraint of a third elastic force, wherein the third elastic force forming the return constraint on the additional anti-theft component 80 'may be configured to enable the additional anti-theft component 80' to:

in response to an external impact force SH transmitted from the face plate 11 to the clutch assembly 70 against the first elastic force, an additional rotation-stopping interference D _ lock 'is formed for the synchronous rotation of the handle sleeve 20' and the square-bar sleeve 40, wherein the start time of the additional rotation-stopping interference D _ lock 'is not later (preferably earlier) than the clutch assembly 70 forms the coaxial transmission D _ clutch in response to the external impact force SH, and the end time of the additional rotation-stopping interference D _ lock' is not earlier (preferably later) than the clutch assembly 70 releases the coaxial transmission D _ clutch when the external impact force SH disappears.

That is, after the external impact force SH against the first elastic force is transmitted from the front panel 11 to the clutch assembly 70, the additional anti-theft component 80 ' may form an additional rotation stopping interference D _ lock ' of the basic rotation stopping duration Tvalid _ lock in addition to the rotation stopping interference D _ lock ' of the anti-theft component 80 forming the rotation stopping duration Tvalid _ lock.

Thus, when the external impact force SH is transmitted from the panel 11 to the clutch assembly 70 and is sufficient for the clutch assembly 70 to erroneously close the handle sleeve 20 'and the square rod sleeve 40, the combination of the antitheft assembly 80 and the additional antitheft assembly 80' can further reduce the probability of the illegal knock unlocking due to the erroneous closing of the clutch mechanism.

Preferably, the additional anti-theft component 80 ' may form an additional anti-rotation interference D _ lock ' by a plug-fit engagement with the handle sleeve 20 '. For example, the handle sleeve 20 'may further have an interference groove 210 located at the sleeve flange 21 (e.g., the end of the sleeve flange 21 facing the panel 11) for the additional anti-theft component 80' to form an additional anti-rotation interference D _ lock 'by a plug-fit with the handle sleeve 20'.

Preferably, the additional antitheft assembly 80 'may include an antitheft assembly housing 81, and a combination of elements identical to an antitheft return element 82 (e.g., a second spring) and an antitheft interference element 83 (e.g., a second pin) of the antitheft assembly 80, wherein the antitheft return element 82 of the additional antitheft assembly 80' may be received in the antitheft assembly housing 81, and the antitheft interference element 83 of the additional antitheft assembly 80 'is movably mounted to the antitheft assembly housing 81 in a radial direction of the handle sleeve 20' and the square rod sleeve 40.

The anti-theft reset element 82 of the additional anti-theft assembly 80 ' may generate the aforementioned third elastic force (which may be the same as the second elastic force in the aforementioned embodiment) on the anti-theft interference element 83 of the additional anti-theft assembly 80 ', urging the anti-theft interference element 83 of the additional anti-theft assembly 80 ' to separate from the handle sleeve 20 ' (e.g., disengage from the interference groove 210) to avoid synchronous rotation of the handle sleeve 20 ' and the square rod sleeve 40;

and, in response to the external impact force SH, the antitheft interference element 83 of the additional antitheft assembly 80 ' can be positionally displaced against the return restraint of the third elastic force (which may be the same as the second elastic force in the foregoing embodiment) and inserted into the interference groove 210 to effect the insertion of the additional antitheft assembly 80 ' with the handle sleeve 20 '.

Preferably, the direction of the position deviation of the anti-theft interference element 83 of the additional anti-theft assembly 80 'against the third elastic force (which may be the same as the second elastic force in the previous embodiment) may also be the same as the direction of the position deviation of the clutch plug element 72 against the first elastic force, so that the direction of the plug-in effect of the additional anti-theft assembly 80' with the handle sleeve 20 'may also be the same as the direction of the plug-in effect of the clutch assembly 70 between the handle sleeve 20' and the square-bar sleeve 40.

In addition, when the upper lock inner shoulder 44 contacts the upper lock outer shoulder 232, so that the clutch plug member 72 is deviated from the clutch groove 231, and the theft preventing interference member 83 of the additional theft preventing assembly 80 ' is deviated from the interference groove 210, that is, the additional theft preventing assembly 80 ' is deviated from the insertable position with the handle sleeve 20 '.

Thus, when the handle sleeve 20 'and the square rod sleeve 40 effect the drive fit in the locking direction R _ lock by consuming the lost motion phase gap Pha _ idle, the closing capability of the clutch assembly 70 is also disabled even if the relative phase between the handle sleeve 20' and the square rod sleeve 40 further hinders the insertion of the additional anti-theft component 80 'into the handle sleeve 20'.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A clutch mechanism, comprising:

a handle sleeve (20);

the square rod sleeve (40) and the handle sleeve (20) are coaxially arranged on the panel (11), and the square rod sleeve (40) is in idle running fit with the handle sleeve (20) in the unlocking direction;

a clutch assembly (70), wherein the clutch assembly (70) keeps the square rod sleeve (40) and the handle sleeve (20) in idle rotation fit in the unlocking direction under the return constraint of a first elastic force, and when a driving mechanism (13) generates driving power overcoming the first elastic force, the clutch assembly (70) forms coaxial transmission allowing the handle sleeve (20) and the square rod sleeve (40) to synchronously rotate in the unlocking direction through the plug-in fit in the radial direction between the handle sleeve (20) and the square rod sleeve (40);

a theft prevention assembly (80), the theft prevention assembly (80) being integrally provided with the clutch assembly (70), the theft prevention assembly (80) releasing the synchronous rotation of the handle sleeve (20) and the square bar sleeve (40) under a return constraint of a second elastic force configured to cause the theft prevention assembly (80) to:

in response to an external impact force transmitted from the faceplate (11) to the clutch assembly (70) against the first elastic force, forming a detent interference to the synchronous rotation of the handle sleeve (20) and the square rod sleeve (40), wherein a start time of the detent interference is no later than the clutch assembly (70) forms the coaxial transmission in response to the external impact force, and an end time of the detent interference is no earlier than the clutch assembly (70) releases the coaxial transmission when the external impact force disappears.

2. Clutch mechanism according to claim 1, wherein the anti-theft component (80) and the clutch component (70) are integrated in the handle sleeve (20) or the square-bar sleeve (40), and wherein the anti-theft component (80) forms the anti-rotation interference by means of a plug-in fit with a locking hole (63) fixed with respect to the panel (11).

3. Clutch mechanism according to claim 2, wherein the engagement direction of the anti-theft element (80) with the locking hole (63) is the same as the engagement direction of the clutch element (70) between the handle sleeve (20) and the square-bar sleeve (40).

4. Clutch mechanism according to claim 2, wherein the anti-theft component (80) comprises:

a tamper-evident return element (82), said tamper-evident return element (82) being housed in said square rod sleeve (40);

an anti-theft interference element (83), the anti-theft interference element (83) being movably mounted to the square rod sleeve (40) in a radial direction of the handle sleeve (20) and the square rod sleeve (40);

wherein the anti-theft reset element (82) generates the second elastic force to the anti-theft interference element (83) to urge the anti-theft interference element (83) to disengage from the lock hole (63);

and, in response to the external impact force, the anti-theft interference element (83) generates a position deviation against the return constraint of the second elastic force to enable the insertion of the anti-theft component (80) with the lock hole (63) to be effective.

5. Clutch mechanism according to claim 4, wherein the clutch assembly (70) comprises:

a clutch return element (71), said clutch return element (71) being housed in said square rod sleeve (40);

a clutch plug element (72), wherein the clutch plug element (72) is movably arranged on the square rod sleeve (40) along the radial direction of the handle sleeve (20) and the square rod sleeve (40);

wherein the clutch return element (71) generates the first elastic force on the clutch plug element (72) to urge the clutch plug element (72) to disengage from the handle sleeve (20) to maintain the lost motion engagement of the square bar sleeve (40) with the handle sleeve (20) in the unlocking direction;

and, in response to the driving force or the external impact force, the clutch plug element (72) is positionally biased against the return restraint of the first elastic force to effect the plugging of the clutch assembly (70) between the handle sleeve (20) and the square bar sleeve (40);

and the direction of the position deviation of the anti-theft interference element (83) against the second elastic force is the same as the direction of the position deviation of the clutch plug element (72) against the first elastic force.

6. Clutch mechanism according to claim 5, wherein the handle sleeve (20) has a clutch recess (231) into which the clutch plug element (72) is inserted.

7. Clutch mechanism according to claim 5, wherein at least one of the anti-theft interference element (83) and the clutch plug element (72) is a pin and at least one of the anti-theft return element (82) and the clutch return element (71) is a spring.

8. Clutch mechanism according to claim 2,

the handle sleeve (20) and the square rod sleeve (40) form a transmission fit with a lost motion phase gap in a locking direction;

wherein, when the handle sleeve (20) and the square rod sleeve (40) effect the drive fit in the locking direction by consuming the lost motion phase gap, the relative phase between the handle sleeve (20) and the square rod sleeve (40) is such that:

the anti-theft component (80) is blocked from being inserted into the lock hole (63);

the coupling assembly (70) is prevented from being inserted in the radial direction between the handle sleeve (20) and the square-bar sleeve (40).

9. Clutch mechanism according to claim 8,

the square rod sleeve (40) has an upper locking internal shoulder (44),

the handle sleeve (20) has an upper locking outer boss (232),

the upper lock inner shoulder (44) and the upper lock outer boss (232) form the lost motion phase gap when the anti-theft assembly (80) and the clutch assembly (70) are both in the pluggable position;

the anti-theft component (80) and the clutch component (70) are both biased to a pluggable position when the upper inner shoulder (44) contacts the upper outer shoulder (232).

10. The clutch mechanism according to claim 2, further comprising a sleeve stopper plate (60), wherein the sleeve stopper plate (60) is fixed to the panel (11), wherein the sleeve stopper plate (60) comprises a main plate body (61) forming an axial stopper for the handle sleeve (20) and the square rod sleeve (40), and a flange (62) bent from an edge of the main plate body (61), wherein the flange (62) is located in a radial direction of the handle sleeve (20) and the square rod sleeve (40), and wherein the lock hole (63) is located in the flange (62).

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